:root {
            --primary: #10b981;
            --primary-hover: #059669;
            --primary-light: #ecfdf5;
            --dark: #0f172a;
            --gray-dark: #1e293b;
            --gray-light: #f8fafc;
            --gray-border: #e2e8f0;
            --text-main: #334155;
            --text-muted: #64748b;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        html {
            scroll-behavior: smooth;
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            color: var(--text-main);
            background-color: #ffffff;
        }

        body {
            line-height: 1.6;
            overflow-x: hidden;
        }

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* 顶部导航 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 70px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            border-bottom: 1px solid var(--gray-border);
            z-index: 1000;
            transition: var(--transition);
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }

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

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

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: 0.5px;
        }

        .logo-text span {
            color: var(--primary);
        }

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

        .nav-link {
            text-decoration: none;
            color: var(--text-main);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            padding: 5px 0;
            position: relative;
        }

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

        .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }

        .nav-link:hover::after {
            width: 100%;
        }

        .nav-btn {
            background: var(--primary);
            color: #white;
            padding: 8px 18px;
            border-radius: 6px;
            font-size: 14px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            color: #fff;
        }

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

        .menu-toggle {
            display: none;
            background: none;
            border: none;
            cursor: pointer;
            padding: 5px;
        }

        .menu-toggle span {
            display: block;
            width: 25px;
            height: 3px;
            background: var(--dark);
            margin: 5px 0;
            transition: var(--transition);
        }

        /* 核心区 Section */
        section {
            padding: 80px 0;
            position: relative;
        }

        .section-title-box {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 20px;
            font-size: 12px;
            font-weight: 600;
            margin-bottom: 10px;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .section-title {
            font-size: 32px;
            color: var(--dark);
            font-weight: 700;
            margin-bottom: 15px;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-muted);
            max-width: 600px;
            margin: 0 auto;
        }

        /* Hero首屏 - 严禁出现任何图片 */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, #f0fdf4 0%, #ffffff 100%);
            text-align: center;
            overflow: hidden;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(16, 185, 129, 0.1);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 25px;
            border: 1px solid rgba(16, 185, 129, 0.2);
        }

        .hero-title {
            font-size: 46px;
            line-height: 1.25;
            color: var(--dark);
            margin-bottom: 20px;
            font-weight: 800;
        }

        .hero-title span {
            color: var(--primary);
            position: relative;
        }

        .hero-desc {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 35px;
            line-height: 1.8;
        }

        .hero-buttons {
            display: flex;
            gap: 15px;
            justify-content: center;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

        .btn {
            padding: 14px 28px;
            border-radius: 8px;
            font-size: 16px;
            font-weight: 600;
            text-decoration: none;
            transition: var(--transition);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: var(--primary);
            color: white;
            box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
        }

        .btn-primary:hover {
            background: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
        }

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

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

        /* 平台聚合标签云 */
        .hero-tags {
            margin-top: 30px;
        }

        .hero-tags-title {
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
        }

        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            justify-content: center;
            max-width: 700px;
            margin: 0 auto;
        }

        .tag-item {
            font-size: 12px;
            background: #ffffff;
            color: var(--text-main);
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid var(--gray-border);
            transition: var(--transition);
        }

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

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: 50px;
            text-align: center;
        }

        .stat-card {
            background: white;
            padding: 25px 20px;
            border-radius: 12px;
            border: 1px solid var(--gray-border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            transition: var(--transition);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
            border-color: var(--primary);
        }

        .stat-num {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* 平台介绍 */
        .intro-section {
            background: var(--gray-light);
        }

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

        .intro-content h3 {
            font-size: 26px;
            color: var(--dark);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .intro-content p {
            color: var(--text-main);
            margin-bottom: 15px;
            font-size: 15px;
            line-height: 1.7;
        }

        .intro-features {
            margin-top: 25px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 15px;
        }

        .intro-feat-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--dark);
        }

        .intro-feat-item svg {
            color: var(--primary);
            flex-shrink: 0;
        }

        .intro-media {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
        }

        .intro-media img {
            width: 100%;
            height: auto;
            display: block;
            transition: var(--transition);
        }

        .intro-media:hover img {
            transform: scale(1.03);
        }

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

        .service-card {
            background: white;
            border: 1px solid var(--gray-border);
            border-radius: 12px;
            padding: 35px 25px;
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .service-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 4px;
            height: 100%;
            background: var(--primary);
            transform: scaleY(0);
            transition: var(--transition);
            transform-origin: bottom;
        }

        .service-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            border-color: var(--primary);
        }

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

        .service-icon {
            width: 50px;
            height: 50px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            margin-bottom: 20px;
        }

        .service-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
        }

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

        /* 流程步骤 */
        .process-section {
            background: var(--gray-light);
        }

        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

        .step-card {
            background: white;
            padding: 30px 20px;
            border-radius: 12px;
            border: 1px solid var(--gray-border);
            text-align: center;
            position: relative;
            z-index: 2;
        }

        .step-num {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px auto;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
        }

        .step-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
        }

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

        /* 对比评测表格 */
        .table-responsive {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--gray-border);
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
        }

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

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

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

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

        .compare-table td strong {
            color: var(--dark);
        }

        .highlight-col {
            background: rgba(16, 185, 129, 0.03);
            font-weight: 600;
        }

        .star-rating {
            color: #fbbf24;
            font-weight: bold;
        }

        .score-badge {
            background: var(--primary);
            color: white;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 12px;
            font-weight: bold;
        }

        /* 案例与最新资讯 */
        .grid-two-cols {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .case-list, .article-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .list-card {
            background: white;
            border: 1px solid var(--gray-border);
            border-radius: 8px;
            padding: 20px;
            display: flex;
            gap: 15px;
            transition: var(--transition);
            text-decoration: none;
            color: inherit;
        }

        .list-card:hover {
            border-color: var(--primary);
            transform: translateX(5px);
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
        }

        .list-img {
            width: 100px;
            height: 100px;
            border-radius: 6px;
            overflow: hidden;
            flex-shrink: 0;
        }

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

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

        .list-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 5px;
        }

        .list-meta {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* AI 培训业务 */
        .training-section {
            background: var(--gray-light);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 15px;
        }

        .train-card {
            background: white;
            border: 1px solid var(--gray-border);
            border-radius: 8px;
            padding: 20px;
            text-align: center;
            transition: var(--transition);
        }

        .train-card:hover {
            border-color: var(--primary);
            box-shadow: 0 8px 16px rgba(0,0,0,0.05);
            transform: translateY(-3px);
        }

        .train-icon {
            width: 40px;
            height: 40px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px auto;
        }

        .train-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .train-desc {
            font-size: 11px;
            color: var(--text-muted);
        }

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

        .review-card {
            background: white;
            border: 1px solid var(--gray-border);
            border-radius: 12px;
            padding: 25px;
            box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .review-text {
            font-size: 14px;
            color: var(--text-main);
            line-height: 1.6;
            margin-bottom: 20px;
            font-style: italic;
        }

        .review-user {
            display: flex;
            align-items: center;
            gap: 12px;
            border-top: 1px solid var(--gray-border);
            padding-top: 15px;
        }

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

        .user-info {
            display: flex;
            flex-direction: column;
        }

        .user-name {
            font-size: 14px;
            font-weight: 700;
            color: var(--dark);
        }

        .user-role {
            font-size: 12px;
            color: var(--text-muted);
        }

        /* FAQ折叠面板 */
        .faq-section {
            background: var(--gray-light);
        }

        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

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

        .faq-header {
            padding: 18px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
        }

        .faq-question {
            font-size: 16px;
            font-weight: 700;
            color: var(--dark);
        }

        .faq-icon {
            transition: transform 0.3s;
        }

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

        .faq-content {
            padding: 20px 24px;
            font-size: 14px;
            color: var(--text-main);
            border-top: 1px solid var(--gray-border);
            line-height: 1.7;
        }

        .faq-item.active .faq-body {
            max-height: 300px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(180deg);
        }

        /* 需求匹配与联系我们表单 */
        .form-section {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: flex-start;
        }

        .contact-info-panel {
            background: var(--dark);
            color: white;
            padding: 40px;
            border-radius: 16px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-info-panel h3 {
            font-size: 28px;
            margin-bottom: 20px;
            color: white;
        }

        .contact-info-list {
            margin: 30px 0;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .contact-item {
            display: flex;
            align-items: flex-start;
            gap: 15px;
        }

        .contact-icon-box {
            width: 40px;
            height: 40px;
            background: rgba(255,255,255,0.1);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            flex-shrink: 0;
        }

        .contact-text-box h4 {
            font-size: 14px;
            color: rgba(255,255,255,0.6);
            margin-bottom: 4px;
        }

        .contact-text-box p {
            font-size: 16px;
            font-weight: 500;
        }

        .qr-codes {
            display: flex;
            gap: 20px;
            margin-top: 20px;
        }

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

        .qr-item img {
            width: 90px;
            height: 90px;
            border-radius: 8px;
            background: white;
            padding: 5px;
            margin-bottom: 8px;
        }

        .qr-item p {
            font-size: 11px;
            color: rgba(255,255,255,0.6);
        }

        .form-panel {
            background: white;
            border: 1px solid var(--gray-border);
            padding: 40px;
            border-radius: 16px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.03);
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--gray-border);
            border-radius: 8px;
            font-size: 14px;
            color: var(--dark);
            transition: var(--transition);
            background: var(--gray-light);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background: white;
            box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
        }

        textarea.form-control {
            resize: vertical;
            min-height: 120px;
        }

        /* 页脚 */
        footer {
            background: var(--gray-dark);
            color: #94a3b8;
            padding: 60px 0 20px 0;
            border-top: 1px solid #334155;
        }

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

        .footer-logo-desc p {
            margin: 15px 0;
            font-size: 14px;
            line-height: 1.6;
        }

        .footer-title {
            color: white;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }

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

        .footer-links li {
            margin-bottom: 12px;
        }

        .footer-links a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--primary);
            padding-left: 5px;
        }

        .footer-bottom {
            border-top: 1px solid #334155;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            font-size: 13px;
        }

        .friend-links {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            align-items: center;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            transition: var(--transition);
        }

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

        .ai-page-home-link {
            color: var(--primary);
            text-decoration: none;
            font-weight: bold;
        }

        /* 浮动客服 */
        .float-contact {
            position: fixed;
            bottom: 30px;
            right: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            background: var(--primary);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: var(--transition);
            position: relative;
        }

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

        .float-tooltip {
            position: absolute;
            right: 60px;
            background: white;
            color: var(--dark);
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 12px;
            white-space: nowrap;
            box-shadow: 0 4px 10px rgba(0,0,0,0.1);
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            border: 1px solid var(--gray-border);
        }

        .float-btn:hover .float-tooltip {
            opacity: 1;
            visibility: visible;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .services-grid, .reviews-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            header {
                height: 60px;
            }
            .menu-toggle {
                display: block;
            }
            .nav-menu {
                position: fixed;
                top: 60px;
                left: 100%;
                width: 100%;
                height: calc(100vh - 60px);
                background: white;
                flex-direction: column;
                padding: 40px;
                transition: var(--transition);
                box-shadow: 0 10px 15px rgba(0,0,0,0.1);
                overflow-y: auto;
            }
            .nav-menu.active {
                left: 0;
            }
            .intro-grid, .grid-two-cols, .form-section {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .training-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-title {
                font-size: 32px;
            }
            .hero-desc {
                font-size: 15px;
            }
        }

        @media (max-width: 480px) {
            .services-grid, .reviews-grid, .training-grid {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
        }