/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.25s ease;
        }
        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }
        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }
        /* Hero */
        .hero-section {
            padding-top: 140px;
            padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 85vh;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.85) 0%, rgba(8,9,15,0.7) 60%, rgba(8,9,15,0.95) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 24px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-neon);
            margin-bottom: 24px;
        }
        .hero-badge i {
            font-size: 0.75rem;
            animation: pulse-dot 1.5s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.3); }
        }
        .hero-title {
            font-size: clamp(2.5rem, 5vw, 3.8rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 8px 25px rgba(0, 82, 255, 0.5);
            transition: all 0.3s ease;
            border: 1px solid rgba(0, 240, 255, 0.3);
        }
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 30px rgba(0, 240, 255, 0.6);
        }
        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.25);
            transition: all 0.3s ease;
        }
        .btn-ghost:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.2);
        }
        /* Section common */
        .section {
            padding: var(--space-section) 0;
        }
        .section-header {
            margin-bottom: 48px;
        }
        .section-label {
            display: inline-block;
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-neon);
            margin-bottom: 12px;
        }
        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 12px;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 600px;
            line-height: 1.65;
        }
        /* Vertical cards */
        .vertical-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 20px;
        }
        .vertical-card {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all 0.35s ease;
            cursor: pointer;
            display: flex;
            flex-direction: column;
        }
        .vertical-card:hover {
            transform: translateY(-6px);
            border-color: var(--border-glow);
            box-shadow: var(--shadow-neon);
        }
        .vertical-card img {
            width: 100%;
            height: 240px;
            object-fit: cover;
        }
        .vertical-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .vertical-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.35;
        }
        .vertical-card-body p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
            flex: 1;
        }
        .vertical-card-body .card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 14px;
            font-weight: 600;
            font-size: 0.9rem;
            color: var(--accent-neon);
            transition: gap 0.2s ease;
        }
        .vertical-card-body .card-link:hover {
            gap: 10px;
        }
        /* Hot list */
        .hot-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.05);
            border-radius: var(--radius-md);
            transition: all 0.3s ease;
        }
        .hot-item:hover {
            border-color: var(--border-glow);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.15);
            transform: translateX(4px);
        }
        .hot-rank {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-electric), var(--accent-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
        }
        .hot-info h4 {
            font-weight: 700;
            margin-bottom: 2px;
        }
        .hot-info span {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* Data block */
        .data-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
        }
        .data-card {
            background: var(--bg-card);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            text-align: left;
            transition: all 0.3s ease;
        }
        .data-card:hover {
            border-color: var(--accent-neon);
            box-shadow: var(--shadow-neon);
        }
        .data-icon {
            font-size: 2.2rem;
            color: var(--accent-neon);
            margin-bottom: 14px;
        }
        .data-number {
            font-size: 2.4rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 4px;
        }
        .data-label {
            font-size: 0.9rem;
            color: var(--text-secondary);
        }
        /* Review wall */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }
        .review-card {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all 0.3s ease;
        }
        .review-card:hover {
            border-color: var(--border-glow);
            box-shadow: 0 8px 25px rgba(0, 82, 255, 0.2);
        }
        .review-stars {
            color: #FFD700;
            margin-bottom: 12px;
            font-size: 0.95rem;
        }
        .review-text {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
            font-style: italic;
        }
        .review-author {
            font-weight: 700;
            font-size: 0.9rem;
        }
        /* Guide block */
        .guide-steps {
            display: flex;
            flex-direction: column;
            gap: 20px;
            max-width: 700px;
        }
        .guide-step {
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }
        .step-num {
            flex-shrink: 0;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-electric), var(--accent-neon));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
        }
        .step-content h4 {
            font-weight: 700;
            margin-bottom: 4px;
        }
        .step-content p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }
        /* FAQ */
        .faq-list {
            max-width: 720px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all 0.25s ease;
        }
        .faq-item:hover {
            border-color: var(--border-glow);
        }
        .faq-question {
            padding: 18px 24px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 1rem;
        }
        .faq-answer {
            padding: 0 24px 18px;
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        /* CTA bar */
        .cta-sticky {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 90;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 14px 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .cta-sticky .btn-primary {
            padding: 12px 28px;
            font-size: 0.95rem;
        }
        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(255,255,255,0.06);
            padding: 40px 0 100px;
            text-align: center;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 20px;
        }
        .footer-links a {
            font-size: 0.9rem;
            color: var(--text-muted);
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--accent-neon);
        }
        .footer-copy {
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        /* FAB */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 100px;
            z-index: 85;
            width: 52px;
            height: 52px;
            border-radius: 28px;
            background: rgba(8,9,15,0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-neon);
            font-size: 1.4rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            animation: fab-float 3s ease-in-out infinite;
        }
        .fab-left::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 28px;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            z-index: -1;
            opacity: 0.6;
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.7);
        }
        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links a {
                padding: 8px 10px;
                font-size: 0.82rem;
            }
            .nav-logo {
                font-size: 0.95rem;
                max-width: 220px;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8,9,15,0.98);
                backdrop-filter: blur(20px);
                padding: 16px 24px;
                gap: 8px;
                border-bottom: 1px solid rgba(0,82,255,0.2);
            }
            .hero-section {
                padding-top: 100px;
                min-height: 70vh;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .vertical-grid {
                grid-template-columns: 1fr;
            }
            .review-grid {
                grid-template-columns: 1fr;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-sticky {
                flex-direction: column;
                text-align: center;
                gap: 10px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .btn-primary, .btn-ghost {
                padding: 12px 20px;
                font-size: 0.9rem;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 6px 14px;
                font-size: 0.82rem;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.25s ease;
        }
        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }
        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: all 0.3s ease;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.6);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-neon);
            background: transparent;
            border: 1px solid var(--accent-neon);
            transition: all 0.3s ease;
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-neon);
        }
        .article-page {
            padding-top: 120px;
            padding-bottom: var(--space-section);
        }
        .article-hero-banner {
            width: 100%;
            height: 380px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            border-radius: var(--radius-lg);
            margin-bottom: 32px;
            position: relative;
            overflow: hidden;
        }
        .article-hero-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(0deg, rgba(8,9,15,0.9) 0%, rgba(8,9,15,0.2) 70%);
        }
        .article-meta-bar {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--border-glow);
            margin-bottom: 32px;
        }
        .article-category-tag {
            padding: 6px 16px;
            border-radius: 20px;
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid var(--accent-neon);
            color: var(--accent-neon);
            font-size: 0.85rem;
            font-weight: 600;
        }
        .article-date {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .article-pull-quote {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border-left: 4px solid var(--accent-electric);
            padding: 28px 32px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-size: 1.2rem;
            font-style: italic;
            color: var(--text-secondary);
            margin-bottom: 36px;
            box-shadow: 0 4px 15px rgba(0,0,0,0.3);
        }
        .article-content-body {
            font-size: 1rem;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 820px;
        }
        .article-content-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 36px 0 16px 0;
        }
        .article-content-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: var(--accent-neon);
            margin: 28px 0 12px 0;
        }
        .article-content-body p {
            margin-bottom: 18px;
        }
        .article-content-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
        }
        .article-content-body ul, .article-content-body ol {
            margin: 16px 0 16px 20px;
            padding-left: 0;
        }
        .article-content-body li {
            margin-bottom: 8px;
        }
        .article-cta-banner {
            background: linear-gradient(135deg, rgba(0,82,255,0.2), rgba(0,240,255,0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-top: 48px;
            text-align: center;
        }
        .article-cta-banner h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .article-cta-banner p {
            color: var(--text-secondary);
            margin-bottom: 24px;
        }
        .not-found-message {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 80px 40px;
            text-align: center;
            border: 1px solid var(--border-glow);
        }
        .not-found-message h2 {
            font-size: 2rem;
            color: var(--accent-neon);
            margin-bottom: 16px;
        }
        .not-found-message p {
            color: var(--text-secondary);
            margin-bottom: 28px;
        }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 48px 0 24px;
            margin-top: var(--space-section);
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 28px;
            margin-bottom: 20px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--accent-neon);
        }
        .footer-copy {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        .fab-container {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
        }
        .fab-button {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #0D111E, #08090F);
            border: 2px solid transparent;
            background-clip: padding-box;
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.6rem;
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.4);
            transition: all 0.3s ease;
            opacity: 0.7;
            animation: fab-float 3s ease-in-out infinite;
        }
        .fab-button::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1;
            opacity: 0.6;
            transition: opacity 0.3s;
        }
        .fab-button:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
        }
        .fab-button:hover::before {
            opacity: 1;
        }
        .fab-notification {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid #08090F;
            animation: blink-dot 2s infinite;
        }
        @keyframes fab-float {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8,9,15,0.95);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-glow);
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .article-hero-banner {
                height: 240px;
            }
        }
        @media (max-width: 768px) {
            .article-page {
                padding-top: 100px;
            }
            .article-hero-banner {
                height: 200px;
                border-radius: var(--radius-md);
            }
            .article-meta-bar {
                gap: 12px;
            }
            .article-content-body {
                font-size: 0.95rem;
            }
            .article-cta-banner {
                padding: 28px 20px;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 0.9rem;
                max-width: 200px;
            }
            .btn-login, .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .article-hero-banner {
                height: 180px;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }
        
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.2);
            transition: all 0.25s ease;
        }
        
        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }
        
        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }
        
        /* Section Title */
        .section-title {
            font-size: clamp(2rem, 3.5vw, 2.8rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            text-align: left;
        }
        
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            line-height: 1.7;
            max-width: 700px;
            text-align: left;
            margin-bottom: 48px;
        }
        
        /* Glass Card */
        .glass-card {
            background: rgba(13, 17, 30, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(0, 82, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all 0.3s ease;
        }
        
        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 8px 32px rgba(0, 82, 255, 0.25);
            transform: translateY(-4px);
        }
        
        /* Glow Button */
        .btn-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, #0052FF, #0040cc);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: all 0.3s ease;
        }
        
        .btn-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.6);
        }
        
        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-neon);
            background: transparent;
            border: 2px solid rgba(0, 240, 255, 0.5);
            transition: all 0.3s ease;
        }
        
        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.3);
        }
        
        /* FAQ */
        .faq-item {
            border-bottom: 1px solid rgba(0, 82, 255, 0.15);
            padding: 20px 0;
            cursor: pointer;
        }
        
        .faq-question {
            font-size: 1.1rem;
            font-weight: 700;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 12px;
        }
        
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
        }
        
        .faq-icon {
            font-size: 1.5rem;
            color: var(--accent-neon);
            transition: transform 0.3s ease;
            flex-shrink: 0;
        }
        
        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-glow);
            padding: 40px 0;
            margin-top: var(--space-section);
        }
        
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            justify-content: center;
            margin-bottom: 20px;
        }
        
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color 0.2s;
        }
        
        .footer-links a:hover {
            color: var(--accent-neon);
        }
        
        .footer-copy {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 24px;
                gap: 8px;
                border-bottom: 1px solid var(--border-glow);
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-logo {
                font-size: 1rem;
                max-width: 220px;
            }
        }
        
        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .btn-glow,
            .btn-outline-glow {
                width: 100%;
                justify-content: center;
                font-size: 0.95rem;
                padding: 12px 24px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }
        
        html {
            scroll-behavior: smooth;
        }
        
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        
        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }
        
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }
        
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }
        
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.25s ease;
        }
        
        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }
        
        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }
        
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }
        
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }
        
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.5);
            transition: all 0.3s ease;
        }
        
        .btn-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.6);
        }
        
        .glass-card {
            background: rgba(13, 17, 30, 0.65);
            backdrop-filter: blur(15px);
            -webkit-backdrop-filter: blur(15px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
            transition: all 0.3s ease;
        }
        
        .glass-card:hover {
            border-color: var(--accent-neon);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }
        
        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.5rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.2;
            margin-bottom: 12px;
        }
        
        .text-gradient {
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 48px 0 32px;
            text-align: center;
        }
        
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 24px;
        }
        
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s ease;
        }
        
        .footer-links a:hover {
            color: var(--accent-neon);
        }
        
        .footer-copy {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #00F0FF, #0052FF) 1;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-neon);
            font-size: 1.3rem;
            transition: all 0.3s ease;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            cursor: pointer;
            opacity: 0.6;
        }
        
        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                border-bottom: 1px solid rgba(0, 82, 255, 0.3);
                max-height: 80vh;
                overflow-y: auto;
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .nav-links a {
                padding: 12px 16px;
                border-radius: var(--radius-sm);
                font-size: 1rem;
                justify-content: flex-start;
            }
            .mobile-menu-btn {
                display: block;
            }
            .nav-logo {
                font-size: 0.95rem;
                max-width: 200px;
            }
            .btn-login {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .hero-section {
                min-height: 60vh;
                padding-top: 100px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }
        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.25s ease;
        }
        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }
        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }
        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }
        .category-hero {
            padding-top: 140px;
            padding-bottom: 90px;
            background-image: url('/assets/images/backpic/back-2.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 60vh;
            display: flex;
            align-items: center;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.9) 0%, rgba(8,9,15,0.75) 60%, rgba(8,9,15,0.95) 100%);
        }
        .category-hero-content {
            position: relative;
            z-index: 2;
            max-width: 720px;
        }
        .category-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 24px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-neon);
            margin-bottom: 24px;
        }
        .category-title {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }
        .category-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 36px;
            max-width: 560px;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.6);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 600;
            color: var(--accent-neon);
            background: transparent;
            border: 1.5px solid rgba(0, 240, 255, 0.4);
            transition: all 0.25s ease;
            text-decoration: none;
        }
        .btn-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-neon);
        }
        .section-padding {
            padding-top: var(--space-section);
            padding-bottom: var(--space-section);
        }
        .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            color: var(--accent-neon);
            text-transform: uppercase;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            line-height: 1.25;
        }
        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 640px;
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all 0.35s ease;
        }
        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
        }
        .tip-card {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all 0.3s ease;
        }
        .tip-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: var(--shadow-neon);
        }
        .tip-icon {
            flex-shrink: 0;
            width: 52px;
            height: 52px;
            border-radius: var(--radius-sm);
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.3), rgba(0, 240, 255, 0.1));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-neon);
        }
        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding: 24px 0;
            cursor: pointer;
            transition: all 0.2s ease;
        }
        .faq-item summary {
            font-weight: 700;
            font-size: 1.1rem;
            color: var(--text-primary);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .faq-item summary::-webkit-details-marker {
            display: none;
        }
        .faq-item p {
            margin-top: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .cta-section {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15) 0%, rgba(0, 240, 255, 0.05) 100%);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            text-align: center;
            padding: 60px 40px;
        }
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 40px 0;
            text-align: center;
        }
        .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 24px;
            margin-bottom: 24px;
        }
        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--accent-neon);
        }
        .footer-copy {
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        @media (max-width: 1024px) {
            .nav-links {
                display: none;
            }
            .nav-links.mobile-open {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.95);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                padding: 16px 24px;
                gap: 4px;
                border-bottom: 1px solid var(--border-glow);
            }
            .mobile-menu-btn {
                display: block;
            }
            .tip-card {
                flex-direction: column;
            }
        }
        @media (max-width: 768px) {
            .category-hero {
                min-height: auto;
                padding-top: 120px;
                padding-bottom: 60px;
            }
            .section-padding {
                padding-top: 50px;
                padding-bottom: 50px;
            }
            .cta-section {
                padding: 40px 24px;
            }
        }
        @media (max-width: 520px) {
            .nav-logo {
                font-size: 0.9rem;
                max-width: 200px;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
            .tip-card {
                padding: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --accent-electric: #0052FF;
            --accent-neon: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #64748B;
            --border-glow: rgba(0, 82, 255, 0.3);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 16px;
            --radius-md: 12px;
            --radius-sm: 8px;
            --space-section: 80px;
            --space-element: 24px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            margin: 0;
            padding: 0;
            min-height: 100vh;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: color 0.2s ease;
        }

        button {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 100;
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            transition: all 0.3s ease;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        .nav-logo {
            font-size: 1.15rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, var(--accent-neon), var(--accent-electric));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            white-space: nowrap;
            line-height: 1.3;
            max-width: 320px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-neon);
            background: rgba(0, 240, 255, 0.08);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(255,255,255,0.2);
            transition: all 0.25s ease;
        }

        .btn-login:hover {
            border-color: var(--accent-neon);
            color: var(--accent-neon);
        }

        .btn-signup {
            padding: 8px 20px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0040cc);
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all 0.25s ease;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            padding: 4px;
        }

        /* Page Banner */
        .page-banner {
            padding-top: 120px;
            padding-bottom: 60px;
            background-image: url('/assets/images/backpic/back-3.jpg');
            background-size: cover;
            background-position: center;
            position: relative;
            min-height: 50vh;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(8,9,15,0.9) 0%, rgba(8,9,15,0.75) 60%, rgba(8,9,15,0.95) 100%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 680px;
        }

        .banner-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 24px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-neon);
            margin-bottom: 24px;
        }

        .banner-badge i {
            font-size: 0.75rem;
            animation: pulse-dot 1.5s infinite;
        }

        .banner-title {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.03em;
            margin-bottom: 20px;
        }

        .banner-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
            max-width: 560px;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.3); }
        }

        /* Section Titles */
        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-subtitle {
            font-size: 1.05rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 650px;
            line-height: 1.6;
        }

        /* Glass Card */
        .glass-card {
            background: rgba(13, 17, 30, 0.6);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(0, 82, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 32px;
            transition: all 0.3s ease;
        }

        .glass-card:hover {
            border-color: rgba(0, 240, 255, 0.4);
            box-shadow: 0 8px 32px rgba(0, 82, 255, 0.15);
        }

        /* Timeline / Step */
        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .step-item {
            display: flex;
            gap: 20px;
            padding: 28px 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
            position: relative;
            align-items: flex-start;
        }

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

        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-electric), #0033aa);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.4);
        }

        .step-body h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 8px 0;
        }

        .step-body p {
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* Platform Cards */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .platform-card {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: left;
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .platform-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-electric), var(--accent-neon));
            opacity: 0;
            transition: opacity 0.3s ease;
        }

        .platform-card:hover::before {
            opacity: 1;
        }

        .platform-card:hover {
            border-color: rgba(0, 240, 255, 0.5);
            box-shadow: 0 8px 30px rgba(0, 82, 255, 0.2);
            transform: translateY(-4px);
        }

        .platform-icon {
            font-size: 2.5rem;
            color: var(--accent-neon);
            margin-bottom: 16px;
        }

        .platform-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

        .platform-card p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.6;
        }

        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 24px;
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent-neon);
            border: 1px solid rgba(0, 240, 255, 0.5);
            background: transparent;
            transition: all 0.25s ease;
        }

        .btn-outline-glow:hover {
            background: rgba(0, 240, 255, 0.1);
            box-shadow: var(--shadow-neon);
        }

        /* Benefits List */
        .benefits-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .benefit-item {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            padding: 20px;
            border-radius: var(--radius-md);
            background: rgba(13, 17, 30, 0.4);
            border: 1px solid transparent;
            transition: all 0.25s ease;
        }

        .benefit-item:hover {
            border-color: rgba(0, 240, 255, 0.2);
            background: rgba(13, 17, 30, 0.7);
        }

        .benefit-icon {
            flex-shrink: 0;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-neon);
            font-size: 1.1rem;
        }

        .benefit-text h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 0 0 6px 0;
        }

        .benefit-text p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.5;
        }

        /* FAQ Section */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid rgba(0, 82, 255, 0.15);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: rgba(0, 240, 255, 0.3);
        }

        .faq-item summary {
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary i {
            font-size: 0.8rem;
            color: var(--accent-neon);
            transition: transform 0.3s ease;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-item p {
            margin-top: 14px;
            color: var(--text-secondary);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        /* CTA Block */
        .cta-block {
            background: linear-gradient(135deg, rgba(0, 82, 255, 0.15), rgba(0, 240, 255, 0.05));
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: var(--radius-lg);
            padding: 48px 32px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -10%;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(0,240,255,0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .btn-primary-cta {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 30px;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-electric), #0033cc);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: all 0.3s ease;
        }

        .btn-primary-cta:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 30px rgba(0, 240, 255, 0.6);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 48px 0 32px;
            margin-top: var(--space-section);
        }

        .footer-links {
            display: flex;
            flex-wrap: wrap;
            gap: 16px 24px;
            margin-bottom: 24px;
            justify-content: center;
        }

        .footer-links a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color 0.2s ease;
        }

        .footer-links a:hover {
            color: var(--accent-neon);
        }

        .footer-copy {
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
            margin: 0;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .nav-logo {
                max-width: 240px;
                font-size: 1rem;
            }
            .nav-links a {
                padding: 6px 12px;
                font-size: 0.82rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 68px;
                left: 0;
                right: 0;
                background: rgba(8, 9, 15, 0.98);
                flex-direction: column;
                padding: 16px;
                border-bottom: 1px solid rgba(0, 82, 255, 0.3);
                gap: 4px;
            }
            .nav-links.mobile-open {
                display: flex;
            }
            .nav-links a {
                width: 100%;
                padding: 10px 16px;
                font-size: 0.9rem;
            }
            .mobile-menu-btn {
                display: block;
            }
            .page-banner {
                min-height: 40vh;
                padding-top: 100px;
                padding-bottom: 40px;
            }
            .banner-title {
                font-size: 1.8rem;
            }
            .banner-desc {
                font-size: 1rem;
            }
            .platform-grid {
                grid-template-columns: 1fr;
            }
            .benefits-grid {
                grid-template-columns: 1fr;
            }
            .step-item {
                flex-direction: column;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-container {
                padding: 0 16px;
            }
            .nav-logo {
                max-width: 180px;
                font-size: 0.85rem;
            }
            .btn-login, .btn-signup {
                padding: 6px 14px;
                font-size: 0.8rem;
            }
        }