/* roulang page: index */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

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

        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }

        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }

        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255,69,0,0.3);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255,69,0,0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11,11,11,0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255,69,0,0.2);
            z-index: 999;
        }

        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        /* Hero Section - Application Style */
        .hero-section {
            padding: 140px 0 80px;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            position: relative;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(180deg, rgba(11,11,11,0.85) 0%, rgba(11,11,11,0.92) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 50px;
        }

        .hero-text {
            flex: 1 1 500px;
        }

        .hero-badges {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            margin-bottom: 24px;
        }

        .badge-item {
            background: rgba(255,69,0,0.12);
            border: 1px solid rgba(255,69,0,0.3);
            color: var(--accent-orange);
            padding: 10px 18px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .badge-item i {
            font-size: 1rem;
        }

        .hero-title {
            font-size: 3.2rem;
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 22px;
            color: #fff;
        }

        .hero-title span {
            color: var(--accent-orange);
        }

        .hero-desc {
            font-size: 1.1rem;
            color: var(--text-warm-gray);
            line-height: 1.7;
            margin-bottom: 32px;
            max-width: 620px;
        }

        .hero-cta-row {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            align-items: center;
        }

        .btn-apply {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 16px 36px;
            border-radius: var(--border-radius-md);
            font-weight: 800;
            font-size: 1.1rem;
            box-shadow: var(--shadow-orange);
            transition: all var(--transition-base);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .btn-apply:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 6px 30px rgba(255,69,0,0.5);
            transform: translateY(-2px);
        }

        .btn-apply-secondary {
            background: transparent;
            border: 2px solid rgba(255,255,255,0.25);
            color: #fff;
            padding: 14px 30px;
            border-radius: var(--border-radius-md);
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .btn-apply-secondary:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .hero-stats {
            display: flex;
            gap: 30px;
            margin-top: 28px;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-orange);
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .hero-visual {
            flex: 0 0 320px;
            background: rgba(22,22,22,0.8);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 30px;
            text-align: center;
            backdrop-filter: blur(10px);
        }

        .hero-visual img {
            border-radius: var(--border-radius-md);
            margin-bottom: 16px;
        }

        .hero-visual-badge {
            background: var(--badge-orange);
            color: #fff;
            display: inline-block;
            padding: 6px 16px;
            border-radius: 20px;
            font-weight: 700;
            font-size: 0.85rem;
        }

        /* Sections General */
        .section-block {
            padding: 70px 0;
        }

        .section-title {
            font-size: 2.3rem;
            font-weight: 800;
            margin-bottom: 16px;
            color: #fff;
            text-align: left;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 48px;
            text-align: left;
            max-width: 700px;
        }

        /* Group Buy Section */
        .group-buy-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .group-buy-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 32px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .group-buy-card:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
            transform: translateY(-4px);
        }

        .group-buy-step {
            font-size: 3rem;
            font-weight: 900;
            color: rgba(255,69,0,0.15);
            position: absolute;
            top: 10px;
            right: 20px;
        }

        .group-buy-title {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .group-buy-desc {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* Hot Deals */
        .hot-deals-scroll {
            display: flex;
            gap: 24px;
            overflow-x: auto;
            padding-bottom: 20px;
            scroll-snap-type: x mandatory;
        }

        .hot-deal-card {
            min-width: 280px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            overflow: hidden;
            scroll-snap-align: start;
            transition: all var(--transition-base);
        }

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

        .hot-deal-thumb {
            height: 180px;
            background-size: cover;
            background-position: center;
        }

        .hot-deal-info {
            padding: 20px;
        }

        .hot-deal-info h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .hot-deal-progress {
            width: 100%;
            height: 6px;
            background: #2A2A2A;
            border-radius: 3px;
            margin: 12px 0;
        }

        .hot-deal-progress-fill {
            height: 100%;
            background: var(--btn-primary-bg);
            border-radius: 3px;
        }

        .hot-deal-meta {
            display: flex;
            justify-content: space-between;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* CMS News Section */
        .news-layout {
            display: flex;
            gap: 40px;
            flex-wrap: wrap;
        }

        .news-list {
            flex: 2;
            min-width: 300px;
        }

        .news-item {
            display: flex;
            gap: 20px;
            padding: 20px 0;
            border-bottom: 1px solid var(--card-border);
            align-items: flex-start;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item-content h4 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }

        .news-item-content p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 8px;
        }

        .news-item-content .news-date {
            font-size: 0.8rem;
            color: var(--accent-orange);
        }

        .news-sidebar {
            flex: 1;
            min-width: 240px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 24px;
        }

        .news-sidebar h5 {
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--accent-orange);
        }

        /* Open Group Bar */
        .cta-bar {
            background: linear-gradient(135deg, #1C0A00, #2A0D00);
            border: 1px solid rgba(255,69,0,0.3);
            border-radius: var(--border-radius-lg);
            padding: 40px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
        }

        .cta-bar h3 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
        }

        .faq-item {
            border-bottom: 1px solid var(--card-border);
            padding: 20px 0;
        }

        .faq-question {
            font-size: 1.1rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-answer {
            margin-top: 12px;
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.7;
            display: none;
        }

        .faq-item.open .faq-answer {
            display: block;
        }

        /* FAB */
        .fab-floating {
            position: fixed;
            left: 20px;
            bottom: 100px;
            width: 56px;
            height: 56px;
            background: var(--btn-primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.4rem;
            box-shadow: 0 0 20px rgba(255,69,0,0.5);
            z-index: 999;
            transition: all var(--transition-base);
            cursor: pointer;
        }

        .fab-floating:hover {
            transform: scale(1.1);
            box-shadow: 0 0 30px rgba(255,69,0,0.7);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            padding: 50px 0 30px;
            border-top: 2px solid var(--accent-orange);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
        }

        .footer-col h5 {
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--accent-orange);
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            margin-bottom: 10px;
            font-size: 0.9rem;
        }

        .footer-bottom {
            margin-top: 40px;
            text-align: center;
            color: var(--text-muted);
            font-size: 0.85rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.5rem; }
            .hero-visual { flex: 0 0 280px; }
        }

        @media (max-width: 768px) {
            .nav-links { display: none; }
            .nav-cta-group .btn-login,
            .nav-cta-group .btn-signup { display: inline-block; }
            .mobile-toggle { display: block; }
            .mobile-menu.active { display: flex; }
            .hero-content { flex-direction: column; }
            .hero-visual { max-width: 100%; }
            .hero-title { font-size: 2rem; }
            .section-title { font-size: 1.8rem; }
            .news-layout { flex-direction: column; }
            .cta-bar { text-align: center; justify-content: center; }
        }

/* roulang page: article */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

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

        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }

        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }

        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255,69,0,0.3);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255,69,0,0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11,11,11,0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255,69,0,0.2);
            z-index: 999;
        }

        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        .page-banner {
            margin-top: 64px;
            padding: 60px 0 40px;
            background: linear-gradient(135deg, #161616 0%, #0B0B0B 100%);
            border-bottom: 1px solid var(--card-border);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 500px;
            height: 500px;
            background: radial-gradient(circle, rgba(255,69,0,0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .banner-content {
            position: relative;
            z-index: 2;
            text-align: left;
            max-width: 800px;
        }

        .banner-badge {
            display: inline-block;
            background: var(--badge-orange);
            color: #fff;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.5px;
            margin-bottom: 16px;
        }

        .banner-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: var(--text-white);
            margin: 0 0 12px;
            line-height: 1.2;
        }

        .banner-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-top: 12px;
        }

        .banner-meta span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .banner-meta i {
            color: var(--accent-orange);
            font-size: 0.85rem;
        }

        .article-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 40px;
            padding: 50px 0 60px;
            align-items: start;
        }

        .article-main {
            min-width: 0;
        }

        .article-featured-image {
            width: 100%;
            border-radius: var(--border-radius-md);
            margin-bottom: 32px;
            border: 1px solid var(--card-border);
        }

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

        .article-body h2 {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 36px 0 16px;
            padding-bottom: 8px;
            border-bottom: 2px solid rgba(255,69,0,0.2);
        }

        .article-body h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 28px 0 12px;
        }

        .article-body p {
            margin: 0 0 18px;
        }

        .article-body ul, .article-body ol {
            margin: 0 0 20px;
            padding-left: 24px;
        }

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

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

        .article-body blockquote {
            border-left: 4px solid var(--accent-orange);
            background: rgba(255,69,0,0.05);
            padding: 18px 24px;
            border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
            margin: 24px 0;
            color: var(--text-white);
            font-style: italic;
        }

        .article-body img {
            border-radius: var(--border-radius-sm);
            margin: 20px 0;
        }

        .article-cta-box {
            background: linear-gradient(135deg, #1C1C1E, #252528);
            border: 1px solid rgba(255,69,0,0.3);
            border-radius: var(--border-radius-md);
            padding: 28px 32px;
            margin: 36px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            justify-content: space-between;
        }

        .article-cta-box p {
            margin: 0;
            font-weight: 700;
            font-size: 1.15rem;
            color: var(--text-white);
        }

        .article-cta-box .btn-cta {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 1rem;
            box-shadow: var(--shadow-orange);
            transition: all var(--transition-fast);
            white-space: nowrap;
        }

        .article-cta-box .btn-cta:hover {
            background: var(--btn-primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 28px rgba(255,69,0,0.45);
        }

        .article-sidebar {
            position: sticky;
            top: 84px;
        }

        .sidebar-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 24px;
            margin-bottom: 24px;
        }

        .sidebar-card h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin: 0 0 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(255,69,0,0.2);
        }

        .sidebar-card ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .sidebar-card ul li {
            margin-bottom: 12px;
        }

        .sidebar-card ul li a {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: color var(--transition-fast);
        }

        .sidebar-card ul li a:hover {
            color: var(--accent-orange);
        }

        .sidebar-card ul li a i {
            color: var(--accent-orange);
            font-size: 0.7rem;
        }

        .sidebar-promo {
            background: linear-gradient(135deg, #FF4500, #FF0000);
            border-radius: var(--border-radius-md);
            padding: 24px;
            text-align: center;
            color: #fff;
        }

        .sidebar-promo h4 {
            font-size: 1.2rem;
            font-weight: 800;
            margin: 0 0 8px;
        }

        .sidebar-promo p {
            font-size: 0.95rem;
            margin: 0 0 16px;
            opacity: 0.9;
        }

        .sidebar-promo .btn-sidebar-cta {
            background: #fff;
            color: #FF4500;
            padding: 10px 20px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            transition: all var(--transition-fast);
        }

        .sidebar-promo .btn-sidebar-cta:hover {
            background: #FFE0D0;
            transform: scale(1.03);
        }

        .not-found-section {
            padding: 80px 20px;
            text-align: center;
            min-height: 50vh;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
        }

        .not-found-section h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .not-found-section p {
            color: var(--text-muted);
            font-size: 1.1rem;
            margin-bottom: 24px;
        }

        .not-found-section .btn-back {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 12px 28px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            transition: all var(--transition-fast);
        }

        .not-found-section .btn-back:hover {
            background: var(--btn-primary-hover);
        }

        .site-footer {
            background: #0A0A0A;
            border-top: 1px solid rgba(255,69,0,0.2);
            padding: 50px 0 30px;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-col h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-orange);
            margin: 0 0 16px;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 10px;
            transition: color var(--transition-fast);
        }

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

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

        .footer-bottom p {
            margin: 0;
        }

        @media (max-width: 1024px) {
            .article-layout {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .article-sidebar {
                position: static;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-cta-group {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.active {
                display: flex;
            }
            .page-banner {
                padding: 40px 0 30px;
            }
            .banner-content h1 {
                font-size: 1.7rem;
            }
            .article-body {
                font-size: 1rem;
            }
            .article-cta-box {
                flex-direction: column;
                text-align: center;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .banner-content h1 {
                font-size: 1.5rem;
            }
            .banner-meta {
                flex-direction: column;
                gap: 8px;
            }
            .article-body h2 {
                font-size: 1.35rem;
            }
        }

/* roulang page: category1 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

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

        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }

        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }

        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255,69,0,0.3);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255,69,0,0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11,11,11,0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255,69,0,0.2);
            z-index: 999;
        }

        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        /* Page Hero */
        .page-hero {
            padding: 120px 0 60px;
            position: relative;
            background: linear-gradient(135deg, rgba(255,69,0,0.05) 0%, rgba(11,11,11,1) 100%);
        }

        .page-hero .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }

        .page-hero .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 20px;
            line-height: 1.2;
        }

        .page-hero .hero-text h1 span {
            color: var(--accent-orange);
            display: block;
        }

        .page-hero .hero-text .subtitle {
            font-size: 1.2rem;
            color: var(--text-warm-gray);
            margin-bottom: 30px;
        }

        .hero-visual {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 40px;
            text-align: left;
        }

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

        .ranking-preview li {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px solid var(--card-border);
            font-weight: 600;
        }

        .ranking-preview li:last-child {
            border-bottom: none;
        }

        .rank-badge {
            background: var(--accent-orange);
            color: #fff;
            width: 32px;
            height: 32px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-weight: 700;
            margin-right: 12px;
        }

        .rank-item {
            display: flex;
            align-items: center;
        }

        /* Section Styles */
        .section {
            padding: 60px 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-white);
        }

        .section-desc {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 700px;
        }

        /* Leaderboard Table */
        .leaderboard-table {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            overflow: hidden;
        }

        .leaderboard-header {
            display: grid;
            grid-template-columns: 60px 1fr 120px 100px 140px;
            padding: 16px 20px;
            background: rgba(255,69,0,0.1);
            font-weight: 700;
            font-size: 0.9rem;
            color: var(--accent-orange);
            border-bottom: 1px solid var(--card-border);
        }

        .leaderboard-row {
            display: grid;
            grid-template-columns: 60px 1fr 120px 100px 140px;
            padding: 16px 20px;
            align-items: center;
            border-bottom: 1px solid var(--card-border);
            transition: background var(--transition-fast);
        }

        .leaderboard-row:hover {
            background: rgba(255,69,0,0.05);
        }

        .leaderboard-row:last-child {
            border-bottom: none;
        }

        .pos-number {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-orange);
        }

        .game-info {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .game-thumb {
            width: 48px;
            height: 48px;
            border-radius: var(--border-radius-sm);
            object-fit: cover;
        }

        .rate-positive {
            color: #4CAF50;
            font-weight: 700;
        }

        .btn-detail {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 8px 16px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.85rem;
            transition: all var(--transition-fast);
        }

        .btn-detail:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 16px rgba(255,69,0,0.3);
        }

        /* Criteria Cards */
        .criteria-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 30px;
        }

        .criteria-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .criteria-card:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
        }

        .criteria-card .icon-circle {
            width: 48px;
            height: 48px;
            background: rgba(255,69,0,0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            color: var(--accent-orange);
            font-size: 1.4rem;
        }

        .criteria-card h4 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 8px;
        }

        /* Testimonials / Evidence */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 24px;
        }

        .testimonial-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 24px;
        }

        .testimonial-card .stars {
            color: var(--accent-orange);
            margin-bottom: 12px;
        }

        .testimonial-card .user-info {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 16px;
            font-weight: 600;
        }

        /* FAQ */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            margin-bottom: 16px;
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            color: var(--text-white);
            padding: 20px 24px;
            text-align: left;
            font-weight: 700;
            font-size: 1.1rem;
            display: flex;
            justify-content: space-between;
            align-items: center;
            border: none;
            transition: background var(--transition-fast);
        }

        .faq-question:hover {
            background: rgba(255,69,0,0.05);
        }

        .faq-answer {
            padding: 0 24px 20px;
            color: var(--text-muted);
            display: block;
        }

        /* CTA Section */
        .cta-section {
            background: linear-gradient(135deg, rgba(255,69,0,0.1), rgba(11,11,11,1));
            border: 1px solid rgba(255,69,0,0.25);
            border-radius: var(--border-radius-lg);
            padding: 50px 30px;
            text-align: left;
        }

        .cta-section h3 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-btn {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 1.1rem;
            display: inline-block;
            margin-top: 20px;
            transition: all var(--transition-fast);
        }

        .cta-btn:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 8px 30px rgba(255,69,0,0.4);
            transform: translateY(-2px);
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            padding: 60px 0 30px;
            margin-top: 60px;
            border-top: 1px solid rgba(255,69,0,0.15);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 30px;
            margin-bottom: 30px;
        }

        .footer-col h5 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }

        .footer-col a, .footer-col p {
            display: block;
            color: var(--text-muted);
            margin-bottom: 10px;
            font-size: 0.95rem;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid var(--card-border);
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 24px;
            z-index: 50;
            width: 56px;
            height: 56px;
            background: rgba(0,0,0,0.6);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            border-image: linear-gradient(135deg, #FF4500, #FF0000) 1;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-orange);
            box-shadow: 0 0 20px rgba(255,69,0,0.4);
            transition: all var(--transition-base);
            animation: neonPulse 2s infinite;
        }

        .fab-left:hover {
            box-shadow: 0 0 30px rgba(255,0,0,0.6);
            transform: scale(1.1);
        }

        @keyframes neonPulse {
            0%, 100% { box-shadow: 0 0 15px rgba(255,69,0,0.4); }
            50% { box-shadow: 0 0 25px rgba(255,0,0,0.7); }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .page-hero .hero-content {
                grid-template-columns: 1fr;
            }
            .leaderboard-header,
            .leaderboard-row {
                grid-template-columns: 50px 1fr 80px 80px 100px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 768px) {
            .desktop-nav {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.open {
                display: flex;
            }
            .page-hero {
                padding: 100px 0 40px;
            }
            .page-hero .hero-text h1 {
                font-size: 2rem;
            }
            .leaderboard-header,
            .leaderboard-row {
                grid-template-columns: 1fr;
                gap: 8px;
            }
            .leaderboard-header {
                display: none;
            }
            .leaderboard-row {
                padding: 16px;
            }
            .leaderboard-row::before {
                content: attr(data-label);
                font-weight: 700;
                color: var(--accent-orange);
                display: block;
                margin-bottom: 6px;
            }
            .section-title {
                font-size: 1.6rem;
            }
        }

/* roulang page: category2 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

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

        button,
        .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }

        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }

        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255, 69, 0, 0.3);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255, 69, 0, 0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
            border: none;
            cursor: pointer;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255, 69, 0, 0.2);
            z-index: 999;
        }

        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        .hero-section {
            position: relative;
            background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
            min-height: 480px;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            padding: 100px 20px 60px;
            margin-top: 64px;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(11, 11, 11, 0.8) 0%, rgba(11, 11, 11, 0.9) 100%);
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            width: 100%;
        }

        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
            text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
        }

        .hero-content h1 .highlight {
            color: var(--accent-orange);
        }

        .hero-subtitle {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 36px;
            line-height: 1.6;
        }

        .hero-search-wrap {
            position: relative;
            max-width: 620px;
            margin: 0 auto 24px;
        }

        .hero-search-wrap input {
            width: 100%;
            padding: 16px 56px 16px 24px;
            background: var(--card-bg);
            border: 2px solid var(--card-border);
            border-radius: 48px;
            font-size: 1rem;
            color: var(--text-white);
            outline: none;
            transition: all var(--transition-base);
        }

        .hero-search-wrap input:focus {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
        }

        .hero-search-wrap input::placeholder {
            color: var(--text-muted);
        }

        .hero-search-btn {
            position: absolute;
            right: 8px;
            top: 50%;
            transform: translateY(-50%);
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--btn-primary-bg);
            color: #fff;
            font-size: 1.2rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-fast);
            border: none;
        }

        .hero-search-btn:hover {
            background: var(--btn-primary-hover);
            box-shadow: var(--shadow-orange);
        }

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

        .hero-tags a {
            padding: 8px 20px;
            background: rgba(255, 69, 0, 0.15);
            border: 1px solid rgba(255, 69, 0, 0.3);
            border-radius: 24px;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--text-warm-gray);
            transition: all var(--transition-fast);
        }

        .hero-tags a:hover {
            background: rgba(255, 69, 0, 0.3);
            color: var(--accent-orange);
            border-color: var(--accent-orange);
        }

        .section-padding {
            padding: 70px 0;
        }

        .section-title {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 12px;
            color: var(--text-white);
            text-align: left;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-warm-gray);
            margin-bottom: 40px;
            line-height: 1.6;
            text-align: left;
        }

        .ranking-card-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 24px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 24px;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .rank-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 5px;
            height: 100%;
            background: var(--accent-orange);
            border-radius: 0 3px 3px 0;
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .rank-item:hover {
            border-color: rgba(255, 69, 0, 0.3);
            box-shadow: var(--shadow-orange);
            transform: translateY(-2px);
        }

        .rank-item:hover::before {
            opacity: 1;
        }

        .rank-badge {
            flex-shrink: 0;
            width: 64px;
            height: 64px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.6rem;
            font-weight: 900;
            color: #fff;
            position: relative;
        }

        .rank-1 {
            background: linear-gradient(135deg, #FFD700, #FF8C00);
            box-shadow: 0 4px 20px rgba(255, 215, 0, 0.4);
        }

        .rank-2 {
            background: linear-gradient(135deg, #C0C0C0, #9E9E9E);
            box-shadow: 0 4px 20px rgba(192, 192, 192, 0.3);
        }

        .rank-3 {
            background: linear-gradient(135deg, #CD7F32, #B87333);
            box-shadow: 0 4px 20px rgba(205, 127, 50, 0.3);
        }

        .rank-normal {
            background: var(--card-border);
            box-shadow: none;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }

        .rank-info h3 {
            font-size: 1.25rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 4px;
        }

        .rank-stats {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
            font-size: 0.9rem;
            color: var(--text-warm-gray);
            margin-top: 8px;
        }

        .rank-stats span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .rank-stats i {
            color: var(--accent-orange);
            font-size: 0.85rem;
        }

        .rank-score {
            flex-shrink: 0;
            text-align: center;
            padding: 0 16px;
        }

        .rank-score .score-num {
            font-size: 2rem;
            font-weight: 900;
            color: var(--accent-orange);
            line-height: 1;
        }

        .rank-score .score-label {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        .btn-rank-visit {
            flex-shrink: 0;
            padding: 10px 28px;
            background: var(--btn-primary-bg);
            color: #fff;
            font-weight: 700;
            border-radius: 24px;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            white-space: nowrap;
            border: none;
            cursor: pointer;
        }

        .btn-rank-visit:hover {
            background: var(--btn-primary-hover);
            box-shadow: var(--shadow-orange);
            transform: translateY(-2px);
        }

        .pain-points-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .pain-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .pain-item:hover {
            border-color: rgba(255, 69, 0, 0.3);
            box-shadow: var(--shadow-orange);
        }

        .pain-icon {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background: rgba(255, 69, 0, 0.2);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }

        .pain-item h4 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .pain-item p {
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            line-height: 1.6;
        }

        .testimonial-banner {
            background: linear-gradient(135deg, var(--card-bg), var(--secondary-bg));
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-lg);
            padding: 48px 36px;
            text-align: center;
            margin: 40px 0;
            position: relative;
        }

        .testimonial-banner::before {
            content: '\201C';
            position: absolute;
            top: -20px;
            left: 30px;
            font-size: 6rem;
            color: rgba(255, 69, 0, 0.15);
            font-family: serif;
            line-height: 1;
        }

        .quote-text {
            font-size: 1.3rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            line-height: 1.7;
            margin-bottom: 16px;
        }

        .quote-author {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-orange);
        }

        .value-props {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin: 40px 0;
        }

        .value-prop-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            transition: all var(--transition-base);
        }

        .value-prop-item:hover {
            border-color: rgba(255, 69, 0, 0.3);
            transform: translateY(-4px);
        }

        .value-prop-item .prop-icon {
            font-size: 2.2rem;
            color: var(--accent-orange);
            margin-bottom: 12px;
        }

        .value-prop-item h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }

        .value-prop-item p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 20px 24px;
            cursor: pointer;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(255, 69, 0, 0.3);
        }

        .faq-item summary {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-white);
            list-style: none;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary .faq-icon {
            font-size: 1.2rem;
            color: var(--accent-orange);
            transition: transform var(--transition-fast);
            flex-shrink: 0;
        }

        .faq-item[open] summary .faq-icon {
            transform: rotate(45deg);
        }

        .faq-answer {
            padding-top: 14px;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            line-height: 1.6;
        }

        .cta-banner {
            background: linear-gradient(135deg, #1a0a02, #1c1208);
            border: 2px solid rgba(255, 69, 0, 0.3);
            border-radius: var(--border-radius-lg);
            padding: 56px 36px;
            text-align: center;
            position: relative;
            overflow: hidden;
            margin: 40px 0;
        }

        .cta-banner h2 {
            font-size: 2rem;
            font-weight: 900;
            color: var(--text-white);
            margin-bottom: 12px;
        }

        .cta-banner p {
            font-size: 1.1rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
        }

        .btn-cta-large {
            display: inline-block;
            padding: 16px 48px;
            background: var(--btn-primary-bg);
            color: #fff;
            font-weight: 800;
            font-size: 1.1rem;
            border-radius: 48px;
            box-shadow: var(--shadow-orange);
            transition: all var(--transition-base);
            border: none;
        }

        .btn-cta-large:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 6px 30px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid rgba(255, 69, 0, 0.2);
            padding: 48px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-bottom: 32px;
        }

        .footer-col h5 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--accent-orange);
            margin-bottom: 16px;
        }

        .footer-col a,
        .footer-col p {
            display: block;
            font-size: 0.9rem;
            color: var(--text-warm-gray);
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-orange), var(--accent-fire-red));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(255, 69, 0, 0.5);
            transition: all var(--transition-base);
            border: none;
            animation: fabBreathe 2.5s ease-in-out infinite;
        }

        @keyframes fabBreathe {
            0%,
            100% {
                transform: scale(1);
                box-shadow: 0 0 20px rgba(255, 69, 0, 0.5);
            }
            50% {
                transform: scale(1.08);
                box-shadow: 0 0 32px rgba(255, 69, 0, 0.7);
            }
        }

        .fab-left:hover {
            transform: scale(1.12);
            box-shadow: 0 0 36px rgba(255, 69, 0, 0.8);
        }

        @media (max-width: 1024px) {
            .hero-content h1 {
                font-size: 2rem;
            }
            .value-props {
                grid-template-columns: repeat(2, 1fr);
            }
            .pain-points-grid {
                grid-template-columns: 1fr;
            }
            .rank-item {
                flex-wrap: wrap;
                gap: 16px;
            }
            .rank-score {
                order: 2;
                text-align: left;
                padding: 0;
            }
            .btn-rank-visit {
                order: 3;
                width: 100%;
                text-align: center;
            }
            .rank-info {
                order: 1;
                flex-basis: 100%;
            }
            .rank-badge {
                order: 0;
            }
        }

        @media (max-width: 768px) {
            .nav-links,
            .nav-cta-group {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.show {
                display: flex;
            }
            .hero-section {
                min-height: 400px;
                padding: 80px 16px 40px;
            }
            .hero-content h1 {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 1rem;
            }
            .hero-search-wrap input {
                padding: 14px 48px 14px 18px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .value-props {
                grid-template-columns: 1fr 1fr;
            }
            .cta-banner {
                padding: 36px 20px;
            }
            .cta-banner h2 {
                font-size: 1.5rem;
            }
            .section-padding {
                padding: 48px 0;
            }
            .rank-badge {
                width: 48px;
                height: 48px;
                font-size: 1.2rem;
            }
        }

/* roulang page: category3 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-fast);
        }
        a:hover {
            color: var(--accent-orange);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button, .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }
        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Header & Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }
        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }
        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }
        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }
        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }
        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }
        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }
        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255,255,255,0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }
        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255,69,0,0.3);
            transition: all var(--transition-fast);
        }
        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255,69,0,0.45);
            transform: translateY(-1px);
        }
        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11,11,11,0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255,69,0,0.2);
            z-index: 999;
        }
        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }
        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        /* Page Hero */
        .page-hero {
            background: linear-gradient(135deg, #0B0B0B 0%, #1A0A0A 100%);
            padding: 120px 0 80px;
            position: relative;
            border-bottom: 1px solid rgba(255,69,0,0.2);
            overflow: hidden;
        }
        .page-hero::before {
            content: '';
            position: absolute;
            top: -20%;
            right: 0;
            width: 60%;
            height: 140%;
            background: radial-gradient(circle at 80% 30%, rgba(255,69,0,0.15) 0%, transparent 70%);
            z-index: 0;
        }
        .hero-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 1;
        }
        .hero-text h1 {
            font-size: 3rem;
            font-weight: 800;
            line-height: 1.2;
            color: #FFFFFF;
            margin-bottom: 20px;
            text-align: left;
        }
        .hero-text h1 span {
            color: var(--accent-orange);
            display: block;
        }
        .hero-text p {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            margin-bottom: 28px;
            text-align: left;
        }
        .hero-cta-stack {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            justify-content: flex-start;
        }
        .btn-main {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--border-radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-orange);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-main:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 8px 32px rgba(255,69,0,0.4);
            transform: translateY(-2px);
            color: #fff;
        }
        .btn-outline-light {
            background: transparent;
            border: 1px solid rgba(255,255,255,0.4);
            color: #fff;
            padding: 14px 28px;
            border-radius: var(--border-radius-md);
            font-weight: 600;
            transition: all var(--transition-fast);
        }
        .btn-outline-light:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }
        .hero-visual {
            background: rgba(22,22,22,0.7);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255,69,0,0.2);
            border-radius: var(--border-radius-lg);
            padding: 24px;
            text-align: left;
        }
        .hero-visual img {
            border-radius: var(--border-radius-md);
            margin-bottom: 16px;
            width: 100%;
            object-fit: cover;
            aspect-ratio: 16/10;
        }
        .hero-visual .doc-summary {
            color: var(--text-warm-gray);
            font-size: 0.95rem;
            line-height: 1.5;
            margin-bottom: 12px;
        }
        .hero-visual .doc-list {
            list-style: none;
            margin: 0 0 16px 0;
            padding: 0;
        }
        .hero-visual .doc-list li {
            padding: 6px 0;
            border-bottom: 1px solid #2A2A2A;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--text-warm-gray);
        }
        .hero-visual .doc-list li i {
            color: var(--accent-orange);
            font-size: 0.8rem;
        }

        /* Narrative Sections */
        .section-padding {
            padding: 80px 0;
        }
        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            margin-bottom: 16px;
            text-align: left;
            color: #FFFFFF;
        }
        .section-subtitle {
            color: var(--text-muted);
            margin-bottom: 48px;
            text-align: left;
            max-width: 700px;
        }
        .promo-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 28px;
            margin-top: 32px;
        }
        .promo-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 28px;
            transition: all var(--transition-base);
            text-align: left;
        }
        .promo-card:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
            transform: translateY(-4px);
        }
        .promo-card .card-badge {
            background: var(--badge-red);
            color: #fff;
            display: inline-block;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .promo-card h4 {
            font-size: 1.4rem;
            margin-bottom: 12px;
        }
        .promo-card p {
            color: var(--text-warm-gray);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }
        .promo-card .btn-small {
            background: transparent;
            border: 1px solid var(--accent-orange);
            color: var(--accent-orange);
            padding: 10px 20px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            transition: all var(--transition-fast);
            display: inline-block;
        }
        .promo-card .btn-small:hover {
            background: var(--accent-orange);
            color: #fff;
        }

        .testimonial-simple {
            background: var(--secondary-bg);
            border-left: 4px solid var(--accent-orange);
            padding: 24px;
            border-radius: 0 var(--border-radius-md) var(--border-radius-md) 0;
            margin: 28px 0;
            text-align: left;
        }
        .testimonial-simple p {
            font-style: italic;
            color: var(--text-warm-gray);
        }
        .testimonial-simple .author {
            color: var(--accent-orange);
            font-weight: 600;
            margin-top: 8px;
        }

        .faq-block {
            margin-top: 48px;
        }
        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            padding: 20px 24px;
            margin-bottom: 16px;
            transition: all var(--transition-fast);
        }
        .faq-item:hover {
            border-color: var(--accent-orange);
        }
        .faq-item h5 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .faq-item p {
            color: var(--text-muted);
            margin: 0;
            text-align: left;
        }

        .cta-banner {
            background: linear-gradient(135deg, #1C1C1E 0%, #2A0F0F 100%);
            border: 1px solid rgba(255,69,0,0.3);
            border-radius: var(--border-radius-lg);
            padding: 48px;
            text-align: left;
            margin: 60px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
        }
        .cta-banner h3 {
            font-size: 1.8rem;
            margin-bottom: 8px;
        }

        .site-footer {
            background: #0A0A0A;
            border-top: 1px solid #2A2A2A;
            padding: 48px 0 24px;
            margin-top: 40px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-col h5 {
            color: var(--accent-orange);
            margin-bottom: 16px;
            font-size: 1.1rem;
        }
        .footer-col a, .footer-col p {
            display: block;
            color: #aaa;
            margin-bottom: 10px;
            font-size: 0.9rem;
        }
        .footer-bottom {
            border-top: 1px solid #222;
            padding-top: 20px;
            text-align: left;
            color: #777;
            font-size: 0.85rem;
        }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 100px;
            z-index: 99;
            width: 52px;
            height: 52px;
            background: rgba(11,11,11,0.85);
            backdrop-filter: blur(12px);
            border: 2px solid var(--accent-orange);
            border-radius: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-orange);
            font-size: 1.5rem;
            box-shadow: 0 0 18px rgba(255,69,0,0.5);
            transition: all var(--transition-fast);
        }
        .fab-left:hover {
            background: var(--accent-orange);
            color: #000;
            box-shadow: 0 0 28px rgba(255,69,0,0.8);
            transform: scale(1.08);
        }

        @media (max-width: 1024px) {
            .hero-content {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .hero-text h1 {
                font-size: 2.4rem;
            }
        }
        @media (max-width: 768px) {
            .nav-links, .nav-cta-group {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.active {
                display: flex;
            }
            .page-hero {
                padding: 100px 0 48px;
            }
            .cta-banner {
                flex-direction: column;
                align-items: flex-start;
                gap: 20px;
            }
        }

/* roulang page: category4 */
:root {
            --primary-bg: #0B0B0B;
            --secondary-bg: #161616;
            --accent-orange: #FF4500;
            --accent-fire-red: #FF0000;
            --text-white: #FFFFFF;
            --text-warm-gray: #CCCCCC;
            --text-muted: #999999;
            --card-bg: #1C1C1E;
            --card-border: #2A2A2A;
            --badge-orange: #FF4500;
            --badge-red: #FF0000;
            --btn-primary-bg: linear-gradient(135deg, #FF4500, #FF0000);
            --btn-primary-hover: linear-gradient(135deg, #FF5719, #FF1A1A);
            --btn-gold-bg: linear-gradient(135deg, #FFD700, #FF8C00);
            --shadow-orange: 0 4px 24px rgba(255, 69, 0, 0.25);
            --shadow-red: 0 4px 24px rgba(255, 0, 0, 0.2);
            --border-radius-sm: 6px;
            --border-radius-md: 12px;
            --border-radius-lg: 20px;
            --font-sans: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            --transition-fast: 0.2s ease;
            --transition-base: 0.3s ease;
        }

        * {
            box-sizing: border-box;
        }

        body {
            font-family: var(--font-sans);
            background: var(--primary-bg);
            color: var(--text-white);
            line-height: 1.65;
            margin: 0;
            padding: 0;
            overflow-x: hidden;
        }

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

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

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

        button,
        .btn {
            cursor: pointer;
            border: none;
            outline: none;
            font-family: inherit;
        }

        .container {
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .section-padding {
            padding: 80px 0;
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-bottom: 1px solid rgba(255, 69, 0, 0.15);
            z-index: 1000;
            padding: 0;
            transition: background var(--transition-base);
        }

        .nav-row {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            max-width: 1300px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .logo-text {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--accent-orange);
            letter-spacing: -0.5px;
            text-transform: uppercase;
            white-space: nowrap;
        }

        .logo-text span {
            color: var(--text-white);
            font-weight: 400;
            font-size: 0.9rem;
            margin-left: 4px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            padding: 6px 2px;
            position: relative;
            transition: color var(--transition-fast);
        }

        .nav-links li a::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--accent-orange);
            transition: width var(--transition-base);
        }

        .nav-links li a:hover::after,
        .nav-links li a.active::after {
            width: 100%;
        }

        .nav-links li a.active,
        .nav-links li a:hover {
            color: var(--accent-orange);
        }

        .nav-cta-group {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn-login {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.2);
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .btn-signup {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 9px 22px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            box-shadow: 0 2px 12px rgba(255, 69, 0, 0.3);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 4px 20px rgba(255, 69, 0, 0.45);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: transparent;
            color: #fff;
            font-size: 1.6rem;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            width: 100%;
            background: rgba(11, 11, 11, 0.98);
            backdrop-filter: blur(20px);
            padding: 20px;
            flex-direction: column;
            gap: 18px;
            border-top: 1px solid rgba(255, 69, 0, 0.2);
            z-index: 999;
        }

        .mobile-menu a {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-warm-gray);
            padding: 8px 0;
            display: block;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            display: inline-block;
            width: auto;
            margin-top: 8px;
        }

        /* Hero */
        .hero-section {
            padding: 140px 0 80px;
            position: relative;
            background-image: url('/assets/images/backpic/back-1.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(11, 11, 11, 0.92) 0%, rgba(22, 22, 22, 0.75) 100%);
        }

        .hero-inner {
            position: relative;
            z-index: 1;
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 69, 0, 0.1);
            border: 1px solid rgba(255, 69, 0, 0.4);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-orange);
            width: fit-content;
        }

        .hero-badge i {
            animation: pulse-icon 1.5s infinite;
        }

        @keyframes pulse-icon {
            0%,
            100% {
                transform: scale(1);
            }
            50% {
                transform: scale(1.15);
            }
        }

        .hero-title {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            color: var(--text-white);
            max-width: 700px;
        }

        .hero-title span {
            color: var(--accent-orange);
        }

        .hero-desc {
            font-size: 1.15rem;
            color: var(--text-warm-gray);
            max-width: 580px;
            line-height: 1.7;
        }

        .hero-cta-row {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-primary {
            background: var(--btn-primary-bg);
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--border-radius-md);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: var(--shadow-orange);
            transition: all var(--transition-fast);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            background: var(--btn-primary-hover);
            box-shadow: 0 6px 28px rgba(255, 69, 0, 0.5);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline {
            background: transparent;
            color: var(--text-white);
            border: 1px solid rgba(255, 255, 255, 0.3);
            padding: 14px 28px;
            border-radius: var(--border-radius-md);
            font-weight: 600;
            font-size: 1rem;
            transition: all var(--transition-fast);
        }

        .btn-outline:hover {
            border-color: var(--accent-orange);
            color: var(--accent-orange);
        }

        .hero-stats-row {
            display: flex;
            gap: 40px;
            margin-top: 16px;
        }

        .hero-stat {
            text-align: left;
        }

        .hero-stat-value {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-orange);
            line-height: 1.1;
        }

        .hero-stat-label {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-top: 4px;
        }

        /* Promo Flow */
        .promo-flow-section {
            background: var(--secondary-bg);
        }

        .section-label {
            display: inline-block;
            font-size: 0.8rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1.5px;
            color: var(--accent-orange);
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-white);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .section-desc {
            font-size: 1.05rem;
            color: var(--text-muted);
            max-width: 650px;
            line-height: 1.7;
            margin-bottom: 40px;
        }

        .flow-list {
            display: flex;
            flex-direction: column;
            gap: 32px;
            margin-top: 20px;
        }

        .flow-item {
            display: flex;
            gap: 24px;
            align-items: flex-start;
            padding: 28px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            transition: all var(--transition-fast);
            position: relative;
            overflow: hidden;
        }

        .flow-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--accent-orange);
            border-radius: 4px 0 0 4px;
        }

        .flow-item:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
        }

        .flow-icon {
            width: 56px;
            height: 56px;
            min-width: 56px;
            background: rgba(255, 69, 0, 0.12);
            border-radius: var(--border-radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            color: var(--accent-orange);
        }

        .flow-content h3 {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 6px;
        }

        .flow-content p {
            font-size: 0.95rem;
            color: var(--text-warm-gray);
            line-height: 1.6;
            margin: 0;
        }

        .flow-content .promo-code {
            display: inline-block;
            background: rgba(255, 215, 0, 0.1);
            border: 1px dashed #FFD700;
            color: #FFD700;
            padding: 4px 12px;
            border-radius: var(--border-radius-sm);
            font-weight: 700;
            font-size: 0.95rem;
            margin-top: 8px;
        }

        /* Cards Grid */
        .promo-cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
            margin-top: 40px;
        }

        .promo-card {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            overflow: hidden;
            transition: all var(--transition-base);
            position: relative;
        }

        .promo-card:hover {
            border-color: var(--accent-orange);
            box-shadow: var(--shadow-orange);
            transform: translateY(-4px);
        }

        .promo-card-img {
            position: relative;
            height: 180px;
            overflow: hidden;
        }

        .promo-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .promo-card:hover .promo-card-img img {
            transform: scale(1.05);
        }

        .promo-card-tag {
            position: absolute;
            top: 12px;
            right: 12px;
            background: var(--accent-fire-red);
            color: #fff;
            padding: 4px 12px;
            border-radius: 50px;
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
        }

        .promo-card-body {
            padding: 20px;
        }

        .promo-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .promo-card-body p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .promo-card-footer {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .promo-card-value {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--accent-orange);
        }

        .btn-small {
            padding: 8px 18px;
            border-radius: var(--border-radius-sm);
            font-weight: 600;
            font-size: 0.85rem;
            background: var(--btn-primary-bg);
            color: #fff;
            transition: all var(--transition-fast);
        }

        .btn-small:hover {
            background: var(--btn-primary-hover);
            color: #fff;
        }

        /* Timeline / Steps */
        .steps-section {
            background: var(--primary-bg);
        }

        .steps-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 28px;
            margin-top: 32px;
        }

        .step-item {
            text-align: left;
            padding: 24px;
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            transition: all var(--transition-fast);
            position: relative;
        }

        .step-item:hover {
            border-color: var(--accent-orange);
        }

        .step-number {
            font-size: 2.5rem;
            font-weight: 900;
            color: rgba(255, 69, 0, 0.2);
            line-height: 1;
            margin-bottom: 8px;
        }

        .step-item h4 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 8px;
        }

        .step-item p {
            font-size: 0.9rem;
            color: var(--text-warm-gray);
            line-height: 1.6;
            margin: 0;
        }

        /* FAQ */
        .faq-section {
            background: var(--secondary-bg);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--card-border);
            border-radius: var(--border-radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: rgba(255, 69, 0, 0.4);
        }

        .faq-question {
            padding: 20px 24px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-white);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            transition: all var(--transition-fast);
        }

        .faq-question i {
            color: var(--accent-orange);
            transition: transform var(--transition-fast);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.4s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 20px;
            color: var(--text-warm-gray);
            line-height: 1.6;
            font-size: 0.95rem;
        }

        /* CTA */
        .cta-section {
            background: var(--primary-bg);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle at center, rgba(255, 69, 0, 0.06) 0%, transparent 70%);
        }

        .cta-inner {
            position: relative;
            z-index: 1;
            max-width: 650px;
            margin: 0 auto;
        }

        /* Footer */
        .site-footer {
            background: var(--secondary-bg);
            border-top: 1px solid var(--card-border);
            padding: 40px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h5 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-white);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            font-size: 0.9rem;
            margin-bottom: 8px;
            transition: color var(--transition-fast);
        }

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

        .footer-bottom {
            text-align: center;
            padding-top: 24px;
            border-top: 1px solid var(--card-border);
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* FAB Left */
        .fab-left {
            position: fixed;
            left: 24px;
            bottom: 96px;
            z-index: 50;
            background: rgba(11, 11, 11, 0.6);
            backdrop-filter: blur(12px);
            border: 2px solid;
            border-image: linear-gradient(135deg, #FF4500, #FFD700) 1;
            border-radius: 50px;
            padding: 12px 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 0.85rem;
            color: var(--accent-orange);
            box-shadow: 0 0 18px rgba(255, 69, 0, 0.4);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .fab-left:hover {
            transform: scale(1.08);
            box-shadow: 0 0 28px rgba(255, 69, 0, 0.6);
            color: #fff;
        }

        .fab-left i {
            font-size: 1.2rem;
            animation: float-icon 2s infinite ease-in-out;
        }

        @keyframes float-icon {
            0%,
            100% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-4px);
            }
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.3rem;
            }
            .hero-desc {
                font-size: 1rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .promo-cards-grid {
                grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            .nav-cta-group .btn-login,
            .nav-cta-group .btn-signup {
                display: none;
            }
            .mobile-toggle {
                display: block;
            }
            .mobile-menu.show {
                display: flex;
            }
            .hero-title {
                font-size: 2rem;
            }
            .hero-stats-row {
                gap: 24px;
                flex-wrap: wrap;
            }
            .hero-stat-value {
                font-size: 1.5rem;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .flow-item {
                flex-direction: column;
                gap: 16px;
            }
            .promo-cards-grid {
                grid-template-columns: 1fr;
            }
            .steps-list {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .fab-left {
                left: 12px;
                bottom: 80px;
                padding: 10px 14px;
                font-size: 0.8rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section {
                padding: 120px 0 60px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-cta-row {
                flex-direction: column;
                align-items: flex-start;
            }
            .section-padding {
                padding: 50px 0;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }