/* roulang page: index */
:root {
            --primary-bg: #0B3C25;
            --secondary-bg: #062315;
            --accent-gold: #FFCC00;
            --accent-lime: #32CD32;
            --text-white: #FFFDF0;
            --text-light-green: #C5E2D2;
            --text-muted: #A0C4B0;
            --border-color: rgba(255, 204, 0, 0.3);
            --card-bg: rgba(11, 60, 37, 0.8);
            --card-hover-bg: #0A4A30;
            --btn-primary-bg: #FFCC00;
            --btn-primary-text: #062315;
            --btn-secondary-bg: transparent;
            --btn-secondary-border: #FFCC00;
            --btn-secondary-text: #FFCC00;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.15);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.25);
            --shadow-lg: 0 8px 32px rgba(0,0,0,0.4);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition-base: all 0.3s ease;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 50%, #0A5C38 100%);
            color: var(--text-white);
            line-height: 1.6;
            overflow-x: hidden;
            min-height: 100vh;
        }

        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: #FFD633;
            text-decoration: underline;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn {
            cursor: pointer;
            transition: var(--transition-base);
        }

        /* Container */
        .container-custom {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1050;
            background: rgba(6, 35, 21, 0.95);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
        }
        .navbar {
            padding: 12px 0;
        }
        .navbar-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-gold) !important;
            letter-spacing: -0.5px;
            white-space: normal;
        }
        .navbar-brand span {
            color: var(--text-light-green);
        }
        .nav-link {
            color: var(--text-white) !important;
            font-weight: 500;
            margin: 0 8px;
            position: relative;
            transition: var(--transition-base);
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-gold) !important;
        }
        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 1px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            border-radius: 20px;
            padding: 8px 20px;
            font-weight: 600;
        }
        .btn-login:hover {
            background: rgba(255,204,0,0.1);
            color: var(--accent-gold);
        }
        .btn-signup {
            background: var(--btn-primary-bg);
            border: none;
            color: var(--btn-primary-text);
            border-radius: 20px;
            padding: 8px 20px;
            font-weight: 700;
        }
        .btn-signup:hover {
            background: #FFD633;
            transform: translateY(-1px);
            box-shadow: 0 4px 12px rgba(255,204,0,0.4);
        }
        .navbar-toggler {
            border-color: var(--accent-gold);
            color: var(--accent-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(255, 204, 0, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero Section */
        .hero-section {
            padding-top: 120px;
            padding-bottom: 80px;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            position: relative;
            min-height: 600px;
            display: flex;
            align-items: center;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(135deg, rgba(6,35,21,0.85) 0%, rgba(11,60,37,0.7) 100%);
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(255,204,0,0.15);
            border: 1px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-title {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 20px;
            color: #FFFFFF;
        }
        .hero-title .highlight {
            color: var(--accent-lime);
        }
        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-light-green);
            margin-bottom: 32px;
            max-width: 700px;
            line-height: 1.7;
        }
        .hero-cta-group {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary-custom {
            background: var(--btn-primary-bg);
            border: none;
            color: var(--btn-primary-text);
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: var(--shadow-sm);
        }
        .btn-primary-custom:hover {
            background: #FFD633;
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(255,204,0,0.5);
            color: var(--btn-primary-text);
        }
        .btn-outline-custom {
            background: transparent;
            border: 2px solid var(--accent-gold);
            color: var(--accent-gold);
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1rem;
        }
        .btn-outline-custom:hover {
            background: rgba(255,204,0,0.1);
            border-color: #FFD633;
            color: #FFD633;
        }
        .hero-stats {
            display: flex;
            gap: 32px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        .stat-item h3 {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 4px;
        }
        .stat-item p {
            color: var(--text-light-green);
            margin: 0;
            font-size: 0.9rem;
        }

        /* Section Common */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: #FFFFFF;
            text-align: left;
        }
        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-light-green);
            margin-bottom: 48px;
            max-width: 650px;
            line-height: 1.7;
        }
        .text-center-custom {
            text-align: left;
        }

        /* Featured Categories */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 24px;
        }
        .category-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 32px 24px;
            transition: var(--transition-base);
            backdrop-filter: blur(5px);
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }
        .category-card:hover {
            background: var(--card-hover-bg);
            border-color: var(--accent-gold);
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .category-icon {
            font-size: 2.5rem;
            color: var(--accent-lime);
            margin-bottom: 16px;
        }
        .category-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #FFFFFF;
        }
        .category-card p {
            color: var(--text-light-green);
            font-size: 0.95rem;
            margin-bottom: 20px;
            flex-grow: 1;
            line-height: 1.6;
        }
        .category-link {
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.95rem;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .category-link:hover {
            color: #FFD633;
            text-decoration: underline;
        }

        /* Hot List */
        .hot-list {
            background: rgba(6,35,21,0.6);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 40px;
            margin-top: 40px;
        }
        .hot-item {
            display: flex;
            align-items: center;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid rgba(255,255,255,0.1);
        }
        .hot-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        .hot-rank {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-gold);
            min-width: 50px;
        }
        .hot-info h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 6px;
            color: #FFFFFF;
        }
        .hot-info p {
            color: var(--text-light-green);
            margin: 0;
            font-size: 0.95rem;
            line-height: 1.5;
        }
        .btn-hot {
            background: var(--accent-lime);
            border: none;
            color: #062315;
            padding: 8px 18px;
            border-radius: 20px;
            font-weight: 700;
            margin-left: auto;
            white-space: nowrap;
        }
        .btn-hot:hover {
            background: #3DD63D;
            transform: scale(1.05);
        }

        /* Testimonial Bubbles */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 28px;
            position: relative;
        }
        .testimonial-card::before {
            content: '“';
            font-size: 3rem;
            color: var(--accent-gold);
            position: absolute;
            top: 10px;
            left: 16px;
            opacity: 0.5;
        }
        .testimonial-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: var(--accent-lime);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            color: #062315;
            margin-bottom: 16px;
        }
        .testimonial-text {
            font-size: 0.95rem;
            color: var(--text-light-green);
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        .testimonial-name {
            font-weight: 700;
            color: #FFFFFF;
        }
        .testimonial-role {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* News List */
        .news-section {
            background: rgba(6,35,21,0.4);
            border-radius: var(--radius-lg);
            padding: 48px;
        }
        .news-list-item {
            display: flex;
            gap: 24px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255,255,255,0.08);
            align-items: flex-start;
        }
        .news-list-item:last-child {
            border-bottom: none;
        }
        .news-date {
            color: var(--accent-gold);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
            min-width: 80px;
        }
        .news-title-link {
            font-weight: 600;
            color: #FFFFFF;
            text-decoration: none;
            font-size: 1.05rem;
            line-height: 1.5;
        }
        .news-title-link:hover {
            color: var(--accent-gold);
            text-decoration: underline;
        }
        .news-excerpt {
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 4px;
        }

        /* FAQ */
        .faq-accordion .accordion-item {
            background: transparent;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm) !important;
            margin-bottom: 12px;
        }
        .faq-accordion .accordion-button {
            background: var(--card-bg);
            color: #FFFFFF;
            font-weight: 700;
            box-shadow: none;
            border-radius: var(--radius-sm) !important;
        }
        .faq-accordion .accordion-button:not(.collapsed) {
            background: var(--card-hover-bg);
            color: var(--accent-gold);
        }
        .faq-accordion .accordion-body {
            background: rgba(11,60,37,0.5);
            color: var(--text-light-green);
            line-height: 1.7;
        }

        /* CTA Bottom */
        .cta-section {
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            padding: 60px 40px;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: rgba(6,35,21,0.85);
        }
        .cta-content {
            position: relative;
            z-index: 2;
        }
        .cta-title {
            font-size: 2rem;
            font-weight: 800;
            color: #FFFFFF;
            margin-bottom: 16px;
        }
        .cta-desc {
            color: var(--text-light-green);
            margin-bottom: 32px;
            font-size: 1.1rem;
        }

        /* Footer */
        .site-footer {
            background: #041A0E;
            border-top: 1px solid var(--border-color);
            padding: 48px 0 24px;
            margin-top: 80px;
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 16px;
        }
        .footer-text {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 8px;
        }
        .footer-links a {
            color: var(--text-light-green);
            text-decoration: none;
            font-size: 0.9rem;
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            margin-top: 40px;
            padding-top: 24px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 1040;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #062315, #0B3C25);
            border: 3px solid var(--accent-gold);
            box-shadow: 0 4px 20px rgba(255,204,0,0.35);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.5rem;
            transition: var(--transition-base);
            animation: floatFAB 3s ease-in-out infinite;
        }
        .fab-left:hover {
            transform: scale(1.15);
            box-shadow: 0 6px 28px rgba(255,204,0,0.55);
        }
        @keyframes floatFAB {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.4rem; }
            .section-title { font-size: 1.8rem; }
        }
        @media (max-width: 768px) {
            .hero-section { padding-top: 100px; min-height: auto; }
            .hero-title { font-size: 2rem; }
            .hero-desc { font-size: 1rem; }
            .hero-stats { gap: 20px; }
            .stat-item h3 { font-size: 1.5rem; }
            .navbar-brand { font-size: 1.1rem; }
            .section-padding { padding: 48px 0; }
            .category-grid { grid-template-columns: 1fr; }
            .hot-item { flex-wrap: wrap; }
            .btn-hot { margin-left: 0; margin-top: 12px; }
        }
        @media (max-width: 520px) {
            .hero-title { font-size: 1.7rem; }
            .hero-cta-group { flex-direction: column; align-items: flex-start; }
            .btn-primary-custom, .btn-outline-custom { width: 100%; text-align: center; }
        }

/* roulang page: article */
:root {
            --primary-bg: #0B1A30;
            --secondary-bg: #0F0C20;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-white: #FFFFFF;
            --text-silver: #A6ACAF;
            --text-muted: #6C757D;
            --card-bg: #132034;
            --card-border: rgba(0, 240, 255, 0.1);
            --btn-gradient: linear-gradient(135deg, #00F0FF, #CCFF00);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.3);
            --shadow-glow: 0 0 25px rgba(204, 255, 0, 0.2);
            --radius-lg: 16px;
            --radius-md: 10px;
            --radius-sm: 6px;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
        }

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

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

        .container-custom {
            width: 100%;
            max-width: 1260px;
            margin: 0 auto;
            padding-left: 20px;
            padding-right: 20px;
        }

        /* Navbar */
        .site-header {
            background: rgba(15, 12, 32, 0.85);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            position: sticky;
            top: 0;
            z-index: 1050;
            transition: var(--transition-smooth);
        }

        .navbar {
            padding-top: 12px;
            padding-bottom: 12px;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white) !important;
            line-height: 1.3;
            text-decoration: none;
            transition: var(--transition-fast);
        }

        .navbar-brand span {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-brand:hover {
            opacity: 0.85;
        }

        .nav-link {
            color: var(--text-silver) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 8px 16px !important;
            border-radius: var(--radius-sm);
            transition: var(--transition-fast);
            margin: 0 3px;
            position: relative;
        }

        .nav-link:hover,
        .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 30px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 3px;
            box-shadow: var(--shadow-neon);
        }

        .navbar-toggler {
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 6px 10px;
            border-radius: var(--radius-sm);
        }

        .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");
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 10px rgba(0, 240, 255, 0.4);
            outline: none;
        }

        .btn-login {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            font-weight: 600;
            padding: 8px 22px;
            border-radius: 50px;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-login:hover {
            background: rgba(0, 240, 255, 0.15);
            box-shadow: var(--shadow-neon);
            color: var(--text-white);
        }

        .btn-signup {
            background: var(--btn-gradient);
            border: none;
            color: #121212;
            font-weight: 700;
            padding: 8px 24px;
            border-radius: 50px;
            font-size: 0.9rem;
            transition: var(--transition-smooth);
            cursor: pointer;
            white-space: nowrap;
            box-shadow: var(--shadow-glow);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 10px 30px rgba(204, 255, 0, 0.4);
            filter: brightness(1.1);
        }

        /* Article Main */
        .article-wrapper {
            background: linear-gradient(180deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            padding: 40px 0 80px;
            min-height: 70vh;
        }

        .article-container {
            background: var(--card-bg);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--card-border);
            box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
        }

        .article-header {
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            padding-bottom: 25px;
            margin-bottom: 35px;
        }

        .article-category-badge {
            display: inline-block;
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.85rem;
            padding: 6px 18px;
            border-radius: 50px;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }

        .article-header h1 {
            font-family: var(--font-heading);
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            line-height: 1.35;
            margin-bottom: 15px;
        }

        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-silver);
            font-size: 0.9rem;
            align-items: center;
        }

        .article-meta i {
            color: var(--accent-cyan);
            margin-right: 6px;
        }

        /* Content Styling */
        .article-body {
            font-size: 1.05rem;
            line-height: 1.75;
            color: #D1D5DB;
        }

        .article-body h2 {
            font-family: var(--font-heading);
            font-size: 1.65rem;
            font-weight: 700;
            color: var(--text-white);
            margin-top: 35px;
            margin-bottom: 18px;
            padding-left: 15px;
            border-left: 4px solid var(--accent-cyan);
            box-shadow: var(--shadow-neon);
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-lime);
            margin-top: 28px;
            margin-bottom: 14px;
        }

        .article-body p {
            margin-bottom: 18px;
            text-align: justify;
        }

        .article-body strong {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .article-body ul,
        .article-body ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }

        .article-body li {
            margin-bottom: 8px;
            padding-left: 8px;
        }

        .article-body a {
            color: var(--accent-cyan);
            text-decoration: underline;
            text-decoration-color: rgba(0, 240, 255, 0.3);
            transition: var(--transition-fast);
        }

        .article-body a:hover {
            text-decoration-color: var(--accent-cyan);
            color: var(--accent-lime);
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--radius-md);
            margin: 20px 0;
            border: 1px solid var(--card-border);
        }

        .article-body blockquote {
            background: rgba(0, 240, 255, 0.05);
            border-left: 4px solid var(--accent-lime);
            padding: 20px 25px;
            margin: 25px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            font-style: italic;
            color: var(--text-silver);
        }

        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            color: var(--text-silver);
        }

        .article-not-found i {
            font-size: 4rem;
            color: var(--accent-cyan);
            opacity: 0.5;
            margin-bottom: 25px;
            display: block;
        }

        .article-not-found h2 {
            color: var(--text-white);
            font-size: 1.8rem;
            margin-bottom: 15px;
        }

        .btn-back-home {
            display: inline-block;
            margin-top: 25px;
            background: var(--btn-gradient);
            color: #121212;
            font-weight: 700;
            padding: 12px 35px;
            border-radius: 50px;
            text-decoration: none;
            transition: var(--transition-smooth);
            box-shadow: 0 5px 20px rgba(204, 255, 0, 0.25);
        }

        .btn-back-home:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 35px rgba(204, 255, 0, 0.45);
            color: #121212;
        }

        /* Related Section */
        .related-section {
            margin-top: 60px;
            padding-top: 40px;
            border-top: 1px solid rgba(0, 240, 255, 0.15);
        }

        .related-section h3 {
            font-family: var(--font-heading);
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 30px;
            text-align: left;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
        }

        .related-card {
            background: rgba(15, 12, 32, 0.6);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: var(--transition-smooth);
            text-decoration: none;
            color: var(--text-silver);
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .related-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-4px);
            color: var(--text-white);
        }

        .related-card-icon {
            font-size: 1.8rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            margin-top: 3px;
        }

        .related-card-content h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 5px;
        }

        .related-card-content p {
            font-size: 0.85rem;
            margin: 0;
            line-height: 1.5;
        }

        /* Footer */
        .site-footer {
            background: #0A0A14;
            border-top: 1px solid rgba(0, 240, 255, 0.2);
            padding: 55px 0 25px;
            color: var(--text-silver);
            font-size: 0.9rem;
        }

        .footer-brand {
            font-family: var(--font-heading);
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--text-white);
            margin-bottom: 15px;
        }

        .footer-text {
            line-height: 1.65;
            margin-bottom: 12px;
        }

        .footer-links {
            list-style: none;
            padding: 0;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

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

        .footer-links a:hover {
            color: var(--accent-cyan);
            padding-left: 5px;
        }

        .footer-bottom {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            text-align: center;
            font-size: 0.85rem;
            color: #6C757D;
        }

        /* FAB */
        .floating-fab {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1040;
            width: 58px;
            height: 58px;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.5);
            transition: var(--transition-smooth);
            animation: fabFloat 3s ease-in-out infinite;
        }

        .floating-fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: inherit;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            z-index: -1;
            opacity: 0.8;
        }

        .floating-fab:hover {
            transform: scale(1.12);
            box-shadow: 0 0 35px rgba(0, 240, 255, 0.8);
        }

        .floating-fab i {
            color: var(--text-white);
            font-size: 1.5rem;
            transition: var(--transition-fast);
        }

        .floating-fab:hover i {
            color: var(--accent-lime);
            text-shadow: 0 0 12px rgba(204, 255, 0, 0.8);
        }

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

        /* Responsive */
        @media (max-width: 992px) {
            .navbar-nav {
                background: rgba(15, 12, 32, 0.98);
                border-radius: var(--radius-md);
                padding: 15px;
                margin-top: 10px;
                border: 1px solid rgba(0, 240, 255, 0.15);
            }
            .d-flex.ms-lg-3 {
                margin-top: 12px;
                justify-content: center;
                gap: 10px;
            }
            .article-container {
                padding: 25px 20px;
            }
            .article-header h1 {
                font-size: 1.7rem;
            }
        }

        @media (max-width: 768px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
            .article-body {
                font-size: 0.98rem;
            }
            .floating-fab {
                width: 50px;
                height: 50px;
                left: 12px;
                bottom: 90px;
            }
            .floating-fab i {
                font-size: 1.2rem;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1rem;
            }
            .btn-login, .btn-signup {
                padding: 7px 16px;
                font-size: 0.82rem;
            }
            .article-header h1 {
                font-size: 1.4rem;
            }
            .article-meta {
                flex-direction: column;
                gap: 8px;
                align-items: flex-start;
            }
        }

/* roulang page: category1 */
:root {
            /* Tropical Rainforest & Golden Sun Palette */
            --bg-primary: #0B3C25;
            --bg-secondary: #062315;
            --accent: #FFCC00;
            --accent-light: #FFD700;
            --highlight: #32CD32;
            --text-primary: #FFFDF0;
            --text-secondary: #C5E2D2;
            --text-muted: #A0C8B0;
            --border: rgba(255, 255, 255, 0.1);
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-sm: 0 2px 8px rgba(0,0,0,0.1);
            --shadow-md: 0 4px 20px rgba(0,0,0,0.15);
            --shadow-lg: 0 8px 40px rgba(0,0,0,0.2);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --font-heading: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            --font-body: 'Segoe UI', system-ui, -apple-system, sans-serif;
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

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

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

        a:hover, a:focus {
            color: var(--accent-light);
            text-decoration: underline;
        }

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

        button:focus:not(:focus-visible) {
            outline: none;
        }

        button:focus-visible {
            outline: 3px solid var(--accent);
            outline-offset: 2px;
        }

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

        h1 { font-size: 2.8rem; }
        h2 { font-size: 2.2rem; }
        h3 { font-size: 1.6rem; }
        h4 { font-size: 1.2rem; }

        p {
            margin-bottom: 1rem;
            line-height: 1.65;
        }

        .container-custom {
            width: 100%;
            max-width: 1240px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1050;
            background: rgba(11, 60, 37, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            padding: 0;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
            transition: all 0.3s ease;
        }

        .navbar {
            padding: 14px 24px;
            transition: padding 0.3s ease;
        }

        .navbar-brand {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.3rem;
            color: var(--text-primary) !important;
            line-height: 1.2;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .navbar-brand span {
            font-size: 0.95rem;
            color: var(--accent);
            font-weight: 600;
        }

        .navbar-brand:hover {
            opacity: 0.9;
        }

        .nav-link {
            font-weight: 600;
            color: var(--text-secondary) !important;
            padding: 8px 16px !important;
            border-radius: 25px;
            transition: all 0.3s ease;
            margin: 0 2px;
            font-size: 0.95rem;
        }

        .nav-link:hover, .nav-link:focus {
            color: var(--accent) !important;
            background: rgba(255, 255, 255, 0.05);
            text-decoration: none;
        }

        .nav-link.active {
            color: var(--bg-primary) !important;
            background: var(--accent) !important;
            box-shadow: 0 2px 10px rgba(255, 204, 0, 0.4);
        }

        .btn-login {
            background: transparent;
            color: var(--accent);
            border: 2px solid var(--accent);
            border-radius: 25px;
            padding: 10px 22px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .btn-login:hover {
            background: var(--accent);
            color: var(--bg-primary);
            border-color: var(--accent);
            box-shadow: 0 4px 15px rgba(255, 204, 0, 0.3);
            transform: translateY(-1px);
        }

        .btn-signup {
            background: var(--accent);
            color: var(--bg-primary);
            border: 2px solid var(--accent);
            border-radius: 25px;
            padding: 10px 22px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all 0.3s ease;
        }

        .btn-signup:hover {
            background: var(--accent-light);
            border-color: var(--accent-light);
            box-shadow: 0 4px 15px rgba(255, 215, 0, 0.4);
            transform: translateY(-1px);
        }

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

        .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(255, 215, 0, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Page Banner */
        .page-banner {
            margin-top: 90px;
            padding: 80px 0 60px;
            background: radial-gradient(ellipse at center, rgba(11, 60, 37, 0.7) 0%, rgba(6, 35, 21, 0.95) 100%);
            position: relative;
            overflow: hidden;
            border-bottom: 3px solid var(--accent);
        }

        .banner-bg-overlay {
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .page-banner .container-custom {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            gap: 8px;
            flex-wrap: wrap;
            align-items: center;
            margin-bottom: 20px;
            font-size: 0.9rem;
            color: var(--text-secondary);
        }

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

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

        /* Main Content Styling */
        main {
            padding: 60px 0;
        }

        .section {
            margin-bottom: 60px;
        }

        .section-title {
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: var(--text-primary);
            position: relative;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--accent);
            display: inline-block;
        }

        .criteria-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .criteria-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
            border-color: var(--accent);
        }

        .criteria-icon {
            width: 70px;
            height: 70px;
            background: var(--accent);
            color: var(--bg-primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 2rem;
            margin-bottom: 20px;
        }

        .criteria-card h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: var(--accent);
        }

        .criteria-card p {
            color: var(--text-secondary);
            line-height: 1.7;
        }

        .gateway-item {
            background: rgba(255, 255, 255, 0.04);
            backdrop-filter: blur(10px);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px;
            margin-bottom: 20px;
            transition: var(--transition);
            display: flex;
            gap: 24px;
            align-items: flex-start;
        }

        .gateway-item:hover {
            border-color: var(--accent);
            box-shadow: var(--shadow-md);
            transform: translateY(-2px);
        }

        .gateway-rank {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent);
            min-width: 60px;
            text-align: center;
            background: rgba(255, 204, 0, 0.1);
            padding: 15px;
            border-radius: var(--radius-sm);
        }

        .gateway-content {
            flex-grow: 1;
        }

        .gateway-content h3 {
            color: var(--text-primary);
            font-size: 1.6rem;
            margin-bottom: 10px;
        }

        .badge-trust {
            background: var(--highlight);
            color: var(--bg-primary);
            padding: 5px 12px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.8rem;
            display: inline-block;
            margin-bottom: 12px;
        }

        .btn-gateway {
            background: var(--accent);
            color: var(--bg-primary);
            border: none;
            border-radius: 25px;
            padding: 12px 28px;
            font-weight: 700;
            transition: all 0.3s ease;
            display: inline-block;
            margin-top: 12px;
        }

        .btn-gateway:hover {
            background: var(--accent-light);
            box-shadow: 0 4px 15px rgba(255, 215, 0, 0.5);
            transform: translateY(-2px);
            color: var(--bg-primary);
        }

        .flow-step {
            background: rgba(255, 204, 0, 0.05);
            border-left: 4px solid var(--accent);
            padding: 20px;
            margin-bottom: 15px;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            transition: var(--transition);
        }

        .flow-step:hover {
            border-left-width: 8px;
            background: rgba(255, 204, 0, 0.08);
        }

        .flow-number {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent);
            margin-bottom: 10px;
        }

        .faq-accordion .accordion-button:not(.collapsed) {
            background: rgba(255, 204, 0, 0.1);
            color: var(--accent);
            box-shadow: none;
            border: 1px solid var(--accent);
        }

        .faq-accordion .accordion-button {
            background: rgba(255, 255, 255, 0.03);
            color: var(--text-primary);
            border: 1px solid var(--border);
            font-weight: 600;
            transition: all 0.3s ease;
        }

        .faq-accordion .accordion-body {
            background: rgba(255, 255, 255, 0.02);
            color: var(--text-secondary);
            border: 1px solid var(--border);
            border-top: none;
        }

        .cta-section {
            background: radial-gradient(circle at 30% 20%, rgba(11, 60, 37, 0.8) 0%, rgba(6, 35, 21, 0.95) 100%);
            border: 2px solid var(--accent);
            border-radius: var(--radius);
            padding: 50px;
            text-align: center;
        }

        .btn-cta {
            background: var(--accent);
            color: var(--bg-primary);
            border: none;
            border-radius: 25px;
            padding: 15px 40px;
            font-weight: 800;
            font-size: 1.1rem;
            transition: all 0.3s ease;
            display: inline-block;
        }

        .btn-cta:hover {
            background: var(--accent-light);
            box-shadow: 0 8px 25px rgba(255, 215, 0, 0.6);
            transform: translateY(-2px);
            color: var(--bg-primary);
        }

        /* Footer */
        .site-footer {
            background: var(--bg-secondary);
            padding: 60px 0 20px;
            border-top: 3px solid var(--accent);
            margin-top: 60px;
        }

        .footer-brand {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent);
            margin-bottom: 12px;
        }

        .footer-text {
            color: var(--text-muted);
            font-size: 0.95rem;
            line-height: 1.7;
        }

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

        .footer-links li {
            margin-bottom: 8px;
        }

        .footer-links a {
            color: var(--text-secondary);
            transition: all 0.3s ease;
        }

        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid var(--border);
            margin-top: 30px;
            padding-top: 20px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            h1 { font-size: 2.2rem; }
            h2 { font-size: 1.8rem; }
            .gateway-item {
                flex-direction: column;
                align-items: flex-start;
            }
            .cta-section {
                padding: 30px;
            }
        }

        @media (max-width: 768px) {
            h1 { font-size: 1.9rem; }
            .section-title { font-size: 1.7rem; }
            .navbar-brand { font-size: 1rem; }
            .navbar { padding: 12px 16px; }
            .criteria-card { padding: 20px; }
            .gateway-rank { min-width: 50px; padding: 10px; }
            .page-banner { padding: 50px 0 30px; margin-top: 70px; }
        }

        @media (max-width: 520px) {
            h1 { font-size: 1.6rem; }
            h2 { font-size: 1.4rem; }
            .container-custom { padding: 0 16px; }
            .btn-login, .btn-signup { padding: 8px 16px; font-size: 0.8rem; }
            .cta-section { padding: 20px; }
            .criteria-card { padding: 15px; }
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--bg-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            box-shadow: 0 4px 20px rgba(255, 204, 0, 0.35);
            transition: all 0.3s ease;
            border: 2px solid var(--accent-light);
        }

        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 6px 25px rgba(255, 215, 0, 0.5);
        }

/* roulang page: category2 */
:root {
            --bg-primary: #0B3C25;
            --bg-deep: #062315;
            --accent-gold: #FFCC00;
            --accent-lime: #32CD32;
            --text-white: #FFFDF0;
            --text-light: #C5E2D2;
            --text-muted: #8DAB9A;
            --border-gold: rgba(255, 204, 0, 0.35);
            --border-lime: rgba(50, 205, 50, 0.45);
            --card-bg: rgba(255, 255, 255, 0.04);
            --shadow-gold: 0 4px 20px rgba(255, 204, 0, 0.12);
            --shadow-lime: 0 4px 18px rgba(50, 205, 50, 0.1);
            --radius-md: 0.75rem;
            --radius-lg: 1rem;
            --radius-xl: 1.5rem;
            --font-body: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition: 0.25s ease;
        }

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

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

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

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

        .container-custom {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ---------- HEADER / NAV ---------- */
        .site-header {
            background: rgba(6, 35, 21, 0.92);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-gold);
            position: sticky;
            top: 0;
            z-index: 1050;
            box-shadow: var(--shadow-gold);
        }

        .navbar {
            padding-top: 0.8rem;
            padding-bottom: 0.8rem;
        }

        .navbar-brand {
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--accent-gold) !important;
            line-height: 1.3;
            letter-spacing: -0.2px;
        }

        .navbar-brand span {
            color: var(--text-light);
            font-weight: 600;
            font-size: 0.9rem;
        }

        .navbar-nav .nav-link {
            color: var(--text-light) !important;
            font-weight: 600;
            padding: 0.5rem 1rem;
            border-radius: 2rem;
            transition: var(--transition);
        }

        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(255, 204, 0, 0.08);
        }

        .navbar-toggler {
            border-color: var(--accent-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(255, 204, 0, 0.85)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        .btn-login {
            color: var(--accent-gold);
            border: 1px solid var(--accent-gold);
            background: transparent;
            font-weight: 600;
            padding: 0.45rem 1.3rem;
            border-radius: 2rem;
            transition: var(--transition);
        }
        .btn-login:hover {
            background: rgba(255, 204, 0, 0.12);
            color: var(--accent-gold);
            border-color: var(--accent-gold);
        }

        .btn-signup {
            background: linear-gradient(135deg, var(--accent-gold), #e6b800);
            border: none;
            color: #062315;
            font-weight: 700;
            padding: 0.45rem 1.4rem;
            border-radius: 2rem;
            box-shadow: 0 0 14px rgba(255, 204, 0, 0.45);
            transition: var(--transition);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, #ffda33, #ffcc00);
            box-shadow: 0 0 20px rgba(255, 204, 0, 0.65);
            transform: translateY(-1px);
        }

        /* ---------- HERO ---------- */
        .hero-section {
            background: linear-gradient(135deg, var(--bg-deep) 0%, var(--bg-primary) 100%);
            padding: 3.5rem 0 3rem;
            position: relative;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: -60px;
            right: -60px;
            width: 320px;
            height: 320px;
            background: radial-gradient(circle, rgba(50,205,50,0.18) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }

        .hero-badge {
            display: inline-block;
            background: rgba(255, 204, 0, 0.14);
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.85rem;
            padding: 0.35rem 1.1rem;
            border-radius: 2rem;
            border: 1px solid var(--border-gold);
            margin-bottom: 1.2rem;
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 900;
            line-height: 1.25;
            color: var(--text-white);
            margin-bottom: 1.2rem;
            letter-spacing: -0.5px;
        }
        .hero-title .highlight {
            color: var(--accent-gold);
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-light);
            max-width: 650px;
            line-height: 1.7;
            margin-bottom: 2rem;
        }

        .hero-stat-box {
            background: rgba(255,255,255,0.03);
            border: 1px solid var(--border-lime);
            border-radius: var(--radius-lg);
            padding: 1.2rem 1.5rem;
            backdrop-filter: blur(6px);
        }
        .hero-stat-number {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--accent-lime);
        }
        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 0.2rem;
        }

        /* ---------- SECTIONS ---------- */
        .section-padding {
            padding: 3.5rem 0;
        }
        .section-dark {
            background: var(--bg-deep);
        }
        .section-primary {
            background: var(--bg-primary);
        }

        .section-label {
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-gold);
            margin-bottom: 0.5rem;
        }
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text-white);
            margin-bottom: 2rem;
        }
        .section-title .accent {
            color: var(--accent-lime);
        }

        /* ---------- CARDS ---------- */
        .guide-card {
            background: var(--card-bg);
            border: 1px solid rgba(255,255,255,0.08);
            border-radius: var(--radius-lg);
            padding: 1.8rem;
            height: 100%;
            transition: var(--transition);
            position: relative;
        }
        .guide-card:hover {
            border-color: var(--border-lime);
            box-shadow: var(--shadow-lime);
            transform: translateY(-3px);
        }
        .guide-card-icon {
            font-size: 2.2rem;
            color: var(--accent-lime);
            margin-bottom: 1rem;
        }
        .guide-card-title {
            font-weight: 700;
            font-size: 1.25rem;
            color: var(--text-white);
            margin-bottom: 0.6rem;
        }
        .guide-card-text {
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.65;
        }

        .step-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
            padding: 1.3rem 0;
            border-bottom: 1px solid rgba(255,255,255,0.06);
        }
        .step-item:last-child {
            border-bottom: none;
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            background: linear-gradient(135deg, var(--accent-gold), #e6b800);
            color: #062315;
            border-radius: 50%;
            font-weight: 900;
            font-size: 1.3rem;
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .step-body h4 {
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-white);
            margin-bottom: 0.3rem;
        }
        .step-body p {
            color: var(--text-light);
            font-size: 0.95rem;
            margin: 0;
        }

        /* ---------- QUOTE TESTIMONIAL ---------- */
        .testimonial-block {
            background: var(--card-bg);
            border-left: 4px solid var(--accent-gold);
            border-radius: 0 var(--radius-lg) var(--radius-lg) 0;
            padding: 1.8rem;
        }
        .testimonial-text {
            font-style: italic;
            font-size: 1.1rem;
            color: var(--text-light);
            line-height: 1.7;
        }
        .testimonial-author {
            font-weight: 700;
            color: var(--accent-gold);
            margin-top: 1rem;
        }

        /* ---------- FAQ ---------- */
        .faq-item {
            border: 1px solid rgba(255,255,255,0.07);
            border-radius: var(--radius-md);
            margin-bottom: 0.8rem;
            background: var(--card-bg);
            overflow: hidden;
        }
        .faq-question {
            background: none;
            border: none;
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.05rem;
            padding: 1.1rem 1.4rem;
            width: 100%;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            transition: var(--transition);
        }
        .faq-question:hover {
            color: var(--accent-gold);
        }
        .faq-answer {
            padding: 0 1.4rem 1.1rem;
            color: var(--text-light);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }
        .faq-item.open .faq-question {
            color: var(--accent-gold);
        }

        /* ---------- CTA ---------- */
        .cta-section {
            background: linear-gradient(135deg, var(--bg-primary), #0a4f30);
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-xl);
            padding: 2.5rem;
            text-align: center;
        }
        .cta-title {
            font-size: 1.9rem;
            font-weight: 900;
            color: var(--accent-gold);
            margin-bottom: 0.8rem;
        }
        .cta-text {
            color: var(--text-light);
            font-size: 1.05rem;
            max-width: 600px;
            margin: 0 auto 1.8rem;
        }
        .btn-cta-primary {
            background: var(--accent-gold);
            border: none;
            color: #062315;
            font-weight: 800;
            font-size: 1.05rem;
            padding: 0.8rem 2.4rem;
            border-radius: 2.5rem;
            box-shadow: 0 0 22px rgba(255, 204, 0, 0.5);
            transition: var(--transition);
        }
        .btn-cta-primary:hover {
            background: #ffda33;
            box-shadow: 0 0 30px rgba(255, 204, 0, 0.7);
            transform: translateY(-2px);
        }

        /* ---------- FOOTER ---------- */
        .site-footer {
            background: #031a0f;
            border-top: 2px solid var(--border-gold);
            padding: 3rem 0 1.5rem;
            color: var(--text-light);
        }
        .footer-brand {
            font-weight: 800;
            font-size: 1.2rem;
            color: var(--accent-gold);
            margin-bottom: 0.8rem;
        }
        .footer-text {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li {
            margin-bottom: 0.45rem;
        }
        .footer-links a {
            color: var(--text-light);
            font-size: 0.9rem;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.07);
            margin-top: 2rem;
            padding-top: 1.2rem;
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* ---------- RESPONSIVE ---------- */
        @media (max-width: 991px) {
            .navbar-nav {
                margin-top: 0.8rem;
            }
            .hero-title {
                font-size: 2rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }
        @media (max-width: 767px) {
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-stat-box {
                margin-top: 1rem;
            }
            .cta-section {
                padding: 1.8rem;
            }
            .cta-title {
                font-size: 1.5rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.45rem;
            }
            .guide-card {
                padding: 1.3rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #0B3C25;
            --secondary-bg: #062315;
            --accent-gold: #FFCC00;
            --accent-lime: #32CD32;
            --text-white: #FFFDF0;
            --text-light: #C5E2D2;
            --text-body: #D1F2EB;
            --btn-login-bg: transparent;
            --btn-login-text: #FFCC00;
            --btn-login-border: #FFCC00;
            --btn-signup-bg: linear-gradient(135deg, #FFCC00, #FF9F00);
            --btn-signup-text: #0B3C25;
            --card-bg: rgba(11, 60, 37, 0.8);
            --card-border: #32CD32;
            --border-glow: #FFCC00;
            --shadow-gold: 0 4px 20px rgba(255, 204, 0, 0.3);
            --radius-md: 16px;
            --radius-lg: 24px;
            --transition: all 0.3s ease;
        }

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

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

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

        /* Header & Navigation */
        .site-header {
            background: var(--secondary-bg);
            border-bottom: 2px solid var(--accent-gold);
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .navbar {
            padding: 12px 0;
        }

        .navbar-brand {
            color: var(--text-white) !important;
            font-weight: 700;
            font-size: 1.2rem;
            text-decoration: none;
            line-height: 1.3;
        }
        .navbar-brand span {
            color: var(--accent-gold);
            font-size: 0.9rem;
            display: block;
        }

        .nav-link {
            color: var(--text-light) !important;
            font-weight: 500;
            font-size: 0.95rem;
            transition: var(--transition);
            padding: 8px 16px !important;
            border-radius: 20px;
        }
        .nav-link:hover, .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(255, 204, 0, 0.1);
        }
        .nav-link.active {
            font-weight: 600;
            border-bottom: 2px solid var(--accent-gold);
        }

        .navbar-toggler {
            border-color: var(--accent-gold);
        }
        .navbar-toggler-icon {
            background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='%23FFCC00' viewBox='0 0 16 16'%3E%3Cpath d='M2.5 11.5A.5.5 0 0 1 3 11h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4A.5.5 0 0 1 3 7h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5zm0-4A.5.5 0 0 1 3 3h10a.5.5 0 0 1 0 1H3a.5.5 0 0 1-.5-.5z'/%3E%3C/svg%3E");
        }

        .btn-login {
            background: var(--btn-login-bg);
            color: var(--btn-login-text);
            border: 2px solid var(--btn-login-border);
            border-radius: 25px;
            padding: 8px 24px;
            font-weight: 600;
            transition: var(--transition);
        }
        .btn-login:hover {
            background: rgba(255, 204, 0, 0.15);
            color: var(--accent-gold);
            box-shadow: var(--shadow-gold);
        }

        .btn-signup {
            background: var(--btn-signup-bg);
            color: var(--btn-signup-text);
            border: none;
            border-radius: 25px;
            padding: 8px 24px;
            font-weight: 700;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(255, 204, 0, 0.4);
        }
        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 204, 0, 0.5);
        }

        /* Hero */
        .hero-promo {
            background: linear-gradient(135deg, var(--secondary-bg) 0%, var(--primary-bg) 100%);
            padding: 80px 0 60px;
            position: relative;
            overflow: hidden;
        }
        .hero-promo::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-promo h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            text-align: left;
            line-height: 1.2;
            margin-bottom: 20px;
        }
        .hero-promo h1 span {
            color: var(--accent-gold);
            display: block;
        }
        .hero-promo .lead {
            font-size: 1.2rem;
            color: var(--text-light);
            text-align: left;
            margin-bottom: 30px;
        }

        .hero-visual {
            position: relative;
            z-index: 2;
        }
        .hero-visual img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            box-shadow: 0 10px 40px rgba(0, 0, 0, 0.6);
            border: 3px solid var(--accent-gold);
        }

        /* Group Buy CTA */
        .group-buy-section {
            background: var(--card-bg);
            border: 1px solid var(--accent-gold);
            border-radius: var(--radius-lg);
            padding: 25px 20px;
            backdrop-filter: blur(10px);
        }
        .group-buy-section h3 {
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .group-buy-section .people-count {
            color: var(--text-white);
            font-size: 1.5rem;
            font-weight: 800;
        }
        .group-buy-section .people-count strong {
            color: var(--accent-lime);
            font-size: 2rem;
        }
        .btn-start-group {
            background: var(--accent-gold);
            color: var(--primary-bg);
            font-weight: 700;
            padding: 14px 30px;
            border-radius: 30px;
            border: none;
            transition: var(--transition);
            width: 100%;
            box-shadow: var(--shadow-gold);
        }
        .btn-start-group:hover {
            background: #FFE066;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 204, 0, 0.7);
        }
        .btn-join-group {
            background: transparent;
            color: var(--accent-gold);
            border: 2px solid var(--accent-gold);
            font-weight: 700;
            padding: 14px 30px;
            border-radius: 30px;
            transition: var(--transition);
            width: 100%;
        }
        .btn-join-group:hover {
            background: rgba(255, 204, 0, 0.15);
            box-shadow: var(--shadow-gold);
        }

        /* Sections */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            text-align: left;
            margin-bottom: 15px;
        }
        .section-desc {
            font-size: 1.1rem;
            color: var(--text-light);
            text-align: left;
            margin-bottom: 40px;
            line-height: 1.7;
        }

        /* Promo Cards */
        .promo-card {
            background: var(--card-bg);
            border: 1px solid rgba(50, 205, 50, 0.3);
            border-radius: var(--radius-md);
            padding: 25px;
            transition: var(--transition);
            height: 100%;
            backdrop-filter: blur(5px);
        }
        .promo-card:hover {
            border-color: var(--accent-gold);
            box-shadow: 0 8px 30px rgba(255, 204, 0, 0.2);
            transform: translateY(-5px);
        }
        .promo-icon {
            font-size: 2.5rem;
            color: var(--accent-gold);
            margin-bottom: 15px;
        }
        .promo-card h3 {
            color: var(--text-white);
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 10px;
        }
        .promo-card p {
            color: var(--text-light);
            font-size: 0.95rem;
        }
        .promo-tag {
            background: var(--accent-lime);
            color: var(--primary-bg);
            font-weight: 700;
            font-size: 0.75rem;
            padding: 4px 12px;
            border-radius: 15px;
            display: inline-block;
            margin-bottom: 10px;
        }

        /* How It Works */
        .step-list {
            list-style: none;
            padding: 0;
        }
        .step-list li {
            display: flex;
            align-items: flex-start;
            margin-bottom: 25px;
            padding: 20px;
            background: var(--card-bg);
            border-radius: var(--radius-md);
            border-left: 4px solid var(--accent-gold);
            transition: var(--transition);
        }
        .step-list li:hover {
            background: rgba(11, 60, 37, 0.95);
            border-left-color: var(--accent-lime);
        }
        .step-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-gold);
            min-width: 60px;
        }
        .step-content h4 {
            color: var(--text-white);
            font-weight: 600;
            margin-bottom: 5px;
        }
        .step-content p {
            color: var(--text-light);
            margin: 0;
        }

        /* FAQ */
        .faq-section .accordion-button {
            background: var(--card-bg);
            color: var(--text-white);
            font-weight: 600;
            border: 1px solid rgba(50, 205, 50, 0.3);
            border-radius: var(--radius-md) !important;
            padding: 18px 25px;
            transition: var(--transition);
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(255, 204, 0, 0.15);
            color: var(--accent-gold);
            border-color: var(--accent-gold);
            box-shadow: none;
        }
        .faq-section .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(255, 204, 0, 0.3);
            border-color: var(--accent-gold);
        }
        .faq-section .accordion-body {
            background: var(--card-bg);
            color: var(--text-light);
            border-radius: 0 0 var(--radius-md) var(--radius-md);
            padding: 20px 25px;
            line-height: 1.7;
        }

        /* CTA Banner */
        .cta-banner {
            background: linear-gradient(135deg, var(--secondary-bg), var(--primary-bg));
            border: 2px solid var(--accent-gold);
            border-radius: var(--radius-lg);
            padding: 50px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }
        .cta-banner > * { position: relative; z-index: 2; }
        .cta-banner h2 {
            color: var(--text-white);
            font-weight: 800;
            font-size: 2rem;
            margin-bottom: 15px;
        }
        .cta-banner p {
            color: var(--text-light);
            font-size: 1.1rem;
            margin-bottom: 25px;
        }
        .btn-cta {
            background: var(--btn-signup-bg);
            color: var(--btn-signup-text);
            font-weight: 700;
            padding: 15px 40px;
            border-radius: 30px;
            border: none;
            font-size: 1.1rem;
            box-shadow: var(--shadow-gold);
            transition: var(--transition);
        }
        .btn-cta:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(255, 204, 0, 0.6);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 2px solid var(--accent-gold);
            padding: 50px 0 30px;
            margin-top: 60px;
        }
        .footer-brand {
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1.3rem;
            margin-bottom: 15px;
        }
        .footer-text {
            color: var(--text-light);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-links {
            list-style: none;
            padding: 0;
        }
        .footer-links li { margin-bottom: 8px; }
        .footer-links a {
            color: var(--text-light);
            text-decoration: none;
            transition: var(--transition);
        }
        .footer-links a:hover {
            color: var(--accent-gold);
            padding-left: 5px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 204, 0, 0.2);
            margin-top: 30px;
            padding-top: 20px;
            text-align: center;
            color: var(--text-light);
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 991px) {
            .navbar-nav {
                background: var(--secondary-bg);
                padding: 15px;
                border-radius: var(--radius-md);
                margin-top: 10px;
            }
            .hero-promo h1 { font-size: 2rem; }
            .section-title { font-size: 1.6rem; }
            .cta-banner { padding: 30px 20px; }
            .cta-banner h2 { font-size: 1.6rem; }
        }
        @media (max-width: 767px) {
            .hero-promo { padding: 50px 0 40px; }
            .hero-promo h1 { font-size: 1.8rem; }
            .group-buy-section { margin-top: 30px; }
            .btn-start-group, .btn-join-group { width: 100%; margin-bottom: 10px; }
            .promo-card { margin-bottom: 20px; }
        }