/* roulang page: index */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --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;
        }

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

        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

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

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

        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
        }

        p {
            color: var(--text-secondary);
            margin-bottom: 1rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }

        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }
        @keyframes pulse-hot {
            0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.5); }
            70% { box-shadow: 0 0 0 12px rgba(244, 63, 94, 0); }
            100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }
        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
        }

        .section-padding {
            padding: 4rem 0;
        }

        .section-header {
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }

        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }
        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }
        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            transition: all var(--transition-fast);
            font-size: 0.95rem;
            border-radius: var(--radius-sm);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.15);
        }

        .hero-section {
            background: radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
            padding: 5rem 0 4rem;
            position: relative;
            overflow: hidden;
        }
        .hero-code-block {
            background: #0B132B;
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 1.25rem;
            font-family: 'Fira Code', 'Courier New', monospace;
            color: var(--accent-glow);
            font-size: 0.85rem;
            box-shadow: inset 0 0 20px rgba(37, 99, 235, 0.1);
        }

        .countdown-badge {
            background: var(--bg-card);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 1rem 2rem;
            display: inline-flex;
            align-items: center;
            gap: 1.2rem;
            box-shadow: var(--shadow-glow);
        }
        .countdown-digit {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-glow);
            background: rgba(37, 99, 235, 0.15);
            padding: 0.3rem 0.75rem;
            border-radius: var(--radius-sm);
        }

        .highlight-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.75rem;
        }

        .steps-flow {
            display: flex;
            flex-wrap: wrap;
            gap: 2rem;
            justify-content: space-between;
        }
        .step-item {
            flex: 1 1 200px;
            text-align: left;
            position: relative;
            padding-left: 3rem;
        }
        .step-number {
            position: absolute;
            left: 0;
            top: 0;
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-primary);
            opacity: 0.4;
            line-height: 1;
        }

        .reward-table {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            overflow: hidden;
        }
        .reward-table .row-item {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
        }

        .testimonial-bubble {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
            border-left: 4px solid var(--accent-primary);
        }

        .footer {
            background: #020617;
            border-top: 1px solid rgba(37, 99, 235, 0.3);
            padding: 3rem 0 1.5rem;
            color: var(--text-secondary);
        }

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 90;
            width: 56px;
            height: 56px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-radius: 9999px;
            border: 2px solid var(--accent-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 22px rgba(56, 189, 248, 0.5);
            transition: all var(--transition-smooth);
            color: var(--accent-glow);
            font-size: 1.5rem;
            cursor: pointer;
        }
        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.75);
            background: var(--accent-primary);
            color: #FFF;
        }

        @media screen and (max-width: 1024px) {
            .section-header h2 { font-size: 1.9rem; }
            .hero-code-block { font-size: 0.75rem; }
        }
        @media screen and (max-width: 768px) {
            .section-padding { padding: 2.5rem 0; }
            .section-header h2 { font-size: 1.7rem; }
            .container-fluid { padding-left: 1rem; padding-right: 1rem; }
            .top-nav .menu { background: var(--bg-surface); }
            .steps-flow { flex-direction: column; gap: 2rem; }
        }
        @media screen and (max-width: 520px) {
            .countdown-digit { font-size: 1.5rem; padding: 0.2rem 0.5rem; }
        }

/* roulang page: article */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

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

        a:hover {
            color: var(--text-primary);
            text-decoration: none;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }

        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }

        @keyframes pulse-hot {
            0%,
            100% {
                box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            }
            50% {
                box-shadow: 0 6px 28px rgba(244, 63, 94, 0.7);
            }
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }

        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
        }

        .section-padding {
            padding: 4rem 0;
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-header h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }

        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }

        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }

        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            font-size: 0.95rem;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.15);
        }

        .footer {
            background: var(--bg-surface);
            border-top: 1px solid rgba(37, 99, 235, 0.2);
            padding: 3rem 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }

        .footer h4,
        .footer h5 {
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

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

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

        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 28px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 22px rgba(56, 189, 248, 0.45);
            transition: all var(--transition-smooth);
            cursor: pointer;
            animation: floatBreath 3s infinite ease-in-out;
        }

        .fab-float::before {
            content: '';
            position: absolute;
            inset: 0;
            border-radius: 28px;
            padding: 2px;
            background: linear-gradient(135deg, #A3E635, #06B6D4);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
        }

        .fab-float i {
            font-size: 1.6rem;
            color: #A3E635;
            z-index: 2;
        }

        .fab-float:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(6, 182, 212, 0.65);
        }

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

        @keyframes floatBreath {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

        .article-hero {
            position: relative;
            padding: 5rem 0 3rem;
            background: linear-gradient(180deg, rgba(8, 18, 41, 0.9) 0%, var(--bg-deep) 100%);
            border-bottom: 1px solid var(--border-subtle);
        }

        .article-hero .breadcrumb {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 1.5rem;
        }

        .article-hero .breadcrumb a {
            color: var(--accent-glow);
        }

        .article-hero h1 {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.2;
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            color: var(--text-secondary);
            font-size: 0.9rem;
            flex-wrap: wrap;
        }

        .pull-quote {
            background: var(--bg-card);
            border-left: 4px solid var(--accent-primary);
            padding: 1.5rem 2rem;
            margin: 2rem 0;
            border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
            font-size: 1.15rem;
            font-style: italic;
            color: var(--text-holo);
        }

        .article-body {
            font-size: 1.05rem;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        .article-body h2 {
            font-size: 1.8rem;
            color: var(--text-primary);
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }

        .article-body h3 {
            font-size: 1.4rem;
            color: var(--accent-glow);
            margin-top: 2rem;
            margin-bottom: 0.75rem;
        }

        .article-body p {
            margin-bottom: 1.25rem;
        }

        .article-body ul,
        .article-body ol {
            margin-left: 1.5rem;
            margin-bottom: 1.5rem;
        }

        .article-body li {
            margin-bottom: 0.5rem;
        }

        .related-section {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
        }

        .cta-strip {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.2), rgba(56, 189, 248, 0.1));
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 2.5rem;
            text-align: center;
        }

        @media (max-width: 1024px) {
            .article-hero h1 {
                font-size: 2.2rem;
            }
            .section-header h2 {
                font-size: 1.8rem;
            }
        }

        @media (max-width: 768px) {
            .article-hero {
                padding: 3rem 0 2rem;
            }
            .article-hero h1 {
                font-size: 1.8rem;
            }
            .section-padding {
                padding: 2.5rem 0;
            }
            .top-nav .grid-x {
                flex-wrap: wrap;
            }
        }

        @media (max-width: 520px) {
            .article-hero h1 {
                font-size: 1.5rem;
            }
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 0.5rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }

        a {
            color: var(--accent-glow);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--text-primary);
            text-decoration: none;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }
        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }
        @keyframes pulse-hot {
            0%,
            100% {
                box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            }
            50% {
                box-shadow: 0 6px 28px rgba(244, 63, 94, 0.7);
            }
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }
        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            border-color: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
        }

        .section-padding {
            padding: 4rem 0;
        }
        .section-header {
            margin-bottom: 3rem;
        }
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }

        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }
        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }
        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            transition: color var(--transition-fast);
            display: inline-block;
        }
        .nav-link:hover,
        .nav-link.active {
            color: var(--accent-glow);
        }
        .nav-link.active {
            background: rgba(37, 99, 235, 0.1);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
        }

        .hero-bg {
            background: linear-gradient(135deg, #081229 0%, #030712 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            background-blend-mode: overlay;
            position: relative;
            overflow: hidden;
        }
        .hero-bg::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 30% 40%, rgba(37, 99, 235, 0.15), transparent 60%);
        }

        .game-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 1.5rem;
        }
        .game-card-img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-radius: var(--radius-md);
            margin-bottom: 0.75rem;
        }

        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .feature-list li {
            padding: 0.75rem 0;
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            display: flex;
            align-items: flex-start;
            gap: 0.75rem;
        }
        .feature-list li:last-child {
            border-bottom: none;
        }
        .feature-list li i {
            color: var(--accent-primary);
            margin-top: 0.25rem;
            font-size: 1.2rem;
        }

        .benefit-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 2rem 1.5rem;
            border: 1px solid var(--border-subtle);
            text-align: center;
            transition: all var(--transition-smooth);
        }
        .benefit-card:hover {
            border-color: var(--accent-primary);
            box-shadow: var(--shadow-glow);
        }
        .benefit-card i {
            font-size: 2.5rem;
            color: var(--accent-primary);
            margin-bottom: 1rem;
        }

        .footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            padding: 2rem 0;
            margin-top: 4rem;
        }
        .footer h4,
        .footer h5 {
            color: var(--text-primary);
            margin-bottom: 1rem;
        }
        .footer a {
            color: var(--text-secondary);
            display: inline-block;
            margin-bottom: 0.4rem;
        }
        .footer a:hover {
            color: var(--accent-glow);
        }
        .footer hr {
            border-color: rgba(37, 99, 235, 0.2);
        }

        /* FAB */
        .fab-float {
            position: fixed;
            left: 1.5rem;
            bottom: 1.5rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #2563EB, #38BDF8);
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.45);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #FFF;
            font-size: 1.5rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            animation: gentle-bob 3s infinite;
            border: 2px solid rgba(255, 255, 255, 0.2);
        }
        .fab-float:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.7);
        }
        @keyframes gentle-bob {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-6px);
            }
        }

        @media screen and (max-width: 768px) {
            .section-header h2 {
                font-size: 1.8rem;
            }
            .game-grid {
                grid-template-columns: 1fr;
            }
            .benefit-card {
                margin-bottom: 1rem;
            }
            .top-nav .show-for-medium {
                display: none !important;
            }
            .mobile-menu-trigger {
                display: block !important;
            }
        }
        @media screen and (min-width: 769px) {
            .mobile-menu-trigger {
                display: none !important;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.65;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            margin: 0;
            padding: 0;
        }

        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            max-width: 1200px;
            margin: 0 auto;
        }

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

        a:hover {
            color: var(--text-primary);
            text-decoration: none;
        }

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

        h1, h2, h3, h4, h5, h6 {
            color: var(--text-primary);
            font-weight: 700;
            line-height: 1.3;
            margin-top: 0;
        }

        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 1rem;
        }

        h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }

        h3 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
            line-height: 1.2;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }

        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }

        @keyframes pulse-hot {
            0% { box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4); }
            50% { box-shadow: 0 8px 28px rgba(244, 63, 94, 0.65); }
            100% { box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4); }
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }

        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

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

        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
            padding: 1.5rem;
        }

        .section-padding {
            padding: 4rem 0;
        }

        .section-header {
            margin-bottom: 2.5rem;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
        }

        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }

        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }

        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            font-size: 0.95rem;
        }

        .nav-link:hover {
            color: #FFFFFF;
            background: rgba(37, 99, 235, 0.1);
        }

        .nav-link.active {
            color: var(--accent-glow);
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid var(--border-subtle);
        }

        .footer {
            background: var(--bg-surface);
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 2rem;
            margin-top: 2rem;
            color: var(--text-secondary);
        }

        .footer h4, .footer h5 {
            color: var(--text-primary);
            margin-bottom: 1rem;
        }

        .footer a {
            color: var(--text-holo);
            line-height: 2;
        }

        .footer a:hover {
            color: #FFFFFF;
        }

        .footer hr {
            margin: 2rem 0 1.5rem;
        }

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 9999px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            color: var(--accent-glow);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            transition: all var(--transition-smooth);
            animation: fabPulse 2.5s infinite;
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(6, 182, 212, 0.7);
            color: #FFFFFF;
        }

        @keyframes fabPulse {
            0% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.45); }
            50% { box-shadow: 0 0 30px rgba(56, 189, 248, 0.75); }
            100% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.45); }
        }

        .bg-cover {
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
            z-index: 0;
        }

        .overlay-dark {
            background: rgba(3, 7, 18, 0.7);
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: 1;
        }

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

        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .section-padding { padding: 3rem 0; }
        }

        @media (max-width: 768px) {
            h1 { font-size: 1.8rem; }
            h2 { font-size: 1.5rem; }
            .container-fluid { padding-left: 1rem; padding-right: 1rem; }
            .section-padding { padding: 2.5rem 0; }
            .top-nav .grid-x { flex-wrap: wrap; }
            .nav-logo { font-size: 1.2rem; }
        }

        @media (max-width: 520px) {
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.3rem; }
            .btn { padding: 0.65rem 1.3rem; font-size: 0.8rem; }
        }

/* roulang page: category3 */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }

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

        a:hover {
            color: var(--text-primary);
            text-decoration: none;
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }

        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }

        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }

        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }

        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }

        @keyframes pulse-hot {
            0%,
            100% {
                box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            }
            50% {
                box-shadow: 0 6px 28px rgba(244, 63, 94, 0.65);
            }
        }

        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }

        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }

        .tag-gold {
            background: rgba(245, 158, 11, 0.2);
            color: #FDE68A;
            border-color: rgba(245, 158, 11, 0.4);
        }

        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
        }

        .section-padding {
            padding: 4rem 0;
        }

        .section-header {
            margin-bottom: 3rem;
            text-align: left;
        }

        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
            line-height: 1.3;
        }

        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }

        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }

        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }

        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--accent-glow);
            background: rgba(37, 99, 235, 0.1);
        }

        .hero-cat {
            background: linear-gradient(135deg, #0F172A 0%, #081229 100%);
            position: relative;
            overflow: hidden;
            padding: 3rem 0;
        }

        .hero-cat::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 30% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .promo-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.75rem;
            position: relative;
            overflow: hidden;
            transition: all var(--transition-smooth);
            height: 100%;
        }

        .promo-card:hover {
            border-color: var(--accent-primary);
            box-shadow: 0 8px 30px rgba(37, 99, 235, 0.2);
            transform: translateY(-4px);
        }

        .promo-card .promo-badge {
            position: absolute;
            top: 1rem;
            right: 1rem;
            z-index: 2;
        }

        .promo-card .promo-icon {
            font-size: 2.8rem;
            margin-bottom: 1rem;
        }

        .promo-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .promo-card .promo-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-primary);
            margin: 0.75rem 0;
        }

        .divider-glow {
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-glow), transparent);
            margin: 1.5rem 0;
            opacity: 0.4;
        }

        .step-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .step-list li {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1rem 0;
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
        }

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

        .step-num {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            flex-shrink: 0;
            color: #FFF;
        }

        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 1.25rem 1.5rem;
            margin-bottom: 1rem;
            transition: all var(--transition-smooth);
            cursor: pointer;
        }

        .faq-item:hover {
            border-color: var(--accent-glow);
            box-shadow: 0 0 15px rgba(37, 99, 235, 0.1);
        }

        .faq-item h4 {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.5rem;
            color: var(--text-primary);
        }

        .faq-item p {
            color: var(--text-secondary);
            margin: 0;
            font-size: 0.95rem;
        }

        .cta-strip {
            background: linear-gradient(135deg, #0F172A, #1E293B);
            border: 1px solid var(--border-glow);
            border-radius: var(--radius-xl);
            padding: 2.5rem 2rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-strip::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--accent-glow), var(--accent-primary), transparent);
        }

        .footer {
            background: #020617;
            padding: 3rem 0 1.5rem;
            border-top: 2px solid rgba(37, 99, 235, 0.3);
            margin-top: 2rem;
        }

        .footer h4,
        .footer h5 {
            color: var(--text-primary);
            font-weight: 700;
            margin-bottom: 1rem;
        }

        .footer a,
        .footer p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 2;
        }

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

        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--border-glow);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
            transition: all var(--transition-smooth);
            cursor: pointer;
            font-size: 1.5rem;
            color: var(--accent-glow);
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.55);
            border-color: var(--accent-primary);
        }

        @media (max-width: 768px) {
            .top-nav .grid-x {
                flex-wrap: wrap;
            }
            .top-nav .nav-logo {
                margin-bottom: 0.5rem;
            }
            .top-nav .show-for-medium {
                display: flex !important;
                flex-wrap: wrap;
                gap: 0.25rem;
            }
            .top-nav .nav-link {
                font-size: 0.8rem;
                padding: 0.4rem 0.6rem;
            }
            .section-header h2 {
                font-size: 1.7rem;
            }
            .promo-card {
                margin-bottom: 1rem;
            }
            .hero-cat {
                padding: 2rem 0;
            }
            .fab-left {
                left: 1rem;
                bottom: 5rem;
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
            }
        }

        @media (max-width: 520px) {
            .container-fluid {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .btn {
                padding: 0.6rem 1.25rem;
                font-size: 0.8rem;
            }
        }

/* roulang page: category4 */
:root {
            --bg-deep: #030712;
            --bg-surface: #081229;
            --bg-card: #0F172A;
            --accent-primary: #2563EB;
            --accent-glow: #38BDF8;
            --accent-hot: #F43F5E;
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(37, 99, 235, 0.25);
            --border-glow: rgba(56, 189, 248, 0.35);
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.5);
            --shadow-glow: 0 0 20px rgba(37, 99, 235, 0.15);
            --radius-sm: 0.5rem;
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Inter', 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }
        
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        
        body {
            font-family: var(--font-body);
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        
        .container-fluid {
            padding-left: 1.5rem;
            padding-right: 1.5rem;
            max-width: 1320px;
            margin: 0 auto;
        }
        
        a {
            color: var(--accent-glow);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        
        a:hover {
            color: var(--text-primary);
            text-decoration: none;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 0.75rem 1.75rem;
            font-weight: 600;
            border-radius: var(--radius-md);
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-transform: uppercase;
            letter-spacing: 0.025em;
            font-size: 0.9rem;
            gap: 0.5rem;
            border: none;
            outline: none;
            position: relative;
            overflow: hidden;
        }
        
        .btn-primary {
            background: linear-gradient(135deg, var(--accent-primary), #1D4ED8);
            color: #FFFFFF;
            box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
            border: 1px solid var(--border-subtle);
        }
        
        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-primary));
            box-shadow: 0 6px 25px rgba(56, 189, 248, 0.45);
            transform: translateY(-2px);
            color: #FFFFFF;
        }
        
        .btn-primary:active {
            transform: translateY(1px);
            box-shadow: 0 2px 10px rgba(37, 99, 235, 0.2);
        }
        
        .btn-outline {
            background: transparent;
            border: 1.5px solid var(--border-glow);
            color: var(--accent-glow);
            box-shadow: none;
        }
        
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.1);
            border-color: var(--accent-primary);
            color: #FFFFFF;
            box-shadow: 0 0 15px rgba(56, 189, 248, 0.25);
            transform: translateY(-2px);
        }
        
        .btn-hot {
            background: linear-gradient(135deg, #DC2626, #991B1B);
            color: #FFF;
            box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            border: 1px solid rgba(244, 63, 94, 0.3);
            animation: pulse-hot 2.2s infinite;
        }
        
        @keyframes pulse-hot {
            0%,
            100% {
                box-shadow: 0 4px 18px rgba(220, 38, 38, 0.4);
            }
            50% {
                box-shadow: 0 6px 28px rgba(244, 63, 94, 0.65);
            }
        }
        
        .tag {
            display: inline-flex;
            align-items: center;
            padding: 0.25rem 0.75rem;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 9999px;
            text-transform: uppercase;
            letter-spacing: 0.04em;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-glow);
            border: 1px solid var(--border-subtle);
        }
        
        .tag-hot {
            background: rgba(220, 38, 38, 0.2);
            color: #FCA5A5;
            border-color: rgba(220, 38, 38, 0.4);
        }
        
        .card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        
        .card:hover {
            border-color: var(--accent-glow);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }
        
        .glass-card {
            background: rgba(15, 23, 42, 0.6);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
        }
        
        .section-padding {
            padding: 4rem 0;
        }
        
        .section-header {
            margin-bottom: 3rem;
        }
        
        .section-header h2 {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 0.75rem;
            color: var(--text-primary);
        }
        
        .section-header p {
            font-size: 1.1rem;
            max-width: 700px;
            color: var(--text-secondary);
        }
        
        .top-nav {
            background: rgba(8, 18, 41, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            position: sticky;
            top: 0;
            z-index: 100;
            padding: 0.75rem 0;
        }
        
        .nav-logo {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-glow);
            letter-spacing: -0.02em;
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .nav-logo i {
            font-size: 1.8rem;
            color: var(--accent-primary);
        }
        
        .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
        }
        
        .nav-link:hover,
        .nav-link.active {
            color: var(--accent-glow);
            background: rgba(37, 99, 235, 0.1);
        }
        
        .hero-section {
            position: relative;
            min-height: 550px;
            display: flex;
            align-items: center;
            overflow: hidden;
            background: linear-gradient(135deg, #020617, #0B1424, #06102A);
        }
        
        .hero-bg-video-wrap {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            overflow: hidden;
            z-index: 0;
        }
        
        .hero-bg-video-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            opacity: 0.45;
            filter: brightness(0.5) saturate(1.2);
        }
        
        .hero-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(3, 7, 18, 0.6) 0%, rgba(11, 20, 36, 0.85) 100%);
            z-index: 1;
        }
        
        .hero-content {
            position: relative;
            z-index: 2;
            padding: 3rem 0;
        }
        
        .play-btn-circle {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), #38BDF8);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 30px rgba(56, 189, 248, 0.5);
            transition: all var(--transition-smooth);
            font-size: 2rem;
            color: #FFF;
        }
        
        .play-btn-circle:hover {
            transform: scale(1.08);
            box-shadow: 0 0 45px rgba(56, 189, 248, 0.7);
        }
        
        .promo-card {
            background: rgba(15, 23, 42, 0.7);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid rgba(37, 99, 235, 0.3);
            border-radius: var(--radius-xl);
            padding: 2rem;
            transition: all var(--transition-smooth);
            position: relative;
        }
        
        .promo-card:hover {
            border-color: var(--accent-glow);
            box-shadow: 0 8px 32px rgba(37, 99, 235, 0.2);
            transform: translateY(-4px);
        }
        
        .promo-icon {
            font-size: 2.5rem;
            color: var(--accent-glow);
            margin-bottom: 1rem;
        }
        
        .countdown-bar {
            background: rgba(244, 63, 94, 0.15);
            border: 1px solid rgba(244, 63, 94, 0.35);
            border-radius: var(--radius-md);
            padding: 1rem;
            display: flex;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        
        .countdown-timer {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-hot);
            letter-spacing: 0.05em;
        }
        
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 1rem;
            padding: 1.25rem 0;
            border-bottom: 1px solid var(--border-subtle);
        }
        
        .step-item:last-child {
            border-bottom: none;
        }
        
        .step-num {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), #38BDF8);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            flex-shrink: 0;
        }
        
        .event-highlight {
            background: linear-gradient(135deg, rgba(220, 38, 38, 0.12), rgba(244, 63, 94, 0.08));
            border-left: 4px solid var(--accent-hot);
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            padding: 1.5rem;
        }
        
        .footer {
            background: var(--bg-surface);
            padding: 3rem 0 2rem;
            border-top: 1px solid var(--border-subtle);
            margin-top: 3rem;
        }
        
        .footer h4,
        .footer h5 {
            color: var(--accent-glow);
            font-weight: 700;
            margin-bottom: 1rem;
        }
        
        .footer p,
        .footer a {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        
        .footer a:hover {
            color: var(--accent-glow);
        }
        
        @media (max-width: 1024px) {
            .section-header h2 {
                font-size: 1.8rem;
            }
            .hero-section {
                min-height: 420px;
            }
        }
        
        @media (max-width: 768px) {
            .section-padding {
                padding: 2.5rem 0;
            }
            .section-header {
                margin-bottom: 2rem;
            }
            .section-header h2 {
                font-size: 1.6rem;
            }
            .promo-card {
                padding: 1.25rem;
            }
            .countdown-bar {
                flex-direction: column;
                align-items: flex-start;
            }
        }
        
        @media (max-width: 520px) {
            .container-fluid {
                padding-left: 1rem;
                padding-right: 1rem;
            }
            .hero-section {
                min-height: 360px;
            }
            .play-btn-circle {
                width: 60px;
                height: 60px;
                font-size: 1.5rem;
            }
        }