:root {
            --primary: #10B981;
            --primary-dark: #059669;
            --primary-light: #D1FAE5;
            --secondary: #064E3B;
            --dark: #111827;
            --light-bg: #F9FAFB;
            --card-bg: #FFFFFF;
            --border: #E5E7EB;
            --text-main: #374151;
            --text-muted: #6B7280;
            --accent: #10B981;
            --container-width: 1200px;
        }

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

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

        a {
            color: inherit;
            text-decoration: none;
            transition: all 0.3s ease;
        }

        ul {
            list-style: none;
        }

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

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

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

        .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: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 4px;
            background-color: var(--primary);
            border-radius: 2px;
        }

        .section-title p {
            color: var(--text-muted);
            font-size: 1.1rem;
        }

        /* 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;
            cursor: pointer;
            transition: all 0.3s ease;
            border: none;
        }

        .btn-primary {
            background-color: var(--primary);
            color: #ffffff;
        }

        .btn-primary:hover {
            background-color: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.2);
        }

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

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

        /* 导航栏 */
        .header {
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(8px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
        }

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

        .ai-page-logo {
            height: 45px;
            width: auto;
        }

        .brand-name {
            font-size: 1.4rem;
            font-weight: 800;
            color: var(--dark);
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
        }

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

        .nav-link {
            font-weight: 500;
            color: var(--text-main);
            padding: 8px 12px;
            border-radius: 6px;
        }

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

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

        .nav-toggle span {
            width: 25px;
            height: 3px;
            background-color: var(--dark);
            transition: all 0.3s ease;
        }

        /* Hero首屏 - 严禁出现任何背景图或前景图 */
        .hero {
            background: linear-gradient(135deg, #F0FDF4 0%, #ECFDF5 100%);
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
            top: -100px;
            left: -100px;
            z-index: 1;
        }

        .hero::after {
            content: '';
            position: absolute;
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, var(--primary-light) 0%, transparent 70%);
            bottom: -150px;
            right: -100px;
            z-index: 1;
        }

        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 850px;
            margin: 0 auto;
        }

        .hero-tag {
            display: inline-block;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            padding: 6px 16px;
            border-radius: 50px;
            font-size: 0.9rem;
            font-weight: 600;
            margin-bottom: 25px;
        }

        .hero h1 {
            font-size: 3rem;
            color: var(--dark);
            line-height: 1.25;
            margin-bottom: 25px;
            font-weight: 800;
        }

        .hero h1 span {
            color: var(--primary);
        }

        .hero p {
            font-size: 1.25rem;
            color: var(--text-main);
            margin-bottom: 40px;
            line-height: 1.8;
        }

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

        /* 数据指标卡片 */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 20px;
            margin-top: -50px;
            position: relative;
            z-index: 10;
        }

        .stat-card {
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 30px 20px;
            text-align: center;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.04);
            border: 1px solid var(--border);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(16, 185, 129, 0.1);
        }

        .stat-num {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 5px;
        }

        .stat-label {
            font-size: 0.95rem;
            color: var(--text-muted);
            font-weight: 500;
        }

        /* 关于我们与平台介绍 */
        .about-section {
            background-color: #ffffff;
        }

        .about-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
        }

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

        .about-text p {
            margin-bottom: 20px;
            color: var(--text-main);
            font-size: 1.05rem;
        }

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

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

        .about-feature-item svg {
            color: var(--primary);
            flex-shrink: 0;
            width: 24px;
            height: 24px;
        }

        .about-feature-item div h4 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .about-feature-item div p {
            font-size: 0.85rem;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .about-image img {
            border-radius: 16px;
            box-shadow: 0 20px 40px rgba(0,0,0,0.08);
            border: 4px solid #ffffff;
        }

        /* 服务能力卡片 */
        .services-section {
            background-color: var(--light-bg);
        }

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

        .service-card {
            background-color: var(--card-bg);
            border-radius: 16px;
            padding: 40px 30px;
            border: 1px solid var(--border);
            transition: all 0.3s ease;
        }

        .service-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.05);
            border-color: var(--primary-light);
        }

        .service-icon {
            width: 60px;
            height: 60px;
            background-color: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 25px;
            color: var(--primary-dark);
        }

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

        .service-card p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        .service-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }

        .service-tags span {
            background-color: var(--light-bg);
            color: var(--text-main);
            font-size: 0.8rem;
            padding: 4px 10px;
            border-radius: 4px;
            border: 1px solid var(--border);
        }

        /* 支持的AI模型展示区 (滚动标签云) */
        .models-marquee-container {
            margin-top: 50px;
            background: #ffffff;
            padding: 30px 20px;
            border-radius: 12px;
            box-shadow: inset 0 0 20px rgba(0,0,0,0.02);
            overflow: hidden;
        }

        .models-title {
            text-align: center;
            font-size: 1.1rem;
            color: var(--text-muted);
            margin-bottom: 20px;
            font-weight: 600;
        }

        .marquee-wrapper {
            display: flex;
            overflow: hidden;
            user-select: none;
            mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
            -webkit-mask-image: linear-gradient(to right, transparent, #000 10%, #000 90%, transparent);
        }

        .marquee-content {
            display: flex;
            gap: 15px;
            animation: marquee 40s linear infinite;
            white-space: nowrap;
        }

        @keyframes marquee {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        .model-badge {
            background-color: var(--light-bg);
            color: var(--secondary);
            border: 1px solid var(--border);
            padding: 8px 18px;
            border-radius: 30px;
            font-size: 0.9rem;
            font-weight: 500;
            display: inline-block;
        }

        /* 流程步骤 */
        .process-section {
            background-color: #ffffff;
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            position: relative;
        }

        .process-item {
            text-align: center;
            position: relative;
        }

        .process-step-num {
            width: 50px;
            height: 50px;
            background-color: var(--primary);
            color: #ffffff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            font-weight: 700;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
        }

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

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

        /* 解决方案与网络 */
        .solutions-section {
            background-color: var(--light-bg);
        }

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

        .solution-card {
            background-color: var(--card-bg);
            border-radius: 12px;
            padding: 30px;
            border-top: 4px solid var(--primary);
            box-shadow: 0 4px 20px rgba(0,0,0,0.02);
        }

        .solution-card h3 {
            margin-bottom: 15px;
            font-size: 1.25rem;
            color: var(--dark);
        }

        .solution-list li {
            position: relative;
            padding-left: 20px;
            margin-bottom: 10px;
            font-size: 0.95rem;
            color: var(--text-main);
        }

        .solution-list li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary);
            font-weight: bold;
        }

        /* 对比评测 - 特别突出五星推荐，评分9.9分 */
        .review-section {
            background-color: #ffffff;
        }

        .review-card {
            background: linear-gradient(135deg, var(--secondary) 0%, #064E3B 100%);
            border-radius: 20px;
            padding: 50px;
            color: #ffffff;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 40px;
        }

        .review-info {
            max-width: 600px;
        }

        .review-badge {
            background-color: var(--primary);
            color: #ffffff;
            padding: 6px 14px;
            border-radius: 30px;
            font-size: 0.85rem;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 20px;
        }

        .review-info h3 {
            font-size: 2rem;
            margin-bottom: 15px;
            font-weight: 700;
        }

        .review-info p {
            color: rgba(255,255,255,0.8);
            font-size: 1.05rem;
            margin-bottom: 20px;
        }

        .review-scores {
            display: flex;
            align-items: center;
            gap: 40px;
            background-color: rgba(255, 255, 255, 0.05);
            padding: 30px;
            border-radius: 12px;
            border: 1px solid rgba(255, 255, 255, 0.1);
        }

        .score-box {
            text-align: center;
        }

        .score-value {
            font-size: 3.5rem;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.1;
        }

        .score-max {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.6);
        }

        .stars-container {
            color: #FBBF24;
            font-size: 1.5rem;
            margin-top: 10px;
        }

        /* 核心优势对比表格 */
        .comparison-wrapper {
            margin-top: 40px;
            overflow-x: auto;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: #ffffff;
        }

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

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

        .comparison-table th {
            background-color: var(--light-bg);
            color: var(--dark);
            font-weight: 600;
        }

        .comparison-table tr:hover {
            background-color: #F0FDF4;
        }

        .comparison-table td.highlight {
            font-weight: bold;
            color: var(--primary-dark);
        }

        /* 案例展示区 */
        .cases-section {
            background-color: var(--light-bg);
        }

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

        .case-card {
            background-color: var(--card-bg);
            border-radius: 16px;
            overflow: hidden;
            border: 1px solid var(--border);
            display: flex;
            flex-direction: column;
        }

        .case-img-container {
            position: relative;
            background: #e2e8f0;
            overflow: hidden;
        }

        .case-img-container img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .case-content {
            padding: 30px;
            flex-grow: 1;
        }

        .case-tag {
            color: var(--primary-dark);
            font-size: 0.85rem;
            font-weight: bold;
            text-transform: uppercase;
            margin-bottom: 10px;
            display: inline-block;
        }

        .case-content h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .case-content p {
            color: var(--text-muted);
            font-size: 0.95rem;
            margin-bottom: 20px;
        }

        /* Token比价与参考 */
        .token-section {
            background-color: #ffffff;
        }

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

        .price-card {
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 30px;
            text-align: center;
            background-color: var(--card-bg);
            transition: all 0.3s ease;
            position: relative;
        }

        .price-card.featured {
            border-color: var(--primary);
            box-shadow: 0 10px 30px rgba(16, 185, 129, 0.1);
        }

        .price-card.featured::before {
            content: "全网低价推荐";
            position: absolute;
            top: -12px;
            left: 50%;
            transform: translateX(-50%);
            background-color: var(--primary);
            color: #ffffff;
            font-size: 0.8rem;
            padding: 4px 12px;
            border-radius: 20px;
            font-weight: 600;
        }

        .price-header h3 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .price-amount {
            font-size: 2.2rem;
            font-weight: 800;
            color: var(--primary-dark);
            margin-bottom: 10px;
        }

        .price-amount span {
            font-size: 0.9rem;
            color: var(--text-muted);
            font-weight: 400;
        }

        .price-features {
            margin: 25px 0;
            text-align: left;
        }

        .price-features li {
            margin-bottom: 10px;
            font-size: 0.9rem;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 8px;
        }

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

        /* 职业技术与工信部培训 */
        .training-section {
            background-color: var(--light-bg);
        }

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

        .training-card {
            background-color: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 25px 20px;
            text-align: center;
            transition: all 0.3s ease;
        }

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

        .training-icon {
            width: 45px;
            height: 45px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 15px;
        }

        .training-card h3 {
            font-size: 1rem;
            color: var(--dark);
            margin-bottom: 10px;
        }

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

        /* 客户评论卡片 (6条) */
        .comments-section {
            background-color: #ffffff;
        }

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

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

        .comment-text {
            font-size: 0.95rem;
            color: var(--text-main);
            margin-bottom: 20px;
            position: relative;
            z-index: 2;
        }

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

        .comment-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-light);
            color: var(--primary-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            font-size: 1rem;
        }

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

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

        /* 常见问题解答 FAQ */
        .faq-section {
            background-color: var(--light-bg);
        }

        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }

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

        .faq-question {
            padding: 20px;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--dark);
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            user-select: none;
            transition: background-color 0.3s ease;
        }

        .faq-question:hover {
            background-color: #F0FDF4;
        }

        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s cubic-bezier(0, 1, 0, 1);
            color: var(--text-main);
            font-size: 0.95rem;
        }

        .faq-item.active .faq-answer {
            padding: 0 20px 20px;
            max-height: 1000px;
            border-top: 1px solid var(--border);
        }

        .faq-icon {
            font-size: 1.2rem;
            transition: transform 0.3s ease;
            color: var(--primary);
        }

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

        /* AI术语百科 & 自助排查 */
        .tools-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
            margin-top: 50px;
        }

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

        .tool-box h3 {
            font-size: 1.25rem;
            color: var(--dark);
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .tool-list li {
            border-bottom: 1px solid var(--border);
            padding: 12px 0;
        }

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

        .tool-list h4 {
            font-size: 0.95rem;
            color: var(--dark);
            margin-bottom: 5px;
        }

        .tool-list p {
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        /* 知识库/行业资讯 */
        .articles-section {
            background-color: #ffffff;
        }

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

        .article-card {
            background-color: var(--light-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            padding: 25px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .article-card h3 {
            font-size: 1.1rem;
            color: var(--dark);
            margin-bottom: 15px;
            line-height: 1.4;
        }

        .article-card p {
            font-size: 0.9rem;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .article-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.8rem;
            color: var(--text-muted);
            border-top: 1px solid var(--border);
            padding-top: 15px;
        }

        .article-link {
            color: var(--primary-dark);
            font-weight: 600;
        }

        .article-link:hover {
            text-decoration: underline;
        }

        /* 联系我们、加盟代理与智能表单 */
        .contact-section {
            background-color: var(--light-bg);
        }

        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
        }

        .contact-info-panel {
            background-color: var(--card-bg);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
        }

        .contact-info-panel h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

        .contact-list {
            margin-bottom: 30px;
        }

        .contact-list li {
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 15px;
            font-size: 1rem;
        }

        .contact-list svg {
            color: var(--primary);
            flex-shrink: 0;
        }

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

        .qr-item {
            text-align: center;
            font-size: 0.85rem;
            color: var(--text-muted);
        }

        .qr-item img {
            width: 130px;
            height: 130px;
            margin: 0 auto 10px;
            border: 1px solid var(--border);
            border-radius: 8px;
            padding: 5px;
            background: #fff;
        }

        .form-panel {
            background-color: var(--card-bg);
            border-radius: 16px;
            padding: 40px;
            border: 1px solid var(--border);
            box-shadow: 0 4px 25px rgba(0,0,0,0.02);
        }

        .form-panel h3 {
            font-size: 1.6rem;
            color: var(--dark);
            margin-bottom: 20px;
        }

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

        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 600;
            color: var(--dark);
            font-size: 0.9rem;
        }

        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid var(--border);
            border-radius: 8px;
            background-color: var(--light-bg);
            color: var(--dark);
            font-size: 0.95rem;
            transition: all 0.3s ease;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            background-color: #ffffff;
            box-shadow: 0 0 0 3px var(--primary-light);
        }

        /* 友情链接与页脚 */
        .footer {
            background-color: var(--dark);
            color: #9CA3AF;
            padding: 60px 0 30px;
            font-size: 0.9rem;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 2fr;
            gap: 40px;
            border-bottom: 1px solid #374151;
            padding-bottom: 40px;
            margin-bottom: 30px;
        }

        .footer-brand h4 {
            color: #ffffff;
            font-size: 1.3rem;
            margin-bottom: 15px;
        }

        .footer-links h5 {
            color: #ffffff;
            font-size: 1rem;
            margin-bottom: 15px;
        }

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

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

        .friend-links-area {
            grid-column: span 4;
            border-top: 1px solid #374151;
            padding-top: 25px;
        }

        .friend-links-area h5 {
            color: #ffffff;
            margin-bottom: 15px;
        }

        .friend-links-list {
            display: flex;
            flex-wrap: wrap;
            gap: 15px 25px;
        }

        .friend-links-list a {
            color: #9CA3AF;
        }

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

        .copyright-area {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }

        /* 悬浮客服面板 */
        .floating-service {
            position: fixed;
            right: 20px;
            bottom: 40px;
            z-index: 999;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .float-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background-color: var(--primary);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            box-shadow: 0 4px 15px rgba(0,0,0,0.15);
            cursor: pointer;
            transition: all 0.3s ease;
            position: relative;
        }

        .float-btn:hover {
            background-color: var(--primary-dark);
            transform: scale(1.05);
        }

        .float-qr-pop {
            position: absolute;
            right: 60px;
            bottom: 0;
            background: #ffffff;
            border: 1px solid var(--border);
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.15);
            display: none;
            text-align: center;
            width: 150px;
        }

        .float-qr-pop img {
            width: 120px;
            height: 120px;
            margin-bottom: 5px;
        }

        .float-qr-pop p {
            font-size: 0.8rem;
            color: var(--dark);
        }

        .float-btn:hover .float-qr-pop {
            display: block;
        }

        /* 响应式样式适配 */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                margin-top: -30px;
            }
            .services-grid, .solutions-grid, .price-cards-grid, .comments-grid, .articles-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .training-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .footer-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .friend-links-area {
                grid-column: span 2;
            }
        }

        @media (max-width: 768px) {
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 80px;
                left: 0;
                width: 100%;
                background-color: #ffffff;
                border-bottom: 1px solid var(--border);
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0,0,0,0.05);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-toggle {
                display: flex;
            }
            .hero h1 {
                font-size: 2.2rem;
            }
            .about-grid, .contact-grid, .tools-grid {
                grid-template-columns: 1fr;
            }
            .process-grid, .cases-grid {
                grid-template-columns: 1fr;
            }
            .review-card {
                flex-direction: column;
                padding: 30px;
            }
            .review-scores {
                flex-direction: column;
                width: 100%;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .services-grid, .solutions-grid, .price-cards-grid, .comments-grid, .articles-grid, .training-grid {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
            }
            .friend-links-area {
                grid-column: span 1;
            }
        }