:root {
            --primary-color: #0052d9;
            --primary-hover: #003eb3;
            --secondary-color: #00c2ff;
            --text-dark: #1e293b;
            --text-muted: #64748b;
            --bg-light: #f4f7fc;
            --bg-white: #ffffff;
            --border-color: #e2e8f0;
            --accent-color: #e0f2fe;
            --accent-text: #0369a1;
            --max-width: 1200px;
            --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

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

        /* 统一容器 */
        .container {
            width: 100%;
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }

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

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

        .logo-area {
            display: flex;
            align-items: center;
            gap: 12px;
        }

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

        .brand-name {
            font-size: 20px;
            font-weight: 700;
            color: var(--primary-color);
            letter-spacing: 0.5px;
        }

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

        .nav-menu a {
            color: var(--text-dark);
            text-decoration: none;
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            padding: 8px 12px;
            border-radius: 6px;
        }

        .nav-menu a:hover {
            color: var(--primary-color);
            background-color: var(--accent-color);
        }

        .nav-btn {
            background-color: var(--primary-color);
            color: #ffffff !important;
            padding: 8px 18px !important;
            border-radius: 20px !important;
            font-weight: 600 !important;
            transition: var(--transition);
            box-shadow: 0 4px 10px rgba(0, 82, 217, 0.2);
        }

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

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-dark);
        }

        /* 首屏 Hero 区域 (绝对无图) */
        .hero-section {
            padding: 160px 0 100px 0;
            background: radial-gradient(circle at 80% 20%, rgba(0, 194, 255, 0.08) 0%, transparent 50%),
                        radial-gradient(circle at 20% 80%, rgba(0, 82, 217, 0.05) 0%, transparent 50%),
                        var(--bg-white);
            border-bottom: 1px solid var(--border-color);
            position: relative;
        }

        .hero-content {
            text-align: center;
            max-width: 800px;
            margin: 0 auto;
        }

        .badge-premium {
            display: inline-flex;
            align-items: center;
            background-color: var(--accent-color);
            color: var(--accent-text);
            padding: 6px 16px;
            border-radius: 30px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 24px;
            letter-spacing: 0.5px;
        }

        h1 {
            font-size: 42px;
            font-weight: 800;
            line-height: 1.25;
            color: var(--text-dark);
            margin-bottom: 24px;
            letter-spacing: -0.5px;
        }

        .hero-sub {
            font-size: 18px;
            color: var(--text-muted);
            margin-bottom: 40px;
            max-width: 650px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .btn-main {
            background-color: var(--primary-color);
            color: #ffffff;
            text-decoration: none;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            box-shadow: 0 8px 24px rgba(0, 82, 217, 0.25);
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-main:hover {
            background-color: var(--primary-hover);
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 82, 217, 0.35);
        }

        .btn-outline {
            border: 2px solid var(--border-color);
            color: var(--text-dark);
            text-decoration: none;
            padding: 12px 30px;
            border-radius: 30px;
            font-weight: 600;
            font-size: 16px;
            transition: var(--transition);
            background-color: transparent;
        }

        .btn-outline:hover {
            background-color: var(--bg-light);
            border-color: var(--text-muted);
        }

        /* 核心数据卡片 */
        .metrics-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 60px;
        }

        .metric-card {
            background: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            text-align: center;
            box-shadow: 0 4px 6px rgba(0,0,0,0.02);
            transition: var(--transition);
        }

        .metric-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px rgba(0, 82, 217, 0.08);
            border-color: var(--primary-color);
        }

        .metric-value {
            font-size: 32px;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 8px;
        }

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

        /* 公用分区样式 */
        section {
            padding: 80px 0;
            border-bottom: 1px solid var(--border-color);
        }

        .section-header {
            text-align: center;
            max-width: 700px;
            margin: 0 auto 50px auto;
        }

        .section-subtitle {
            color: var(--primary-color);
            font-size: 14px;
            font-weight: 700;
            text-transform: uppercase;
            letter-spacing: 2px;
            margin-bottom: 12px;
            display: block;
        }

        .section-title {
            font-size: 30px;
            font-weight: 700;
            color: var(--text-dark);
            margin-bottom: 16px;
        }

        .section-desc {
            font-size: 15px;
            color: var(--text-muted);
        }

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

        .about-text h3 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-weight: 700;
        }

        .about-text p {
            color: var(--text-muted);
            margin-bottom: 16px;
            font-size: 15px;
        }

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

        .about-features li {
            position: relative;
            padding-left: 28px;
            margin-bottom: 12px;
            font-weight: 500;
            font-size: 15px;
        }

        .about-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary-color);
            font-weight: 800;
        }

        /* 平台软件介绍 */
        .software-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .software-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            transition: var(--transition);
        }

        .software-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.05);
            border-color: var(--primary-color);
        }

        .software-icon {
            width: 48px;
            height: 48px;
            background-color: var(--accent-color);
            color: var(--primary-color);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            margin-bottom: 20px;
            font-weight: bold;
        }

        .software-card h3 {
            font-size: 18px;
            margin-bottom: 12px;
            color: var(--text-dark);
        }

        .software-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

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

        .step-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            position: relative;
        }

        .step-num {
            position: absolute;
            top: 20px;
            right: 20px;
            font-size: 32px;
            font-weight: 900;
            color: rgba(0, 82, 217, 0.1);
        }

        .step-card h3 {
            font-size: 18px;
            margin-bottom: 10px;
            margin-top: 10px;
        }

        .step-card p {
            font-size: 14px;
            color: var(--text-muted);
        }

        /* 支持平台标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 12px;
            max-width: 900px;
            margin: 0 auto;
        }

        .tag-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 500;
            color: var(--text-dark);
            transition: var(--transition);
        }

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

        /* 对比评测表格 */
        .table-wrapper {
            width: 100%;
            overflow-x: auto;
            background: var(--bg-white);
            border-radius: 16px;
            border: 1px solid var(--border-color);
            box-shadow: 0 4px 12px rgba(0,0,0,0.02);
        }

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

        th, td {
            padding: 16px 24px;
            border-bottom: 1px solid var(--border-color);
            font-size: 14px;
        }

        th {
            background-color: #fafbfc;
            font-weight: 700;
            color: var(--text-dark);
        }

        .highlight-col {
            background-color: rgba(0, 82, 217, 0.02);
            font-weight: 600;
        }

        /* 推荐度及评分样式 */
        .rating-badge {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: #ffffff;
            padding: 20px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: space-around;
            max-width: 600px;
            margin: 40px auto 0 auto;
            text-align: center;
            box-shadow: 0 8px 20px rgba(0, 82, 217, 0.15);
        }

        .rating-item h4 {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 5px;
        }

        .rating-item p {
            font-size: 28px;
            font-weight: 800;
        }

        /* 价格表格与Token比价 */
        .price-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .price-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            text-align: center;
            position: relative;
        }

        .price-card.popular {
            border-color: var(--primary-color);
            box-shadow: 0 8px 24px rgba(0, 82, 217, 0.08);
        }

        .price-card.popular::before {
            content: "性价比首选";
            position: absolute;
            top: 15px;
            right: 15px;
            background-color: var(--primary-color);
            color: #ffffff;
            font-size: 11px;
            padding: 3px 8px;
            border-radius: 10px;
            font-weight: 600;
        }

        .price-title {
            font-size: 18px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .price-amount {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary-color);
            margin-bottom: 20px;
        }

        .price-amount span {
            font-size: 14px;
            color: var(--text-muted);
            font-weight: 400;
        }

        .price-features {
            list-style: none;
            text-align: left;
            margin-bottom: 30px;
        }

        .price-features li {
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--text-muted);
            position: relative;
            padding-left: 20px;
        }

        .price-features li::before {
            content: "✓";
            position: absolute;
            left: 0;
            color: var(--primary-color);
        }

        /* 培训课程卡片 */
        .training-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 24px;
        }

        .training-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
        }

        .training-card h3 {
            font-size: 20px;
            margin-bottom: 12px;
            color: var(--primary-color);
        }

        .training-desc {
            font-size: 14px;
            color: var(--text-muted);
            margin-bottom: 20px;
        }

        .training-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
            border-top: 1px solid var(--border-color);
            padding-top: 15px;
            color: var(--text-muted);
        }

        /* 服务网络 CSS 图示 */
        .network-layout {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 40px;
            text-align: center;
        }

        .network-dots {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 30px;
        }

        .network-dot {
            background-color: var(--bg-light);
            border: 1px solid var(--border-color);
            padding: 8px 16px;
            border-radius: 8px;
            font-size: 13px;
            font-weight: 500;
            color: var(--text-dark);
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .network-dot::before {
            content: "";
            display: inline-block;
            width: 8px;
            height: 8px;
            background-color: #22c55e;
            border-radius: 50%;
        }

        /* 案例中心 (带有要求的宣传图、素材图) */
        .case-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .case-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            overflow: hidden;
            transition: var(--transition);
        }

        .case-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 12px 24px rgba(0,0,0,0.06);
        }

        .case-image-wrapper {
            position: relative;
            background-color: var(--bg-light);
            overflow: hidden;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .case-image-wrapper img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            transition: var(--transition);
        }

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

        .case-info {
            padding: 20px;
        }

        .case-tag {
            font-size: 11px;
            background-color: var(--accent-color);
            color: var(--accent-text);
            padding: 2px 8px;
            border-radius: 4px;
            font-weight: 600;
            display: inline-block;
            margin-bottom: 10px;
        }

        .case-title {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 8px;
        }

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

        /* 客户评论 */
        .comment-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .comment-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            position: relative;
        }

        .comment-text {
            font-size: 14px;
            color: var(--text-dark);
            margin-bottom: 20px;
            font-style: italic;
        }

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

        .comment-avatar {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--primary-color);
            color: #ffffff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            font-size: 14px;
        }

        .comment-user-info h4 {
            font-size: 14px;
            font-weight: 700;
        }

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

        /* 知识库/资讯 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        .news-card {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 24px;
            display: flex;
            flex-direction: column;
            justify-content: space-between;
            transition: var(--transition);
        }

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

        .news-card h3 {
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .news-card a {
            color: var(--text-dark);
            text-decoration: none;
            transition: var(--transition);
        }

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

        .news-footer {
            margin-top: 15px;
            font-size: 12px;
            color: var(--text-muted);
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        /* 帮助中心 & 百科 */
        .help-layout {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 30px;
        }

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

        .help-box h3 {
            font-size: 18px;
            margin-bottom: 20px;
            color: var(--primary-color);
            border-left: 4px solid var(--primary-color);
            padding-left: 10px;
        }

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

        .help-list li {
            margin-bottom: 12px;
            font-size: 14px;
        }

        .help-list strong {
            color: var(--text-dark);
        }

        .help-list span {
            color: var(--text-muted);
            display: block;
            margin-top: 4px;
        }

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

        .faq-item {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            margin-bottom: 12px;
            overflow: hidden;
        }

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

        .faq-header:hover {
            background-color: var(--bg-light);
        }

        .faq-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-dark);
        }

        .faq-icon {
            font-size: 18px;
            color: var(--text-muted);
            transition: var(--transition);
        }

        .faq-content {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
        }

        .faq-content p {
            padding-bottom: 18px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.6;
        }

        .faq-item.active .faq-content {
            max-height: 200px;
            transition: max-height 0.3s cubic-bezier(1, 0, 1, 0);
        }

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

        /* 需求匹配与联系我们表单 */
        .contact-layout {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr;
            gap: 40px;
        }

        .form-container {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
        }

        .form-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 16px;
            margin-bottom: 16px;
        }

        .form-group {
            display: flex;
            flex-direction: column;
            gap: 6px;
        }

        .form-group.full-width {
            grid-column: span 2;
        }

        .form-label {
            font-size: 13px;
            font-weight: 600;
            color: var(--text-dark);
        }

        .form-input, .form-select, .form-textarea {
            width: 100%;
            padding: 10px 14px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            font-size: 14px;
            outline: none;
            transition: var(--transition);
        }

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

        .form-textarea {
            resize: vertical;
            height: 100px;
        }

        .btn-submit {
            width: 100%;
            background-color: var(--primary-color);
            color: #ffffff;
            border: none;
            padding: 12px;
            border-radius: 8px;
            font-weight: 700;
            font-size: 15px;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn-submit:hover {
            background-color: var(--primary-hover);
        }

        .contact-info {
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 16px;
            padding: 30px;
            display: flex;
            flex-direction: column;
            gap: 20px;
        }

        .info-item {
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .info-title {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
        }

        .info-detail {
            font-size: 15px;
            color: var(--text-dark);
            font-weight: 600;
        }

        .qr-code-area {
            text-align: center;
            border-top: 1px solid var(--border-color);
            padding-top: 20px;
            margin-top: 10px;
        }

        .qr-code-area img {
            width: 120px;
            height: 120px;
            border: 1px solid var(--border-color);
            border-radius: 8px;
            padding: 4px;
            margin-bottom: 8px;
        }

        /* 友情链接与页脚 */
        footer {
            background-color: #0f172a;
            color: #94a3b8;
            padding: 60px 0 20px 0;
            border-top: 1px solid #1e293b;
        }

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

        .footer-brand h4 {
            color: #ffffff;
            font-size: 18px;
            margin-bottom: 12px;
        }

        .footer-brand p {
            font-size: 13px;
            line-height: 1.6;
        }

        .footer-links h5 {
            color: #ffffff;
            font-size: 14px;
            margin-bottom: 16px;
        }

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

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

        .footer-links ul li a {
            color: #94a3b8;
            text-decoration: none;
            font-size: 13px;
            transition: var(--transition);
        }

        .footer-links ul li a:hover {
            color: #ffffff;
        }

        .friend-links {
            border-top: 1px solid #1e293b;
            padding: 20px 0;
            font-size: 12px;
        }

        .friend-links-title {
            color: #ffffff;
            margin-bottom: 8px;
            font-weight: 600;
        }

        .friend-links a {
            color: #64748b;
            text-decoration: none;
            margin-right: 15px;
            transition: var(--transition);
            display: inline-block;
            margin-bottom: 6px;
        }

        .friend-links a:hover {
            color: #ffffff;
        }

        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 20px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 12px;
        }

        .ai-page-home-link {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 700;
        }

        /* 浮动组件 */
        .floating-kefu {
            position: fixed;
            bottom: 30px;
            right: 30px;
            background-color: var(--primary-color);
            color: #ffffff;
            padding: 15px;
            border-radius: 50%;
            box-shadow: 0 4px 16px rgba(0, 82, 217, 0.3);
            cursor: pointer;
            z-index: 999;
            transition: var(--transition);
            width: 56px;
            height: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
        }

        .floating-kefu:hover {
            transform: translateY(-5px) scale(1.05);
            background-color: var(--primary-hover);
        }

        .kefu-popup {
            position: fixed;
            bottom: 96px;
            right: 30px;
            background-color: var(--bg-white);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            padding: 20px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.1);
            display: none;
            z-index: 999;
            text-align: center;
            width: 200px;
        }

        .kefu-popup.show {
            display: block;
        }

        .kefu-popup img {
            width: 100%;
            height: auto;
            border-radius: 6px;
            margin-bottom: 10px;
        }

        .kefu-popup p {
            font-size: 12px;
            color: var(--text-dark);
            font-weight: 600;
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .metrics-grid, .software-grid, .step-grid, .case-grid, .comment-grid, .news-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .about-layout, .contact-layout, .help-layout {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr 1fr;
            }
        }

        @media (max-width: 768px) {
            h1 {
                font-size: 32px;
            }
            .hero-sub {
                font-size: 15px;
            }
            .nav-menu {
                display: none;
                flex-direction: column;
                position: absolute;
                top: 70px;
                left: 0;
                right: 0;
                background-color: var(--bg-white);
                border-bottom: 1px solid var(--border-color);
                padding: 20px;
                gap: 15px;
            }
            .nav-menu.show {
                display: flex;
            }
            .menu-toggle {
                display: block;
            }
            .metrics-grid, .step-grid, .case-grid, .comment-grid, .news-grid, .price-grid, .training-grid {
                grid-template-columns: 1fr;
            }
            .footer-top {
                grid-template-columns: 1fr;
            }
            .form-grid {
                grid-template-columns: 1fr;
            }
            .form-group.full-width {
                grid-column: span 1;
            }
        }