/* roulang page: index */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.25;
            color: var(--text-primary);
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
            width: calc(100% - var(--sidebar-width));
        }

        /* ========== MOBILE TOPBAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }
        .mobile-topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            background: transparent;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-topbar .topbar-logo {
            font-weight: 800;
            font-size: 1.1rem;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .topbar-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.9rem;
        }
        .mobile-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }
        .mobile-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== CONTAINER ========== */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-wide {
            width: 100%;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow {
            width: 100%;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== SECTION SPACING ========== */
        section {
            padding: var(--section-gap) 0;
            position: relative;
        }
        section.section-tight {
            padding: 60px 0;
        }
        section.section-dark {
            background: var(--bg-secondary);
        }
        section.section-darker {
            background: #080c12;
        }
        section.section-glow-top {
            border-top: 1px solid var(--border-color);
        }
        section.section-glow-bottom {
            border-bottom: 1px solid var(--border-color);
        }

        /* ========== SECTION TITLES ========== */
        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            margin-bottom: 12px;
            letter-spacing: 0.02em;
            color: var(--text-primary);
        }
        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 650px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        /* ========== HERO (无大图首屏) ========== */
        .hero-section {
            padding: 80px 0 60px;
            min-height: auto;
            display: flex;
            align-items: center;
            background: var(--bg-primary);
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.04) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-left h1 {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: 0.03em;
            line-height: 1.15;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .hero-left h1 .highlight {
            color: var(--accent-cyan);
        }
        .hero-left .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 500px;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0A0E14;
            border: 2px solid var(--accent-cyan);
        }
        .btn-primary:hover {
            background: #00F0FF;
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            border: 2px solid var(--accent-cyan);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-1px);
        }
        .btn-sm {
            padding: 8px 16px;
            font-size: 0.8rem;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 1rem;
        }
        .hero-right {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .icon-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }
        .icon-matrix-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px 16px;
            text-align: center;
            transition: all var(--transition-fast);
            cursor: default;
        }
        .icon-matrix-item:hover {
            border-color: var(--border-hover);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.1);
            transform: translateY(-2px);
        }
        .icon-matrix-item i {
            font-size: 1.8rem;
            color: var(--accent-cyan);
            margin-bottom: 8px;
            display: block;
        }
        .icon-matrix-item span {
            font-size: 0.78rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .status-bar {
            display: flex;
            align-items: center;
            gap: 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            flex-wrap: wrap;
        }
        .status-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            background: #00E5FF;
            animation: pulse-dot 1.8s ease-in-out infinite;
            flex-shrink: 0;
        }
        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(0, 229, 255, 0.6);
            }
            50% {
                box-shadow: 0 0 0 12px rgba(0, 229, 255, 0);
            }
        }
        .status-text {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .status-text strong {
            color: var(--accent-cyan);
        }

        /* ========== METRICS DASHBOARD ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .metric-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .metric-card .metric-value {
            font-size: 3.2rem;
            font-weight: 900;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1;
            margin-bottom: 6px;
        }
        .metric-card .metric-suffix {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--accent-cyan);
        }
        .metric-card .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-card .metric-bar {
            margin-top: 12px;
            height: 4px;
            background: #2A2E35;
            border-radius: 2px;
            overflow: hidden;
        }
        .metric-card .metric-bar-fill {
            height: 100%;
            background: var(--accent-cyan);
            border-radius: 2px;
            transition: width 1.5s ease;
        }

        /* ========== SERVICE MATRIX ========== */
        .service-matrix {
            display: grid;
            grid-template-columns: 1.3fr 0.7fr 1fr;
            gap: 20px;
        }
        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .service-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .service-card.wide {
            grid-column: span 1;
        }
        .service-card.tall {
            grid-row: span 2;
        }
        .service-card .card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .service-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .service-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
        }
        .service-card .card-img {
            width: 100%;
            height: 140px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .service-card .card-link {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-fast);
        }
        .service-card .card-link:hover {
            gap: 10px;
        }

        /* ========== PLAY INTRO ========== */
        .play-intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .play-intro-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .play-intro-text p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 0.95rem;
            margin-bottom: 12px;
        }
        .play-intro-visual {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .play-intro-visual .mini-stat {
            background: var(--bg-input);
            border-radius: var(--radius-sm);
            padding: 16px;
            text-align: center;
        }
        .play-intro-visual .mini-stat .num {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
        }
        .play-intro-visual .mini-stat .lbl {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== REWARD PREVIEW ========== */
        .reward-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .reward-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 20px;
            text-align: center;
            transition: all var(--transition-fast);
            position: relative;
        }
        .reward-card:hover {
            border-color: var(--accent-orange);
            box-shadow: 0 0 20px rgba(255, 60, 0, 0.15);
            transform: translateY(-3px);
        }
        .reward-card .reward-badge {
            display: inline-block;
            background: rgba(255, 60, 0, 0.15);
            color: var(--accent-orange);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 20px;
            margin-bottom: 12px;
            letter-spacing: 0.05em;
        }
        .reward-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .reward-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .reward-card .reward-icon {
            font-size: 2.2rem;
            color: var(--accent-orange);
            margin-bottom: 14px;
            display: block;
        }

        /* ========== TASK PROGRESS ========== */
        .task-progress-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .task-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            display: flex;
            align-items: center;
            gap: 16px;
            transition: all var(--transition-fast);
        }
        .task-item:hover {
            border-color: var(--border-hover);
        }
        .task-item .task-step {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .task-item .task-step.done {
            background: var(--accent-cyan);
            color: #0A0E14;
        }
        .task-item .task-info {
            flex: 1;
        }
        .task-item .task-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 2px;
        }
        .task-item .task-info span {
            font-size: 0.78rem;
            color: var(--text-muted);
        }
        .task-item .task-progress-bar {
            width: 120px;
            height: 6px;
            background: #2A2E35;
            border-radius: 3px;
            overflow: hidden;
            flex-shrink: 0;
        }
        .task-item .task-progress-fill {
            height: 100%;
            background: var(--accent-cyan);
            border-radius: 3px;
            transition: width 1s ease;
        }

        /* ========== COMPARISON ========== */
        .comparison-wrapper {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .comparison-col {
            padding: 32px 28px;
        }
        .comparison-col.before {
            background: rgba(255, 60, 0, 0.04);
            border-right: 1px solid var(--border-color);
        }
        .comparison-col.after {
            background: rgba(0, 229, 255, 0.04);
        }
        .comparison-col h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .comparison-col.before h4 {
            color: var(--accent-orange);
        }
        .comparison-col.after h4 {
            color: var(--accent-cyan);
        }
        .comparison-col ul {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .comparison-col ul li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            line-height: 1.6;
        }
        .comparison-col ul li i {
            font-size: 0.7rem;
            flex-shrink: 0;
        }
        .comparison-col.before ul li i {
            color: var(--accent-orange);
        }
        .comparison-col.after ul li i {
            color: var(--accent-cyan);
        }

        /* ========== PRODUCT SHOWCASE ========== */
        .showcase-stage {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }
        .showcase-frame {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            position: relative;
        }
        .showcase-frame .frame-topbar {
            background: #1A1F26;
            padding: 10px 14px;
            display: flex;
            align-items: center;
            gap: 8px;
            border-bottom: 1px solid var(--border-color);
        }
        .frame-dot {
            width: 10px;
            height: 10px;
            border-radius: 50%;
            flex-shrink: 0;
        }
        .frame-dot.red {
            background: #FF5F57;
        }
        .frame-dot.yellow {
            background: #FFBD2E;
        }
        .frame-dot.green {
            background: #28CA41;
        }
        .frame-url {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-left: 8px;
        }
        .showcase-frame img {
            width: 100%;
            height: 280px;
            object-fit: cover;
        }
        .showcase-info h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .showcase-info p {
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.9rem;
            margin-bottom: 16px;
        }

        /* ========== SECURITY SYSTEM ========== */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .security-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px 20px;
            text-align: center;
            transition: all var(--transition-fast);
        }
        .security-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .security-card .shield-icon {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.08);
            margin: 0 auto 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }
        .security-card h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .security-card p {
            font-size: 0.78rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* ========== VERTICAL CARD STREAM ========== */
        .vertical-card-stream {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }
        .vertical-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }
        .vertical-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .vertical-card .vc-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            flex-shrink: 0;
        }
        .vertical-card .vc-body {
            padding: 16px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .vertical-card .vc-body h4 {
            font-size: 0.9rem;
            font-weight: 700;
            line-height: 1.4;
        }
        .vertical-card .vc-body p {
            font-size: 0.75rem;
            color: var(--text-muted);
            flex: 1;
        }
        .vertical-card .vc-cta {
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* ========== BRAND INTRO ========== */
        .brand-intro-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .brand-intro-block .brand-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .brand-intro-block .brand-text p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 0.95rem;
            margin-bottom: 12px;
        }
        .brand-intro-block .brand-visual {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            height: 300px;
        }
        .brand-intro-block .brand-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: flex-start;
        }
        .deep-content-block.reverse {
            direction: rtl;
        }
        .deep-content-block.reverse>* {
            direction: ltr;
        }
        .deep-content-text h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 16px;
        }
        .deep-content-text p {
            color: var(--text-secondary);
            line-height: 1.9;
            font-size: 0.9rem;
            margin-bottom: 14px;
        }
        .deep-content-visual {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .deep-content-visual img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            min-height: 260px;
        }

        /* ========== NEWS LIST ========== */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .news-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 18px 22px;
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition-fast);
            background: var(--bg-card);
            flex-wrap: wrap;
        }
        .news-item:last-child {
            border-bottom: none;
        }
        .news-item:hover {
            background: #1A1F26;
        }
        .news-date {
            font-size: 0.78rem;
            color: var(--text-muted);
            flex-shrink: 0;
            min-width: 90px;
            font-family: var(--font-mono);
        }
        .news-title {
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            flex: 1;
            min-width: 200px;
        }
        .news-summary {
            font-size: 0.8rem;
            color: var(--text-secondary);
            flex: 2;
            min-width: 200px;
            line-height: 1.5;
        }
        .news-link {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            white-space: nowrap;
            flex-shrink: 0;
            transition: all var(--transition-fast);
        }
        .news-link:hover {
            text-decoration: underline;
            text-underline-offset: 4px;
        }

        /* ========== FAQ ACCORDION ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-card);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            padding: 18px 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            cursor: pointer;
            transition: background var(--transition-fast);
            text-align: left;
            line-height: 1.5;
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.03);
        }
        .faq-icon {
            font-size: 1.1rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== CTA FORM ========== */
        .cta-form-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }
        .cta-form-section::after {
            content: '';
            position: absolute;
            bottom: -30%;
            left: 10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.05) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .cta-form-left h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .cta-form-left p {
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.9rem;
        }
        .cta-form-right {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
        }
        .form-group {
            margin-bottom: 16px;
        }
        .form-group label {
            display: block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 14px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
            outline: none;
        }
        .form-group textarea {
            min-height: 100px;
        }
        .form-submit {
            width: 100%;
        }

        /* ========== PARTICIPATE CTA ========== */
        .participate-cta {
            text-align: center;
            padding: 60px 0;
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }
        .participate-cta h3 {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 10px;
        }
        .participate-cta p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 0.95rem;
        }
        .participate-cta .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #06090D;
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1fr auto;
            gap: 24px;
            align-items: center;
        }
        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-left .footer-brand {
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.9rem;
            margin-bottom: 4px;
        }
        .footer-left .footer-info {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }
        .footer-left .footer-info span {
            white-space: nowrap;
        }
        .footer-right {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            align-items: center;
        }
        .footer-right a {
            color: var(--text-muted);
            font-size: 0.75rem;
            transition: color var(--transition-fast);
            white-space: nowrap;
        }
        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }
            .sidebar {
                transform: translateX(-260px);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .mobile-overlay {
                display: block;
            }
            .main-content {
                margin-left: 0;
                width: 100%;
                padding-top: var(--topbar-height);
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-matrix {
                grid-template-columns: 1fr 1fr;
            }
            .reward-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .security-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .vertical-card-stream {
                grid-template-columns: repeat(2, 1fr);
            }
            .comparison-wrapper {
                grid-template-columns: 1fr;
            }
            .comparison-col.before {
                border-right: none;
                border-bottom: 1px solid var(--border-color);
            }
            .showcase-stage {
                grid-template-columns: 1fr;
            }
            .brand-intro-block {
                grid-template-columns: 1fr;
            }
            .deep-content-block {
                grid-template-columns: 1fr;
            }
            .cta-form-grid {
                grid-template-columns: 1fr;
            }
            .news-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 8px;
            }
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 20px;
            }
            .hero-left h1 {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                text-align: center;
            }
            .footer-right {
                justify-content: center;
            }
            .footer-left .footer-info {
                justify-content: center;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
            }
            .metrics-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .metric-card .metric-value {
                font-size: 2.2rem;
            }
            .service-matrix {
                grid-template-columns: 1fr;
            }
            .reward-grid {
                grid-template-columns: 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .vertical-card-stream {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
            .icon-matrix {
                grid-template-columns: repeat(2, 1fr);
                gap: 8px;
            }
            .hero-left h1 {
                font-size: 1.6rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .play-intro-grid {
                grid-template-columns: 1fr;
            }
            .task-item {
                flex-wrap: wrap;
                gap: 10px;
            }
            .task-item .task-progress-bar {
                width: 100%;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.82rem;
            }
            .container,
            .container-wide,
            .container-narrow {
                padding: 0 14px;
            }
            section {
                padding: 50px 0;
            }
        }
        @media (max-width: 520px) {
            .metrics-grid {
                grid-template-columns: 1fr;
            }
            .vertical-card-stream {
                grid-template-columns: 1fr;
            }
            .icon-matrix {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-left h1 {
                font-size: 1.4rem;
            }
            .hero-cta-group {
                flex-direction: column;
            }
            .hero-cta-group .btn {
                width: 100%;
                justify-content: center;
            }
            .participate-cta .btn-group {
                flex-direction: column;
                align-items: center;
            }
            .participate-cta .btn-group .btn {
                width: 100%;
                max-width: 300px;
                justify-content: center;
            }
            .form-submit {
                width: 100%;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MOBILE TOPBAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 1100;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }
        .mobile-topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            background: transparent;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-topbar .topbar-brand {
            font-weight: 800;
            font-size: 1.1rem;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .topbar-brand .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }
        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            width: calc(100% - var(--sidebar-width));
        }
        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 40px;
        }
        .container-narrow {
            max-width: 860px;
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-tight {
            padding: 60px 0;
        }
        .section-label {
            font-size: 0.75rem;
            text-transform: uppercase;
            letter-spacing: 0.15em;
            color: var(--accent-cyan);
            font-weight: 700;
            margin-bottom: 12px;
            display: inline-block;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 40px;
            line-height: 1.7;
            max-width: 680px;
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            font-size: 0.9rem;
            font-weight: 700;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            cursor: pointer;
            text-decoration: none;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0A0E14;
            border: 2px solid var(--accent-cyan);
        }
        .btn-primary:hover {
            background: #00F5FF;
            border-color: #00F5FF;
            box-shadow: var(--shadow-glow-cyan);
            color: #0A0E14;
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            color: var(--accent-cyan);
            border: 2px solid var(--accent-cyan);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: var(--shadow-glow-cyan);
            color: var(--accent-cyan);
            transform: translateY(-1px);
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 1rem;
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.8rem;
        }
        .btn-text {
            background: transparent;
            color: var(--accent-cyan);
            padding: 8px 0;
            border-bottom: 2px solid transparent;
            border-radius: 0;
            font-weight: 600;
        }
        .btn-text:hover {
            border-bottom-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: none;
            transform: none;
        }

        /* ========== CARDS ========== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover), 0 0 18px rgba(0, 229, 255, 0.08);
            transform: translateY(-2px);
        }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .card-icon.cyan {
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
        }
        .card-icon.orange {
            background: rgba(255, 60, 0, 0.1);
            color: var(--accent-orange);
        }
        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== HERO (工具落地风格) ========== */
        .hero-section {
            position: relative;
            padding: 80px 0 90px;
            overflow: hidden;
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: -10%;
            width: 55%;
            height: 100%;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.04) 0%, transparent 70%);
            pointer-events: none;
        }
        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 20px;
            letter-spacing: 0.06em;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 229, 255, 0.2);
        }
        .hero-title {
            font-size: 2.6rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 18px;
            color: var(--text-primary);
            letter-spacing: 0.02em;
        }
        .hero-title .highlight {
            color: var(--accent-cyan);
        }
        .hero-pain-point {
            font-size: 1.15rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.7;
            max-width: 480px;
        }
        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-visual {
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
        }
        .hero-visual img {
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            max-width: 100%;
        }
        .hero-visual .glow-ring {
            position: absolute;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            border: 2px dashed rgba(0, 229, 255, 0.15);
            pointer-events: none;
            animation: rotate-ring 20s linear infinite;
        }
        @keyframes rotate-ring {
            from {
                transform: rotate(0deg);
            }
            to {
                transform: rotate(360deg);
            }
        }

        /* ========== METRICS DASHBOARD ========== */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }
        .metric-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .metric-card::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: var(--accent-cyan);
            transform: scaleX(0);
            transition: transform var(--transition-fast);
            transform-origin: left;
        }
        .metric-card:hover::after {
            transform: scaleX(1);
        }
        .metric-card:hover {
            border-color: rgba(0, 229, 255, 0.4);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .metric-value {
            font-family: var(--font-mono);
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-cyan);
            line-height: 1;
            margin-bottom: 8px;
            letter-spacing: -0.02em;
        }
        .metric-unit {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--accent-cyan);
        }
        .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }
        .metric-sub {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== FEATURE GRID ASYMMETRIC ========== */
        .feature-grid-asym {
            display: grid;
            grid-template-columns: 1.5fr 1fr;
            gap: 24px;
        }
        .feature-grid-asym .card-large {
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .feature-grid-asym .card-large .card-title {
            font-size: 1.35rem;
        }
        .feature-grid-asym .card-stack {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .feature-grid-asym .card-stack .card {
            flex: 1;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 20px 24px;
        }
        .feature-grid-asym .card-stack .card .card-icon {
            margin-bottom: 0;
            width: 40px;
            height: 40px;
            font-size: 1.1rem;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
        }
        .comparison-table th,
        .comparison-table td {
            padding: 16px 20px;
            text-align: left;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.9rem;
        }
        .comparison-table th {
            background: var(--bg-tertiary);
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.85rem;
            letter-spacing: 0.04em;
            text-transform: uppercase;
        }
        .comparison-table .col-before {
            color: var(--text-muted);
            background: rgba(255, 60, 0, 0.04);
        }
        .comparison-table .col-after {
            color: var(--text-primary);
            background: rgba(0, 229, 255, 0.03);
        }
        .comparison-table .improvement {
            color: var(--accent-cyan);
            font-weight: 700;
            font-family: var(--font-mono);
        }
        .comparison-table tr:hover td {
            background: rgba(0, 229, 255, 0.02);
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 28px 24px;
            transition: all var(--transition-fast);
            position: relative;
        }
        .scenario-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }
        .scenario-card .scenario-number {
            font-family: var(--font-mono);
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(0, 229, 255, 0.2);
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
        }
        .scenario-card .card-icon {
            margin-bottom: 14px;
        }
        .scenario-card .card-title {
            font-size: 1.05rem;
            margin-bottom: 6px;
        }
        .scenario-card .card-desc {
            font-size: 0.85rem;
        }

        /* ========== PROCESS TIMELINE ========== */
        .process-timeline {
            display: flex;
            gap: 0;
            position: relative;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding-bottom: 10px;
        }
        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 0 16px;
        }
        .process-step::after {
            content: '';
            position: absolute;
            top: 32px;
            left: 60%;
            right: -40%;
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }
        .process-step:last-child::after {
            display: none;
        }
        .process-step-num {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-family: var(--font-mono);
            font-size: 1.4rem;
            font-weight: 900;
            color: var(--accent-cyan);
            margin: 0 auto 16px;
            position: relative;
            z-index: 1;
            transition: all var(--transition-fast);
        }
        .process-step:hover .process-step-num {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
            background: rgba(0, 229, 255, 0.05);
        }
        .process-step-label {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .process-step-desc {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content-block {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 48px 40px;
        }
        .deep-content-block h3 {
            font-size: 1.4rem;
            font-weight: 800;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .deep-content-block p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.85;
            margin-bottom: 16px;
        }
        .deep-content-block .highlight-box {
            background: var(--bg-tertiary);
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        }
        .deep-content-block .highlight-box p {
            margin-bottom: 0;
            font-weight: 600;
            color: var(--text-primary);
        }
        .deep-two-col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            margin-top: 24px;
        }
        .deep-two-col .col-block h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--accent-cyan);
        }
        .deep-two-col .col-block p {
            font-size: 0.88rem;
            margin-bottom: 10px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .faq-item.active {
            border-color: rgba(0, 229, 255, 0.4);
        }
        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            background: transparent;
            cursor: pointer;
            transition: background var(--transition-fast);
            text-align: left;
            gap: 12px;
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.03);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--bg-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            color: var(--text-secondary);
        }
        .faq-item.active .faq-icon {
            background: rgba(0, 229, 255, 0.15);
            color: var(--accent-cyan);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
        }
        .faq-item.active .faq-answer {
            max-height: 500px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 56px 48px;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(0, 229, 255, 0.05) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .cta-info .section-title {
            font-size: 1.7rem;
            margin-bottom: 12px;
        }
        .cta-info .cta-desc {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .cta-form {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .form-group label {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            letter-spacing: 0.03em;
        }
        .form-group input,
        .form-group textarea {
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 16px;
            font-size: 0.9rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
            outline: none;
        }
        .form-group textarea {
            min-height: 90px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            border-top: 1px solid var(--border-color);
            background: var(--bg-sidebar);
            padding: 32px 0;
            margin-top: 0;
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 24px;
        }
        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-brand {
            font-weight: 800;
            font-size: 1.05rem;
            color: var(--text-primary);
            letter-spacing: 0.03em;
        }
        .footer-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .footer-right {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .footer-right a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --sidebar-width: 0px;
                --section-gap: 70px;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                z-index: 1050;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .sidebar-overlay {
                display: block;
            }
            .main-content {
                margin-left: 0;
                width: 100%;
                padding-top: var(--topbar-height);
            }
            .container-wide,
            .container-narrow {
                padding: 0 24px;
            }
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-visual {
                order: -1;
            }
            .hero-visual img {
                max-width: 80%;
            }
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid-asym {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-grid {
                grid-template-columns: 1fr;
            }
            .deep-two-col {
                grid-template-columns: 1fr;
            }
            .process-timeline {
                flex-wrap: wrap;
                gap: 20px;
            }
            .process-step {
                min-width: 140px;
                flex: 0 0 calc(50% - 20px);
            }
            .process-step::after {
                display: none;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .metric-value {
                font-size: 2rem; }
            .metric-unit {
                font-size: 1rem;
            }
            .section {
                padding: var(--section-gap) 0;
            }
            .hero-section {
                padding: 60px 0 50px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-pain-point {
                font-size: 1rem;
            }
            .deep-content-block {
                padding: 32px 24px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 36px 24px;
            }
            .footer-grid {
                flex-direction: column;
                align-items: flex-start;
            }
            .comparison-table-wrap {
                margin: 0 -16px;
                border-radius: 0;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 1001;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }
        .mobile-topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }
        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-topbar .topbar-logo {
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .topbar-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .mobile-topbar .topbar-spacer {
            width: 40px;
            flex-shrink: 0;
        }

        /* overlay */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 999;
            transition: opacity var(--transition-smooth);
        }
        .sidebar-overlay.show {
            display: block;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            position: relative;
        }

        /* ========== CONTAINER ========== */
        .container-wide {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 32px;
        }
        .container-narrow {
            width: 100%;
            max-width: 860px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== BUTTONS ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 13px 28px;
            background: var(--accent-cyan);
            color: #0A0E14;
            font-weight: 700;
            font-size: 0.95rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            box-shadow: 0 0 0 rgba(0, 229, 255, 0);
        }
        .btn-primary:hover {
            background: #33EAFF;
            box-shadow: 0 0 24px rgba(0, 229, 255, 0.35);
            color: #0A0E14;
            transform: translateY(-1px);
        }
        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.25);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 26px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            border: 1px solid var(--accent-cyan);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: #33EAFF;
            color: #33EAFF;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }
        .btn-text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            border-bottom: 1px solid transparent;
            padding-bottom: 2px;
        }
        .btn-text-link:hover {
            border-bottom-color: var(--accent-cyan);
            color: #33EAFF;
            gap: 10px;
        }
        .btn-text-link i {
            transition: transform var(--transition-fast);
        }
        .btn-text-link:hover i {
            transform: translateX(3px);
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background: var(--bg-secondary);
        }
        .section-darker {
            background: var(--bg-sidebar);
        }

        /* ========== HERO SECTION ========== */
        .hero-section {
            position: relative;
            padding: 80px 0 90px;
            background: var(--bg-secondary);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(10, 14, 20, 0.92) 0%, rgba(10, 14, 20, 0.78) 40%, rgba(10, 14, 20, 0.85) 100%);
            z-index: 1;
        }
        .hero-section::after {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: radial-gradient(ellipse at 70% 30%, rgba(0, 229, 255, 0.08) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }
        .hero-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.3);
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }
        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: 0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: #fff;
        }
        .hero-title span {
            color: var(--accent-cyan);
        }
        .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 480px;
        }
        .hero-feature-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
            margin-bottom: 28px;
        }
        .hero-feature-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .hero-feature-list li i {
            color: var(--accent-cyan);
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .hero-cta-group {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }
        .hero-booking-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
            position: relative;
        }
        .hero-booking-card::before {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: var(--radius-lg);
            padding: 1px;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.4), transparent 60%);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
            z-index: 0;
        }
        .hero-booking-card>* {
            position: relative;
            z-index: 1;
        }
        .hero-booking-card .booking-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #fff;
        }
        .hero-booking-card .booking-subtitle {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 18px;
        }
        .booking-slots {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 18px;
        }
        .booking-slot {
            padding: 8px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            font-size: 0.8rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            background: var(--bg-input);
            white-space: nowrap;
        }
        .booking-slot:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.05);
        }
        .booking-slot.selected {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.12);
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .booking-slot.unavailable {
            opacity: 0.4;
            cursor: not-allowed;
            text-decoration: line-through;
            pointer-events: none;
        }
        .hero-booking-card .btn-primary {
            width: 100%;
            text-align: center;
        }

        /* ========== SECTION HEADERS ========== */
        .section-label {
            display: inline-block;
            font-size: 0.78rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 8px;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            line-height: 1.3;
            margin-bottom: 12px;
            color: #fff;
        }
        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 640px;
            margin-bottom: 32px;
        }
        .section-header-center {
            text-align: center;
        }
        .section-header-center .section-desc {
            margin-left: auto;
            margin-right: auto;
        }

        /* ========== CAPABILITY GRID (ASYMMETRIC) ========== */
        .capability-grid {
            display: grid;
            grid-template-columns: 1.3fr 1fr;
            gap: 24px;
        }
        .capability-card-large {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .capability-card-large:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .capability-card-large .cap-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .capability-card-large .cap-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #fff;
        }
        .capability-card-large .cap-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }
        .capability-stack {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .capability-card-sm {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 18px 20px;
            transition: all var(--transition-fast);
            display: flex;
            gap: 14px;
            align-items: center;
        }
        .capability-card-sm:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .capability-card-sm .cap-icon-sm {
            width: 40px;
            height: 40px;
            border-radius: var(--radius-sm);
            background: rgba(255, 60, 0, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            color: var(--accent-orange);
            flex-shrink: 0;
        }
        .capability-card-sm h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 2px;
        }
        .capability-card-sm p {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin: 0;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
            font-size: 0.9rem;
        }
        .comparison-table thead th {
            background: var(--bg-sidebar);
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            color: #fff;
            border-bottom: 2px solid var(--border-color);
            font-size: 0.85rem;
            letter-spacing: 0.03em;
            white-space: nowrap;
        }
        .comparison-table thead th.highlight-col {
            color: var(--accent-cyan);
            border-bottom-color: var(--accent-cyan);
        }
        .comparison-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
            vertical-align: top;
            line-height: 1.5;
        }
        .comparison-table tbody tr:hover td {
            background: rgba(0, 229, 255, 0.03);
        }
        .comparison-table tbody td.highlight-col {
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .comparison-table .check-icon {
            color: #00E5A0;
            font-weight: 700;
        }
        .comparison-table .cross-icon {
            color: #FF5C5C;
            font-weight: 700;
        }

        /* ========== TIMELINE ========== */
        .timeline {
            position: relative;
            padding-left: 40px;
            display: flex;
            flex-direction: column;
            gap: 32px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 17px;
            top: 8px;
            bottom: 8px;
            width: 2px;
            background: var(--border-color);
        }
        .timeline-item {
            position: relative;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 22px 24px;
            transition: all var(--transition-fast);
        }
        .timeline-item:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -31px;
            top: 26px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 10px var(--accent-cyan-glow);
            z-index: 2;
            border: 3px solid var(--bg-primary);
        }
        .timeline-item .timeline-step {
            font-size: 0.75rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 0.05em;
            text-transform: uppercase;
            margin-bottom: 4px;
        }
        .timeline-item h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 6px;
        }
        .timeline-item p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ========== DIMENSION CARDS GRID ========== */
        .dimension-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .dimension-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .dimension-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .dimension-card .dim-icon {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-cyan);
            margin: 0 auto 16px;
        }
        .dimension-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .dimension-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }
        .dimension-card .dim-tag {
            display: inline-block;
            margin-top: 12px;
            padding: 4px 10px;
            border-radius: 12px;
            font-size: 0.7rem;
            font-weight: 600;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        /* ========== DEEP CONTENT BLOCK ========== */
        .deep-content-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .deep-content-block .deep-text h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
            line-height: 1.35;
        }
        .deep-content-block .deep-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .deep-content-block .deep-image {
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border-color);
            aspect-ratio: 16 / 10;
            background: var(--bg-tertiary);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .deep-content-block .deep-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== CASE CARDS ========== */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .case-card .case-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            background: var(--bg-tertiary);
            overflow: hidden;
        }
        .case-card .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .case-card .case-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-card .case-tag {
            font-size: 0.7rem;
            font-weight: 700;
            color: var(--accent-orange);
            letter-spacing: 0.04em;
            text-transform: uppercase;
            margin-bottom: 6px;
        }
        .case-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .case-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .case-card .case-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 16px;
            align-items: center;
        }

        /* ========== FAQ ACCORDION ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }
        .faq-item {
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition-fast);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            text-align: left;
            padding: 18px 22px;
            background: var(--bg-card);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: all var(--transition-fast);
            cursor: pointer;
            letter-spacing: 0.01em;
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.03);
            color: #fff;
        }
        .faq-question .faq-icon {
            width: 22px;
            height: 22px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.7rem;
            flex-shrink: 0;
            transition: all var(--transition-fast);
            color: var(--text-muted);
        }
        .faq-item.open .faq-question {
            background: var(--bg-expanded);
            color: var(--accent-cyan);
        }
        .faq-item.open .faq-question .faq-icon {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
        }
        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-sidebar);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse, rgba(0, 229, 255, 0.05) 0%, transparent 70%);
            pointer-events: none;
            z-index: 1;
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .cta-text h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cta-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .cta-text .cta-benefit-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .cta-text .cta-benefit-list li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        .cta-text .cta-benefit-list li i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }
        .cta-form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }
        .cta-form-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            text-align: center;
        }
        .form-group {
            margin-bottom: 14px;
        }
        .form-group label {
            display: block;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 5px;
            letter-spacing: 0.02em;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 14px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 10px rgba(0, 229, 255, 0.15);
            outline: none;
        }
        .form-group textarea {
            min-height: 80px;
        }
        .cta-form-card .btn-primary {
            width: 100%;
            margin-top: 6px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 28px 0;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 20px;
        }
        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }
        .footer-brand {
            font-weight: 700;
            color: var(--text-primary);
            font-size: 0.95rem;
            letter-spacing: 0.03em;
        }
        .footer-info {
            display: flex;
            flex-direction: column;
            gap: 3px;
            font-size: 0.75rem;
        }
        .footer-right {
            display: flex;
            gap: 18px;
            flex-wrap: wrap;
            align-items: center;
        }
        .footer-right a {
            font-size: 0.78rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .capability-grid {
                grid-template-columns: 1fr;
            }
            .deep-content-block {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .dimension-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .case-grid {
                grid-template-columns: 1fr;
            }
            .cta-inner {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .container-wide,
            .container-narrow {
                padding: 0 20px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .timeline {
                padding-left: 32px;
            }
            .timeline-item::before {
                left: -25px;
                width: 10px;
                height: 10px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
            }
            .hero-title {
                font-size: 1.8rem;
            }
            .hero-subtitle {
                font-size: 0.95rem;
            }
            .hero-booking-card {
                padding: 20px;
            }
            .dimension-grid {
                grid-template-columns: 1fr;
            }
            .capability-card-large {
                flex-direction: column;
                gap: 12px;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .footer-grid {
                flex-direction: column;
                gap: 16px;
            }
            .footer-right {
                gap: 12px;
            }
            .comparison-table-wrap {
                border-radius: var(--radius-sm);
            }
            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 12px;
                font-size: 0.78rem;
            }
            .btn-primary {
                padding: 11px 20px;
                font-size: 0.88rem;
            }
            .btn-outline {
                padding: 10px 18px;
                font-size: 0.82rem;
            }
            .timeline {
                padding-left: 26px;
                gap: 20px;
            }
            .timeline::before {
                left: 11px;
            }
            .timeline-item::before {
                left: -21px;
                width: 9px;
                height: 9px;
                top: 22px;
            }
            .timeline-item {
                padding: 16px;
            }
            .faq-question {
                font-size: 0.88rem;
                padding: 14px 16px;
            }
            .faq-answer-inner {
                padding: 0 16px 16px;
                font-size: 0.82rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.5rem;
            }
            .hero-cta-group {
                flex-direction: column;
                gap: 10px;
            }
            .hero-cta-group .btn-primary,
            .hero-cta-group .btn-outline {
                width: 100%;
                text-align: center;
                justify-content: center;
            }
            .booking-slots {
                gap: 6px;
            }
            .booking-slot {
                padding: 6px 10px;
                font-size: 0.72rem;
            }
            .section-title {
                font-size: 1.25rem;
            }
            .deep-content-block .deep-text h2 {
                font-size: 1.3rem;
            }
            .cta-text h2 {
                font-size: 1.4rem;
            }
            .container-wide,
            .container-narrow {
                padding: 0 14px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        ul {
            list-style: none;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }

        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }

        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MOBILE TOPBAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            align-items: center;
            justify-content: space-between;
            padding: 0 16px;
        }

        .mobile-topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
            flex-shrink: 0;
        }

        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-topbar .topbar-logo {
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .topbar-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .mobile-topbar .topbar-spacer {
            width: 40px;
            flex-shrink: 0;
        }

        /* Mobile drawer overlay */
        .drawer-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
            transition: opacity var(--transition-smooth);
        }

        .drawer-overlay.open {
            display: block;
            opacity: 1;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            padding-top: 0;
        }

        .container-wide {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 40px;
        }

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            padding: 4px 12px;
            border: 1px solid rgba(0, 229, 255, 0.3);
            border-radius: 2px;
            background: rgba(0, 229, 255, 0.04);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: 0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 700px;
        }

        /* ========== BUTTONS ========== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            background: var(--accent-cyan);
            color: #0A0E14;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
        }

        .btn-primary:hover {
            background: #00F5FF;
            color: #0A0E14;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.35);
            transform: translateY(-1px);
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            border: 1px solid var(--accent-cyan);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            letter-spacing: 0.02em;
        }

        .btn-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            color: #00F5FF;
            border-color: #00F5FF;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            border-bottom: 1px solid transparent;
            padding-bottom: 2px;
        }

        .btn-text:hover {
            border-bottom-color: var(--accent-cyan);
            color: #00F5FF;
        }

        /* ========== CARDS ========== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover), 0 0 18px rgba(0, 229, 255, 0.08);
            transform: translateY(-2px);
        }

        .card-icon {
            width: 44px;
            height: 44px;
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            margin-bottom: 16px;
            flex-shrink: 0;
        }

        .card-icon.cyan {
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
        }

        .card-icon.orange {
            background: rgba(255, 60, 0, 0.1);
            color: var(--accent-orange);
        }

        .card-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.01em;
        }

        .card-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== HERO ========== */
        .hero-section {
            position: relative;
            padding: 80px 0 60px;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: 520px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.25;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0) 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0) 100%);
            z-index: 0;
            pointer-events: none;
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 229, 255, 0.08);
            border: 1px solid rgba(0, 229, 255, 0.3);
            border-radius: 2px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            letter-spacing: 0.03em;
            line-height: 1.15;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

        .hero-title .highlight {
            color: var(--accent-cyan);
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 28px;
            max-width: 480px;
        }

        .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .hero-feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 14px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: 2px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .hero-feature-tag i {
            color: var(--accent-cyan);
            font-size: 0.7rem;
        }

        .hero-actions {
            display: flex;
            gap: 14px;
            flex-wrap: wrap;
        }

        /* Hero right: booking panel */
        .hero-booking-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 28px;
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .hero-booking-panel::after {
            content: '';
            position: absolute;
            inset: -1px;
            border-radius: var(--radius-sm);
            border: 1px solid transparent;
            background: linear-gradient(135deg, rgba(0, 229, 255, 0.2), transparent 60%, rgba(255, 60, 0, 0.1)) border-box;
            -webkit-mask: linear-gradient(#fff 0 0) padding-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
            z-index: 0;
        }

        .booking-panel-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .booking-panel-title i {
            color: var(--accent-cyan);
        }

        .booking-slots {
            display: flex;
            flex-direction: column;
            gap: 10px;
            position: relative;
            z-index: 1;
        }

        .booking-slot {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            cursor: pointer;
            transition: all var(--transition-fast);
            font-size: 0.875rem;
            color: var(--text-secondary);
        }

        .booking-slot:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.03);
            color: var(--text-primary);
        }

        .booking-slot.selected {
            border-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            color: var(--accent-cyan);
            font-weight: 600;
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.1);
        }

        .booking-slot .slot-time {
            font-weight: 600;
            font-family: var(--font-mono);
            letter-spacing: 0.03em;
        }

        .booking-slot .slot-badge {
            font-size: 0.7rem;
            padding: 3px 8px;
            border-radius: 2px;
            font-weight: 600;
        }

        .slot-badge.available {
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
        }

        .slot-badge.limited {
            background: rgba(255, 60, 0, 0.1);
            color: var(--accent-orange);
        }

        .booking-cta {
            margin-top: 20px;
            position: relative;
            z-index: 1;
            width: 100%;
            text-align: center;
            padding: 14px;
            font-weight: 700;
            font-size: 0.9rem;
            background: var(--accent-cyan);
            color: #0A0E14;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.15);
        }

        .booking-cta:hover {
            background: #00F5FF;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.35);
        }

        /* ========== GRID ========== */
        .grid-2 {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .grid-4 {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .grid-asymmetric {
            display: grid;
            grid-template-columns: 1.4fr 1fr;
            gap: 32px;
            align-items: start;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 600px;
        }

        .comparison-table thead th {
            background: var(--bg-tertiary);
            padding: 14px 18px;
            text-align: left;
            font-weight: 700;
            color: var(--text-primary);
            border-bottom: 2px solid var(--border-color);
            font-size: 0.85rem;
            letter-spacing: 0.03em;
        }

        .comparison-table tbody td {
            padding: 13px 18px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
            vertical-align: middle;
        }

        .comparison-table tbody tr:hover td {
            background: rgba(0, 229, 255, 0.02);
        }

        .comparison-table .col-before {
            color: var(--text-muted);
        }

        .comparison-table .col-after {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .comparison-table .improvement-badge {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            border-radius: 2px;
            font-weight: 700;
            font-size: 0.78rem;
            font-family: var(--font-mono);
        }

        /* ========== PROCESS STEPS ========== */
        .process-steps {
            display: flex;
            gap: 0;
            position: relative;
            flex-wrap: nowrap;
            overflow-x: auto;
            padding-bottom: 16px;
        }

        .process-step {
            flex: 1;
            min-width: 200px;
            text-align: center;
            position: relative;
            padding: 0 16px;
        }

        .process-step::after {
            content: '';
            position: absolute;
            top: 28px;
            left: 60%;
            width: 80%;
            height: 2px;
            background: var(--border-color);
            z-index: 0;
        }

        .process-step:last-child::after {
            display: none;
        }

        .process-step-num {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-tertiary);
            border: 2px solid var(--border-color);
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin: 0 auto 16px;
            position: relative;
            z-index: 1;
            transition: all var(--transition-fast);
            font-family: var(--font-mono);
        }

        .process-step:hover .process-step-num {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }

        .process-step-title {
            font-weight: 700;
            font-size: 0.95rem;
            color: var(--text-primary);
            margin-bottom: 6px;
        }

        .process-step-desc {
            font-size: 0.8rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            background: var(--bg-card);
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: left;
            gap: 16px;
        }

        .faq-question:hover {
            background: var(--bg-tertiary);
            color: var(--accent-cyan);
        }

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.75rem;
            transition: all var(--transition-fast);
            color: var(--text-muted);
        }

        .faq-item.open .faq-question .faq-icon {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.08);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
        }

        .faq-answer-inner {
            padding: 0 22px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== FORM ========== */
        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }

        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.1);
            outline: none;
        }

        .form-group textarea {
            resize: vertical;
            min-height: 100px;
        }

        .cta-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -80px;
            right: -120px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 0;
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: start;
        }

        .cta-info .cta-title {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .cta-info .cta-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }

        .cta-benefits {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .cta-benefit-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

        .cta-benefit-item i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
            flex-shrink: 0;
        }

        .cta-form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 28px;
            box-shadow: var(--shadow-card);
        }

        .cta-form-card .form-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .cta-form-card .form-title i {
            color: var(--accent-cyan);
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content {
            background: var(--bg-secondary);
            border-radius: var(--radius-sm);
            padding: 40px;
            border: 1px solid var(--border-color);
            line-height: 1.9;
        }

        .deep-content h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            margin-top: 28px;
            letter-spacing: 0.02em;
        }

        .deep-content h3:first-child {
            margin-top: 0;
        }

        .deep-content p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 16px;
        }

        .deep-content .highlight-box {
            background: var(--bg-tertiary);
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 20px;
            margin: 20px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-style: italic;
        }

        /* ========== COMPATIBILITY GRID ========== */
        .compat-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
            gap: 14px;
        }

        .compat-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 14px 16px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .compat-item:hover {
            border-color: var(--accent-cyan);
            color: var(--text-primary);
            background: rgba(0, 229, 255, 0.03);
        }

        .compat-item .compat-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            flex-shrink: 0;
            box-shadow: 0 0 8px rgba(0, 229, 255, 0.4);
        }

        /* ========== METRICS ROW ========== */
        .metrics-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .metric-card {
            text-align: center;
            padding: 28px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .metric-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 20px rgba(0, 229, 255, 0.08);
        }

        .metric-value {
            font-size: 3rem;
            font-weight: 900;
            font-family: var(--font-mono);
            color: var(--accent-cyan);
            letter-spacing: 0.02em;
            line-height: 1;
            margin-bottom: 8px;
        }

        .metric-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .metric-unit {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--accent-cyan);
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            margin-top: 0;
        }

        .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 20px;
        }

        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
        }

        .footer-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .footer-right {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        .footer-right a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }

            .sidebar {
                transform: translateX(-100%);
            }

            .sidebar.open {
                transform: translateX(0);
                width: 260px;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }

            .hero-inner {
                grid-template-columns: 1fr;
                gap: 36px;
            }

            .hero-section {
                padding: 50px 0 40px;
                min-height: auto;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .grid-3 {
                grid-template-columns: 1fr 1fr;
            }

            .grid-4 {
                grid-template-columns: 1fr 1fr;
            }

            .grid-asymmetric {
                grid-template-columns: 1fr;
            }

            .metrics-row {
                grid-template-columns: 1fr 1fr;
            }

            .cta-inner {
                grid-template-columns: 1fr;
            }

            .container-wide,
            .container-narrow {
                padding: 0 24px;
            }

            .process-steps {
                flex-wrap: wrap;
                gap: 20px;
            }

            .process-step {
                flex: 0 0 calc(50% - 10px);
                min-width: auto;
            }

            .process-step::after {
                display: none;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
                --card-padding: 18px;
            }

            .hero-title {
                font-size: 1.7rem;
            }

            .section-title {
                font-size: 1.5rem;
            }

            .grid-2 {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .grid-3 {
                grid-template-columns: 1fr;
                gap: 16px;
            }

            .grid-4 {
                grid-template-columns: 1fr;
                gap: 14px;
            }

            .metrics-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }

            .metric-value {
                font-size: 2.2rem;
            }

            .hero-actions {
                flex-direction: column;
                gap: 10px;
            }

            .hero-actions .btn-primary,
            .hero-actions .btn-secondary {
                width: 100%;
                justify-content: center;
            }

            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }

            .deep-content {
                padding: 24px 18px;
            }

            .compat-grid {
                grid-template-columns: repeat(auto-fill, minmax(110px, 1fr));
                gap: 10px;
            }

            .cta-form-card {
                padding: 20px;
            }

            .footer-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }

            .footer-right {
                flex-direction: column;
                gap: 10px;
            }

            .process-steps {
                flex-direction: column;
                gap: 16px;
            }

            .process-step {
                flex: 1;
                min-width: auto;
                display: flex;
                align-items: center;
                gap: 14px;
                text-align: left;
                padding: 0;
            }

            .process-step-num {
                margin: 0;
                width: 44px;
                height: 44px;
                font-size: 1rem;
                flex-shrink: 0;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.4rem;
            }

            .section-title {
                font-size: 1.3rem;
            }

            .metrics-row {
                grid-template-columns: 1fr 1fr;
                gap: 8px;
            }

            .metric-value {
                font-size: 1.8rem;
            }

            .metric-card {
                padding: 18px 12px;
            }

            .booking-slot {
                flex-wrap: wrap;
                gap: 6px;
                font-size: 0.8rem;
                padding: 10px 12px;
            }

            .comparison-table {
                font-size: 0.75rem;
                min-width: 480px;
            }

            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 8px 10px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            background: var(--bg-primary);
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }
        .mobile-topbar .topbar-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .topbar-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.85rem;
            flex-shrink: 0;
        }
        .hamburger-btn {
            display: flex;
            flex-direction: column;
            gap: 5px;
            padding: 6px;
            cursor: pointer;
            z-index: 1001;
            background: none;
            border: none;
        }
        .hamburger-btn span {
            width: 24px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-fast);
        }
        .hamburger-btn.open span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger-btn.open span:nth-child(2) {
            opacity: 0;
        }
        .hamburger-btn.open span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 998;
        }
        .sidebar-overlay.active {
            display: block;
        }

        /* ========== CONTAINER ========== */
        .container-wide {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 40px;
        }
        .container-narrow {
            width: 100%;
            max-width: 900px;
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-sm {
            padding: 60px 0;
        }

        /* ========== HERO ========== */
        .page-hero {
            position: relative;
            padding: 80px 0 90px;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .page-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
            opacity: 0.5;
        }
        .page-hero .hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            align-items: center;
            gap: 50px;
            flex-wrap: wrap;
        }
        .page-hero .hero-text {
            flex: 1 1 400px;
        }
        .page-hero .hero-badge {
            display: inline-block;
            padding: 6px 14px;
            background: rgba(0, 229, 255, 0.1);
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 20px;
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 20px;
        }
        .page-hero h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: -0.01em;
        }
        .page-hero h1 span {
            color: var(--accent-cyan);
        }
        .page-hero .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 560px;
            margin-bottom: 28px;
        }
        .page-hero .hero-stats {
            flex: 0 0 300px;
            display: flex;
            flex-direction: column;
            gap: 14px;
            background: rgba(20, 24, 31, 0.8);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
        }
        .hero-stat-item {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 8px 0;
            border-bottom: 1px solid rgba(42, 46, 53, 0.5);
        }
        .hero-stat-item:last-child {
            border-bottom: none;
        }
        .hero-stat-value {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent-cyan);
            min-width: 70px;
        }
        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 26px;
            font-weight: 600;
            font-size: 0.9rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0A0E14;
            box-shadow: var(--shadow-glow-cyan);
        }
        .btn-primary:hover {
            background: #00F5FF;
            box-shadow: 0 0 30px rgba(0, 229, 255, 0.35);
            color: #0A0E14;
            transform: translateY(-1px);
        }
        .btn-outline {
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            background: transparent;
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: #00F5FF;
            color: #00F5FF;
        }
        .btn-lg {
            padding: 15px 34px;
            font-size: 1rem;
        }

        /* ========== SECTION HEADERS ========== */
        .section-header {
            margin-bottom: 50px;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.06em;
            text-transform: uppercase;
            margin-bottom: 10px;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.3;
            margin-bottom: 10px;
        }
        .section-header p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
        }

        /* ========== CARDS ========== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .card .card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            flex-shrink: 0;
        }
        .card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }
        .card p {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .card .card-tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(0, 229, 255, 0.08);
            border-radius: 3px;
            font-size: 0.72rem;
            color: var(--accent-cyan);
            font-weight: 600;
            margin-top: 12px;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
        }
        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 600px;
        }
        .comparison-table thead th {
            background: var(--bg-tertiary);
            padding: 14px 18px;
            text-align: left;
            font-weight: 700;
            color: var(--text-primary);
            border-bottom: 2px solid var(--border-color);
            white-space: nowrap;
        }
        .comparison-table thead th.highlight-col {
            color: var(--accent-cyan);
            border-bottom-color: var(--accent-cyan);
        }
        .comparison-table tbody td {
            padding: 13px 18px;
            border-bottom: 1px solid rgba(42, 46, 53, 0.5);
            color: var(--text-secondary);
            vertical-align: top;
        }
        .comparison-table tbody td.highlight-col {
            color: var(--accent-cyan);
            font-weight: 600;
        }
        .comparison-table tbody tr:hover td {
            background: rgba(0, 229, 255, 0.02);
        }
        .check-icon {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .cross-icon {
            color: var(--text-muted);
        }

        /* ========== PROCESS STEPS ========== */
        .process-steps {
            display: flex;
            gap: 0;
            flex-wrap: wrap;
            position: relative;
        }
        .process-step {
            flex: 1 1 180px;
            text-align: center;
            padding: 24px 16px;
            position: relative;
            border: 1px solid var(--border-color);
            background: var(--bg-card);
            transition: all var(--transition-fast);
        }
        .process-step:hover {
            border-color: var(--border-hover);
            background: var(--bg-tertiary);
        }
        .process-step .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.1);
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 800;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 14px;
            font-family: var(--font-mono);
        }
        .process-step h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.8rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .process-arrow {
            display: flex;
            align-items: center;
            color: var(--accent-cyan);
            font-size: 1.2rem;
            flex-shrink: 0;
            padding: 0 4px;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .faq-item {
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            margin-bottom: 8px;
            background: var(--bg-card);
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: rgba(0, 229, 255, 0.3);
        }
        .faq-question {
            width: 100%;
            padding: 18px 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: none;
            text-align: left;
            gap: 16px;
            transition: all var(--transition-fast);
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.02);
        }
        .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
            color: var(--text-secondary);
        }
        .faq-item.open .faq-icon {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            transform: rotate(45deg);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
        }
        .faq-item.open .faq-answer {
            max-height: 400px;
        }
        .faq-answer-inner {
            padding: 0 20px 18px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-section .cta-inner {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 60px 0;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .cta-section p {
            font-size: 1rem;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        /* ========== FORM ========== */
        .form-group {
            margin-bottom: 16px;
            text-align: left;
        }
        .form-group label {
            display: block;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
            letter-spacing: 0.02em;
        }
        .form-input {
            width: 100%;
            padding: 13px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            font-family: var(--font-sans);
        }
        .form-input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
            outline: none;
        }
        .form-input::placeholder {
            color: var(--text-muted);
        }
        textarea.form-input {
            resize: vertical;
            min-height: 100px;
        }
        .form-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px;
            max-width: 520px;
            margin: 0 auto;
        }

        /* ========== SCENARIO CARDS GRID ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-fast);
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .scenario-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .scenario-card .scenario-icon {
            font-size: 1.6rem;
            color: var(--accent-cyan);
        }
        .scenario-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .scenario-card p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== FEATURE HIGHLIGHT BLOCK ========== */
        .feature-highlight-row {
            display: flex;
            gap: 40px;
            align-items: center;
            flex-wrap: wrap;
        }
        .feature-highlight-row.reverse {
            flex-direction: row-reverse;
        }
        .feature-highlight-text {
            flex: 1 1 350px;
        }
        .feature-highlight-text h3 {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }
        .feature-highlight-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 10px;
        }
        .feature-highlight-visual {
            flex: 0 0 380px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }
        .feature-highlight-visual img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            margin-top: 60px;
        }
        .site-footer .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            flex-wrap: wrap;
            gap: 24px;
        }
        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
        }
        .footer-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .footer-right {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.8rem;
            color: var(--text-muted);
        }
        .footer-right a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }
            .sidebar {
                transform: translateX(-100%);
                width: 260px;
                z-index: 1000;
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .main-content {
                margin-left: 0;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                padding-top: var(--topbar-height);
            }
            .page-hero {
                padding: 50px 0 60px;
            }
            .page-hero h1 {
                font-size: 2rem;
            }
            .page-hero .hero-inner {
                flex-direction: column;
                gap: 30px;
            }
            .page-hero .hero-stats {
                flex: 0 0 auto;
                width: 100%;
                flex-direction: row;
                flex-wrap: wrap;
                gap: 10px;
            }
            .hero-stat-item {
                flex: 1 1 120px;
                border-bottom: none;
                border-right: 1px solid rgba(42, 46, 53, 0.5);
                padding: 0 12px;
            }
            .hero-stat-item:last-child {
                border-right: none;
            }
            .container-wide,
            .container-narrow {
                padding: 0 20px;
            }
            .feature-highlight-row {
                flex-direction: column;
                gap: 24px;
            }
            .feature-highlight-row.reverse {
                flex-direction: column;
            }
            .feature-highlight-visual {
                flex: 0 0 auto;
                width: 100%;
            }
            .process-steps {
                flex-direction: column;
                gap: 10px;
            }
            .process-arrow {
                transform: rotate(90deg);
                justify-content: center;
                padding: 0;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
            }
            .page-hero h1 {
                font-size: 1.6rem;
            }
            .page-hero .hero-desc {
                font-size: 0.9rem;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
            .form-card {
                padding: 20px;
            }
            .comparison-table {
                font-size: 0.78rem;
            }
            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 12px;
            }
            .footer-grid {
                flex-direction: column;
                gap: 16px;
            }
            .footer-right {
                gap: 12px;
            }
        }
        @media (max-width: 520px) {
            .page-hero {
                padding: 36px 0 40px;
            }
            .page-hero h1 {
                font-size: 1.4rem;
            }
            .hero-stat-value {
                font-size: 1.2rem;
                min-width: 50px;
            }
            .hero-stat-label {
                font-size: 0.72rem;
            }
            .btn {
                padding: 10px 18px;
                font-size: 0.82rem;
            }
            .btn-lg {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .card {
                padding: 16px;
            }
            .section-header {
                margin-bottom: 30px;
            }
            .container-wide,
            .container-narrow {
                padding: 0 14px;
            }
        }

/* roulang page: category6 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }

        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }

        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }

        .mobile-topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            background: transparent;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }

        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }

        .mobile-topbar .mobile-logo {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .mobile-topbar .mobile-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.85rem;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.6);
            z-index: 998;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }

        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== CONTAINER ========== */
        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 40px;
            width: 100%;
        }

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 40px;
            width: 100%;
        }

        /* ========== SECTION ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.12em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            padding: 4px 12px;
            border: 1px solid rgba(0, 229, 255, 0.25);
            border-radius: 2px;
            background: rgba(0, 229, 255, 0.05);
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
            letter-spacing: 0.01em;
        }

        .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 32px;
            max-width: 700px;
        }

        /* ========== HERO ========== */
        .hero-training {
            position: relative;
            padding: 80px 0 90px;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: 580px;
            display: flex;
            align-items: center;
        }

        .hero-training .hero-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            opacity: 0.22;
            z-index: 0;
        }

        .hero-training .hero-grid-overlay {
            position: absolute;
            inset: 0;
            background:
                linear-gradient(0deg, var(--bg-secondary) 0%, transparent 40%, transparent 60%, var(--bg-secondary) 100%),
                repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 229, 255, 0.02) 2px, rgba(0, 229, 255, 0.02) 4px);
            z-index: 1;
        }

        .hero-training .container-wide {
            position: relative;
            z-index: 2;
            display: flex;
            gap: 60px;
            align-items: center;
            flex-wrap: wrap;
        }

        .hero-training .hero-left {
            flex: 1 1 480px;
            min-width: 0;
        }

        .hero-training .hero-right {
            flex: 1 1 420px;
            min-width: 0;
        }

        .hero-training h1 {
            font-size: 2.8rem;
            font-weight: 900;
            color: var(--text-primary);
            line-height: 1.2;
            margin-bottom: 20px;
            letter-spacing: 0.02em;
        }

        .hero-training h1 span {
            color: var(--accent-cyan);
        }

        .hero-training .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 28px;
            max-width: 520px;
        }

        .hero-training .hero-features {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 32px;
        }

        .hero-training .hero-feature-tag {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            background: var(--bg-tertiary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-color);
            white-space: nowrap;
        }

        .hero-training .hero-feature-tag i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: var(--accent-cyan);
            color: #0A0E14;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border: 2px solid var(--accent-cyan);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn-primary:hover {
            background: #00F5FF;
            box-shadow: var(--shadow-glow-cyan);
            transform: translateY(-1px);
            color: #0A0E14;
        }

        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 14px 32px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            border: 2px solid var(--accent-cyan);
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .btn-secondary:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: var(--shadow-glow-cyan);
            color: var(--accent-cyan);
        }

        /* Hero Right - Booking Card */
        .booking-card {
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }

        .booking-card .booking-title {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .booking-card .booking-subtitle {
            font-size: 0.875rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

        .booking-card .time-slots {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
            margin-bottom: 20px;
        }

        .booking-card .time-slot {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.875rem;
            color: var(--text-secondary);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
        }

        .booking-card .time-slot:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.05);
        }

        .booking-card .time-slot.selected {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.1);
            font-weight: 600;
        }

        .booking-card .form-group {
            margin-bottom: 16px;
        }

        .booking-card .form-group label {
            display: block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 6px;
            letter-spacing: 0.03em;
        }

        .booking-card .form-group input,
        .booking-card .form-group select {
            width: 100%;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }

        .booking-card .form-group input:focus,
        .booking-card .form-group select:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
        }

        .booking-card .btn-submit {
            width: 100%;
            padding: 14px;
            background: var(--accent-cyan);
            color: #0A0E14;
            font-weight: 700;
            font-size: 1rem;
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .booking-card .btn-submit:hover {
            background: #00F5FF;
            box-shadow: var(--shadow-glow-cyan);
        }

        /* ========== CARDS GRID ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
            gap: 24px;
        }

        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover), 0 0 16px rgba(0, 229, 255, 0.08);
            transform: translateY(-2px);
        }

        .card .card-img {
            width: 100%;
            aspect-ratio: 16 / 10;
            object-fit: cover;
            border-radius: var(--radius-sm);
            margin-bottom: 18px;
            background: var(--bg-secondary);
        }

        .card .card-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.1em;
            color: var(--accent-cyan);
            padding: 3px 10px;
            border: 1px solid rgba(0, 229, 255, 0.3);
            border-radius: 2px;
            margin-bottom: 10px;
            align-self: flex-start;
        }

        .card .card-title {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .card .card-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
            flex: 1;
            margin-bottom: 16px;
        }

        .card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 0.875rem;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-fast);
            margin-top: auto;
            align-self: flex-start;
        }

        .card .card-link:hover {
            gap: 10px;
            color: #00F5FF;
        }

        .card .card-link i {
            font-size: 0.75rem;
            transition: transform var(--transition-fast);
        }

        .card .card-link:hover i {
            transform: translateX(3px);
        }

        /* ========== STEPS / PROCESS ========== */
        .steps-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .steps-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(0, 229, 255, 0.015) 2px, rgba(0, 229, 255, 0.015) 4px);
            pointer-events: none;
            z-index: 0;
        }

        .steps-section .container-wide {
            position: relative;
            z-index: 1;
        }

        .steps-list {
            display: flex;
            flex-wrap: wrap;
            gap: 0;
            counter-reset: step;
            position: relative;
        }

        .step-item {
            flex: 1 1 240px;
            min-width: 220px;
            position: relative;
            padding: 36px 28px;
            background: var(--bg-tertiary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
            counter-increment: step;
        }

        .step-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-hover);
            z-index: 2;
        }

        .step-item .step-number {
            font-family: var(--font-mono);
            font-size: 3rem;
            font-weight: 900;
            color: var(--accent-cyan);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
        }

        .step-item .step-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .step-item .step-desc {
            font-size: 0.875rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .step-connector {
            display: none;
            width: 40px;
            height: 2px;
            background: var(--border-color);
            align-self: center;
            flex-shrink: 0;
            position: relative;
        }

        .step-connector::after {
            content: '';
            position: absolute;
            right: -4px;
            top: 50%;
            transform: translateY(-50%);
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            opacity: 0.5;
        }

        /* ========== COMPARISON TABLE ========== */
        .comparison-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .comparison-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
        }

        .comparison-table thead th {
            background: var(--bg-tertiary);
            padding: 16px 20px;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            text-align: left;
            border-bottom: 2px solid var(--border-color);
            white-space: nowrap;
        }

        .comparison-table thead th.highlight-col {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }

        .comparison-table tbody td {
            padding: 14px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-bottom: 1px solid var(--border-color);
            line-height: 1.6;
        }

        .comparison-table tbody td.highlight-col {
            background: rgba(0, 229, 255, 0.02);
        }

        .comparison-table tbody tr:hover td {
            background: rgba(0, 229, 255, 0.03);
        }

        .comparison-table .check-icon {
            color: var(--accent-cyan);
            font-weight: 700;
        }

        .comparison-table .cross-icon {
            color: var(--text-muted);
        }

        .comparison-table .improvement-badge {
            display: inline-block;
            padding: 3px 10px;
            background: rgba(0, 229, 255, 0.1);
            color: var(--accent-cyan);
            border-radius: 2px;
            font-weight: 700;
            font-size: 0.8rem;
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content {
            background: var(--bg-secondary);
            padding: 70px 0;
        }

        .deep-content .content-block {
            display: flex;
            gap: 50px;
            align-items: flex-start;
            flex-wrap: wrap;
        }

        .deep-content .content-text {
            flex: 1 1 500px;
            min-width: 0;
        }

        .deep-content .content-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.4;
        }

        .deep-content .content-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.9;
            margin-bottom: 16px;
        }

        .deep-content .content-text .highlight-box {
            background: var(--bg-tertiary);
            border-left: 3px solid var(--accent-cyan);
            padding: 18px 22px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        .deep-content .content-image {
            flex: 1 1 380px;
            min-width: 280px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
        }

        .deep-content .content-image img {
            width: 100%;
            height: auto;
            display: block;
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }

        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
            text-align: center;
        }

        .scenario-card:hover {
            border-color: var(--border-hover);
            transform: translateY(-2px);
            box-shadow: var(--shadow-hover);
        }

        .scenario-card .scenario-icon {
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }

        .scenario-card .scenario-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .scenario-card .scenario-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 0;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .faq-item {
            border-bottom: 1px solid var(--border-color);
            background: var(--bg-card);
        }

        .faq-item:last-child {
            border-bottom: none;
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: var(--bg-card);
            transition: all var(--transition-fast);
            text-align: left;
            cursor: pointer;
            gap: 16px;
        }

        .faq-question:hover {
            background: var(--bg-tertiary);
            color: var(--accent-cyan);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            border: 1px solid var(--border-color);
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
            font-size: 0.8rem;
            transition: all var(--transition-fast);
            color: var(--text-secondary);
        }

        .faq-item.active .faq-question .faq-icon {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            background: var(--bg-expanded);
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }

        .cta-section .cta-bg-pattern {
            position: absolute;
            inset: 0;
            background:
                radial-gradient(ellipse at 30% 50%, rgba(0, 229, 255, 0.04) 0%, transparent 70%),
                radial-gradient(ellipse at 70% 50%, rgba(255, 60, 0, 0.03) 0%, transparent 70%);
            pointer-events: none;
            z-index: 0;
        }

        .cta-section .container-narrow {
            position: relative;
            z-index: 1;
            text-align: center;
        }

        .cta-section .cta-title {
            font-size: 2rem;
            font-weight: 900;
            color: var(--text-primary);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .cta-section .cta-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 36px;
            line-height: 1.8;
        }

        .cta-form {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
            max-width: 600px;
            margin: 0 auto;
        }

        .cta-form input {
            flex: 1 1 200px;
            min-width: 180px;
            padding: 14px 18px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.95rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }

        .cta-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
        }

        .cta-form .btn-primary {
            flex-shrink: 0;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            margin-top: 0;
        }

        .site-footer .container-wide {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 20px;
        }

        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: flex-start;
            gap: 24px;
            width: 100%;
        }

        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.03em;
        }

        .footer-info {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .footer-right {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            align-items: center;
        }

        .footer-right a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }

            .sidebar {
                transform: translateX(-100%);
                width: 260px;
            }

            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 30px rgba(0, 0, 0, 0.6);
            }

            .sidebar-overlay {
                display: block;
            }

            .mobile-topbar {
                display: flex;
            }

            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }

            .hero-training {
                padding: 50px 0 60px;
                min-height: auto;
            }

            .hero-training h1 {
                font-size: 2.2rem;
            }

            .hero-training .container-wide {
                flex-direction: column;
                gap: 40px;
            }

            .hero-training .hero-left,
            .hero-training .hero-right {
                flex: 1 1 auto;
                width: 100%;
            }

            .cards-grid {
                grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            }

            .steps-list {
                flex-direction: column;
                gap: 16px;
            }

            .step-connector {
                display: none;
            }

            .deep-content .content-block {
                flex-direction: column;
                gap: 30px;
            }

            .container-wide,
            .container-narrow {
                padding: 0 24px;
            }

            .section-title {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
            }

            .hero-training h1 {
                font-size: 1.8rem;
            }

            .hero-training .hero-desc {
                font-size: 0.95rem;
            }

            .hero-training .hero-features {
                gap: 8px;
            }

            .hero-training .hero-feature-tag {
                font-size: 0.78rem;
                padding: 6px 12px;
            }

            .booking-card .time-slots {
                grid-template-columns: 1fr 1fr;
            }

            .cards-grid {
                grid-template-columns: 1fr;
            }

            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }

            .comparison-table-wrap {
                font-size: 0.8rem;
            }

            .comparison-table thead th,
            .comparison-table tbody td {
                padding: 10px 12px;
            }

            .cta-form {
                flex-direction: column;
            }

            .cta-form input {
                flex: 1 1 auto;
                width: 100%;
            }

            .cta-section .cta-title {
                font-size: 1.5rem;
            }

            .footer-grid {
                flex-direction: column;
                align-items: flex-start;
                gap: 16px;
            }

            .footer-info {
                flex-direction: column;
                gap: 4px;
            }

            .section-title {
                font-size: 1.35rem;
            }

            .btn-primary,
            .btn-secondary {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-training h1 {
                font-size: 1.5rem;
            }

            .scenario-grid {
                grid-template-columns: 1fr;
            }

            .booking-card {
                padding: 20px;
            }

            .booking-card .time-slots {
                grid-template-columns: 1fr;
            }

            .deep-content .content-text h3 {
                font-size: 1.25rem;
            }

            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }
        }

        /* ========== ANIMATIONS ========== */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(24px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .section {
            animation: fadeInUp 0.6s ease forwards;
            animation-play-state: paused;
        }

        .section.in-view {
            animation-play-state: running;
        }

/* roulang page: category5 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-cyan);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        ul,
        ol {
            list-style: none;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }
        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }
        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }
        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }
        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }
        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ========== MOBILE TOP BAR ========== */
        .mobile-topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 1001;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }
        .mobile-topbar .hamburger {
            width: 36px;
            height: 36px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            cursor: pointer;
            border-radius: var(--radius-sm);
            transition: background var(--transition-fast);
        }
        .mobile-topbar .hamburger:hover {
            background: rgba(255, 255, 255, 0.05);
        }
        .mobile-topbar .mobile-logo {
            font-weight: 800;
            font-size: 1.1rem;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .mobile-topbar .mobile-logo .logo-icon {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.9rem;
            flex-shrink: 0;
        }
        .sidebar-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 999;
            opacity: 0;
            transition: opacity var(--transition-smooth);
            pointer-events: none;
        }
        .sidebar-overlay.active {
            opacity: 1;
            pointer-events: auto;
        }

        /* ========== CONTAINER ========== */
        .container-wide {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 40px;
        }
        .container-narrow {
            width: 100%;
            max-width: 860px;
            margin: 0 auto;
            padding: 0 40px;
        }

        /* ========== SECTION SPACING ========== */
        .section {
            padding: var(--section-gap) 0;
        }
        .section-dark {
            background: var(--bg-secondary);
        }
        .section-darker {
            background: var(--bg-sidebar);
        }

        /* ========== BUTTONS ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
            cursor: pointer;
            white-space: nowrap;
            letter-spacing: 0.02em;
        }
        .btn-primary {
            background: var(--accent-cyan);
            color: #0A0E14;
            box-shadow: var(--shadow-glow-cyan);
        }
        .btn-primary:hover {
            background: #00F5FF;
            color: #0A0E14;
            box-shadow: 0 0 32px rgba(0, 229, 255, 0.4);
            transform: translateY(-1px);
        }
        .btn-outline {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            border-color: #00F5FF;
            color: #00F5FF;
            box-shadow: 0 0 16px rgba(0, 229, 255, 0.2);
        }
        .btn-lg {
            padding: 15px 36px;
            font-size: 1.05rem;
            border-radius: var(--radius-md);
        }
        .btn-sm {
            padding: 8px 18px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        /* ========== CARDS ========== */
        .card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: var(--card-padding);
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
        }
        .card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover), 0 0 18px rgba(0, 229, 255, 0.08);
            transform: translateY(-2px);
        }

        /* ========== BADGE / TAG ========== */
        .tag {
            display: inline-block;
            padding: 4px 12px;
            border-radius: 20px;
            font-size: 0.78rem;
            font-weight: 500;
            letter-spacing: 0.03em;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.03);
            transition: all var(--transition-fast);
        }
        .tag-accent {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
        }
        .tag-orange {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
            background: rgba(255, 60, 0, 0.06);
        }

        /* ========== SECTION HEADER ========== */
        .section-header {
            margin-bottom: 48px;
        }
        .section-header .section-label {
            display: inline-block;
            font-size: 0.8rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
            font-weight: 600;
        }
        .section-header h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: 0.02em;
            line-height: 1.3;
        }
        .section-header .section-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            margin-top: 10px;
            line-height: 1.6;
        }

        /* ========== HERO (Category Page) ========== */
        .category-hero {
            position: relative;
            padding: 100px 0 90px;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }
        .category-hero .hero-bg {
            position: absolute;
            top: 0;
            right: 0;
            width: 55%;
            height: 100%;
            background-size: cover;
            background-position: center;
            opacity: 0.35;
            mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.1) 100%);
            -webkit-mask-image: linear-gradient(to left, rgba(0, 0, 0, 0.9) 0%, rgba(0, 0, 0, 0.1) 100%);
        }
        .category-hero .hero-overlay {
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 60% 50%, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
        }
        .category-hero .container-wide {
            position: relative;
            z-index: 2;
        }
        .category-hero .hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            flex-wrap: wrap;
        }
        .category-hero .hero-breadcrumb a {
            color: var(--text-secondary);
            transition: color var(--transition-fast);
        }
        .category-hero .hero-breadcrumb a:hover {
            color: var(--accent-cyan);
        }
        .category-hero .hero-breadcrumb .separator {
            color: var(--text-muted);
            font-size: 0.7rem;
        }
        .category-hero h1 {
            font-size: 3rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
        }
        .category-hero h1 .highlight {
            color: var(--accent-cyan);
        }
        .category-hero .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .category-hero .hero-stats {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }
        .category-hero .hero-stat {
            display: flex;
            flex-direction: column;
        }
        .category-hero .hero-stat .stat-num {
            font-family: var(--font-mono);
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--accent-cyan);
            letter-spacing: 0.02em;
        }
        .category-hero .hero-stat .stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* ========== ALTERNATING IMAGE-TEXT ========== */
        .alt-row {
            display: flex;
            align-items: center;
            gap: 60px;
            padding: 40px 0;
            flex-wrap: wrap;
        }
        .alt-row.reverse {
            flex-direction: row-reverse;
        }
        .alt-row .alt-image {
            flex: 1;
            min-width: 300px;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }
        .alt-row .alt-image:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
        }
        .alt-row .alt-image img {
            width: 100%;
            height: auto;
            object-fit: cover;
            aspect-ratio: 16 / 10;
        }
        .alt-row .alt-text {
            flex: 1;
            min-width: 280px;
        }
        .alt-row .alt-text h3 {
            font-size: 1.7rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .alt-row .alt-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.75;
            margin-bottom: 10px;
        }
        .alt-row .alt-text .alt-tags {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            margin-top: 16px;
        }

        /* ========== TIMELINE ========== */
        .timeline {
            position: relative;
            padding-left: 40px;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 15px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border-color);
        }
        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-left: 30px;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: -29px;
            top: 6px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: var(--accent-cyan);
            box-shadow: 0 0 12px var(--accent-cyan-glow);
            border: 2px solid var(--bg-primary);
        }
        .timeline-item .timeline-step {
            font-family: var(--font-mono);
            font-size: 0.8rem;
            color: var(--accent-cyan);
            font-weight: 600;
            letter-spacing: 0.05em;
            margin-bottom: 6px;
        }
        .timeline-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .timeline-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ========== COMPARISON TABLE ========== */
        .compare-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
            min-width: 700px;
        }
        .compare-table thead th {
            background: var(--bg-sidebar);
            padding: 16px 20px;
            text-align: left;
            font-weight: 700;
            color: var(--text-primary);
            border-bottom: 2px solid var(--border-color);
            letter-spacing: 0.03em;
            font-size: 0.95rem;
            white-space: nowrap;
        }
        .compare-table thead th.highlight-col {
            background: rgba(0, 229, 255, 0.08);
            color: var(--accent-cyan);
            border-bottom-color: var(--accent-cyan);
        }
        .compare-table tbody td {
            padding: 14px 20px;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-secondary);
            line-height: 1.5;
        }
        .compare-table tbody td.highlight-col {
            background: rgba(0, 229, 255, 0.03);
            color: var(--text-primary);
            font-weight: 500;
        }
        .compare-table tbody tr:last-child td {
            border-bottom: none;
        }
        .compare-table tbody tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }
        .compare-table .check-icon {
            color: var(--accent-cyan);
            font-weight: 700;
        }
        .compare-table .dash-icon {
            color: var(--text-muted);
        }

        /* ========== TACTICS GRID ========== */
        .tactics-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .tactics-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }
        .tactics-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover), 0 0 20px rgba(0, 229, 255, 0.06);
            transform: translateY(-3px);
        }
        .tactics-card .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            border-bottom: 1px solid var(--border-color);
        }
        .tactics-card .card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .tactics-card .card-body h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }
        .tactics-card .card-body p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }
        .tactics-card .card-body .card-meta {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: start;
        }
        .deep-content .deep-text h3 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.02em;
        }
        .deep-content .deep-text p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 14px;
        }
        .deep-content .deep-text .highlight-box {
            background: rgba(0, 229, 255, 0.05);
            border-left: 3px solid var(--accent-cyan);
            padding: 16px 20px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            margin: 20px 0;
            font-size: 0.9rem;
            color: var(--text-primary);
            line-height: 1.7;
        }
        .deep-content .deep-image {
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
            position: sticky;
            top: 40px;
        }
        .deep-content .deep-image img {
            width: 100%;
            aspect-ratio: 4 / 3;
            object-fit: cover;
        }

        /* ========== SCENARIO CARDS ========== */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .scenario-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .scenario-card:hover {
            border-color: var(--border-hover);
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
        }
        .scenario-card .sc-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 229, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }
        .scenario-card .sc-info h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .scenario-card .sc-info p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ========== FAQ ========== */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 1px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }
        .faq-item {
            background: var(--bg-card);
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition-fast);
        }
        .faq-item:last-child {
            border-bottom: none;
        }
        .faq-question {
            width: 100%;
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: left;
            letter-spacing: 0.02em;
        }
        .faq-question:hover {
            background: rgba(0, 229, 255, 0.03);
        }
        .faq-question .faq-icon {
            width: 24px;
            height: 24px;
            flex-shrink: 0;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-smooth);
            border-radius: 50%;
            background: rgba(0, 229, 255, 0.08);
        }
        .faq-item.open .faq-question .faq-icon {
            transform: rotate(45deg);
            background: rgba(0, 229, 255, 0.15);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth), padding var(--transition-smooth);
            background: var(--bg-expanded);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            background: var(--bg-sidebar);
            position: relative;
            overflow: hidden;
            padding: 80px 0;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-inner {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 50px;
            align-items: center;
            flex-wrap: wrap;
        }
        .cta-text {
            flex: 1;
            min-width: 280px;
        }
        .cta-text h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .cta-text p {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .cta-form-wrap {
            flex: 1;
            min-width: 300px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }
        .cta-form-wrap .form-row {
            display: flex;
            flex-direction: column;
            gap: 6px;
            margin-bottom: 16px;
        }
        .cta-form-wrap label {
            font-size: 0.85rem;
            color: var(--text-secondary);
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .cta-form-wrap input,
        .cta-form-wrap textarea {
            width: 100%;
            padding: 12px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            color: var(--text-primary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            resize: vertical;
        }
        .cta-form-wrap input:focus,
        .cta-form-wrap textarea:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
            outline: none;
        }
        .cta-form-wrap textarea {
            min-height: 90px;
        }
        .cta-form-wrap .btn {
            width: 100%;
            margin-top: 8px;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-sidebar);
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            margin-top: 0;
        }
        .footer-grid {
            display: flex;
            justify-content: space-between;
            align-items: flex-start;
            gap: 30px;
            flex-wrap: wrap;
        }
        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }
        .footer-brand {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            letter-spacing: 0.03em;
        }
        .footer-info {
            display: flex;
            flex-direction: column;
            gap: 4px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }
        .footer-right {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            align-items: center;
        }
        .footer-right a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 60px;
            }
            .sidebar {
                transform: translateX(-100%);
                box-shadow: 4px 0 24px rgba(0, 0, 0, 0.6);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay {
                display: block;
            }
            .mobile-topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }
            .category-hero {
                padding: 60px 0 50px;
                min-height: auto;
            }
            .category-hero h1 {
                font-size: 2.2rem;
            }
            .category-hero .hero-bg {
                width: 100%;
                opacity: 0.2;
            }
            .tactics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .deep-content {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .deep-content .deep-image {
                position: static;
                order: -1;
            }
            .scenario-grid {
                grid-template-columns: 1fr 1fr;
            }
            .alt-row {
                gap: 30px;
            }
            .alt-row,
            .alt-row.reverse {
                flex-direction: column;
            }
            .container-wide,
            .container-narrow {
                padding: 0 24px;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .category-hero .hero-stats {
                gap: 24px;
            }
            .category-hero .hero-stat .stat-num {
                font-size: 1.8rem;
            }
            .cta-inner {
                flex-direction: column;
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 44px;
            }
            .tactics-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
                gap: 14px;
            }
            .category-hero h1 {
                font-size: 1.8rem;
            }
            .category-hero .hero-desc {
                font-size: 0.95rem;
            }
            .category-hero .hero-stats {
                gap: 18px;
            }
            .category-hero .hero-stat .stat-num {
                font-size: 1.5rem;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .alt-row .alt-text h3 {
                font-size: 1.3rem;
            }
            .compare-table {
                font-size: 0.78rem;
            }
            .compare-table thead th,
            .compare-table tbody td {
                padding: 10px 12px;
            }
            .timeline {
                padding-left: 28px;
            }
            .timeline-item {
                padding-left: 20px;
            }
            .timeline-item::before {
                left: -22px;
                width: 10px;
                height: 10px;
            }
            .footer-grid {
                flex-direction: column;
                gap: 16px;
            }
            .footer-right {
                gap: 14px;
            }
            .cta-form-wrap {
                padding: 20px;
            }
            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }
            .btn {
                padding: 10px 22px;
                font-size: 0.9rem;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .faq-item.open .faq-answer {
                padding: 0 16px 14px;
            }
        }

        @media (max-width: 520px) {
            .category-hero {
                padding: 40px 0 36px;
            }
            .category-hero h1 {
                font-size: 1.5rem;
            }
            .category-hero .hero-stats {
                flex-direction: column;
                gap: 10px;
            }
            .section-header h2 {
                font-size: 1.25rem;
            }
            .deep-content .deep-text h3 {
                font-size: 1.3rem;
            }
            .scenario-card {
                flex-direction: column;
                gap: 10px;
                padding: 18px;
            }
            .card {
                padding: 16px;
            }
            .tactics-card .card-body {
                padding: 14px;
            }
        }

/* roulang page: category7 */
:root {
            --bg-primary: #0A0E14;
            --bg-secondary: #0D1117;
            --bg-tertiary: #14181F;
            --bg-sidebar: #06090D;
            --bg-card: #14181F;
            --bg-input: #1A1F26;
            --bg-expanded: #1A1F26;
            --text-primary: #E8ECF1;
            --text-secondary: #B0B8C1;
            --text-muted: #6B7280;
            --accent-cyan: #00E5FF;
            --accent-orange: #FF3C00;
            --accent-cyan-glow: rgba(0, 229, 255, 0.3);
            --accent-orange-glow: rgba(255, 60, 0, 0.25);
            --border-color: #2A2E35;
            --border-hover: #00E5FF;
            --shadow-card: 0 2px 12px rgba(0, 0, 0, 0.4);
            --shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.6);
            --shadow-glow-cyan: 0 0 20px rgba(0, 229, 255, 0.2);
            --radius-sm: 4px;
            --radius-md: 4px;
            --radius-lg: 4px;
            --sidebar-width: 240px;
            --topbar-height: 56px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-mono: 'SF Mono', 'Cascadia Code', 'Consolas', 'Monaco', monospace;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Inter', 'Geist', sans-serif;
            --section-gap: 100px;
            --inner-gap: 24px;
            --card-padding: 24px;
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            min-height: 100vh;
            display: flex;
            flex-direction: row;
            overflow-x: hidden;
        }

        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }

        a:hover {
            color: var(--accent-cyan);
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }

        button {
            cursor: pointer;
        }

        /* ========== SIDEBAR NAVIGATION ========== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: var(--sidebar-width);
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition-smooth);
            overflow-y: auto;
            overflow-x: hidden;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            height: 80px;
            padding: 0 20px;
            border-bottom: 1px solid var(--border-color);
            flex-shrink: 0;
        }

        .sidebar-logo a {
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            white-space: nowrap;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .sidebar-logo .logo-icon {
            width: 34px;
            height: 34px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .sidebar-nav {
            flex: 1;
            padding: 16px 0;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-nav a {
            display: flex;
            align-items: center;
            padding: 11px 20px;
            font-size: 0.875rem;
            color: var(--text-secondary);
            border-left: 3px solid transparent;
            transition: all var(--transition-fast);
            gap: 10px;
            white-space: nowrap;
            position: relative;
        }

        .sidebar-nav a i {
            width: 18px;
            text-align: center;
            font-size: 0.9rem;
            flex-shrink: 0;
        }

        .sidebar-nav a:hover {
            color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.04);
        }

        .sidebar-nav a.active {
            color: var(--accent-cyan);
            border-left-color: var(--accent-cyan);
            background: rgba(0, 229, 255, 0.06);
            font-weight: 600;
        }

        .sidebar-footer {
            padding: 16px 20px;
            border-top: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 8px;
            flex-shrink: 0;
        }

        .sidebar-footer a {
            font-size: 0.75rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }

        .sidebar-footer a:hover {
            color: var(--accent-cyan);
        }

        /* ========== TOPBAR MOBILE ========== */
        .topbar {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--topbar-height);
            background: var(--bg-sidebar);
            border-bottom: 1px solid var(--border-color);
            z-index: 999;
            align-items: center;
            padding: 0 16px;
            justify-content: space-between;
        }

        .topbar .hamburger {
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--text-primary);
            background: transparent;
            border: none;
            cursor: pointer;
            transition: color var(--transition-fast);
            flex-shrink: 0;
        }

        .topbar .hamburger:hover {
            color: var(--accent-cyan);
        }

        .topbar .topbar-logo {
            font-weight: 800;
            font-size: 1.15rem;
            letter-spacing: 0.03em;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .topbar .topbar-logo .logo-icon-sm {
            width: 28px;
            height: 28px;
            border-radius: var(--radius-sm);
            background: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #0A0E14;
            font-weight: 900;
            font-size: 0.85rem;
            flex-shrink: 0;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.7);
            z-index: 998;
            transition: opacity var(--transition-smooth);
        }

        .sidebar-overlay.active {
            display: block;
        }

        /* ========== MAIN CONTENT AREA ========== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            padding-top: 0;
        }

        .container-wide {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 32px;
        }

        .container-narrow {
            max-width: 900px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ========== SECTION BASE ========== */
        .section {
            padding: var(--section-gap) 0;
        }

        .section-dark {
            background: var(--bg-secondary);
        }

        .section-label {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 700px;
        }

        /* ========== HERO ========== */
        .hero-news {
            position: relative;
            padding: 80px 0 80px;
            background: var(--bg-secondary);
            overflow: hidden;
            min-height: 420px;
            display: flex;
            align-items: center;
        }

        .hero-news-bg {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }

        .hero-news::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(10, 14, 20, 0.5) 0%, rgba(10, 14, 20, 0.95) 100%);
            z-index: 1;
        }

        .hero-news .container-wide {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            gap: 48px;
            flex-wrap: wrap;
        }

        .hero-news-left {
            flex: 1;
            min-width: 280px;
        }

        .hero-news-left .hero-badge-row {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 20px;
        }

        .hero-badge-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px 18px;
            text-align: center;
            min-width: 80px;
            transition: all var(--transition-fast);
        }

        .hero-badge-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        .hero-badge-item .badge-num {
            font-family: var(--font-mono);
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1;
        }

        .hero-badge-item .badge-label {
            font-size: 0.7rem;
            color: var(--text-muted);
            margin-top: 4px;
            letter-spacing: 0.04em;
        }

        .hero-news-left h1 {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-primary);
            letter-spacing: 0.03em;
            line-height: 1.2;
            margin-bottom: 12px;
        }

        .hero-news-left h1 span {
            color: var(--accent-cyan);
        }

        .hero-news-left .hero-subtitle {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
            max-width: 500px;
        }

        .hero-news-left .hero-cta-row {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            background: var(--accent-cyan);
            color: #0A0E14;
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            letter-spacing: 0.03em;
            border: 2px solid var(--accent-cyan);
            cursor: pointer;
        }

        .btn-primary:hover {
            background: #00F5FF;
            box-shadow: var(--shadow-glow-cyan);
            color: #0A0E14;
            transform: translateY(-1px);
        }

        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 26px;
            background: transparent;
            color: var(--accent-cyan);
            font-weight: 700;
            font-size: 0.9rem;
            border-radius: var(--radius-sm);
            border: 2px solid var(--accent-cyan);
            transition: all var(--transition-fast);
            letter-spacing: 0.03em;
            cursor: pointer;
        }

        .btn-outline:hover {
            background: rgba(0, 229, 255, 0.08);
            box-shadow: var(--shadow-glow-cyan);
            color: #00F5FF;
            transform: translateY(-1px);
        }

        .hero-news-right {
            flex: 0 0 380px;
            min-width: 300px;
            position: relative;
        }

        .hero-news-right .hero-img-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .hero-news-right .hero-img-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-hover);
        }

        .hero-news-right .hero-img-card img {
            width: 100%;
            height: 240px;
            object-fit: cover;
            display: block;
        }

        .hero-news-right .hero-img-card .img-card-info {
            padding: 16px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            display: flex;
            align-items: center;
            gap: 8px;
            border-top: 1px solid var(--border-color);
        }

        .hero-news-right .hero-img-card .img-card-info .live-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-orange);
            animation: pulse-dot 1.5s ease-in-out infinite;
        }

        @keyframes pulse-dot {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(255, 60, 0, 0.6);
            }
            50% {
                box-shadow: 0 0 0 10px rgba(255, 60, 0, 0);
            }
        }

        /* ========== FEATURED HEADLINE ========== */
        .featured-headline {
            padding: 0 0 var(--section-gap);
        }

        .featured-headline .headline-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            display: flex;
            flex-wrap: wrap;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
        }

        .featured-headline .headline-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-hover);
        }

        .headline-card .headline-img {
            flex: 0 0 48%;
            min-width: 300px;
            position: relative;
            overflow: hidden;
        }

        .headline-card .headline-img img {
            width: 100%;
            height: 100%;
            min-height: 320px;
            object-fit: cover;
            display: block;
            transition: transform 0.4s ease;
        }

        .headline-card:hover .headline-img img {
            transform: scale(1.04);
        }

        .headline-card .headline-img .headline-tag {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--accent-orange);
            color: #fff;
            font-size: 0.7rem;
            font-weight: 700;
            padding: 5px 12px;
            border-radius: var(--radius-sm);
            letter-spacing: 0.05em;
            z-index: 2;
        }

        .headline-card .headline-body {
            flex: 1;
            padding: 32px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            min-width: 280px;
        }

        .headline-body .headline-date {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .headline-body h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.4;
            letter-spacing: 0.02em;
        }

        .headline-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 20px;
        }

        .headline-body .link-more {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all var(--transition-fast);
            align-self: flex-start;
            border-bottom: 1px solid transparent;
            padding-bottom: 2px;
        }

        .headline-body .link-more:hover {
            border-bottom-color: var(--accent-cyan);
            color: #00F5FF;
            gap: 10px;
        }

        /* ========== TIMELINE NEWS ========== */
        .timeline-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .timeline-list {
            position: relative;
            padding-left: 32px;
            border-left: 2px solid var(--border-color);
            margin-left: 0;
        }

        .timeline-item {
            position: relative;
            margin-bottom: 36px;
            padding-bottom: 0;
        }

        .timeline-item:last-child {
            margin-bottom: 0;
        }

        .timeline-item::before {
            content: '';
            position: absolute;
            left: -40px;
            top: 6px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-color);
            transition: all var(--transition-fast);
            z-index: 2;
        }

        .timeline-item:hover::before {
            border-color: var(--accent-cyan);
            background: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 229, 255, 0.4);
        }

        .timeline-item .timeline-date {
            font-size: 0.78rem;
            color: var(--accent-cyan);
            font-family: var(--font-mono);
            margin-bottom: 6px;
            letter-spacing: 0.04em;
        }

        .timeline-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .timeline-item:hover h4 {
            color: var(--accent-cyan);
        }

        .timeline-item .timeline-excerpt {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 10px;
        }

        .timeline-item .link-more-sm {
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            border-bottom: 1px solid transparent;
            padding-bottom: 1px;
        }

        .timeline-item .link-more-sm:hover {
            border-bottom-color: var(--accent-cyan);
            gap: 7px;
        }

        /* ========== NEWS GRID ========== */
        .news-grid-section {
            padding: var(--section-gap) 0;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-grid-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
            box-shadow: var(--shadow-card);
            display: flex;
            flex-direction: column;
        }

        .news-grid-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-hover);
            transform: translateY(-3px);
        }

        .news-grid-card .grid-card-img {
            height: 180px;
            overflow: hidden;
        }

        .news-grid-card .grid-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }

        .news-grid-card:hover .grid-card-img img {
            transform: scale(1.06);
        }

        .news-grid-card .grid-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .grid-card-body .grid-card-date {
            font-size: 0.75rem;
            color: var(--text-muted);
            margin-bottom: 6px;
        }

        .grid-card-body h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
            transition: color var(--transition-fast);
        }

        .news-grid-card:hover .grid-card-body h4 {
            color: var(--accent-cyan);
        }

        .grid-card-body .grid-card-excerpt {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 14px;
        }

        .grid-card-body .link-more-xs {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: all var(--transition-fast);
            align-self: flex-start;
        }

        .grid-card-body .link-more-xs:hover {
            gap: 7px;
            color: #00F5FF;
        }

        /* ========== DEEP CONTENT ========== */
        .deep-content-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
        }

        .deep-content-block {
            margin-bottom: 48px;
        }

        .deep-content-block:last-child {
            margin-bottom: 0;
        }

        .deep-content-block h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
            line-height: 1.3;
            padding-left: 16px;
            border-left: 3px solid var(--accent-cyan);
        }

        .deep-content-block .deep-text {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.9;
            column-gap: 32px;
        }

        .deep-content-block .deep-text p {
            margin-bottom: 16px;
        }

        .deep-content-block .deep-text p:last-child {
            margin-bottom: 0;
        }

        .deep-content-block.two-col .deep-text {
            columns: 2;
            column-gap: 40px;
        }

        @media (max-width: 768px) {
            .deep-content-block.two-col .deep-text {
                columns: 1;
            }
        }

        /* ========== FAQ ========== */
        .faq-section {
            padding: var(--section-gap) 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: #3A3E45;
        }

        .faq-item.active {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        .faq-question {
            width: 100%;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            background: transparent;
            border: none;
            cursor: pointer;
            text-align: left;
            transition: color var(--transition-fast);
            letter-spacing: 0.02em;
        }

        .faq-question:hover {
            color: var(--accent-cyan);
        }

        .faq-icon {
            font-size: 1.1rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-smooth);
            flex-shrink: 0;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
            background: var(--bg-expanded);
            padding: 0 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.8;
            border-top: 1px solid transparent;
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 16px 20px;
            border-top-color: var(--border-color);
        }

        /* ========== CTA SECTION ========== */
        .cta-section {
            padding: var(--section-gap) 0;
            background: var(--bg-secondary);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 229, 255, 0.06) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
            z-index: 1;
        }

        .cta-inner {
            position: relative;
            z-index: 2;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 48px 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 36px;
            align-items: center;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-fast);
        }

        .cta-inner:hover {
            border-color: #3A3E45;
            box-shadow: var(--shadow-hover);
        }

        .cta-text {
            flex: 1;
            min-width: 260px;
        }

        .cta-text h3 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 8px;
            letter-spacing: 0.02em;
        }

        .cta-text p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .cta-form {
            flex: 0 0 380px;
            min-width: 300px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .cta-form input {
            width: 100%;
            padding: 13px 16px;
            background: var(--bg-input);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            color: var(--text-primary);
            transition: all var(--transition-fast);
        }

        .cta-form input:focus {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 0 3px rgba(0, 229, 255, 0.08);
            outline: none;
        }

        .cta-form input::placeholder {
            color: var(--text-muted);
        }

        .cta-form .btn-primary {
            width: 100%;
            justify-content: center;
            padding: 14px;
            font-size: 0.95rem;
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: #06090D;
            border-top: 1px solid var(--border-color);
            padding: 32px 0;
            margin-top: 0;
        }

        .footer-grid {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 24px;
            align-items: flex-start;
        }

        .footer-left {
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-brand {
            font-size: 1.1rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.03em;
        }

        .footer-info {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        .footer-info span {
            white-space: nowrap;
        }

        .footer-right {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            align-items: center;
        }

        .footer-right a {
            font-size: 0.8rem;
            color: var(--text-muted);
            transition: color var(--transition-fast);
            white-space: nowrap;
        }

        .footer-right a:hover {
            color: var(--accent-cyan);
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            :root {
                --section-gap: 70px;
                --sidebar-width: 0;
            }
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .topbar {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: var(--topbar-height);
            }
            .hero-news {
                padding: 40px 0 50px;
                min-height: auto;
            }
            .hero-news .container-wide {
                flex-direction: column;
                gap: 32px;
            }
            .hero-news-right {
                flex: 0 0 auto;
                width: 100%;
                min-width: auto;
            }
            .hero-news-right .hero-img-card img {
                height: 200px;
            }
            .hero-news-left h1 {
                font-size: 2rem;
            }
            .headline-card .headline-img {
                flex: 0 0 100%;
                min-width: auto;
            }
            .headline-card .headline-img img {
                min-height: 220px;
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-inner {
                padding: 32px 24px;
            }
            .cta-form {
                flex: 0 0 100%;
                min-width: auto;
            }
            .container-wide,
            .container-narrow {
                padding: 0 20px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-gap: 50px;
            }
            .hero-news-left h1 {
                font-size: 1.6rem;
            }
            .hero-news-left .hero-badge-row {
                gap: 10px;
            }
            .hero-badge-item {
                padding: 10px 14px;
                min-width: 65px;
            }
            .hero-badge-item .badge-num {
                font-size: 1.3rem;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .headline-card .headline-body {
                padding: 20px;
            }
            .headline-body h3 {
                font-size: 1.2rem;
            }
            .timeline-list {
                padding-left: 24px;
            }
            .timeline-item::before {
                left: -32px;
                width: 12px;
                height: 12px;
            }
            .section-title {
                font-size: 1.35rem;
            }
            .cta-inner {
                padding: 24px 18px;
                gap: 20px;
            }
            .cta-text h3 {
                font-size: 1.2rem;
            }
            .footer-grid {
                flex-direction: column;
                gap: 16px;
            }
            .footer-info {
                flex-direction: column;
                gap: 4px;
            }
            .container-wide,
            .container-narrow {
                padding: 0 16px;
            }
            .faq-question {
                font-size: 0.9rem;
                padding: 15px 16px;
            }
            .faq-answer {
                font-size: 0.82rem;
            }
            .faq-item.active .faq-answer {
                padding: 12px 16px;
            }
            .deep-content-block h3 {
                font-size: 1.15rem;
            }
            .deep-content-block .deep-text {
                font-size: 0.85rem;
            }
        }

        @media (max-width: 520px) {
            .hero-news-left h1 {
                font-size: 1.35rem;
            }
            .hero-news-left .hero-subtitle {
                font-size: 0.85rem;
            }
            .btn-primary,
            .btn-outline {
                padding: 11px 18px;
                font-size: 0.8rem;
            }
            .hero-badge-item {
                padding: 8px 10px;
                min-width: 55px;
            }
            .hero-badge-item .badge-num {
                font-size: 1.1rem;
            }
            .hero-badge-item .badge-label {
                font-size: 0.65rem;
            }
            .hero-news-right .hero-img-card img {
                height: 160px;
            }
            .section-title {
                font-size: 1.2rem;
            }
            .headline-body h3 {
                font-size: 1.05rem;
            }
            .timeline-item h4 {
                font-size: 0.95rem;
            }
            .news-grid-card .grid-card-img {
                height: 150px;
            }
            .grid-card-body h4 {
                font-size: 0.9rem;
            }
        }