/* 变量及基础样式 */
        :root {
            --primary: #0052D9;
            --primary-hover: #0040A8;
            --accent: #00A8FF;
            --accent-light: #EBF5FF;
            --dark: #1E293B;
            --gray-text: #64748B;
            --light-bg: #F4F7FC;
            --white: #FFFFFF;
            --border-color: #E2E8F0;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
            --max-width: 1200px;
        }

        * {
            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(--dark);
            background-color: var(--white);
        }

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

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

        li {
            list-style: none;
        }

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

        .section-padding {
            padding: 80px 0;
        }

        /* 标题规范 */
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }

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

        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            margin: 8px auto 0;
            border-radius: 2px;
        }

        .section-title p {
            color: var(--gray-text);
            font-size: 1.1rem;
            max-width: 700px;
            margin: 0 auto;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: var(--transition);
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: var(--white) !important;
        }

        .btn-primary:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.3);
        }

        .btn-outline {
            background-color: transparent;
            border: 2px solid var(--primary);
            color: var(--primary) !important;
        }

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

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

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

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

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

        .brand-name {
            font-size: 1.4rem;
            font-weight: 700;
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            align-items: center;
        }

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

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

        .nav-btn {
            font-size: 0.9rem;
            padding: 8px 18px;
        }

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

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

        /* 首屏 Hero - 无图科技感风格 */
        .hero-section {
            padding-top: 150px;
            padding-bottom: 100px;
            background: radial-gradient(circle at 80% 20%, rgba(0, 168, 255, 0.15), transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(15, 83, 255, 0.08), transparent 50%),
                        var(--light-bg);
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: linear-gradient(rgba(0, 82, 217, 0.03) 1px, transparent 1px),
                              linear-gradient(90deg, rgba(0, 82, 217, 0.03) 1px, transparent 1px);
            background-size: 40px 40px;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 900px;
            margin: 0 auto;
        }

        .hero-badge {
            display: inline-block;
            padding: 6px 16px;
            background-color: var(--accent-light);
            color: var(--primary);
            font-size: 0.85rem;
            font-weight: 600;
            border-radius: 20px;
            margin-bottom: 20px;
            border: 1px solid rgba(0, 82, 217, 0.2);
        }

        .hero-title {
            font-size: 2.8rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 25px;
        }

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

        .hero-subtitle {
            font-size: 1.2rem;
            color: var(--gray-text);
            margin-bottom: 40px;
            max-width: 750px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-bottom: 50px;
        }

        /* 首页数据指标卡片 */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            max-width: 800px;
            margin: 0 auto;
        }

        .stat-card {
            background-color: rgba(255, 255, 255, 0.9);
            border: 1px solid var(--border-color);
            padding: 20px;
            border-radius: 12px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.02);
            transition: var(--transition);
        }

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

        .stat-num {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

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

        /* 关于我们 + 品牌展示 */
        .about-section {
            background-color: var(--white);
        }

        .grid-2col {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
        }

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

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

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

        .bullet-item {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.95rem;
            font-weight: 500;
        }

        .bullet-icon {
            color: var(--accent);
            font-weight: bold;
        }

        .img-wrapper {
            position: relative;
            border-radius: 16px;
            overflow: hidden;
            box-shadow: 0 10px 30px rgba(0,0,0,0.08);
        }

        .img-wrapper img {
            width: 100%;
            display: block;
            object-fit: cover;
            transition: var(--transition);
        }

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

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

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

        .service-card {
            background-color: var(--white);
            border-radius: 16px;
            padding: 35px 25px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.06);
        }

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

        .service-icon {
            font-size: 2.2rem;
            color: var(--primary);
            margin-bottom: 20px;
            display: inline-block;
        }

        .service-title {
            font-size: 1.3rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: var(--dark);
        }

        .service-desc {
            color: var(--gray-text);
            font-size: 0.95rem;
            margin-bottom: 15px;
        }

        .tag-list {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 15px;
        }

        .tag-item {
            font-size: 0.75rem;
            background-color: var(--light-bg);
            color: var(--primary);
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 500;
        }

        /* 解决方案与制作场景 */
        .solution-section {
            background-color: var(--white);
        }

        .tabs-container {
            margin-top: 40px;
        }

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

        .tab-btn {
            background-color: var(--light-bg);
            border: 1px solid var(--border-color);
            padding: 10px 24px;
            font-size: 0.95rem;
            font-weight: 600;
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
        }

        .tab-btn.active, .tab-btn:hover {
            background-color: var(--primary);
            color: var(--white);
            border-color: var(--primary);
        }

        .tab-content {
            display: none;
        }

        .tab-content.active {
            display: block;
            animation: fadeIn 0.5s ease;
        }

        /* 标准化流程 & 技术标准 */
        .process-section {
            background-color: var(--light-bg);
        }

        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            padding: 40px 0;
        }

        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            top: 0;
            width: 4px;
            height: 100%;
            background-color: var(--border-color);
            transform: translateX(-50%);
        }

        .timeline-item {
            display: flex;
            justify-content: flex-end;
            padding-right: 50%;
            position: relative;
            margin-bottom: 50px;
        }

        .timeline-item:nth-child(even) {
            justify-content: flex-start;
            padding-right: 0;
            padding-left: 50%;
        }

        .timeline-dot {
            position: absolute;
            left: 50%;
            top: 15px;
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: var(--primary);
            border: 4px solid var(--white);
            transform: translateX(-50%);
            box-shadow: 0 0 10px rgba(0, 82, 217, 0.3);
            z-index: 2;
        }

        .timeline-content {
            background-color: var(--white);
            padding: 25px;
            border-radius: 12px;
            box-shadow: 0 4px 15px rgba(0, 0, 0, 0.03);
            width: 90%;
            margin-right: 30px;
            border: 1px solid var(--border-color);
        }

        .timeline-item:nth-child(even) .timeline-content {
            margin-right: 0;
            margin-left: 30px;
        }

        .timeline-step {
            font-size: 0.8rem;
            color: var(--accent);
            font-weight: 700;
            text-transform: uppercase;
            margin-bottom: 5px;
        }

        /* 案例中心 */
        .case-section {
            background-color: var(--white);
        }

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

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

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

        .case-img-box {
            height: 200px;
            overflow: hidden;
        }

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

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            font-size: 0.8rem;
            color: var(--primary);
            font-weight: 600;
            margin-bottom: 8px;
            display: inline-block;
        }

        .case-title {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 10px;
        }

        /* 对比评测 & Token 比价 */
        .eval-section {
            background-color: var(--light-bg);
        }

        .table-responsive {
            width: 100%;
            overflow-x: auto;
            background-color: var(--white);
            border-radius: 16px;
            box-shadow: 0 6px 25px rgba(0,0,0,0.04);
            border: 1px solid var(--border-color);
        }

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

        .eval-table th, .eval-table td {
            padding: 18px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 0.95rem;
        }

        .eval-table th {
            background-color: #F8FAFC;
            font-weight: 700;
            color: var(--dark);
        }

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

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

        .highlight-row {
            background-color: var(--accent-light);
        }

        .score-badge {
            background-color: #E2F9EB;
            color: #10B981;
            padding: 4px 10px;
            border-radius: 4px;
            font-weight: 700;
            font-size: 0.85rem;
        }

        .rating-star {
            color: #FBBF24;
            font-size: 1.1rem;
        }

        /* 培训板块 */
        .training-section {
            background-color: var(--white);
        }

        .training-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }

        .training-card {
            background-color: var(--light-bg);
            padding: 25px 20px;
            border-radius: 12px;
            text-align: center;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

        .training-card:hover {
            background-color: var(--white);
            border-color: var(--primary);
            box-shadow: 0 8px 20px rgba(0, 82, 217, 0.08);
            transform: translateY(-5px);
        }

        .training-icon {
            font-size: 2rem;
            color: var(--primary);
            margin-bottom: 15px;
        }

        .training-name {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--dark);
        }

        .training-cert {
            font-size: 0.8rem;
            color: var(--gray-text);
        }

        /* 用户评论 */
        .comments-section {
            background-color: var(--light-bg);
        }

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

        .comment-card {
            background-color: var(--white);
            padding: 30px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 15px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .comment-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0,0,0,0.05);
        }

        .comment-header {
            display: flex;
            align-items: center;
            gap: 15px;
            margin-bottom: 15px;
        }

        .comment-avatar {
            width: 48px;
            height: 48px;
            border-radius: 50%;
            background-color: var(--accent-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 1.1rem;
        }

        .comment-user-info h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 2px;
        }

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

        .comment-body {
            color: var(--dark);
            font-size: 0.95rem;
            line-height: 1.6;
        }

        /* 表单与需求匹配 */
        .form-section {
            background-color: var(--white);
        }

        .form-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            background-color: var(--light-bg);
            border-radius: 24px;
            overflow: hidden;
            box-shadow: 0 8px 30px rgba(0,0,0,0.03);
            border: 1px solid var(--border-color);
        }

        .form-info-pane {
            background: linear-gradient(135deg, var(--primary), var(--accent));
            color: var(--white);
            padding: 50px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .form-info-pane h3 {
            font-size: 2rem;
            margin-bottom: 20px;
        }

        .form-info-pane p {
            color: rgba(255,255,255,0.9);
            font-size: 1.05rem;
            line-height: 1.7;
        }

        .contact-channel {
            margin-top: 40px;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .channel-item {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .channel-icon {
            font-size: 1.2rem;
        }

        .form-pane {
            padding: 50px;
        }

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

        .form-label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            font-size: 0.95rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 16px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 1rem;
            outline: none;
            transition: var(--transition);
        }

        .form-control:focus {
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
        }

        /* 帮助中心 & FAQ */
        .faq-section {
            background-color: var(--light-bg);
        }

        .faq-accordion {
            max-width: 850px;
            margin: 0 auto;
        }

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

        .faq-header {
            padding: 20px 25px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 1.05rem;
            transition: var(--transition);
        }

        .faq-header:hover {
            color: var(--primary);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: var(--transition);
        }

        .faq-body {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            padding: 0 25px;
            color: var(--gray-text);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-body {
            padding-bottom: 20px;
        }

        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            color: var(--primary);
        }

        /* 自助排查与术语百科 */
        .troubleshoot-box {
            background-color: var(--white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 25px;
            margin-top: 40px;
        }

        .troubleshoot-title {
            font-size: 1.2rem;
            font-weight: 700;
            margin-bottom: 15px;
            color: var(--dark);
        }

        .troubleshoot-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }

        .troubleshoot-card {
            background-color: var(--light-bg);
            padding: 20px;
            border-radius: 8px;
        }

        .troubleshoot-card h4 {
            font-size: 1rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--primary);
        }

        .troubleshoot-card p {
            font-size: 0.85rem;
            color: var(--gray-text);
        }

        /* 行业资讯 / 知识库 / 标签云 */
        .news-section {
            background-color: var(--white);
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }

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

        .news-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 20px rgba(0,0,0,0.05);
        }

        .news-info {
            padding: 20px;
        }

        .news-date {
            font-size: 0.8rem;
            color: var(--gray-text);
            margin-bottom: 8px;
        }

        .news-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            line-height: 1.4;
        }

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

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

        .tags-cloud-wrap {
            border-top: 1px solid var(--border-color);
            padding-top: 30px;
            margin-top: 30px;
        }

        .tags-cloud-title {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 15px;
            text-align: center;
        }

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

        .tag-cloud-item {
            background-color: var(--light-bg);
            color: var(--dark);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            transition: var(--transition);
        }

        .tag-cloud-item:hover {
            background-color: var(--primary);
            color: var(--white);
        }

        /* 友情链接 */
        .friendly-links {
            background-color: var(--light-bg);
            padding: 30px 0;
            border-top: 1px solid var(--border-color);
            border-bottom: 1px solid var(--border-color);
        }

        .links-container {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 25px;
            flex-wrap: wrap;
        }

        .links-title {
            font-size: 0.9rem;
            font-weight: 700;
            color: var(--gray-text);
        }

        .friendly-links a {
            font-size: 0.9rem;
            color: var(--gray-text);
        }

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

        /* 加盟代理区 */
        .agent-section {
            background: linear-gradient(135deg, rgba(0, 82, 217, 0.05), rgba(0, 168, 255, 0.05));
            border-top: 1px solid var(--border-color);
        }

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

        .agent-list {
            margin-top: 20px;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .agent-item {
            display: flex;
            align-items: flex-start;
            gap: 10px;
        }

        .agent-icon {
            color: #10B981;
            font-weight: bold;
            font-size: 1.2rem;
            line-height: 1;
        }

        .agent-item h4 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 3px;
        }

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

        /* 页脚 */
        footer {
            background-color: var(--dark);
            color: var(--white);
            padding: 60px 0 20px;
            font-size: 0.9rem;
        }

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

        .footer-logo-box {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .footer-logo-box p {
            color: rgba(255,255,255,0.7);
        }

        .footer-col h4 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-col h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 3px;
            background-color: var(--accent);
            margin-top: 8px;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .footer-links a {
            color: rgba(255,255,255,0.7);
        }

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

        .footer-qrcode {
            display: flex;
            gap: 20px;
            align-items: center;
        }

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

        .qrcode-item img {
            width: 80px;
            height: 80px;
            border-radius: 4px;
            background-color: var(--white);
            padding: 3px;
            margin-bottom: 5px;
        }

        .qrcode-item span {
            font-size: 0.75rem;
            color: rgba(255,255,255,0.6);
            display: block;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            color: rgba(255,255,255,0.5);
            font-size: 0.8rem;
        }

        .ai-page-home-link {
            color: var(--accent);
            text-decoration: underline;
        }

        .ai-page-home-link:hover {
            color: var(--white);
        }

        /* 侧边悬浮客服区 */
        .sticky-contact {
            position: fixed;
            right: 20px;
            bottom: 40px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 999;
        }

        .sticky-item {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0, 82, 217, 0.3);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .sticky-item:hover {
            background-color: var(--accent);
            transform: scale(1.05);
        }

        .sticky-qrcode-pop {
            position: absolute;
            right: 65px;
            bottom: 0;
            background-color: var(--white);
            border: 1px solid var(--border-color);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 150px;
        }

        .sticky-qrcode-pop img {
            width: 120px;
            height: 120px;
            margin-bottom: 8px;
        }

        .sticky-qrcode-pop span {
            color: var(--dark);
            font-size: 0.8rem;
            font-weight: 600;
        }

        .sticky-item:hover .sticky-qrcode-pop {
            display: block;
        }

        /* 动画帧定义 */
        @keyframes fadeIn {
            from { opacity: 0; transform: translateY(10px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* 响应式媒体查询 */
        @media (max-width: 1024px) {
            .hero-title { font-size: 2.2rem; }
            .grid-2col { grid-template-columns: 1fr; gap: 40px; }
            .services-grid, .case-grid, .comments-grid { grid-template-columns: 1fr 1fr; }
            .training-grid { grid-template-columns: repeat(3, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }

        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: var(--white);
                flex-direction: column;
                padding: 40px 20px;
                gap: 25px;
                transition: var(--transition);
                box-shadow: 0 10px 20px rgba(0,0,0,0.05);
            }

            .nav-menu.active {
                left: 0;
            }

            .menu-toggle {
                display: flex;
            }

            .hero-title { font-size: 1.8rem; }
            .hero-stats { grid-template-columns: 1fr 1fr; }
            .services-grid, .case-grid, .comments-grid { grid-template-columns: 1fr; }
            .training-grid { grid-template-columns: 1fr 1fr; }
            .form-layout { grid-template-columns: 1fr; }
            .form-info-pane { padding: 30px; }
            .form-pane { padding: 30px; }
            .timeline::before { left: 20px; }
            .timeline-item { justify-content: flex-start; padding-left: 40px; padding-right: 0; }
            .timeline-item:nth-child(even) { padding-left: 40px; }
            .timeline-dot { left: 20px; }
            .timeline-content { width: 100%; margin-left: 0 !important; }
            .footer-grid { grid-template-columns: 1fr; }
            .troubleshoot-grid { grid-template-columns: 1fr; }
        }