:root {
            --primary: #007A87;
            --primary-light: #e0f2f1;
            --secondary: #00b4d8;
            --accent: #00f5d4;
            --dark: #12252a;
            --text-main: #2c3e50;
            --text-muted: #607d8b;
            --bg-light: #f4f8f8;
            --bg-white: #ffffff;
            --border-color: #e0e7e9;
            --shadow: 0 8px 30px rgba(0, 122, 135, 0.06);
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

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

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

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

        /* 统一页面容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 20px;
        }

        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
            background-color: var(--bg-white);
        }

        section:nth-child(even) {
            background-color: var(--bg-light);
        }

        /* 章节标题 */
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--dark);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
            font-weight: 700;
        }

        .section-header h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--secondary));
            border-radius: 2px;
        }

        .section-header p {
            color: var(--text-muted);
            margin-top: 15px;
            font-size: 1.1rem;
        }

        /* 顶部导航 */
        header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 1000;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
            border-bottom: 1px solid var(--border-color);
        }

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

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

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

        .nav-links {
            display: flex;
            gap: 20px;
            align-items: center;
        }

        .nav-links a {
            font-size: 0.95rem;
            color: var(--text-main);
            font-weight: 500;
            padding: 5px 10px;
            border-radius: 4px;
        }

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

        .nav-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            color: var(--dark);
            cursor: pointer;
        }

        /* Hero首屏 - 科技渐变无图 */
        .hero {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 245, 212, 0.08) 0%, transparent 55%),
                        radial-gradient(circle at 10% 80%, rgba(0, 180, 216, 0.08) 0%, transparent 55%),
                        var(--bg-white);
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 1px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }

        .hero-badge {
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 25px;
            box-shadow: 0 4px 10px rgba(0, 122, 135, 0.1);
        }

        .hero h1 {
            font-size: 3rem;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 25px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--dark) 30%, var(--primary) 100%);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

        .hero-desc {
            font-size: 1.25rem;
            color: var(--text-muted);
            max-width: 800px;
            margin: 0 auto 40px;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 60px;
        }

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

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--bg-white);
            box-shadow: 0 4px 15px rgba(0, 122, 135, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(0, 122, 135, 0.4);
            color: var(--bg-white);
        }

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

        .btn-secondary:hover {
            background-color: var(--primary-light);
            color: var(--primary);
            border-color: var(--primary);
        }

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

        .stat-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 25px 20px;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
        }

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

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

        .about-content p {
            margin-bottom: 15px;
            color: var(--text-main);
        }

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

        .about-feature-item {
            display: flex;
            align-items: center;
            gap: 10px;
            font-weight: 600;
            color: var(--dark);
        }

        .about-feature-item i {
            color: var(--primary);
            font-size: 1.2rem;
        }

        /* 平台与服务体系 */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
        }

        .service-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }

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

        .service-icon {
            width: 50px;
            height: 50px;
            background-color: var(--primary-light);
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 1.5rem;
            font-weight: bold;
            margin-bottom: 20px;
        }

        .service-card h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

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

        /* 支持的平台标志云 */
        .platform-cloud {
            margin-top: 50px;
            background-color: var(--bg-light);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
        }

        .platform-cloud h4 {
            margin-bottom: 20px;
            color: var(--dark);
        }

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

        .platform-tag {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            color: var(--text-main);
            transition: var(--transition);
        }

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

        /* 自动化制作流程与步骤 */
        .step-timeline {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            position: relative;
        }

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

        .step-num {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: var(--bg-white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            margin: 0 auto 20px;
        }

        .step-item h3 {
            font-size: 1.15rem;
            margin-bottom: 10px;
            color: var(--dark);
        }

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

        /* 技术标准 */
        .tech-standards {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .standard-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
        }

        .standard-list {
            list-style: none;
            margin-top: 20px;
        }

        .standard-list li {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
        }

        .standard-list li:last-child {
            border-bottom: none;
        }

        .standard-label {
            font-weight: 600;
            color: var(--dark);
        }

        .standard-value {
            color: var(--primary);
            font-weight: 500;
        }

        /* 案例中心 */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

        .case-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
        }

        .case-img-container {
            width: 100%;
            aspect-ratio: 16/9;
            overflow: hidden;
            background-color: var(--primary-light);
            position: relative;
        }

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

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            font-size: 0.8rem;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 3px 8px;
            border-radius: 4px;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-info h3 {
            font-size: 1.15rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

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

        /* 对比评测 */
        .compare-section {
            background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
        }

        .compare-score-box {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            margin-bottom: 40px;
            box-shadow: var(--shadow);
        }

        .rating-num {
            font-size: 4rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1;
        }

        .rating-stars {
            color: #ffb300;
            font-size: 1.5rem;
            margin: 10px 0;
        }

        .compare-table-wrapper {
            width: 100%;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow);
            background-color: var(--bg-white);
        }

        .compare-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
            min-width: 800px;
        }

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

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

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

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

        /* 价格与Token比价 */
        .token-price-wrapper {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
        }

        .token-table {
            width: 100%;
            border-collapse: collapse;
            margin-top: 20px;
        }

        .token-table th, .token-table td {
            padding: 12px 15px;
            border-bottom: 1px solid var(--border-color);
            text-align: left;
        }

        .token-table th {
            font-weight: 600;
            color: var(--dark);
        }

        .token-ratio {
            color: #4caf50;
            font-weight: 600;
        }

        /* 培训业务 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .training-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .training-card:hover {
            border-color: var(--primary);
        }

        .training-card h3 {
            font-size: 1.3rem;
            color: var(--dark);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .training-card h3 span {
            font-size: 0.8rem;
            background-color: var(--primary-light);
            color: var(--primary);
            padding: 2px 8px;
            border-radius: 4px;
        }

        .training-features {
            list-style: none;
            margin-top: 15px;
        }

        .training-features li {
            padding: 5px 0;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* FAQ折叠面板 */
        .faq-accordion {
            max-width: 800px;
            margin: 0 auto;
        }

        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 8px;
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: 0 2px 8px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .faq-question {
            padding: 20px;
            font-weight: 600;
            color: var(--dark);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            user-select: none;
        }

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

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

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease-out;
            background-color: #fafdfd;
        }

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

        /* 自助排查 & 百科 */
        .tools-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
        }

        .term-box, .troubleshoot-box {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
        }

        .term-list dt {
            font-weight: 700;
            color: var(--primary);
            margin-top: 15px;
        }

        .term-list dd {
            margin-bottom: 15px;
            color: var(--text-muted);
            font-size: 0.9rem;
        }

        .troubleshoot-list {
            list-style: none;
        }

        .troubleshoot-list li {
            padding: 10px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .troubleshoot-list li strong {
            color: var(--dark);
            display: block;
            margin-bottom: 4px;
        }

        .troubleshoot-list li span {
            font-size: 0.9rem;
            color: var(--text-muted);
        }

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

        .review-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            box-shadow: var(--shadow);
            position: relative;
        }

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

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

        .author-avatar {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            color: var(--primary);
        }

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

        .author-info p {
            font-size: 0.8rem;
            color: var(--text-muted);
        }

        /* 资讯与知识库 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 30px;
        }

        .news-list {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
        }

        .news-item {
            padding: 12px 0;
            border-bottom: 1px solid var(--border-color);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .news-item:last-child {
            border-bottom: none;
        }

        .news-item a {
            color: var(--text-main);
            font-weight: 500;
        }

        .news-item a:hover {
            color: var(--primary);
        }

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

        /* 表单与智能需求匹配 */
        .contact-section {
            background-color: var(--bg-white);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 50px;
        }

        .form-wrapper {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 40px;
        }

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

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

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--border-color);
            border-radius: 6px;
            background-color: var(--bg-white);
            font-family: inherit;
            transition: var(--transition);
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 122, 135, 0.15);
        }

        .form-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
        }

        /* 联系方式及右侧信息 */
        .contact-info {
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-detail-card {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            margin-bottom: 20px;
        }

        .contact-detail-card h3 {
            margin-bottom: 15px;
            color: var(--dark);
        }

        .qrcode-box {
            display: flex;
            align-items: center;
            gap: 20px;
            margin-top: 15px;
        }

        .qrcode-box img {
            width: 100px;
            height: 100px;
            border-radius: 6px;
            border: 1px solid var(--border-color);
        }

        .qrcode-text p {
            font-size: 0.9rem;
            margin-bottom: 5px;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: var(--dark);
            color: #b0bec5;
            padding: 60px 0 30px;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-col h4 {
            color: var(--bg-white);
            margin-bottom: 20px;
            font-size: 1rem;
            position: relative;
        }

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

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

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .friend-links {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

        .friend-links span {
            color: var(--bg-white);
            font-weight: 600;
        }

        .friend-links a {
            color: #b0bec5;
        }

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

        .footer-bottom {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 浮动客服 */
        .float-widget {
            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-color: var(--primary);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.2);
            cursor: pointer;
            transition: var(--transition);
            font-weight: bold;
            font-size: 0.9rem;
            position: relative;
        }

        .widget-btn:hover {
            background-color: var(--secondary);
            transform: scale(1.05);
        }

        .widget-qr {
            position: absolute;
            bottom: 60px;
            right: 0;
            background-color: var(--bg-white);
            padding: 15px;
            border-radius: 8px;
            box-shadow: var(--shadow);
            border: 1px solid var(--border-color);
            display: none;
            text-align: center;
            width: 150px;
        }

        .widget-qr img {
            width: 120px;
            height: 120px;
        }

        .widget-qr p {
            color: var(--dark);
            font-size: 0.8rem;
            margin-top: 5px;
        }

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

        /* 移动端菜单控制 */
        @media (max-width: 992px) {
            .nav-toggle {
                display: block;
            }

            .nav-links {
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                flex-direction: column;
                padding: 20px;
                border-bottom: 1px solid var(--border-color);
                display: none;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }

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

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .about-grid, .tech-standards, .tools-grid, .contact-grid, .news-grid {
                grid-template-columns: 1fr;
            }

            .step-timeline {
                grid-template-columns: repeat(2, 1fr);
            }

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

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

        @media (max-width: 576px) {
            .stats-grid, .step-timeline {
                grid-template-columns: 1fr;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .form-row {
                grid-template-columns: 1fr;
            }
        }