:root {
            --primary: #6366f1;
            --primary-hover: #4f46e5;
            --secondary: #ec4899;
            --accent: #8b5cf6;
            --dark: #0f172a;
            --light: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-600: #475569;
            --gray-800: #1e293b;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --border-radius: 16px;
        }

        * {
            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(--dark);
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* Layout Container */
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* Navigation */
        .header {
            position: sticky;
            top: 0;
            background: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--gray-200);
            z-index: 1000;
        }

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

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

        .ai-page-logo {
            height: 40px;
            width: auto;
        }

        .brand-name {
            font-size: 1.25rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-menu a {
            color: var(--gray-600);
            text-decoration: none;
            font-weight: 500;
            transition: var(--transition);
            font-size: 0.95rem;
        }

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

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 10px 20px;
            border-radius: 9999px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            border: none;
            cursor: pointer;
            font-size: 0.9rem;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: white;
            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-color: white;
            color: var(--dark);
            border: 2px solid var(--dark);
        }

        .btn-secondary:hover {
            background-color: var(--dark);
            color: white;
        }

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
        }

        /* Section Global Settings */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-tag {
            display: inline-block;
            padding: 6px 12px;
            background: rgba(99, 102, 241, 0.1);
            color: var(--primary);
            font-weight: 700;
            border-radius: 9999px;
            font-size: 0.85rem;
            text-transform: uppercase;
            letter-spacing: 1px;
            margin-bottom: 12px;
        }

        .section-title {
            font-size: 2.25rem;
            font-weight: 800;
            color: var(--gray-800);
            margin-bottom: 15px;
        }

        .section-desc {
            color: var(--gray-600);
            font-size: 1.1rem;
        }

        /* Hero (First screen) - Strictly NO Images */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(236, 72, 153, 0.1), transparent 40%),
                        radial-gradient(circle at 20% 80%, rgba(99, 102, 241, 0.15), transparent 50%),
                        var(--light);
            padding: 120px 0 100px 0;
            text-align: center;
        }

        .hero-badge {
            background: linear-gradient(90deg, rgba(99, 102, 241, 0.1), rgba(236, 72, 153, 0.1));
            border: 1px solid rgba(99, 102, 241, 0.2);
            padding: 8px 16px;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 600;
            color: var(--accent);
            display: inline-block;
            margin-bottom: 25px;
        }

        .hero-title-main {
            font-size: 3rem;
            font-weight: 900;
            line-height: 1.2;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .hero-title-main span {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-subtitle {
            font-size: 1.25rem;
            color: var(--gray-600);
            max-width: 800px;
            margin: 0 auto 40px auto;
        }

        .hero-cta {
            display: flex;
            justify-content: center;
            gap: 15px;
            flex-wrap: wrap;
        }

        /* Data Metrics Card */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 60px;
        }

        .metric-card {
            background: white;
            padding: 30px 20px;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            border: 1px solid var(--gray-200);
            text-align: center;
            transition: var(--transition);
        }

        .metric-card:hover {
            transform: translateY(-5px);
            border-color: var(--primary);
        }

        .metric-num {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .metric-label {
            font-size: 0.95rem;
            color: var(--gray-600);
            font-weight: 500;
        }

        /* About Us (关于我们) & Platform Intro (平台介绍) */
        .about-section {
            background-color: white;
        }

        .about-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            margin-top: 30px;
        }

        .about-feature-item {
            background-color: var(--light);
            padding: 20px;
            border-radius: 12px;
            border-left: 4px solid var(--secondary);
        }

        .about-feature-item h4 {
            margin-bottom: 8px;
            color: var(--dark);
        }

        /* Service Cards (全平台AIGC服务 & 一站式制作) */
        .services-section {
            background-color: var(--light);
        }

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

        .service-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 40px 30px;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            transform: scaleX(0);
            transition: var(--transition);
            transform-origin: left;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0,0,0,0.05);
        }

        .service-card:hover::before {
            transform: scaleX(1);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 12px;
            color: var(--gray-800);
        }

        .service-card p {
            color: var(--gray-600);
            font-size: 0.95rem;
        }

        /* Model Integration Carousel/Cloud */
        .models-cloud {
            background-color: var(--dark);
            color: white;
            padding: 60px 0;
            overflow: hidden;
            position: relative;
        }

        .models-cloud-title {
            text-align: center;
            font-size: 1.5rem;
            margin-bottom: 30px;
            color: var(--gray-200);
            font-weight: 700;
        }

        .tags-wrapper {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 1000px;
            margin: 0 auto;
        }

        .model-tag {
            background: rgba(255, 255, 255, 0.1);
            color: white;
            padding: 8px 18px;
            border-radius: 9999px;
            font-size: 0.9rem;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .model-tag:hover {
            background: var(--secondary);
            transform: scale(1.05);
            border-color: var(--secondary);
        }

        /* Solutions (全行业解决方案) */
        .solutions-section {
            background-color: white;
        }

        .solution-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            margin-bottom: 60px;
        }

        .solution-row:nth-child(even) {
            direction: rtl;
        }

        .solution-row:nth-child(even) .solution-text {
            direction: ltr;
        }

        .solution-image-container {
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .solution-image-container img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
            object-fit: cover;
        }

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

        /* Steps & Network (标准化流程 + 全国服务网络) */
        .network-section {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.05), rgba(236, 72, 153, 0.05));
        }

        .steps-flow {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 40px;
        }

        .step-item {
            background: white;
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--gray-200);
            position: relative;
            z-index: 1;
        }

        .step-num {
            position: absolute;
            top: 15px;
            right: 15px;
            font-size: 2.5rem;
            font-weight: 800;
            color: rgba(99, 102, 241, 0.1);
            z-index: -1;
        }

        /* Tech Standards (技术标准) */
        .tech-standards-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
            margin-top: 40px;
        }

        .tech-card {
            background: white;
            padding: 30px;
            border-radius: var(--border-radius);
            border-left: 6px solid var(--primary);
            box-shadow: 0 4px 15px rgba(0,0,0,0.01);
        }

        /* Cases (客户案例中心) */
        .cases-section {
            background: white;
        }

        .case-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .case-card {
            background: var(--light);
            border-radius: var(--border-radius);
            overflow: hidden;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.06);
        }

        .case-img-wrap {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }

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

        .case-content {
            padding: 25px;
        }

        .case-tag {
            font-size: 0.75rem;
            color: var(--secondary);
            font-weight: 700;
            margin-bottom: 8px;
            display: inline-block;
        }

        /* Comparison Evaluation (对比评测) */
        .comparison-section {
            background-color: var(--light);
        }

        .evaluation-highlight {
            background: linear-gradient(135deg, var(--dark), var(--gray-800));
            color: white;
            border-radius: var(--border-radius);
            padding: 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 20px;
        }

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

        .stars {
            color: #fbbf24;
            font-size: 1.5rem;
        }

        .score-big {
            font-size: 3.5rem;
            font-weight: 900;
            color: var(--secondary);
            line-height: 1;
        }

        .compare-table-wrapper {
            overflow-x: auto;
            background: white;
            border-radius: var(--border-radius);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
            border: 1px solid var(--gray-200);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 700px;
        }

        .compare-table th, .compare-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--gray-200);
        }

        .compare-table th {
            background-color: var(--gray-100);
            font-weight: 700;
            color: var(--dark);
        }

        .compare-table tr:hover {
            background-color: rgba(99, 102, 241, 0.02);
        }

        .badge-success {
            display: inline-block;
            background: rgba(16, 185, 129, 0.1);
            color: #10b981;
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        .badge-warning {
            display: inline-block;
            background: rgba(245, 158, 11, 0.1);
            color: #f59e0b;
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            font-size: 0.8rem;
        }

        /* Token Price Reference (Token比价参考) */
        .token-section {
            background: white;
        }

        /* Training / Vocational Certificate (职业技术培训 & 人工智能培训) */
        .training-section {
            background: var(--light);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .training-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            border: 1px solid var(--gray-200);
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--primary);
            box-shadow: 0 10px 25px rgba(0,0,0,0.05);
        }

        .cert-org {
            font-size: 0.8rem;
            color: var(--gray-600);
            font-weight: 700;
            background: var(--gray-100);
            padding: 4px 8px;
            border-radius: 4px;
            margin-bottom: 12px;
            display: inline-block;
        }

        /* FAQ (常见用户问题 FAQ & 自助排查 & 百科) */
        .faq-section {
            background: white;
        }

        .faq-layout {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .faq-item {
            background: var(--light);
            border-radius: 8px;
            border: 1px solid var(--gray-200);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-header {
            padding: 20px;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

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

        .faq-item.active .faq-header::after {
            content: '-';
            transform: rotate(90deg);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background: white;
        }

        .faq-content {
            padding: 20px;
            color: var(--gray-600);
            border-top: 1px solid var(--gray-200);
        }

        /* AI Dictionary & Troubleshooting Info Card */
        .sidebar-card {
            background: linear-gradient(135deg, rgba(99, 102, 241, 0.02), rgba(236, 72, 153, 0.02));
            border: 2px dashed var(--gray-200);
            border-radius: var(--border-radius);
            padding: 30px;
        }

        .sidebar-card h3 {
            margin-bottom: 20px;
            font-size: 1.25rem;
        }

        .glossary-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .glossary-list dt {
            font-weight: 700;
            color: var(--primary);
        }

        .glossary-list dd {
            font-size: 0.85rem;
            color: var(--gray-600);
            margin-left: 0;
            margin-bottom: 8px;
        }

        /* Reviews (客户评论卡片) */
        .reviews-section {
            background: var(--light);
        }

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

        .review-card {
            background: white;
            border-radius: var(--border-radius);
            padding: 30px;
            border: 1px solid var(--gray-200);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            color: var(--gray-600);
            font-style: italic;
            margin-bottom: 20px;
            font-size: 0.95rem;
        }

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

        .user-avatar-placeholder {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }

        .user-info h4 {
            font-size: 0.95rem;
            color: var(--dark);
        }

        .user-info span {
            font-size: 0.8rem;
            color: var(--gray-600);
        }

        /* Articles (新闻/知识库) */
        .articles-section {
            background: white;
        }

        .articles-list {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .article-card {
            border: 1px solid var(--gray-200);
            border-radius: 12px;
            padding: 24px;
            background: white;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card:hover {
            box-shadow: 0 8px 20px rgba(0,0,0,0.05);
            border-color: var(--secondary);
        }

        .article-title {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-link {
            text-decoration: none;
            color: var(--primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 5px;
            margin-top: 15px;
        }

        /* Interactive Form & Contact & Franchise (加盟代理 + 联系我们) */
        .contact-section {
            background: linear-gradient(135deg, #0f172a, #1e293b);
            color: white;
        }

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

        .contact-info-block {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-item {
            margin-bottom: 25px;
        }

        .contact-item h4 {
            color: var(--secondary);
            font-size: 1.1rem;
            margin-bottom: 8px;
        }

        .contact-qrcode {
            background: white;
            padding: 10px;
            border-radius: 8px;
            width: 130px;
            height: 130px;
            margin-top: 15px;
        }

        .contact-qrcode img {
            width: 100%;
            height: 100%;
            object-fit: contain;
        }

        .contact-form-card {
            background: rgba(255, 255, 255, 0.05);
            backdrop-filter: blur(10px);
            padding: 40px;
            border-radius: var(--border-radius);
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--gray-200);
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.2);
            background: rgba(255, 255, 255, 0.08);
            color: white;
            font-size: 0.95rem;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--secondary);
            background: rgba(255, 255, 255, 0.15);
        }

        select.form-control option {
            background-color: var(--dark);
            color: white;
        }

        /* Footer */
        .footer {
            background-color: #080c14;
            color: var(--gray-600);
            padding: 60px 0 30px 0;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
        }

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

        .footer-brand h3 {
            color: white;
            margin-bottom: 15px;
        }

        .footer-links h4 {
            color: white;
            margin-bottom: 15px;
            font-size: 1rem;
        }

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

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

        .footer-links a {
            color: var(--gray-600);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: white;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.05);
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 20px;
        }

        .friend-links a {
            color: var(--gray-600);
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

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

        .ai-page-home-link {
            color: var(--primary) !important;
            font-weight: 700;
        }

        /* Sticky widgets */
        .sticky-widgets {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 10px;
            z-index: 999;
        }

        .widget-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: white;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            color: var(--dark);
            font-weight: 700;
            transition: var(--transition);
            cursor: pointer;
            border: none;
        }

        .widget-btn:hover {
            background: var(--primary);
            color: white;
            transform: scale(1.1);
        }

        .widget-kefu-pop {
            display: none;
            position: absolute;
            bottom: 60px;
            right: 0;
            background: white;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 20px rgba(0,0,0,0.2);
            text-align: center;
            width: 160px;
        }

        .widget-btn-kefu:hover + .widget-kefu-pop,
        .widget-kefu-pop:hover {
            display: block;
        }

        /* Mobile adaptation */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--gray-200);
            }

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

            .menu-toggle {
                display: block;
            }

            .about-layout, .contact-layout, .solution-row {
                grid-template-columns: 1fr;
            }

            .solution-row:nth-child(even) {
                direction: ltr;
            }

            .grid-3, .training-grid, .reviews-grid, .articles-list {
                grid-template-columns: 1fr 1fr;
            }

            .metrics-grid {
                grid-template-columns: 1fr 1fr;
            }

            .case-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .grid-3, .training-grid, .reviews-grid, .articles-list, .metrics-grid, .faq-layout {
                grid-template-columns: 1fr;
            }

            .hero-title-main {
                font-size: 2rem;
            }

            .steps-flow {
                grid-template-columns: 1fr;
            }
        }