/* 变量及重置 */
        :root {
            --primary-color: #0052D9;
            --primary-hover: #0045B5;
            --accent-color: #00D2FF;
            --text-dark: #1E293B;
            --text-light: #64748B;
            --bg-light: #F4F7FC;
            --bg-white: #FFFFFF;
            --border-color: #E2E8F0;
            --shadow-sm: 0 2px 8px rgba(0, 82, 217, 0.05);
            --shadow-md: 0 10px 25px rgba(0, 82, 217, 0.08);
            --shadow-lg: 0 20px 40px rgba(0, 82, 217, 0.12);
            --transition: all 0.3s ease;
        }

        * {
            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-dark);
            background-color: var(--bg-light);
            line-height: 1.6;
        }

        body {
            overflow-x: hidden;
        }

        /* 统一外层居中容器 */
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }

        section {
            padding: 80px 0;
            position: relative;
        }

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

        .section-header h2 {
            font-size: 2.2rem;
            color: var(--primary-color);
            font-weight: 700;
            margin-bottom: 12px;
            position: relative;
            display: inline-block;
        }

        .section-header h2::after {
            content: '';
            display: block;
            width: 50px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
            margin: 8px auto 0;
            border-radius: 2px;
        }

        .section-header p {
            font-size: 1.1rem;
            color: var(--text-light);
            max-width: 600px;
            margin: 0 auto;
        }

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

        .btn-primary {
            background-color: var(--primary-color);
            color: var(--bg-white);
            box-shadow: 0 4px 12px rgba(0, 82, 217, 0.2);
        }

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

        .btn-accent {
            background-color: var(--accent-color);
            color: var(--text-dark);
            box-shadow: 0 4px 12px rgba(0, 210, 255, 0.2);
        }

        .btn-accent:hover {
            background-color: #00bce6;
            transform: translateY(-2px);
        }

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

        .btn-outline:hover {
            background-color: var(--primary-color);
            color: var(--bg-white);
            transform: translateY(-2px);
        }

        /* 导航栏 */
        header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            box-shadow: var(--shadow-sm);
            border-bottom: 1px solid var(--border-color);
        }

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

        .logo-container {
            display: flex;
            align-items: center;
        }

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

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

        .nav-link {
            text-decoration: none;
            color: var(--text-dark);
            font-size: 0.95rem;
            font-weight: 500;
            transition: var(--transition);
        }

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

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

        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            gap: 6px;
        }

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

        /* 首屏 Hero */
        .hero {
            background: radial-gradient(circle at 80% 20%, rgba(0, 210, 255, 0.1) 0%, transparent 40%),
                        radial-gradient(circle at 10% 80%, rgba(0, 82, 217, 0.08) 0%, transparent 50%),
                        var(--bg-white);
            padding: 100px 0 80px;
            text-align: center;
        }

        .hero-content {
            max-width: 900px;
            margin: 0 auto;
        }

        .hero h1 {
            font-size: 2.6rem;
            line-height: 1.25;
            color: var(--primary-color);
            margin-bottom: 24px;
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-light);
            margin-bottom: 35px;
            line-height: 1.8;
        }

        .hero-btns {
            display: flex;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 40px;
        }

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

        .metric-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .metric-num {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 8px;
        }

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

        /* 关于我们 */
        .about-section {
            background-color: var(--bg-white);
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1.2fr;
            gap: 50px;
            align-items: center;
        }

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

        .about-info p {
            margin-bottom: 16px;
            color: var(--text-dark);
        }

        .about-features {
            list-style: none;
            margin-top: 24px;
        }

        .about-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
        }

        .about-features li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent-color);
            font-weight: 700;
            font-size: 1.1rem;
        }

        .about-img-box {
            border-radius: 16px;
            overflow: hidden;
            box-shadow: var(--shadow-lg);
        }

        .about-img-box img {
            width: 100%;
            height: auto;
            display: block;
        }

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

        .service-card {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 35px 24px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

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

        .service-card:hover::before {
            opacity: 1;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: var(--shadow-lg);
        }

        .service-icon {
            font-size: 2.5rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }

        .service-card h3 {
            font-size: 1.4rem;
            margin-bottom: 14px;
            color: var(--text-dark);
        }

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

        /* 模型聚合墙 */
        .model-cloud {
            margin-top: 40px;
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .model-cloud-title {
            text-align: center;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--primary-color);
        }

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

        .model-tag {
            background-color: var(--bg-light);
            color: var(--primary-color);
            padding: 6px 14px;
            border-radius: 20px;
            font-size: 0.85rem;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }

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

        /* 一站式AIGC制作场景 */
        .scene-section {
            background-color: var(--bg-white);
        }

        .scene-tabs-container {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }

        .scene-tabs {
            display: flex;
            justify-content: center;
            gap: 12px;
            flex-wrap: wrap;
        }

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

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

        .scene-content {
            display: none;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
            align-items: center;
            background-color: var(--bg-light);
            padding: 40px;
            border-radius: 16px;
            border: 1px solid var(--border-color);
        }

        .scene-content.active {
            display: grid;
            animation: fadeIn 0.5s ease;
        }

        .scene-detail h3 {
            font-size: 1.8rem;
            color: var(--primary-color);
            margin-bottom: 16px;
        }

        .scene-detail p {
            color: var(--text-dark);
            margin-bottom: 20px;
        }

        .scene-media img {
            width: 100%;
            border-radius: 12px;
            box-shadow: var(--shadow-md);
        }

        /* 流程步骤 */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            background-color: var(--bg-white);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            position: relative;
        }

        .step-num {
            width: 50px;
            height: 50px;
            background-color: var(--primary-color);
            color: var(--bg-white);
            font-size: 1.5rem;
            font-weight: 700;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            border: 4px solid var(--bg-light);
            box-shadow: 0 0 0 4px var(--primary-color);
        }

        .step-card h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--text-dark);
        }

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

        /* 技术标准 */
        .tech-section {
            background-color: var(--bg-white);
        }

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

        .tech-item {
            display: flex;
            gap: 20px;
            background-color: var(--bg-light);
            padding: 24px;
            border-radius: 12px;
            border: 1px solid var(--border-color);
        }

        .tech-icon {
            font-size: 2rem;
            color: var(--primary-color);
        }

        .tech-info h4 {
            font-size: 1.15rem;
            margin-bottom: 8px;
        }

        .tech-info p {
            font-size: 0.95rem;
            color: var(--text-light);
        }

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

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

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

        .case-img-box {
            overflow: hidden;
        }

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

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

        .case-body {
            padding: 20px;
        }

        .case-tag {
            background-color: var(--bg-light);
            color: var(--primary-color);
            font-size: 0.75rem;
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-body h3 {
            font-size: 1.25rem;
            margin-bottom: 8px;
            color: var(--text-dark);
        }

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

        /* 对比评测 */
        .comparison-section {
            background-color: var(--bg-white);
        }

        .comp-header {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: var(--bg-white);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
            margin-bottom: 40px;
            box-shadow: var(--shadow-md);
        }

        .comp-score-box {
            display: flex;
            justify-content: center;
            align-items: baseline;
            gap: 10px;
            margin-bottom: 12px;
        }

        .comp-score {
            font-size: 4rem;
            font-weight: 800;
            line-height: 1;
        }

        .comp-total {
            font-size: 1.5rem;
            opacity: 0.8;
        }

        .comp-stars {
            font-size: 1.8rem;
            color: #FFD214;
            margin-bottom: 16px;
        }

        .comp-table-container {
            overflow-x: auto;
        }

        .comp-table {
            width: 100%;
            border-collapse: collapse;
            background-color: var(--bg-white);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            min-width: 800px;
        }

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

        .comp-table th {
            background-color: var(--bg-light);
            font-weight: 700;
            color: var(--text-dark);
        }

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

        .comp-highlight {
            background-color: rgba(0, 82, 217, 0.03);
            font-weight: 600;
            color: var(--primary-color);
        }

        /* Token 比价 */
        .token-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

        .token-box {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
        }

        .token-box h3 {
            margin-bottom: 20px;
            color: var(--primary-color);
            border-left: 4px solid var(--accent-color);
            padding-left: 12px;
        }

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

        .token-item {
            display: flex;
            justify-content: space-between;
            padding: 12px 0;
            border-bottom: 1px dashed var(--border-color);
        }

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

        .token-name {
            font-weight: 500;
        }

        .token-price {
            color: #E53E3E;
            font-weight: 700;
        }

        /* 培训中心 */
        .training-section {
            background-color: var(--bg-white);
        }

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

        .course-card {
            background-color: var(--bg-light);
            border-radius: 12px;
            padding: 30px 24px;
            border: 1px solid var(--border-color);
            transition: var(--transition);
        }

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

        .course-badge {
            background-color: var(--primary-color);
            color: var(--bg-white);
            font-size: 0.75rem;
            padding: 4px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 14px;
        }

        .course-card h3 {
            font-size: 1.3rem;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .course-card p {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-bottom: 16px;
        }

        .course-meta {
            font-size: 0.85rem;
            color: var(--primary-color);
            font-weight: 600;
        }

        /* 需求匹配表单 & 联系我们 */
        .form-contact-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 40px;
        }

        .form-box {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

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

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

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

        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
            background-color: var(--bg-white);
            box-shadow: 0 0 0 3px rgba(0, 82, 217, 0.1);
        }

        .contact-box {
            background-color: var(--bg-white);
            border-radius: 16px;
            padding: 40px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .contact-info-list {
            list-style: none;
            margin-bottom: 30px;
        }

        .contact-info-item {
            margin-bottom: 20px;
            display: flex;
            align-items: flex-start;
            gap: 12px;
        }

        .contact-info-item strong {
            color: var(--primary-color);
            min-width: 80px;
            display: inline-block;
        }

        .qr-area {
            display: flex;
            align-items: center;
            gap: 20px;
            background-color: var(--bg-light);
            padding: 20px;
            border-radius: 12px;
        }

        .qr-area img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            border: 1px solid var(--border-color);
        }

        .qr-text h4 {
            font-size: 1.1rem;
            margin-bottom: 6px;
            color: var(--primary-color);
        }

        .qr-text p {
            font-size: 0.85rem;
            color: var(--text-light);
        }

        /* 常见用户问题 FAQ */
        .faq-section {
            background-color: var(--bg-white);
        }

        .faq-grid {
            display: flex;
            flex-direction: column;
            gap: 16px;
            max-width: 900px;
            margin: 0 auto;
        }

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

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

        .faq-question::after {
            content: '+';
            font-size: 1.5rem;
            font-weight: 400;
            color: var(--primary-color);
            transition: var(--transition);
        }

        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
        }

        .faq-answer-inner {
            padding: 18px 24px;
            border-top: 1px solid var(--border-color);
            color: var(--text-light);
            font-size: 0.95rem;
        }

        /* 自助排查与术语百科 */
        .tools-grid {
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 30px;
            margin-top: 40px;
        }

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

        .troubleshoot-box h3, .wiki-box h3 {
            margin-bottom: 20px;
            color: var(--primary-color);
        }

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

        .troubleshoot-step {
            display: flex;
            gap: 15px;
            margin-bottom: 16px;
        }

        .troubleshoot-step-num {
            width: 28px;
            height: 28px;
            background-color: var(--accent-color);
            color: var(--text-dark);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            flex-shrink: 0;
        }

        .wiki-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .wiki-item dt {
            font-weight: 600;
            color: var(--primary-color);
        }

        .wiki-item dd {
            font-size: 0.9rem;
            color: var(--text-light);
            margin-left: 0;
            margin-top: 4px;
        }

        /* 客户评论卡片 */
        .comments-section {
            background-color: var(--bg-white);
        }

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

        .comment-card {
            background-color: var(--bg-light);
            border-radius: 12px;
            padding: 30px;
            border: 1px solid var(--border-color);
            position: relative;
        }

        .comment-content {
            font-style: italic;
            color: var(--text-dark);
            margin-bottom: 20px;
            position: relative;
        }

        .comment-content::before {
            content: '“';
            font-size: 4rem;
            color: rgba(0, 82, 217, 0.1);
            position: absolute;
            top: -20px;
            left: -15px;
        }

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

        .author-info h4 {
            font-size: 1rem;
            color: var(--primary-color);
        }

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

        /* 行业资讯 / 知识库 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }

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

        .article-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }

        .article-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--text-dark);
            text-decoration: none;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: var(--transition);
        }

        .article-title:hover {
            color: var(--primary-color);
        }

        .article-meta {
            font-size: 0.85rem;
            color: var(--text-light);
            display: flex;
            justify-content: space-between;
        }

        /* 底部区域 */
        footer {
            background-color: #0A1128;
            color: rgba(255, 255, 255, 0.7);
            padding: 60px 0 20px;
            font-size: 0.9rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 45px;
        }

        .footer-logo img {
            height: 45px;
            margin-bottom: 15px;
        }

        .footer-about p {
            margin-bottom: 15px;
            line-height: 1.6;
        }

        .footer-links-col h4 {
            color: var(--bg-white);
            font-size: 1.1rem;
            margin-bottom: 20px;
            position: relative;
        }

        .footer-links-col h4::after {
            content: '';
            display: block;
            width: 30px;
            height: 2px;
            background-color: var(--accent-color);
            margin-top: 6px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            text-decoration: none;
            transition: var(--transition);
        }

        .footer-links a:hover {
            color: var(--accent-color);
            padding-left: 4px;
        }

        .footer-qrcode {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
        }

        .footer-qrcode img {
            width: 100px;
            height: 100px;
            border-radius: 8px;
            margin-bottom: 8px;
        }

        .friend-links {
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
            align-items: center;
        }

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

        .friend-links a {
            color: rgba(255, 255, 255, 0.5);
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }

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

        .copyright-area {
            text-align: center;
            margin-top: 30px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.05);
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
        }

        .ai-page-home-link {
            color: var(--accent-color);
            text-decoration: none;
        }

        /* 侧边悬停客服 */
        .fixed-contact {
            position: fixed;
            right: 20px;
            bottom: 30px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .fixed-item {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: var(--bg-white);
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: var(--shadow-md);
            cursor: pointer;
            position: relative;
            transition: var(--transition);
        }

        .fixed-item:hover {
            transform: scale(1.1);
            background-color: var(--primary-hover);
        }

        .fixed-item .hover-box {
            position: absolute;
            right: 60px;
            bottom: 0;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 16px;
            border-radius: 12px;
            box-shadow: var(--shadow-lg);
            display: none;
            width: 220px;
            text-align: center;
            color: var(--text-dark);
        }

        .fixed-item .hover-box img {
            width: 150px;
            height: 150px;
            margin-bottom: 8px;
        }

        .fixed-item:hover .hover-box {
            display: block;
        }

        /* 动效 */
        @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) {
            .metrics-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .service-grid, .course-grid, .case-grid, .comments-grid, .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-grid, .scene-content, .form-contact-grid, .tools-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 768px) {
            section {
                padding: 60px 0;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                width: 100%;
                background-color: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
                box-shadow: var(--shadow-md);
            }
            .nav-menu.active {
                display: flex;
            }
            .menu-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2rem;
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .token-grid, .tech-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 480px) {
            .metrics-grid, .service-grid, .course-grid, .case-grid, .comments-grid, .articles-grid, .steps-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .hero-btns {
                flex-direction: column;
                width: 100%;
            }
            .btn {
                width: 100%;
            }
        }