/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #111827;
            --accent: #0052FF;
            --accent-glow: #00F0FF;
            --accent-secondary: #7C3AED;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-color: rgba(0,240,255,0.15);
            --border-glow: rgba(0,240,255,0.5);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 8px 24px rgba(0,0,0,0.5);
            --shadow-glow: 0 0 20px rgba(0,240,255,0.25);
            --shadow-glow-hover: 0 0 35px rgba(0,240,255,0.5);
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        html { scroll-behavior: smooth; }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
        button { cursor: pointer; border: none; font-family: inherit; }
        
        /* Header & Nav */
        .header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 100;
            background: rgba(8,9,15,0.85); backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            transition: all var(--transition-smooth);
        }
        .header.scrolled { background: rgba(8,9,15,0.95); box-shadow: 0 4px 20px rgba(0,0,0,0.4); }
        .nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
        .nav-logo {
            font-size: 1.25rem; font-weight: 700; color: var(--text-primary);
            display: flex; align-items: center; gap: 10px;
            letter-spacing: -0.02em;
        }
        .nav-logo i { color: var(--accent-glow); font-size: 1.5rem; filter: drop-shadow(0 0 8px var(--accent-glow)); }
        .nav-links { display: flex; align-items: center; gap: 32px; list-style: none; }
        .nav-links a {
            font-size: 0.9rem; font-weight: 500; color: var(--text-secondary);
            position: relative; padding: 8px 0; transition: color var(--transition-fast);
        }
        .nav-links a:hover, .nav-links a.active { color: var(--accent-glow); }
        .nav-links a.active::after {
            content: ''; position: absolute; bottom: -2px; left: 0; width: 100%; height: 2px;
            background: linear-gradient(90deg, var(--accent), var(--accent-glow));
            border-radius: 1px; box-shadow: 0 0 10px var(--accent-glow);
        }
        .nav-actions { display: flex; align-items: center; gap: 12px; }
        .btn-login {
            background: transparent; color: var(--text-primary); border: 1px solid rgba(255,255,255,0.25);
            padding: 8px 20px; border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 600;
            transition: all var(--transition-fast);
        }
        .btn-login:hover { border-color: var(--accent-glow); color: var(--accent-glow); background: rgba(0,240,255,0.05); }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent), var(--accent-secondary));
            color: white; padding: 10px 24px; border-radius: var(--radius-sm); font-size: 0.85rem; font-weight: 700;
            box-shadow: 0 0 15px rgba(0,82,255,0.4); transition: all var(--transition-fast);
        }
        .btn-signup:hover { transform: translateY(-1px); box-shadow: 0 0 25px rgba(0,82,255,0.6); }
        .mobile-toggle { display: none; background: none; border: none; color: white; font-size: 1.5rem; padding: 4px; }
        
        /* Hero */
        .hero {
            padding-top: 120px; padding-bottom: 80px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover; background-position: center; background-repeat: no-repeat;
            position: relative; min-height: 85vh; display: flex; align-items: center;
        }
        .hero::after {
            content: ''; position: absolute; inset: 0;
            background: linear-gradient(135deg, rgba(8,9,15,0.92) 0%, rgba(13,17,30,0.7) 50%, rgba(8,9,15,0.9) 100%);
        }
        .hero-content { position: relative; z-index: 2; max-width: 720px; }
        .hero-badge {
            display: inline-flex; align-items: center; gap: 8px;
            background: rgba(0,240,255,0.1); border: 1px solid rgba(0,240,255,0.3);
            padding: 8px 18px; border-radius: 50px; font-size: 0.8rem; font-weight: 600;
            color: var(--accent-glow); margin-bottom: 28px;
            backdrop-filter: blur(10px);
        }
        .hero-badge i { font-size: 0.7rem; animation: pulse 2s infinite; }
        @keyframes pulse { 0%,100%{opacity:1;} 50%{opacity:0.3;} }
        .hero h1 {
            font-size: 3.6rem; font-weight: 800; line-height: 1.2; letter-spacing: -0.03em;
            margin-bottom: 20px; background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 70%);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem; color: var(--text-secondary); line-height: 1.7;
            margin-bottom: 36px; max-width: 580px;
        }
        .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-glow), var(--accent));
            color: #000; padding: 14px 36px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 700;
            box-shadow: 0 0 25px rgba(0,240,255,0.4); transition: all var(--transition-fast);
            border: none; display: inline-flex; align-items: center; gap: 8px;
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 0 40px rgba(0,240,255,0.6); }
        .btn-outline {
            background: transparent; color: white; border: 1.5px solid rgba(255,255,255,0.3);
            padding: 14px 36px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 600;
            transition: all var(--transition-fast);
        }
        .btn-outline:hover { border-color: var(--accent-glow); background: rgba(0,240,255,0.05); }
        
        /* Sections */
        section { padding: 80px 0; }
        .section-header { margin-bottom: 48px; }
        .section-label {
            display: inline-block; font-size: 0.8rem; font-weight: 700; text-transform: uppercase;
            letter-spacing: 0.08em; color: var(--accent-glow); margin-bottom: 12px;
        }
        .section-title {
            font-size: 2.4rem; font-weight: 700; line-height: 1.3; letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .section-desc { font-size: 1.05rem; color: var(--text-secondary); max-width: 640px; line-height: 1.7; }
        
        /* Cards */
        .card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 24px; }
        .card {
            background: var(--bg-card); border: 1px solid var(--border-color);
            border-radius: var(--radius-lg); padding: 32px; transition: all var(--transition-smooth);
            position: relative; overflow: hidden;
        }
        .card::before {
            content: ''; position: absolute; top: 0; left: 0; right: 0; height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
            opacity: 0; transition: opacity var(--transition-smooth);
        }
        .card:hover { border-color: var(--border-glow); box-shadow: var(--shadow-glow); transform: translateY(-4px); }
        .card:hover::before { opacity: 1; }
        .card-icon {
            font-size: 2rem; color: var(--accent-glow); margin-bottom: 18px;
            filter: drop-shadow(0 0 8px rgba(0,240,255,0.5));
        }
        .card-title { font-size: 1.2rem; font-weight: 700; margin-bottom: 10px; }
        .card-desc { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        
        /* Feature List */
        .feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
        .feature-image img { border-radius: var(--radius-lg); box-shadow: var(--shadow-md); }
        .feature-item { display: flex; gap: 16px; margin-bottom: 28px; }
        .feature-item i {
            font-size: 1.4rem; color: var(--accent-glow); flex-shrink: 0; margin-top: 4px;
            filter: drop-shadow(0 0 6px rgba(0,240,255,0.4));
        }
        .feature-item h4 { font-size: 1.05rem; font-weight: 600; margin-bottom: 4px; }
        .feature-item p { font-size: 0.9rem; color: var(--text-muted); line-height: 1.6; }
        
        /* Hot List */
        .hot-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 20px; }
        .hot-item {
            display: flex; align-items: center; gap: 16px; background: var(--bg-card);
            padding: 18px 22px; border-radius: var(--radius-md); border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
        }
        .hot-item:hover { border-color: var(--accent-glow); box-shadow: var(--shadow-sm); }
        .hot-rank {
            font-size: 1.6rem; font-weight: 800; color: var(--accent-glow);
            min-width: 40px; text-align: center; text-shadow: 0 0 12px rgba(0,240,255,0.5);
        }
        .hot-info h5 { font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
        .hot-info span { font-size: 0.8rem; color: var(--text-muted); }
        .hot-stats { font-size: 0.85rem; color: var(--accent-glow); font-weight: 600; margin-left: auto; }
        
        /* Campaign Block */
        .campaign {
            background: linear-gradient(135deg, #0D111E 0%, #1A0A2E 50%, #0D111E 100%);
            border: 1px solid rgba(124,58,237,0.3); border-radius: var(--radius-xl);
            padding: 48px; position: relative; overflow: hidden;
        }
        .campaign::after {
            content: ''; position: absolute; top: -40px; right: -40px; width: 200px; height: 200px;
            background: radial-gradient(circle, rgba(124,58,237,0.3), transparent 70%);
            border-radius: 50%;
        }
        .campaign-inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
        .campaign-tag {
            display: inline-block; background: #7C3AED; color: white; padding: 6px 16px;
            border-radius: 50px; font-size: 0.75rem; font-weight: 700; margin-bottom: 16px;
            animation: pulse 2s infinite;
        }
        .campaign h3 { font-size: 2rem; font-weight: 700; margin-bottom: 12px; }
        .campaign p { color: var(--text-secondary); margin-bottom: 20px; }
        
        /* News Section */
        .news-grid { display: grid; grid-template-columns: 1.5fr 1fr; gap: 32px; }
        .news-list { display: flex; flex-direction: column; gap: 16px; }
        .news-item {
            display: flex; align-items: center; gap: 16px; background: var(--bg-card);
            padding: 16px 20px; border-radius: var(--radius-md); border: 1px solid var(--border-color);
            transition: all var(--transition-fast);
        }
        .news-item:hover { border-color: var(--accent-glow); }
        .news-thumb {
            width: 60px; height: 60px; border-radius: var(--radius-sm); overflow: hidden;
            flex-shrink: 0; background: var(--bg-secondary);
        }
        .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .news-body h5 { font-size: 0.95rem; font-weight: 600; margin-bottom: 4px; line-height: 1.4; }
        .news-body .news-meta { font-size: 0.78rem; color: var(--text-muted); }
        .news-featured {
            background: var(--bg-card); border-radius: var(--radius-lg); overflow: hidden;
            border: 1px solid var(--border-color); position: relative;
        }
        .news-featured img { width: 100%; height: 200px; object-fit: cover; }
        .news-featured-body { padding: 20px; }
        .news-featured-body h4 { font-size: 1.15rem; font-weight: 700; margin-bottom: 8px; }
        .news-featured-body p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.5; }
        
        /* FAQ */
        .faq-list { max-width: 800px; }
        .faq-item { border-bottom: 1px solid var(--border-color); padding: 24px 0; }
        .faq-item summary {
            font-size: 1.1rem; font-weight: 600; cursor: pointer; list-style: none;
            display: flex; justify-content: space-between; align-items: center;
            transition: color var(--transition-fast);
        }
        .faq-item summary:hover { color: var(--accent-glow); }
        .faq-item summary i { transition: transform var(--transition-fast); font-size: 0.9rem; color: var(--accent-glow); }
        .faq-item[open] summary i { transform: rotate(180deg); }
        .faq-item p { margin-top: 14px; font-size: 0.95rem; color: var(--text-secondary); line-height: 1.7; }
        
        /* CTA Section */
        .cta-section {
            text-align: center; background: linear-gradient(135deg, rgba(0,82,255,0.1), rgba(0,240,255,0.05));
            border-radius: var(--radius-xl); padding: 60px 24px; border: 1px solid var(--border-color);
        }
        .cta-section h2 { font-size: 2rem; font-weight: 700; margin-bottom: 16px; }
        .cta-section p { color: var(--text-secondary); margin-bottom: 32px; max-width: 500px; margin-left: auto; margin-right: auto; }
        
        /* FAB */
        .fab {
            position: fixed; left: 20px; bottom: 100px; z-index: 50;
            width: 56px; height: 56px; border-radius: 50%;
            background: rgba(13,17,30,0.8); backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex; align-items: center; justify-content: center;
            font-size: 1.4rem; color: var(--accent-glow);
            box-shadow: 0 0 20px rgba(0,240,255,0.4);
            cursor: pointer; transition: all var(--transition-smooth);
            animation: float 3s ease-in-out infinite;
        }
        .fab::before {
            content: ''; position: absolute; inset: -3px; border-radius: 50%;
            background: linear-gradient(135deg, #00F0FF, #0052FF);
            z-index: -1; opacity: 0.6;
        }
        @keyframes float { 0%,100%{transform:translateY(0);} 50%{transform:translateY(-8px);} }
        .fab:hover { transform: scale(1.1); box-shadow: 0 0 35px rgba(0,240,255,0.7); }
        .fab .notify-dot {
            position: absolute; top: 4px; right: 4px; width: 10px; height: 10px;
            background: #FF007F; border-radius: 50%; animation: blink 1s infinite;
        }
        @keyframes blink { 0%,100%{opacity:1;} 50%{opacity:0;} }
        
        /* Footer */
        .footer {
            background: var(--bg-secondary); border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
        }
        .footer-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: 32px; margin-bottom: 32px; }
        .footer-col h5 { font-weight: 700; margin-bottom: 14px; font-size: 0.95rem; }
        .footer-col a { display: block; font-size: 0.85rem; color: var(--text-muted); margin-bottom: 8px; transition: color var(--transition-fast); }
        .footer-col a:hover { color: var(--accent-glow); }
        .footer-bottom {
            text-align: center; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.05);
            font-size: 0.8rem; color: var(--text-muted);
        }
        
        /* Responsive */
        @media (max-width: 1024px) {
            .hero h1 { font-size: 2.8rem; }
            .feature-list { grid-template-columns: 1fr; }
            .news-grid { grid-template-columns: 1fr; }
            .campaign-inner { grid-template-columns: 1fr; }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions .btn-login, .nav-actions .btn-signup { display: none; }
            .mobile-toggle { display: block; }
            .nav-actions { gap: 8px; }
            .nav-links.mobile-open {
                display: flex; flex-direction: column; position: absolute; top: 72px; left: 0; right: 0;
                background: rgba(8,9,15,0.98); padding: 20px; gap: 16px; border-bottom: 1px solid var(--border-color);
            }
            .nav-actions.mobile-open { display: flex; flex-direction: column; gap: 10px; width: 100%; }
            .nav-actions.mobile-open .btn-login, .nav-actions.mobile-open .btn-signup { display: block; width: 100%; text-align: center; }
            .hero { min-height: 70vh; padding-top: 100px; padding-bottom: 48px; }
            .hero h1 { font-size: 2.2rem; }
            .hero-desc { font-size: 0.95rem; }
            .section-title { font-size: 1.8rem; }
            section { padding: 48px 0; }
            .card-grid { grid-template-columns: 1fr; }
            .hot-list { grid-template-columns: 1fr; }
            .campaign { padding: 28px; }
            .campaign h3 { font-size: 1.5rem; }
            .fab { left: 12px; bottom: 80px; width: 48px; height: 48px; font-size: 1.2rem; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .hero-btns { flex-direction: column; }
            .btn-primary, .btn-outline { width: 100%; justify-content: center; }
            .section-title { font-size: 1.5rem; }
        }

/* roulang page: article */
:root {
            --primary-bg: #1A1A1A;
            --secondary-bg: #121212;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --text-primary: #F5F5F7;
            --text-muted: #D5D8DC;
            --text-soft: #A0A0A0;
            --border-color: #2C2C2C;
            --card-bg: #1E1E1E;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.3);
            --shadow-md: 0 6px 20px rgba(0,0,0,0.5);
            --shadow-lg: 0 12px 32px rgba(0,0,0,0.6);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        body {
            background-color: var(--secondary-bg);
            color: var(--text-primary);
            font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        .container {
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 20px;
            padding-right: 20px;
        }
        /* Header / Navigation */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(18,18,18,0.88);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(197,160,89,0.2);
            z-index: 100;
            box-shadow: 0 4px 20px rgba(0,0,0,0.4);
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
            white-space: nowrap;
        }
        .nav-logo i {
            color: var(--accent-gold);
            font-size: 1.6rem;
            filter: drop-shadow(0 0 6px rgba(197,160,89,0.5));
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 1.8rem;
            align-items: center;
        }
        .nav-links a {
            color: var(--text-muted);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            transition: color 0.2s, border-bottom 0.2s;
            border-bottom: 2px solid transparent;
            padding-bottom: 4px;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-gold);
            border-bottom-color: var(--accent-gold);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.2s;
            backdrop-filter: blur(4px);
        }
        .btn-login:hover {
            border-color: var(--accent-gold);
            color: var(--accent-gold);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            border: none;
            color: #0A0A0A;
            padding: 8px 22px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s;
            box-shadow: 0 4px 12px rgba(197,160,89,0.35);
        }
        .btn-signup:hover {
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(197,160,89,0.5);
            background: var(--accent-amber);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
        }
        @media (max-width: 1024px) {
            .nav-links {
                gap: 1.2rem;
            }
            .nav-links a {
                font-size: 0.85rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(10,10,10,0.96);
                backdrop-filter: blur(24px);
                flex-direction: column;
                align-items: flex-start;
                padding: 24px 20px;
                gap: 18px;
                transform: translateY(-120%);
                transition: transform 0.3s ease;
                box-shadow: var(--shadow-lg);
                border-bottom: 1px solid var(--border-color);
                z-index: 99;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-actions {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
        }
        /* Article main layout */
        .article-main {
            padding-top: 100px;
            padding-bottom: 60px;
            min-height: 70vh;
        }
        .article-container {
            max-width: 820px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .article-hero-image {
            width: 100%;
            height: 380px;
            object-fit: cover;
            border-radius: var(--radius-lg);
            margin-bottom: 32px;
            box-shadow: var(--shadow-md);
            border: 1px solid rgba(197,160,89,0.2);
        }
        @media (max-width: 640px) {
            .article-hero-image {
                height: 240px;
            }
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            color: var(--text-soft);
            font-size: 0.9rem;
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .article-meta span {
            background: var(--card-bg);
            padding: 4px 14px;
            border-radius: 50px;
            font-weight: 500;
            border: 1px solid var(--border-color);
        }
        .article-meta .category-badge {
            background: var(--accent-gold);
            color: #0A0A0A;
            font-weight: 700;
            border: none;
        }
        .article-title {
            font-family: var(--font-heading);
            font-size: 2.6rem;
            font-weight: 700;
            line-height: 1.25;
            margin-bottom: 24px;
            color: #FFFFFF;
            letter-spacing: -0.5px;
        }
        @media (max-width: 640px) {
            .article-title {
                font-size: 1.9rem;
            }
        }
        .article-body {
            font-size: 1.05rem;
            line-height: 1.7;
            color: var(--text-muted);
        }
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: #FFFFFF;
            margin-top: 44px;
            margin-bottom: 16px;
            border-left: 4px solid var(--accent-gold);
            padding-left: 20px;
        }
        .article-body h3 {
            font-size: 1.4rem;
            font-weight: 600;
            color: #F5F5F5;
            margin-top: 32px;
            margin-bottom: 12px;
        }
        .article-body p {
            margin-bottom: 20px;
            color: #D1D5DB;
        }
        .article-body strong {
            color: var(--accent-amber);
            font-weight: 600;
        }
        .article-body ul, .article-body ol {
            margin-bottom: 24px;
            padding-left: 28px;
        }
        .article-body li {
            margin-bottom: 8px;
        }
        .not-found-message {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-muted);
        }
        .not-found-message h3 {
            font-size: 2rem;
            margin-bottom: 16px;
        }
        .back-home-link {
            color: var(--accent-gold);
            font-weight: 700;
            text-decoration: underline;
        }
        /* Footer */
        .footer {
            background: #0E0E0E;
            border-top: 1px solid #2C2C2C;
            padding: 60px 0 32px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4,1fr);
            gap: 30px;
            margin-bottom: 40px;
        }
        @media (max-width: 768px) {
            .footer-grid {
                grid-template-columns: repeat(2,1fr);
            }
        }
        @media (max-width: 480px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-gold);
        }
        .footer-col a, .footer-col p {
            display: block;
            color: #9CA3AF;
            text-decoration: none;
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: color 0.2s;
        }
        .footer-col a:hover {
            color: #FFFFFF;
        }
        .footer-bottom {
            text-align: center;
            border-top: 1px solid #2C2C2C;
            padding-top: 24px;
            font-size: 0.8rem;
            color: #6B7280;
        }
        .spacer {
            flex-grow: 1;
        }
        /* Left FAB (Royal style) */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: radial-gradient(circle at 30% 30%, #1E1E1E, #0A0A0A);
            border: 2px solid #C5A059;
            box-shadow: 0 4px 20px rgba(197,160,89,0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.2s;
            animation: floatChip 3s infinite ease-in-out;
        }
        .fab-left i {
            color: var(--accent-gold);
            font-size: 1.8rem;
        }
        .fab-left:hover {
            transform: scale(1.1);
            opacity: 1;
            box-shadow: 0 8px 28px rgba(197,160,89,0.6);
        }
        .fab-left:active {
            transform: scale(0.95);
        }
        @keyframes floatChip {
            0% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
            100% { transform: translateY(0); }
        }

/* roulang page: category1 */
@import url('/assets/css/vendor/9723b7396f-css2.css');
        :root {
            --primary-bg: #0F0C20;
            --secondary-bg: #0B1A30;
            --card-bg: #13102B;
            --accent-lime: #CCFF00;
            --accent-cyan: #00F0FF;
            --accent-purple: #A855F7;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #6B7280;
            --border-neon: #CCFF00;
            --border-cyan: #00F0FF;
            --shadow-neon: 0 4px 30px rgba(204, 255, 0, 0.3);
            --shadow-cyan: 0 0 25px rgba(0, 240, 255, 0.35);
            --radius-lg: 24px;
            --radius-md: 16px;
            --radius-sm: 10px;
            --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Be Vietnam Pro', 'Inter', sans-serif;
            background: var(--primary-bg);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        body::before {
            content: "";
            position: fixed;
            top: 0; left: 0; width: 100%; height: 100%;
            background: radial-gradient(circle at 20% 20%, rgba(204,255,0,0.05) 0%, transparent 50%),
                        radial-gradient(circle at 80% 60%, rgba(0,240,255,0.07) 0%, transparent 50%);
            pointer-events: none; z-index: 0;
        }
        .container {
            max-width: 1280px;
            margin-left: auto; margin-right: auto;
            padding-left: 24px; padding-right: 24px;
            position: relative; z-index: 2;
        }
        .header {
            position: sticky; top: 0; z-index: 50;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(204, 255, 0, 0.25);
            padding: 14px 0;
            transition: var(--transition);
        }
        .nav {
            display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap;
        }
        .nav-logo {
            display: flex; align-items: center; gap: 10px;
            font-size: 1.4rem; font-weight: 800;
            background: linear-gradient(to right, var(--accent-lime), var(--accent-cyan));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            text-decoration: none; letter-spacing: -0.5px;
        }
        .nav-logo i { font-size: 1.8rem; background: none; -webkit-text-fill-color: var(--accent-lime); }
        .nav-links {
            display: flex; gap: 32px; list-style: none; align-items: center;
        }
        .nav-links a {
            color: var(--text-secondary); text-decoration: none; font-weight: 600;
            font-size: 0.95rem; transition: var(--transition); position: relative;
            padding-bottom: 6px;
        }
        .nav-links a.active, .nav-links a:hover { color: var(--accent-lime); }
        .nav-links a.active::after {
            content: ""; position: absolute; bottom: -2px; left: 0; width: 100%;
            height: 2px; background: var(--accent-lime); box-shadow: 0 0 12px var(--accent-lime);
        }
        .nav-actions { display: flex; gap: 14px; align-items: center; }
        .btn-login {
            background: transparent; border: 1px solid var(--accent-cyan); color: var(--accent-cyan);
            padding: 10px 24px; border-radius: 50px; font-weight: 700; cursor: pointer;
            transition: var(--transition); font-size: 0.9rem;
        }
        .btn-login:hover { background: rgba(0,240,255,0.15); box-shadow: 0 0 18px rgba(0,240,255,0.3); }
        .btn-signup {
            background: var(--accent-lime); border: none; color: #0F0C20;
            padding: 10px 24px; border-radius: 50px; font-weight: 800; cursor: pointer;
            transition: var(--transition); font-size: 0.9rem; box-shadow: var(--shadow-neon);
        }
        .btn-signup:hover { transform: translateY(-2px); box-shadow: 0 8px 25px rgba(204,255,0,0.5); }
        .mobile-toggle { display: none; background: none; border: none; color: white; font-size: 1.8rem; cursor: pointer; }
        @media (max-width: 1024px) {
            .nav-links { gap: 20px; }
            .nav-logo { font-size: 1.2rem; }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions { display: none; }
            .mobile-toggle { display: block; }
            .nav-links.active-mobile {
                display: flex; flex-direction: column; width: 100%; background: rgba(15,12,32,0.98);
                padding: 20px; gap: 18px; margin-top: 12px; border-radius: 20px;
            }
            .nav-actions.active-mobile {
                display: flex; flex-direction: column; width: 100%; margin-top: 12px; gap: 12px;
            }
        }
        .hero-section {
            padding: 70px 0 60px;
            display: flex; align-items: center; gap: 50px;
            border-bottom: 1px solid rgba(204,255,0,0.2);
        }
        .hero-left { flex: 1; }
        .hero-right { flex: 1; display: flex; justify-content: center; position: relative; }
        .hero-right img {
            max-width: 100%; border-radius: 32px;
            box-shadow: 0 0 50px rgba(0,240,255,0.3);
            border: 1px solid rgba(0,240,255,0.4);
        }
        .hero-badge {
            display: inline-block; background: rgba(204,255,0,0.15); color: var(--accent-lime);
            padding: 6px 18px; border-radius: 50px; font-weight: 700; font-size: 0.85rem;
            margin-bottom: 18px; border: 1px solid rgba(204,255,0,0.4);
        }
        .hero-title {
            font-size: 3rem; font-weight: 900; line-height: 1.2;
            background: linear-gradient(to right, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .value-points { display: flex; gap: 30px; margin-top: 32px; }
        .value-item { display: flex; align-items: center; gap: 12px; }
        .value-item i { color: var(--accent-lime); font-size: 1.4rem; }
        @media (max-width: 768px) {
            .hero-section { flex-direction: column; padding: 40px 0; }
            .hero-title { font-size: 2.2rem; }
        }
        .section-title {
            font-size: 2.2rem; font-weight: 800; margin-bottom: 16px;
            background: linear-gradient(to right, var(--accent-lime), white);
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
        }
        .step-card {
            background: var(--card-bg); border: 1px solid rgba(204,255,0,0.25);
            border-radius: var(--radius-lg); padding: 32px;
            transition: var(--transition);
        }
        .step-card:hover { border-color: var(--accent-cyan); box-shadow: var(--shadow-cyan); }
        .faq-item {
            background: var(--card-bg); border: 1px solid rgba(255,255,255,0.05);
            border-radius: var(--radius-md); padding: 22px; margin-bottom: 16px;
            transition: var(--transition);
        }
        .faq-item:hover { border-color: var(--accent-lime); }
        .footer {
            background: #080612; border-top: 2px solid var(--accent-lime);
            padding: 50px 0 20px; margin-top: 60px;
        }
        .footer-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 30px; }
        .footer-col h5 { color: var(--accent-lime); margin-bottom: 16px; font-weight: 700; }
        .footer-col a { display: block; color: var(--text-secondary); text-decoration: none; margin-bottom: 10px; transition: var(--transition); }
        .footer-col a:hover { color: var(--accent-cyan); }
        .footer-bottom { text-align: center; margin-top: 40px; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); color: var(--text-muted); }
        @media (max-width: 768px) { .footer-grid { grid-template-columns: repeat(2,1fr); } }
        .fab-left {
            position: fixed; left: 20px; bottom: 100px; z-index: 50;
            background: rgba(15,12,32,0.7); backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 60px; padding: 14px;
            box-shadow: 0 0 22px rgba(0,240,255,0.6);
            transition: all 0.3s;
            display: flex; align-items: center; gap: 8px; cursor: pointer;
        }
        .fab-left::before {
            content: ""; position: absolute; top: -2px; left: -2px; right: -2px; bottom: -2px;
            border-radius: 60px; background: linear-gradient(45deg, var(--accent-lime), var(--accent-cyan));
            z-index: -1; opacity: 0.8;
        }
        .fab-left:hover { transform: scale(1.05); box-shadow: 0 0 35px rgba(0,240,255,0.9); }
        .fab-left i { font-size: 1.6rem; color: var(--accent-lime); }

/* roulang page: category2 */
:root {
            --primary: #FF4500;
            --primary-dark: #D32F2F;
            --secondary: #FFD700;
            --bg-dark: #0B0B0B;
            --bg-card: #161616;
            --bg-section: #1A1A1A;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --text-muted: #999999;
            --border: #333333;
            --border-glow: rgba(255, 69, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
            --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 4px 20px rgba(255, 69, 0, 0.25);
            --font-sans: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-dark);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

        button {
            cursor: pointer;
            font-family: inherit;
            border: none;
            outline: none;
            transition: all var(--transition);
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background: rgba(11, 11, 11, 0.95);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border);
            padding: 0;
        }

        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 20px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            white-space: nowrap;
        }

        .nav-logo i {
            color: var(--secondary);
            font-size: 1.4rem;
        }

        .nav-links {
            display: flex;
            list-style: none;
            gap: 4px;
        }

        .nav-links a {
            display: block;
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.06);
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            border: 2px solid var(--border);
            transition: all var(--transition);
        }

        .btn-login:hover {
            border-color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.05);
        }

        .btn-signup {
            background: var(--primary);
            color: #fff;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 700;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition);
            white-space: nowrap;
        }

        .btn-signup:hover {
            background: #FF5722;
            box-shadow: 0 6px 28px rgba(255, 69, 0, 0.4);
            transform: translateY(-1px);
        }

        .btn-signup:active {
            transform: translateY(1px);
            box-shadow: var(--shadow-sm);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: var(--text-primary);
            font-size: 1.4rem;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        .mobile-toggle:hover {
            background: rgba(255, 255, 255, 0.08);
        }

        /* Hero Section */
        .hero {
            position: relative;
            padding: 60px 0 50px;
            background: linear-gradient(135deg, #0B0B0B 0%, #1A0A02 40%, #0B0B0B 100%);
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(255, 69, 0, 0.12) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 1;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .hero-text h1 span {
            color: var(--primary);
        }

        .hero-text .hero-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 24px;
            line-height: 1.6;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 69, 0, 0.15);
            border: 1px solid rgba(255, 69, 0, 0.3);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            margin-bottom: 20px;
        }

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

        .hero-form h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .hero-form p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .form-group {
            margin-bottom: 14px;
        }

        .form-group label {
            display: block;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            margin-bottom: 5px;
        }

        .form-group input,
        .form-group select {
            width: 100%;
            padding: 12px 14px;
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            background: var(--bg-dark);
            color: var(--text-primary);
            font-size: 0.9rem;
            font-family: inherit;
            transition: border var(--transition);
        }

        .form-group input:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(255, 69, 0, 0.12);
        }

        .form-submit {
            width: 100%;
            background: var(--primary);
            color: #fff;
            padding: 13px;
            border-radius: 50px;
            font-size: 0.95rem;
            font-weight: 700;
            margin-top: 8px;
            box-shadow: var(--shadow-glow);
        }

        .form-submit:hover {
            background: #FF5722;
            box-shadow: 0 6px 28px rgba(255, 69, 0, 0.4);
        }

        .hero-visual {
            position: relative;
            z-index: 1;
        }

        .hero-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-lg);
            border: 2px solid var(--border);
        }

        .hero-stats {
            display: flex;
            gap: 24px;
            margin-top: 20px;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat .stat-num {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--secondary);
            display: block;
        }

        .hero-stat .stat-label {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* Section Common */
        .section {
            padding: 60px 0;
        }

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

        .section-header {
            margin-bottom: 40px;
            max-width: 700px;
        }

        .section-header h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .section-header h2 span {
            color: var(--primary);
        }

        .section-header p {
            font-size: 1rem;
            color: var(--text-muted);
            line-height: 1.6;
        }

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

        .step-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 28px 22px;
            border: 1px solid var(--border);
            position: relative;
            transition: all var(--transition);
        }

        .step-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--primary);
            color: #fff;
            font-weight: 800;
            font-size: 1.2rem;
            margin-bottom: 16px;
        }

        .step-card h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .step-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

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

        .knowledge-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid var(--border);
            transition: all var(--transition);
        }

        .knowledge-card:hover {
            border-color: var(--border-glow);
            box-shadow: var(--shadow-md);
        }

        .knowledge-card-img {
            height: 200px;
            overflow: hidden;
        }

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

        .knowledge-card:hover .knowledge-card-img img {
            transform: scale(1.05);
        }

        .knowledge-card-body {
            padding: 20px;
        }

        .knowledge-card-body h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .knowledge-card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.55;
        }

        .knowledge-tag {
            display: inline-block;
            background: rgba(255, 69, 0, 0.12);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.72rem;
            font-weight: 600;
            margin-bottom: 10px;
        }

        /* Strategy Comparison */
        .strategy-table-wrap {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
        }

        .strategy-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 700px;
            font-size: 0.9rem;
        }

        .strategy-table thead {
            background: var(--bg-card);
        }

        .strategy-table th {
            padding: 16px;
            text-align: left;
            font-weight: 700;
            color: var(--secondary);
            border-bottom: 2px solid var(--border);
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .strategy-table td {
            padding: 14px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-secondary);
        }

        .strategy-table tbody tr {
            transition: background var(--transition);
        }

        .strategy-table tbody tr:hover {
            background: rgba(255, 255, 255, 0.03);
        }

        .strategy-table .badge-success {
            display: inline-block;
            background: rgba(50, 205, 50, 0.18);
            color: #32CD32;
            padding: 3px 10px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        .strategy-table .badge-warning {
            display: inline-block;
            background: rgba(255, 204, 0, 0.18);
            color: #FFCC00;
            padding: 3px 10px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .faq-item:hover {
            border-color: var(--border-glow);
        }

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

        .faq-question i {
            color: var(--primary);
            transition: transform var(--transition);
            font-size: 0.9rem;
        }

        .faq-answer {
            padding: 0 22px 18px;
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.65;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

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

        /* CTA Section */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, #1A0A02 0%, #0B0B0B 30%, #1A0A02 70%, #0B0B0B 100%);
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at center, rgba(255, 69, 0, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 650px;
            margin: 0 auto;
        }

        .cta-content h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
            color: var(--text-primary);
        }

        .cta-content h2 span {
            color: var(--secondary);
        }

        .cta-content p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            line-height: 1.6;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        .btn-cta-primary {
            background: var(--primary);
            color: #fff;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            box-shadow: var(--shadow-glow);
        }

        .btn-cta-primary:hover {
            background: #FF5722;
            box-shadow: 0 8px 32px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
        }

        .btn-cta-secondary {
            background: transparent;
            color: var(--text-primary);
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 1rem;
            font-weight: 700;
            border: 2px solid var(--secondary);
            color: var(--secondary);
        }

        .btn-cta-secondary:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: #FFC107;
        }

        /* Footer */
        .footer {
            background: #080808;
            border-top: 1px solid var(--border);
            padding: 50px 0 30px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition);
        }

        .footer-col a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }

        .footer-bottom p {
            font-size: 0.78rem;
            color: var(--text-muted);
        }

        /* FAB */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 999;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--bg-dark);
            border: 2px solid var(--primary);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.35);
            transition: all var(--transition);
            opacity: 0.6;
            animation: fabPulse 2.5s ease-in-out infinite;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.55);
        }

        .fab:active {
            transform: scale(0.95);
        }

        @keyframes fabPulse {
            0%, 100% {
                box-shadow: 0 0 18px rgba(255, 69, 0, 0.35);
            }
            50% {
                box-shadow: 0 0 30px rgba(255, 69, 0, 0.55);
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .knowledge-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 64px;
                left: 0;
                right: 0;
                background: rgba(11, 11, 11, 0.98);
                flex-direction: column;
                padding: 16px;
                border-bottom: 1px solid var(--border);
                gap: 2px;
            }
            .nav-links.show {
                display: flex;
            }
            .nav-links a {
                border-radius: var(--radius-sm);
                padding: 12px 16px;
            }
            .nav-actions {
                display: none;
            }
            .nav-actions.show {
                display: flex;
                position: absolute;
                top: 280px;
                left: 0;
                right: 0;
                padding: 16px;
                background: rgba(11, 11, 11, 0.98);
                border-bottom: 1px solid var(--border);
                flex-direction: row;
                gap: 10px;
                justify-content: center;
            }
            .mobile-toggle {
                display: block;
            }
            .hero-content {
                grid-template-columns: 1fr;
            }
            .hero-visual {
                order: -1;
            }
            .steps-grid {
                grid-template-columns: 1fr 1fr;
            }
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-stats {
                flex-wrap: wrap;
                gap: 16px;
            }
            .section-header h2 {
                font-size: 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            .hero-text h1 {
                font-size: 1.7rem;
            }
            .nav-logo {
                font-size: 0.9rem;
            }
            .nav-logo i {
                font-size: 1.1rem;
            }
            .btn-signup,
            .btn-login {
                font-size: 0.8rem;
                padding: 8px 14px;
            }
            .fab {
                left: 10px;
                bottom: 80px;
                width: 44px;
                height: 44px;
                font-size: 1.1rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #0B0B0B;
            --bg-secondary: #161616;
            --accent-primary: #FF4500;
            --accent-secondary: #FF0000;
            --text-primary: #FFFFFF;
            --text-secondary: #CCCCCC;
            --text-muted: #999999;
            --border-color: #333333;
            --card-bg: #1A1A1A;
            --shadow-lg: 0 10px 40px rgba(255,69,0,0.15);
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            overflow-x: hidden;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11,11,11,0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-color);
            z-index: 1000;
            padding: 0;
        }
        .nav {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 800;
            color: var(--text-primary);
            text-decoration: none;
            letter-spacing: -0.3px;
        }
        .nav-logo i {
            color: var(--accent-primary);
            font-size: 1.5rem;
        }
        .nav-links {
            display: flex;
            list-style: none;
            gap: 32px;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 0.95rem;
            font-weight: 500;
            transition: color 0.22s;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--accent-primary);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -6px;
            left: 50%;
            transform: translateX(-50%);
            width: 18px;
            height: 3px;
            background: var(--accent-primary);
            border-radius: 2px;
        }
        .nav-actions {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--text-secondary);
            color: var(--text-primary);
            padding: 8px 20px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.22s;
        }
        .btn-login:hover {
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            border: none;
            color: #FFFFFF;
            padding: 10px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 700;
            cursor: pointer;
            transition: all 0.22s;
            box-shadow: 0 4px 16px rgba(255,69,0,0.35);
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255,69,0,0.5);
        }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
            margin-bottom: 36px;
        }
        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-primary);
        }
        .footer-col a,
        .footer-col p {
            display: block;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.9rem;
            margin-bottom: 10px;
            transition: color 0.22s;
        }
        .footer-col a:hover {
            color: var(--accent-primary);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }
        @media (max-width: 1024px) {
            .nav-links { gap: 20px; }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-actions { display: none; }
            .nav-links.show {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 68px;
                left: 0;
                width: 100%;
                background: rgba(11,11,11,0.98);
                backdrop-filter: blur(18px);
                padding: 20px;
                gap: 16px;
                border-bottom: 1px solid var(--border-color);
            }
            .nav-actions.show {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 280px;
                left: 0;
                width: 100%;
                background: rgba(11,11,11,0.98);
                backdrop-filter: blur(18px);
                padding: 0 20px 20px;
                gap: 12px;
                border-bottom: 1px solid var(--border-color);
            }
            .mobile-toggle { display: block; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 520px) {
            .footer-grid { grid-template-columns: 1fr; }
            .nav-logo { font-size: 1rem; }
        }