/* roulang page: index */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        h1, h2, h3, h4, h5 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-white);
        }
        h1 {
            font-size: 2.8rem;
            letter-spacing: -0.02em;
        }
        h2 {
            font-size: 2rem;
            position: relative;
            display: inline-block;
        }
        h2::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -8px;
            width: 60px;
            height: 4px;
            background: var(--btn-gradient);
            border-radius: 2px;
        }
        h3 {
            font-size: 1.4rem;
        }
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-blue);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (min-width: 1400px) {
            .container-custom {
                max-width: 1320px;
            }
        }
        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.4);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
        }
        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
        }
        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.06), transparent);
            transition: left 0.8s ease;
        }
        .glass-card:hover::before {
            left: 100%;
        }
        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
            transform: translateY(-6px);
        }
        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            padding: 12px 0;
            z-index: 1000;
            transition: background var(--transition-fast);
        }
        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 4px;
        }
        .navbar-custom .nav-link:hover, .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }
        .navbar-toggler-icon {
            filter: invert(1);
        }
        .hero-section {
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 30% 50%, rgba(0, 82, 255, 0.15) 0%, transparent 60%);
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.22;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-block;
            margin-bottom: 20px;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 30px;
            flex-wrap: wrap;
        }
        .hero-stat-item h4 {
            font-size: 1.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-stat-item p {
            color: var(--text-silver);
            margin: 0;
            font-size: 0.9rem;
        }
        .hero-image-wrapper {
            position: relative;
            z-index: 2;
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(0, 240, 255, 0.3);
            border: 1px solid rgba(0, 240, 255, 0.4);
        }
        .section-title {
            margin-bottom: 50px;
        }
        .section-title p {
            color: var(--text-silver);
            font-size: 1.1rem;
            max-width: 700px;
            margin-top: 12px;
        }
        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
        }
        .feature-list {
            display: flex;
            flex-direction: column;
            gap: 28px;
        }
        .feature-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
        }
        .feature-icon {
            width: 56px;
            height: 56px;
            background: var(--btn-gradient);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.8rem;
            flex-shrink: 0;
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.5);
        }
        .faq-item {
            background: var(--bg-navy);
            border: 1px solid rgba(0, 240, 255, 0.15);
            border-radius: 12px;
            margin-bottom: 16px;
            padding: 22px 28px;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 4px 18px rgba(0, 240, 255, 0.2);
        }
        .cta-section {
            background: radial-gradient(circle at center, rgba(0, 82, 255, 0.25) 0%, transparent 70%);
            border: 1px solid rgba(0, 240, 255, 0.3);
            border-radius: 24px;
            padding: 60px 40px;
            text-align: center;
            backdrop-filter: blur(10px);
        }
        .footer-custom {
            background: var(--bg-navy);
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 50px 0 30px;
            color: var(--text-silver);
            font-size: 0.95rem;
        }
        .footer-custom a {
            color: var(--text-silver);
            text-decoration: none;
        }
        .footer-custom a:hover {
            color: var(--accent-cyan);
        }
        .floating-cta-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            width: 100%;
            background: rgba(8, 9, 15, 0.92);
            backdrop-filter: blur(14px);
            z-index: 999;
            padding: 14px 24px;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 20px;
            border-top: 1px solid var(--accent-cyan);
        }
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            background: rgba(0, 0, 0, 0.6);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)), var(--btn-gradient);
            background-origin: border-box;
            background-clip: content-box, border-box;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: #fff;
            box-shadow: 0 0 15px var(--accent-glow);
            transition: all var(--transition-smooth);
            animation: pulse-glow 2s infinite;
        }
        @keyframes pulse-glow {
            0% { box-shadow: 0 0 8px var(--accent-glow); }
            50% { box-shadow: 0 0 24px rgba(0,240,255,0.8); }
            100% { box-shadow: 0 0 8px var(--accent-glow); }
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 1);
        }
        @media (max-width: 992px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.7rem; }
            .hero-section { padding: 70px 0 50px; }
            .footer-custom .row > div { margin-bottom: 28px; }
        }
        @media (max-width: 768px) {
            h1 { font-size: 1.9rem; }
            .hero-stats { gap: 20px; }
            .cta-section { padding: 40px 20px; }
            .game-grid { grid-template-columns: 1fr; }
        }

/* roulang page: article */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        
        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        a:hover {
            color: var(--accent-blue);
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        
        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 50px;
            letter-spacing: 0.5px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
            display: inline-block;
        }
        
        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 32px rgba(0, 240, 255, 0.7);
            transform: translateY(-3px);
            color: #fff;
        }
        
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 700;
            padding: 12px 32px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
            display: inline-block;
        }
        
        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 24px var(--accent-glow);
        }
        
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.08), transparent);
            transition: left 0.8s ease;
            z-index: 0;
        }
        
        .glass-card:hover::before {
            left: 100%;
        }
        
        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 12px 40px rgba(0, 240, 255, 0.3);
            transform: translateY(-6px);
        }
        
        .glass-card>* {
            position: relative;
            z-index: 1;
        }
        
        .navbar-custom {
            background: rgba(8, 9, 15, 0.9);
            backdrop-filter: blur(24px);
            -webkit-backdrop-filter: blur(24px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.3);
            padding: 14px 0;
            z-index: 1000;
            transition: background var(--transition-fast);
        }
        
        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        
        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 600;
            padding: 10px 20px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 3px;
            font-size: 0.95rem;
        }
        
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.3);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.4);
        }
        
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.7);
            padding: 6px 10px;
        }
        
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(0, 240, 255, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        
        .text-silver {
            color: var(--text-silver) !important;
        }
        
        .hero-mini {
            padding: 60px 0 40px;
            position: relative;
            background: radial-gradient(circle at 20% 30%, rgba(0, 82, 255, 0.2) 0%, transparent 70%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.15);
        }
        
        .hero-mini::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }
        
        .hero-mini .container-custom {
            position: relative;
            z-index: 1;
        }
        
        .breadcrumb-custom {
            background: transparent;
            padding: 0;
            margin-bottom: 16px;
            font-size: 0.9rem;
        }
        
        .breadcrumb-custom .breadcrumb-item a {
            color: var(--text-silver);
            font-weight: 500;
        }
        
        .breadcrumb-custom .breadcrumb-item.active {
            color: var(--accent-cyan);
            font-weight: 600;
        }
        
        .article-meta-badge {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.4);
            color: var(--accent-cyan);
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
        }
        
        .article-content-wrapper {
            background: rgba(13, 17, 30, 0.5);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 20px;
            border: 1px solid rgba(0, 82, 255, 0.2);
            padding: 48px 40px;
            margin: 40px 0;
        }
        
        .article-content-wrapper h2 {
            font-family: var(--font-heading);
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: 2.5rem;
            margin-bottom: 1.2rem;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid rgba(0, 240, 255, 0.3);
            letter-spacing: -0.2px;
        }
        
        .article-content-wrapper h3 {
            font-family: var(--font-heading);
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--accent-cyan);
            margin-top: 2rem;
            margin-bottom: 1rem;
        }
        
        .article-content-wrapper p {
            color: var(--text-silver);
            line-height: 1.8;
            margin-bottom: 1.5rem;
            font-size: 1.05rem;
        }
        
        .article-content-wrapper ul,
        .article-content-wrapper ol {
            color: var(--text-silver);
            margin-bottom: 1.5rem;
            padding-left: 1.8rem;
        }
        
        .article-content-wrapper li {
            margin-bottom: 0.6rem;
            line-height: 1.7;
        }
        
        .article-content-wrapper strong {
            color: #fff;
            font-weight: 700;
        }
        
        .article-content-wrapper blockquote {
            background: rgba(0, 82, 255, 0.15);
            border-left: 4px solid var(--accent-cyan);
            padding: 18px 24px;
            border-radius: 0 12px 12px 0;
            color: var(--text-silver);
            margin: 2rem 0;
            font-style: italic;
        }
        
        .cta-inline-card {
            background: var(--btn-gradient);
            border-radius: 16px;
            padding: 36px 40px;
            margin: 48px 0;
            text-align: center;
            box-shadow: 0 8px 28px rgba(0, 82, 255, 0.5);
        }
        
        .cta-inline-card h4 {
            color: #fff;
            font-weight: 800;
            font-size: 1.6rem;
            margin-bottom: 12px;
        }
        
        .cta-inline-card p {
            color: rgba(255, 255, 255, 0.85);
            margin-bottom: 24px;
            font-size: 1.05rem;
        }
        
        .author-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: 16px;
            padding: 24px 28px;
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 40px;
        }
        
        .author-avatar {
            width: 64px;
            height: 64px;
            border-radius: 50%;
            background: var(--btn-gradient);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            color: #fff;
            font-weight: 700;
            flex-shrink: 0;
        }
        
        .author-info h5 {
            color: #fff;
            font-weight: 700;
            margin-bottom: 4px;
        }
        
        .author-info span {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        
        .footer-custom {
            background: rgba(8, 9, 15, 0.95);
            border-top: 1px solid rgba(0, 82, 255, 0.25);
            padding: 60px 0 30px;
            margin-top: 80px;
            color: var(--text-silver);
        }
        
        .footer-custom h5 {
            font-family: var(--font-heading);
            font-weight: 700;
            margin-bottom: 16px;
        }
        
        .footer-custom ul li a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        .footer-custom ul li a:hover {
            color: var(--accent-cyan);
        }
        
        .fab-floating {
            position: fixed;
            left: 24px;
            bottom: 96px;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.7);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(0, 0, 0, 0.8), rgba(0, 0, 0, 0.8)), linear-gradient(135deg, #00F0FF, #0052FF);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #00F0FF;
            font-size: 1.6rem;
            z-index: 1050;
            cursor: pointer;
            transition: all 0.3s ease;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            animation: floatBreath 2.5s infinite ease-in-out;
        }
        
        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.9);
            color: #fff;
        }
        
        @keyframes floatBreath {
            0%,
            100% {
                opacity: 0.7;
                transform: translateY(0);
            }
            50% {
                opacity: 1;
                transform: translateY(-4px);
            }
        }
        
        @media (max-width: 992px) {
            .navbar-custom .nav-link {
                padding: 10px 16px;
                margin: 4px 0;
                text-align: center;
            }
            .article-content-wrapper {
                padding: 32px 20px;
                border-radius: 16px;
            }
            .article-content-wrapper h2 {
                font-size: 1.5rem;
            }
            .cta-inline-card {
                padding: 28px 24px;
            }
            .fab-floating {
                left: 16px;
                bottom: 80px;
                width: 48px;
                height: 48px;
                font-size: 1.4rem;
            }
        }
        
        @media (max-width: 576px) {
            .hero-mini {
                padding: 40px 0 24px;
            }
            .navbar-brand-logo {
                font-size: 1.2rem;
            }
            .author-card {
                flex-direction: column;
                text-align: center;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --accent-hot: #FF0055;
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

        .container-custom {
            width: 100%;
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Buttons */
        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.4);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
        }
        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
        }
        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .btn-hot {
            background: var(--accent-hot);
            border: none;
            color: #fff;
            font-weight: 700;
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            box-shadow: 0 0 18px rgba(255, 0, 85, 0.5);
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0% { box-shadow: 0 0 12px rgba(255, 0, 85, 0.5); }
            50% { box-shadow: 0 0 28px rgba(255, 0, 85, 0.85); }
            100% { box-shadow: 0 0 12px rgba(255, 0, 85, 0.5); }
        }

        /* Glass Card */
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.06), transparent);
            transition: left 0.8s ease;
        }
        .glass-card:hover::before {
            left: 100%;
        }
        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
            transform: translateY(-6px);
        }

        /* Navigation */
        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            padding: 12px 0;
            z-index: 1000;
        }
        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 4px;
        }
        .navbar-custom .nav-link:hover, .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }
        .navbar-toggler-icon {
            filter: invert(1);
        }
        .text-silver {
            color: var(--text-silver);
        }

        /* Hero Section */
        .hero-section {
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 30% 50%, rgba(0, 82, 255, 0.15) 0%, transparent 60%);
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            opacity: 0.22;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255, 0, 85, 0.15);
            border: 1px solid var(--accent-hot);
            color: var(--accent-hot);
            padding: 6px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 20px;
        }
        .hero-stats {
            display: flex;
            gap: 30px;
            margin-top: 30px;
        }
        .hero-stat-item {
            text-align: left;
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--accent-cyan);
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        /* Review Card */
        .review-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: 20px;
            padding: 28px;
            margin-bottom: 30px;
            display: flex;
            gap: 20px;
            align-items: flex-start;
            transition: all var(--transition-smooth);
        }
        .review-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 10px 40px rgba(0, 240, 255, 0.2);
            transform: translateY(-4px);
        }
        .review-rank {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1;
            min-width: 60px;
        }
        .review-content {
            flex: 1;
        }
        .review-score {
            display: flex;
            gap: 15px;
            flex-wrap: wrap;
            margin: 15px 0;
        }
        .score-item {
            background: rgba(0, 82, 255, 0.1);
            border-radius: 12px;
            padding: 10px 18px;
        }
        .score-number {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--accent-cyan);
        }
        .score-label {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* FAQ Section */
        .accordion-custom .accordion-item {
            background: transparent;
            border: 1px solid var(--border-glass);
            border-radius: 12px !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .accordion-custom .accordion-button {
            background: var(--bg-card);
            color: var(--text-silver);
            font-weight: 600;
            box-shadow: none;
            padding: 18px 24px;
        }
        .accordion-custom .accordion-button:not(.collapsed) {
            background: rgba(0, 82, 255, 0.15);
            color: #fff;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .accordion-custom .accordion-body {
            background: var(--bg-card);
            color: var(--text-muted);
            padding: 16px 24px 24px;
        }

        /* Footer */
        .footer-custom {
            background: #06070A;
            border-top: 1px solid rgba(0, 82, 255, 0.25);
            padding: 50px 0 30px;
            margin-top: 80px;
        }
        .footer-custom a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
        }
        .footer-custom a:hover {
            color: var(--accent-cyan);
        }

        /* Responsive */
        @media (max-width: 992px) {
            .review-card {
                flex-direction: column;
            }
            .hero-stats {
                flex-wrap: wrap;
            }
        }
        @media (max-width: 768px) {
            .hero-section {
                padding: 70px 0 50px;
            }
            .navbar-brand-logo {
                font-size: 1.2rem;
            }
        }

@keyframes floatFAB {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (min-width: 1400px) {
            .container-custom {
                max-width: 1320px;
            }
        }

        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.4);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
        }

        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
        }

        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.06), transparent);
            transition: left 0.8s ease;
        }

        .glass-card:hover::before {
            left: 100%;
        }

        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
            transform: translateY(-6px);
        }

        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            padding: 12px 0;
            z-index: 1000;
            transition: background var(--transition-fast);
        }

        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }

        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 4px;
        }

        .navbar-custom .nav-link:hover, .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }

        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        .hero-section {
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 30% 50%, rgba(0, 82, 255, 0.15) 0%, transparent 60%);
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }

        .hero-content {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            background: rgba(0, 240, 255, 0.15);
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 6px 18px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            display: inline-block;
            margin-bottom: 1.5rem;
        }

        .text-silver {
            color: var(--text-silver);
        }

        .text-muted {
            color: var(--text-muted);
        }

        .promo-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            padding: 2rem;
            transition: all var(--transition-smooth);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .promo-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 12px 28px rgba(0, 240, 255, 0.2);
            transform: translateY(-8px);
        }

        .promo-icon {
            font-size: 2.8rem;
            background: var(--btn-gradient);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 1.2rem;
        }

        .footer-custom {
            background: var(--bg-navy);
            border-top: 1px solid var(--border-glass);
            padding: 3rem 0 1.5rem;
            margin-top: var(--section-gap);
            color: var(--text-silver);
        }

        .footer-custom h5 {
            color: #fff;
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .footer-custom a {
            color: var(--text-muted);
            text-decoration: none;
            transition: color var(--transition-fast);
        }

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

        .faq-item {
            background: transparent;
            border: none;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            padding: 1.5rem 0;
        }

        .faq-question {
            font-weight: 600;
            font-size: 1.2rem;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            color: #fff;
        }

        .faq-answer {
            margin-top: 1rem;
            color: var(--text-silver);
            line-height: 1.7;
        }

        .value-prop-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            margin-bottom: 2rem;
        }

        .value-prop-icon {
            color: var(--accent-cyan);
            font-size: 1.8rem;
            flex-shrink: 0;
            margin-top: 4px;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 80px 0 60px;
                text-align: center;
            }

            .hero-image {
                margin-top: 2.5rem;
            }

            .navbar-brand-logo {
                font-size: 1.2rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }
        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.6;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }
        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-blue);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (min-width: 1400px) {
            .container-custom {
                max-width: 1320px;
            }
        }
        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.4);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
        }
        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
        }
        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 20px var(--accent-glow);
        }
        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.06), transparent);
            transition: left 0.8s ease;
        }
        .glass-card:hover::before {
            left: 100%;
        }
        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
            transform: translateY(-6px);
        }
        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            padding: 12px 0;
            z-index: 1000;
            transition: background var(--transition-fast);
        }
        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }
        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 4px;
        }
        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }
        .navbar-toggler-icon {
            filter: invert(1);
        }
        .text-silver {
            color: var(--text-silver);
        }
        .hero-promo-section {
            padding: 100px 0 80px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 70% 40%, rgba(255, 215, 0, 0.12) 0%, transparent 55%);
        }
        .hero-promo-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .section-title {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 2.4rem;
            margin-bottom: 1.5rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.3;
        }
        .section-subtitle {
            color: var(--text-silver);
            font-size: 1.15rem;
            max-width: 700px;
        }
        .promo-card {
            background: rgba(13, 17, 30, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 215, 0, 0.25);
            border-radius: var(--card-radius);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
            position: relative;
        }
        .promo-card:hover {
            border-color: #FFD700;
            box-shadow: 0 10px 36px rgba(255, 215, 0, 0.2);
            transform: translateY(-4px);
        }
        .promo-badge {
            position: absolute;
            top: 16px;
            right: 16px;
            background: linear-gradient(135deg, #FFD700, #FFA500);
            color: #000;
            font-weight: 700;
            font-size: 0.75rem;
            padding: 6px 14px;
            border-radius: 20px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        .promo-value {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 2.2rem;
            color: #FFD700;
            line-height: 1.2;
        }
        .promo-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }
        .timeline-item {
            border-left: 2px solid var(--accent-cyan);
            padding-left: 28px;
            position: relative;
            margin-bottom: 32px;
        }
        .timeline-item::before {
            content: '';
            width: 14px;
            height: 14px;
            background: var(--accent-cyan);
            border-radius: 50%;
            position: absolute;
            left: -8px;
            top: 6px;
            box-shadow: 0 0 16px var(--accent-glow);
        }
        .footer-custom {
            background: var(--bg-navy);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 48px 0 24px;
            margin-top: var(--section-gap);
            color: var(--text-silver);
        }
        .footer-custom a {
            color: var(--text-silver);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        .footer-custom a:hover {
            color: var(--accent-cyan);
        }
        .footer-custom h5 {
            font-weight: 700;
            margin-bottom: 1rem;
        }
        .footer-custom hr {
            border-color: rgba(255, 255, 255, 0.1);
        }
        .fab-custom {
            position: fixed;
            left: 24px;
            bottom: 80px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            cursor: pointer;
        }
        .fab-custom::before {
            content: '';
            position: absolute;
            top: -2px;
            left: -2px;
            right: -2px;
            bottom: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            z-index: -1;
            opacity: 0.9;
        }
        .fab-custom:hover {
            transform: scale(1.12);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
        }
        .fab-custom i {
            font-size: 1.6rem;
            color: #00F0FF;
        }
        @media (max-width: 991px) {
            .navbar-custom .nav-link {
                padding: 10px 16px;
                margin: 4px 0;
            }
            .hero-promo-section {
                padding: 80px 0 60px;
            }
            .section-title {
                font-size: 1.9rem;
            }
            .promo-value {
                font-size: 1.7rem;
            }
        }
        @media (max-width: 576px) {
            .container-custom {
                padding: 0 16px;
            }
            .hero-promo-section {
                padding: 60px 0 40px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .btn-primary-custom {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .fab-custom {
                left: 16px;
                bottom: 64px;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: category4 */
:root {
            --bg-deep: #08090F;
            --bg-navy: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --border-glass: rgba(0, 82, 255, 0.3);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.5);
            --text-white: #FFFFFF;
            --text-silver: #CBD5E1;
            --text-muted: #94A3B8;
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --btn-hover-gradient: linear-gradient(135deg, #00F0FF 0%, #0052FF 100%);
            --card-radius: 16px;
            --section-gap: 5rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        body {
            background: var(--bg-deep);
            color: var(--text-white);
            font-family: var(--font-body);
            line-height: 1.7;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        @media (min-width: 1400px) {
            .container-custom {
                max-width: 1320px;
            }
        }

        .btn-primary-custom {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            font-weight: 600;
            padding: 14px 32px;
            border-radius: 50px;
            letter-spacing: 0.3px;
            font-size: 1rem;
            transition: all var(--transition-smooth);
            box-shadow: 0 4px 18px rgba(0, 82, 255, 0.4);
            text-transform: uppercase;
            position: relative;
            overflow: hidden;
        }

        .btn-primary-custom:hover {
            background: var(--btn-hover-gradient);
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 12px 30px;
            border-radius: 50px;
            transition: all var(--transition-smooth);
            text-transform: uppercase;
            font-size: 0.95rem;
        }

        .btn-outline-custom:hover {
            background: var(--accent-cyan);
            color: var(--bg-deep);
            box-shadow: 0 0 20px var(--accent-glow);
        }

        .glass-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-glass);
            border-radius: var(--card-radius);
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .glass-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(0, 240, 255, 0.06), transparent);
            transition: left 0.8s ease;
        }

        .glass-card:hover::before {
            left: 100%;
        }

        .glass-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: 0 8px 32px rgba(0, 240, 255, 0.25);
            transform: translateY(-6px);
        }

        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            padding: 12px 0;
            z-index: 1000;
            transition: background var(--transition-fast);
        }

        .navbar-brand-logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, #FFFFFF, var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.3px;
        }

        .navbar-custom .nav-link {
            color: var(--text-silver);
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 30px;
            transition: all var(--transition-fast);
            margin: 0 4px;
        }

        .navbar-custom .nav-link:hover,
        .navbar-custom .nav-link.active {
            color: #fff;
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }

        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.5);
            color: var(--accent-cyan);
        }

        .navbar-toggler-icon {
            filter: invert(1);
        }

        .page-header {
            padding: 110px 0 60px;
            position: relative;
            overflow: hidden;
            background: radial-gradient(circle at 70% 30%, rgba(0, 82, 255, 0.18) 0%, transparent 65%);
        }

        .page-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('/assets/images/backpic/back-3.jpg') center/cover no-repeat;
            opacity: 0.18;
            z-index: 0;
        }

        .section-gap {
            padding: var(--section-gap) 0;
        }

        .text-silver {
            color: var(--text-silver);
        }

        .text-muted {
            color: var(--text-muted);
        }

        .text-cyan {
            color: var(--accent-cyan);
        }

        .highlight-box {
            background: rgba(0, 240, 255, 0.05);
            border-left: 4px solid var(--accent-cyan);
            padding: 1.2rem 1.5rem;
            border-radius: 0 12px 12px 0;
        }

        .step-number {
            background: var(--btn-gradient);
            width: 44px;
            height: 44px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: 700;
            font-size: 1.2rem;
            box-shadow: 0 0 16px var(--accent-glow);
        }

        .footer-custom {
            background: var(--bg-navy);
            border-top: 1px solid var(--border-glass);
            padding: 3rem 0 1.5rem;
            font-size: 0.9rem;
            color: var(--text-muted);
        }

        .footer-custom h5 {
            font-weight: 600;
            margin-bottom: 1rem;
        }

        .footer-custom a {
            color: var(--text-silver);
        }

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

        @media (max-width: 768px) {
            .page-header {
                padding: 90px 0 40px;
            }

            .section-gap {
                padding: 3rem 0;
            }

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