/* roulang page: index */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: rgba(15, 12, 32, 0.8);
            --accent-primary: #CCFF00;
            --accent-secondary: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --border-color: rgba(0, 240, 255, 0.2);
            --border-radius: 12px;
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.3);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --font-heading: 'Segoe UI', 'Montserrat', system-ui, sans-serif;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
            --spacing-xs: 0.5rem;
            --spacing-sm: 1rem;
            --spacing-md: 1.5rem;
            --spacing-lg: 2.5rem;
            --spacing-xl: 4rem;
        }

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

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

        h1, h2, h3, h4 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.3;
        }

        a {
            color: var(--accent-secondary);
            text-decoration: none;
            transition: color 0.3s;
        }
        a:hover {
            color: var(--accent-primary);
            text-decoration: underline;
        }

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

        button, .btn {
            cursor: pointer;
            transition: all 0.3s ease;
        }
        button:focus-visible, .btn:focus-visible, a:focus-visible {
            outline: 2px solid var(--accent-secondary);
            outline-offset: 2px;
            border-radius: 4px;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 var(--spacing-md);
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 var(--spacing-lg);
            }
        }

        /* Navbar */
        .navbar {
            background: rgba(15, 12, 32, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: var(--spacing-sm) 0;
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: all 0.3s;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.4rem;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
            line-height: 1.2;
            max-width: 280px;
            white-space: normal;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            margin: 0 var(--spacing-xs);
            padding: 0.5rem 1rem;
            border-radius: var(--border-radius);
            transition: all 0.3s;
        }
        .navbar-nav .nav-link.active,
        .navbar-nav .nav-link:hover {
            color: var(--text-primary) !important;
            background: rgba(0, 240, 255, 0.1);
        }
        .btn-login {
            color: var(--text-primary) !important;
            background: transparent;
            border: 1px solid var(--accent-secondary);
            padding: 0.5rem 1.5rem;
            border-radius: 25px;
            font-weight: 600;
            transition: all 0.3s;
        }
        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            border-color: var(--accent-primary);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: var(--bg-primary) !important;
            padding: 0.5rem 1.8rem;
            border-radius: 25px;
            font-weight: 700;
            border: none;
            box-shadow: 0 4px 15px rgba(0, 240, 255, 0.4);
            transition: all 0.3s;
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 240, 255, 0.6);
        }
        .navbar-toggler {
            border-color: var(--accent-secondary);
            color: var(--accent-secondary);
        }
        .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(0,240,255,0.8)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(15, 12, 32, 0.98);
                padding: var(--spacing-md);
                border-radius: var(--border-radius);
                margin-top: var(--spacing-sm);
            }
            .navbar-nav {
                margin-bottom: var(--spacing-sm);
            }
            .d-flex.auth-btns {
                flex-direction: row;
                gap: 0.5rem;
            }
        }

        /* Hero */
        .hero {
            background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
            padding: var(--spacing-xl) 0;
            position: relative;
            overflow: hidden;
            clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
        }
        .hero h1 {
            font-size: 2.8rem;
            color: var(--text-primary);
            margin-bottom: var(--spacing-md);
            line-height: 1.15;
        }
        .hero .lead {
            font-size: 1.2rem;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-lg);
            max-width: 700px;
        }
        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: var(--spacing-sm);
        }
        .btn-cta-primary {
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            color: var(--bg-primary);
            font-weight: 800;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            border: none;
            font-size: 1.1rem;
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.5);
            transition: all 0.3s;
        }
        .btn-cta-primary:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0, 240, 255, 0.8);
            color: var(--bg-primary);
        }
        .btn-cta-outline {
            background: transparent;
            border: 2px solid var(--accent-secondary);
            color: var(--accent-secondary);
            font-weight: 700;
            padding: 0.8rem 2.2rem;
            border-radius: 50px;
            font-size: 1.1rem;
            transition: all 0.3s;
        }
        .btn-cta-outline:hover {
            background: rgba(0, 240, 255, 0.1);
            border-color: var(--accent-primary);
            color: var(--accent-primary);
        }
        .hero-visual {
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100%;
        }
        .hero-visual img {
            max-width: 400px;
            border-radius: 20px;
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.3);
            border: 1px solid rgba(0, 240, 255, 0.4);
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2rem;
            }
            .hero .lead {
                font-size: 1rem;
            }
            .hero-visual img {
                max-width: 280px;
                margin-top: var(--spacing-lg);
            }
        }

        /* Section Styles */
        section {
            padding: var(--spacing-xl) 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
            position: relative;
            display: inline-block;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: var(--spacing-lg);
        }

        /* Category Entry Matrix */
        .entry-card {
            background: var(--bg-card);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-lg);
            transition: all 0.3s;
            height: 100%;
            display: block;
            color: var(--text-primary);
        }
        .entry-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-glow);
            border-color: var(--accent-secondary);
            color: var(--text-primary);
            text-decoration: none;
        }
        .entry-card h3 {
            font-size: 1.6rem;
            margin-bottom: var(--spacing-sm);
            color: var(--accent-secondary);
        }
        .entry-card p {
            color: var(--text-secondary);
        }

        /* Milestones */
        .milestone-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-md);
            text-align: center;
            transition: all 0.3s;
        }
        .milestone-item:hover {
            box-shadow: var(--shadow-glow);
        }
        .milestone-number {
            font-size: 3rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        /* News List */
        .news-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-md);
            margin-bottom: var(--spacing-md);
            transition: all 0.3s;
        }
        .news-item:hover {
            border-color: var(--accent-secondary);
            box-shadow: var(--shadow-glow);
        }
        .news-item h4 a {
            color: var(--text-primary);
            font-weight: 700;
        }
        .news-item h4 a:hover {
            color: var(--accent-secondary);
        }
        .news-meta {
            color: var(--text-secondary);
            font-size: 0.85rem;
        }

        /* Trust / Security */
        .trust-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: var(--spacing-lg);
            height: 100%;
            text-align: center;
            transition: all 0.3s;
        }
        .trust-card i {
            font-size: 3rem;
            color: var(--accent-secondary);
            margin-bottom: var(--spacing-sm);
        }

        /* App Download CTA */
        .app-section {
            background: linear-gradient(135deg, var(--bg-secondary), var(--bg-primary));
            border-radius: var(--border-radius);
            padding: var(--spacing-xl);
            border: 1px solid var(--border-color);
        }
        .app-btn {
            background: var(--text-primary);
            color: var(--bg-primary);
            font-weight: 700;
            padding: 0.8rem 2rem;
            border-radius: 50px;
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            transition: all 0.3s;
            border: none;
        }
        .app-btn:hover {
            background: var(--accent-primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(204, 255, 0, 0.4);
        }

        /* FAQ */
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            margin-bottom: var(--spacing-sm);
            border-radius: var(--border-radius) !important;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 700;
            box-shadow: none !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-secondary);
        }
        .accordion-body {
            color: var(--text-secondary);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1rem;
            bottom: 6rem;
            z-index: 1040;
            width: 55px;
            height: 55px;
            border-radius: 50%;
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
            transition: all 0.3s;
            font-size: 1.8rem;
            color: var(--accent-secondary);
        }
        .fab-left::before {
            content: "";
            position: absolute;
            top: -2px; left: -2px; right: -2px; bottom: -2px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
            z-index: -1;
        }
        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(0, 240, 255, 0.8);
            color: var(--accent-primary);
        }

        /* Footer */
        footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: var(--spacing-xl) 0 var(--spacing-md);
            color: var(--text-secondary);
        }
        footer a {
            color: var(--text-secondary);
        }
        footer a:hover {
            color: var(--accent-secondary);
        }
        .footer-brand {
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-primary);
        }
        .badge-trust {
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-secondary);
            border: 1px solid var(--accent-secondary);
            border-radius: 20px;
            padding: 0.3rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
        }

/* roulang page: category1 */
:root {
            /* Theme: Royal Dark VIP Lounge + Las Vegas VIP Lounge */
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1C1C1E;
            --bg-hero: #121212;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-bronze: #A77B3C;
            --text-primary: #F5F5F7;
            --text-secondary: #A6ACAF;
            --text-muted: #D4AC0D;
            --border-color: #2C2C2E;
            --border-gold: rgba(197, 160, 89, 0.4);
            --shadow-card: 0 4px 20px rgba(0,0,0,0.6);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.15);
            --radius-lg: 12px;
            --radius-md: 8px;
            --radius-sm: 4px;
            --transition-base: all 0.3s ease;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

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

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }

        a:hover {
            color: var(--accent-amber);
            text-decoration: underline;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 1rem;
            line-height: 1.3;
        }

        h1 {
            font-size: 2.5rem;
        }
        h2 {
            font-size: 2rem;
        }
        h3 {
            font-size: 1.5rem;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* --- Navigation --- */
        .navbar {
            background-color: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            padding: 0.8rem 0;
            box-shadow: 0 2px 10px rgba(0,0,0,0.3);
        }

        .navbar-brand {
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--accent-gold) !important;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }

        .navbar-brand small {
            color: var(--text-secondary);
            font-weight: 400;
        }

        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            padding: 0.5rem 1rem;
            transition: var(--transition-base);
            margin: 0 0.15rem;
            border-radius: var(--radius-sm);
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-gold) !important;
            background-color: rgba(197, 160, 89, 0.1);
        }

        .navbar-nav .nav-link.active {
            border-bottom: 2px solid var(--accent-gold);
        }

        .navbar-toggler {
            border-color: var(--border-gold);
        }

        .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(197, 160, 89, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 0.5rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 600;
            transition: var(--transition-base);
        }

        .btn-login:hover {
            background-color: rgba(197, 160, 89, 0.15);
            color: var(--accent-amber);
            border-color: var(--accent-amber);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-bronze), var(--accent-gold));
            border: none;
            color: #121212;
            padding: 0.5rem 1.5rem;
            border-radius: var(--radius-md);
            font-weight: 700;
            transition: var(--transition-base);
            box-shadow: 0 2px 8px rgba(197,160,89,0.3);
        }

        .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            box-shadow: 0 4px 15px rgba(255,191,0,0.4);
            color: #121212;
            transform: translateY(-1px);
        }

        .auth-btns {
            align-items: center;
        }

        /* --- Hero --- */
        .hero-category {
            background: linear-gradient(180deg, #1C1C1E 0%, #121212 100%);
            padding: 4rem 0 3rem;
            border-bottom: 1px solid var(--border-color);
            text-align: left;
        }

        .hero-category h1 {
            color: var(--accent-gold);
            font-size: 2.8rem;
            margin-bottom: 1rem;
            font-weight: 800;
        }

        .hero-category .lead {
            color: var(--text-secondary);
            font-size: 1.2rem;
            max-width: 750px;
            margin-bottom: 2rem;
            line-height: 1.7;
        }

        .hero-category .hero-badge {
            display: inline-block;
            background: rgba(197,160,89,0.15);
            color: var(--accent-gold);
            padding: 0.35rem 1.2rem;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.9rem;
            margin-bottom: 1.5rem;
            border: 1px solid var(--border-gold);
        }

        /* --- Buttons & Components --- */
        .btn-gold {
            background: linear-gradient(135deg, var(--accent-bronze), var(--accent-gold));
            border: none;
            color: #121212;
            font-weight: 700;
            padding: 0.75rem 2rem;
            border-radius: var(--radius-md);
            transition: var(--transition-base);
            box-shadow: 0 4px 12px rgba(197,160,89,0.25);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            font-size: 0.95rem;
        }

        .btn-gold:hover {
            background: linear-gradient(135deg, var(--accent-gold), var(--accent-amber));
            box-shadow: 0 6px 20px rgba(255,191,0,0.35);
            transform: translateY(-2px);
            color: #121212;
        }

        .btn-outline-gold {
            background: transparent;
            border: 1.5px solid var(--accent-gold);
            color: var(--accent-gold);
            font-weight: 600;
            padding: 0.7rem 1.8rem;
            border-radius: var(--radius-md);
            transition: var(--transition-base);
        }

        .btn-outline-gold:hover {
            background: rgba(197,160,89,0.2);
            border-color: var(--accent-amber);
            color: var(--accent-amber);
        }

        /* --- Cards --- */
        .card-strategy {
            background-color: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            transition: var(--transition-base);
            height: 100%;
            box-shadow: var(--shadow-card);
        }

        .card-strategy:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
            transform: translateY(-5px);
        }

        .card-strategy .card-icon {
            font-size: 2.8rem;
            color: var(--accent-gold);
            margin-bottom: 1.2rem;
        }

        .card-strategy h3 {
            font-size: 1.4rem;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }

        .card-strategy p {
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 0;
        }

        .card-number {
            font-size: 3.5rem;
            font-weight: 800;
            color: rgba(197,160,89,0.15);
            position: absolute;
            top: 10px;
            right: 20px;
            line-height: 1;
        }

        /* --- Sections --- */
        .section-padding {
            padding: 4.5rem 0;
        }

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

        .section-title-h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.8rem;
        }

        .section-subtitle {
            color: var(--text-secondary);
            font-size: 1.1rem;
            max-width: 700px;
            margin-bottom: 3rem;
            line-height: 1.6;
        }

        .gold-line {
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-gold), var(--accent-amber));
            margin: 0.8rem 0 1.5rem;
            border-radius: 2px;
        }

        /* --- Lists & Tabs --- */
        .check-list {
            list-style: none;
            padding-left: 0;
        }

        .check-list li {
            padding-left: 1.8rem;
            position: relative;
            margin-bottom: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .check-list li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-size: 0.9rem;
        }

        .step-block {
            background: var(--bg-card);
            border-left: 4px solid var(--accent-gold);
            padding: 1.5rem;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin-bottom: 1.5rem;
            box-shadow: var(--shadow-card);
        }

        .step-block .step-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1;
        }

        /* --- FAQ --- */
        .faq-section .accordion-button {
            background-color: var(--bg-card);
            color: var(--text-primary);
            font-weight: 600;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            padding: 1.2rem 1.5rem;
        }

        .faq-section .accordion-button:not(.collapsed) {
            background-color: rgba(197,160,89,0.1);
            color: var(--accent-gold);
            border-color: var(--border-gold);
            box-shadow: none;
        }

        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 2px var(--border-gold);
            border-color: var(--accent-gold);
        }

        .faq-section .accordion-body {
            background-color: var(--bg-secondary);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 1.5rem;
            line-height: 1.7;
        }

        /* --- CTA --- */
        .cta-strip {
            background: linear-gradient(135deg, #1C1C1E 0%, #2C2C2E 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 2.5rem 2rem;
            box-shadow: var(--shadow-gold);
        }

        /* --- Footer --- */
        footer {
            background-color: #0A0A0A;
            border-top: 2px solid var(--border-gold);
            padding: 3rem 0 1.5rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        footer h5 {
            color: var(--accent-gold);
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1.1rem;
        }

        footer .footer-brand {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-gold);
        }

        footer a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: var(--transition-base);
        }

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

        footer .badge-trust {
            background: rgba(197,160,89,0.15);
            color: var(--accent-gold);
            padding: 0.4rem 1rem;
            border-radius: 20px;
            font-size: 0.85rem;
            display: inline-block;
            border: 1px solid var(--border-gold);
        }

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

        /* --- FAB --- */
        .fab-gold {
            position: fixed;
            left: 1.5rem;
            bottom: 3rem;
            z-index: 1050;
            width: 58px;
            height: 58px;
            background: radial-gradient(circle at 30% 30%, #C5A059, #7A5C2E);
            border: 2px solid #FFD700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #121212;
            font-size: 1.6rem;
            box-shadow: 0 4px 20px rgba(255,215,0,0.25);
            cursor: pointer;
            transition: var(--transition-base);
            opacity: 0.85;
            animation: floatGolden 3s infinite ease-in-out;
        }

        .fab-gold:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 6px 25px rgba(255,215,0,0.45);
        }

        @keyframes floatGolden {
            0% { transform: translateY(0px); }
            50% { transform: translateY(-5px); }
            100% { transform: translateY(0px); }
        }

        .fab-notification {
            position: absolute;
            top: 2px;
            right: 2px;
            width: 12px;
            height: 12px;
            background: #D32F2F;
            border-radius: 50%;
            border: 2px solid #121212;
            animation: blinkRed 1.8s infinite;
        }

        @keyframes blinkRed {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* --- Responsive --- */
        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .hero-category { padding: 3rem 0 2rem; }
            .section-padding { padding: 3rem 0; }
        }

        @media (max-width: 768px) {
            .navbar-brand { font-size: 1.2rem; }
            h1 { font-size: 1.9rem; }
            .hero-category .lead { font-size: 1rem; }
            .card-strategy { padding: 1.5rem; }
            .fab-gold { width: 50px; height: 50px; left: 1rem; bottom: 2rem; }
            .cta-strip { padding: 2rem 1.5rem; }
        }

        @media (max-width: 520px) {
            .hero-category { padding: 2rem 0 1.5rem; }
            .section-padding { padding: 2rem 0; }
            .btn-gold, .btn-outline-gold { display: block; width: 100%; text-align: center; margin-bottom: 0.5rem; }
            .auth-btns { margin-top: 0.5rem; }
        }

        .relative { position: relative; }
        .overflow-hidden { overflow: hidden; }

/* roulang page: article */
:root {
            --primary-bg: #0A2E1C;
            --secondary-bg: #123E25;
            --card-bg: #0F3520;
            --accent-gold: #FFD700;
            --accent-red: #D32F2F;
            --text-white: #FFFFFF;
            --text-mint: #D1F2EB;
            --text-muted: #A0C5B5;
            --border-color: rgba(255, 215, 0, 0.2);
            --border-gold: #FFD700;
            --shadow-gold: 0 4px 20px rgba(255, 215, 0, 0.15);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-family: 'Inter', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

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

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

        a:hover {
            color: #FFE44D;
            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-white);
        }

        h1 {
            font-size: 2.75rem;
            letter-spacing: -0.02em;
        }

        h2 {
            font-size: 2rem;
            letter-spacing: -0.01em;
        }

        h3 {
            font-size: 1.5rem;
        }

        p {
            color: var(--text-mint);
            line-height: 1.7;
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navbar */
        .navbar {
            background: rgba(18, 62, 37, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            padding: 12px 0;
            transition: all var(--transition);
            position: sticky;
            top: 0;
            z-index: 1050;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.4rem;
            color: var(--accent-gold) !important;
            letter-spacing: -0.01em;
            line-height: 1.2;
        }

        .navbar-brand small {
            font-weight: 500;
            color: var(--text-mint);
            display: block;
        }

        .navbar-nav .nav-link {
            color: var(--text-mint) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            transition: color var(--transition);
            border-radius: 6px;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(255, 215, 0, 0.08);
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            color: var(--text-mint);
        }

        .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(209, 242, 235, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--border-gold);
            color: var(--accent-gold) !important;
            font-weight: 600;
            padding: 8px 20px;
            border-radius: 24px;
            transition: all var(--transition);
            font-size: 0.9rem;
        }

        .btn-login:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: #FFE44D;
            color: #FFE44D !important;
        }

        .btn-signup {
            background: linear-gradient(135deg, #FFD700 0%, #FFB800 100%);
            color: #0A2E1C !important;
            font-weight: 700;
            padding: 8px 24px;
            border-radius: 24px;
            border: none;
            transition: all var(--transition);
            font-size: 0.9rem;
            box-shadow: 0 4px 16px rgba(255, 215, 0, 0.3);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 215, 0, 0.45);
            background: linear-gradient(135deg, #FFE44D 0%, #FFC800 100%);
        }

        .auth-btns {
            gap: 0;
        }

        /* Article Hero */
        .article-hero {
            position: relative;
            background: linear-gradient(180deg, #0A2E1C 0%, #123E25 100%);
            padding: 60px 0 40px;
            overflow: hidden;
        }

        .article-hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.25;
            z-index: 1;
        }

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

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 16px;
        }

        .article-meta .badge-category {
            background: rgba(255, 215, 0, 0.15);
            color: var(--accent-gold);
            padding: 6px 14px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.85rem;
            border: 1px solid rgba(255, 215, 0, 0.3);
        }

        .article-meta .meta-date {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .article-meta .meta-date i {
            color: var(--accent-gold);
        }

        /* Article Content */
        .article-content-wrapper {
            padding: 40px 0 60px;
            background: linear-gradient(180deg, #123E25 0%, #0A2E1C 100%);
        }

        .article-body {
            max-width: 800px;
            margin: 0 auto;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 48px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-card);
        }

        .article-body h2 {
            font-size: 1.8rem;
            margin-top: 40px;
            margin-bottom: 16px;
            color: var(--accent-gold);
        }

        .article-body h3 {
            font-size: 1.4rem;
            margin-top: 32px;
            margin-bottom: 12px;
            color: var(--text-white);
        }

        .article-body p {
            margin-bottom: 18px;
            font-size: 1.05rem;
            color: var(--text-mint);
        }

        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
            color: var(--text-mint);
        }

        .article-body li {
            margin-bottom: 10px;
            font-size: 1.02rem;
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 24px 0;
            box-shadow: var(--shadow-gold);
        }

        .article-body blockquote {
            background: rgba(255, 215, 0, 0.05);
            border-left: 4px solid var(--accent-gold);
            padding: 24px 28px;
            margin: 32px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-mint);
            font-size: 1.1rem;
        }

        .article-body blockquote::before {
            content: '\201C';
            font-size: 3rem;
            color: var(--accent-gold);
            display: block;
            line-height: 1;
            margin-bottom: 8px;
        }

        /* Pull Quote */
        .pull-quote {
            background: linear-gradient(135deg, rgba(255, 215, 0, 0.1) 0%, rgba(211, 47, 47, 0.08) 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px 32px;
            margin: 32px 0;
            text-align: center;
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--accent-gold);
            position: relative;
        }

        .pull-quote::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: url('/assets/images/coverpic/cover-3.png') center/cover no-repeat;
            opacity: 0.06;
            border-radius: var(--radius-md);
            z-index: 0;
        }

        .pull-quote span {
            position: relative;
            z-index: 1;
        }

        /* Invite CTA Section */
        .invite-section {
            background: linear-gradient(135deg, #0F3520 0%, #123E25 50%, #0A2E1C 100%);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin: 40px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .invite-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.05) 0%, transparent 70%);
            z-index: 1;
        }

        .invite-section > * {
            position: relative;
            z-index: 2;
        }

        .invite-section h3 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

        .invite-section .reward-text {
            color: var(--accent-gold);
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .invite-section .progress {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 4px;
            margin: 20px 0;
            overflow: hidden;
        }

        .invite-section .progress-bar {
            background: linear-gradient(90deg, #FFD700 0%, #FFB800 100%);
            border-radius: 4px;
            transition: width 0.8s ease;
        }

        .btn-invite {
            background: linear-gradient(135deg, #FFD700 0%, #FF8C00 100%);
            color: #0A2E1C;
            font-weight: 700;
            padding: 14px 36px;
            border-radius: 32px;
            border: none;
            font-size: 1.1rem;
            transition: all var(--transition);
            box-shadow: 0 6px 24px rgba(255, 140, 0, 0.35);
            display: inline-block;
            margin-top: 12px;
        }

        .btn-invite:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 32px rgba(255, 140, 0, 0.5);
            color: #0A2E1C;
        }

        /* Share Section */
        .share-section {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
            margin: 32px 0;
            padding: 20px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .share-section span {
            font-weight: 600;
            color: var(--text-mint);
            margin-right: 8px;
        }

        .share-btn {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-mint);
            transition: all var(--transition);
            border: 1px solid var(--border-color);
            font-size: 1rem;
        }

        .share-btn:hover {
            background: var(--accent-gold);
            color: #0A2E1C;
            border-color: var(--accent-gold);
        }

        /* Not Found */
        .not-found {
            text-align: center;
            padding: 80px 20px;
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
        }

        .not-found h3 {
            font-size: 2rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }

        .not-found p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .btn-back {
            background: var(--accent-gold);
            color: #0A2E1C;
            font-weight: 700;
            padding: 12px 28px;
            border-radius: 24px;
            display: inline-block;
            transition: all var(--transition);
            border: none;
        }

        .btn-back:hover {
            background: #FFE44D;
            color: #0A2E1C;
            transform: translateY(-2px);
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1000;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #1A1A1A 0%, #0A0A0A 100%);
            border: 2px solid #FFD700;
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition);
            opacity: 0.75;
            animation: float 3s ease-in-out infinite;
        }

        .fab-left i {
            color: #FFD700;
            font-size: 1.5rem;
            transition: transform var(--transition);
        }

        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 32px rgba(255, 215, 0, 0.5);
        }

        .fab-left:hover i {
            transform: rotate(360deg);
        }

        .fab-left .notification-dot {
            position: absolute;
            top: 6px;
            right: 6px;
            width: 12px;
            height: 12px;
            background: #D32F2F;
            border-radius: 50%;
            border: 2px solid #0A0A0A;
            animation: blink 1.5s infinite;
        }

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

        @keyframes blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        /* Footer */
        footer {
            background: #062315;
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            color: var(--text-mint);
        }

        footer .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-gold);
            margin-bottom: 8px;
        }

        footer h5 {
            font-size: 1rem;
            color: var(--accent-gold);
            margin-bottom: 16px;
            font-weight: 700;
        }

        footer ul li {
            margin-bottom: 8px;
        }

        footer ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition);
        }

        footer ul li a:hover {
            color: var(--accent-gold);
        }

        footer .badge-trust {
            background: rgba(255, 215, 0, 0.1);
            border: 1px solid var(--border-color);
            color: var(--accent-gold);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 0.85rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            margin-top: 12px;
        }

        footer hr {
            margin: 30px 0;
            opacity: 0.3;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            h1 {
                font-size: 2.2rem;
            }
            h2 {
                font-size: 1.7rem;
            }
            .article-body {
                padding: 32px 24px;
            }
            .invite-section {
                padding: 28px 20px;
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 1.8rem;
            }
            h2 {
                font-size: 1.5rem;
            }
            .article-hero {
                padding: 40px 0 30px;
            }
            .article-body {
                padding: 24px 20px;
                border-radius: var(--radius-md);
            }
            .article-body h2 {
                font-size: 1.5rem;
            }
            .pull-quote {
                padding: 20px;
                font-size: 1rem;
            }
            .invite-section {
                padding: 24px 16px;
            }
            .invite-section .reward-text {
                font-size: 1.5rem;
            }
            .share-section {
                justify-content: center;
            }
            .fab-left {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
            }
            .navbar .auth-btns {
                flex-direction: row !important;
                margin-top: 12px;
            }
        }

        @media (max-width: 520px) {
            h1 {
                font-size: 1.6rem;
            }
            .article-body {
                padding: 20px 16px;
            }
            .article-body blockquote {
                padding: 16px;
                font-size: 0.95rem;
            }
            .invite-section h3 {
                font-size: 1.4rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #1A1A1A;
            --bg-secondary: #121212;
            --bg-card: #1E1E1E;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --accent-bronze: #CD7F32;
            --text-primary: #F5F5F7;
            --text-secondary: #D4AC0D;
            --text-muted: #A8A8A8;
            --border-color: #2A2A2A;
            --border-gold: rgba(197, 160, 89, 0.3);
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.3);
            --shadow-gold: 0 8px 32px rgba(197, 160, 89, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 20px;
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', '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;
        }

        html {
            scroll-behavior: smooth;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            min-height: 100vh;
            letter-spacing: 0.01em;
        }

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

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

        button,
        .btn {
            font-family: var(--font-body);
            cursor: pointer;
            transition: all var(--transition-smooth);
            outline: none;
        }

        .btn:focus-visible,
        a:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 3px;
            border-radius: var(--radius-sm);
        }

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

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* ---------- HEADER / NAV ---------- */
        header {
            background: rgba(18, 18, 18, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-gold);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: background var(--transition-smooth);
        }

        .navbar {
            padding: 0.6rem 0;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--accent-gold) !important;
            letter-spacing: 0.03em;
            line-height: 1.3;
            transition: color var(--transition-fast);
        }

        .navbar-brand:hover {
            color: var(--accent-amber) !important;
        }

        .navbar-brand small {
            font-weight: 500;
            font-size: 0.7rem;
            color: var(--text-muted);
            display: block;
            letter-spacing: 0.02em;
        }

        .navbar-nav .nav-link {
            color: var(--text-muted) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 0.5rem 1rem;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            position: relative;
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(197, 160, 89, 0.08);
        }

        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 0;
            transition: width var(--transition-smooth);
        }

        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            width: 60%;
        }

        .navbar-toggler {
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-sm);
            padding: 0.4rem 0.75rem;
            background: transparent;
        }

        .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(197, 160, 89, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(197, 160, 89, 0.25);
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            font-weight: 600;
            padding: 0.5rem 1.4rem;
            border-radius: 50px;
            font-size: 0.9rem;
            letter-spacing: 0.03em;
            transition: all var(--transition-smooth);
        }

        .btn-login:hover {
            background: rgba(197, 160, 89, 0.1);
            color: var(--accent-amber);
            border-color: var(--accent-amber);
            box-shadow: 0 4px 15px rgba(197, 160, 89, 0.2);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #121212;
            font-weight: 700;
            padding: 0.5rem 1.6rem;
            border-radius: 50px;
            font-size: 0.9rem;
            border: none;
            letter-spacing: 0.03em;
            box-shadow: 0 4px 18px rgba(255, 191, 0, 0.35);
            transition: all var(--transition-smooth);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(255, 191, 0, 0.5);
            color: #121212;
        }

        .auth-btns {
            gap: 0.5rem;
        }

        @media (max-width: 991.98px) {
            .navbar-collapse {
                background: rgba(18, 18, 18, 0.98);
                border-radius: var(--radius-md);
                padding: 1rem;
                margin-top: 0.5rem;
                border: 1px solid var(--border-color);
            }
            .auth-btns {
                flex-direction: row;
                width: 100%;
                margin-left: 0 !important;
                margin-top: 0.75rem;
                justify-content: center;
                gap: 0.75rem;
            }
            .btn-login,
            .btn-signup {
                flex: 1;
                text-align: center;
            }
        }

        /* ---------- MAIN CONTENT ---------- */
        main {
            min-height: 60vh;
        }

        /* ---------- HERO BANNER ---------- */
        .hero-category {
            background: linear-gradient(135deg, rgba(26, 26, 26, 0.95) 0%, rgba(18, 18, 18, 0.98) 100%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            background-blend-mode: overlay;
            padding: 4rem 0 3.5rem;
            border-bottom: 1px solid var(--border-gold);
            position: relative;
            overflow: hidden;
        }

        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 30% 20%, rgba(197, 160, 89, 0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .hero-category h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--accent-gold);
            letter-spacing: 0.02em;
            position: relative;
            z-index: 1;
        }

        .hero-category .lead {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 700px;
            position: relative;
            z-index: 1;
            font-weight: 400;
            line-height: 1.7;
        }

        .hero-category .badge-tag {
            display: inline-block;
            background: rgba(197, 160, 89, 0.15);
            color: var(--accent-amber);
            border: 1px solid var(--border-gold);
            border-radius: 50px;
            padding: 0.3rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            margin-bottom: 1rem;
        }

        @media (max-width: 768px) {
            .hero-category {
                padding: 2.5rem 0 2rem;
            }
            .hero-category h1 {
                font-size: 1.9rem;
            }
            .hero-category .lead {
                font-size: 1rem;
            }
        }

        /* ---------- SECTIONS ---------- */
        section {
            padding: 4rem 0;
        }

        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 0.75rem;
            letter-spacing: 0.02em;
        }

        .section-subtitle {
            color: var(--text-muted);
            font-size: 1.05rem;
            margin-bottom: 2.5rem;
            max-width: 650px;
        }

        .highlight-gold {
            color: var(--accent-gold);
            font-weight: 600;
        }

        /* ---------- CARDS ---------- */
        .card-tech {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            transition: all var(--transition-smooth);
            height: 100%;
            position: relative;
            overflow: hidden;
        }

        .card-tech:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
            transform: translateY(-4px);
        }

        .card-tech .icon-wrap {
            width: 52px;
            height: 52px;
            background: rgba(197, 160, 89, 0.1);
            border-radius: var(--radius-md);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.2rem;
            font-size: 1.5rem;
            color: var(--accent-gold);
            transition: all var(--transition-smooth);
        }

        .card-tech:hover .icon-wrap {
            background: rgba(197, 160, 89, 0.2);
            box-shadow: 0 0 20px rgba(197, 160, 89, 0.2);
        }

        .card-tech h3 {
            font-size: 1.25rem;
            font-weight: 700;
            margin-bottom: 0.7rem;
            color: var(--text-primary);
        }

        .card-tech p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin: 0;
            line-height: 1.7;
        }

        /* ---------- CONTENT BLOCK ---------- */
        .block-content {
            background: var(--bg-primary);
            border-radius: var(--radius-lg);
            padding: 2.5rem;
            border-left: 4px solid var(--accent-gold);
            box-shadow: var(--shadow-card);
            margin-bottom: 2rem;
        }

        .block-content h3 {
            font-size: 1.4rem;
            color: var(--accent-amber);
            margin-bottom: 1rem;
        }

        .block-content p,
        .block-content ul {
            color: var(--text-muted);
            font-size: 1rem;
            line-height: 1.75;
        }

        .block-content ul {
            padding-left: 1.5rem;
            list-style-type: none;
        }

        .block-content ul li {
            position: relative;
            padding-left: 1.5rem;
            margin-bottom: 0.5rem;
        }

        .block-content ul li::before {
            content: '◆';
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-size: 0.7rem;
            top: 0.3rem;
        }

        /* ---------- IMAGE BLOCK ---------- */
        .img-showcase {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-color);
            transition: all var(--transition-smooth);
        }

        .img-showcase img {
            transition: transform 0.4s ease;
        }

        .img-showcase:hover img {
            transform: scale(1.03);
        }

        /* ---------- STATS ---------- */
        .stat-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.2rem;
            text-align: left;
            transition: all var(--transition-smooth);
        }

        .stat-item:hover {
            border-color: var(--border-gold);
        }

        .stat-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-gold);
            line-height: 1;
            margin-bottom: 0.4rem;
        }

        .stat-label {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* ---------- FAQ ---------- */
        .faq-item {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 1.5rem 1.8rem;
            margin-bottom: 1rem;
            transition: all var(--transition-smooth);
            cursor: default;
        }

        .faq-item:hover {
            border-color: var(--border-gold);
            background: var(--bg-card);
        }

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

        .faq-item p {
            color: var(--text-muted);
            margin: 0;
            font-size: 0.95rem;
            line-height: 1.7;
        }

        /* ---------- CTA ---------- */
        .cta-strip {
            background: linear-gradient(135deg, rgba(197, 160, 89, 0.08) 0%, rgba(18, 18, 18, 0.95) 100%);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: center;
        }

        .btn-cta-gold {
            background: linear-gradient(135deg, var(--accent-gold) 0%, var(--accent-amber) 100%);
            color: #121212;
            font-weight: 700;
            padding: 0.9rem 2.8rem;
            border-radius: 50px;
            font-size: 1.05rem;
            border: none;
            letter-spacing: 0.03em;
            box-shadow: 0 6px 25px rgba(255, 191, 0, 0.4);
            transition: all var(--transition-smooth);
        }

        .btn-cta-gold:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(255, 191, 0, 0.6);
            color: #121212;
        }

        /* ---------- FAB ---------- */
        .fab-left {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.4rem;
            box-shadow: 0 4px 20px rgba(197, 160, 89, 0.3);
            transition: all var(--transition-smooth);
            animation: floatFab 3s ease-in-out infinite;
            cursor: pointer;
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 6px 30px rgba(197, 160, 89, 0.55);
            background: var(--accent-gold);
            color: #121212;
        }

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

        /* ---------- FOOTER ---------- */
        footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-gold);
            padding: 3rem 0 1.5rem;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-gold);
            letter-spacing: 0.02em;
        }

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

        footer ul li a {
            color: var(--text-muted);
            transition: color var(--transition-fast);
            line-height: 2;
        }

        footer ul li a:hover {
            color: var(--accent-gold);
        }

        .badge-trust {
            display: inline-block;
            background: rgba(197, 160, 89, 0.1);
            color: var(--accent-gold);
            border: 1px solid var(--border-gold);
            border-radius: 50px;
            padding: 0.35rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            margin-top: 0.5rem;
        }

        footer hr {
            opacity: 0.25;
        }

        /* ---------- RESPONSIVE ---------- */
        @media (max-width: 1024px) {
            .section-title {
                font-size: 1.6rem;
            }
            .card-tech {
                padding: 1.5rem;
            }
            .block-content {
                padding: 2rem;
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 2.5rem 0;
            }
            .hero-category {
                padding: 2rem 0 1.5rem;
            }
            .hero-category h1 {
                font-size: 1.6rem;
            }
            .stat-number {
                font-size: 1.7rem;
            }
            .card-tech h3 {
                font-size: 1.1rem;
            }
            .cta-strip {
                padding: 2rem 1.5rem;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1rem;
            }
            .hero-category h1 {
                font-size: 1.4rem;
            }
            .btn-login,
            .btn-signup {
                padding: 0.4rem 1rem;
                font-size: 0.8rem;
            }
            .card-tech {
                padding: 1.2rem;
            }
            .block-content {
                padding: 1.5rem;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-tertiary: #252527;
            --accent-gold: #C5A059;
            --accent-amber: #FFBF00;
            --text-primary: #F5F5F7;
            --text-secondary: #A6A0A0;
            --text-muted: #7A7373;
            --border-color: #3A3A3D;
            --border-radius: 16px;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.4);
            --shadow-md: 0 6px 24px rgba(0, 0, 0, 0.6);
            --shadow-gold: 0 4px 20px rgba(197, 160, 89, 0.15);
            --transition: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            --font-heading: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --font-body: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

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

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

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

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

        button, .btn {
            font-family: var(--font-body);
            cursor: pointer;
            transition: all var(--transition);
        }

        .container {
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Header & Navigation */
        header {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 1050;
            backdrop-filter: blur(20px);
        }
        .navbar {
            padding: 0.85rem 0;
        }
        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--accent-gold) !important;
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .navbar-brand small {
            font-weight: 400;
            color: var(--text-secondary);
            display: block;
        }
        .navbar-brand:hover {
            color: var(--accent-amber) !important;
        }
        .navbar-nav .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            padding: 0.5rem 1rem !important;
            border-radius: 6px;
            margin: 0 0.15rem;
            transition: all var(--transition);
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(197, 160, 89, 0.08);
        }
        .navbar-toggler {
            border-color: var(--border-color);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 30 30' xmlns='http://www.w3.org/2000/svg'%3e%3cpath stroke='rgba(197, 160, 89, 0.8)' stroke-width='2' stroke-linecap='round' stroke-miterlimit='10' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }
        .auth-btns .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            font-weight: 600;
            border-radius: 8px;
            padding: 0.45rem 1.5rem;
            font-size: 0.9rem;
        }
        .auth-btns .btn-login:hover {
            background: rgba(197, 160, 89, 0.12);
            border-color: var(--accent-amber);
            color: var(--accent-amber);
        }
        .auth-btns .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold) 0%, #B8933A 100%);
            border: 1px solid var(--accent-gold);
            color: #1A1A1A;
            font-weight: 700;
            border-radius: 8px;
            padding: 0.45rem 1.8rem;
            font-size: 0.9rem;
            box-shadow: 0 2px 10px rgba(197, 160, 89, 0.25);
        }
        .auth-btns .btn-signup:hover {
            background: linear-gradient(135deg, var(--accent-amber) 0%, #C5A059 100%);
            box-shadow: 0 4px 18px rgba(255, 191, 0, 0.4);
            color: #0D0D0D;
            transform: translateY(-1px);
        }

        /* Hero - Category Page */
        .hero-category {
            background: linear-gradient(180deg, #1C1C1E 0%, #121212 100%);
            padding: 3.5rem 0 3rem;
            border-bottom: 1px solid rgba(197, 160, 89, 0.2);
            position: relative;
            overflow: hidden;
        }
        .hero-category::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 30% 20%, rgba(197, 160, 89, 0.06) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-cate-content h1 {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 2.6rem;
            color: var(--text-primary);
            margin-bottom: 1rem;
            letter-spacing: -0.5px;
        }
        .hero-cate-content .highlight {
            color: var(--accent-gold);
        }
        .hero-cate-content p {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 650px;
            margin-bottom: 1.8rem;
        }
        .badge-hot {
            background: linear-gradient(135deg, #C5A059, #FFBF00);
            color: #121212;
            font-weight: 700;
            padding: 0.4rem 1.3rem;
            border-radius: 30px;
            font-size: 0.9rem;
            display: inline-block;
            letter-spacing: 0.3px;
            box-shadow: 0 2px 12px rgba(197, 160, 89, 0.3);
        }
        .hero-cate-visual {
            display: flex;
            justify-content: center;
            align-items: center;
        }
        .hero-cate-visual img {
            max-width: 100%;
            border-radius: 24px;
            box-shadow: var(--shadow-md);
            border: 2px solid rgba(197, 160, 89, 0.25);
        }

        /* Section Common */
        section {
            padding: 4rem 0;
        }
        .section-label {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            color: var(--accent-gold);
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 1rem;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }
        .section-desc {
            color: var(--text-secondary);
            font-size: 1.05rem;
            max-width: 700px;
            margin-bottom: 2.5rem;
        }

        /* Technique Cards */
        .tech-card {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--border-radius);
            padding: 2rem 1.8rem;
            height: 100%;
            transition: all var(--transition);
            position: relative;
            overflow: hidden;
        }
        .tech-card:hover {
            border-color: var(--accent-gold);
            box-shadow: var(--shadow-gold);
            transform: translateY(-4px);
        }
        .tech-card .tech-number {
            font-size: 3.2rem;
            font-weight: 900;
            color: rgba(197, 160, 89, 0.15);
            position: absolute;
            top: 10px;
            right: 20px;
            line-height: 1;
            pointer-events: none;
        }
        .tech-card h3 {
            font-weight: 700;
            font-size: 1.4rem;
            margin-bottom: 0.85rem;
            color: var(--text-primary);
        }
        .tech-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }
        .tech-card .tech-icon {
            font-size: 2.2rem;
            color: var(--accent-gold);
            margin-bottom: 1.2rem;
            display: inline-block;
        }

        /* Scenario / Step Flow */
        .step-flow {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .step-item {
            flex: 1 1 250px;
            background: var(--bg-secondary);
            border-left: 4px solid var(--accent-gold);
            padding: 1.5rem;
            border-radius: 0 12px 12px 0;
            transition: var(--transition);
        }
        .step-item:hover {
            background: var(--bg-tertiary);
            box-shadow: 0 4px 16px rgba(0,0,0,0.5);
        }
        .step-item h4 {
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 0.5rem;
        }
        .step-item p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            margin: 0;
        }

        /* CTA Bar */
        .cta-bar {
            background: linear-gradient(135deg, #1C1C1E 0%, #252527 100%);
            border: 1px solid rgba(197, 160, 89, 0.3);
            border-radius: var(--border-radius);
            padding: 2.5rem 2rem;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 1.5rem;
        }
        .cta-bar h3 {
            font-weight: 700;
            font-size: 1.5rem;
            margin-bottom: 0.3rem;
        }
        .btn-cta-gold {
            background: linear-gradient(135deg, #C5A059, #FFBF00);
            color: #121212;
            font-weight: 700;
            border: none;
            border-radius: 50px;
            padding: 0.7rem 2.2rem;
            font-size: 1rem;
            letter-spacing: 0.5px;
            box-shadow: 0 4px 18px rgba(197, 160, 89, 0.35);
            white-space: nowrap;
        }
        .btn-cta-gold:hover {
            background: #FFBF00;
            box-shadow: 0 6px 22px rgba(255, 191, 0, 0.5);
            transform: translateY(-2px);
            color: #000;
        }

        /* FAQ */
        .accordion-button:not(.collapsed) {
            background-color: var(--bg-tertiary);
            color: var(--accent-gold);
            box-shadow: none;
            border-color: var(--border-color);
        }
        .accordion-button {
            background-color: var(--bg-secondary);
            color: var(--text-primary);
            font-weight: 600;
            border: 1px solid var(--border-color);
            border-radius: 10px !important;
        }
        .accordion-item {
            background: transparent;
            border: none;
            margin-bottom: 0.8rem;
        }
        .accordion-body {
            background: var(--bg-secondary);
            color: var(--text-secondary);
            border: 1px solid var(--border-color);
            border-top: none;
            border-radius: 0 0 10px 10px;
        }

        /* Footer */
        footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 3.5rem 0 2rem;
            color: var(--text-secondary);
            font-size: 0.95rem;
        }
        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            color: var(--accent-gold);
            font-size: 1.2rem;
        }
        footer h5 {
            color: var(--text-primary);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 1rem;
        }
        footer ul li {
            margin-bottom: 0.5rem;
        }
        footer ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        footer ul li a:hover {
            color: var(--accent-gold);
        }
        .badge-trust {
            background: rgba(197, 160, 89, 0.12);
            color: var(--accent-gold);
            padding: 0.4rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-block;
            margin-top: 0.5rem;
        }

        .bg-alt {
            background: var(--bg-secondary);
        }

        @media (max-width: 768px) {
            .hero-cate-content h1 {
                font-size: 1.9rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .auth-btns {
                margin-top: 0.8rem;
            }
        }