:root {
            --primary: #0d9488;
            --primary-light: #2dd4bf;
            --primary-dark: #0f766e;
            --primary-bg: #f0fdfa;
            --text-main: #0f172a;
            --text-muted: #475569;
            --text-light: #64748b;
            --bg-white: #ffffff;
            --bg-gray: #f8fafc;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
            --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
            --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        }

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

        html {
            font-family: var(--font-family);
            color: var(--text-main);
            background-color: var(--bg-gray);
            scroll-behavior: smooth;
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: var(--primary-dark);
        }

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

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.9);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border-color);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
        }

        .nav-wrapper {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 72px;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-main);
            letter-spacing: 1px;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
        }

        .nav-links a {
            color: var(--text-muted);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.3s;
        }

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

        .nav-links a.active {
            color: var(--primary);
            font-weight: 600;
        }

        .nav-btn {
            background-color: var(--primary);
            color: #fff !important;
            padding: 8px 18px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }

        .nav-btn:hover {
            background-color: var(--primary-dark);
            transform: translateY(-1px);
        }

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

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--text-main);
            border-radius: 2px;
            transition: 0.3s;
        }

        /* 移动端菜单展开状态 */
        .nav-links.active {
            display: flex;
        }

        /* 首屏 Hero 区域 (无图片) */
        .hero-section {
            padding-top: 140px;
            padding-bottom: 80px;
            background: radial-gradient(circle at 80% 20%, #f0fdfa 0%, #ffffff 60%);
            position: relative;
            overflow: hidden;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background-image: linear-gradient(var(--border-color) 1px, transparent 1px), linear-gradient(90deg, var(--border-color) 1px, transparent 1px);
            background-size: 40px 40px;
            opacity: 0.15;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .h1-wrap {
            display: inline-block;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            color: #fff;
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 20px;
            box-shadow: var(--shadow-sm);
        }

        h1 {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-main);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 36px;
            line-height: 1.7;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: #fff;
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            box-shadow: 0 4px 14px rgba(13, 148, 136, 0.4);
            transition: all 0.3s;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(13, 148, 136, 0.6);
            color: #fff;
        }

        .btn-secondary {
            background-color: #fff;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            padding: 14px 32px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            transition: all 0.3s;
        }

        .btn-secondary:hover {
            background-color: var(--bg-gray);
            border-color: #cbd5e1;
        }

        /* 首屏核心亮点标签 */
        .hero-badges {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 12px;
        }

        .badge-item {
            background: rgba(13, 148, 136, 0.08);
            border: 1px solid rgba(13, 148, 136, 0.2);
            color: var(--primary-dark);
            padding: 6px 14px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 500;
        }

        /* 通用 Section 样式 */
        section {
            padding: 80px 0;
            background-color: var(--bg-white);
        }

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

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 56px auto;
        }

        .section-header h2 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 48px;
            height: 4px;
            background: var(--primary);
            margin: 12px auto 0 auto;
            border-radius: 2px;
        }

        .section-header p {
            font-size: 16px;
            color: var(--text-light);
        }

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-bottom: 40px;
        }

        .stat-card {
            background-color: #fff;
            padding: 30px 20px;
            border-radius: var(--radius-md);
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

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

        .stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 服务能力卡片 */
        .services-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .service-card {
            background-color: #fff;
            padding: 36px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            transition: all 0.3s;
        }

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

        .service-icon {
            width: 48px;
            height: 48px;
            background-color: var(--primary-bg);
            color: var(--primary);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            margin-bottom: 24px;
            font-weight: bold;
        }

        .service-card h3 {
            font-size: 20px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--text-main);
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        /* 模型聚合展示 */
        .models-panel {
            background-color: #fff;
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .models-panel h3 {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 24px;
            text-align: center;
            font-weight: 600;
        }

        .models-tags {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 10px;
        }

        .model-tag {
            background-color: var(--bg-gray);
            border: 1px solid var(--border-color);
            color: var(--text-muted);
            padding: 8px 16px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
        }

        .model-tag:hover {
            background-color: var(--primary-bg);
            border-color: var(--primary-light);
            color: var(--primary-dark);
        }

        /* 一站式AIGC制作工作流 */
        .workflow-timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }

        .workflow-timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            bottom: 0;
            width: 2px;
            background-color: var(--border-color);
            transform: translateX(-50%);
        }

        .timeline-item {
            position: relative;
            width: 50%;
            padding: 20px 40px;
            box-sizing: border-box;
        }

        .timeline-item:nth-child(odd) {
            left: 0;
            text-align: right;
        }

        .timeline-item:nth-child(even) {
            left: 50%;
            text-align: left;
        }

        .timeline-dot {
            position: absolute;
            top: 30px;
            width: 16px;
            height: 16px;
            border-radius: 50%;
            background-color: var(--primary);
            border: 4px solid #fff;
            box-shadow: var(--shadow-sm);
            z-index: 2;
        }

        .timeline-item:nth-child(odd) .timeline-dot {
            right: -8px;
        }

        .timeline-item:nth-child(even) .timeline-dot {
            left: -8px;
        }

        .timeline-card {
            background-color: #fff;
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .timeline-card h3 {
            font-size: 18px;
            color: var(--primary-dark);
            margin-bottom: 8px;
        }

        .timeline-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 对比评测表格 */
        .comparison-table-wrapper {
            overflow-x: auto;
            background-color: #fff;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            margin-bottom: 40px;
        }

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

        .comparison-table th, .comparison-table td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        .comparison-table th {
            background-color: var(--bg-gray);
            font-weight: 600;
            color: var(--text-main);
        }

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

        .highlight-col {
            background-color: var(--primary-bg);
            font-weight: 600;
        }

        .rating-badge {
            display: inline-flex;
            align-items: center;
            background: linear-gradient(135deg, #f59e0b, #d97706);
            color: #fff;
            padding: 4px 10px;
            border-radius: var(--radius-sm);
            font-weight: 700;
            font-size: 14px;
        }

        /* 案例展示 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background-color: #fff;
            border-radius: var(--radius-md);
            overflow: hidden;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
            transition: all 0.3s;
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-md);
        }

        .case-img-wrap {
            width: 100%;
            height: 200px;
            overflow: hidden;
            background-color: var(--bg-gray);
        }

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

        .case-body {
            padding: 20px;
        }

        .case-tag {
            font-size: 12px;
            color: var(--primary);
            background-color: var(--primary-bg);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-body h3 {
            font-size: 16px;
            margin-bottom: 8px;
            color: var(--text-main);
        }

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

        /* 行业资讯 & 知识库 */
        .knowledge-section .container {
            display: grid;
            grid-template-columns: 2fr 1fr;
            gap: 40px;
        }

        .article-list {
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .article-card {
            background-color: #fff;
            padding: 20px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .article-card h3 {
            font-size: 18px;
            font-weight: 600;
        }

        .article-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        .article-card a {
            font-size: 14px;
            font-weight: 600;
            align-self: flex-start;
        }

        .wiki-card {
            background-color: #fff;
            padding: 30px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
        }

        .wiki-card h3 {
            font-size: 20px;
            margin-bottom: 20px;
            border-bottom: 2px solid var(--primary-bg);
            padding-bottom: 10px;
        }

        .wiki-list {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .wiki-list li {
            font-size: 14px;
            color: var(--text-muted);
            border-bottom: 1px dashed var(--border-color);
            padding-bottom: 8px;
        }

        .wiki-list li strong {
            color: var(--text-main);
        }

        /* 常见用户问题 FAQ */
        .faq-wrapper {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .faq-item {
            background-color: #fff;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            overflow: hidden;
            transition: all 0.3s;
        }

        .faq-question {
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-question::after {
            content: '+';
            font-size: 20px;
            color: var(--text-light);
            transition: transform 0.3s;
        }

        .faq-item.active .faq-question::after {
            content: '−';
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out, padding 0.3s ease;
            background-color: var(--bg-gray);
            border-top: 0px solid var(--border-color);
        }

        .faq-item.active .faq-answer {
            max-height: 200px;
            padding: 18px 24px;
            border-top-width: 1px;
        }

        .faq-answer p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 客户评论卡片 */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .testimonial-card {
            background-color: #fff;
            padding: 30px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

        .testimonial-content {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .author-avatar {
            width: 40px;
            height: 40px;
            background-color: var(--primary-bg);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 600;
            color: var(--primary-dark);
            font-size: 14px;
        }

        .author-info h4 {
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
        }

        .author-info span {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 需求匹配表单 & 联系我们 */
        .contact-section .container {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: start;
        }

        .contact-info-wrap {
            display: flex;
            flex-direction: column;
            gap: 24px;
        }

        .info-card {
            background-color: #fff;
            padding: 24px;
            border-radius: var(--radius-md);
            border: 1px solid var(--border-color);
            display: flex;
            gap: 16px;
        }

        .info-icon {
            font-size: 24px;
            color: var(--primary);
        }

        .info-details h4 {
            font-size: 16px;
            margin-bottom: 6px;
        }

        .info-details p, .info-details a {
            font-size: 14px;
            color: var(--text-muted);
        }

        .qr-codes {
            display: flex;
            gap: 24px;
            margin-top: 10px;
        }

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

        .qr-item img {
            width: 110px;
            height: 110px;
            border: 1px solid var(--border-color);
            padding: 4px;
            border-radius: var(--radius-sm);
            background-color: #fff;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* 表单样式 */
        .form-card {
            background-color: #fff;
            padding: 40px;
            border-radius: var(--radius-lg);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-sm);
        }

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

        .form-group label {
            display: block;
            font-size: 14px;
            font-weight: 600;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            font-size: 14px;
            color: var(--text-main);
            transition: all 0.3s;
            font-family: inherit;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.1);
        }

        select.form-control {
            appearance: none;
            background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23475569' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'/%3E%3C/svg%3E");
            background-repeat: no-repeat;
            background-position: right 16px center;
            background-size: 16px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--primary);
            color: #fff;
            border: none;
            padding: 14px;
            border-radius: var(--radius-sm);
            font-size: 16px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.3s;
        }

        .btn-submit:hover {
            background-color: var(--primary-dark);
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 30px 0;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand h3 {
            color: #fff;
            margin-bottom: 16px;
            font-size: 20px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-links h4 {
            color: #fff;
            font-size: 16px;
            margin-bottom: 20px;
        }

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

        .footer-links ul li a {
            color: #94a3b8;
            font-size: 14px;
        }

        .footer-links ul li a:hover {
            color: var(--primary-light);
        }

        .friend-links-area {
            border-top: 1px solid #1e293b;
            padding: 24px 0;
            font-size: 13px;
        }

        .friend-links-area strong {
            color: #fff;
            margin-right: 12px;
        }

        .friend-links-area a {
            color: #64748b;
            margin-right: 16px;
            display: inline-block;
        }

        .friend-links-area a:hover {
            color: var(--primary-light);
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        /* 侧边悬浮浮窗 */
        .sidebar-widget {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }

        .widget-item {
            width: 48px;
            height: 48px;
            background-color: #fff;
            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: all 0.3s;
            position: relative;
        }

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

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

        .widget-tooltip {
            position: absolute;
            right: 60px;
            background-color: #fff;
            color: var(--text-main);
            border: 1px solid var(--border-color);
            border-radius: var(--radius-sm);
            padding: 12px;
            box-shadow: var(--shadow-lg);
            display: none;
            width: 140px;
            text-align: center;
        }

        .widget-item:hover .widget-tooltip {
            display: block;
        }

        .widget-tooltip img {
            width: 100%;
            margin-bottom: 6px;
        }

        .widget-tooltip p {
            font-size: 12px;
            font-weight: 600;
        }

        /* 响应式调整 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .services-grid, .case-grid, .testimonials-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .contact-section .container {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .knowledge-section .container {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 768px) {
            .nav-links {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 72px;
                left: 0;
                width: 100%;
                background-color: #fff;
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 16px;
                box-shadow: var(--shadow-md);
            }
            .menu-toggle {
                display: flex;
            }
            h1 {
                font-size: 32px;
            }
            .hero-btn-group {
                flex-direction: column;
                gap: 12px;
            }
            .services-grid, .case-grid, .testimonials-grid {
                grid-template-columns: 1fr;
            }
            .workflow-timeline::before {
                left: 20px;
            }
            .timeline-item {
                width: 100%;
                padding: 20px 20px 20px 40px;
            }
            .timeline-item:nth-child(odd), .timeline-item:nth-child(even) {
                left: 0;
                text-align: left;
            }
            .timeline-item:nth-child(odd) .timeline-dot, .timeline-item:nth-child(even) .timeline-dot {
                left: 12px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }