/* roulang page: index */
:root {
            --bg-base: #08090d;
            --bg-deep: #10131c;
            --bg-surface: rgba(22, 27, 46, 0.78);
            --bg-surface-hover: rgba(30, 37, 62, 0.9);
            --brand-purple: #8a2be2;
            --brand-purple-light: #a855f7;
            --neon-cyan: #00f5d4;
            --neon-red: #ff0055;
            --text-main: #f1f5f9;
            --text-muted: #94a3b8;
            --border-glow: rgba(138, 43, 226, 0.28);
            --border-cyan-glow: rgba(0, 245, 212, 0.35);
            --card-radius: 8px;
            --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
        }

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

        body {
            background-color: var(--bg-base);
            background-image: radial-gradient(circle at 15% 15%, rgba(138, 43, 226, 0.12) 0%, transparent 40%),
                              radial-gradient(circle at 85% 80%, rgba(0, 245, 212, 0.08) 0%, transparent 45%),
                              linear-gradient(180deg, #08090d 0%, #10131c 100%);
            background-attachment: fixed;
            color: var(--text-main);
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            overflow-x: hidden;
            padding-bottom: 70px;
        }

        @media (min-width: 1025px) {
            body { padding-bottom: 0; }
        }

        a {
            color: var(--neon-cyan);
            text-decoration: none;
            transition: var(--transition-smooth);
        }
        a:hover {
            color: var(--brand-purple-light);
        }

        /* Top Sticky Navbar */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(8, 9, 13, 0.88);
            backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-glow);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 14px 0;
        }
        .brand-logo {
            font-size: 1.15rem;
            font-weight: 900;
            letter-spacing: -0.5px;
            color: #ffffff;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .brand-logo i {
            color: var(--neon-cyan);
            filter: drop-shadow(0 0 8px rgba(0,245,212,0.6));
        }
        .nav-links {
            display: none;
            list-style: none;
            margin: 0;
            gap: 24px;
        }
        @media (min-width: 1025px) {
            .nav-links { display: flex; }
        }
        .nav-links a {
            color: var(--text-muted);
            font-weight: 500;
            font-size: 0.95rem;
            padding: 6px 12px;
            border-radius: 4px;
        }
        .nav-links a:hover, .nav-links a.active {
            color: #ffffff;
            background: rgba(138, 43, 226, 0.2);
            box-shadow: 0 0 12px rgba(138, 43, 226, 0.3);
        }
        .header-action .btn-node-check {
            background: linear-gradient(135deg, var(--brand-purple), #6b11b5);
            color: #fff;
            padding: 8px 18px;
            font-size: 0.88rem;
            font-weight: 700;
            border-radius: 4px;
            border: 1px solid rgba(255,255,255,0.2);
            display: inline-flex;
            align-items: center;
            gap: 8px;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(138, 43, 226, 0.4);
        }
        .header-action .btn-node-check:hover {
            background: linear-gradient(135deg, var(--brand-purple-light), var(--brand-purple));
            box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
            transform: translateY(-1px);
        }

        /* Mobile Bottom Tab Bar */
        .mobile-tab-bar {
            display: flex;
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 64px;
            background: rgba(10, 12, 19, 0.96);
            backdrop-filter: blur(12px);
            border-top: 1px solid var(--border-glow);
            z-index: 1000;
            justify-content: space-around;
            align-items: center;
        }
        @media (min-width: 1025px) {
            .mobile-tab-bar { display: none; }
        }
        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            font-size: 0.72rem;
            color: var(--text-muted);
            gap: 4px;
        }
        .tab-item i {
            font-size: 1.15rem;
        }
        .tab-item.active, .tab-item:hover {
            color: var(--neon-cyan);
            text-shadow: 0 0 8px rgba(0, 245, 212, 0.6);
        }

        /* Common Cyber Badges & HUD elements */
        .hud-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(138, 43, 226, 0.15);
            border: 1px solid var(--border-glow);
            color: var(--brand-purple-light);
            font-size: 0.78rem;
            padding: 4px 10px;
            border-radius: 4px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .hud-pulse {
            width: 8px;
            height: 8px;
            background-color: var(--neon-cyan);
            border-radius: 50%;
            box-shadow: 0 0 8px var(--neon-cyan);
            animation: pulse-glow 1.8s infinite;
        }
        @keyframes pulse-glow {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.2); }
        }

        .section-wrap {
            padding: 65px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.04);
            position: relative;
        }
        .section-header {
            margin-bottom: 40px;
        }
        .section-title {
            font-size: 1.75rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .section-title::before {
            content: "";
            display: inline-block;
            width: 4px;
            height: 24px;
            background: linear-gradient(to bottom, var(--neon-cyan), var(--brand-purple));
            border-radius: 2px;
        }
        .section-desc {
            color: var(--text-muted);
            font-size: 0.95rem;
            max-width: 880px;
            line-height: 1.7;
        }

        .cyber-panel {
            background: var(--bg-surface);
            border: 1px solid var(--border-glow);
            border-radius: var(--card-radius);
            padding: 24px;
            transition: var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .cyber-panel:hover {
            border-color: rgba(0, 245, 212, 0.4);
            box-shadow: 0 0 25px rgba(0, 245, 212, 0.15);
            transform: translateY(-2px);
        }
        .cyber-panel::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--border-glow), transparent);
        }

        /* 1. Hero Section */
        .hero-section {
            padding: 70px 0 50px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 50% 0%, rgba(138, 43, 226, 0.22) 0%, transparent 70%);
        }
        .hero-title {
            font-size: 2.3rem;
            font-weight: 900;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, #ffffff 40%, var(--neon-cyan) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        @media (min-width: 768px) {
            .hero-title { font-size: 3.1rem; }
        }
        .hero-desc {
            color: #cbd5e1;
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 25px;
        }
        .compliance-list {
            list-style: none;
            margin: 0 0 30px 0;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 12px;
        }
        .compliance-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.9rem;
            color: var(--neon-cyan);
            background: rgba(0, 245, 212, 0.05);
            padding: 8px 14px;
            border-radius: 4px;
            border-left: 2px solid var(--neon-cyan);
        }
        .hero-hud-dashboard {
            background: rgba(14, 18, 30, 0.95);
            border: 1px solid var(--border-cyan-glow);
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 0 30px rgba(0, 0, 0, 0.7);
        }
        .hud-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding-bottom: 12px;
            margin-bottom: 16px;
        }
        .hud-stat-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }
        .hud-stat-box {
            background: rgba(22, 27, 46, 0.6);
            border: 1px solid rgba(255,255,255,0.05);
            padding: 12px;
            border-radius: 4px;
        }
        .hud-stat-val {
            font-size: 1.35rem;
            font-family: monospace;
            font-weight: 700;
            color: var(--neon-cyan);
        }
        .hud-stat-lbl {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* Button styling */
        .btn-neon-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--neon-cyan), #00ba9f);
            color: #08090d;
            font-weight: 800;
            font-size: 0.95rem;
            padding: 12px 28px;
            border-radius: 4px;
            box-shadow: 0 0 20px rgba(0, 245, 212, 0.35);
            transition: var(--transition-smooth);
            border: none;
            cursor: pointer;
        }
        .btn-neon-primary:hover {
            background: #ffffff;
            color: #08090d;
            box-shadow: 0 0 30px rgba(0, 245, 212, 0.65);
            transform: translateY(-2px);
        }

        /* 2. Metrics HUD */
        .metric-card {
            text-align: center;
            padding: 28px 16px;
        }
        .metric-num {
            font-size: 2.4rem;
            font-family: monospace;
            font-weight: 900;
            color: #ffffff;
            margin-bottom: 6px;
            text-shadow: 0 0 15px rgba(168, 85, 247, 0.5);
        }
        .metric-title {
            color: var(--neon-cyan);
            font-size: 0.9rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .metric-desc {
            color: var(--text-muted);
            font-size: 0.8rem;
            line-height: 1.5;
        }

        /* 3. Service Matrix */
        .service-box {
            height: 100%;
            display: flex;
            flex-direction: column;
        }
        .service-icon {
            font-size: 1.8rem;
            color: var(--brand-purple-light);
            margin-bottom: 14px;
        }
        .service-box h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 8px;
        }
        .service-box p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 4. Performance Benchmark */
        .benchmark-table-wrap {
            background: rgba(14, 18, 30, 0.9);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            overflow: hidden;
        }
        .benchmark-table {
            width: 100%;
            border-collapse: collapse;
            margin: 0;
            color: var(--text-main);
        }
        .benchmark-table th {
            background: rgba(138, 43, 226, 0.25);
            color: #ffffff;
            padding: 14px 18px;
            font-size: 0.95rem;
            text-align: left;
            border-bottom: 1px solid var(--border-glow);
        }
        .benchmark-table td {
            padding: 14px 18px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.9rem;
        }
        .benchmark-table tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }
        .badge-optimal {
            color: var(--neon-cyan);
            font-weight: 700;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .badge-slow {
            color: #64748b;
        }

        /* 5. Timeline */
        .timeline-step {
            position: relative;
            padding-left: 28px;
            margin-bottom: 24px;
            border-left: 2px solid rgba(138, 43, 226, 0.3);
        }
        .timeline-step::before {
            content: "";
            position: absolute;
            left: -7px;
            top: 4px;
            width: 12px;
            height: 12px;
            background: var(--brand-purple-light);
            border-radius: 50%;
            box-shadow: 0 0 10px var(--brand-purple-light);
        }
        .timeline-date {
            font-size: 0.8rem;
            color: var(--neon-cyan);
            font-family: monospace;
            font-weight: 700;
        }
        .timeline-step h4 {
            font-size: 1.05rem;
            color: #ffffff;
            margin: 4px 0 6px;
        }
        .timeline-step p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* 6. Showcase Grid */
        .showcase-card {
            background: var(--bg-surface);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition-smooth);
            height: 100%;
        }
        .showcase-card:hover {
            border-color: var(--neon-cyan);
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.6);
        }
        .showcase-thumb-box {
            position: relative;
            background: #141724;
            height: 160px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
        }
        .showcase-thumb-box i {
            font-size: 2.8rem;
            color: rgba(168, 85, 247, 0.4);
            transition: var(--transition-smooth);
        }
        .showcase-card:hover .showcase-thumb-box i {
            color: var(--neon-cyan);
            transform: scale(1.1);
        }
        .showcase-spec {
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(8, 9, 13, 0.85);
            color: var(--neon-cyan);
            font-size: 0.72rem;
            font-family: monospace;
            padding: 2px 8px;
            border-radius: 4px;
            border: 1px solid var(--border-cyan-glow);
        }
        .showcase-body {
            padding: 18px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .showcase-body h4 {
            font-size: 1.05rem;
            color: #ffffff;
            margin-bottom: 8px;
            font-weight: 700;
        }
        .showcase-body p {
            color: var(--text-muted);
            font-size: 0.85rem;
            line-height: 1.6;
            margin-bottom: 14px;
            flex-grow: 1;
        }
        .showcase-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.78rem;
            color: #64748b;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding-top: 10px;
        }

        /* 7. Curated Scenarios */
        .scenario-box {
            background: linear-gradient(145deg, rgba(22, 27, 46, 0.75), rgba(16, 19, 28, 0.95));
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            padding: 24px;
            height: 100%;
        }
        .scenario-tag {
            font-size: 0.75rem;
            color: var(--neon-cyan);
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }
        .scenario-box h3 {
            font-size: 1.15rem;
            color: #ffffff;
            margin-bottom: 10px;
        }
        .scenario-box p {
            color: var(--text-muted);
            font-size: 0.88rem;
            line-height: 1.6;
        }

        /* 8. News & Updates */
        .news-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            padding: 16px;
            background: rgba(18, 22, 36, 0.6);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: 6px;
            margin-bottom: 12px;
            transition: var(--transition-smooth);
        }
        .news-item:hover {
            border-color: var(--border-glow);
            background: rgba(22, 27, 46, 0.8);
        }
        .news-badge {
            flex-shrink: 0;
            background: rgba(168, 85, 247, 0.15);
            color: var(--brand-purple-light);
            border: 1px solid var(--border-glow);
            padding: 4px 10px;
            font-size: 0.75rem;
            border-radius: 4px;
            font-family: monospace;
        }
        .news-content h4 {
            font-size: 0.98rem;
            color: #ffffff;
            margin-bottom: 4px;
        }
        .news-content p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 0;
        }

        /* 9. Multi-Device Ecosystem */
        .device-card {
            text-align: center;
            padding: 24px 16px;
            background: var(--bg-surface);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            height: 100%;
        }
        .device-icon {
            font-size: 2.2rem;
            color: var(--neon-cyan);
            margin-bottom: 14px;
        }
        .device-card h4 {
            font-size: 1.05rem;
            color: #ffffff;
            margin-bottom: 8px;
        }
        .device-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 0;
        }

        /* 10. SLA & Security */
        .security-card {
            background: rgba(15, 20, 32, 0.85);
            border-left: 3px solid var(--neon-cyan);
            padding: 20px;
            border-radius: 0 8px 8px 0;
            height: 100%;
        }
        .security-card h4 {
            font-size: 1.1rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .security-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 11. Quick Diagnostics */
        .diag-box {
            background: var(--bg-surface);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            padding: 20px;
            height: 100%;
        }
        .diag-step-num {
            display: inline-block;
            width: 28px;
            height: 28px;
            line-height: 28px;
            text-align: center;
            background: var(--brand-purple);
            color: #fff;
            border-radius: 50%;
            font-weight: 700;
            font-size: 0.85rem;
            margin-bottom: 12px;
        }
        .diag-box h4 {
            font-size: 1.05rem;
            color: #fff;
            margin-bottom: 8px;
        }
        .diag-box p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 0;
        }

        /* 12. FAQ Accordion */
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-glow);
            border-radius: 8px;
            margin-bottom: 14px;
            overflow: hidden;
        }
        .faq-question {
            padding: 18px 24px;
            font-size: 1.05rem;
            font-weight: 700;
            color: #ffffff;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            background: rgba(255, 255, 255, 0.02);
        }
        .faq-question i {
            color: var(--neon-cyan);
            font-size: 0.9rem;
            transition: var(--transition-smooth);
        }
        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
            padding-top: 14px;
        }

        /* 13. Feedback & Conversion Console */
        .console-wrap {
            background: rgba(14, 18, 30, 0.95);
            border: 1px solid var(--border-cyan-glow);
            border-radius: 8px;
            padding: 35px;
            box-shadow: 0 0 35px rgba(0, 0, 0, 0.7);
        }
        .form-control-cyber {
            width: 100%;
            background: rgba(8, 9, 13, 0.8);
            border: 1px solid var(--border-glow);
            border-radius: 4px;
            padding: 12px 16px;
            color: #ffffff;
            font-size: 0.9rem;
            margin-bottom: 16px;
            outline: none;
            transition: var(--transition-smooth);
        }
        .form-control-cyber:focus {
            border-color: var(--neon-cyan);
            box-shadow: 0 0 10px rgba(0, 245, 212, 0.3);
            background: rgba(12, 15, 24, 0.95);
        }

        /* Footer */
        .site-footer {
            background: #050608;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 50px 0 30px;
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-brand {
            font-size: 1.2rem;
            font-weight: 800;
            color: #ffffff;
            margin-bottom: 14px;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .footer-desc {
            line-height: 1.7;
            margin-bottom: 20px;
        }
        .footer-links {
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: var(--text-muted);
            font-size: 0.88rem;
        }
        .footer-links a:hover {
            color: var(--neon-cyan);
        }
        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            text-align: center;
            font-size: 0.8rem;
            color: #64748b;
        }

/* roulang page: category1 */
:root {
        --bg-base: #08090d;
        --bg-deep: #10131c;
        --bg-surface: rgba(22, 27, 46, 0.78);
        --bg-surface-hover: rgba(30, 37, 62, 0.9);
        --brand-purple: #8a2be2;
        --brand-purple-light: #a855f7;
        --neon-cyan: #00f5d4;
        --neon-red: #ff0055;
        --text-main: #f1f5f9;
        --text-muted: #94a3b8;
        --border-glow: rgba(138, 43, 226, 0.28);
        --border-cyan-glow: rgba(0, 245, 212, 0.35);
        --card-radius: 8px;
        --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    * { box-sizing: border-box; }
    body {
        background-color: var(--bg-base);
        background-image: radial-gradient(circle at 15% 15%, rgba(138, 43, 226, 0.12) 0%, transparent 40%),
                          radial-gradient(circle at 85% 80%, rgba(0, 245, 212, 0.08) 0%, transparent 45%),
                          linear-gradient(180deg, #08090d 0%, #10131c 100%);
        background-attachment: fixed;
        color: var(--text-main);
        font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
        line-height: 1.6;
        margin: 0;
        padding-bottom: 70px;
    }
    @media (min-width: 1025px) {
        body { padding-bottom: 0; }
    }
    a {
        color: var(--neon-cyan);
        text-decoration: none;
        transition: var(--transition-smooth);
    }
    a:hover {
        color: var(--brand-purple-light);
    }
    
    /* Top Sticky Navbar */
    .site-header {
        position: sticky;
        top: 0;
        z-index: 1000;
        background: rgba(8, 9, 13, 0.88);
        backdrop-filter: blur(14px);
        border-bottom: 1px solid var(--border-glow);
    }
    .header-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 14px 0;
    }
    .brand-logo {
        font-size: 1.15rem;
        font-weight: 900;
        letter-spacing: -0.5px;
        color: #ffffff;
        display: inline-flex;
        align-items: center;
        gap: 10px;
    }
    .brand-logo i {
        color: var(--neon-cyan);
        filter: drop-shadow(0 0 8px rgba(0,245,212,0.6));
    }
    .nav-links {
        display: none;
        list-style: none;
        margin: 0;
        gap: 20px;
    }
    @media (min-width: 1025px) {
        .nav-links { display: flex; }
    }
    .nav-links a {
        color: var(--text-muted);
        font-weight: 500;
        font-size: 0.92rem;
        padding: 6px 12px;
        border-radius: 4px;
    }
    .nav-links a:hover, .nav-links a.active {
        color: #ffffff;
        background: rgba(138, 43, 226, 0.2);
        box-shadow: 0 0 12px rgba(138, 43, 226, 0.3);
    }
    .header-action .btn-node-check {
        background: linear-gradient(135deg, var(--brand-purple), #6b11b5);
        color: #fff;
        padding: 8px 18px;
        font-size: 0.88rem;
        font-weight: 700;
        border-radius: 4px;
        border: 1px solid rgba(255,255,255,0.2);
        display: inline-flex;
        align-items: center;
        gap: 8px;
        cursor: pointer;
        box-shadow: 0 0 15px rgba(138, 43, 226, 0.4);
        transition: var(--transition-smooth);
    }
    .header-action .btn-node-check:hover {
        background: linear-gradient(135deg, var(--brand-purple-light), var(--brand-purple));
        box-shadow: 0 0 20px rgba(168, 85, 247, 0.6);
        transform: translateY(-1px);
    }

    /* Mobile Bottom Tab Bar */
    .mobile-tab-bar {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        width: 100%;
        height: 64px;
        background: rgba(10, 12, 19, 0.96);
        backdrop-filter: blur(12px);
        border-top: 1px solid var(--border-glow);
        z-index: 1000;
        justify-content: space-around;
        align-items: center;
    }
    @media (min-width: 1025px) {
        .mobile-tab-bar { display: none; }
    }
    .tab-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        font-size: 0.72rem;
        color: var(--text-muted);
        gap: 4px;
    }
    .tab-item i {
        font-size: 1.15rem;
    }
    .tab-item.active, .tab-item:hover {
        color: var(--neon-cyan);
        text-shadow: 0 0 8px rgba(0, 245, 212, 0.6);
    }

    /* Universal Cyber Badges & HUD elements */
    .hud-badge {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: rgba(138, 43, 226, 0.15);
        border: 1px solid var(--border-glow);
        color: var(--brand-purple-light);
        font-size: 0.78rem;
        padding: 4px 10px;
        border-radius: 4px;
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }
    .hud-badge.live {
        background: rgba(255, 0, 85, 0.15);
        border-color: rgba(255, 0, 85, 0.4);
        color: #ff4d88;
    }
    .pulse-dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background-color: var(--neon-red);
        box-shadow: 0 0 8px var(--neon-red);
        animation: pulse 1.6s infinite;
    }
    .pulse-cyan-dot {
        width: 7px;
        height: 7px;
        border-radius: 50%;
        background-color: var(--neon-cyan);
        box-shadow: 0 0 8px var(--neon-cyan);
        animation: pulse 1.6s infinite;
    }
    @keyframes pulse {
        0% { transform: scale(0.9); opacity: 0.7; }
        50% { transform: scale(1.3); opacity: 1; }
        100% { transform: scale(0.9); opacity: 0.7; }
    }

    .section-wrap {
        padding: 50px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.04);
        position: relative;
    }
    .section-header {
        margin-bottom: 28px;
    }
    .section-title {
        font-size: 1.6rem;
        font-weight: 800;
        color: #ffffff;
        margin-bottom: 8px;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .section-title::before {
        content: "";
        display: inline-block;
        width: 4px;
        height: 22px;
        background: linear-gradient(to bottom, var(--neon-cyan), var(--brand-purple));
        border-radius: 2px;
    }
    .section-desc {
        color: var(--text-muted);
        font-size: 0.92rem;
        max-width: 880px;
        line-height: 1.6;
        margin-bottom: 0;
    }

    /* 1. Category Compact Header */
    .category-header-wrap {
        padding: 40px 0 28px;
        background: linear-gradient(180deg, rgba(138, 43, 226, 0.12) 0%, rgba(8, 9, 13, 0) 100%);
        border-bottom: 1px solid var(--border-glow);
    }
    .cat-h1 {
        font-size: 2rem;
        font-weight: 900;
        color: #ffffff;
        margin-bottom: 12px;
        letter-spacing: -0.5px;
    }
    .cat-h1 span {
        background: linear-gradient(135deg, #ffffff 30%, var(--neon-cyan) 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
    }
    .cat-metrics-bar {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        margin-top: 20px;
    }
    .cat-metric-pill {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        padding: 10px 18px;
        border-radius: 6px;
        display: inline-flex;
        align-items: center;
        gap: 12px;
    }
    .cat-metric-val {
        font-family: "Courier New", Courier, monospace;
        font-size: 1.25rem;
        font-weight: 800;
        color: var(--neon-cyan);
    }
    .cat-metric-label {
        font-size: 0.78rem;
        color: var(--text-muted);
        text-transform: uppercase;
        letter-spacing: 0.5px;
    }

    /* 2. Multi-Filter Console */
    .filter-console {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        border-radius: var(--card-radius);
        padding: 24px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    }
    .filter-row {
        display: flex;
        align-items: center;
        flex-wrap: wrap;
        padding: 10px 0;
        border-bottom: 1px dashed rgba(255, 255, 255, 0.08);
    }
    .filter-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .filter-label {
        width: 100px;
        font-size: 0.85rem;
        font-weight: 700;
        color: var(--text-muted);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .filter-label i {
        color: var(--brand-purple-light);
        font-size: 0.8rem;
    }
    .filter-tags {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        flex: 1;
    }
    .filter-btn {
        background: rgba(255, 255, 255, 0.04);
        border: 1px solid rgba(255, 255, 255, 0.08);
        color: #cbd5e1;
        font-size: 0.82rem;
        padding: 5px 14px;
        border-radius: 4px;
        cursor: pointer;
        transition: var(--transition-smooth);
    }
    .filter-btn:hover {
        border-color: var(--border-cyan-glow);
        color: var(--neon-cyan);
    }
    .filter-btn.active {
        background: rgba(0, 245, 212, 0.15);
        border-color: var(--neon-cyan);
        color: var(--neon-cyan);
        box-shadow: 0 0 10px rgba(0, 245, 212, 0.3);
        font-weight: 600;
    }

    /* 3. Video Grid Cards */
    .video-card {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        border-radius: var(--card-radius);
        overflow: hidden;
        transition: var(--transition-smooth);
        display: flex;
        flex-direction: column;
        height: 100%;
        position: relative;
    }
    .video-card:hover {
        transform: translateY(-4px);
        border-color: var(--neon-cyan);
        box-shadow: 0 12px 30px rgba(0, 245, 212, 0.2);
    }
    .video-thumb-box {
        position: relative;
        width: 100%;
        padding-top: 56.25%;
        background: #0f121d;
        overflow: hidden;
    }
    .video-thumb-placeholder {
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        display: flex;
        align-items: center;
        justify-content: center;
        background: radial-gradient(circle at center, #1e243a 0%, #0d101a 100%);
    }
    .thumb-glow-icon {
        font-size: 2.2rem;
        color: rgba(138, 43, 226, 0.4);
        transition: var(--transition-smooth);
    }
    .video-card:hover .thumb-glow-icon {
        color: var(--neon-cyan);
        transform: scale(1.15);
        filter: drop-shadow(0 0 10px var(--neon-cyan));
    }
    .badge-top-left {
        position: absolute;
        top: 10px;
        left: 10px;
        z-index: 2;
    }
    .badge-top-right {
        position: absolute;
        top: 10px;
        right: 10px;
        background: rgba(0, 0, 0, 0.75);
        border: 1px solid rgba(0, 245, 212, 0.4);
        color: var(--neon-cyan);
        font-size: 0.72rem;
        padding: 3px 8px;
        border-radius: 4px;
        font-family: monospace;
        z-index: 2;
    }
    .badge-bottom-right {
        position: absolute;
        bottom: 8px;
        right: 8px;
        background: rgba(0, 0, 0, 0.85);
        color: #fff;
        font-size: 0.72rem;
        padding: 2px 6px;
        border-radius: 3px;
        font-family: monospace;
    }
    .video-content {
        padding: 16px;
        display: flex;
        flex-direction: column;
        flex: 1;
    }
    .video-title {
        font-size: 1rem;
        font-weight: 700;
        color: #ffffff;
        margin-bottom: 8px;
        line-height: 1.4;
    }
    .video-specs-meta {
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 0.78rem;
        color: var(--text-muted);
        margin-bottom: 12px;
    }
    .video-specs-meta span i {
        color: var(--brand-purple-light);
        margin-right: 4px;
    }
    .video-footer-bar {
        margin-top: auto;
        padding-top: 12px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .btn-play-trigger {
        background: rgba(138, 43, 226, 0.2);
        border: 1px solid var(--border-glow);
        color: #fff;
        padding: 6px 14px;
        font-size: 0.78rem;
        font-weight: 600;
        border-radius: 4px;
        cursor: pointer;
        display: inline-flex;
        align-items: center;
        gap: 6px;
        transition: var(--transition-smooth);
    }
    .btn-play-trigger:hover {
        background: var(--brand-purple);
        box-shadow: 0 0 10px var(--brand-purple);
    }
    .bitrate-flag {
        font-size: 0.75rem;
        font-family: monospace;
        color: var(--neon-cyan);
    }

    /* 4. Pagination & Status Terminal */
    .pagination-terminal {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        border-radius: var(--card-radius);
        padding: 20px 24px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
    }
    .pager-controls {
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .pager-btn {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.12);
        color: var(--text-main);
        padding: 7px 14px;
        border-radius: 4px;
        font-size: 0.85rem;
        cursor: pointer;
        transition: var(--transition-smooth);
    }
    .pager-btn:hover {
        border-color: var(--neon-cyan);
        color: var(--neon-cyan);
    }
    .pager-btn.active {
        background: var(--brand-purple);
        border-color: var(--brand-purple-light);
        color: #fff;
        font-weight: 700;
        box-shadow: 0 0 10px rgba(138, 43, 226, 0.5);
    }
    .pager-status {
        display: flex;
        align-items: center;
        gap: 16px;
        font-size: 0.85rem;
        color: var(--text-muted);
    }
    .node-latency-pill {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        font-family: monospace;
        background: rgba(0, 0, 0, 0.4);
        padding: 4px 10px;
        border-radius: 4px;
        border: 1px solid rgba(0, 245, 212, 0.2);
    }

    /* 5. Deep Technical Overview */
    .tech-panel {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        border-radius: var(--card-radius);
        padding: 30px;
        height: 100%;
    }
    .tech-subtitle {
        font-size: 1.18rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .tech-subtitle i {
        color: var(--neon-cyan);
    }
    .tech-panel p {
        font-size: 0.9rem;
        line-height: 1.75;
        color: var(--text-muted);
        margin-bottom: 16px;
    }
    .tech-params-list {
        list-style: none;        margin: 0;
        padding: 0;
    }
    .tech-params-list li {
        display: flex;
        justify-content: space-between;
        padding: 8px 0;
        border-bottom: 1px solid rgba(255, 255, 255, 0.05);
        font-size: 0.85rem;
    }
    .tech-params-list li span:first-child {
        color: var(--text-muted);
    }
    .tech-params-list li span:last-child {
        color: var(--neon-cyan);
        font-family: monospace;
        font-weight: 600;
    }

    /* 6. Tag Matrix */
    .tag-cloud-wrap {
        display: flex;
        flex-wrap: wrap;
        gap: 12px;
    }
    .tag-chip {
        background: rgba(22, 27, 46, 0.9);
        border: 1px solid var(--border-glow);
        padding: 8px 16px;
        border-radius: 4px;
        font-size: 0.84rem;
        color: #e2e8f0;
        display: inline-flex;
        align-items: center;
        gap: 8px;
        transition: var(--transition-smooth);
    }
    .tag-chip i {
        color: var(--brand-purple-light);
        font-size: 0.8rem;
    }
    .tag-chip:hover {
        border-color: var(--neon-cyan);
        color: var(--neon-cyan);
        transform: translateY(-2px);
        box-shadow: 0 4px 14px rgba(0, 245, 212, 0.2);
    }

    /* 7. Category FAQ Accordion */
    .faq-accordion-item {
        background: var(--bg-surface);
        border: 1px solid var(--border-glow);
        border-radius: var(--card-radius);
        margin-bottom: 14px;
        overflow: hidden;
    }
    .faq-q {
        padding: 18px 24px;
        font-size: 1rem;
        font-weight: 700;
        color: #ffffff;
        display: flex;
        justify-content: space-between;
        align-items: center;
        cursor: pointer;
        user-select: none;
    }
    .faq-q i {
        color: var(--neon-cyan);
        transition: var(--transition-smooth);
    }
    .faq-a {
        padding: 0 24px 18px;
        font-size: 0.9rem;
        color: var(--text-muted);
        line-height: 1.7;
    }

    /* Footer Styles */
    .site-footer {
        background: #06070a;
        border-top: 1px solid var(--border-glow);
        padding: 60px 0 25px;
        position: relative;
    }
    .footer-brand {
        font-size: 1.15rem;
        font-weight: 800;
        color: #fff;
        margin-bottom: 14px;
        display: flex;
        align-items: center;
        gap: 8px;
    }
    .footer-desc {
        font-size: 0.84rem;
        color: var(--text-muted);
        line-height: 1.7;
    }
    .footer-links {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .footer-links li {
        margin-bottom: 8px;
    }
    .footer-links a {
        color: var(--text-muted);
        font-size: 0.84rem;
    }
    .footer-links a:hover {
        color: var(--neon-cyan);
        padding-left: 4px;
    }
    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.05);
        margin-top: 40px;
        padding-top: 20px;
        text-align: center;
        font-size: 0.78rem;
        color: #64748b;
    }