/* CSS Reset & Variable Design - 斑斓彩调风 (Vibrant Corporate) */
        :root {
            --primary: #6366f1; /* 靛蓝 */
            --primary-light: #818cf8;
            --secondary: #a855f7; /* 紫罗兰 */
            --accent-cyan: #06b6d4; /* 青色 */
            --accent-pink: #ec4899; /* 玫瑰粉 */
            --bg-base: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --radius-lg: 16px;
            --radius-md: 8px;
            --shadow-sm: 0 4px 6px -1px rgb(0 0 0 / 0.05);
            --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.08);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background-color: var(--bg-base);
            color: var(--text-main);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Container Limit & Center alignment */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* Typo */
        h1, h2, h3, h4 {
            font-weight: 700;
            color: var(--text-main);
        }

        section {
            padding: 80px 0;
            position: relative;
        }

        /* 装饰背景 */
        .glow-bg {
            position: absolute;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            filter: blur(120px);
            opacity: 0.15;
            pointer-events: none;
            z-index: 1;
        }
        .glow-1 { top: 10%; left: 5%; background: var(--primary); }
        .glow-2 { top: 40%; right: 5%; background: var(--secondary); }
        .glow-3 { bottom: 10%; left: 10%; background: var(--accent-cyan); }

        /* Header */
        header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-color);
            transition: var(--transition);
        }
        
        .nav-wrapper {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-box {
            display: flex;
            align-items: center;
        }

        .logo-box img {
            height: 40px;
            display: block;
        }

        .nav-menu {
            display: flex;
            gap: 24px;
            list-style: none;
        }

        .nav-menu a {
            color: var(--text-main);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .nav-menu a:hover {
            color: var(--primary);
        }

        .nav-btn {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff !important;
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 13px;
        }

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-main);
        }

        /* Hero Section (No Image, CSS Gradients & Float Elements) */
        .hero {
            padding: 100px 0 120px;
            background: linear-gradient(180deg, rgba(99, 102, 241, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            padding: 6px 16px;
            border-radius: 30px;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 24px;
            border: 1px solid rgba(99, 102, 241, 0.2);
        }

        .hero-title {
            font-size: 44px;
            line-height: 1.25;
            margin-bottom: 20px;
            background: linear-gradient(135deg, var(--primary), var(--secondary), var(--accent-pink));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            max-width: 760px;
            margin: 0 auto 36px;
            font-size: 18px;
            color: var(--text-muted);
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 16px;
            margin-bottom: 48px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: var(--radius-md);
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: #fff;
            box-shadow: 0 4px 14px rgba(99, 102, 241, 0.4);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
        }

        .btn-secondary {
            background: #fff;
            border: 1px solid var(--border-color);
            color: var(--text-main);
        }

        .btn-secondary:hover {
            background: var(--bg-base);
            transform: translateY(-2px);
        }

        /* Data Badges */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }

        .stat-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-4px);
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }

        .stat-val {
            font-size: 28px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--secondary), var(--accent-cyan));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            margin-bottom: 4px;
        }

        .stat-lbl {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Section Global Typography */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        .section-header .section-tag {
            color: var(--primary);
            text-transform: uppercase;
            font-size: 13px;
            letter-spacing: 2px;
            font-weight: 700;
            margin-bottom: 10px;
            display: block;
        }
        .section-header h2 {
            font-size: 32px;
            margin-bottom: 16px;
        }
        .section-header p {
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* About Us & Platform Capability */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
        }
        
        .about-text h3 {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .model-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .model-tag {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 6px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            transition: var(--transition);
        }

        .model-tag:hover {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(6, 182, 212, 0.05));
            border-color: var(--accent-cyan);
            color: var(--accent-cyan);
            transform: translateY(-2px);
        }

        /* AIGC Service Grid */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0; left: 0; right: 0; height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent-cyan));
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
            border-color: transparent;
        }

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

        .service-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            color: #fff;
            margin-bottom: 20px;
        }

        /* Process Steps */
        .process-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .process-step {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            padding: 24px;
            border-radius: var(--radius-lg);
            text-align: center;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent-pink));
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 16px;
        }

        .process-step h3 {
            font-size: 18px;
            margin-bottom: 8px;
        }

        .process-step p {
            font-size: 13px;
            color: var(--text-muted);
        }

        /* Solutions */
        .solutions-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

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

        .solution-card:hover {
            transform: scale(1.01);
            box-shadow: var(--shadow-md);
        }

        .solution-body {
            padding: 30px;
        }

        .solution-tag {
            display: inline-block;
            padding: 4px 10px;
            background: rgba(6, 182, 212, 0.1);
            color: var(--accent-cyan);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 12px;
        }

        .solution-body h3 {
            font-size: 22px;
            margin-bottom: 12px;
        }

        .solution-body p {
            color: var(--text-muted);
            font-size: 14px;
            margin-bottom: 20px;
        }

        .solution-features {
            list-style: none;
        }

        .solution-features li {
            font-size: 13px;
            color: var(--text-main);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .solution-features li::before {
            content: '✓';
            color: var(--primary);
            font-weight: bold;
        }

        /* Network & Flow & Technical standard & Training */
        .three-col-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .info-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: var(--transition);
        }

        .info-card:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-sm);
        }

        .info-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        /* Review / Comparison section */
        .comparison-table-wrapper {
            overflow-x: auto;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            margin-bottom: 40px;
        }

        table.comparison-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .comparison-table th, .comparison-table td {
            padding: 16px 20px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .comparison-table th {
            background: rgba(99, 102, 241, 0.05);
            font-weight: 700;
        }

        .comparison-table tr:last-child td {
            border-bottom: none;
        }

        .highlight-cell {
            background: rgba(99, 102, 241, 0.02);
            font-weight: 600;
            color: var(--primary);
        }

        .rating-box {
            display: flex;
            align-items: center;
            justify-content: space-around;
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.1), rgba(168, 85, 247, 0.1));
            border-radius: var(--radius-lg);
            padding: 30px;
            border: 1px solid rgba(99, 102, 241, 0.2);
        }

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

        .rating-num {
            font-size: 40px;
            font-weight: 900;
            color: var(--primary);
        }

        .rating-stars {
            color: #fbbf24;
            font-size: 20px;
            margin-top: 5px;
        }

        /* Token Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .price-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 30px;
            text-align: center;
            position: relative;
            transition: var(--transition);
        }

        .price-card.popular {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
        }

        .price-card.popular::after {
            content: '最佳性价比';
            position: absolute;
            top: 15px; right: 15px;
            background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
            color: #fff;
            font-size: 11px;
            padding: 4px 8px;
            border-radius: 20px;
            font-weight: 600;
        }

        .price-header h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .price-val {
            font-size: 36px;
            font-weight: 800;
            margin: 20px 0;
            color: var(--primary);
        }

        .price-features {
            list-style: none;
            margin: 24px 0;
            text-align: left;
        }

        .price-features li {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 8px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .price-features li::before {
            content: '●';
            color: var(--primary);
            font-size: 8px;
        }

        /* Case Studies (with Specified Images) */
        .case-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .case-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .case-img-box {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #eee;
        }

        .case-img-box img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-content {
            padding: 24px;
        }

        /* Form (Match/Contact) */
        .form-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.02), rgba(168, 85, 247, 0.02));
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            padding: 40px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .form-info h3 {
            font-size: 24px;
            margin-bottom: 16px;
        }

        .form-info p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }

        .contact-list-info {
            list-style: none;
        }

        .contact-list-info li {
            margin-bottom: 12px;
            font-size: 14px;
        }

        .contact-list-info strong {
            color: var(--primary);
        }

        .contact-form {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }

        .contact-form .full-width {
            grid-column: span 2;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-md);
            outline: none;
            transition: var(--transition);
            background: var(--bg-card);
            font-size: 14px;
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
        }

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

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

        .faq-header {
            padding: 18px 24px;
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
            transition: var(--transition);
        }

        .faq-header::after {
            content: '+';
            font-size: 20px;
            color: var(--primary);
            transition: var(--transition);
        }

        .faq-item.active .faq-header::after {
            content: '−';
            transform: rotate(180deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            padding: 0 24px;
            color: var(--text-muted);
            font-size: 14px;
        }

        .faq-item.active .faq-body {
            max-height: 200px;
            padding-bottom: 18px;
        }

        /* Help & Terms & Self-check */
        .split-card-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 20px;
        }

        .split-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
        }

        .split-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--primary);
        }

        .split-card ul {
            list-style: none;
        }

        .split-card ul li {
            font-size: 13px;
            margin-bottom: 8px;
            color: var(--text-muted);
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 6px;
        }

        .split-card ul li:last-child {
            border-bottom: none;
        }

        /* Articles & Feed */
        .article-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 20px;
        }

        .article-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 20px;
            transition: var(--transition);
        }

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-sm);
        }

        .article-tag {
            display: inline-block;
            font-size: 11px;
            background: rgba(168, 85, 247, 0.1);
            color: var(--secondary);
            padding: 2px 8px;
            border-radius: 12px;
            margin-bottom: 10px;
        }

        .article-card h3 {
            font-size: 16px;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .article-link {
            font-size: 13px;
            color: var(--primary);
            text-decoration: none;
            font-weight: 500;
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        /* Review / Testimonials */
        .review-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .review-card {
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 24px;
            transition: var(--transition);
        }

        .review-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-md);
        }

        .review-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 16px;
        }

        .user-avatar {
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--accent-cyan), var(--primary));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
            font-size: 16px;
        }

        .user-info h4 {
            font-size: 14px;
            margin-bottom: 2px;
        }

        .user-info span {
            font-size: 11px;
            color: var(--text-muted);
        }

        .review-content {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.5;
        }

        /* Float QR Code & Back to top */
        .float-widget {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 99;
        }

        .widget-item {
            width: 50px;
            height: 50px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .widget-item:hover {
            background: var(--primary);
            color: #fff;
        }

        .widget-item svg {
            width: 20px;
            height: 20px;
            fill: currentColor;
        }

        .qr-popover {
            position: absolute;
            bottom: 0;
            right: 60px;
            background: var(--bg-card);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-lg);
            padding: 16px;
            box-shadow: var(--shadow-md);
            opacity: 0;
            pointer-events: none;
            transform: scale(0.9);
            transform-origin: bottom right;
            transition: var(--transition);
            width: 180px;
            text-align: center;
        }

        .qr-popover img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        .qr-popover span {
            font-size: 12px;
            color: var(--text-main);
            display: block;
        }

        .widget-item:hover .qr-popover {
            opacity: 1;
            pointer-events: auto;
            transform: scale(1);
        }

        /* Footer */
        footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px;
            border-top: 1px solid #1e293b;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-brand img {
            height: 40px;
            margin-bottom: 20px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.6;
        }

        .footer-col h4 {
            color: #f1f5f9;
            font-size: 15px;
            margin-bottom: 16px;
        }

        .footer-links {
            list-style: none;
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: #fff;
        }

        .footer-qrcode {
            display: flex;
            gap: 16px;
        }

        .footer-qrcode-item {
            text-align: center;
            font-size: 11px;
        }

        .footer-qrcode-item img {
            width: 80px;
            height: 80px;
            border-radius: 4px;
            margin-bottom: 6px;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
            font-size: 12px;
        }

        .footer-bottom-links a {
            color: #64748b;
            text-decoration: none;
            margin-left: 16px;
            transition: var(--transition);
        }

        .footer-bottom-links a:hover {
            color: #f1f5f9;
        }

        /* Responsive Design */
        @media (max-width: 1024px) {
            .hero-title { font-size: 36px; }
            .hero-stats { grid-template-columns: repeat(2, 1fr); }
            .solutions-grid { grid-template-columns: 1fr; }
            .pricing-grid { grid-template-columns: 1fr; }
            .review-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr 1fr; }
            .three-col-grid { grid-template-columns: 1fr; }
            .split-card-grid { grid-template-columns: 1fr; }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px; left: 0; right: 0;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                box-shadow: var(--shadow-md);
                border-bottom: 1px solid var(--border-color);
                gap: 16px;
            }

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

            .nav-toggle {
                display: block;
            }

            .about-grid { grid-template-columns: 1fr; }
            .process-flow { grid-template-columns: 1fr; }
            .case-grid { grid-template-columns: 1fr; }
            .form-grid { grid-template-columns: 1fr; }
            .contact-form { grid-template-columns: 1fr; }
            .contact-form .full-width { grid-column: span 1; }
            .footer-grid { grid-template-columns: 1fr; }
        }