:root {
      --primary-color: #0d9488;
      --primary-hover: #0f766e;
      --primary-light: #f0fdfa;
      --mint-accent: #10b981;
      --mint-soft: #ecfdf5;
      --mint-border: #a7f3d0;
      --text-main: #132e27;
      --text-muted: #3d5a52;
      --text-light: #627d75;
      --bg-main: #f7fdf9;
      --bg-white: #ffffff;
      --bg-card: #ffffff;
      --shadow-sm: 0 2px 8px rgba(13, 148, 136, 0.06);
      --shadow-md: 0 10px 25px -5px rgba(13, 148, 136, 0.1), 0 8px 10px -6px rgba(13, 148, 136, 0.05);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --border-color: #d1fae5;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 24px;
      padding-right: 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
      display: block;
    }

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

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-links a {
      padding: 8px 14px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover,
    .nav-links a.active {
      color: var(--primary-color);
      background-color: var(--mint-soft);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn-header-official {
      padding: 9px 18px;
      font-size: 14px;
      font-weight: 600;
      color: #ffffff;
      background: linear-gradient(135deg, var(--mint-accent), var(--primary-color));
      border-radius: var(--radius-sm);
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }

    .btn-header-official:hover {
      background: linear-gradient(135deg, #059669, #0f766e);
      transform: translateY(-1px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      font-size: 16px;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏纯代码科技风设计：绝无图片 */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      background: radial-gradient(circle at 80% 20%, #e6fffa 0%, #f7fdf9 60%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: var(--mint-soft);
      border: 1px solid var(--mint-border);
      color: var(--primary-color);
      font-size: 13px;
      font-weight: 600;
      border-radius: 999px;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 780px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-actions {
      display: flex;
      justify-content: center;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }

    .btn-main-official {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      background: linear-gradient(135deg, #10b981 0%, #0d9488 100%);
      border-radius: var(--radius-md);
      box-shadow: 0 10px 22px rgba(13, 148, 136, 0.28);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-main-official:hover {
      background: linear-gradient(135deg, #059669 0%, #0f766e 100%);
      box-shadow: 0 12px 28px rgba(13, 148, 136, 0.38);
      transform: translateY(-2px);
    }

    .btn-sub-action {
      padding: 14px 28px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      background-color: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
    }

    .btn-sub-action:hover {
      background-color: var(--mint-soft);
      border-color: var(--mint-border);
      color: var(--primary-color);
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }

    .stat-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s ease;
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-border);
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

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

    /* 通用区块排版 */
    .section-padding {
      padding: 80px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      font-size: 12px;
      font-weight: 700;
      color: var(--primary-color);
      background-color: var(--mint-soft);
      border: 1px solid var(--mint-border);
      padding: 4px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 关于我们 & 宣传图 */
    .grid-about {
      display: grid;
      grid-template-columns: 1.1fr 0.9fr;
      gap: 40px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 24px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

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

    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .about-item {
      background: var(--mint-soft);
      border: 1px solid var(--mint-border);
      border-radius: var(--radius-sm);
      padding: 14px;
    }

    .about-item-title {
      font-weight: 700;
      font-size: 15px;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

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

    .about-banner-container {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .media-card {
      background: var(--bg-white);
      padding: 10px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .media-card img {
      width: 100%;
      height: auto;
      border-radius: calc(var(--radius-md) - 6px);
      display: block;
      object-fit: cover;
    }

    /* 模型与矩阵滚动条 */
    .models-chip-container {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-top: 36px;
      box-shadow: var(--shadow-sm);
    }

    .models-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .models-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-badge {
      background: var(--mint-soft);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      font-size: 13px;
      padding: 6px 14px;
      border-radius: 999px;
      font-weight: 500;
    }

    /* 卡片通用网格 */
    .cards-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .cards-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .feature-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background-color: var(--mint-soft);
      border: 1px solid var(--mint-border);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .feature-card h4 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 对比评测表格板块 */
    .rating-banner {
      background: linear-gradient(135deg, #ecfdf5, #d1fae5);
      border: 1px solid var(--mint-border);
      border-radius: var(--radius-md);
      padding: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }

    .rating-info h4 {
      font-size: 22px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 22px;
      letter-spacing: 2px;
    }

    .score-badge {
      background: var(--primary-color);
      color: #ffffff;
      padding: 8px 18px;
      border-radius: 999px;
      font-size: 18px;
      font-weight: 800;
    }

    .table-container {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
    }

    .benchmark-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

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

    .benchmark-table th {
      background: #f0fdf4;
      font-weight: 700;
      color: var(--text-main);
    }

    .benchmark-table tr:hover td {
      background-color: #fafdfb;
    }

    .cell-highlight {
      font-weight: 700;
      color: var(--primary-color);
      background-color: rgba(16, 185, 129, 0.05);
    }

    /* 流程步骤 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

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

    .step-index {
      font-size: 32px;
      font-weight: 900;
      color: var(--mint-border);
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-box h4 {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background-color: #f1f5f9;
    }

    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

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

    .case-content {
      padding: 20px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .case-tag {
      font-size: 12px;
      color: var(--primary-color);
      font-weight: 600;
      margin-bottom: 6px;
    }

    .case-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .case-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 需求匹配与表单 */
    .matching-box {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .matching-intro h3 {
      font-size: 24px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .matching-intro p {
      color: var(--text-muted);
      margin-bottom: 24px;
      font-size: 14px;
    }

    .matching-perks li {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text-main);
    }

    .matching-perks li::before {
      content: "✓";
      color: #ffffff;
      background: var(--mint-accent);
      width: 20px;
      height: 20px;
      border-radius: 50%;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 11px;
      font-weight: 700;
    }

    .form-wrapper {
      background: var(--mint-soft);
      border: 1px solid var(--mint-border);
      border-radius: var(--radius-md);
      padding: 30px;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(13, 148, 136, 0.15);
    }

    textarea.form-control {
      resize: vertical;
      min-height: 80px;
    }

    .btn-submit {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--mint-accent), var(--primary-color));
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 15px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
      transition: all 0.2s ease;
    }

    .btn-submit:hover {
      background: linear-gradient(135deg, #059669, #0f766e);
      transform: translateY(-1px);
    }

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

    .comment-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .comment-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }

    .comment-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--mint-soft);
      border: 1px solid var(--mint-border);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-weight: 700;
      font-size: 14px;
    }

    .comment-user h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }

    .comment-user span {
      font-size: 12px;
      color: var(--text-light);
    }

    .comment-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* FAQ折叠面板 */
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
      background: #ffffff;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: var(--mint-soft);
    }

    .faq-icon {
      font-size: 16px;
      color: var(--primary-color);
      transition: transform 0.3s ease;
    }

    .faq-answer {
      display: none;
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      border-top: 1px solid rgba(209, 250, 229, 0.5);
      padding-top: 14px;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    /* 资讯与百科 */
    .articles-wrapper {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 30px;
      box-shadow: var(--shadow-sm);
    }

    .article-links-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 16px;
    }

    .article-link-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 16px;
      background: var(--mint-soft);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
    }

    .article-link-item:hover {
      background: #ffffff;
      border-color: var(--mint-accent);
      color: var(--primary-color);
    }

    /* 加盟代理板块 */
    .partner-banner {
      background: linear-gradient(135deg, #0d9488, #10b981);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      color: #ffffff;
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 30px;
      align-items: center;
    }

    .partner-content h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .partner-content p {
      font-size: 15px;
      opacity: 0.92;
      line-height: 1.6;
      margin-bottom: 24px;
    }

    .partner-box-card {
      background: rgba(255, 255, 255, 0.15);
      backdrop-filter: blur(10px);
      border: 1px solid rgba(255, 255, 255, 0.25);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
    }

    .partner-box-card p {
      font-size: 14px;
      margin-bottom: 16px;
    }

    /* 页脚设计 */
    .site-footer {
      background: #0d2922;
      color: #a7f3d0;
      padding: 60px 0 30px;
      border-top: 1px solid #134e40;
    }

    .footer-top {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1fr;
      gap: 36px;
      padding-bottom: 40px;
      border-bottom: 1px solid #195244;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 13.5px;
      color: #a7f3d0;
      line-height: 1.7;
      margin-bottom: 12px;
    }

    .footer-links {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      font-size: 13.5px;
      color: #a7f3d0;
    }

    .footer-links a:hover {
      color: #ffffff;
      text-decoration: underline;
    }

    .qr-container {
      width: 105px;
      height: 105px;
      background: #ffffff;
      padding: 6px;
      border-radius: var(--radius-sm);
      margin-bottom: 8px;
    }

    .qr-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }

    .friendly-links-wrap {
      padding: 24px 0;
      border-bottom: 1px solid #195244;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 14px;
      font-size: 13px;
    }

    .friendly-links-wrap span {
      color: #ffffff;
      font-weight: 600;
    }

    .friendly-links-wrap a {
      color: #a7f3d0;
    }

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

    .footer-bottom {
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: #6ee7b7;
    }

    /* 浮动客服 */
    .floating-contact {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      font-size: 18px;
      cursor: pointer;
      position: relative;
    }

    .float-btn:hover {
      background: var(--mint-soft);
    }

    .float-qr-pop {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      width: 140px;
      text-align: center;
      display: none;
    }

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

    .float-qr-pop img {
      width: 100%;
      height: auto;
      border-radius: 4px;
      margin-bottom: 6px;
    }

    .float-qr-pop span {
      font-size: 12px;
      color: var(--text-main);
      font-weight: 600;
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .header-inner {
        height: 68px;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-about {
        grid-template-columns: 1fr;
      }
      .cards-grid-3, .cards-grid-4, .cases-grid, .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .matching-box {
        grid-template-columns: 1fr;
      }
      .partner-banner {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 26px;
      }
      .section-title {
        font-size: 24px;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .cards-grid-3, .cards-grid-4, .cases-grid, .testimonials-grid, .steps-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .matching-box {
        padding: 20px;
      }
      .form-wrapper {
        padding: 18px;
      }
    }

    /* 移动导航折叠抽屉 */
    .mobile-drawer {
      display: none;
      position: absolute;
      top: 100%;
      left: 0;
      width: 100%;
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      padding: 16px 24px;
      box-shadow: var(--shadow-md);
    }

    .mobile-drawer.open {
      display: block;
    }

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

    .mobile-drawer-links a {
      font-size: 15px;
      color: var(--text-main);
      padding: 6px 0;
    }