/* roulang page: index */
:root {
            --bg-primary: #08090F;
            --bg-secondary: #0D111E;
            --bg-card: rgba(13, 17, 30, 0.7);
            --bg-glass: rgba(8, 9, 15, 0.5);
            --accent-blue: #0052FF;
            --accent-cyan: #00F0FF;
            --accent-glow: rgba(0, 240, 255, 0.4);
            --accent-blue-glow: rgba(0, 82, 255, 0.3);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #94A3B8;
            --border-dim: rgba(255, 255, 255, 0.08);
            --border-electric: rgba(0, 240, 255, 0.3);
            --border-blue: rgba(0, 82, 255, 0.25);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --radius-xl: 28px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
            --shadow-glow-cyan: 0 0 20px rgba(0, 240, 255, 0.25);
            --shadow-glow-blue: 0 0 20px rgba(0, 82, 255, 0.2);
            --font-heading: 'Plus Jakarta Sans', 'Inter', sans-serif;
            --font-body: 'Inter', -apple-system, sans-serif;
            --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-body);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            overflow-x: hidden;
            background-image: 
                radial-gradient(ellipse at 20% 0%, rgba(0, 82, 255, 0.08) 0%, transparent 50%),
                radial-gradient(ellipse at 80% 100%, rgba(0, 240, 255, 0.06) 0%, transparent 50%);
            background-attachment: fixed;
        }

        h1, h2, h3, h4, h5, h6 {
            font-family: var(--font-heading);
            font-weight: 700;
            line-height: 1.25;
            letter-spacing: -0.02em;
        }

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

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

        ul, ol {
            list-style: none;
        }

        button, input, select, textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 clamp(16px, 4vw, 40px);
        }

        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(8, 9, 15, 0.75);
            backdrop-filter: blur(20px) saturate(180%);
            -webkit-backdrop-filter: blur(20px) saturate(180%);
            border-bottom: 1px solid var(--border-dim);
            transition: background var(--transition-smooth), box-shadow var(--transition-smooth);
        }

        header.scrolled {
            background: rgba(8, 9, 15, 0.92);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            padding: 0 clamp(16px, 4vw, 40px);
        }

        .logo {
            font-family: var(--font-heading);
            font-weight: 800;
            font-size: 1.25rem;
            color: var(--text-primary);
            letter-spacing: -0.03em;
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .logo i {
            color: var(--accent-cyan);
            font-size: 1.4rem;
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
        }

        .nav-links a {
            display: inline-flex;
            align-items: center;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.9rem;
            color: var(--text-secondary);
            transition: all var(--transition-fast);
            position: relative;
            white-space: nowrap;
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(255, 255, 255, 0.05);
        }

        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 20px;
            height: 3px;
            background: var(--accent-cyan);
            border-radius: 4px;
            box-shadow: 0 0 10px var(--accent-glow);
        }

        .nav-auth {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .btn-login {
            padding: 8px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.88rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-dim);
            cursor: pointer;
            transition: all var(--transition-fast);
        }

        .btn-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: 0 0 12px rgba(0, 240, 255, 0.15);
        }

        .btn-signup {
            padding: 8px 22px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.88rem;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            border: none;
            cursor: pointer;
            transition: all var(--transition-fast);
            box-shadow: 0 0 16px rgba(0, 240, 255, 0.2);
        }

        .btn-signup:hover {
            box-shadow: 0 0 28px rgba(0, 240, 255, 0.4);
            transform: translateY(-1px);
        }

        .mobile-menu-btn {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.5rem;
            cursor: pointer;
            padding: 8px;
        }

        .mobile-menu {
            display: none;
            position: fixed;
            top: 64px;
            left: 0;
            right: 0;
            background: rgba(8, 9, 15, 0.95);
            backdrop-filter: blur(20px);
            border-bottom: 1px solid var(--border-dim);
            padding: 16px;
            flex-direction: column;
            gap: 8px;
            z-index: 999;
        }

        .mobile-menu.active {
            display: flex;
        }

        .mobile-menu a {
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition-fast);
        }

        .mobile-menu a:hover,
        .mobile-menu a.active {
            background: rgba(255, 255, 255, 0.05);
            color: var(--text-primary);
        }

        .mobile-menu .mobile-auth {
            display: flex;
            gap: 8px;
            margin-top: 8px;
        }

        .mobile-menu .btn-login,
        .mobile-menu .btn-signup {
            flex: 1;
            text-align: center;
            padding: 10px 16px;
        }

        @media (max-width: 768px) {
            .nav-links, .nav-auth {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
        }

        .hero-section {
            position: relative;
            padding: 120px 0 80px;
            overflow: hidden;
        }

        .hero-bento {
            display: grid;
            grid-template-columns: 2fr 1fr;
            grid-template-rows: auto auto;
            gap: 20px;
            position: relative;
            z-index: 1;
        }

        .hero-main-block {
            grid-column: 1;
            grid-row: 1 / 3;
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-electric);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-glow-cyan);
        }

        .hero-main-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
            opacity: 0.15;
            z-index: 0;
        }

        .hero-main-block > * {
            position: relative;
            z-index: 1;
        }

        .hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(0, 240, 255, 0.12);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            margin-bottom: 24px;
            width: fit-content;
        }

        .hero-tag i {
            font-size: 0.65rem;
            animation: pulse-dot 2s infinite;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }

        .hero-title {
            font-size: clamp(2.2rem, 5vw, 3.4rem);
            font-weight: 800;
            line-height: 1.15;
            margin-bottom: 20px;
            letter-spacing: -0.04em;
            color: var(--text-primary);
        }

        .hero-title span {
            background: linear-gradient(135deg, var(--accent-cyan), #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-desc {
            font-size: clamp(0.95rem, 1.8vw, 1.1rem);
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 560px;
            margin-bottom: 32px;
        }

        .hero-cta-group {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        .btn-primary {
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 700;
            font-size: 0.95rem;
            color: #08090F;
            background: linear-gradient(135deg, var(--accent-cyan), #3B82F6);
            border: none;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 24px rgba(0, 240, 255, 0.3);
            text-align: center;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            padding: 14px 32px;
            border-radius: var(--radius-md);
            font-weight: 600;
            font-size: 0.95rem;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid var(--border-electric);
            cursor: pointer;
            transition: all var(--transition-fast);
            text-align: center;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-secondary:hover {
            background: rgba(0, 240, 255, 0.08);
            border-color: var(--accent-cyan);
        }

        .hero-small-block {
            background: var(--bg-glass);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-blue);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            display: flex;
            flex-direction: column;
            justify-content: center;
            gap: 8px;
            box-shadow: var(--shadow-glow-blue);
            transition: all var(--transition-smooth);
        }

        .hero-small-block:hover {
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-glow-cyan);
        }

        .hero-stat-number {
            font-size: 2rem;
            font-weight: 800;
            font-family: var(--font-heading);
            background: linear-gradient(135deg, var(--accent-cyan), #60A5FA);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-stat-label {
            font-size: 0.85rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        .hero-cta-strip {
            grid-column: 2;
            grid-row: 2;
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid var(--border-blue);
            border-radius: var(--radius-lg);
            padding: 20px 24px;
            display: flex;
            align-items: center;
            gap: 16px;
            box-shadow: var(--shadow-glow-blue);
        }

        .hero-cta-strip-text {
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            flex: 1;
        }

        .hero-cta-strip .btn-primary {
            padding: 10px 24px;
            font-size: 0.85rem;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 968px) {
            .hero-bento {
                grid-template-columns: 1fr;
            }
            .hero-main-block {
                grid-column: 1;
                grid-row: 1;
                padding: 32px 24px;
            }
            .hero-small-block {
                grid-column: 1;
                grid-row: 2;
            }
            .hero-cta-strip {
                grid-column: 1;
                grid-row: 3;
            }
            .hero-section {
                padding: 100px 0 60px;
            }
        }

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

        .section-label {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 0.82rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            margin-bottom: 12px;
        }

        .section-label::before {
            content: '';
            width: 24px;
            height: 2px;
            background: var(--accent-cyan);
            border-radius: 2px;
            box-shadow: 0 0 6px var(--accent-glow);
        }

        .section-title {
            font-size: clamp(1.8rem, 3.5vw, 2.4rem);
            font-weight: 800;
            letter-spacing: -0.03em;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 680px;
            margin-bottom: 40px;
        }

        .reward-preview-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
        }

        .reward-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            padding: 28px 20px;
            text-align: left;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

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

        .reward-icon {
            font-size: 2rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            filter: drop-shadow(0 0 8px var(--accent-glow));
        }

        .reward-card h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }

        .reward-card p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.5;
            margin-bottom: 16px;
        }

        .reward-card .btn-primary {
            padding: 8px 18px;
            font-size: 0.8rem;
            border-radius: var(--radius-sm);
            width: 100%;
            justify-content: center;
        }

        @media (max-width: 1024px) {
            .reward-preview-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 520px) {
            .reward-preview-grid {
                grid-template-columns: 1fr;
            }
        }

        .entry-matrix {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
        }

        .entry-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            padding: 32px 24px;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 12px;
            transition: all var(--transition-smooth);
            cursor: pointer;
            text-decoration: none;
            color: inherit;
        }

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

        .entry-card-icon {
            width: 48px;
            height: 48px;
            border-radius: var(--radius-sm);
            background: rgba(0, 240, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }

        .entry-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
        }

        .entry-card p {
            font-size: 0.88rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        .entry-card .entry-arrow {
            margin-top: auto;
            color: var(--accent-cyan);
            font-size: 0.85rem;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 6px;
        }

        @media (max-width: 768px) {
            .entry-matrix {
                grid-template-columns: 1fr;
            }
        }

        .latest-updates {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 30px;
        }

        .updates-list {
            display: flex;
            flex-direction: column;
            gap: 1px;
            background: var(--border-dim);
            border-radius: var(--radius-lg);
            overflow: hidden;
        }

        .update-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 16px;
            transition: all var(--transition-fast);
        }

        .update-item:hover {
            background: rgba(0, 240, 255, 0.04);
        }

        .update-item-info h4 {
            font-size: 0.95rem;
            font-weight: 600;
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .update-item-info h4 a {
            color: var(--text-primary);
            transition: color var(--transition-fast);
        }

        .update-item-info h4 a:hover {
            color: var(--accent-cyan);
        }

        .update-item-meta {
            font-size: 0.78rem;
            color: var(--text-muted);
            display: flex;
            gap: 12px;
        }

        .update-item-arrow {
            color: var(--accent-cyan);
            font-size: 1.1rem;
            flex-shrink: 0;
            transition: transform var(--transition-fast);
        }

        .update-item:hover .update-item-arrow {
            transform: translateX(4px);
        }

        .latest-sidebar {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-blue);
            border-radius: var(--radius-lg);
            padding: 28px 24px;
            box-shadow: var(--shadow-glow-blue);
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-self: start;
            position: sticky;
            top: 80px;
        }

        .latest-sidebar h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--accent-cyan);
        }

        .sidebar-item {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-dim);
        }

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

        .sidebar-item a {
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition-fast);
            line-height: 1.4;
        }

        .sidebar-item a:hover {
            color: var(--accent-cyan);
        }

        @media (max-width: 768px) {
            .latest-updates {
                grid-template-columns: 1fr;
            }
            .latest-sidebar {
                position: static;
            }
        }

        .hot-list-section {
            background: var(--bg-secondary);
            border-radius: var(--radius-xl);
            padding: 48px 40px;
            border: 1px solid var(--border-dim);
        }

        .hot-list-table {
            width: 100%;
        }

        .hot-list-row {
            display: grid;
            grid-template-columns: 40px 1fr auto;
            gap: 16px;
            align-items: center;
            padding: 16px 0;
            border-bottom: 1px solid var(--border-dim);
            transition: all var(--transition-fast);
        }

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

        .hot-list-row:hover {
            background: rgba(0, 240, 255, 0.03);
            border-radius: var(--radius-sm);
            padding-left: 12px;
            padding-right: 12px;
        }

        .hot-rank {
            font-size: 2rem;
            font-weight: 800;
            font-family: var(--font-heading);
            color: var(--accent-cyan);
            opacity: 0.6;
            text-align: center;
        }

        .hot-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 4px;
        }

        .hot-info p {
            font-size: 0.82rem;
            color: var(--text-muted);
            line-height: 1.4;
        }

        .hot-cta .btn-primary {
            padding: 8px 20px;
            font-size: 0.8rem;
            border-radius: var(--radius-sm);
        }

        @media (max-width: 520px) {
            .hot-list-row {
                grid-template-columns: 32px 1fr;
            }
            .hot-cta {
                grid-column: 2;
                margin-top: 4px;
            }
        }

        .faq-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }

        .faq-item {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-dim);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: all var(--transition-fast);
        }

        .faq-item:hover {
            border-color: var(--accent-cyan);
        }

        .faq-item h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .faq-item p {
            font-size: 0.9rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        @media (max-width: 768px) {
            .faq-grid {
                grid-template-columns: 1fr;
            }
        }

        .cta-footer-section {
            text-align: center;
            padding: 80px 0;
            position: relative;
            overflow: hidden;
        }

        .cta-footer-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            opacity: 0.1;
            z-index: 0;
        }

        .cta-footer-section > * {
            position: relative;
            z-index: 1;
        }

        .cta-footer-title {
            font-size: clamp(2rem, 4vw, 2.8rem);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-footer-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 500px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }

        footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-dim);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding: 60px 0 40px;
        }

        .footer-brand .logo {
            margin-bottom: 16px;
            display: inline-flex;
        }

        .footer-brand p {
            font-size: 0.85rem;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
        }

        .footer-col h5 {
            font-size: 0.85rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }

        .footer-col a {
            display: block;
            font-size: 0.85rem;
            color: var(--text-muted);
            padding: 5px 0;
            transition: color var(--transition-fast);
        }

        .footer-col a:hover {
            color: var(--text-primary);
        }

        .footer-bottom {
            border-top: 1px solid var(--border-dim);
            padding: 20px 0;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            flex-wrap: wrap;
            gap: 12px;
        }

        .footer-badges {
            display: flex;
            gap: 12px;
            align-items: center;
            font-size: 0.78rem;
            color: var(--accent-cyan);
        }

        @media (max-width: 900px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        .fab-left {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 50;
            width: 52px;
            height: 52px;
            border-radius: 30px;
            background: rgba(8, 9, 15, 0.7);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid var(--accent-cyan);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.35);
            color: var(--accent-cyan);
            font-size: 1.3rem;
            animation: fab-glow 3s infinite ease-in-out;
        }

        @keyframes fab-glow {
            0%, 100% { box-shadow: 0 0 18px rgba(0, 240, 255, 0.35); }
            50% { box-shadow: 0 0 32px rgba(0, 240, 255, 0.6); }
        }

        .fab-left:hover {
            transform: scale(1.1);
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.7);
        }

        .fab-left .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 14px;
            height: 14px;
            background: #FF007F;
            border-radius: 50%;
            animation: blink 1s infinite;
        }

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

        .scroll-top {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 50;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: var(--accent-blue);
            color: #fff;
            border: none;
            cursor: pointer;
            font-size: 1.1rem;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all var(--transition-fast);
            opacity: 0.7;
        }

        .scroll-top:hover {
            opacity: 1;
            transform: translateY(-3px);
            box-shadow: 0 0 20px rgba(0, 82, 255, 0.5);
        }

        .text-link {
            color: var(--accent-cyan);
            font-weight: 600;
            transition: all var(--transition-fast);
        }

        .text-link:hover {
            text-decoration: underline;
            color: #fff;
        }

/* roulang page: category1 */
:root {
            --deep-space: #08090F;
            --cyber-navy: #0D111E;
            --electric-blue: #0052FF;
            --neon-cyan: #00F0FF;
            --text-white: #FFFFFF;
            --cool-silver: #CBD5E1;
            --glass-bg: rgba(13, 17, 30, 0.75);
            --glass-border: rgba(0, 82, 255, 0.25);
            --glow-cyan: 0 0 15px rgba(0, 240, 255, 0.5);
            --glow-blue: 0 0 20px rgba(0, 82, 255, 0.4);
            --btn-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --card-bg: rgba(13, 17, 30, 0.6);
            --section-gap: 5rem;
            --radius-lg: 20px;
            --radius-md: 14px;
            --radius-sm: 8px;
            --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
        }

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

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

        .container {
            width: 100%;
            max-width: 1320px;
            margin: 0 auto;
            padding: 0 20px;
        }

        /* Navigation */
        .navbar-custom {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.3);
            padding: 15px 0;
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .logo {
            font-size: 1.6rem;
            font-weight: 700;
            color: var(--text-white);
            text-decoration: none;
            display: flex;
            align-items: center;
            gap: 10px;
            letter-spacing: -0.3px;
        }

        .logo i {
            color: var(--neon-cyan);
            font-size: 1.8rem;
            filter: drop-shadow(0 0 8px rgba(0, 240, 255, 0.6));
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2.5rem;
        }

        .nav-links a {
            color: var(--cool-silver);
            text-decoration: none;
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
            padding: 6px 0;
            transition: var(--transition);
            letter-spacing: 0.3px;
        }

        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--neon-cyan);
            border-radius: 4px;
            transition: width 0.25s ease;
            box-shadow: var(--glow-cyan);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-white);
        }

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

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

        .btn-login {
            background: transparent;
            border: 1px solid var(--cool-silver);
            color: var(--text-white);
            padding: 8px 22px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 0.9rem;
            transition: var(--transition);
            cursor: pointer;
        }

        .btn-login:hover {
            border-color: var(--neon-cyan);
            color: var(--neon-cyan);
            box-shadow: var(--glow-cyan);
        }

        .btn-signup {
            background: var(--btn-gradient);
            border: none;
            color: #fff;
            padding: 8px 26px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: var(--transition);
            box-shadow: 0 4px 14px rgba(0, 82, 255, 0.45);
        }

        .btn-signup:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 22px rgba(0, 240, 255, 0.55);
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-white);
            font-size: 1.8rem;
            cursor: pointer;
        }

        /* Page Banner */
        .page-banner {
            background: linear-gradient(135deg, rgba(8,9,15,0.9) 0%, rgba(13,17,30,0.7) 100%), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            padding: 4.5rem 0 3.5rem;
            text-align: left;
            border-bottom: 1px solid rgba(0, 240, 255, 0.2);
            position: relative;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 30% 50%, rgba(0,240,255,0.08) 0%, transparent 70%);
            pointer-events: none;
        }

        .banner-content h1 {
            font-size: 2.8rem;
            font-weight: 800;
            letter-spacing: -0.5px;
            margin-bottom: 1rem;
            background: linear-gradient(to right, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .banner-content p {
            font-size: 1.15rem;
            color: var(--cool-silver);
            max-width: 750px;
            line-height: 1.7;
        }

        .breadcrumb-custom {
            background: transparent;
            padding: 0;
            margin-bottom: 1.8rem;
            font-size: 0.85rem;
        }

        .breadcrumb-custom a {
            color: var(--neon-cyan);
            text-decoration: none;
        }

        .breadcrumb-custom .active {
            color: var(--cool-silver);
        }

        /* Trust Metrics */
        .trust-metrics {
            display: flex;
            gap: 2rem;
            margin-top: 2.5rem;
            flex-wrap: wrap;
        }

        .metric-item {
            display: flex;
            align-items: center;
            gap: 12px;
            background: var(--glass-bg);
            backdrop-filter: blur(12px);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-md);
            padding: 14px 22px;
        }

        .metric-item i {
            font-size: 1.6rem;
            color: var(--neon-cyan);
            filter: drop-shadow(0 0 6px rgba(0,240,255,0.6));
        }

        .metric-text strong {
            display: block;
            font-size: 1.2rem;
            font-weight: 700;
        }

        .metric-text span {
            font-size: 0.8rem;
            color: var(--cool-silver);
        }

        /* Section Titles */
        .section-title {
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
            letter-spacing: -0.4px;
        }

        .section-subtitle {
            color: var(--cool-silver);
            font-size: 1rem;
            margin-bottom: 2.5rem;
            line-height: 1.6;
        }

        .divider-glow {
            width: 70px;
            height: 4px;
            background: var(--neon-cyan);
            border-radius: 4px;
            margin-bottom: 1.8rem;
            box-shadow: var(--glow-cyan);
        }

        /* Review Cards */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }

        .review-card {
            background: var(--card-bg);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(0, 82, 255, 0.2);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .review-card:hover {
            border-color: var(--neon-cyan);
            transform: translateY(-6px);
            box-shadow: 0 12px 28px rgba(0, 240, 255, 0.15);
        }

        .review-card .icon-box {
            width: 50px;
            height: 50px;
            background: rgba(0, 240, 255, 0.1);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 1.5rem;
        }

        .icon-box i {
            font-size: 1.8rem;
            color: var(--neon-cyan);
        }

        .review-card h3 {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .review-card p {
            color: var(--cool-silver);
            line-height: 1.7;
            font-size: 0.95rem;
        }

        .rating-stars {
            color: #FFD700;
            margin-top: 1rem;
            font-size: 0.9rem;
        }

        /* Comparison Table */
        .table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius-lg);
            border: 1px solid rgba(0, 240, 255, 0.2);
        }

        .table-custom {
            width: 100%;
            border-collapse: collapse;
            background: var(--card-bg);
            backdrop-filter: blur(12px);
            color: var(--text-white);
        }

        .table-custom th {
            background: rgba(0, 82, 255, 0.25);
            padding: 16px 20px;
            font-weight: 700;
            text-align: left;
            font-size: 0.9rem;
            color: var(--neon-cyan);
        }

        .table-custom td {
            padding: 14px 20px;
            border-top: 1px solid rgba(255,255,255,0.08);
            font-size: 0.9rem;
        }

        .badge-check {
            background: rgba(0, 240, 255, 0.15);
            color: var(--neon-cyan);
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* Process Steps */
        .steps-vertical {
            display: flex;
            flex-direction: column;
            gap: 1.8rem;
            padding-left: 0;
        }

        .step-item {
            display: flex;
            gap: 1.2rem;
            align-items: flex-start;
        }

        .step-number {
            min-width: 44px;
            height: 44px;
            background: var(--btn-gradient);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
            box-shadow: var(--glow-blue);
        }

        .step-text h4 {
            font-weight: 700;
            margin-bottom: 4px;
        }

        .step-text p {
            color: var(--cool-silver);
            font-size: 0.9rem;
        }

        /* FAQ */
        .faq-item {
            background: var(--card-bg);
            border: 1px solid rgba(0, 82, 255, 0.2);
            border-radius: var(--radius-md);
            margin-bottom: 1rem;
            overflow: hidden;
        }

        .faq-question {
            width: 100%;
            background: transparent;
            border: none;
            color: var(--text-white);
            padding: 18px 24px;
            font-weight: 600;
            font-size: 1rem;
            text-align: left;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }

        .faq-answer {
            padding: 0 24px 18px;
            color: var(--cool-silver);
            font-size: 0.92rem;
            line-height: 1.7;
        }

        /* CTA */
        .cta-block {
            background: linear-gradient(135deg, rgba(0,82,255,0.2) 0%, rgba(0,240,255,0.1) 100%);
            border: 1px solid var(--glass-border);
            border-radius: var(--radius-lg);
            padding: 3rem 2rem;
            text-align: center;
        }

        .btn-primary-glow {
            background: var(--btn-gradient);
            border: none;
            padding: 14px 40px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1.1rem;
            color: #fff;
            box-shadow: 0 6px 20px rgba(0, 82, 255, 0.5);
            transition: var(--transition);
        }

        .btn-primary-glow:hover {
            transform: translateY(-3px);
            box-shadow: 0 12px 28px rgba(0, 240, 255, 0.65);
        }

        /* Footer */
        footer {
            background: rgba(8,9,15,0.9);
            border-top: 1px solid rgba(0, 82, 255, 0.3);
            padding: 3.5rem 0 2rem;
            margin-top: var(--section-gap);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
            margin-bottom: 2rem;
        }

        .footer-brand .logo {
            font-size: 1.4rem;
            margin-bottom: 1rem;
        }

        .footer-brand p {
            color: var(--cool-silver);
            font-size: 0.88rem;
        }

        .footer-col h5 {
            font-weight: 700;
            margin-bottom: 1rem;
            font-size: 1rem;
        }

        .footer-col a {
            display: block;
            color: var(--cool-silver);
            text-decoration: none;
            font-size: 0.88rem;
            margin-bottom: 0.6rem;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: var(--neon-cyan);
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            border-top: 1px solid rgba(255,255,255,0.08);
            padding-top: 1.5rem;
            font-size: 0.82rem;
            color: var(--cool-silver);
        }

        .footer-badges i {
            color: var(--neon-cyan);
            margin-right: 4px;
        }

        @media (max-width: 992px) {
            .nav-links {
                gap: 1.5rem;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links, .nav-actions {
                display: none;
            }
            .nav-toggle {
                display: block;
            }
            .banner-content h1 {
                font-size: 2rem;
            }
            .trust-metrics {
                flex-direction: column;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                gap: 0.8rem;
                text-align: center;
            }
        }

/* roulang page: article */
:root {
            --bg-primary: #0A0E17;
            --bg-secondary: #111827;
            --bg-card: rgba(17, 25, 40, 0.75);
            --bg-card-hover: rgba(25, 37, 55, 0.9);
            --accent-primary: #0052FF;
            --accent-secondary: #00F0FF;
            --accent-glow: rgba(0, 82, 255, 0.5);
            --accent-cyan-glow: rgba(0, 240, 255, 0.4);
            --text-primary: #FFFFFF;
            --text-secondary: #CBD5E1;
            --text-muted: #8896AA;
            --border-color: rgba(0, 82, 255, 0.3);
            --border-glow: rgba(0, 240, 255, 0.25);
            --button-gradient: linear-gradient(135deg, #0052FF 0%, #00F0FF 100%);
            --button-hover-gradient: linear-gradient(135deg, #0040CC 0%, #00C8E0 100%);
            --radius-sm: 8px;
            --radius-md: 12px;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4), 0 0 0 1px var(--border-color) inset;
            --shadow-hover: 0 8px 40px rgba(0, 82, 255, 0.3), 0 0 0 1px var(--border-glow) inset;
            --shadow-button: 0 0 20px rgba(0, 240, 255, 0.3);
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            --container-max: 1200px;
            --header-height: 72px;
        }

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

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

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(ellipse at 30% 20%, rgba(0, 82, 255, 0.08) 0%, transparent 60%),
                radial-gradient(ellipse at 70% 65%, rgba(0, 240, 255, 0.06) 0%, transparent 60%),
                radial-gradient(ellipse at 50% 90%, rgba(0, 82, 255, 0.04) 0%, transparent 50%);
            pointer-events: none;
            z-index: 0;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* Header & Navigation */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(10, 14, 23, 0.82);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(0, 82, 255, 0.2);
            box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--header-height);
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            color: var(--text-primary);
            font-weight: 800;
            font-size: 1.35rem;
            letter-spacing: -0.4px;
            white-space: nowrap;
            z-index: 101;
        }

        .logo i {
            color: var(--accent-secondary);
            filter: drop-shadow(0 0 10px rgba(0, 240, 255, 0.6));
            font-size: 1.5rem;
        }

        .logo span {
            background: linear-gradient(135deg, #FFFFFF 0%, #00F0FF 80%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-links a {
            text-decoration: none;
            color: var(--text-secondary);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-weight: 500;
            font-size: 0.95rem;
            transition: all 0.25s ease;
            position: relative;
            letter-spacing: 0.2px;
        }

        .nav-links a:hover {
            color: var(--text-primary);
            background: rgba(0, 82, 255, 0.12);
            box-shadow: 0 0 12px rgba(0, 82, 255, 0.2) inset;
        }

        .nav-links a.active {
            color: var(--text-primary);
            background: rgba(0, 82, 255, 0.2);
            box-shadow: 0 0 16px rgba(0, 82, 255, 0.3) inset;
            font-weight: 600;
        }

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

        .btn-login {
            background: transparent;
            color: var(--text-primary);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 9px 20px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            letter-spacing: 0.3px;
        }

        .btn-login:hover {
            border-color: var(--accent-secondary);
            box-shadow: 0 0 14px rgba(0, 240, 255, 0.3);
            background: rgba(255, 255, 255, 0.06);
        }

        .btn-signup {
            background: var(--button-gradient);
            color: #FFFFFF;
            border: none;
            padding: 10px 22px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            transition: all 0.25s ease;
            text-decoration: none;
            box-shadow: var(--shadow-button);
            letter-spacing: 0.3px;
            position: relative;
            overflow: hidden;
        }

        .btn-signup::after {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: linear-gradient(45deg, transparent 30%, rgba(255, 255, 255, 0.1) 50%, transparent 70%);
            transform: rotate(25deg);
            transition: transform 0.6s;
        }

        .btn-signup:hover::after {
            transform: rotate(25deg) translateX(100%);
        }

        .btn-signup:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
            transform: translateY(-1px);
        }

        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text-primary);
            font-size: 1.6rem;
            cursor: pointer;
            z-index: 101;
            padding: 8px;
            border-radius: var(--radius-sm);
        }

        /* Article Hero */
        .article-hero {
            background: linear-gradient(180deg, rgba(0, 82, 255, 0.12) 0%, transparent 40%);
            border-bottom: 1px solid rgba(0, 240, 255, 0.1);
            padding: 48px 0 40px;
        }

        .article-hero .container {
            max-width: 860px;
        }

        .article-category-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(0, 240, 255, 0.12);
            color: var(--accent-secondary);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            letter-spacing: 0.5px;
            margin-bottom: 20px;
            text-transform: uppercase;
        }

        .article-hero h1 {
            font-size: clamp(2rem, 4.5vw, 3rem);
            font-weight: 800;
            line-height: 1.25;
            letter-spacing: -0.6px;
            margin-bottom: 16px;
            background: linear-gradient(135deg, #FFFFFF 0%, #CBD5E1 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

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

        .article-meta i {
            color: var(--accent-secondary);
            opacity: 0.7;
        }

        /* Article Body */
        .article-body {
            padding: 48px 0;
            flex: 1;
        }

        .article-body .container {
            max-width: 860px;
        }

        .article-content {
            color: var(--text-secondary);
            font-size: 1.05rem;
            line-height: 1.75;
            letter-spacing: 0.15px;
        }

        .article-content h2 {
            font-size: 1.75rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-top: 40px;
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(0, 82, 255, 0.25);
            letter-spacing: -0.4px;
        }

        .article-content h3 {
            font-size: 1.35rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-top: 32px;
            margin-bottom: 12px;
        }

        .article-content p {
            margin-bottom: 18px;
            color: var(--text-secondary);
        }

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

        .article-content li {
            margin-bottom: 8px;
            color: var(--text-secondary);
        }

        .article-content a {
            color: var(--accent-secondary);
            text-decoration: none;
            font-weight: 500;
            border-bottom: 1px solid rgba(0, 240, 255, 0.4);
            transition: all 0.2s;
        }

        .article-content a:hover {
            color: #FFFFFF;
            border-bottom-color: #FFFFFF;
        }

        .article-content blockquote {
            background: rgba(0, 82, 255, 0.08);
            border-left: 4px solid var(--accent-primary);
            padding: 20px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 28px 0;
            color: var(--text-primary);
            font-style: italic;
        }

        .article-content img {
            max-width: 100%;
            border-radius: var(--radius-lg);
            margin: 24px 0;
            border: 1px solid rgba(255, 255, 255, 0.08);
        }

        .article-content .highlight-box {
            background: rgba(0, 82, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.25);
            border-radius: var(--radius-md);
            padding: 24px;
            margin: 28px 0;
            backdrop-filter: blur(10px);
        }

        .article-cta-card {
            background: var(--bg-card);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 36px;
            margin: 40px 0;
            text-align: center;
            box-shadow: var(--shadow-card);
        }

        .article-cta-card h3 {
            margin-top: 0;
            margin-bottom: 12px;
        }

        .article-cta-card .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            background: var(--button-gradient);
            color: #FFFFFF;
            padding: 14px 36px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 1rem;
            text-decoration: none;
            box-shadow: var(--shadow-button);
            transition: all 0.3s;
            margin-top: 16px;
        }

        .article-cta-card .btn-primary:hover {
            box-shadow: 0 0 40px rgba(0, 240, 255, 0.6);
            transform: translateY(-2px);
        }

        /* Related Articles */
        .related-section {
            padding: 48px 0 64px;
            border-top: 1px solid rgba(255, 255, 255, 0.06);
        }

        .related-section h4 {
            font-size: 1.5rem;
            font-weight: 700;
            margin-bottom: 32px;
            color: var(--text-primary);
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
            gap: 24px;
        }

        .related-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            padding: 24px;
            text-decoration: none;
            color: var(--text-primary);
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

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

        .related-card .card-cat {
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.6px;
            color: var(--accent-secondary);
        }

        .related-card h5 {
            font-size: 1.1rem;
            font-weight: 700;
            line-height: 1.4;
        }

        .related-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Not Found State */
        .not-found-state {
            padding: 80px 0;
            text-align: center;
        }

        .not-found-state i {
            font-size: 4rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            display: block;
        }

        .not-found-state h2 {
            font-size: 1.8rem;
            margin-bottom: 12px;
        }

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

        .not-found-state .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--button-gradient);
            color: #FFFFFF;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            text-decoration: none;
            box-shadow: var(--shadow-button);
            transition: all 0.3s;
        }

        .not-found-state .btn-primary:hover {
            box-shadow: 0 0 30px rgba(0, 240, 255, 0.5);
        }

        /* FAB */
        .fab-support {
            position: fixed;
            left: 20px;
            bottom: 96px;
            z-index: 50;
            width: 56px;
            height: 56px;
            border-radius: 50px;
            background: rgba(10, 14, 23, 0.7);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 18px rgba(0, 240, 255, 0.45);
            transition: all 0.3s ease;
            text-decoration: none;
            color: var(--accent-secondary);
            font-size: 1.5rem;
            opacity: 0.7;
            animation: fabFloat 3s infinite ease-in-out;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50px;
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            z-index: -1;
            filter: blur(6px);
            opacity: 0.6;
        }

        .fab-support:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(0, 240, 255, 0.8);
        }

        .fab-support .badge-dot {
            position: absolute;
            top: 4px;
            right: 4px;
            width: 12px;
            height: 12px;
            background: #FF0055;
            border-radius: 50%;
            border: 2px solid rgba(10, 14, 23, 0.9);
            animation: blinkDot 1.4s infinite;
        }

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

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

        /* Footer */
        footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(0, 82, 255, 0.2);
            padding: 56px 0 28px;
            margin-top: auto;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .logo {
            font-size: 1.35rem;
            margin-bottom: 12px;
            display: inline-flex;
        }

        .footer-brand p {
            color: var(--text-muted);
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-col h5 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 14px;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .footer-col a {
            display: block;
            color: var(--text-muted);
            text-decoration: none;
            margin-bottom: 8px;
            font-size: 0.9rem;
            transition: color 0.2s;
        }

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

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .footer-badges {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .footer-badges i {
            color: var(--accent-secondary);
            font-size: 0.9rem;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }
            .mobile-toggle {
                display: block;
            }
            .nav-links {
                position: fixed;
                top: 0;
                left: 0;
                width: 100%;
                height: 100vh;
                background: rgba(10, 14, 23, 0.96);
                backdrop-filter: blur(30px);
                -webkit-backdrop-filter: blur(30px);
                flex-direction: column;
                align-items: center;
                justify-content: center;
                gap: 20px;
                opacity: 0;
                visibility: hidden;
                transition: all 0.35s ease;
                z-index: 100;
            }
            .nav-links.active {
                opacity: 1;
                visibility: visible;
            }
            .nav-links a {
                font-size: 1.2rem;
                padding: 12px 24px;
            }
            .nav-actions .btn-login,
            .nav-actions .btn-signup {
                font-size: 0.8rem;
                padding: 8px 14px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .article-hero h1 {
                font-size: 1.7rem;
            }
            .article-content {
                font-size: 1rem;
            }
        }

        @media (max-width: 520px) {
            .nav-actions {
                gap: 6px;
            }
            .btn-signup {
                padding: 8px 14px;
                font-size: 0.82rem;
            }
            .btn-login {
                padding: 7px 12px;
                font-size: 0.82rem;
            }
            .header-inner {
                height: 64px;
            }
            .fab-support {
                left: 12px;
                bottom: 80px;
                width: 48px;
                height: 48px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-deep: #08090F;
            --bg-card: #0D111E;
            --accent: #0052FF;
            --accent-glow: #00F0FF;
            --text-primary: #FFFFFF;
            --text-muted: #CBD5E1;
            --border-subtle: rgba(0, 240, 255, 0.2);
            --shadow-glow: 0 0 15px rgba(0, 240, 255, 0.5);
            --radius-lg: 1rem;
            --radius-md: 0.75rem;
            --transition-fast: 0.2s ease;
            --transition-smooth: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Segoe UI', 'Inter', system-ui, -apple-system, sans-serif;
            background-color: var(--bg-deep);
            color: var(--text-primary);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

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

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

        /* Header & Navigation */
        header {
            background: rgba(8, 9, 15, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border-subtle);
            position: sticky;
            top: 0;
            z-index: 1030;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }

        .logo {
            font-size: 1.35rem;
            font-weight: 700;
            letter-spacing: -0.3px;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }

        .logo i {
            color: var(--accent-glow);
            font-size: 1.5rem;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2rem;
        }

        .nav-links a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-muted);
            padding: 0.4rem 0;
            border-bottom: 2px solid transparent;
            transition: all var(--transition-fast);
        }

        .nav-links a:hover,
        .nav-links a.active {
            color: var(--text-primary);
            border-bottom-color: var(--accent-glow);
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 1rem;
        }

        .btn-login {
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.3);
            color: var(--text-primary);
            padding: 0.5rem 1.4rem;
            border-radius: 2rem;
            font-weight: 600;
            font-size: 0.9rem;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

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

        .btn-signup {
            background: var(--accent);
            border: none;
            color: #fff;
            padding: 0.5rem 1.6rem;
            border-radius: 2rem;
            font-weight: 700;
            font-size: 0.9rem;
            cursor: pointer;
            box-shadow: 0 0 10px rgba(0, 82, 255, 0.4);
            transition: all var(--transition-fast);
        }

        .btn-signup:hover {
            background: #0040cc;
            box-shadow: 0 0 18px rgba(0, 82, 255, 0.7);
            transform: translateY(-1px);
        }

        /* Hero Banner */
        .category-hero {
            background: linear-gradient(135deg, #08090F 0%, #0D111E 70%), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            background-blend-mode: overlay;
            padding: 5rem 0 4rem;
            position: relative;
            border-bottom: 1px solid var(--border-subtle);
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: radial-gradient(circle at 30% 40%, rgba(0, 240, 255, 0.08) 0%, transparent 60%);
            pointer-events: none;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 3rem;
            align-items: center;
        }

        .hero-text h1 {
            font-size: 2.8rem;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 1.5rem;
            background: linear-gradient(to right, #FFFFFF, #00F0FF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-text p {
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 2rem;
            max-width: 540px;
        }

        .hero-badges {
            display: flex;
            gap: 1.2rem;
            flex-wrap: wrap;
        }

        .hero-badges span {
            background: rgba(0, 240, 255, 0.1);
            border: 1px solid rgba(0, 240, 255, 0.3);
            padding: 0.5rem 1.2rem;
            border-radius: 2rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-glow);
        }

        .hero-visual {
            background: rgba(255,255,255,0.02);
            backdrop-filter: blur(10px);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-subtle);
            padding: 1.5rem;
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }

        .countdown-timer {
            background: rgba(0,0,0,0.4);
            border-radius: var(--radius-md);
            padding: 1rem;
            text-align: center;
            font-weight: 700;
            font-size: 1.2rem;
            color: var(--accent-glow);
        }

        .btn-hero-group {
            display: flex;
            gap: 1rem;
            flex-wrap: wrap;
        }

        .btn-hero-primary {
            background: var(--accent);
            color: #fff;
            border: none;
            padding: 0.8rem 2rem;
            border-radius: 2.5rem;
            font-weight: 700;
            font-size: 1rem;
            box-shadow: 0 0 14px rgba(0,82,255,0.5);
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .btn-hero-outline {
            background: transparent;
            border: 1px solid var(--accent-glow);
            color: var(--accent-glow);
            padding: 0.8rem 2rem;
            border-radius: 2.5rem;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition-fast);
            cursor: pointer;
        }

        .btn-hero-primary:hover { background: #003bb5; transform: scale(1.03); }
        .btn-hero-outline:hover { background: rgba(0,240,255,0.1); }

        /* Main Content Sections */
        section {
            padding: 4.5rem 0;
        }

        .section-label {
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.85rem;
            color: var(--accent-glow);
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        h2 {
            font-size: 2.2rem;
            font-weight: 750;
            line-height: 1.3;
            margin-bottom: 1rem;
        }

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

        .grid-2 {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 2rem;
        }

        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 2rem;
        }

        .review-card {
            background: rgba(13, 17, 30, 0.7);
            backdrop-filter: blur(8px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 2rem 1.8rem;
            transition: all var(--transition-smooth);
        }

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

        .review-card .icon-box {
            font-size: 2rem;
            color: var(--accent-glow);
            margin-bottom: 1.2rem;
        }

        .review-card h3 {
            font-size: 1.35rem;
            font-weight: 700;
            margin-bottom: 0.8rem;
        }

        .process-steps {
            display: flex;
            flex-direction: column;
            gap: 2rem;
        }

        .step-item {
            display: flex;
            gap: 1.5rem;
            align-items: flex-start;
        }

        .step-number {
            background: var(--accent);
            color: #fff;
            width: 48px;
            height: 48px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.3rem;
            flex-shrink: 0;
        }

        .step-desc h4 {
            font-weight: 700;
            font-size: 1.2rem;
            margin-bottom: 0.4rem;
        }

        .faq-block {
            background: rgba(13, 17, 30, 0.6);
            border-radius: var(--radius-lg);
            padding: 2rem;
        }

        .faq-item {
            border-bottom: 1px solid rgba(255,255,255,0.08);
            padding: 1.2rem 0;
        }

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

        .faq-question {
            font-weight: 700;
            font-size: 1.1rem;
            margin-bottom: 0.4rem;
            color: var(--accent-glow);
        }

        .cta-banner {
            background: linear-gradient(135deg, #0052FF, #00F0FF);
            border-radius: var(--radius-lg);
            padding: 3.5rem 2.5rem;
            text-align: left;
            color: #000;
        }

        .cta-banner h2 { color: #000; }
        .btn-dark {
            background: #08090F;
            color: #fff;
            border: none;
            padding: 0.8rem 2.2rem;
            border-radius: 2.5rem;
            font-weight: 700;
            margin-top: 1.2rem;
            cursor: pointer;
            transition: 0.3s;
        }
        .btn-dark:hover { background: #1a1f2e; }

        /* Footer */
        footer {
            background: #06070D;
            border-top: 1px solid var(--border-subtle);
            padding: 3rem 0 2rem;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 2.5rem;
        }

        .footer-brand .logo { margin-bottom: 1rem; display: inline-flex; }
        .footer-brand p { color: var(--text-muted); }
        .footer-col h5 { font-weight: 700; margin-bottom: 1rem; color: var(--accent-glow); }
        .footer-col a { display: block; color: var(--text-muted); margin-bottom: 0.6rem; transition: 0.2s; }
        .footer-col a:hover { color: #fff; }
        .footer-bottom { margin-top: 2.5rem; padding-top: 1.5rem; border-top: 1px solid rgba(255,255,255,0.07); display: flex; justify-content: space-between; flex-wrap: wrap; color: var(--text-muted); }
        .footer-badges i { margin: 0 0.2rem; }

        /* FAB */
        .fab-left {
            position: fixed;
            left: 1.2rem;
            bottom: 6rem;
            z-index: 1050;
            background: rgba(0,0,0,0.65);
            backdrop-filter: blur(12px);
            width: 54px;
            height: 54px;
            border-radius: 50px;
            display: flex;
            align-items: center;
            justify-content: center;
            border: 2px solid transparent;
            background-clip: padding-box;
            box-shadow: 0 0 15px rgba(0,240,255,0.5);
            transition: 0.35s;
            color: var(--accent-glow);
            font-size: 1.5rem;
            cursor: pointer;
        }

        .fab-left:hover {
            box-shadow: 0 0 24px rgba(0,240,255,0.9);
            transform: scale(1.1);
        }

        @media (max-width: 992px) {
            .hero-content { grid-template-columns: 1fr; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-container { flex-wrap: wrap; height: auto; padding: 1rem 0; }
            .nav-links { gap: 1.2rem; }
            .header-actions { margin-top: 0.6rem; }
            h1 { font-size: 2rem; }
            h2 { font-size: 1.7rem; }
            .footer-bottom { flex-direction: column; gap: 0.8rem; }
        }