:root {
            --primary: #ff0055;
            --primary-glow: rgba(255, 0, 85, 0.15);
            --secondary: #00f0ff;
            --accent: #7928ca;
            --dark: #0f172a;
            --light: #f8fafc;
            --border-color: #e2e8f0;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --container-w: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

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

        img {
            max-width: 100%;
            height: auto;
            vertical-align: middle;
        }

        .container {
            width: 100%;
            max-width: var(--container-w);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 艳色潮流风 - 潮流渐变文字 */
        .gradient-text {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 50%, var(--secondary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            font-weight: 800;
        }

        .section-title {
            text-align: center;
            font-size: 2.2rem;
            margin-bottom: 50px;
            position: relative;
            color: var(--dark);
        }

        .section-title::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            margin: 15px auto 0;
            border-radius: 2px;
        }

        /* Header & Navigation */
        header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            z-index: 1000;
            border-bottom: 1px solid var(--border-color);
            box-shadow: 0 2px 10px rgba(0,0,0,0.02);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
        }

        .logo-box {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-box img {
            height: 40px;
            width: auto;
        }

        .logo-text {
            font-size: 1.25rem;
            font-weight: 800;
            letter-spacing: 1px;
        }

        .nav-menu {
            display: flex;
            gap: 20px;
            list-style: none;
        }

        .nav-link {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-main);
            padding: 5px 10px;
        }

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

        .nav-btn {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff !important;
            padding: 8px 20px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            box-shadow: 0 4px 15px var(--primary-glow);
        }

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

        .nav-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: var(--transition);
        }

        /* Hero Section (首屏无图设计，采用炫丽CSS网格与流光) */
        .hero-section {
            background: radial-gradient(circle at 80% 20%, rgba(0, 240, 255, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(255, 0, 85, 0.08) 0%, transparent 50%),
                        #fff;
            padding: 100px 0 80px;
            text-align: center;
            border-bottom: 1px solid var(--border-color);
        }

        .hero-container {
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background: rgba(255, 0, 85, 0.06);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(255, 0, 85, 0.15);
        }

        .hero-title {
            font-size: 3rem;
            line-height: 1.25;
            margin-bottom: 25px;
            font-weight: 900;
            color: var(--dark);
        }

        .hero-desc {
            font-size: 1.2rem;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            justify-content: center;
            gap: 15px;
            margin-bottom: 50px;
        }

        .btn {
            padding: 14px 32px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            cursor: pointer;
            border: none;
            transition: var(--transition);
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            box-shadow: 0 8px 25px rgba(255, 0, 85, 0.25);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(255, 0, 85, 0.35);
        }

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

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

        /* 首页数据指标卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
            background: #fff;
            padding: 25px;
            border-radius: 16px;
            box-shadow: 0 10px 40px rgba(0,0,0,0.04);
            border: 1px solid var(--border-color);
        }

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

        .stat-val {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* Section Layout */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        /* About Us */
        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-text h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .about-p {
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 1rem;
        }

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

        .about-features li {
            margin-bottom: 12px;
            font-weight: 500;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .about-features li::before {
            content: '✓';
            color: var(--secondary);
            font-weight: bold;
            background: rgba(0, 240, 255, 0.1);
            width: 20px;
            height: 20px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            font-size: 0.8rem;
        }

        /* Services & Models Platform */
        .platform-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--accent));
            opacity: 0;
            transition: var(--transition);
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0,0,0,0.06);
        }

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

        .service-icon {
            font-size: 2rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .service-card p {
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        /* Tag Cloud - Supported Models */
        .tags-wrapper {
            margin-top: 50px;
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .tags-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .tag-item {
            background: var(--light);
            color: var(--text-main);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 0.85rem;
            font-weight: 500;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .tag-item:hover {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            border-color: transparent;
        }

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

        .solution-card {
            background: #fff;
            border-radius: 12px;
            padding: 24px;
            border: 1px solid var(--border-color);
            text-align: center;
        }

        .solution-card h4 {
            margin: 15px 0 10px;
            color: var(--dark);
        }

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

        .timeline-step {
            background: #fff;
            padding: 25px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .step-num {
            position: absolute;
            top: -15px;
            left: 20px;
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: #fff;
            width: 35px;
            height: 35px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 0.9rem;
            box-shadow: 0 4px 10px var(--primary-glow);
        }

        .timeline-step h4 {
            margin-top: 15px;
            margin-bottom: 10px;
            font-size: 1.1rem;
        }

        /* Cases Center with images */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background: #fff;
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.08);
        }

        .case-img {
            height: 200px;
            overflow: hidden;
            background: #f1f5f9;
            position: relative;
        }

        .case-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .case-info {
            padding: 20px;
        }

        .case-tag {
            color: var(--primary);
            font-size: 0.75rem;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 8px;
            display: block;
        }

        .case-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .case-desc {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* Evaluation Table */
        .eval-wrapper {
            background: #fff;
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 40px rgba(0,0,0,0.02);
        }

        .eval-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
            margin-bottom: 30px;
            border-bottom: 1px solid var(--border-color);
            padding-bottom: 20px;
        }

        .eval-score-box {
            display: flex;
            align-items: center;
            gap: 15px;
        }

        .eval-stars {
            color: #fbbf24;
            font-size: 1.4rem;
        }

        .eval-score {
            font-size: 2.2rem;
            font-weight: 900;
            color: var(--primary);
        }

        .eval-table-container {
            width: 100%;
            overflow-x: auto;
        }

        .eval-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 600px;
        }

        .eval-table th, .eval-table td {
            padding: 16px;
            border-bottom: 1px solid var(--border-color);
        }

        .eval-table th {
            font-weight: 700;
            color: var(--dark);
            background: var(--light);
        }

        .eval-table tr:hover td {
            background: rgba(0, 240, 255, 0.02);
        }

        .badge-positive {
            background: rgba(16, 185, 129, 0.1);
            color: #10b981;
            padding: 4px 10px;
            border-radius: 4px;
            font-size: 0.8rem;
            font-weight: 600;
        }

        /* Token Pricing */
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 25px;
        }

        .pricing-card {
            background: #fff;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            padding: 30px;
            position: relative;
            transition: var(--transition);
        }

        .pricing-card.featured {
            border: 2px solid var(--primary);
            box-shadow: 0 10px 30px var(--primary-glow);
        }

        .pricing-card.featured::after {
            content: 'HOT';
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--primary);
            color: #fff;
            padding: 2px 8px;
            font-size: 0.7rem;
            font-weight: bold;
            border-radius: 4px;
        }

        .pricing-name {
            font-size: 1.1rem;
            font-weight: bold;
            margin-bottom: 10px;
        }

        .pricing-cost {
            font-size: 2rem;
            font-weight: 900;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .pricing-cost span {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: normal;
        }

        .pricing-features {
            list-style: none;
            margin-bottom: 30px;
        }

        .pricing-features li {
            font-size: 0.9rem;
            margin-bottom: 10px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

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

        .faq-item {
            background: #fff;
            border-radius: 8px;
            border: 1px solid var(--border-color);
            margin-bottom: 15px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-btn {
            width: 100%;
            background: none;
            border: none;
            padding: 20px;
            text-align: left;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .faq-btn::after {
            content: '+';
            font-size: 1.5rem;
            color: var(--primary);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-btn::after {
            transform: rotate(45deg);
        }

        .faq-panel {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: var(--light);
        }

        .faq-content {
            padding: 20px;
            color: var(--text-muted);
            font-size: 0.95rem;
            border-top: 1px solid var(--border-color);
        }

        /* Customer Reviews */
        .reviews-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .review-card {
            background: #fff;
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 20px rgba(0,0,0,0.01);
        }

        .review-text {
            font-style: italic;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .user-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--secondary), var(--accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: bold;
            font-size: 1.1rem;
        }

        .user-info h5 {
            font-size: 0.95rem;
            font-weight: 700;
            color: var(--dark);
        }

        .user-info p {
            font-size: 0.75rem;
            color: var(--text-muted);
        }

        /* News & Knowledge base */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .news-card {
            background: #fff;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            overflow: hidden;
            transition: var(--transition);
        }

        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .news-body {
            padding: 24px;
        }

        .news-meta {
            font-size: 0.8rem;
            color: var(--text-muted);
            margin-bottom: 10px;
        }

        .news-title {
            font-size: 1.05rem;
            font-weight: bold;
            margin-bottom: 15px;
            line-height: 1.4;
        }

        .news-link {
            color: var(--primary);
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

        /* Contact & Form */
        .contact-section {
            background: linear-gradient(to bottom, #fff, var(--light));
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
        }

        .contact-info h3 {
            font-size: 1.8rem;
            margin-bottom: 20px;
            color: var(--dark);
        }

        .contact-details {
            margin-bottom: 30px;
        }

        .contact-item {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 15px;
            font-size: 1rem;
        }

        .qr-wrapper {
            background: #fff;
            padding: 20px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            display: inline-block;
            text-align: center;
        }

        .qr-wrapper img {
            width: 140px;
            height: 140px;
            margin-bottom: 10px;
        }

        .qr-label {
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--dark);
        }

        .contact-form-box {
            background: #fff;
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 10px 40px rgba(0,0,0,0.03);
        }

        .form-title {
            font-size: 1.4rem;
            font-weight: 700;
            margin-bottom: 25px;
            color: var(--dark);
        }

        .form-group {
            margin-bottom: 20px;
        }

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            background-color: var(--light);
            color: var(--text-main);
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            background-color: #fff;
            box-shadow: 0 0 0 3px var(--primary-glow);
        }

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

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

        .footer-brand h4 {
            color: #fff;
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.6;
        }

        .footer-links h5 {
            color: #fff;
            margin-bottom: 15px;
            font-size: 1rem;
        }

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

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

        .footer-links ul li a {
            font-size: 0.9rem;
        }

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

        /* Friendly Links */
        .friend-links-box {
            border-top: 1px solid #1e293b;
            padding-top: 25px;
            margin-bottom: 25px;
        }

        .friend-links-title {
            color: #fff;
            font-size: 0.9rem;
            margin-bottom: 12px;
            font-weight: 600;
        }

        .friend-links-flex {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }

        .friend-links-flex a {
            color: #64748b;
            font-size: 0.85rem;
        }

        .friend-links-flex a:hover {
            color: var(--secondary);
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 0.8rem;
        }

        .footer-bottom a.ai-page-home-link {
            color: var(--secondary);
            font-weight: bold;
        }

        /* Floating Widgets */
        .floating-widget {
            position: fixed;
            right: 25px;
            bottom: 25px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: #fff;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

        .float-btn:hover {
            transform: translateY(-3px);
            background: var(--primary);
            color: #fff;
        }

        .float-btn:hover svg {
            fill: #fff;
        }

        .float-btn svg {
            width: 24px;
            height: 24px;
            fill: var(--text-main);
            transition: var(--transition);
        }

        .float-qr-hover {
            position: absolute;
            bottom: 60px;
            right: 0;
            background: #fff;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            border: 1px solid var(--border-color);
            width: 160px;
        }

        .float-btn:hover .float-qr-hover {
            display: block;
        }

        .float-qr-hover img {
            width: 130px;
            height: 130px;
            margin-bottom: 5px;
        }

        /* Responsive Breakpoints */
        @media (max-width: 1024px) {
            .solutions-grid, .case-grid, .pricing-grid, .reviews-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .timeline {
                grid-template-columns: repeat(2, 1fr);
                gap: 30px;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: #fff;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero-title {
                font-size: 2.2rem;
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .contact-grid {
                grid-template-columns: 1fr;
            }
            .solutions-grid, .case-grid, .pricing-grid, .reviews-grid, .news-grid {
                grid-template-columns: 1fr;
            }
            .timeline {
                grid-template-columns: 1fr;
            }
        }