/* roulang page: index */
:root {
            --bg-primary: #0F0C20;
            --bg-secondary: #0B1A30;
            --bg-card: #16142B;
            --accent-cyan: #00F0FF;
            --accent-lime: #CCFF00;
            --text-primary: #FFFFFF;
            --text-secondary: #A6ACAF;
            --text-muted: #7B8290;
            --border-neon: rgba(0, 240, 255, 0.25);
            --shadow-neon: 0 0 15px rgba(0, 240, 255, 0.35);
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --spacing-xs: 8px;
            --spacing-sm: 16px;
            --spacing-md: 32px;
            --spacing-lg: 56px;
            --spacing-xl: 80px;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

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

        body {
            font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 100%);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            overflow-x: hidden;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover { color: var(--accent-lime); }
        a:focus-visible { outline: 2px solid var(--accent-lime); outline-offset: 3px; }

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

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

        /* NAVBAR */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1050;
            background: rgba(15, 12, 32, 0.92);
            backdrop-filter: blur(16px);
            border-bottom: 1px solid var(--border-neon);
            padding: 14px 0;
        }
        .navbar {
            background: transparent !important;
            padding: 0;
        }
        .navbar-brand {
            font-weight: 800;
            font-size: 1.2rem;
            letter-spacing: 0.5px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .navbar-brand i {
            color: var(--accent-cyan);
            font-size: 1.6rem;
        }
        .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-nav .nav-link {
            color: var(--text-secondary);
            font-weight: 600;
            margin: 0 10px;
            padding: 8px 14px;
            border-radius: 50px;
            transition: all var(--transition-fast);
            position: relative;
        }
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.08);
        }
        .navbar-nav .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-lime);
            border-radius: 2px;
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 20px;
        }
        .btn-login {
            background: transparent;
            border: 1px solid var(--text-secondary);
            color: var(--text-primary);
            padding: 8px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            border: none;
            color: var(--bg-primary);
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.3);
        }
        .btn-signup:hover {
            box-shadow: 0 0 20px rgba(0, 240, 255, 0.55);
            transform: translateY(-1px);
            color: var(--bg-primary);
        }
        .navbar-toggler {
            border: 1px solid var(--border-neon);
            color: var(--accent-cyan);
            padding: 6px 10px;
        }
        .navbar-toggler:focus { box-shadow: 0 0 8px rgba(0, 240, 255, 0.3); }
        .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='%2300F0FF' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* HERO - Group Buy Conversion */
        .hero-section {
            position: relative;
            padding: var(--spacing-xl) 0 var(--spacing-lg);
            background-image: linear-gradient(rgba(15,12,32,0.88), rgba(15,12,32,0.94)), url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            border-bottom: 1px solid var(--border-neon);
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 40%, rgba(0,240,255,0.08) 0%, transparent 60%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-block;
            background: rgba(204, 255, 0, 0.12);
            border: 1px solid rgba(204, 255, 0, 0.4);
            color: var(--accent-lime);
            padding: 6px 18px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.85rem;
            margin-bottom: var(--spacing-sm);
            letter-spacing: 0.5px;
        }
        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.6rem);
            font-weight: 900;
            line-height: 1.15;
            margin-bottom: var(--spacing-sm);
            color: var(--text-primary);
        }
        .hero-title .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-secondary);
            max-width: 720px;
            margin-bottom: var(--spacing-md);
            line-height: 1.7;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-bottom: var(--spacing-md);
        }
        .btn-primary-hero {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            border: none;
            color: var(--bg-primary);
            padding: 14px 32px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-base);
            box-shadow: 0 4px 20px rgba(0, 240, 255, 0.35);
            white-space: nowrap;
        }
        .btn-primary-hero:hover {
            box-shadow: 0 6px 28px rgba(0, 240, 255, 0.55);
            transform: translateY(-2px);
            color: var(--bg-primary);
        }
        .btn-secondary-hero {
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: var(--text-primary);
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .btn-secondary-hero:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.06);
        }
        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: var(--spacing-sm);
        }
        .hero-stat {
            display: flex;
            align-items: center;
            gap: 10px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .hero-stat i {
            color: var(--accent-lime);
            font-size: 1.2rem;
        }
        .hero-stat strong {
            color: var(--text-primary);
            font-size: 1.1rem;
        }
        .group-buy-panel {
            background: rgba(22, 20, 43, 0.85);
            border: 1px solid var(--border-neon);
            border-radius: var(--radius-lg);
            padding: 28px;
            backdrop-filter: blur(12px);
            position: relative;
            z-index: 2;
        }
        .group-buy-panel h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--accent-cyan);
        }
        .group-buy-panel .group-progress {
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50px;
            overflow: hidden;
            margin: 16px 0 8px;
        }
        .group-buy-panel .group-progress .bar {
            height: 100%;
            background: linear-gradient(90deg, var(--accent-cyan), var(--accent-lime));
            border-radius: 50px;
            width: 72%;
            transition: width 1s ease;
        }
        .group-buy-panel .group-info {
            display: flex;
            justify-content: space-between;
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 18px;
        }
        .group-buy-panel .btn-group {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
        }
        .btn-open-group {
            background: var(--accent-lime);
            color: var(--bg-primary);
            border: none;
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            flex: 1;
            min-width: 120px;
            transition: all var(--transition-fast);
        }
        .btn-open-group:hover {
            background: #e0ff40;
            transform: translateY(-1px);
        }
        .btn-join-group {
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 10px 22px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            flex: 1;
            min-width: 120px;
            transition: all var(--transition-fast);
        }
        .btn-join-group:hover {
            background: rgba(0, 240, 255, 0.08);
        }

        /* SECTION COMMON */
        .section-block {
            padding: var(--spacing-lg) 0;
        }
        .section-header {
            margin-bottom: var(--spacing-md);
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .section-header h2 {
            font-size: clamp(1.6rem, 3vw, 2.2rem);
            font-weight: 800;
            margin-bottom: 6px;
            color: var(--text-primary);
        }
        .section-header .section-desc {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 640px;
            line-height: 1.6;
        }
        .section-link {
            color: var(--accent-cyan);
            font-weight: 600;
            font-size: 0.9rem;
            white-space: nowrap;
        }
        .section-link i {
            margin-left: 6px;
            transition: transform var(--transition-fast);
        }
        .section-link:hover i { transform: translateX(4px); }

        /* TRENDING / HOT RECOMMENDATIONS */
        .trending-section {
            background: rgba(11, 26, 48, 0.5);
        }
        .trending-grid {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 20px;
        }
        .trending-main-card {
            position: relative;
            border-radius: var(--radius-lg);
            overflow: hidden;
            min-height: 320px;
            display: flex;
            align-items: flex-end;
            background-size: cover;
            background-position: center;
            border: 1px solid var(--border-neon);
            transition: all var(--transition-base);
        }
        .trending-main-card:hover {
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
        }
        .trending-main-card .overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15,12,32,0.9) 100%);
        }
        .trending-main-card .card-content {
            position: relative;
            z-index: 2;
            padding: 24px;
            width: 100%;
        }
        .trending-main-card .badge-hot {
            background: #FF007F;
            color: white;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            letter-spacing: 0.5px;
        }
        .trending-main-card h3 {
            font-size: 1.5rem;
            font-weight: 800;
            margin: 10px 0 6px;
        }
        .trending-main-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 12px;
        }
        .btn-watch-now {
            background: var(--accent-cyan);
            color: var(--bg-primary);
            border: none;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }
        .btn-watch-now:hover {
            background: var(--accent-lime);
            transform: translateY(-1px);
        }
        .trending-small-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .trending-small-card {
            display: flex;
            gap: 14px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 12px 16px;
            transition: all var(--transition-fast);
            cursor: pointer;
        }
        .trending-small-card:hover {
            border-color: var(--accent-cyan);
            background: rgba(0, 240, 255, 0.04);
        }
        .trending-small-card img {
            width: 64px;
            height: 64px;
            object-fit: cover;
            border-radius: var(--radius-sm);
            flex-shrink: 0;
        }
        .trending-small-card .info h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 2px;
        }
        .trending-small-card .info p {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin: 0;
        }
        .trending-small-card .rank {
            color: var(--accent-lime);
            font-weight: 800;
            font-size: 1.1rem;
            min-width: 30px;
        }

        /* CATEGORY / PLAYLIST SECTION */
        .category-section .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 20px;
        }
        .category-card {
            position: relative;
            border-radius: var(--radius-md);
            overflow: hidden;
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            transition: all var(--transition-base);
            text-decoration: none;
            color: var(--text-primary);
            display: block;
        }
        .category-card:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-neon);
            transform: translateY(-3px);
            color: var(--text-primary);
        }
        .category-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
        }
        .category-card .cat-body {
            padding: 16px 18px;
        }
        .category-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .category-card p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin-bottom: 8px;
        }
        .category-card .cat-tag {
            display: inline-block;
            background: rgba(0, 240, 255, 0.1);
            color: var(--accent-cyan);
            padding: 3px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 600;
        }

        /* CMS / NEWS SECTION */
        .news-section {
            background: rgba(11, 26, 48, 0.4);
        }
        .news-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 28px;
        }
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 0;
        }
        .news-item {
            display: flex;
            gap: 16px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition-fast);
            text-decoration: none;
            color: var(--text-primary);
        }
        .news-item:hover {
            padding-left: 8px;
            border-bottom-color: var(--accent-cyan);
            color: var(--text-primary);
        }
        .news-item .news-date {
            color: var(--text-muted);
            font-size: 0.8rem;
            min-width: 80px;
            padding-top: 4px;
        }
        .news-item .news-content h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
            line-height: 1.4;
        }
        .news-item .news-content p {
            color: var(--text-secondary);
            font-size: 0.85rem;
            margin: 0;
        }
        .news-item .news-content .news-cat {
            color: var(--accent-cyan);
            font-size: 0.75rem;
            font-weight: 600;
        }
        .news-sidebar {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md);
            padding: 24px;
            height: fit-content;
        }
        .news-sidebar h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--accent-lime);
        }
        .news-sidebar ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .news-sidebar ul li {
            padding: 10px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }
        .news-sidebar ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .news-sidebar ul li a:hover { color: var(--accent-cyan); }

        /* QUICK FAQ */
        .faq-section .accordion-item {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-md) !important;
            margin-bottom: 12px;
            overflow: hidden;
        }
        .faq-section .accordion-button {
            background: transparent;
            color: var(--text-primary);
            font-weight: 700;
            padding: 18px 24px;
            border-radius: var(--radius-md) !important;
            box-shadow: none;
        }
        .faq-section .accordion-button:not(.collapsed) {
            background: rgba(0, 240, 255, 0.05);
            color: var(--accent-cyan);
            box-shadow: none;
        }
        .faq-section .accordion-button:focus {
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.3);
            border-color: var(--accent-cyan);
        }
        .faq-section .accordion-body {
            color: var(--text-secondary);
            padding: 16px 24px 20px;
            line-height: 1.7;
        }

        /* PACKAGE COMPARISON */
        .package-section .package-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .package-card {
            background: var(--bg-card);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-lg);
            padding: 28px;
            position: relative;
            transition: all var(--transition-base);
        }
        .package-card.featured {
            border-color: var(--accent-lime);
            box-shadow: 0 0 25px rgba(204, 255, 0, 0.2);
            background: rgba(22, 20, 43, 0.95);
        }
        .package-card:hover {
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
        }
        .package-card .package-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background: var(--accent-lime);
            color: var(--bg-primary);
            padding: 4px 14px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.75rem;
            letter-spacing: 0.5px;
        }
        .package-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 4px;
        }
        .package-card .price {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-cyan);
            margin: 10px 0;
        }
        .package-card .price small {
            font-size: 0.9rem;
            color: var(--text-secondary);
            font-weight: 400;
        }
        .package-card ul {
            list-style: none;
            padding: 0;
            margin: 16px 0;
        }
        .package-card ul li {
            padding: 6px 0;
            color: var(--text-secondary);
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .package-card ul li i {
            color: var(--accent-lime);
            font-size: 0.85rem;
        }
        .btn-package {
            width: 100%;
            background: transparent;
            border: 1px solid var(--accent-cyan);
            color: var(--accent-cyan);
            padding: 12px;
            border-radius: 50px;
            font-weight: 700;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .btn-package:hover {
            background: rgba(0, 240, 255, 0.08);
        }
        .package-card.featured .btn-package {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            color: var(--bg-primary);
            border: none;
        }
        .package-card.featured .btn-package:hover {
            box-shadow: 0 4px 16px rgba(0, 240, 255, 0.4);
        }

        /* FLOATING ACTION BUTTON */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1060;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: rgba(0, 0, 0, 0.65);
            backdrop-filter: blur(8px);
            border: 2px solid var(--accent-cyan);
            color: var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 0 15px rgba(0, 240, 255, 0.45);
            transition: all var(--transition-base);
            opacity: 0.6;
            animation: fabBreathe 3s ease-in-out infinite;
            text-decoration: none;
        }
        .fab-support:hover {
            opacity: 1;
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.7);
            color: var(--accent-lime);
            border-color: var(--accent-lime);
            transform: scale(1.08);
        }
        .fab-support:active { transform: scale(0.95); }
        .fab-support .fab-dot {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: dotBlink 1.5s ease-in-out infinite;
        }
        @keyframes fabBreathe {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-6px); }
        }
        @keyframes dotBlink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* FOOTER */
        .site-footer {
            background: rgba(10, 8, 24, 0.95);
            border-top: 1px solid var(--border-neon);
            padding: var(--spacing-lg) 0 0;
            margin-top: var(--spacing-lg);
        }
        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-brand span {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .site-footer p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.7;
        }
        .site-footer h5 {
            color: var(--accent-cyan);
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
        }
        .site-footer ul li {
            margin-bottom: 8px;
        }
        .site-footer ul li a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .site-footer ul li a:hover {
            color: var(--accent-lime);
            padding-left: 4px;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.06);
            padding: 18px 0;
            margin-top: var(--spacing-md);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
        }
        .footer-bottom p {
            color: var(--text-muted);
            font-size: 0.8rem;
            margin: 0;
        }
        .footer-bottom .payment-icons {
            display: flex;
            gap: 12px;
            align-items: center;
        }
        .payment-icons .pay-badge {
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            font-weight: 600;
        }
        .badge-18 {
            display: inline-block;
            background: #D32F2F;
            color: white;
            padding: 4px 12px;
            border-radius: 4px;
            font-weight: 800;
            font-size: 0.8rem;
            margin-right: 8px;
        }

        /* RESPONSIVE */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(15, 12, 32, 0.98);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 12px;
                border: 1px solid var(--border-neon);
            }
            .nav-auth {
                margin-left: 0;
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
            }
            .trending-grid {
                grid-template-columns: 1fr;
            }
            .news-layout {
                grid-template-columns: 1fr;
            }
            .package-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .package-card.featured {
                transform: none;
            }
        }
        @media (max-width: 767px) {
            .hero-section {
                padding: var(--spacing-md) 0;
            }
            .hero-title {
                font-size: 1.9rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-primary-hero, .btn-secondary-hero {
                width: 100%;
                text-align: center;
            }
            .group-buy-panel {
                margin-top: 20px;
                padding: 20px;
            }
            .section-block {
                padding: var(--spacing-md) 0;
            }
            .section-header {
                flex-direction: column;
                align-items: flex-start;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .fab-support {
                left: 12px;
                bottom: 80px;
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
            }
        }
        @media (max-width: 520px) {
            .hero-title {
                font-size: 1.6rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .trending-main-card {
                min-height: 240px;
            }
            .news-item {
                flex-direction: column;
                gap: 4px;
            }
            .news-item .news-date {
                min-width: auto;
            }
            .navbar-brand {
                font-size: 0.95rem;
            }
            .navbar-brand i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category1 */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: #131A2B;
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8B95A9;
            --border-color: #1E2D4A;
            --border-glow: rgba(0, 82, 255, 0.4);
            --border-cyan-glow: rgba(0, 240, 255, 0.5);
            --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
            --shadow-glow: 0 0 20px rgba(0, 82, 255, 0.3);
            --shadow-cyan-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 30px;
            --font-base: 16px;
            --transition-fast: 0.2s ease;
            --transition-medium: 0.35s ease;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            font-size: var(--font-base);
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            color: var(--accent-cyan);
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover, a:focus {
            color: var(--text-primary);
            outline: none;
        }
        a:focus-visible {
            outline: 2px solid var(--accent-cyan);
            outline-offset: 3px;
            border-radius: 4px;
        }

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

        button, .btn {
            transition: all var(--transition-fast);
        }

        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }

        /* ========== HEADER / NAV ========== */
        .site-header {
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 12px 0;
            transition: all var(--transition-medium);
        }
        .site-header.scrolled {
            padding: 8px 0;
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.6);
            background: rgba(8, 9, 15, 0.98);
        }

        .navbar {
            padding: 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: nowrap;
            gap: 20px;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.02em;
            white-space: nowrap;
            text-decoration: none;
        }
        .navbar-brand i {
            color: var(--accent-cyan);
            font-size: 1.5rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }
        .navbar-brand:hover {
            color: var(--text-primary);
        }

        .navbar-nav {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-item {
            position: relative;
        }
        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 500;
            font-size: 0.95rem;
            padding: 10px 16px !important;
            border-radius: var(--radius-sm);
            transition: all var(--transition-fast);
            white-space: nowrap;
            text-decoration: none;
        }
        .nav-link:hover {
            color: var(--text-primary) !important;
            background: rgba(0, 82, 255, 0.15);
        }
        .nav-link.active {
            color: var(--accent-cyan) !important;
            background: rgba(0, 240, 255, 0.1);
            box-shadow: inset 0 0 0 1px rgba(0, 240, 255, 0.3);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 8px;
        }
        .btn-login {
            color: var(--text-primary);
            font-weight: 500;
            font-size: 0.9rem;
            padding: 9px 18px;
            border: 1px solid var(--border-color);
            border-radius: 50px;
            transition: all var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 10px 22px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-fast);
            text-decoration: none;
            white-space: nowrap;
        }
        .btn-signup:hover {
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 82, 255, 0.7);
        }

        .navbar-toggler {
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 8px 10px;
            background: transparent;
        }
        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.3);
            outline: none;
        }
        .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: 991.98px) {
            .navbar-collapse {
                background: var(--bg-secondary);
                border-radius: var(--radius-md);
                padding: 20px;
                margin-top: 12px;
                border: 1px solid var(--border-color);
                box-shadow: var(--shadow-card);
            }
            .navbar-nav {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                width: 100%;
            }
            .nav-item {
                width: 100%;
            }
            .nav-link {
                display: block;
                width: 100%;
                padding: 12px 16px !important;
            }
            .nav-auth {
                flex-direction: row;
                justify-content: center;
                margin: 12px 0 4px;
                width: 100%;
                gap: 12px;
            }
            .btn-login, .btn-signup {
                flex: 1;
                text-align: center;
                padding: 12px 16px;
            }
        }

        /* ========== PAGE BANNER ========== */
        .page-banner {
            position: relative;
            padding: 140px 0 70px;
            background: var(--bg-secondary);
            overflow: hidden;
            border-bottom: 1px solid var(--border-color);
        }
        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(0, 82, 255, 0.25) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: -15%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .page-banner .container {
            position: relative;
            z-index: 1;
        }
        .page-banner h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.03em;
            line-height: 1.2;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .page-banner h1 .highlight {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .page-banner .lead {
            font-size: 1.15rem;
            color: var(--text-secondary);
            max-width: 700px;
            line-height: 1.7;
        }
        .banner-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }
        .banner-breadcrumb a {
            color: var(--accent-cyan);
        }
        .banner-breadcrumb span {
            color:var(--text-muted);
        }

        /* ========== MAIN CONTENT ========== */
        .main-content {
            padding: 60px 0;
            background: var(--bg-primary);
        }

        .content-section {
            margin-bottom: 60px;
        }
        .content-section:last-child {
            margin-bottom: 0;
        }

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }
        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            box-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            margin-bottom: 16px;
            color: var(--text-primary);
            text-align: left;
        }
        .section-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 800px;
            text-align: left;
        }

        /* Download Cards */
        .download-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 10px;
        }
        .download-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            text-align: left;
            transition: all var(--transition-medium);
            position: relative;
            overflow: hidden;
        }
        .download-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-medium);
        }
        .download-card:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-glow);
            transform: translateY(-6px);
        }
        .download-card:hover::before {
            opacity: 1;
        }
        .download-card .card-icon {
            width: 56px;
            height: 56px;
            border-radius: var(--radius-md);
            background: rgba(0, 82, 255, 0.15);
            border: 1px solid rgba(0, 82, 255, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            font-size: 1.5rem;
            color: var(--accent-cyan);
        }
        .download-card h3 {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }
        .download-card p {
            font-size: 0.95rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 20px;
            flex-grow: 1;
        }
        .download-card .btn-download {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #FFFFFF;
            font-weight: 700;
            font-size: 0.9rem;
            padding: 12px 20px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 4px 15px rgba(0, 82, 255, 0.4);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .download-card .btn-download:hover {
            color: #FFFFFF;
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(0, 82, 255, 0.7);
        }
        .download-card .card-badge {
            position: absolute;
            top: 20px;
            right: 20px;
            background: rgba(0, 240, 255, 0.15);
            color: var(--accent-cyan);
            font-size: 0.7rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 50px;
            border: 1px solid rgba(0, 240, 255, 0.3);
            letter-spacing: 0.05em;
        }

        /* Feature List */
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 0;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            padding: 16px 18px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            transition: all var(--transition-fast);
        }
        .feature-list li:hover {
            border-color: var(--accent-blue);
            box-shadow: var(--shadow-glow);
        }
        .feature-list li i {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            margin-top: 3px;
            flex-shrink: 0;
        }

        /* Steps */
        .steps-container {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 10px;
        }
        .step-item {
            position: relative;
            padding: 24px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            transition: all var(--transition-medium);
        }
        .step-item:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-4px);
        }
        .step-number {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            opacity: 0.3;
            line-height: 1;
            margin-bottom: 12px;
            letter-spacing: -0.03em;
        }
        .step-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .step-item p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* FAQ */
        .faq-section {
            margin-top: 20px;
        }
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md) !important;
            margin-bottom: 14px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }
        .accordion-item:hover {
            border-color: var(--accent-blue);
        }
        .accordion-button {
            background: transparent !important;
            color: var(--text-primary) !important;
            font-weight: 600;
            font-size: 1rem;
            padding: 18px 22px;
            box-shadow: none !important;
            border-radius: var(--radius-md) !important;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(0, 82, 255, 0.1) !important;
            color: var(--accent-cyan) !important;
        }
        .accordion-button::after {
            background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none' stroke='%2300F0FF' stroke-linecap='round' stroke-linejoin='round'%3e%3cpath d='M2 5L8 11L14 5'/%3e%3c/svg%3e");
        }
        .accordion-button:focus {
            box-shadow: 0 0 0 3px rgba(0, 240, 255, 0.2) !important;
            outline: none;
        }
        .accordion-body {
            color: var(--text-secondary);
            font-size: 0.95rem;
            line-height: 1.7;
            padding: 4px 22px 20px;
        }

        /* CTA */
        .cta-section {
            background: var(--bg-secondary);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            text-align: left;
            position: relative;
            overflow: hidden;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(0, 240, 255, 0.15) 0%, transparent 70%);
            border-radius: 50%;
            pointer-events: none;
        }
        .cta-section h2 {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
            letter-spacing: -0.02em;
        }
        .cta-section p {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 650px;
            line-height: 1.7;
        }
        .btn-cta {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #FFFFFF;
            font-weight: 700;
            font-size: 1rem;
            padding: 14px 32px;
            border-radius: 50px;
            border: none;
            box-shadow: 0 4px 20px rgba(0, 82, 255, 0.5);
            transition: all var(--transition-fast);
            text-decoration: none;
        }
        .btn-cta:hover {
            color: #FFFFFF;
            transform: translateY(-3px);
            box-shadow: 0 10px 35px rgba(0, 82, 255, 0.8);
        }

        /* ========== FAB ========== */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(8,9,15,0.7), rgba(8,9,15,0.7)), linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.4rem;
            cursor: pointer;
            opacity: 0.6;
            box-shadow: var(--shadow-cyan-glow);
            transition: all var(--transition-fast);
            animation: fab-breathe 3s ease-in-out infinite;
        }
        .fab-left:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.8);
            color: #FFFFFF;
        }
        .fab-left:active {
            transform: scale(0.95);
        }
        .fab-left .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            border: 2px solid var(--bg-primary);
            animation: blink-dot 1.5s ease-in-out infinite;
        }

        @keyframes fab-breathe {
            0%, 100% { opacity: 0.6; }
            50% { opacity: 0.85; }
        }
        @keyframes blink-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.3; }
        }

        /* ========== FOOTER ========== */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-color);
            padding: 60px 0 30px;
            color: var(--text-secondary);
        }
        .footer-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }
        .footer-brand i {
            color: var(--accent-cyan);
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }
        .site-footer p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 16px;
        }
        .site-footer h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: -0.01em;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul li a {
            color: var(--text-muted);
            font-size: 0.9rem;
            transition: color var(--transition-fast);
            text-decoration: none;
        }
        .site-footer ul li a:hover {
            color: var(--accent-cyan);
        }
        .badge-18 {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: #D32F2F;
            color: #FFFFFF;
            font-weight: 800;
            font-size: 0.75rem;
            border: 2px solid rgba(255, 255, 255, 0.3);
            margin-right: 8px;
        }
        .pay-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50px;
            padding: 8px 14px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
        }
        .pay-badge:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid var(--border-color);
            margin-top: 40px;
            padding-top: 24px;
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: flex-start;
        }
        .footer-bottom p {
            margin: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
        }
        .payment-icons {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        /* ========== RESPONSIVE ========== */
        @media (max-width: 1024px) {
            .download-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-container {
                grid-template-columns: repeat(2, 1fr);
            }
            .page-banner h1 {
                font-size: 2.4rem;
            }
        }

        @media (max-width: 768px) {
            .page-banner {
                padding: 120px 0 50px;
            }
            .page-banner h1 {
                font-size: 2rem;
            }
            .page-banner .lead {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .download-grid {
                grid-template-columns: 1fr;
            }
            .feature-list {
                grid-template-columns: 1fr;
            }
            .steps-container {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 32px 24px;
            }
            .cta-section h2 {
                font-size: 1.5rem;
            }
            .main-content {
                padding: 40px 0;
            }
            .site-footer {
                padding: 40px 0 20px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
            .page-banner h1 {
                font-size: 1.7rem;
            }
            .navbar-brand {
                font-size: 1.1rem;
            }
            .navbar-brand i {
                font-size: 1.2rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            .btn-cta {
                width: 100%;
                justify-content: center;
            }
            .download-card {
                padding: 24px 18px;
            }
            .fab-left {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
                left: 12px;
                bottom: 80px;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A2E1C;
            --bg-secondary: #123E25;
            --bg-card: #0F3521;
            --bg-card-hover: #17492E;
            --accent-gold: #FFD700;
            --accent-gold-soft: #FFC107;
            --accent-red: #D32F2F;
            --accent-red-hover: #B71C1C;
            --text-primary: #FFFFFF;
            --text-secondary: #D1F2EB;
            --text-muted: #9BB8AA;
            --border-gold: rgba(255, 215, 0, 0.4);
            --border-gold-strong: rgba(255, 215, 0, 0.7);
            --shadow-card: 0 8px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 16px 40px rgba(0, 0, 0, 0.5), 0 0 20px rgba(255, 215, 0, 0.15);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --font-family: 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-fast: all 0.2s ease;
        }

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

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

        body {
            font-family: var(--font-family);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            overflow-x: hidden;
            position: relative;
            min-height: 100vh;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(ellipse at top left, rgba(255, 215, 0, 0.05) 0%, transparent 50%),
                        radial-gradient(ellipse at bottom right, rgba(18, 62, 37, 0.8) 0%, transparent 60%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            position: relative;
            z-index: 1;
            max-width: 1200px;
            padding-left: 20px;
            padding-right: 20px;
        }

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

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

        a:focus-visible,
        button:focus-visible,
        .btn:focus-visible {
            outline: 2px solid var(--accent-gold);
            outline-offset: 2px;
            border-radius: 4px;
        }

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

        /* ===== HEADER / NAV ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(10, 46, 28, 0.92);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
            transition: var(--transition);
            padding: 0;
        }

        .site-header .container {
            padding-top: 10px;
            padding-bottom: 10px;
        }

        .navbar {
            padding: 0;
        }

        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--accent-gold) !important;
            letter-spacing: 0.5px;
            transition: var(--transition-fast);
        }

        .navbar-brand i {
            font-size: 1.6rem;
            color: var(--accent-gold);
            filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.6));
        }

        .navbar-brand span {
            background: linear-gradient(135deg, #FFD700 0%, #FFC107 40%, #FFD700 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .navbar-brand:hover {
            transform: translateY(-1px);
        }

        .navbar-nav {
            gap: 8px;
        }

        .nav-link {
            color: var(--text-secondary) !important;
            font-weight: 600;
            font-size: 0.95rem;
            padding: 8px 14px !important;
            border-radius: 6px;
            transition: var(--transition-fast);
            position: relative;
        }

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

        .nav-link.active {
            color: var(--accent-gold) !important;
            background: rgba(255, 215, 0, 0.12);
        }

        .nav-link.active::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 2px;
            background: var(--accent-gold);
            border-radius: 2px;
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 16px;
        }

        .btn-login {
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 0.9rem;
            padding: 8px 16px;
            border: 1px solid rgba(255, 215, 0, 0.5);
            border-radius: 6px;
            transition: var(--transition-fast);
            background: transparent;
        }

        .btn-login:hover {
            background: rgba(255, 215, 0, 0.1);
            border-color: var(--accent-gold);
            color: var(--accent-gold);
            transform: translateY(-1px);
        }

        .btn-signup {
            background: linear-gradient(135deg, #FFD700 0%, #FFC107 50%, #FFD700 100%);
            color: #0A2E1C;
            font-weight: 800;
            font-size: 0.9rem;
            padding: 9px 20px;
            border: none;
            border-radius: 6px;
            transition: var(--transition-fast);
            box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(255, 215, 0, 0.45);
            color: #0A2E1C;
        }

        .navbar-toggler {
            border: 1px solid rgba(255, 215, 0, 0.4);
            padding: 6px 10px;
            background: rgba(255, 215, 0, 0.1);
        }

        .navbar-toggler:focus {
            box-shadow: 0 0 0 3px rgba(255, 215, 0, 0.2);
        }

        .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%28255, 215, 0, 0.8%29' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* ===== BREADCRUMB ===== */
        .breadcrumb-wrapper {
            padding-top: 100px;
            padding-bottom: 20px;
        }

        .breadcrumb {
            margin: 0;
            font-size: 0.85rem;
            color: var(--text-muted);
            background: transparent;
        }

        .breadcrumb a {
            color: var(--text-muted);
            transition: var(--transition-fast);
        }

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

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

        /* ===== ARTICLE CONTENT ===== */
        .article-wrapper {
            padding: 20px 0 60px;
        }

        .article-container {
            max-width: 860px;
            margin: 0 auto;
        }

        .article-header {
            margin-bottom: 40px;
            padding-bottom: 30px;
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
        }

        .article-category-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(255, 215, 0, 0.12);
            color: var(--accent-gold);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 6px 14px;
            border-radius: 20px;
            margin-bottom: 16px;
            border: 1px solid rgba(255, 215, 0, 0.3);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .article-header h1 {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 16px;
            color: var(--text-primary);
            letter-spacing: 0.3px;
        }

        .article-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        .article-meta i {
            color: var(--accent-gold);
            margin-right: 5px;
        }

        .article-cover {
            border-radius: var(--radius-lg);
            overflow: hidden;
            margin-bottom: 40px;
            border: 1px solid rgba(255, 215, 0, 0.25);
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .article-cover img {
            width: 100%;
            height: 380px;
            object-fit: cover;
            transition: var(--transition);
        }

        .article-cover:hover img {
            transform: scale(1.02);
        }

        .article-body {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.8;
        }

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-primary);
            margin: 35px 0 16px;
            padding-bottom: 10px;
            border-bottom: 2px solid rgba(255, 215, 0, 0.3);
            line-height: 1.4;
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--accent-gold);
            margin: 28px 0 12px;
            line-height: 1.4;
        }

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

        .article-body ul,
        .article-body ol {
            margin-bottom: 20px;
            padding-left: 24px;
        }

        .article-body li {
            margin-bottom: 10px;
            position: relative;
        }

        .article-body ul li::marker {
            color: var(--accent-gold);
        }

        .article-body strong {
            color: var(--accent-gold);
            font-weight: 700;
        }

        .article-body blockquote {
            background: rgba(255, 215, 0, 0.06);
            border-left: 4px solid var(--accent-gold);
            padding: 20px 24px;
            margin: 24px 0;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            font-style: italic;
            color: var(--text-primary);
        }

        .article-body img {
            border-radius: var(--radius-md);
            margin: 20px 0;
            border: 1px solid rgba(255, 215, 0, 0.2);
        }

        .article-body a {
            color: var(--accent-gold);
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-body a:hover {
            color: var(--accent-gold-soft);
        }

        .article-body table {
            width: 100%;
            margin: 20px 0;
            border-collapse: collapse;
            background: rgba(255, 255, 255, 0.03);
            border-radius: var(--radius-md);
            overflow: hidden;
        }

        .article-body table th,
        .article-body table td {
            padding: 12px 16px;
            border: 1px solid rgba(255, 215, 0, 0.2);
            text-align: left;
        }

        .article-body table th {
            background: rgba(255, 215, 0, 0.1);
            color: var(--accent-gold);
            font-weight: 700;
        }

        /* CTA in article */
        .article-cta {
            background: linear-gradient(135deg, rgba(18, 62, 37, 0.95) 0%, rgba(10, 46, 28, 0.98) 100%);
            border: 1px solid rgba(255, 215, 0, 0.4);
            border-radius: var(--radius-lg);
            padding: 32px;
            margin: 40px 0;
            text-align: center;
            box-shadow: var(--shadow-card);
            position: relative;
            overflow: hidden;
        }

        .article-cta::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle, rgba(255, 215, 0, 0.1) 0%, transparent 60%);
            pointer-events: none;
        }

        .article-cta h3 {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 10px;
        }

        .article-cta p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .article-cta .btn-gold {
            display: inline-block;
            background: linear-gradient(135deg, #FFD700 0%, #FFC107 50%, #FFD700 100%);
            color: #0A2E1C;
            font-weight: 800;
            padding: 12px 32px;
            border-radius: 8px;
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            box-shadow: 0 6px 16px rgba(255, 215, 0, 0.35);
            transition: var(--transition-fast);
            border: none;
        }

        .article-cta .btn-gold:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(255, 215, 0, 0.5);
            color: #0A2E1C;
        }

        /* Article not found */
        .article-not-found {
            text-align: center;
            padding: 80px 20px;
            background: rgba(255, 255, 255, 0.02);
            border-radius: var(--radius-lg);
            border: 1px dashed rgba(255, 215, 0, 0.3);
        }

        .article-not-found i {
            font-size: 3rem;
            color: var(--accent-gold);
            margin-bottom: 20px;
            display: block;
        }

        .article-not-found h2 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }

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

        /* ===== RELATED SECTION ===== */
        .related-section {
            padding: 40px 0 60px;
            background: rgba(18, 62, 37, 0.3);
        }

        .related-section h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 24px;
            text-align: left;
        }

        .related-card {
            background: var(--bg-card);
            border: 1px solid rgba(255, 215, 0, 0.2);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: block;
        }

        .related-card:hover {
            border-color: rgba(255, 215, 0, 0.5);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }

        .related-card img {
            width: 100%;
            height: 160px;
            object-fit: cover;
            border-bottom: 1px solid rgba(255, 215, 0, 0.2);
        }

        .related-card-body {
            padding: 16px 18px;
        }

        .related-card-body h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .related-card-body p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin: 0;
        }

        /* ===== FOOTER ===== */
        .site-footer {
            background: #082416;
            border-top: 1px solid rgba(255, 215, 0, 0.25);
            padding: 60px 0 0;
            position: relative;
            z-index: 1;
        }

        .site-footer h5 {
            color: var(--accent-gold);
            font-weight: 700;
            font-size: 1rem;
            margin-bottom: 16px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

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

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

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

        .site-footer ul li a:hover {
            color: var(--accent-gold);
            padding-left: 4px;
        }

        .footer-brand {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-gold);
            margin-bottom: 16px;
            display: flex;
            align-items: center;
        }

        .footer-brand i {
            color: var(--accent-gold);
            filter: drop-shadow(0 0 6px rgba(255, 215, 0, 0.5));
        }

        .site-footer p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.7;
        }

        .badge-18 {
            display: inline-block;
            background: var(--accent-red);
            color: white;
            font-weight: 800;
            font-size: 0.75rem;
            padding: 4px 8px;
            border-radius: 4px;
            margin-right: 8px;
            letter-spacing: 1px;
        }

        .pay-badge {
            display: inline-block;
            background: rgba(255, 255, 255, 0.08);
            color: var(--text-secondary);
            font-size: 0.75rem;
            font-weight: 600;
            padding: 6px 12px;
            border-radius: 4px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            transition: var(--transition-fast);
        }

        .pay-badge:hover {
            background: rgba(255, 215, 0, 0.15);
            border-color: rgba(255, 215, 0, 0.4);
            color: var(--accent-gold);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 215, 0, 0.15);
            padding: 20px 0;
            margin-top: 40px;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 0.8rem;
            margin: 0;
        }

        .payment-icons {
            display: flex;
            gap: 8px;
            justify-content: center;
            margin-top: 12px;
            flex-wrap: wrap;
        }

        /* ===== FAB ===== */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 100px;
            z-index: 1000;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: linear-gradient(135deg, #0A2E1C 0%, #123E25 50%, #0A2E1C 100%);
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.3);
            opacity: 0.7;
            animation: fabBreathing 3s ease-in-out infinite;
            text-decoration: none;
        }

        .fab-support i {
            font-size: 1.5rem;
            color: var(--accent-gold);
            transition: var(--transition-fast);
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 8px 28px rgba(255, 215, 0, 0.5);
        }

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

        .fab-support:active {
            transform: scale(0.95) translateY(2px);
        }

        .fab-support .notification-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #D32F2F;
            border-radius: 50%;
            border: 2px solid #0A2E1C;
            animation: dotBlink 2s ease-in-out infinite;
        }

        @keyframes fabBreathing {
            0%, 100% { opacity: 0.7; }
            50% { opacity: 0.9; }
        }

        @keyframes dotBlink {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(1.2); }
        }

        /* ===== RESPONSIVE ===== */
        @media (max-width: 991px) {
            .navbar-collapse {
                background: rgba(10, 46, 28, 0.98);
                border-radius: var(--radius-md);
                padding: 16px;
                margin-top: 10px;
                border: 1px solid rgba(255, 215, 0, 0.3);
            }

            .nav-auth {
                margin-left: 0;
                margin-top: 12px;
                padding-top: 12px;
                border-top: 1px solid rgba(255, 215, 0, 0.2);
                justify-content: flex-start;
            }

            .navbar-nav {
                gap: 4px;
            }

            .article-header h1 {
                font-size: 1.7rem;
            }

            .article-cover img {
                height: 250px;
            }
        }

        @media (max-width: 768px) {
            .breadcrumb-wrapper {
                padding-top: 85px;
            }

            .article-header h1 {
                font-size: 1.5rem;
            }

            .article-body {
                font-size: 1rem;
            }

            .article-body h2 {
                font-size: 1.35rem;
            }

            .article-cover img {
                height: 200px;
            }

            .article-cta {
                padding: 24px 20px;
            }

            .article-cta h3 {
                font-size: 1.2rem;
            }

            .site-footer {
                padding: 40px 0 0;
            }

            .fab-support {
                left: 16px;
                bottom: 80px;
                width: 50px;
                height: 50px;
            }
        }

        @media (max-width: 520px) {
            .navbar-brand {
                font-size: 1.1rem;
            }

            .navbar-brand i {
                font-size: 1.3rem;
            }

            .article-header h1 {
                font-size: 1.3rem;
            }

            .article-meta {
                font-size: 0.75rem;
                gap: 10px;
            }

            .article-cover img {
                height: 170px;
            }

            .article-body h2 {
                font-size: 1.2rem;
            }

            .article-body h3 {
                font-size: 1.1rem;
            }

            .article-cta h3 {
                font-size: 1.1rem;
            }

            .article-cta .btn-gold {
                padding: 10px 24px;
                font-size: 0.9rem;
            }

            .related-card img {
                height: 130px;
            }

            .fab-support {
                left: 12px;
                bottom: 70px;
                width: 44px;
                height: 44px;
            }

            .fab-support i {
                font-size: 1.2rem;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #121212;
            --bg-secondary: #1C1C1E;
            --bg-card: #1E1E22;
            --accent-gold: #C5A059;
            --accent-bright: #FFBF00;
            --accent-amber: #D4AC0D;
            --text-white: #F5F5F7;
            --text-muted: #A6A6B0;
            --text-gold: #D4AC0D;
            --border-gold: rgba(197, 160, 89, 0.4);
            --shadow-soft: 0 10px 30px rgba(0,0,0,0.5);
            --shadow-gold: 0 4px 20px rgba(197,160,89,0.25);
            --radius-sm: 10px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --radius-xl: 32px;
            --font-sans: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
            --transition-base: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-white);
            line-height: 1.65;
            font-size: 1rem;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
        }
        h1, h2, h3, h4, h5, h6 {
            font-weight: 700;
            letter-spacing: -0.02em;
            line-height: 1.25;
            color: var(--text-white);
        }
        a {
            color: var(--accent-gold);
            text-decoration: none;
            transition: var(--transition-base);
        }
        a:hover {
            color: var(--accent-bright);
        }
        img {
            max-width: 100%;
            display: block;
            height: auto;
        }
        .container {
            max-width: 1200px;
            padding-left: 24px;
            padding-right: 24px;
        }
        .section {
            padding: 5rem 0;
        }
        .section-alt {
            background-color: var(--bg-secondary);
        }
        .section-heading {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 1rem;
            letter-spacing: -0.03em;
        }
        .section-sub {
            color: var(--text-muted);
            font-size: 1.1rem;
            max-width: 720px;
            margin-bottom: 2.5rem;
        }
        .text-gold {
            color: var(--accent-gold);
        }
        .bg-dark-soft {
            background: var(--bg-secondary);
        }
        .divider {
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--border-gold), transparent);
            margin: 3rem 0;
            opacity: 0.6;
        }
        .btn {
            border-radius: 50px;
            padding: 0.75rem 1.8rem;
            font-weight: 600;
            letter-spacing: 0.01em;
            transition: var(--transition-base);
            border: none;
        }
        .btn-gold {
            background: linear-gradient(135deg, var(--accent-bright), var(--accent-gold));
            color: #121212;
            box-shadow: 0 8px 18px rgba(197,160,89,0.3);
        }
        .btn-gold:hover, .btn-gold:focus {
            background: linear-gradient(135deg, #FFD966, #D4AC0D);
            color: #000;
            transform: translateY(-2px);
            box-shadow: 0 12px 24px rgba(197,160,89,0.45);
        }
        .btn-outline-gold {
            background: transparent;
            color: var(--accent-gold);
            border: 1px solid var(--border-gold);
        }
        .btn-outline-gold:hover, .btn-outline-gold:focus {
            background: rgba(197,160,89,0.1);
            color: var(--accent-bright);
            border-color: var(--accent-bright);
        }
        .badge-gold {
            background: rgba(197,160,89,0.15);
            color: var(--accent-bright);
            border: 1px solid var(--border-gold);
            padding: 0.35rem 1rem;
            border-radius: 30px;
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.03em;
            text-transform: uppercase;
        }
        .card-custom {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-soft);
            transition: var(--transition-base);
        }
        .card-custom:hover {
            border-color: var(--border-gold);
            transform: translateY(-6px);
            box-shadow: 0 20px 40px rgba(0,0,0,0.6);
        }
        .icon-circle {
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(197,160,89,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.6rem;
            flex-shrink: 0;
        }
        .step-number {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: var(--accent-gold);
            color: #121212;
            font-weight: 800;
            font-size: 1.1rem;
            margin-right: 12px;
        }

        /* Header */
        .site-header {
            background: rgba(18, 18, 18, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(197,160,89,0.2);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        .navbar-brand {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.4rem;
            color: var(--text-white);
        }
        .navbar-brand i {
            color: var(--accent-gold);
            font-size: 1.6rem;
        }
        .navbar-brand span {
            background: linear-gradient(135deg, #F5F5F7, #D4AC0D);
            -webkit-background-clip: text;
            background-clip: text;
            -webkit-text-fill-color: transparent;
        }
        .navbar-nav .nav-link {
            color: var(--text-muted);
            font-weight: 500;
            padding: 0.75rem 1.1rem;
            border-radius: 30px;
            transition: var(--transition-base);
        }
        .navbar-nav .nav-link:hover {
            color: var(--accent-bright);
        }
        .navbar-nav .nav-link.active {
            color: var(--accent-gold);
            background: rgba(197,160,89,0.1);
        }
        .nav-auth {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: 1.5rem;
        }
        .btn-login {
            color: var(--text-white);
            font-weight: 600;
            padding: 0.5rem 1.2rem;
            border-radius: 30px;
            transition: var(--transition-base);
        }
        .btn-login:hover {
            color: var(--accent-gold);
        }
        .btn-signup {
            background: linear-gradient(135deg, var(--accent-bright), var(--accent-gold));
            color: #121212;
            font-weight: 700;
            padding: 0.6rem 1.6rem;
            border-radius: 30px;
            transition: var(--transition-base);
        }
        .btn-signup:hover {
            background: linear-gradient(135deg, #FFD966, #D4AC0D);
            transform: translateY(-2px);
            color: #000;
            box-shadow: 0 8px 18px rgba(197,160,89,0.4);
        }
        .navbar-toggler {
            border: 1px solid var(--border-gold);
            padding: 0.3rem 0.7rem;
        }
        .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='%23C5A059' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
        }

        /* Hero */
        .hero-category {
            background: radial-gradient(circle at 20% 20%, rgba(197,160,89,0.08), transparent 60%), var(--bg-primary);
            padding: 4rem 0 3.5rem;
            border-bottom: 1px solid rgba(197,160,89,0.15);
        }
        .hero-category h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.04em;
            margin-bottom: 1rem;
        }
        .hero-category .lead {
            font-size: 1.2rem;
            color: var(--text-muted);
            max-width: 780px;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(197,160,89,0.1);
            border: 1px solid var(--border-gold);
            border-radius: 30px;
            padding: 0.3rem 1.2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-gold);
            margin-bottom: 1.5rem;
        }
        .hero-badge i {
            font-size: 1rem;
        }

        /* Feature blocks */
        .feature-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 1.5rem;
        }
        .feature-item {
            display: flex;
            gap: 1rem;
            align-items: flex-start;
        }
        .feature-item h5 {
            font-size: 1.1rem;
            margin-bottom: 0.3rem;
        }
        .feature-item p {
            color: var(--text-muted);
            margin-bottom: 0;
            font-size: 0.95rem;
        }

        /* Device Cards */
        .device-card {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-md);
            padding: 1.8rem 1.5rem;
            height: 100%;
            transition: var(--transition-base);
        }
        .device-card:hover {
            border-color: var(--border-gold);
            box-shadow: var(--shadow-gold);
        }
        .device-icon {
            font-size: 2.4rem;
            color: var(--accent-gold);
            margin-bottom: 1rem;
        }
        .device-card h3 {
            font-size: 1.4rem;
            margin-bottom: 0.8rem;
        }
        .device-card ul {
            list-style: none;
            padding-left: 0;
        }
        .device-card ul li {
            padding-left: 1.6rem;
            position: relative;
            margin-bottom: 0.6rem;
            color: var(--text-muted);
        }
        .device-card ul li::before {
            content: '\f00c';
            font-family: 'Font Awesome 6 Free';
            font-weight: 900;
            position: absolute;
            left: 0;
            color: var(--accent-gold);
            font-size: 0.85rem;
        }

        /* Steps */
        .step-flow {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 1.2rem;
        }
        .step-item .step-number {
            flex-shrink: 0;
        }
        .step-item p {
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .step-item h4 {
            font-size: 1.15rem;
            margin-bottom: 0.2rem;
        }

        /* FAQ */
        .accordion-item {
            background: var(--bg-card);
            border: 1px solid rgba(255,255,255,0.06);
            border-radius: var(--radius-sm);
            margin-bottom: 0.8rem;
            overflow: hidden;
        }
        .accordion-button {
            background: transparent;
            color: var(--text-white);
            font-weight: 600;
            padding: 1.2rem 1.5rem;
            box-shadow: none;
        }
        .accordion-button:not(.collapsed) {
            background: rgba(197,160,89,0.08);
            color: var(--accent-gold);
            box-shadow: none;
        }
        .accordion-button:focus {
            box-shadow: none;
            border-color: var(--border-gold);
        }
        .accordion-button::after {
            filter: brightness(0) invert(0.8);
        }
        .accordion-body {
            color: var(--text-muted);
            padding: 0 1.5rem 1.5rem;
        }

        /* CTA */
        .cta-banner {
            background: linear-gradient(135deg, rgba(197,160,89,0.15), rgba(18,18,18,0.95)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            border: 1px solid var(--border-gold);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-banner h2 {
            font-size: 2rem;
            margin-bottom: 1rem;
        }
        .cta-banner p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto 1.5rem;
        }

        /* Footer */
        .site-footer {
            background: #0A0A0A;
            border-top: 1px solid rgba(197,160,89,0.15);
            padding: 4rem 0 2rem;
            margin-top: 2rem;
        }
        .footer-brand {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 1rem;
        }
        .footer-brand i {
            color: var(--accent-gold);
        }
        .site-footer p {
            color: var(--text-muted);
            font-size: 0.95rem;
        }
        .site-footer h5 {
            font-size: 1rem;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-gold);
            margin-bottom: 1rem;
        }
        .site-footer ul {
            list-style: none;
            padding-left: 0;
        }
        .site-footer ul li {
            margin-bottom: 0.6rem;
        }
        .site-footer ul a {
            color: var(--text-muted);
            transition: var(--transition-base);
        }
        .site-footer ul a:hover {
            color: var(--accent-bright);
            padding-left: 4px;
        }
        .pay-badge {
            background: rgba(255,255,255,0.06);
            color: var(--text-white);
            border: 1px solid rgba(197,160,89,0.3);
            border-radius: 30px;
            padding: 0.35rem 1rem;
            font-size: 0.8rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }
        .badge-18 {
            background: #D32F2F;
            color: #fff;
            font-weight: 800;
            border-radius: 8px;
            padding: 0.2rem 0.6rem;
            display: inline-block;
            margin-right: 6px;
            font-size: 0.8rem;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.08);
            margin-top: 2.5rem;
            padding-top: 1.5rem;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1rem;
        }
        .footer-bottom p {
            margin-bottom: 0;
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-custom {
            position: fixed;
            left: 1.5rem;
            bottom: 6rem;
            z-index: 1050;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: #1C1C1E;
            border: 2px solid var(--accent-gold);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-gold);
            font-size: 1.8rem;
            box-shadow: 0 4px 20px rgba(197,160,89,0.3);
            transition: var(--transition-base);
            opacity: 0.7;
            animation: floatFAB 3s ease-in-out infinite;
        }
        .fab-custom:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 25px rgba(197,160,89,0.6);
            color: var(--accent-bright);
        }
        @keyframes floatFAB {
            0%, 100% { transform: translateY(0); }
            50% { transform: translateY(-8px); }
        }

        /* Responsive */
        @media (max-width: 992px) {
            .hero-category h1 { font-size: 2.2rem; }
            .section { padding: 3.5rem 0; }
            .nav-auth { margin-left: 0; margin-top: 1rem; }
        }
        @media (max-width: 768px) {
            .container { padding-left: 16px; padding-right: 16px; }
            .hero-category { padding: 2.5rem 0; }
            .hero-category h1 { font-size: 1.8rem; }
            .section-heading { font-size: 1.7rem; }
            .device-card { padding: 1.5rem 1rem; }
            .cta-banner { padding: 2.5rem 1.5rem; }
            .fab-custom { width: 52px; height: 52px; font-size: 1.5rem; left: 1rem; bottom: 5rem; }
        }
        @media (max-width: 576px) {
            .navbar-brand { font-size: 1.1rem; }
            .hero-category h1 { font-size: 1.6rem; }
            .btn { padding: 0.6rem 1.4rem; font-size: 0.9rem; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }