*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        :root {
            --primary: #4F46E5;
            --primary-light: #818CF8;
            --accent: #06B6D4;
            --accent2: #8B5CF6;
            --gradient-1: linear-gradient(135deg, #4F46E5, #06B6D4);
            --gradient-2: linear-gradient(135deg, #8B5CF6, #EC4899);
            --gradient-3: linear-gradient(135deg, #4F46E5, #8B5CF6, #06B6D4);
            --bg-main: #FAFBFF;
            --bg-card: #FFFFFF;
            --bg-section: #F1F5F9;
            --text-primary: #1E293B;
            --text-secondary: #475569;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
            --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
            --radius: 12px;
            --radius-lg: 20px;
            --container-max: 1200px;
            --container-pad: 24px;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            color: var(--text-primary);
            background: var(--bg-main);
            line-height: 1.7;
            overflow-x: hidden;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 var(--container-pad);
        }
        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            background: rgba(255,255,255,0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            transition: box-shadow 0.3s;
        }
        .site-header.scrolled { box-shadow: var(--shadow-md); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
        }
        .header-brand { display: flex; align-items: center; gap: 10px; }
        .header-brand img { max-height: 36px; width: auto; }
        .header-brand span { font-weight: 700; font-size: 1.1rem; color: var(--primary); }
        .header-nav { display: flex; align-items: center; gap: 28px; }
        .header-nav a {
            text-decoration: none;
            color: var(--text-secondary);
            font-size: 0.9rem;
            font-weight: 500;
            transition: color 0.2s;
            white-space: nowrap;
        }
        .header-nav a:hover { color: var(--primary); }
        .header-cta {
            background: var(--gradient-1);
            color: #fff;
            padding: 8px 20px;
            border-radius: 8px;
            text-decoration: none;
            font-size: 0.85rem;
            font-weight: 600;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .header-cta:hover { transform: translateY(-1px); box-shadow: 0 4px 12px rgba(79,70,229,0.3); }
        .mobile-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 8px;
        }
        .mobile-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text-primary);
            margin: 5px 0;
            transition: 0.3s;
            border-radius: 2px;
        }
        .mobile-menu {
            display: none;
            position: fixed;
            top: 68px;
            left: 0;
            right: 0;
            background: #fff;
            padding: 20px;
            border-bottom: 1px solid var(--border);
            box-shadow: var(--shadow-lg);
            max-height: calc(100vh - 68px);
            overflow-y: auto;
        }
        .mobile-menu.active { display: block; }
        .mobile-menu a {
            display: block;
            padding: 12px 0;
            color: var(--text-secondary);
            text-decoration: none;
            font-size: 0.95rem;
            border-bottom: 1px solid var(--border);
        }
        .mobile-menu a:last-child { border-bottom: none; }
        /* Hero */
        .hero {
            position: relative;
            padding: 140px 0 80px;
            overflow: hidden;
            background: linear-gradient(180deg, #EEF2FF 0%, #FAFBFF 100%);
        }
        .hero::before {
            content: '';
            position: absolute;
            top: -200px;
            right: -200px;
            width: 600px;
            height: 600px;
            background: radial-gradient(circle, rgba(79,70,229,0.08) 0%, transparent 70%);
            border-radius: 50%;
            animation: float 8s ease-in-out infinite;
        }
        .hero::after {
            content: '';
            position: absolute;
            bottom: -100px;
            left: -150px;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(6,182,212,0.06) 0%, transparent 70%);
            border-radius: 50%;
            animation: float 10s ease-in-out infinite reverse;
        }
        @keyframes float {
            0%, 100% { transform: translate(0, 0); }
            50% { transform: translate(20px, -20px); }
        }
        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(79,70,229,0.08);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 20px;
            font-size: 0.82rem;
            font-weight: 600;
            margin-bottom: 24px;
        }
        .hero-badge::before {
            content: '';
            width: 6px;
            height: 6px;
            background: var(--primary);
            border-radius: 50%;
            animation: pulse-dot 2s infinite;
        }
        @keyframes pulse-dot {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.4; }
        }
        .hero h1 {
            font-size: clamp(1.8rem, 4vw, 2.8rem);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 20px;
            color: var(--text-primary);
        }
        .hero h1 .highlight {
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-desc {
            font-size: 1.05rem;
            color: var(--text-secondary);
            margin-bottom: 36px;
            max-width: 600px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .btn-primary {
            background: var(--gradient-1);
            color: #fff;
            padding: 14px 32px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            transition: transform 0.2s, box-shadow 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,0.25); }
        .btn-secondary {
            background: #fff;
            color: var(--primary);
            padding: 14px 32px;
            border-radius: 10px;
            text-decoration: none;
            font-weight: 600;
            font-size: 0.95rem;
            border: 1.5px solid var(--primary);
            transition: all 0.2s;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .btn-secondary:hover { background: rgba(79,70,229,0.04); transform: translateY(-2px); }
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 60px;
            position: relative;
            z-index: 2;
        }
        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px 16px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .stat-number {
            font-size: 1.8rem;
            font-weight: 800;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .stat-label {
            font-size: 0.82rem;
            color: var(--text-muted);
            margin-top: 4px;
        }
        /* Sections */
        section { padding: 80px 0; }
        .section-alt { background: var(--bg-section); }
        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header h2 {
            font-size: clamp(1.4rem, 3vw, 2rem);
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--text-primary);
        }
        .section-header p {
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            font-size: 0.95rem;
        }
        .section-tag {
            display: inline-block;
            background: rgba(79,70,229,0.08);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: 6px;
            font-size: 0.78rem;
            font-weight: 600;
            margin-bottom: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }
        /* Cards Grid */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .card-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 16px;
            font-size: 1.4rem;
        }
        .card-icon-1 { background: rgba(79,70,229,0.1); color: var(--primary); }
        .card-icon-2 { background: rgba(6,182,212,0.1); color: var(--accent); }
        .card-icon-3 { background: rgba(139,92,246,0.1); color: var(--accent2); }
        .card-icon-4 { background: rgba(236,72,153,0.1); color: #EC4899; }
        .card-icon-5 { background: rgba(245,158,11,0.1); color: #F59E0B; }
        .card-icon-6 { background: rgba(16,185,129,0.1); color: #10B981; }
        .card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text-primary);
        }
        .card p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        /* Process */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 24px;
            position: relative;
        }
        .process-step {
            text-align: center;
            padding: 32px 20px;
            background: var(--bg-card);
            border-radius: var(--radius);
            border: 1px solid var(--border);
            position: relative;
            transition: transform 0.3s;
        }
        .process-step:hover { transform: translateY(-4px); }
        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-1);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 0.9rem;
            margin: 0 auto 16px;
        }
        .process-step h3 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--text-secondary);
        }
        /* Table */
        .table-wrapper {
            overflow-x: auto;
            border-radius: var(--radius);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
        }
        .compare-table {
            width: 100%;
            border-collapse: collapse;
            min-width: 600px;
            background: var(--bg-card);
        }
        .compare-table th, .compare-table td {
            padding: 14px 18px;
            text-align: left;
            font-size: 0.88rem;
            border-bottom: 1px solid var(--border);
        }
        .compare-table th {
            background: linear-gradient(135deg, #4F46E5, #6366F1);
            color: #fff;
            font-weight: 600;
            white-space: nowrap;
        }
        .compare-table tr:last-child td { border-bottom: none; }
        .compare-table tr:hover td { background: rgba(79,70,229,0.02); }
        .compare-table .highlight-col { background: rgba(79,70,229,0.04); font-weight: 600; }
        .star { color: #F59E0B; }
        .score-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            background: rgba(16,185,129,0.1);
            color: #059669;
            padding: 3px 10px;
            border-radius: 12px;
            font-size: 0.82rem;
            font-weight: 600;
        }
        /* FAQ */
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            margin-bottom: 12px;
            border: 1px solid var(--border);
            overflow: hidden;
            transition: box-shadow 0.3s;
        }
        .faq-item:hover { box-shadow: var(--shadow-sm); }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 24px;
            cursor: pointer;
            font-weight: 600;
            font-size: 0.92rem;
            color: var(--text-primary);
            user-select: none;
        }
        .faq-question::after {
            content: '+';
            font-size: 1.3rem;
            color: var(--primary);
            transition: transform 0.3s;
            flex-shrink: 0;
            margin-left: 12px;
        }
        .faq-item.active .faq-question::after { content: '−'; }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease, padding 0.3s;
        }
        .faq-item.active .faq-answer {
            max-height: 300px;
            padding: 0 24px 18px;
        }
        .faq-answer p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        /* Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 24px;
        }
        .review-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 28px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s;
        }
        .review-card:hover { transform: translateY(-3px); }
        .review-stars { color: #F59E0B; font-size: 0.9rem; margin-bottom: 12px; }
        .review-text {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 16px;
            font-style: italic;
        }
        .review-author {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .review-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: var(--gradient-1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 700;
            font-size: 0.85rem;
        }
        .review-name { font-weight: 600; font-size: 0.88rem; }
        .review-role { font-size: 0.78rem; color: var(--text-muted); }
        /* Cases */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .case-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            overflow: hidden;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .case-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .case-img {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
        }
        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s;
        }
        .case-card:hover .case-img img { transform: scale(1.03); }
        .case-body { padding: 20px; }
        .case-body h3 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
        .case-body p { font-size: 0.85rem; color: var(--text-secondary); }
        .case-tag {
            display: inline-block;
            background: rgba(79,70,229,0.08);
            color: var(--primary);
            padding: 3px 10px;
            border-radius: 6px;
            font-size: 0.75rem;
            font-weight: 600;
            margin-top: 10px;
        }
        /* Token Table */
        .token-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 16px;
        }
        .token-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
            text-align: center;
            transition: transform 0.3s;
        }
        .token-card:hover { transform: translateY(-3px); }
        .token-card h4 { font-size: 0.92rem; font-weight: 700; margin-bottom: 8px; }
        .token-price {
            font-size: 1.4rem;
            font-weight: 800;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .token-unit { font-size: 0.78rem; color: var(--text-muted); }
        /* Training */
        .training-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
            gap: 20px;
        }
        .training-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--border);
            display: flex;
            align-items: flex-start;
            gap: 14px;
            transition: transform 0.3s, box-shadow 0.3s;
        }
        .training-item:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
        .training-icon {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            background: var(--gradient-1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.1rem;
            flex-shrink: 0;
        }
        .training-item h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 4px; }
        .training-item p { font-size: 0.82rem; color: var(--text-secondary); }
        /* Form */
        .form-section {
            background: linear-gradient(135deg, #EEF2FF 0%, #F0FDFA 100%);
        }
        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            max-width: 700px;
            margin: 0 auto;
        }
        .form-group { display: flex; flex-direction: column; }
        .form-group.full { grid-column: 1 / -1; }
        .form-group label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--text-primary);
            margin-bottom: 6px;
        }
        .form-group input,
        .form-group select,
        .form-group textarea {
            padding: 12px 16px;
            border: 1.5px solid var(--border);
            border-radius: 8px;
            font-size: 0.9rem;
            background: #fff;
            transition: border-color 0.2s;
            font-family: inherit;
        }
        .form-group input:focus,
        .form-group select:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: var(--primary);
        }
        .form-group textarea { resize: vertical; min-height: 100px; }
        .form-submit {
            grid-column: 1 / -1;
            text-align: center;
            margin-top: 10px;
        }
        .form-submit button {
            background: var(--gradient-1);
            color: #fff;
            padding: 14px 48px;
            border: none;
            border-radius: 10px;
            font-size: 1rem;
            font-weight: 600;
            cursor: pointer;
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .form-submit button:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(79,70,229,0.25); }
        /* Service Network */
        .network-cities {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            justify-content: center;
        }
        .city-tag {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 8px 18px;
            border-radius: 8px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-secondary);
            transition: all 0.2s;
        }
        .city-tag:hover { border-color: var(--primary); color: var(--primary); background: rgba(79,70,229,0.04); }
        /* Glossary */
        .glossary-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }
        .glossary-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
        }
        .glossary-item dt { font-weight: 700; font-size: 0.92rem; margin-bottom: 6px; color: var(--primary); }
        .glossary-item dd { font-size: 0.85rem; color: var(--text-secondary); }
        /* Articles */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }
        .article-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 24px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-sm);
            transition: transform 0.3s;
        }
        .article-card:hover { transform: translateY(-3px); }
        .article-card h3 { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; }
        .article-card h3 a { color: var(--text-primary); text-decoration: none; }
        .article-card h3 a:hover { color: var(--primary); }
        .article-card p { font-size: 0.82rem; color: var(--text-secondary); }
        .article-meta { font-size: 0.75rem; color: var(--text-muted); margin-top: 10px; }
        /* Troubleshooting */
        .trouble-list {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 20px;
        }
        .trouble-item {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 20px;
            border: 1px solid var(--border);
            border-left: 4px solid var(--primary);
        }
        .trouble-item h4 { font-size: 0.9rem; font-weight: 700; margin-bottom: 6px; }
        .trouble-item p { font-size: 0.82rem; color: var(--text-secondary); }
        /* Footer */
        .site-footer {
            background: #1E293B;
            color: #CBD5E1;
            padding: 60px 0 30px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand p { font-size: 0.85rem; line-height: 1.7; margin-top: 12px; }
        .footer-col h4 {
            color: #F8FAFC;
            font-size: 0.92rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .footer-col a {
            display: block;
            color: #94A3B8;
            text-decoration: none;
            font-size: 0.85rem;
            padding: 4px 0;
            transition: color 0.2s;
        }
        .footer-col a:hover { color: #E2E8F0; }
        .footer-qr {
            margin-top: 16px;
        }
        .footer-qr img {
            width: 120px;
            height: auto;
            border-radius: 8px;
            border: 2px solid rgba(255,255,255,0.1);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 16px;
        }
        .footer-bottom p { font-size: 0.8rem; color: #64748B; }
        .footer-links { display: flex; flex-wrap: wrap; gap: 16px; }
        .footer-links a {
            color: #94A3B8;
            text-decoration: none;
            font-size: 0.8rem;
            transition: color 0.2s;
        }
        .footer-links a:hover { color: #E2E8F0; }
        /* Floating CS */
        .float-cs {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 12px;
        }
        .float-cs-btn {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--gradient-1);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.3rem;
            box-shadow: 0 4px 16px rgba(79,70,229,0.3);
            cursor: pointer;
            transition: transform 0.2s;
            border: none;
        }
        .float-cs-btn:hover { transform: scale(1.1); }
        .float-top {
            width: 42px;
            height: 42px;
            border-radius: 50%;
            background: #fff;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            border: 1px solid var(--border);
            transition: transform 0.2s;
            opacity: 0;
            pointer-events: none;
        }
        .float-top.visible { opacity: 1; pointer-events: auto; }
        .float-top:hover { transform: scale(1.1); }
        /* Animations */
        .reveal {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        /* Responsive */
        @media (max-width: 1024px) {
            .header-nav { display: none; }
            .mobile-toggle { display: block; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root { --container-pad: 16px; }
            section { padding: 50px 0; }
            .hero { padding: 110px 0 60px; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .form-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .float-cs { bottom: 20px; right: 20px; }
        }
        @media (max-width: 480px) {
            .hero-stats { grid-template-columns: repeat(2, 1fr); gap: 10px; }
            .stat-card { padding: 16px 12px; }
            .stat-number { font-size: 1.4rem; }
            .cards-grid { grid-template-columns: 1fr; }
        }
        /* Platform intro */
        .intro-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        .intro-text h2 { font-size: 1.6rem; font-weight: 700; margin-bottom: 16px; }
        .intro-text p { font-size: 0.92rem; color: var(--text-secondary); margin-bottom: 12px; line-height: 1.8; }
        .intro-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
            margin-top: 20px;
        }
        .intro-feat {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            font-weight: 500;
        }
        .intro-feat::before {
            content: '✓';
            color: var(--accent);
            font-weight: 700;
        }
        .intro-visual {
            background: linear-gradient(135deg, #EEF2FF, #F0FDFA);
            border-radius: var(--radius-lg);
            padding: 40px;
            text-align: center;
        }
        .intro-visual-inner {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 12px;
        }
        .model-chip {
            background: #fff;
            border-radius: 8px;
            padding: 10px 8px;
            font-size: 0.75rem;
            font-weight: 600;
            text-align: center;
            color: var(--text-secondary);
            border: 1px solid var(--border);
            transition: all 0.2s;
        }
        .model-chip:hover { border-color: var(--primary); color: var(--primary); }
        @media (max-width: 768px) {
            .intro-grid { grid-template-columns: 1fr; }
            .intro-features { grid-template-columns: 1fr; }
        }
        /* Tag cloud */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            justify-content: center;
        }
        .tag-cloud-item {
            background: var(--bg-card);
            border: 1px solid var(--border);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.82rem;
            color: var(--text-secondary);
            transition: all 0.2s;
        }
        .tag-cloud-item:hover { border-color: var(--primary); color: var(--primary); }
        /* Evaluation */
        .eval-card {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-md);
            text-align: center;
            max-width: 500px;
            margin: 0 auto 40px;
        }
        .eval-score {
            font-size: 3.5rem;
            font-weight: 800;
            background: var(--gradient-1);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .eval-max { font-size: 1rem; color: var(--text-muted); }
        .eval-stars { font-size: 1.4rem; color: #F59E0B; margin: 12px 0; }
        .eval-label { font-size: 0.9rem; font-weight: 600; color: var(--text-primary); }