/* roulang page: index */
:root {
            --bg-primary: #030712;
            --bg-secondary: #081229;
            --bg-card: rgba(14, 22, 48, 0.72);
            --bg-card-hover: rgba(20, 32, 64, 0.88);
            --accent-blue: #2563EB;
            --accent-cyan: #38BDF8;
            --accent-glow: rgba(37, 99, 235, 0.45);
            --accent-cyan-glow: rgba(56, 189, 248, 0.35);
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(56, 189, 248, 0.18);
            --border-card: rgba(37, 99, 235, 0.28);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
            --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(3, 7, 18, 0.96);
            border-bottom-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }

        .nav-logo span.logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .nav-logo .logo-main {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .nav-logo .logo-sub {
            font-size: 0.65rem;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.12);
        }

        .nav-links li a.active {
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.25);
        }

        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .btn-nav-login {
            padding: 8px 16px;
            font-size: 0.8rem;
            font-weight: 600;
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.35);
            border-radius: 10px;
            background: transparent;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-login:hover {
            background: rgba(56, 189, 248, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
        }

        .btn-nav-signup {
            padding: 8px 20px;
            font-size: 0.8rem;
            font-weight: 700;
            color: #FFFFFF;
            background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
            border-radius: 10px;
            border: 1px solid rgba(37, 99, 235, 0.5);
            box-shadow: 0 0 16px rgba(37, 99, 235, 0.35);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-signup:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-blue));
            box-shadow: 0 0 26px rgba(37, 99, 235, 0.55);
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            width: 40px;
            height: 40px;
            border-radius: 10px;
            border: 1px solid rgba(56, 189, 248, 0.3);
            background: rgba(14, 22, 48, 0.6);
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            transition: all var(--transition-base);
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ HERO ============ */
        .hero {
            padding: calc(var(--nav-height) + 48px) 0 60px;
            position: relative;
            min-height: 520px;
            display: flex;
            align-items: center;
            background-image: linear-gradient(rgba(3, 7, 18, 0.75), rgba(3, 7, 18, 0.88)), url('/assets/images/c1cabd3588917576.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            border-bottom: 1px solid rgba(37, 99, 235, 0.18);
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(transparent, var(--bg-primary));
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr;
            gap: 36px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

        .hero-content {
            text-align: center;
            max-width: 820px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 16px;
            border-radius: 50px;
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid rgba(56, 189, 248, 0.3);
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
            margin-bottom: 18px;
            text-transform: uppercase;
        }

        .hero-badge .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: var(--accent-cyan);
            animation: pulseDot 2s infinite;
        }

        @keyframes pulseDot {
            0%, 100% { box-shadow: 0 0 0 0 rgba(56, 189, 248, 0.6); }
            50% { box-shadow: 0 0 0 6px rgba(56, 189, 248, 0); }
        }

        .hero h1 {
            font-size: 2.4rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            margin-bottom: 18px;
            color: var(--text-primary);
            text-shadow: 0 0 40px rgba(37, 99, 235, 0.3);
        }

        .hero h1 .gradient-text {
            background: linear-gradient(135deg, var(--accent-cyan), var(--accent-blue));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 680px;
            margin: 0 auto 28px;
            line-height: 1.65;
        }

        .hero-search-wrap {
            max-width: 580px;
            margin: 0 auto 26px;
            display: flex;
            align-items: center;
            gap: 0;
            background: rgba(14, 22, 48, 0.8);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 60px;
            padding: 4px;
            box-shadow: var(--shadow-glow);
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .hero-search-wrap:focus-within {
            border-color: var(--accent-cyan);
            box-shadow: 0 0 32px rgba(56, 189, 248, 0.4);
        }

        .hero-search-wrap input {
            flex: 1;
            background: transparent;
            border: none;
            outline: none;
            padding: 12px 20px;
            font-size: 0.9rem;
            color: var(--text-primary);
            min-width: 0;
        }

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

        .hero-search-btn {
            padding: 10px 22px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            white-space: nowrap;
            box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
            transition: all var(--transition-base);
        }

        .hero-search-btn:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-blue));
            box-shadow: 0 0 30px rgba(37, 99, 235, 0.6);
            transform: translateY(-1px);
        }

        .hero-quick-tags {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: center;
            gap: 10px;
            margin-top: 4px;
        }

        .hero-quick-tags span.tag-label {
            font-size: 0.72rem;
            font-weight: 600;
            color: var(--text-secondary);
            text-transform: uppercase;
            letter-spacing: 0.06em;
        }

        .hero-quick-tags a {
            padding: 6px 14px;
            border-radius: 50px;
            background: rgba(14, 22, 48, 0.65);
            border: 1px solid rgba(37, 99, 235, 0.3);
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--text-holo);
            transition: all var(--transition-base);
        }

        .hero-quick-tags a:hover {
            background: rgba(37, 99, 235, 0.15);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
        }

        .hero-btn-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            justify-content: center;
            margin-top: 8px;
        }

        .btn-primary {
            padding: 14px 32px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
            font-size: 0.95rem;
            font-weight: 700;
            color: #fff;
            box-shadow: 0 0 28px rgba(37, 99, 235, 0.45);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary:hover {
            background: linear-gradient(135deg, #3B82F6, var(--accent-blue));
            box-shadow: 0 0 40px rgba(37, 99, 235, 0.65);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline {
            padding: 14px 28px;
            border-radius: 50px;
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.4);
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--accent-cyan);
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-outline:hover {
            background: rgba(56, 189, 248, 0.1);
            border-color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
            color: var(--accent-cyan);
        }

        /* ============ SECTIONS ============ */
        .section {
            padding: 56px 0;
            position: relative;
        }

        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(37, 99, 235, 0.1);
            border-bottom: 1px solid rgba(37, 99, 235, 0.1);
        }

        .section-header {
            margin-bottom: 36px;
        }

        .section-header .section-label {
            display: inline-block;
            padding: 5px 14px;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.08);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: 50px;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 1.75rem;
            font-weight: 700;
            letter-spacing: -0.015em;
            color: var(--text-primary);
            margin-bottom: 10px;
            line-height: 1.25;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            max-width: 640px;
            line-height: 1.6;
        }

        /* ============ STATS BAR ============ */
        .stats-bar {
            background: rgba(14, 22, 48, 0.7);
            border: 1px solid rgba(37, 99, 235, 0.2);
            border-radius: var(--radius-lg);
            padding: 28px 32px;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 20px;
            box-shadow: var(--shadow-card);
        }

        .stat-item {
            text-align: center;
        }

        .stat-item .stat-number {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
            line-height: 1.2;
        }

        .stat-item .stat-label {
            font-size: 0.8rem;
            color: var(--text-secondary);
            margin-top: 4px;
            font-weight: 500;
        }

        /* ============ CATEGORY MATRIX ============ */
        .category-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 20px;
        }

        .category-card {
            background: var(--bg-card);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 26px 22px;
            transition: all var(--transition-smooth);
            display: block;
            position: relative;
            overflow: hidden;
        }

        .category-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .category-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.45);
            box-shadow: var(--shadow-glow);
            transform: translateY(-3px);
        }

        .category-card:hover::before {
            opacity: 1;
        }

        .category-card .cat-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid rgba(37, 99, 235, 0.3);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            margin-bottom: 16px;
        }

        .category-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 8px;
            line-height: 1.35;
        }

        .category-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.55;
            margin-bottom: 14px;
        }

        .category-card .cat-link {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-base);
        }

        .category-card:hover .cat-link {
            gap: 9px;
        }

        /* ============ CONTENT CARDS / CMS ============ */
        .content-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 18px;
        }

        .content-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .content-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.4);
            box-shadow: var(--shadow-glow);
            transform: translateY(-4px);
        }

        .content-card .card-img {
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            display: block;
        }

        .content-card .card-body {
            padding: 18px 18px 20px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .content-card .card-category {
            font-size: 0.68rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }

        .content-card .card-title {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card .card-excerpt {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.55;
            flex: 1;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .content-card .card-meta {
            font-size: 0.7rem;
            color: var(--text-holo);
            margin-top: 12px;
            padding-top: 10px;
            border-top: 1px solid rgba(37, 99, 235, 0.12);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .content-card .card-link-wrap {
            margin-top: 12px;
        }

        .content-card .card-link {
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            display: inline-flex;
            align-items: center;
            gap: 5px;
            transition: gap var(--transition-base);
        }

        .content-card:hover .card-link {
            gap: 8px;
        }

        /* ============ RANKING LIST ============ */
        .ranking-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }

        .ranking-panel {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 24px;
        }

        .ranking-panel h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
            padding-bottom: 10px;
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
        }

        .rank-list {
            list-style: none;
        }

        .rank-list li {
            display: flex;
            align-items: center;
            gap: 14px;
            padding: 12px 0;
            border-bottom: 1px solid rgba(37, 99, 235, 0.08);
            transition: background var(--transition-base);
            border-radius: 6px;
            padding-left: 8px;
            padding-right: 8px;
        }

        .rank-list li:hover {
            background: rgba(37, 99, 235, 0.06);
        }

        .rank-list li:last-child {
            border-bottom: none;
        }

        .rank-num {
            width: 28px;
            height: 28px;
            border-radius: 8px;
            background: rgba(37, 99, 235, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.8rem;
            font-weight: 700;
            color: var(--accent-cyan);
            flex-shrink: 0;
        }

        .rank-num.top1 {
            background: rgba(245, 158, 11, 0.2);
            color: #F59E0B;
            box-shadow: 0 0 12px rgba(245, 158, 11, 0.3);
        }
        .rank-num.top2 {
            background: rgba(148, 163, 184, 0.15);
            color: #CBD5E1;
        }
        .rank-num.top3 {
            background: rgba(234, 88, 12, 0.18);
            color: #EA580C;
        }

        .rank-info {
            flex: 1;
            min-width: 0;
        }
        .rank-info .rank-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-info .rank-desc {
            font-size: 0.72rem;
            color: var(--text-secondary);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .rank-badge {
            font-size: 0.65rem;
            font-weight: 700;
            padding: 4px 10px;
            border-radius: 50px;
            background: rgba(37, 99, 235, 0.12);
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.25);
            white-space: nowrap;
        }

        /* ============ RESOURCE CENTER ============ */
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }

        .resource-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 18px 16px;
            text-align: left;
            transition: all var(--transition-base);
            display: flex;
            align-items: center;
            gap: 12px;
            cursor: pointer;
        }

        .resource-item:hover {
            border-color: rgba(56, 189, 248, 0.4);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-2px);
        }

        .resource-item .res-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: rgba(37, 99, 235, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
        }
        .resource-item .res-info h4 {
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 2px;
        }
        .resource-item .res-info p {
            font-size: 0.7rem;
            color: var(--text-secondary);
        }

        /* ============ CAPABILITY MATRIX ============ */
        .cap-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 16px;
        }

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

        .cap-item:hover {
            border-color: rgba(56, 189, 248, 0.35);
            box-shadow: var(--shadow-cyan-glow);
        }

        .cap-item .cap-icon {
            font-size: 1.3rem;
            margin-bottom: 10px;
            display: block;
        }
        .cap-item h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .cap-item p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ============ PRICE COMPARISON ============ */
        .price-compare {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 22px;
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }

        .compare-col {
            padding: 20px;
            border-radius: var(--radius-md);
            background: rgba(14, 22, 48, 0.5);
            border: 1px solid rgba(37, 99, 235, 0.15);
        }

        .compare-col.highlight {
            border-color: rgba(56, 189, 248, 0.4);
            background: rgba(37, 99, 235, 0.08);
            box-shadow: var(--shadow-glow);
        }

        .compare-col h4 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .compare-col .compare-price {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            margin-bottom: 6px;
        }
        .compare-col .compare-note {
            font-size: 0.78rem;
            color: var(--text-secondary);
            margin-bottom: 14px;
        }
        .compare-col ul {
            list-style: none;
            margin-bottom: 16px;
        }
        .compare-col ul li {
            font-size: 0.8rem;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: flex-start;
            gap: 8px;
        }
        .compare-col ul li::before {
            content: '✓';
            color: var(--accent-cyan);
            font-weight: 700;
            flex-shrink: 0;
        }
        .compare-col ul li.x::before {
            content: '✗';
            color: #EF4444;
        }

        .btn-compare {
            padding: 10px 22px;
            border-radius: 50px;
            font-size: 0.8rem;
            font-weight: 700;
            background: rgba(37, 99, 235, 0.15);
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.35);
            transition: all var(--transition-base);
            display: inline-block;
        }

        .btn-compare:hover {
            background: rgba(37, 99, 235, 0.28);
            box-shadow: var(--shadow-glow);
            color: #fff;
        }

        .compare-col.highlight .btn-compare {
            background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
            color: #fff;
            border-color: var(--accent-blue);
            box-shadow: 0 0 20px rgba(37, 99, 235, 0.4);
        }

        /* ============ SECURITY / TRUST ============ */
        .security-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 18px;
        }

        .security-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 22px 18px;
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: all var(--transition-base);
        }

        .security-item:hover {
            border-color: rgba(56, 189, 248, 0.35);
            box-shadow: var(--shadow-cyan-glow);
        }
        .security-item .sec-icon {
            font-size: 1.4rem;
            flex-shrink: 0;
        }
        .security-item h4 {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }
        .security-item p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* ============ TAG CLOUD ============ */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        .tag-cloud a {
            padding: 7px 16px;
            border-radius: 50px;
            background: rgba(14, 22, 48, 0.6);
            border: 1px solid rgba(37, 99, 235, 0.25);
            font-size: 0.78rem;
            font-weight: 500;
            color: var(--text-holo);
            transition: all var(--transition-base);
        }
        .tag-cloud a:hover {
            background: rgba(37, 99, 235, 0.15);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            box-shadow: var(--shadow-cyan-glow);
        }

        /* ============ BOOKMARK / COLLECTION ============ */
        .bookmark-banner {
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.18), rgba(56, 189, 248, 0.08));
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: var(--radius-lg);
            padding: 36px 32px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-card);
        }

        .bookmark-banner .bm-text h3 {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .bookmark-banner .bm-text p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            max-width: 500px;
        }
        .bookmark-banner .bm-actions {
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }

        /* ============ FAQ ============ */
        .faq-list {
            max-width: 780px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.3);
        }
        .faq-item .faq-q {
            padding: 18px 22px;
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--text-primary);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 14px;
            transition: color var(--transition-base);
        }
        .faq-item .faq-q:hover {
            color: var(--accent-cyan);
        }
        .faq-item .faq-q .faq-arrow {
            font-size: 1.2rem;
            color: var(--accent-cyan);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item.open .faq-q .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-item .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth);
            padding: 0 22px;
        }
        .faq-item.open .faq-a {
            max-height: 300px;
            padding: 0 22px 18px;
        }
        .faq-item .faq-a p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            padding: 60px 0;
            text-align: center;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.12), rgba(56, 189, 248, 0.06));
            border-top: 1px solid rgba(37, 99, 235, 0.18);
            border-bottom: 1px solid rgba(37, 99, 235, 0.18);
        }
        .cta-section h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            margin-bottom: 10px;
        }
        .cta-section p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            max-width: 560px;
            margin: 0 auto 24px;
        }
        .cta-section .btn-group {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ FLOATING CTA BAR ============ */
        .floating-cta {
            position: fixed;
            bottom: 20px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 900;
            background: rgba(3, 7, 18, 0.9);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(56, 189, 248, 0.35);
            border-radius: 50px;
            padding: 10px 20px;
            display: flex;
            align-items: center;
            gap: 14px;
            box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), var(--shadow-glow);
            transition: all var(--transition-base);
        }
        .floating-cta .fc-text {
            font-size: 0.78rem;
            color: var(--text-secondary);
            white-space: nowrap;
        }
        .floating-cta .fc-btn {
            padding: 8px 18px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 700;
            background: linear-gradient(135deg, var(--accent-blue), #1D4ED8);
            color: #fff;
            box-shadow: 0 0 16px rgba(37, 99, 235, 0.35);
            transition: all var(--transition-base);
            white-space: nowrap;
        }
        .floating-cta .fc-btn:hover {
            box-shadow: 0 0 26px rgba(37, 99, 235, 0.55);
            transform: translateY(-1px);
        }

        /* ============ FAB ============ */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 850;
            width: 56px;
            height: 56px;
            border-radius: 16px;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid rgba(56, 189, 248, 0.5);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            box-shadow: 0 0 22px rgba(6, 182, 212, 0.5);
            transition: all var(--transition-base);
            animation: fabPulse 3s infinite;
            font-size: 1.4rem;
            color: var(--accent-cyan);
        }
        .fab:hover {
            transform: scale(1.1);
            box-shadow: 0 0 34px rgba(6, 182, 212, 0.7);
            border-color: #F43F5E;
            color: #F43F5E;
        }
        .fab:active {
            transform: scale(0.94);
        }
        .fab .fab-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background: #F43F5E;
            border: 2px solid #fff;
            animation: badgePulse 2s infinite;
        }
        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 18px rgba(6, 182, 212, 0.4); }
            50% { box-shadow: 0 0 30px rgba(6, 182, 212, 0.65); }
        }
        @keyframes badgePulse {
            0%, 100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.6); }
            50% { box-shadow: 0 0 0 5px rgba(244, 63, 94, 0); }
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid rgba(37, 99, 235, 0.15);
            padding: 40px 0 20px;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 28px;
            margin-bottom: 28px;
        }
        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            font-size: 0.78rem;
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }
        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }
        .footer-col p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }
        .footer-brand {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            display: block;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            border-top: 1px solid rgba(37, 99, 235, 0.12);
            padding-top: 18px;
            text-align: center;
            font-size: 0.72rem;
            color: var(--text-secondary);
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }
        .footer-bottom a {
            color: var(--text-holo);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero h1 {
                font-size: 2rem;
            }
            .ranking-wrap {
                grid-template-columns: 1fr;
            }
            .price-compare {
                grid-template-columns: 1fr;
                padding: 24px;
            }
            .bookmark-banner {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 64px;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(3, 7, 18, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                padding: 18px 24px;
                gap: 4px;
                border-bottom: 1px solid rgba(37, 99, 235, 0.2);
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                z-index: 999;
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 0.9rem;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-nav-login {
                padding: 6px 12px;
                font-size: 0.7rem;
            }
            .btn-nav-signup {
                padding: 6px 14px;
                font-size: 0.7rem;
            }
            .hero {
                padding: calc(var(--nav-height) + 32px) 0 40px;
                min-height: 480px;
            }
            .hero h1 {
                font-size: 1.6rem;
            }
            .hero-subtitle {
                font-size: 0.9rem;
            }
            .hero-search-btn {
                padding: 10px 16px;
                font-size: 0.75rem;
            }
            .section {
                padding: 38px 0;
            }
            .section-header h2 {
                font-size: 1.4rem;
            }
            .stats-bar {
                padding: 20px;
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-item .stat-number {
                font-size: 1.5rem;
            }
            .content-grid {
                grid-template-columns: 1fr;
            }
            .category-grid {
                grid-template-columns: 1fr 1fr;
            }
            .resource-grid {
                grid-template-columns: 1fr 1fr;
            }
            .cap-grid {
                grid-template-columns: 1fr 1fr;
            }
            .security-grid {
                grid-template-columns: 1fr;
            }
            .floating-cta {
                bottom: 12px;
                padding: 8px 14px;
                gap: 8px;
                border-radius: 40px;
                max-width: 95vw;
            }
            .floating-cta .fc-text {
                font-size: 0.65rem;
            }
            .floating-cta .fc-btn {
                padding: 6px 12px;
                font-size: 0.68rem;
            }
            .fab {
                width: 48px;
                height: 48px;
                bottom: 80px;
                left: 12px;
                border-radius: 14px;
                font-size: 1.2rem;
            }
            .btn-primary, .btn-outline {
                padding: 12px 22px;
                font-size: 0.85rem;
            }
            .compare-col {
                padding: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 20px;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-logo .logo-main {
                font-size: 0.8rem;
            }
            .nav-logo .logo-sub {
                font-size: 0.6rem;
            }
            .hero h1 {
                font-size: 1.35rem;
            }
            .hero-badge {
                font-size: 0.68rem;
                padding: 5px 12px;
            }
            .hero-search-btn {
                padding: 8px 12px;
                font-size: 0.7rem;
            }
            .hero-search-wrap input {
                padding: 10px 14px;
                font-size: 0.8rem;
            }
            .category-grid {
                grid-template-columns: 1fr;
            }
            .resource-grid {
                grid-template-columns: 1fr;
            }
            .cap-grid {
                grid-template-columns: 1fr;
            }
            .stats-bar {
                grid-template-columns: 1fr 1fr;
                padding: 16px;
                gap: 12px;
            }
            .stat-item .stat-number {
                font-size: 1.3rem;
            }
            .section-header h2 {
                font-size: 1.25rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 18px;
            }
            .hero-btn-group {
                flex-direction: column;
                align-items: center;
            }
            .btn-primary, .btn-outline {
                width: 100%;
                justify-content: center;
            }
            .floating-cta .fc-text {
                display: none;
            }
        }

/* roulang page: article */
:root {
        --bg-primary: #030712;
        --bg-secondary: #081229;
        --bg-card: rgba(14, 22, 48, 0.72);
        --bg-card-hover: rgba(20, 32, 64, 0.88);
        --accent-blue: #2563EB;
        --accent-cyan: #38BDF8;
        --accent-glow: rgba(37, 99, 235, 0.45);
        --accent-cyan-glow: rgba(56, 189, 248, 0.35);
        --text-primary: #F8FAFC;
        --text-secondary: #94A3B8;
        --text-holo: #60A5FA;
        --border-subtle: rgba(56, 189, 248, 0.18);
        --border-card: rgba(37, 99, 235, 0.28);
        --radius-sm: 8px;
        --radius-md: 14px;
        --radius-lg: 22px;
        --radius-xl: 28px;
        --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
        --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
        --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
        --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
        --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
        --max-width: 1200px;
        --nav-height: 72px;
    }

    @media (max-width: 768px) {
        :root {
            --nav-height: 64px;
        }
    }

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

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

    body {
        font-family: var(--font-sans);
        background-color: var(--bg-primary);
        color: var(--text-primary);
        line-height: 1.65;
        font-size: 16px;
        min-height: 100vh;
        overflow-x: hidden;
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        padding-top: var(--nav-height);
    }

    body::before {
        content: '';
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background:
            radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
            radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
            radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
        pointer-events: none;
        z-index: 0;
    }

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

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

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

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

    button {
        cursor: pointer;
        border: none;
        background: none;
        color: inherit;
    }

    .container {
        width: 100%;
        max-width: var(--max-width);
        margin: 0 auto;
        padding: 0 24px;
        position: relative;
        z-index: 1;
    }

    /* ============ HEADER / NAV ============ */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        z-index: 1000;
        height: var(--nav-height);
        background: rgba(3, 7, 18, 0.88);
        backdrop-filter: blur(18px);
        -webkit-backdrop-filter: blur(18px);
        border-bottom: 1px solid rgba(37, 99, 235, 0.15);
        transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
    }

    .site-header.scrolled {
        background: rgba(3, 7, 18, 0.96);
        border-bottom-color: rgba(56, 189, 248, 0.25);
        box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    }

    .nav-inner {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
        gap: 16px;
    }

    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-weight: 700;
        font-size: 1.05rem;
        color: var(--text-primary);
        white-space: nowrap;
        letter-spacing: -0.01em;
        flex-shrink: 0;
    }

    .nav-logo .logo-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.15rem;
        flex-shrink: 0;
        box-shadow: var(--shadow-glow);
    }

    .nav-logo span.logo-text {
        display: flex;
        flex-direction: column;
        line-height: 1.2;
    }

    .nav-logo .logo-main {
        font-size: 0.95rem;
        font-weight: 700;
        color: var(--text-primary);
    }

    .nav-logo .logo-sub {
        font-size: 0.65rem;
        font-weight: 500;
        color: var(--accent-cyan);
        letter-spacing: 0.03em;
    }

    .nav-links {
        display: flex;
        align-items: center;
        gap: 6px;
        list-style: none;
    }

    .nav-links li a {
        display: block;
        padding: 8px 14px;
        font-size: 0.85rem;
        font-weight: 500;
        color: var(--text-secondary);
        border-radius: 8px;
        transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
        white-space: nowrap;
    }

    .nav-links li a:hover {
        color: var(--text-primary);
        background: rgba(37, 99, 235, 0.12);
    }

    .nav-links li a.active {
        color: var(--accent-cyan);
        background: rgba(37, 99, 235, 0.16);
        box-shadow: inset 0 0 0 1px var(--border-card);
    }

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

    .btn-nav-login {
        padding: 8px 16px;
        font-size: 0.82rem;
        font-weight: 600;
        color: var(--text-holo);
        border: 1px solid rgba(56, 189, 248, 0.35);
        border-radius: 8px;
        transition: all var(--transition-base);
        white-space: nowrap;
    }

    .btn-nav-login:hover {
        border-color: var(--accent-cyan);
        color: var(--accent-cyan);
        background: rgba(56, 189, 248, 0.08);
    }

    .btn-nav-signup {
        padding: 8px 18px;
        font-size: 0.82rem;
        font-weight: 700;
        color: #fff;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        border-radius: 8px;
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-base);
        white-space: nowrap;
    }

    .btn-nav-signup:hover {
        box-shadow: 0 0 28px rgba(56, 189, 248, 0.5);
        transform: translateY(-1px);
        color: #fff;
    }

    .nav-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        padding: 8px;
        border-radius: 6px;
        width: 42px;
        height: 38px;
        align-items: center;
        justify-content: center;
    }

    .nav-toggle span {
        display: block;
        width: 22px;
        height: 2px;
        background: var(--text-primary);
        border-radius: 2px;
        transition: all var(--transition-base);
    }

    @media (max-width: 1024px) {
        .nav-links {
            gap: 2px;
        }
        .nav-links li a {
            padding: 8px 10px;
            font-size: 0.8rem;
        }
        .nav-actions {
            gap: 6px;
        }
        .btn-nav-login,
        .btn-nav-signup {
            padding: 7px 12px;
            font-size: 0.76rem;
        }
    }

    @media (max-width: 768px) {
        .nav-toggle {
            display: flex;
        }
        .nav-links {
            position: absolute;
            top: 100%;
            left: 0;
            right: 0;
            flex-direction: column;
            background: rgba(3, 7, 18, 0.98);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.2);
            padding: 12px 24px 20px;
            gap: 4px;
            max-height: 0;
            overflow: hidden;
            opacity: 0;
            transform: translateY(-8px);
            pointer-events: none;
            transition: all var(--transition-smooth);
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.5);
        }
        .nav-links.open {
            max-height: 420px;
            opacity: 1;
            transform: translateY(0);
            pointer-events: auto;
        }
        .nav-links li {
            width: 100%;
        }
        .nav-links li a {
            padding: 11px 14px;
            font-size: 0.9rem;
            width: 100%;
            display: block;
        }
        .nav-actions {
            margin-left: auto;
        }
        .btn-nav-login,
        .btn-nav-signup {
            display: block;
        }
    }

    @media (max-width: 520px) {
        .container {
            padding: 0 16px;
        }
        .nav-logo .logo-main {
            font-size: 0.8rem;
        }
        .nav-logo .logo-sub {
            font-size: 0.58rem;
        }
        .nav-logo .logo-icon {
            width: 30px;
            height: 30px;
            font-size: 0.95rem;
            border-radius: 8px;
        }
        .btn-nav-login {
            padding: 6px 10px;
            font-size: 0.7rem;
        }
        .btn-nav-signup {
            padding: 6px 12px;
            font-size: 0.7rem;
        }
    }

    /* ============ BREADCRUMB ============ */
    .breadcrumb-wrap {
        padding: 20px 0 8px;
        font-size: 0.78rem;
        color: var(--text-secondary);
    }

    .breadcrumb {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 6px;
        list-style: none;
    }

    .breadcrumb li {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .breadcrumb li + li::before {
        content: '›';
        color: var(--accent-cyan);
        font-size: 0.9rem;
        margin-right: 4px;
    }

    .breadcrumb a {
        color: var(--text-holo);
        transition: color var(--transition-base);
    }

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

    .breadcrumb .current {
        color: var(--text-primary);
        font-weight: 500;
    }

    /* ============ ARTICLE HERO ============ */
    .article-hero {
        padding: 28px 0 20px;
    }

    .article-hero .category-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 5px 14px;
        font-size: 0.72rem;
        font-weight: 700;
        letter-spacing: 0.05em;
        text-transform: uppercase;
        color: var(--accent-cyan);
        background: rgba(37, 99, 235, 0.14);
        border: 1px solid var(--border-subtle);
        border-radius: 99px;
        margin-bottom: 16px;
    }

    .article-hero h1 {
        font-size: 2.2rem;
        font-weight: 800;
        line-height: 1.25;
        color: var(--text-primary);
        letter-spacing: -0.02em;
        margin-bottom: 18px;
    }

    .article-meta {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 14px;
        font-size: 0.8rem;
        color: var(--text-secondary);
        padding-bottom: 18px;
        border-bottom: 1px solid var(--border-subtle);
    }

    .article-meta span {
        display: inline-flex;
        align-items: center;
        gap: 5px;
    }

    .article-meta .dot-sep {
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background: var(--accent-cyan);
        opacity: 0.6;
    }

    .article-meta .meta-icon {
        font-size: 0.85rem;
    }

    /* ============ ARTICLE FEATURED IMAGE ============ */
    .article-featured {
        margin: 22px 0 28px;
        border-radius: var(--radius-lg);
        overflow: hidden;
        border: 1px solid var(--border-subtle);
        box-shadow: var(--shadow-card);
        position: relative;
    }

    .article-featured img {
        width: 100%;
        height: auto;
        min-height: 260px;
        object-fit: cover;
        display: block;
    }

    .article-featured::after {
        content: '';
        position: absolute;
        bottom: 0;
        left: 0;
        right: 0;
        height: 120px;
        background: linear-gradient(to top, rgba(3, 7, 18, 0.75), transparent);
        pointer-events: none;
    }

    /* ============ ARTICLE LAYOUT ============ */
    .article-layout {
        display: grid;
        grid-template-columns: minmax(0, 1fr) 320px;
        gap: 32px;
        padding: 12px 0 36px;
        align-items: start;
    }

    @media (max-width: 991px) {
        .article-layout {
            grid-template-columns: 1fr;
            gap: 24px;
        }
    }

    /* ============ ARTICLE BODY ============ */
    .article-body {
        font-size: 1rem;
        color: var(--text-primary);
        line-height: 1.7;
    }

    .article-body h2 {
        font-size: 1.5rem;
        font-weight: 700;
        color: var(--text-primary);
        margin: 28px 0 14px;
        letter-spacing: -0.01em;
        line-height: 1.3;
    }

    .article-body h3 {
        font-size: 1.2rem;
        font-weight: 700;
        color: var(--text-primary);
        margin: 22px 0 12px;
        line-height: 1.3;
    }

    .article-body p {
        margin-bottom: 16px;
        color: var(--text-secondary);
    }

    .article-body ul,
    .article-body ol {
        margin: 0 0 18px 20px;
        color: var(--text-secondary);
    }

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

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

    .article-body blockquote {
        margin: 20px 0;
        padding: 16px 20px;
        background: rgba(37, 99, 235, 0.08);
        border-left: 3px solid var(--accent-cyan);
        border-radius: 0 var(--radius-md) var(--radius-md) 0;
        color: var(--text-holo);
        font-style: italic;
    }

    .article-body img {
        border-radius: var(--radius-md);
        margin: 18px 0;
        border: 1px solid var(--border-subtle);
    }

    .article-body code {
        font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
        font-size: 0.9rem;
        background: rgba(37, 99, 235, 0.1);
        padding: 2px 8px;
        border-radius: 4px;
        color: var(--accent-cyan);
    }

    .article-body pre {
        background: rgba(3, 7, 18, 0.9);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-md);
        padding: 18px;
        overflow-x: auto;
        margin: 18px 0;
        font-size: 0.85rem;
        line-height: 1.6;
    }

    .article-body pre code {
        background: none;
        padding: 0;
        color: var(--text-holo);
    }

    .article-body a {
        color: var(--accent-cyan);
        border-bottom: 1px dashed rgba(56, 189, 248, 0.4);
        transition: border-color var(--transition-base), color var(--transition-base);
    }

    .article-body a:hover {
        color: #7dd3fc;
        border-bottom-color: #7dd3fc;
    }

    .article-body hr {
        margin: 24px 0;
        border: none;
        height: 1px;
        background: var(--border-subtle);
    }

    /* ============ ARTICLE NOT FOUND ============ */
    .article-not-found {
        text-align: center;
        padding: 60px 24px;
        background: var(--bg-card);
        border: 1px solid var(--border-subtle);
        border-radius: var(--radius-lg);
        margin: 30px 0;
    }

    .article-not-found .nf-icon {
        font-size: 3rem;
        margin-bottom: 16px;
    }

    .article-not-found h2 {
        font-size: 1.5rem;
        font-weight: 700;
        margin-bottom: 10px;
        color: var(--text-primary);
    }

    .article-not-found p {
        color: var(--text-secondary);
        margin-bottom: 20px;
    }

    .btn-back-home {
        display: inline-block;
        padding: 12px 28px;
        font-weight: 700;
        font-size: 0.9rem;
        color: #fff;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-base);
    }

    .btn-back-home:hover {
        box-shadow: 0 0 30px rgba(56, 189, 248, 0.5);
        transform: translateY(-2px);
        color: #fff;
    }

    /* ============ SIDEBAR ============ */
    .article-sidebar {
        position: sticky;
        top: calc(var(--nav-height) + 24px);
        display: flex;
        flex-direction: column;
        gap: 20px;
    }

    @media (max-width: 991px) {
        .article-sidebar {
            position: static;
            top: auto;
        }
    }

    .sidebar-card {
        background: var(--bg-card);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-md);
        padding: 20px;
        box-shadow: var(--shadow-card);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        transition: border-color var(--transition-base), background var(--transition-base);
    }

    .sidebar-card:hover {
        border-color: rgba(56, 189, 248, 0.35);
        background: var(--bg-card-hover);
    }

    .sidebar-card h4 {
        font-size: 0.85rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--accent-cyan);
        margin-bottom: 14px;
        padding-bottom: 10px;
        border-bottom: 1px solid var(--border-subtle);
    }

    .sidebar-tools-list {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .sidebar-tools-list li a {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 0.82rem;
        font-weight: 500;
        color: var(--text-secondary);
        padding: 8px 10px;
        border-radius: 8px;
        transition: all var(--transition-base);
    }

    .sidebar-tools-list li a:hover {
        color: var(--text-primary);
        background: rgba(37, 99, 235, 0.12);
    }

    .sidebar-tools-list .tool-icon {
        font-size: 1rem;
        flex-shrink: 0;
    }

    .sidebar-cta-box {
        background: linear-gradient(145deg, rgba(37, 99, 235, 0.2), rgba(56, 189, 248, 0.08));
        border: 1px solid var(--border-card);
        border-radius: var(--radius-md);
        padding: 20px;
        text-align: left;
        box-shadow: var(--shadow-card);
    }

    .sidebar-cta-box h4 {
        font-size: 1rem;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
        text-transform: none;
        letter-spacing: 0;
        border-bottom: none;
        padding-bottom: 0;
    }

    .sidebar-cta-box p {
        font-size: 0.82rem;
        color: var(--text-secondary);
        margin-bottom: 14px;
        line-height: 1.55;
    }

    .btn-sidebar-cta {
        display: block;
        text-align: center;
        padding: 12px 20px;
        font-weight: 700;
        font-size: 0.85rem;
        color: #fff;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-base);
    }

    .btn-sidebar-cta:hover {
        box-shadow: 0 0 28px rgba(56, 189, 248, 0.5);
        transform: translateY(-1px);
        color: #fff;
    }

    /* ============ TOOL RECOMMENDATIONS ============ */
    .tools-section {
        padding: 40px 0 50px;
        border-top: 1px solid var(--border-subtle);
    }

    .section-header {
        display: flex;
        align-items: baseline;
        justify-content: space-between;
        gap: 16px;
        margin-bottom: 24px;
        flex-wrap: wrap;
    }

    .section-header h2 {
        font-size: 1.55rem;
        font-weight: 700;
        color: var(--text-primary);
        letter-spacing: -0.01em;
    }

    .section-header .section-link {
        font-size: 0.82rem;
        font-weight: 600;
        color: var(--accent-cyan);
        transition: all var(--transition-base);
    }

    .section-header .section-link:hover {
        color: #7dd3fc;
        text-decoration: underline;
    }

    .tools-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 18px;
    }

    @media (max-width: 1024px) {
        .tools-grid {
            grid-template-columns: repeat(3, 1fr);
        }
    }

    @media (max-width: 768px) {
        .tools-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 14px;
        }
    }

    @media (max-width: 520px) {
        .tools-grid {
            grid-template-columns: 1fr;
        }
    }

    .tool-card {
        background: var(--bg-card);
        border: 1px solid var(--border-card);
        border-radius: var(--radius-md);
        padding: 20px 18px;
        box-shadow: var(--shadow-card);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        transition: all var(--transition-smooth);
        display: flex;
        flex-direction: column;
    }

    .tool-card:hover {
        border-color: rgba(56, 189, 248, 0.45);
        background: var(--bg-card-hover);
        box-shadow: var(--shadow-cyan-glow), var(--shadow-card);
        transform: translateY(-3px);
    }

    .tool-card-icon {
        width: 42px;
        height: 42px;
        border-radius: 10px;
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(56, 189, 248, 0.15));
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.3rem;
        margin-bottom: 14px;
        border: 1px solid var(--border-subtle);
    }

    .tool-card h3 {
        font-size: 0.98rem;
        font-weight: 700;
        color: var(--text-primary);
        margin-bottom: 8px;
        line-height: 1.3;
    }

    .tool-card p {
        font-size: 0.8rem;
        color: var(--text-secondary);
        margin-bottom: 14px;
        flex-grow: 1;
        line-height: 1.55;
    }

    .tool-card .tool-tag {
        display: inline-block;
        font-size: 0.68rem;
        font-weight: 700;
        padding: 3px 10px;
        border-radius: 99px;
        background: rgba(56, 189, 248, 0.12);
        color: var(--accent-cyan);
        border: 1px solid var(--border-subtle);
        align-self: flex-start;
    }

    /* ============ CTA SECTION ============ */
    .cta-section {
        padding: 48px 0 60px;
    }

    .cta-box {
        background: linear-gradient(145deg, rgba(37, 99, 235, 0.22), rgba(8, 18, 41, 0.9));
        border: 1px solid var(--border-card);
        border-radius: var(--radius-lg);
        padding: 36px 28px;
        box-shadow: var(--shadow-card), var(--shadow-glow);
        position: relative;
        overflow: hidden;
    }

    .cta-box::before {
        content: '';
        position: absolute;
        top: -60px;
        right: -60px;
        width: 200px;
        height: 200px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(56, 189, 248, 0.2), transparent 70%);
        pointer-events: none;
    }

    .cta-box h2 {
        font-size: 1.6rem;
        font-weight: 800;
        color: var(--text-primary);
        margin-bottom: 10px;
        letter-spacing: -0.01em;
    }

    .cta-box p {
        font-size: 0.95rem;
        color: var(--text-secondary);
        margin-bottom: 20px;
        max-width: 560px;
        line-height: 1.6;
    }

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

    .btn-cta-primary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 13px 30px;
        font-weight: 700;
        font-size: 0.9rem;
        color: #fff;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        border-radius: var(--radius-sm);
        box-shadow: var(--shadow-glow);
        transition: all var(--transition-base);
    }

    .btn-cta-primary:hover {
        box-shadow: 0 0 34px rgba(56, 189, 248, 0.55);
        transform: translateY(-2px);
        color: #fff;
    }

    .btn-cta-secondary {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 13px 26px;
        font-weight: 600;
        font-size: 0.88rem;
        color: var(--text-holo);
        border: 1px solid rgba(56, 189, 248, 0.35);
        border-radius: var(--radius-sm);
        transition: all var(--transition-base);
        background: rgba(37, 99, 235, 0.08);
    }

    .btn-cta-secondary:hover {
        border-color: var(--accent-cyan);
        color: var(--accent-cyan);
        background: rgba(56, 189, 248, 0.1);
    }

    /* ============ FAQ ============ */
    .faq-section {
        padding: 40px 0 50px;
        border-top: 1px solid var(--border-subtle);
    }

    .faq-section .section-header h2 {
        font-size: 1.5rem;
    }

    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
        max-width: 820px;
    }

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

    .faq-item:hover {
        border-color: rgba(56, 189, 248, 0.35);
    }

    .faq-question {
        width: 100%;
        text-align: left;
        padding: 16px 20px;
        font-size: 0.92rem;
        font-weight: 600;
        color: var(--text-primary);
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        transition: all var(--transition-base);
    }

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

    .faq-icon {
        font-size: 1.1rem;
        color: var(--accent-cyan);
        transition: transform var(--transition-base);
        flex-shrink: 0;
    }

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

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height var(--transition-smooth);
    }

    .faq-answer-inner {
        padding: 0 20px 18px;
        font-size: 0.85rem;
        color: var(--text-secondary);
        line-height: 1.65;
    }

    .faq-item.open .faq-answer {
        max-height: 300px;
    }

    /* ============ FOOTER ============ */
    .site-footer {
        background: rgba(3, 7, 18, 0.95);
        border-top: 1px solid rgba(37, 99, 235, 0.15);
        padding: 48px 0 24px;
        position: relative;
        z-index: 1;
    }

    .footer-grid {
        display: grid;
        grid-template-columns: 1.8fr 1fr 1fr 1fr;
        gap: 32px;
        margin-bottom: 36px;
    }

    @media (max-width: 991px) {
        .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 24px;
        }
    }

    @media (max-width: 520px) {
        .footer-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
    }

    .footer-brand {
        font-size: 1.1rem;
        font-weight: 800;
        color: var(--text-primary);
        display: block;
        margin-bottom: 12px;
        letter-spacing: -0.01em;
    }

    .footer-brand span {
        color: var(--accent-cyan);
    }

    .footer-col p {
        font-size: 0.82rem;
        color: var(--text-secondary);
        line-height: 1.65;
    }

    .footer-col h4 {
        font-size: 0.82rem;
        font-weight: 700;
        text-transform: uppercase;
        letter-spacing: 0.06em;
        color: var(--text-holo);
        margin-bottom: 14px;
    }

    .footer-col ul {
        list-style: none;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .footer-col ul li a {
        font-size: 0.82rem;
        color: var(--text-secondary);
        transition: color var(--transition-base);
    }

    .footer-col ul li a:hover {
        color: var(--accent-cyan);
    }

    .footer-bottom {
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        gap: 10px;
        padding-top: 20px;
        border-top: 1px solid rgba(37, 99, 235, 0.12);
        font-size: 0.78rem;
        color: var(--text-secondary);
    }

    .footer-bottom a {
        color: var(--text-holo);
        transition: color var(--transition-base);
    }

    .footer-bottom a:hover {
        color: var(--accent-cyan);
    }

    /* ============ FAB ============ */
    .fab-support {
        position: fixed;
        left: 16px;
        bottom: 24px;
        z-index: 50;
        width: 56px;
        height: 56px;
        border-radius: 50%;
        background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
        border: 2px solid rgba(56, 189, 248, 0.6);
        box-shadow: 0 0 20px rgba(56, 189, 248, 0.45), 0 6px 24px rgba(0, 0, 0, 0.5);
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        color: #fff;
        cursor: pointer;
        opacity: 0.75;
        transition: all var(--transition-smooth);
        animation: fabFloat 3s ease-in-out infinite;
    }

    .fab-support:hover {
        opacity: 1;
        transform: scale(1.1);
        box-shadow: 0 0 34px rgba(56, 189, 248, 0.65), 0 8px 28px rgba(0, 0, 0, 0.5);
    }

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

    .fab-support .fab-badge {
        position: absolute;
        top: -2px;
        right: -2px;
        width: 14px;
        height: 14px;
        border-radius: 50%;
        background: #EF4444;
        border: 2px solid #fff;
        box-shadow: 0 0 10px rgba(239, 68, 68, 0.7);
        animation: pulseBadge 2s ease-in-out infinite;
    }

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

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

    /* ============ RESPONSIVE ============ */
    @media (max-width: 768px) {
        .article-hero h1 {
            font-size: 1.6rem;
        }
        .article-body {
            font-size: 0.94rem;
        }
        .article-body h2 {
            font-size: 1.3rem;
        }
        .article-body h3 {
            font-size: 1.1rem;
        }
        .cta-box {
            padding: 26px 20px;
        }
        .cta-box h2 {
            font-size: 1.3rem;
        }
        .section-header h2 {
            font-size: 1.3rem;
        }
    }

    @media (max-width: 520px) {
        .article-hero h1 {
            font-size: 1.35rem;
        }
        .article-meta {
            gap: 10px;
            font-size: 0.72rem;
        }
        .article-featured img {
            min-height: 180px;
        }
        .article-body {
            font-size: 0.9rem;
            line-height: 1.65;
        }
        .article-body h2 {
            font-size: 1.15rem;
        }
        .article-body h3 {
            font-size: 1rem;
        }
        .fab-support {
            width: 50px;
            height: 50px;
            font-size: 1.4rem;
            left: 12px;
            bottom: 18px;
        }
        .footer-bottom {
            flex-direction: column;
            align-items: flex-start;
            gap: 6px;
        }
    }

/* roulang page: category1 */
:root {
            --bg-primary: #030712;
            --bg-secondary: #081229;
            --bg-card: rgba(14, 22, 48, 0.72);
            --bg-card-hover: rgba(20, 32, 64, 0.88);
            --accent-blue: #2563EB;
            --accent-cyan: #38BDF8;
            --accent-glow: rgba(37, 99, 235, 0.45);
            --accent-cyan-glow: rgba(56, 189, 248, 0.35);
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(56, 189, 248, 0.18);
            --border-card: rgba(37, 99, 235, 0.28);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
            --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(3, 7, 18, 0.96);
            border-bottom-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }

        .nav-logo span.logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .nav-logo .logo-main {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .nav-logo .logo-sub {
            font-size: 0.65rem;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.12);
        }

        .nav-links li a.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.18);
            box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.3);
        }

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

        .btn-nav-login {
            padding: 8px 16px;
            font-size: 0.82rem;
            font-weight: 500;
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.4);
            border-radius: 8px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-login:hover {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }

        .btn-nav-signup {
            padding: 8px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-signup:hover {
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-1px);
            color: #fff;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: none;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ============ HERO ============ */
        .hero-section {
            position: relative;
            padding: calc(var(--nav-height) + 60px) 0 70px;
            background-image: url('/assets/images/1b56ccb7ba0c825c.jpg');
            background-size: cover;
            background-position: center;
            min-height: 620px;
            display: flex;
            align-items: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(3, 7, 18, 0.92) 0%, rgba(8, 18, 41, 0.78) 45%, rgba(3, 7, 18, 0.88) 100%);
            z-index: 0;
        }

        .hero-section .container {
            z-index: 1;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            font-size: 0.75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 20px;
            margin-bottom: 18px;
        }

        .hero-badge .pulse-dot {
            width: 7px;
            height: 7px;
            border-radius: 50%;
            background: var(--accent-cyan);
            animation: pulse-dot 1.6s ease-in-out infinite;
            flex-shrink: 0;
        }

        @keyframes pulse-dot {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.4; transform: scale(1.5); }
        }

        .hero-title {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 18px;
        }

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

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.65;
            margin-bottom: 26px;
        }

        .hero-trust-row {
            display: flex;
            flex-wrap: wrap;
            gap: 18px;
            margin-bottom: 28px;
        }

        .hero-trust-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .hero-trust-item i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-bottom: 20px;
        }

        .btn-glow-blue {
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            border: none;
        }

        .btn-glow-blue:hover {
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-outline-cyan {
            padding: 12px 28px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.5);
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .btn-outline-cyan:hover {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
            border-color: var(--accent-cyan);
        }

        /* Hero Group Buy Panel */
        .hero-group-panel {
            background: rgba(14, 22, 48, 0.78);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: var(--radius-lg);
            padding: 28px;
            box-shadow: var(--shadow-card), var(--shadow-cyan-glow);
        }

        .hero-group-panel .group-label {
            font-size: 0.72rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            margin-bottom: 8px;
        }

        .hero-group-panel .group-price {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--text-primary);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .hero-group-panel .group-price small {
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .hero-group-panel .group-original {
            font-size: 0.85rem;
            color: var(--text-secondary);
            text-decoration: line-through;
            margin-bottom: 16px;
        }

        .group-progress {
            margin-bottom: 14px;
        }

        .group-progress .progress-count {
            display: flex;
            justify-content: space-between;
            font-size: 0.82rem;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .group-progress .progress-count strong {
            color: var(--accent-cyan);
            font-weight: 600;
        }

        .progress {
            height: 8px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.1);
            overflow: hidden;
        }

        .progress-bar {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            transition: width 0.6s ease;
        }

        .group-remaining {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin-bottom: 18px;
        }

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

        .group-btn-row {
            display: flex;
            gap: 10px;
        }

        .btn-group-open {
            flex: 1;
            padding: 11px 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border: none;
            border-radius: 10px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
        }

        .btn-group-open:hover {
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-1px);
            color: #fff;
        }

        .btn-group-join {
            flex: 1;
            padding: 11px 16px;
            font-size: 0.88rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.5);
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .btn-group-join:hover {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
        }

        /* ============ SECTION COMMON ============ */
        .section-pad {
            padding: 65px 0;
        }

        .section-pad-sm {
            padding: 45px 0;
        }

        .section-head {
            margin-bottom: 36px;
        }

        .section-head .section-tag {
            display: inline-block;
            font-size: 0.7rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 20px;
            padding: 5px 13px;
            margin-bottom: 10px;
        }

        .section-head .section-title {
            font-size: 1.8rem;
            font-weight: 750;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .section-head .section-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 560px;
            line-height: 1.6;
        }

        .section-head.text-start {
            text-align: left;
        }

        /* ============ FEATURE CARDS ============ */
        .feature-card {
            background: var(--bg-card);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 24px;
            height: 100%;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .feature-card .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(56, 189, 248, 0.18));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            color: var(--accent-cyan);
            margin-bottom: 14px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }

        .feature-card .feature-title {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .feature-card .feature-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        /* ============ SCENARIO CARDS ============ */
        .scenario-card {
            background: rgba(14, 22, 48, 0.6);
            border: 1px solid rgba(37, 99, 235, 0.25);
            border-radius: var(--radius-md);
            padding: 22px;
            height: 100%;
            transition: all var(--transition-base);
            position: relative;
            overflow: hidden;
        }

        .scenario-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 3px;
            height: 100%;
            background: linear-gradient(180deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0.7;
        }

        .scenario-card:hover {
            border-color: rgba(56, 189, 248, 0.45);
            background: rgba(20, 32, 64, 0.7);
        }

        .scenario-card .scenario-title {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 8px;
        }

        .scenario-card .scenario-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ============ STATS ============ */
        .stats-row {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .stat-box {
            background: rgba(14, 22, 48, 0.6);
            border: 1px solid rgba(37, 99, 235, 0.22);
            border-radius: var(--radius-md);
            padding: 20px;
            text-align: left;
            transition: all var(--transition-base);
        }

        .stat-box:hover {
            border-color: rgba(56, 189, 248, 0.4);
            background: rgba(20, 32, 64, 0.72);
        }

        .stat-box .stat-value {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
            margin-bottom: 5px;
        }

        .stat-box .stat-label {
            font-size: 0.82rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ============ PROCESS STEPS ============ */
        .process-step {
            display: flex;
            gap: 16px;
            align-items: flex-start;
            margin-bottom: 22px;
        }

        .process-step:last-child {
            margin-bottom: 0;
        }

        .process-step .step-number {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }

        .process-step .step-content {
            flex: 1;
        }

        .process-step .step-title {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 5px;
        }

        .process-step .step-desc {
            font-size: 0.85rem;
            color: var(--text-secondary);
            margin: 0;
            line-height: 1.6;
        }

        /* ============ REVIEW CARDS ============ */
        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px;
            height: 100%;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
        }

        .review-card:hover {
            border-color: rgba(56, 189, 248, 0.4);
            background: var(--bg-card-hover);
        }

        .review-card .review-stars {
            color: #FACC15;
            font-size: 0.85rem;
            margin-bottom: 10px;
        }

        .review-card .review-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 14px;
        }

        .review-card .review-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .review-card .review-author-avatar {
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 0.85rem;
            font-weight: 700;
            color: #fff;
            flex-shrink: 0;
        }

        .review-card .review-author-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .review-card .review-author-role {
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        /* ============ PRICING ============ */
        .pricing-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            height: 100%;
            transition: all var(--transition-base);
            box-shadow: var(--shadow-card);
            position: relative;
        }

        .pricing-card.featured {
            border-color: rgba(56, 189, 248, 0.55);
            box-shadow: var(--shadow-glow), var(--shadow-cyan-glow);
            background: rgba(14, 22, 48, 0.82);
        }

        .pricing-card .pricing-badge {
            display: inline-block;
            font-size: 0.65rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 20px;
            padding: 4px 12px;
            margin-bottom: 14px;
        }

        .pricing-card .pricing-name {
            font-size: 1rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .pricing-card .pricing-price {
            font-size: 2rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.1;
            margin-bottom: 4px;
        }

        .pricing-card .pricing-price small {
            font-size: 0.8rem;
            font-weight: 500;
            color: var(--text-secondary);
        }

        .pricing-card .pricing-original {
            font-size: 0.82rem;
            color: var(--text-secondary);
            text-decoration: line-through;
            margin-bottom: 16px;
        }

        .pricing-card ul {
            list-style: none;
            padding: 0;
            margin: 0 0 20px;
        }

        .pricing-card ul li {
            font-size: 0.85rem;
            color: var(--text-secondary);
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .pricing-card ul li i {
            color: var(--accent-cyan);
            font-size: 0.8rem;
        }

        .pricing-card .btn-pricing {
            display: block;
            width: 100%;
            padding: 12px 18px;
            font-size: 0.88rem;
            font-weight: 600;
            text-align: center;
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .pricing-card .btn-pricing.btn-solid {
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: var(--shadow-glow);
        }

        .pricing-card .btn-pricing.btn-solid:hover {
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-2px);
            color: #fff;
        }

        .pricing-card .btn-pricing.btn-outline {
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.5);
        }

        .pricing-card .btn-pricing.btn-outline:hover {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
        }

        /* ============ FAQ ============ */
        .faq-item {
            background: rgba(14, 22, 48, 0.55);
            border: 1px solid rgba(37, 99, 235, 0.22);
            border-radius: var(--radius-md);
            margin-bottom: 12px;
            overflow: hidden;
            transition: all var(--transition-base);
        }

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.4);
        }

        .faq-item .faq-question {
            padding: 16px 20px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 14px;
            transition: color var(--transition-base);
        }

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

        .faq-item .faq-question .faq-toggle-icon {
            font-size: 0.8rem;
            color: var(--accent-cyan);
            flex-shrink: 0;
            transition: transform var(--transition-base);
        }

        .faq-item.open .faq-question .faq-toggle-icon {
            transform: rotate(180deg);
        }

        .faq-item .faq-answer {
            padding: 0 20px 16px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
            display: none;
        }

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

        /* ============ CTA SECTION ============ */
        .cta-section {
            background: rgba(14, 22, 48, 0.62);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: var(--radius-lg);
            padding: 40px 36px;
            box-shadow: var(--shadow-card), var(--shadow-cyan-glow);
        }

        .cta-section .cta-title {
            font-size: 1.5rem;
            font-weight: 750;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .cta-section .cta-desc {
            font-size: 0.95rem;
            color: var(--text-secondary);
            max-width: 540px;
            line-height: 1.6;
            margin-bottom: 22px;
        }

        .cta-section .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(3, 7, 18, 0.9);
            border-top: 1px solid rgba(37, 99, 235, 0.2);
            padding: 50px 0 24px;
            position: relative;
            z-index: 1;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 36px;
        }

        .footer-brand {
            display: block;
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }

        .footer-brand span {
            color: var(--accent-cyan);
        }

        .footer-col p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 0.82rem;
            font-weight: 650;
            color: var(--text-primary);
            margin-bottom: 14px;
            letter-spacing: 0.02em;
        }

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

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

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            color: var(--text-secondary);
            padding-top: 18px;
            border-top: 1px solid rgba(37, 99, 235, 0.15);
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ============ FAB ============ */
        .fab-left {
            position: fixed;
            left: 16px;
            bottom: 24px;
            z-index: 999;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7, 7, 13, 0.82);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(7, 7, 13, 0.82), rgba(7, 7, 13, 0.82)), linear-gradient(135deg, #A3E635, #06B6D4);
            background-origin: border-box;
            background-clip: padding-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.3rem;
            cursor: pointer;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            transition: all var(--transition-base);
            opacity: 0.75;
            animation: fabPulse 3s ease-in-out infinite;
        }

        .fab-left:hover {
            opacity: 1;
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.65);
            transform: scale(1.1);
        }

        .fab-left:active {
            transform: scale(0.94);
        }

        .fab-left .fab-badge {
            position: absolute;
            top: -3px;
            right: -3px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: #F43F5E;
            border: 2px solid #fff;
            animation: fab-blink 1.4s ease-in-out infinite;
        }

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

        @keyframes fab-blink {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.35; }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero-title {
                font-size: 2.2rem;
            }
            .stats-row {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --nav-height: 62px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(3, 7, 18, 0.98);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px;
                border-bottom: 1px solid rgba(37, 99, 235, 0.3);
                transform: translateY(-120%);
                transition: transform 0.38s cubic-bezier(0.22, 1, 0.36, 1);
                z-index: 999;
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links li a {
                padding: 12px 14px;
                font-size: 0.95rem;
                border-radius: 8px;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-nav-login, .btn-nav-signup {
                padding: 7px 12px;
                font-size: 0.75rem;
            }
            .hero-section {
                min-height: auto;
                padding: calc(var(--nav-height) + 40px) 0 50px;
            }
            .hero-title {
                font-size: 1.7rem;
            }
            .hero-desc {
                font-size: 0.95rem;
            }
            .hero-group-panel {
                padding: 22px;
                margin-top: 20px;
            }
            .section-pad {
                padding: 45px 0;
            }
            .section-head .section-title {
                font-size: 1.4rem;
            }
            .stats-row {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-box .stat-value {
                font-size: 1.5rem;
            }
            .cta-section {
                padding: 28px 22px;
            }
            .cta-section .cta-title {
                font-size: 1.25rem;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .fab-left {
                width: 50px;
                height: 50px;
                left: 12px;
                bottom: 16px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-title {
                font-size: 1.45rem;
            }
            .hero-actions {
                flex-direction: column;
            }
            .btn-glow-blue, .btn-outline-cyan {
                width: 100%;
                text-align: center;
            }
            .group-btn-row {
                flex-direction: column;
            }
            .stats-row {
                grid-template-columns: 1fr;
                gap: 10px;
            }
            .process-step {
                flex-direction: column;
                gap: 10px;
            }
            .cta-section {
                padding: 22px 16px;
            }
            .cta-section .cta-actions {
                flex-direction: column;
            }
            .cta-section .cta-actions a {
                width: 100%;
                text-align: center;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
            }
        }

/* roulang page: category2 */
:root {
            --bg-primary: #030712;
            --bg-secondary: #081229;
            --bg-card: rgba(14, 22, 48, 0.72);
            --bg-card-hover: rgba(20, 32, 64, 0.88);
            --accent-blue: #2563EB;
            --accent-cyan: #38BDF8;
            --accent-glow: rgba(37, 99, 235, 0.45);
            --accent-cyan-glow: rgba(56, 189, 248, 0.35);
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(56, 189, 248, 0.18);
            --border-card: rgba(37, 99, 235, 0.28);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
            --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
            --max-width: 1200px;
            --nav-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(3, 7, 18, 0.96);
            border-bottom-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }

        .nav-logo .logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .nav-logo .logo-main {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .nav-logo .logo-sub {
            font-size: 0.62rem;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 4px;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 13px;
            font-size: 0.83rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.12);
        }

        .nav-links li a.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.22);
            box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.3);
        }

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

        .btn-nav-login {
            padding: 8px 16px;
            font-size: 0.82rem;
            font-weight: 600;
            color: var(--text-primary);
            border: 1px solid rgba(56, 189, 248, 0.4);
            border-radius: 8px;
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
        }

        .btn-nav-signup {
            padding: 8px 18px;
            font-size: 0.82rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 8px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            white-space: nowrap;
        }

        .btn-nav-signup:hover {
            background: linear-gradient(135deg, #1d4ed8, #0ea5e9);
            box-shadow: 0 0 30px rgba(37, 99, 235, 0.55);
            color: #fff;
            transform: translateY(-1px);
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 6px;
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.25);
            transition: all var(--transition-base);
        }

        .nav-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle:hover {
            border-color: var(--accent-cyan);
        }

        /* ============ HERO ============ */
        .hero-category {
            padding: calc(var(--nav-height) + 60px) 0 60px;
            position: relative;
            overflow: hidden;
            background:
                linear-gradient(180deg, rgba(3, 7, 18, 0.6) 0%, rgba(3, 7, 18, 0.85) 100%),
                url('/assets/images/1b56ccb7ba0c825c.jpg') center/cover no-repeat;
            min-height: 480px;
            display: flex;
            align-items: center;
        }

        .hero-category::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(180deg, transparent, var(--bg-primary));
            pointer-events: none;
        }

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

        .hero-tag {
            display: inline-block;
            padding: 6px 14px;
            font-size: 0.72rem;
            font-weight: 700;
            letter-spacing: 0.05em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.12);
            border: 1px solid rgba(56, 189, 248, 0.3);
            border-radius: 20px;
            margin-bottom: 18px;
        }

        .hero-category h1 {
            font-size: clamp(1.8rem, 4.5vw, 2.8rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            max-width: 780px;
            margin-bottom: 18px;
        }

        .hero-category h1 span {
            color: var(--accent-cyan);
        }

        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.65;
            max-width: 680px;
            margin-bottom: 28px;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            align-items: center;
        }

        .hero-stat {
            display: flex;
            flex-direction: column;
            gap: 2px;
        }

        .hero-stat .stat-value {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: -0.01em;
        }

        .hero-stat .stat-label {
            font-size: 0.72rem;
            color: var(--text-secondary);
            font-weight: 500;
        }

        .hero-cta {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 26px;
        }

        .btn-primary-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 28px;
            font-size: 0.92rem;
            font-weight: 700;
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            border-radius: 10px;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-smooth);
            letter-spacing: 0.01em;
        }

        .btn-primary-glow:hover {
            transform: translateY(-2px);
            box-shadow: 0 0 35px rgba(37, 99, 235, 0.6), 0 0 20px rgba(56, 189, 248, 0.3);
            color: #fff;
        }

        .btn-outline-glow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 13px 24px;
            font-size: 0.92rem;
            font-weight: 600;
            color: var(--text-primary);
            background: transparent;
            border: 1px solid rgba(56, 189, 248, 0.4);
            border-radius: 10px;
            transition: all var(--transition-base);
        }

        .btn-outline-glow:hover {
            border-color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.08);
            color: var(--accent-cyan);
        }

        /* ============ SECTION COMMON ============ */
        .section {
            padding: 56px 0;
            position: relative;
        }

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

        .section-header {
            margin-bottom: 36px;
        }

        .section-header h2 {
            font-size: clamp(1.4rem, 3vw, 1.9rem);
            font-weight: 750;
            line-height: 1.25;
            letter-spacing: -0.015em;
            color: var(--text-primary);
            margin-bottom: 10px;
        }

        .section-header p {
            font-size: 0.95rem;
            color: var(--text-secondary);
            line-height: 1.6;
            max-width: 640px;
        }

        .section-tag {
            display: inline-block;
            padding: 5px 12px;
            font-size: 0.68rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: 16px;
            margin-bottom: 14px;
        }

        /* ============ FEATURE CARDS ============ */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 20px;
        }

        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 26px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-base);
        }

        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.4);
            box-shadow: var(--shadow-card), var(--shadow-cyan-glow);
            transform: translateY(-3px);
        }

        .feature-card:hover::before {
            opacity: 1;
        }

        .feature-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            margin-bottom: 16px;
            box-shadow: var(--shadow-glow);
        }

        .feature-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }

        .feature-card p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ IMAGE SHOWCASE ============ */
        .showcase-grid {
            display: grid;
            grid-template-columns: 1fr 1.1fr;
            gap: 36px;
            align-items: center;
        }

        .showcase-content h3 {
            font-size: 1.35rem;
            font-weight: 750;
            letter-spacing: -0.015em;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .showcase-content p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.65;
            margin-bottom: 16px;
        }

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

        .showcase-list li {
            display: flex;
            align-items: flex-start;
            gap: 10px;
            padding: 8px 0;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.55;
        }

        .showcase-list li::before {
            content: '◆';
            font-size: 0.6rem;
            color: var(--accent-cyan);
            margin-top: 5px;
            flex-shrink: 0;
        }

        .showcase-image {
            border-radius: var(--radius-xl);
            overflow: hidden;
            border: 1px solid var(--border-card);
            box-shadow: var(--shadow-card), var(--shadow-cyan-glow);
            position: relative;
        }

        .showcase-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

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

        /* ============ SCENARIO ============ */
        .scenario-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 28px;
        }

        .scenario-block {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            padding: 28px;
            transition: all var(--transition-base);
        }

        .scenario-block:hover {
            border-color: rgba(56, 189, 248, 0.35);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-card);
        }

        .scenario-block h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .scenario-block p {
            font-size: 0.86rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .scenario-badge {
            display: inline-block;
            padding: 3px 10px;
            font-size: 0.65rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--accent-cyan);
            background: rgba(56, 189, 248, 0.1);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: 10px;
        }

        /* ============ DATA PANEL ============ */
        .data-panel {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-xl);
            padding: 32px;
            box-shadow: var(--shadow-card);
        }

        .data-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .data-item {
            text-align: left;
            padding: 18px;
            background: rgba(3, 7, 18, 0.5);
            border-radius: var(--radius-md);
            border: 1px solid rgba(56, 189, 248, 0.1);
            transition: all var(--transition-base);
        }

        .data-item:hover {
            border-color: rgba(56, 189, 248, 0.35);
            box-shadow: var(--shadow-cyan-glow);
        }

        .data-item .data-label {
            font-size: 0.68rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.05em;
            color: var(--text-secondary);
            margin-bottom: 6px;
        }

        .data-item .data-value {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.01em;
        }

        /* ============ NEWS LIST ============ */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 18px;
        }

        .news-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: all var(--transition-smooth);
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            border-color: rgba(56, 189, 248, 0.35);
            background: var(--bg-card-hover);
            box-shadow: var(--shadow-card);
            transform: translateY(-3px);
        }

        .news-card-image {
            height: 160px;
            overflow: hidden;
            position: relative;
            background: var(--bg-secondary);
        }

        .news-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform var(--transition-smooth);
        }

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

        .news-card-body {
            padding: 18px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-meta {
            display: flex;
            gap: 10px;
            font-size: 0.68rem;
            color: var(--text-secondary);
            margin-bottom: 8px;
        }

        .news-card h4 {
            font-size: 0.92rem;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.4;
            margin-bottom: 8px;
            letter-spacing: -0.01em;
        }

        .news-card p {
            font-size: 0.78rem;
            color: var(--text-secondary);
            line-height: 1.55;
            flex: 1;
        }

        .news-empty {
            grid-column: 1 / -1;
            text-align: left;
            padding: 40px 20px;
            color: var(--text-secondary);
            font-size: 0.9rem;
            border: 1px dashed var(--border-subtle);
            border-radius: var(--radius-lg);
            background: var(--bg-card);
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 820px;
        }

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

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.3);
        }

        .faq-item summary {
            padding: 18px 22px;
            font-weight: 650;
            font-size: 0.9rem;
            color: var(--text-primary);
            cursor: pointer;
            list-style: none;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            transition: color var(--transition-base);
        }

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

        .faq-item summary::after {
            content: '+';
            font-size: 1.2rem;
            font-weight: 400;
            color: var(--accent-cyan);
            transition: transform var(--transition-base);
        }

        .faq-item[open] summary::after {
            content: '−';
            transform: rotate(0deg);
        }

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

        .faq-answer {
            padding: 0 22px 18px;
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ CTA ============ */
        .cta-band {
            padding: 60px 0;
            background:
                linear-gradient(180deg, rgba(3, 7, 18, 0.7) 0%, rgba(8, 18, 41, 0.9) 100%),
                url('/assets/images/80b2c269e1bd48be.jpg') center/cover no-repeat;
            border-radius: var(--radius-xl);
            text-align: center;
            border: 1px solid rgba(37, 99, 235, 0.25);
            position: relative;
            overflow: hidden;
            margin: 20px 0;
        }

        .cta-band h2 {
            font-size: clamp(1.3rem, 3vw, 1.8rem);
            font-weight: 750;
            color: var(--text-primary);
            letter-spacing: -0.015em;
            margin-bottom: 12px;
        }

        .cta-band p {
            font-size: 0.92rem;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 24px;
            line-height: 1.6;
        }

        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(3, 7, 18, 0.9);
            border-top: 1px solid rgba(37, 99, 235, 0.15);
            padding: 52px 0 0;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 32px;
            padding-bottom: 36px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text-primary);
            margin-bottom: 12px;
        }

        .footer-brand span {
            color: var(--accent-cyan);
            font-size: 0.72rem;
            display: block;
        }

        .footer-col p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-top: 8px;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 0.78rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 0.06em;
            color: var(--text-primary);
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .footer-col ul li a {
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            border-top: 1px solid rgba(37, 99, 235, 0.1);
            padding: 18px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        .footer-bottom a {
            color: var(--text-secondary);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ============ FAB ============ */
        .fab-support {
            position: fixed;
            left: 16px;
            bottom: 24px;
            z-index: 500;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7, 7, 13, 0.85);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            border: 2px solid transparent;
            background-clip: padding-box;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.2rem;
            cursor: pointer;
            transition: all var(--transition-smooth);
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45), 0 6px 25px rgba(0, 0, 0, 0.5);
            position: fixed;
            left: 16px;
            bottom: 90px;
            z-index: 500;
        }

        .fab-support::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 50%;
            padding: 2px;
            background: linear-gradient(135deg, #A3E635, #06B6D4, #EC4899);
            -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
            -webkit-mask-composite: xor;
            mask-composite: exclude;
            pointer-events: none;
        }

        .fab-support:hover {
            transform: scale(1.1);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.65), 0 0 18px rgba(236, 72, 153, 0.3);
            opacity: 1;
        }

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

        .fab-support .fab-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #EF4444;
            border: 2px solid #fff;
            animation: pulse-badge 2s infinite;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.7);
            }
            50% {
                box-shadow: 0 0 0 6px rgba(239, 68, 68, 0);
            }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .nav-links {
                gap: 2px;
            }
            .nav-links li a {
                padding: 8px 10px;
                font-size: 0.78rem;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(3, 7, 18, 0.97);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                gap: 4px;
                padding: 16px 20px 24px;
                border-bottom: 1px solid rgba(37, 99, 235, 0.2);
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.6);
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                max-height: calc(100vh - var(--nav-height));
                overflow-y: auto;
                z-index: 999;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links li a {
                padding: 12px 16px;
                font-size: 0.9rem;
                border-radius: 8px;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-nav-login,
            .btn-nav-signup {
                padding: 7px 12px;
                font-size: 0.75rem;
            }
            .hero-category {
                padding: calc(var(--nav-height) + 36px) 0 40px;
                min-height: 400px;
            }
            .showcase-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .scenario-row {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .news-grid {
                grid-template-columns: 1fr;
            }
            .section {
                padding: 40px 0;
            }
            .data-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .hero-category h1 {
                font-size: 1.5rem;
            }
            .hero-desc {
                font-size: 0.88rem;
            }
            .hero-stats {
                gap: 16px;
            }
            .hero-stat .stat-value {
                font-size: 1.3rem;
            }
            .data-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .nav-logo .logo-main {
                font-size: 0.8rem;
            }
            .nav-logo .logo-sub {
                font-size: 0.55rem;
            }
            .nav-actions {
                gap: 4px;
            }
            .btn-nav-login,
            .btn-nav-signup {
                padding: 6px 10px;
                font-size: 0.7rem;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .fab-support {
                width: 48px;
                height: 48px;
                bottom: 20px;
                left: 12px;
            }
        }

/* roulang page: category3 */
:root {
            --bg-primary: #030712;
            --bg-secondary: #081229;
            --bg-card: rgba(14, 22, 48, 0.72);
            --bg-card-hover: rgba(20, 32, 64, 0.88);
            --accent-blue: #2563EB;
            --accent-cyan: #38BDF8;
            --accent-glow: rgba(37, 99, 235, 0.45);
            --accent-cyan-glow: rgba(56, 189, 248, 0.35);
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(56, 189, 248, 0.18);
            --border-card: rgba(37, 99, 235, 0.28);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
            --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
            --max-width: 1200px;
            --nav-height: 72px;
        }

        * { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: inherit; text-decoration: none; transition: color var(--transition-base); }
        a:hover { color: var(--accent-cyan); }
        button, input, select, textarea { font-family: inherit; font-size: inherit; line-height: inherit; }
        button { cursor: pointer; border: none; background: none; color: inherit; }
        .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            transition: background var(--transition-base), border-color var(--transition-base);
        }
        .site-header.scrolled {
            background: rgba(3, 7, 18, 0.96);
            border-bottom-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
        }
        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }
        .nav-logo span.logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        .nav-logo .logo-main {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }
        .nav-logo .logo-sub {
            font-size: 0.65rem;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }
        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            white-space: nowrap;
        }
        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.12);
        }
        .nav-links li a.active {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.2);
            box-shadow: inset 0 0 0 1px var(--border-card);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .btn-nav-login,
        .btn-nav-signup {
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-base);
        }
        .btn-nav-login {
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.4);
            background: transparent;
        }
        .btn-nav-login:hover {
            background: rgba(56, 189, 248, 0.1);
            color: var(--accent-cyan);
        }
        .btn-nav-signup {
            color: #030712;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            box-shadow: var(--shadow-glow);
        }
        .btn-nav-signup:hover {
            box-shadow: 0 0 28px rgba(37, 99, 235, 0.6);
            color: #030712;
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            width: 42px;
            height: 42px;
            border-radius: 10px;
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid var(--border-card);
            gap: 5px;
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
        .nav-toggle.open span:nth-child(2) { opacity: 0; }
        .nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

        /* ============ HERO ============ */
        .category-hero {
            padding: calc(var(--nav-height) + 40px) 0 60px;
            background: linear-gradient(135deg, rgba(3,7,18,0.92), rgba(8,18,41,0.88)), url('/assets/images/610771253b84eb02.jpg') center/cover no-repeat;
            position: relative;
            border-bottom: 1px solid var(--border-subtle);
        }
        .category-hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
        }
        .hero-grid {
            display: flex;
            align-items: center;
            gap: 40px;
            flex-wrap: wrap;
        }
        .hero-content {
            flex: 1 1 55%;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            border-radius: 30px;
            background: rgba(37, 99, 235, 0.18);
            border: 1px solid var(--border-card);
            color: var(--accent-cyan);
            font-size: 0.8rem;
            font-weight: 600;
            letter-spacing: 0.02em;
            margin-bottom: 18px;
        }
        .hero-content h1 {
            font-size: 2.6rem;
            font-weight: 800;
            line-height: 1.25;
            margin-bottom: 18px;
            letter-spacing: -0.02em;
        }
        .hero-content .lead {
            font-size: 1.1rem;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 600px;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-wrap: wrap;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            color: #030712;
            font-weight: 700;
            font-size: 0.95rem;
            box-shadow: var(--shadow-glow);
            transition: all var(--transition-base);
            border: none;
        }
        .btn-primary:hover {
            box-shadow: 0 0 32px rgba(37, 99, 235, 0.65);
            color: #030712;
            transform: translateY(-2px);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: 10px;
            border: 1px solid var(--border-card);
            color: var(--text-primary);
            font-weight: 600;
            font-size: 0.95rem;
            background: transparent;
            transition: all var(--transition-base);
        }
        .btn-outline:hover {
            background: rgba(56, 189, 248, 0.1);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }
        .hero-stats {
            flex: 1 1 35%;
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 16px;
        }
        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 20px;
            backdrop-filter: blur(8px);
            transition: all var(--transition-base);
        }
        .stat-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
            box-shadow: var(--shadow-cyan-glow);
        }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--accent-cyan);
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        /* ============ SECTION BASE ============ */
        .section {
            padding: 60px 0;
            position: relative;
        }
        .section-alt {
            background: rgba(8, 18, 41, 0.5);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .section-header {
            margin-bottom: 36px;
        }
        .section-header h2 {
            font-size: 1.9rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            margin-bottom: 12px;
        }
        .section-header p {
            color: var(--text-secondary);
            font-size: 1rem;
            max-width: 700px;
        }

        /* ============ FEATURE CARDS ============ */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .feature-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 24px;
            transition: all var(--transition-smooth);
            position: relative;
            overflow: hidden;
        }
        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
            opacity: 0;
            transition: opacity var(--transition-base);
        }
        .feature-card:hover::before { opacity: 1; }
        .feature-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-cyan);
            transform: translateY(-6px);
            box-shadow: var(--shadow-cyan-glow);
        }
        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
        }
        .feature-card h3 {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 10px;
            letter-spacing: -0.01em;
        }
        .feature-card p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ============ SCENARIO / USE CASES ============ */
        .scenario-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }
        .scenario-item {
            display: flex;
            gap: 20px;
            align-items: flex-start;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-base);
        }
        .scenario-item:hover {
            border-color: var(--accent-cyan);
            background: var(--bg-card-hover);
            transform: translateX(6px);
        }
        .scenario-number {
            font-size: 1.3rem;
            font-weight: 800;
            color: var(--accent-cyan);
            min-width: 40px;
            text-align: center;
            background: rgba(56, 189, 248, 0.1);
            border-radius: 8px;
            padding: 4px 0;
        }
        .scenario-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 6px;
        }
        .scenario-content p {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 0;
        }

        /* ============ PROCESS / STEPS ============ */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 24px;
            counter-reset: step-counter;
        }
        .step-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 24px;
            position: relative;
            counter-increment: step-counter;
            transition: all var(--transition-base);
        }
        .step-card::before {
            content: counter(step-counter, decimal-leading-zero);
            font-size: 2.4rem;
            font-weight: 800;
            color: rgba(56, 189, 248, 0.25);
            position: absolute;
            top: 16px;
            right: 20px;
            line-height: 1;
        }
        .step-card:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-cyan);
            transform: translateY(-4px);
        }
        .step-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }
        .step-card p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            margin-bottom: 0;
            position: relative;
            z-index: 1;
        }

        /* ============ TESTIMONIALS ============ */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
            gap: 24px;
        }
        .testimonial-card {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 20px;
            transition: all var(--transition-base);
        }
        .testimonial-card:hover {
            border-color: var(--accent-cyan);
            background: var(--bg-card-hover);
        }
        .testimonial-text {
            color: var(--text-secondary);
            font-size: 0.95rem;
            margin-bottom: 16px;
            position: relative;
            padding-left: 12px;
        }
        .testimonial-text::before {
            content: '"';
            position: absolute;
            left: -4px;
            top: -6px;
            font-size: 2rem;
            color: var(--accent-cyan);
            line-height: 1;
        }
        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .testimonial-author .avatar {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #030712;
            font-weight: 700;
            flex-shrink: 0;
        }
        .author-name {
            font-size: 0.9rem;
            font-weight: 700;
        }
        .author-title {
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        /* ============ NEWS LIST ============ */
        .news-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .news-item {
            display: flex;
            gap: 16px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 14px 18px;
            transition: all var(--transition-base);
        }
        .news-item:hover {
            background: var(--bg-card-hover);
            border-color: var(--accent-cyan);
            transform: translateX(4px);
        }
        .news-thumb {
            width: 70px;
            height: 70px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            border: 1px solid var(--border-card);
        }
        .news-content {
            flex: 1;
            min-width: 0;
        }
        .news-title {
            font-size: 1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .news-meta {
            font-size: 0.8rem;
            color: var(--text-secondary);
            display: flex;
            gap: 10px;
            align-items: center;
        }
        .news-summary {
            font-size: 0.9rem;
            color: var(--text-secondary);
            margin-top: 4px;
            overflow: hidden;
            text-overflow: ellipsis;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }
        .faq-item {
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 18px 20px;
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--accent-cyan);
            background: var(--bg-card-hover);
        }
        .faq-question {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            cursor: default;
        }
        .faq-answer {
            color: var(--text-secondary);
            font-size: 0.95rem;
        }

        /* ============ FINAL CTA ============ */
        .cta-section {
            padding: 70px 0;
            background: linear-gradient(135deg, rgba(37,99,235,0.15), rgba(56,189,248,0.08)), url('/assets/images/1cdda636033a7169.jpg') center/cover no-repeat;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .cta-box {
            text-align: center;
            max-width: 750px;
            margin: 0 auto;
        }
        .cta-box h2 {
            font-size: 2rem;
            font-weight: 800;
            letter-spacing: -0.02em;
            margin-bottom: 16px;
        }
        .cta-box p {
            color: var(--text-secondary);
            font-size: 1.05rem;
            margin-bottom: 28px;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-card);
            padding: 48px 0 24px;
            position: relative;
            z-index: 1;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 32px;
            margin-bottom: 32px;
        }
        .footer-brand {
            display: inline-block;
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 12px;
        }
        .footer-brand span {
            color: var(--accent-cyan);
        }
        .footer-col p {
            color: var(--text-secondary);
            font-size: 0.9rem;
            line-height: 1.6;
        }
        .footer-col h4 {
            font-size: 0.95rem;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }
        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-col ul a {
            color: var(--text-secondary);
            font-size: 0.9rem;
            transition: color var(--transition-base);
        }
        .footer-col ul a:hover {
            color: var(--accent-cyan);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 6px 10px;
            padding-top: 24px;
            border-top: 1px solid var(--border-subtle);
            color: var(--text-secondary);
            font-size: 0.85rem;
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }
        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ============ FAB ============ */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 24px;
            z-index: 1050;
            width: 56px;
            height: 56px;
            border-radius: 50%;
            background: rgba(7,7,13,0.8);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-image: linear-gradient(rgba(7,7,13,0.8), rgba(7,7,13,0.8)), linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            background-origin: border-box;
            background-clip: content-box, border-box;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1.5rem;
            box-shadow: 0 0 20px rgba(6,182,212,0.45);
            transition: all var(--transition-smooth);
            opacity: 0.75;
            cursor: pointer;
        }
        .fab:hover {
            opacity: 1;
            transform: scale(1.1);
            box-shadow: 0 0 28px rgba(6,182,212,0.7);
            color: #fff;
        }
        .fab:active {
            transform: scale(0.95);
            border-color: #F43F5E;
        }
        .fab .notification-dot {
            position: absolute;
            top: -2px;
            right: -2px;
            width: 14px;
            height: 14px;
            background: #F43F5E;
            border-radius: 50%;
            border: 2px solid #fff;
            animation: pulse-dot 1.8s infinite;
        }
        @keyframes pulse-dot {
            0% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0.7); }
            70% { box-shadow: 0 0 0 8px rgba(244, 63, 94, 0); }
            100% { box-shadow: 0 0 0 0 rgba(244, 63, 94, 0); }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero-grid { gap: 30px; }
            .hero-content h1 { font-size: 2.2rem; }
        }
        @media (max-width: 768px) {
            :root { --nav-height: 64px; }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(3,7,18,0.98);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
                border-bottom: 1px solid var(--border-card);
                box-shadow: 0 12px 28px rgba(0,0,0,0.5);
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                z-index: 999;
            }
            .nav-links.open { transform: translateY(0); }
            .nav-links li a { padding: 12px 10px; font-size: 0.9rem; }
            .nav-toggle { display: flex; }
            .nav-actions { gap: 6px; }
            .btn-nav-login, .btn-nav-signup { padding: 7px 12px; font-size: 0.8rem; }
            .hero-grid { flex-direction: column; }
            .hero-content h1 { font-size: 1.9rem; }
            .hero-stats { grid-template-columns: 1fr 1fr; width: 100%; }
            .section { padding: 40px 0; }
            .section-header h2 { font-size: 1.6rem; }
            .news-thumb { width: 50px; height: 50px; }
            .fab { left: 12px; bottom: 16px; width: 48px; height: 48px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-content h1 { font-size: 1.6rem; }
            .btn-primary, .btn-outline { padding: 10px 18px; font-size: 0.85rem; }
            .feature-grid, .testimonial-grid, .steps-grid { grid-template-columns: 1fr; }
            .hero-stats { grid-template-columns: 1fr; }
        }

/* roulang page: category4 */
:root {
            --bg-primary: #030712;
            --bg-secondary: #081229;
            --bg-card: rgba(14, 22, 48, 0.72);
            --bg-card-hover: rgba(20, 32, 64, 0.88);
            --accent-blue: #2563EB;
            --accent-cyan: #38BDF8;
            --accent-glow: rgba(37, 99, 235, 0.45);
            --accent-cyan-glow: rgba(56, 189, 248, 0.35);
            --text-primary: #F8FAFC;
            --text-secondary: #94A3B8;
            --text-holo: #60A5FA;
            --border-subtle: rgba(56, 189, 248, 0.18);
            --border-card: rgba(37, 99, 235, 0.28);
            --radius-sm: 8px;
            --radius-md: 14px;
            --radius-lg: 22px;
            --radius-xl: 28px;
            --shadow-card: 0 8px 28px rgba(0, 0, 0, 0.45);
            --shadow-glow: 0 0 22px rgba(37, 99, 235, 0.35);
            --shadow-cyan-glow: 0 0 18px rgba(56, 189, 248, 0.3);
            --font-sans: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont, 'Roboto', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
            --transition-smooth: 0.38s cubic-bezier(0.22, 1, 0.36, 1);
            --max-width: 1200px;
            --nav-height: 64px;
        }

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

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            background-color: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.65;
            font-size: 16px;
            min-height: 100vh;
            overflow-x: hidden;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        body::before {
            content: '';
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(37, 99, 235, 0.12) 0%, transparent 55%),
                radial-gradient(ellipse at 80% 25%, rgba(56, 189, 248, 0.07) 0%, transparent 50%),
                radial-gradient(ellipse at 50% 85%, rgba(37, 99, 235, 0.06) 0%, transparent 45%);
            pointer-events: none;
            z-index: 0;
        }

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

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

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

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

        button {
            cursor: pointer;
            border: none;
            background: none;
            color: inherit;
        }

        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
            position: relative;
            z-index: 1;
        }

        /* ============ HEADER / NAV ============ */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            height: var(--nav-height);
            background: rgba(3, 7, 18, 0.88);
            backdrop-filter: blur(18px);
            -webkit-backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(37, 99, 235, 0.15);
            transition: background var(--transition-base), border-color var(--transition-base);
        }

        .site-header.scrolled {
            background: rgba(3, 7, 18, 0.96);
            border-bottom-color: rgba(56, 189, 248, 0.25);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
        }

        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            gap: 16px;
        }

        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 700;
            font-size: 1.05rem;
            color: var(--text-primary);
            white-space: nowrap;
            letter-spacing: -0.01em;
            flex-shrink: 0;
        }

        .nav-logo .logo-icon {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.15rem;
            flex-shrink: 0;
            box-shadow: var(--shadow-glow);
        }

        .nav-logo span.logo-text {
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }

        .nav-logo .logo-main {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .nav-logo .logo-sub {
            font-size: 0.65rem;
            font-weight: 500;
            color: var(--accent-cyan);
            letter-spacing: 0.03em;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: rgba(37, 99, 235, 0.1);
            border: 1px solid rgba(37, 99, 235, 0.25);
        }

        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            border-radius: 2px;
            transition: all var(--transition-base);
        }

        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }

        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }

        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 6px;
            list-style: none;
        }

        .nav-links li a {
            display: block;
            padding: 8px 14px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            border-radius: 8px;
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            white-space: nowrap;
        }

        .nav-links li a:hover {
            color: var(--text-primary);
            background: rgba(37, 99, 235, 0.12);
        }

        .nav-links li a.active {
            color: var(--accent-cyan);
            background: rgba(37, 99, 235, 0.18);
            box-shadow: inset 0 0 0 1px rgba(56, 189, 248, 0.25);
        }

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

        .btn-nav-login,
        .btn-nav-signup {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.85rem;
            font-weight: 600;
            white-space: nowrap;
            transition: all var(--transition-base);
        }

        .btn-nav-login {
            color: var(--text-primary);
            border: 1px solid rgba(56, 189, 248, 0.35);
            background: transparent;
        }

        .btn-nav-login:hover {
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            background: rgba(37, 99, 235, 0.1);
        }

        .btn-nav-signup {
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #1d4ed8);
            box-shadow: 0 0 15px rgba(37, 99, 235, 0.4);
        }

        .btn-nav-signup:hover {
            box-shadow: 0 0 22px rgba(37, 99, 235, 0.6);
            transform: translateY(-1px);
            color: #fff;
        }

        /* ============ MAIN ============ */
        main {
            padding-top: var(--nav-height);
            position: relative;
            z-index: 1;
        }

        .section {
            padding: 72px 0;
            position: relative;
        }

        .section-alt {
            background: var(--bg-secondary);
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .section-header {
            margin-bottom: 40px;
            max-width: 720px;
        }

        .section-header.left {
            margin-left: 0;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.75rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid rgba(56, 189, 248, 0.3);
            margin-bottom: 16px;
        }

        .section-title {
            font-size: clamp(1.75rem, 3vw, 2.5rem);
            font-weight: 800;
            line-height: 1.3;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 1rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 640px;
        }

        /* ============ HERO ============ */
        .hero {
            min-height: 520px;
            display: flex;
            align-items: center;
            background: linear-gradient(160deg, rgba(3, 7, 18, 0.6) 0%, rgba(8, 18, 41, 0.85) 60%, rgba(3, 7, 18, 0.95) 100%),
                        url('/assets/images/32cfe3c701df84e2.jpg') center/cover no-repeat;
            position: relative;
            padding: 80px 0 90px;
        }

        .hero::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: linear-gradient(to top, var(--bg-primary), transparent);
            pointer-events: none;
        }

        .hero-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: center;
            position: relative;
            z-index: 2;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 7px 18px;
            border-radius: 22px;
            font-size: 0.78rem;
            font-weight: 600;
            color: var(--accent-cyan);
            background: rgba(37, 99, 235, 0.15);
            border: 1px solid rgba(56, 189, 248, 0.35);
            margin-bottom: 22px;
            letter-spacing: 0.03em;
        }

        .hero-badge i {
            font-size: 0.8rem;
        }

        .hero h1 {
            font-size: clamp(2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            letter-spacing: -0.02em;
            color: var(--text-primary);
            margin-bottom: 20px;
        }

        .hero h1 .highlight {
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }

        .hero-subtitle {
            font-size: 1.05rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 520px;
            margin-bottom: 28px;
        }

        .hero-checklist {
            list-style: none;
            padding: 0;
            margin: 0 0 30px;
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }

        .hero-checklist li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.88rem;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(14, 22, 48, 0.6);
            padding: 8px 16px;
            border-radius: 8px;
            border: 1px solid rgba(56, 189, 248, 0.15);
        }

        .hero-checklist li i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
        }

        .hero-cta-group {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
            align-items: center;
        }

        .btn-primary,
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 10px;
            padding: 13px 28px;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 700;
            letter-spacing: 0.01em;
            transition: all var(--transition-base);
        }

        .btn-primary {
            color: #fff;
            background: linear-gradient(135deg, var(--accent-blue), #1d4ed8);
            box-shadow: 0 0 18px rgba(37, 99, 235, 0.4);
        }

        .btn-primary:hover {
            box-shadow: 0 0 30px rgba(37, 99, 235, 0.65);
            transform: translateY(-2px);
            color: #fff;
        }

        .btn-secondary {
            color: var(--accent-cyan);
            border: 1px solid rgba(56, 189, 248, 0.4);
            background: rgba(37, 99, 235, 0.08);
        }

        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.18);
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
        }

        .hero-visual {
            position: relative;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .hero-visual-panel {
            background: rgba(14, 22, 48, 0.8);
            backdrop-filter: blur(20px);
            border: 1px solid rgba(56, 189, 248, 0.25);
            border-radius: var(--radius-lg);
            padding: 32px;
            width: 100%;
            max-width: 440px;
            box-shadow: var(--shadow-card), var(--shadow-cyan-glow);
        }

        .hero-visual-panel .panel-title {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--accent-cyan);
            text-transform: uppercase;
            letter-spacing: 0.06em;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .data-row {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 12px 0;
            border-bottom: 1px solid rgba(56, 189, 248, 0.1);
        }

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

        .data-label {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }

        .data-value {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
        }

        .data-value.positive {
            color: #34d399;
        }

        .data-value.warning {
            color: #f59e0b;
        }

        .pulse-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #34d399;
            display: inline-block;
            animation: pulse 2s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; box-shadow: 0 0 0 0 rgba(52, 211, 153, 0.5); }
            50% { opacity: 0.7; box-shadow: 0 0 0 6px rgba(52, 211, 153, 0); }
        }

        /* ============ VALUE PROPOSITION ============ */
        .value-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
        }

        .value-card {
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-md);
            padding: 28px 24px;
            transition: all var(--transition-base);
        }

        .value-card:hover {
            background: var(--bg-card-hover);
            border-color: rgba(56, 189, 248, 0.45);
            transform: translateY(-4px);
            box-shadow: var(--shadow-glow);
        }

        .value-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(56, 189, 248, 0.15));
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            color: var(--accent-cyan);
            margin-bottom: 16px;
            border: 1px solid rgba(56, 189, 248, 0.25);
        }

        .value-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .value-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        /* ============ FEATURES ============ */
        .features-layout {
            display: grid;
            grid-template-columns: 0.9fr 1.1fr;
            gap: 48px;
            align-items: start;
        }

        .features-visual {
            position: sticky;
            top: calc(var(--nav-height) + 32px);
        }

        .features-visual img {
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border-card);
        }

        .features-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .features-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 20px;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            transition: all var(--transition-base);
        }

        .features-list li:hover {
            border-color: rgba(56, 189, 248, 0.35);
            background: var(--bg-card-hover);
        }

        .features-list li .feature-icon {
            width: 40px;
            height: 40px;
            flex-shrink: 0;
            border-radius: 10px;
            background: rgba(37, 99, 235, 0.18);
            border: 1px solid rgba(56, 189, 248, 0.25);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--accent-cyan);
            font-size: 1rem;
        }

        .features-list li h4 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 4px;
        }

        .features-list li p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        /* ============ SCENARIOS ============ */
        .scenario-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .scenario-card {
            position: relative;
            overflow: hidden;
            border-radius: var(--radius-md);
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            padding: 28px 24px;
            transition: all var(--transition-smooth);
        }

        .scenario-card:hover {
            border-color: rgba(56, 189, 248, 0.5);
            box-shadow: var(--shadow-cyan-glow);
            transform: translateY(-4px);
        }

        .scenario-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text-primary);
        }

        .scenario-card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.65;
        }

        .scenario-tag {
            display: inline-block;
            padding: 3px 10px;
            border-radius: 14px;
            font-size: 0.7rem;
            font-weight: 600;
            letter-spacing: 0.04em;
            text-transform: uppercase;
            color: var(--accent-cyan);
            background: rgba(37, 99, 235, 0.15);
            margin-bottom: 14px;
        }

        /* ============ DEMO PANEL ============ */
        .demo-panel {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
            align-items: center;
            background: var(--bg-card);
            border: 1px solid var(--border-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-card);
        }

        .demo-panel img {
            border-radius: var(--radius-md);
            border: 1px solid var(--border-subtle);
        }

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

        .stat-item {
            text-align: left;
            padding: 18px 16px;
            background: rgba(3, 7, 18, 0.5);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-subtle);
        }

        .stat-number {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--accent-cyan);
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 0.78rem;
            color: var(--text-secondary);
            margin-top: 4px;
        }

        /* ============ TESTIMONIALS ============ */
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }

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

        .testimonial-card:hover {
            border-color: rgba(56, 189, 248, 0.35);
            background: var(--bg-card-hover);
        }

        .testimonial-stars {
            display: flex;
            gap: 4px;
            color: #fbbf24;
            font-size: 0.85rem;
            margin-bottom: 14px;
        }

        .testimonial-card blockquote {
            font-size: 0.92rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 18px;
            font-style: italic;
        }

        .testimonial-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .testimonial-author .author-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-blue), var(--accent-cyan));
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.85rem;
            color: #fff;
        }

        .testimonial-author .author-name {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
        }

        .testimonial-author .author-role {
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        /* ============ INFO LIST ============ */
        .info-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .info-card {
            display: flex;
            flex-direction: column;
            background: var(--bg-card);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-md);
            padding: 22px;
            transition: all var(--transition-base);
            color: var(--text-primary);
        }

        .info-card:hover {
            border-color: rgba(56, 189, 248, 0.4);
            transform: translateY(-3px);
            box-shadow: var(--shadow-glow);
            color: var(--text-primary);
        }

        .info-card .info-meta {
            font-size: 0.75rem;
            color: var(--accent-cyan);
            margin-bottom: 10px;
            letter-spacing: 0.03em;
        }

        .info-card h3 {
            font-size: 0.95rem;
            font-weight: 700;
            line-height: 1.45;
            margin-bottom: 10px;
        }

        .info-card p {
            font-size: 0.82rem;
            color: var(--text-secondary);
            line-height: 1.6;
            flex-grow: 1;
        }

        .empty-state {
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.95rem;
            padding: 40px 0;
        }

        /* ============ FAQ ============ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
            max-width: 800px;
        }

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

        .faq-item:hover {
            border-color: rgba(56, 189, 248, 0.35);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--text-primary);
            text-align: left;
            gap: 16px;
        }

        .faq-question i {
            color: var(--accent-cyan);
            font-size: 0.9rem;
            transition: transform var(--transition-base);
        }

        .faq-item.active .faq-question i {
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height var(--transition-smooth);
        }

        .faq-item.active .faq-answer {
            max-height: 300px;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }

        /* ============ CTA SECTION ============ */
        .cta-section {
            padding: 80px 0;
            text-align: center;
            background: linear-gradient(160deg, rgba(37, 99, 235, 0.12) 0%, rgba(3, 7, 18, 0.9) 60%, rgba(3, 7, 18, 0.96) 100%),
                        url('/assets/images/1b56ccb7ba0c825c.jpg') center/cover no-repeat;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }

        .cta-section .section-title {
            margin-bottom: 16px;
        }

        .cta-section .section-desc {
            margin: 0 auto 32px;
            text-align: center;
        }

        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* ============ FOOTER ============ */
        .site-footer {
            background: rgba(3, 7, 18, 0.9);
            border-top: 1px solid var(--border-subtle);
            padding: 60px 0 30px;
            position: relative;
            z-index: 1;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand {
            display: inline-flex;
            align-items: center;
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 16px;
        }

        .footer-brand span {
            color: var(--accent-cyan);
            margin-left: 5px;
        }

        .footer-col p {
            font-size: 0.85rem;
            color: var(--text-secondary);
            line-height: 1.7;
            max-width: 340px;
        }

        .footer-col h4 {
            font-size: 0.85rem;
            font-weight: 700;
            color: var(--text-primary);
            text-transform: uppercase;
            letter-spacing: 0.05em;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a {
            font-size: 0.85rem;
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }

        .footer-col ul li a:hover {
            color: var(--accent-cyan);
        }

        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            padding-top: 24px;
            border-top: 1px solid rgba(56, 189, 248, 0.12);
            font-size: 0.75rem;
            color: var(--text-secondary);
        }

        .footer-bottom a {
            color: var(--text-secondary);
            transition: color var(--transition-base);
        }

        .footer-bottom a:hover {
            color: var(--accent-cyan);
        }

        /* ============ FAB ============ */
        .fab {
            position: fixed;
            left: 16px;
            bottom: 96px;
            z-index: 50;
            display: flex;
            align-items: center;
            justify-content: center;
            min-width: 52px;
            min-height: 52px;
            border-radius: 14px;
            background: rgba(7, 7, 13, 0.8);
            backdrop-filter: blur(12px);
            border: 2px solid transparent;
            background-clip: padding-box;
            box-shadow: 0 0 20px rgba(6, 182, 212, 0.45);
            transition: all var(--transition-base);
            color: var(--accent-cyan);
            font-size: 1.2rem;
            opacity: 0.8;
            position: fixed;
            animation: fabPulse 3s infinite;
        }

        .fab::before {
            content: '';
            position: absolute;
            inset: -2px;
            border-radius: 14px;
            background: linear-gradient(135deg, #a3e635, #06b6d4, #ec4899);
            z-index: -1;
            opacity: 0.8;
        }

        .fab:hover {
            opacity: 1;
            transform: scale(1.05);
            box-shadow: 0 0 32px rgba(6, 182, 212, 0.65);
            color: #fff;
        }

        .fab:active {
            transform: scale(0.94);
            box-shadow: 0 0 18px rgba(236, 72, 153, 0.6);
        }

        .fab .fab-notification {
            position: absolute;
            top: -4px;
            right: -4px;
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background: #ec4899;
            border: 2px solid #07070d;
            animation: fabNoti 1.8s infinite;
        }

        @keyframes fabPulse {
            0%, 100% { box-shadow: 0 0 20px rgba(6, 182, 212, 0.45); }
            50% { box-shadow: 0 0 32px rgba(6, 182, 212, 0.65); }
        }

        @keyframes fabNoti {
            0%, 100% { opacity: 1; transform: scale(1); }
            50% { opacity: 0.5; transform: scale(0.85); }
        }

        /* ============ RESPONSIVE ============ */
        @media (max-width: 1024px) {
            .hero-grid {
                grid-template-columns: 1fr;
                gap: 36px;
            }
            .hero-visual {
                order: -1;
            }
            .hero-visual-panel {
                max-width: 480px;
                margin: 0 auto;
            }
            .value-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .features-layout {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .features-visual {
                position: static;
                max-width: 420px;
            }
            .scenario-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .demo-panel {
                grid-template-columns: 1fr;
                padding: 28px;
            }
            .info-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }
            .nav-links {
                position: fixed;
                top: var(--nav-height);
                left: 0;
                right: 0;
                background: rgba(3, 7, 18, 0.97);
                backdrop-filter: blur(20px);
                flex-direction: column;
                align-items: stretch;
                padding: 16px 20px;
                gap: 4px;
                border-bottom: 1px solid var(--border-subtle);
                transform: translateY(-120%);
                transition: transform var(--transition-smooth);
                z-index: 999;
                max-height: 70vh;
                overflow-y: auto;
            }
            .nav-links.open {
                transform: translateY(0);
            }
            .nav-links li a {
                padding: 14px 16px;
                font-size: 0.9rem;
            }
            .nav-actions {
                gap: 6px;
            }
            .btn-nav-login,
            .btn-nav-signup {
                padding: 7px 13px;
                font-size: 0.78rem;
            }
            .section {
                padding: 52px 0;
            }
            .value-grid {
                grid-template-columns: 1fr;
            }
            .scenario-grid {
                grid-template-columns: 1fr;
            }
            .testimonial-grid {
                grid-template-columns: 1fr;
            }
            .info-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero {
                padding: 60px 0 70px;
                min-height: auto;
            }
            .hero-checklist {
                flex-direction: column;
                gap: 8px;
            }
            .hero-cta-group {
                flex-direction: column;
                align-items: stretch;
            }
            .btn-primary,
            .btn-secondary {
                justify-content: center;
            }
            .fab {
                left: 12px;
                bottom: 80px;
                min-width: 48px;
                min-height: 48px;
                border-radius: 12px;
                font-size: 1.1rem;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .nav-logo .logo-main {
                font-size: 0.82rem;
            }
            .nav-logo .logo-sub {
                font-size: 0.58rem;
            }
            .nav-logo .logo-icon {
                width: 30px;
                height: 30px;
                font-size: 1rem;
                border-radius: 8px;
            }
            .btn-nav-login,
            .btn-nav-signup {
                padding: 6px 10px;
                font-size: 0.72rem;
                border-radius: 6px;
            }
            .hero h1 {
                font-size: 1.7rem;
            }
            .section-title {
                font-size: 1.5rem;
            }
            .demo-panel {
                padding: 20px;
            }
            .demo-stats {
                grid-template-columns: 1fr;
            }
            .stat-number {
                font-size: 1.3rem;
            }
        }

/* roulang: framework shim */
/* 覆盖 Bootstrap 等对 a/btn 的全局默认，避免导航出现下划线/蓝链 */
.site-header a,.site-header a:hover,.navbar a,.navbar a:hover,.nav-links a,.nav-links a:hover,header nav a,header nav a:hover{text-decoration:none}
.site-header .btn,.navbar .btn,.nav-cta{text-decoration:none}