:root {
      --primary-color: #00a870;
      --primary-hover: #008f5d;
      --primary-light: #e8f8f2;
      --mint-accent: #2cd49f;
      --bg-page: #f5fbf8;
      --bg-surface: #ffffff;
      --text-main: #192e26;
      --text-muted: #527063;
      --border-color: #d8ede3;
      --shadow-sm: 0 4px 12px rgba(0, 70, 45, 0.05);
      --shadow-md: 0 8px 24px rgba(0, 70, 45, 0.08);
      --shadow-lg: 0 16px 36px rgba(0, 70, 45, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 18px;
    }

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

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

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

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

    .brand-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }

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

    .nav-links a {
      font-size: 0.92rem;
      color: var(--text-main);
      font-weight: 500;
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: all 0.2s ease;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      line-height: 1;
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(0, 168, 112, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0, 168, 112, 0.35);
    }

    .btn-outline {
      background-color: #ffffff;
      color: var(--primary-color) !important;
      border-color: var(--primary-color);
    }

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

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 70px 0 60px;
      background: linear-gradient(180deg, #e8f8f2 0%, #f5fbf8 100%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: #ffffff;
      color: var(--primary-color);
      font-size: 0.88rem;
      font-weight: 600;
      border-radius: 50px;
      border: 1px solid var(--border-color);
      margin-bottom: 20px;
      box-shadow: var(--shadow-sm);
    }

    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 34px;
      line-height: 1.7;
    }

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

    .hero-cta .btn {
      padding: 14px 28px;
      font-size: 1.05rem;
    }

    .stats-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 40px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }

    .stat-num {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用章节 */
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-wrap.alt-bg {
      background-color: #ffffff;
    }

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

    .section-tag {
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      color: var(--primary-color);
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.35;
      margin-bottom: 14px;
    }

    .section-intro {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 网格系统 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 32px;
    }

    /* 卡片通用 */
    .feature-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 12px;
      color: var(--text-main);
    }

    .feature-card p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 场景胶囊清单 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

    .scenario-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }

    .scenario-box:hover {
      border-color: var(--primary-color);
      box-shadow: var(--shadow-md);
    }

    .scenario-box h4 {
      font-size: 1.1rem;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .scenario-box p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 标签云 (模型支持) */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 24px;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .model-tag {
      background: var(--bg-page);
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      color: var(--text-main);
      font-weight: 500;
      transition: all 0.2s ease;
    }

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

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

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-number {
      display: inline-block;
      width: 36px;
      height: 36px;
      line-height: 36px;
      text-align: center;
      background: var(--primary-color);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 1.15rem;
      font-weight: 600;
      margin-bottom: 10px;
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测专属样式 */
    .review-highlight {
      background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      flex-wrap: wrap;
    }

    .review-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-badge {
      font-size: 3.5rem;
      font-weight: 900;
      color: var(--primary-color);
      line-height: 1;
    }

    .score-info h3 {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 6px;
    }

    .stars {
      color: #ff9800;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .custom-table th {
      background-color: #f8fdfa;
      color: var(--text-main);
      font-weight: 700;
    }

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

    .custom-table tr:hover td {
      background-color: var(--primary-light);
    }

    .highlight-col {
      color: var(--primary-color);
      font-weight: 700;
      background-color: rgba(232, 248, 242, 0.4);
    }

    /* 案例展示 */
    .case-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-media-box {
      width: 100%;
      height: 220px;
      overflow: hidden;
      background: #e6f0eb;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-media-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.3s ease;
    }

    .case-card:hover .case-media-box img {
      transform: scale(1.04);
    }

    .case-content {
      padding: 24px;
      flex-grow: 1;
      display: flex;
      flex-direction: column;
    }

    .case-content h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
    }

    .case-content p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 客户评论卡片 */
    .comment-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .comment-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: italic;
    }

    .comment-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
    }

    .author-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .author-meta h4 {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }

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

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

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

    .faq-question {
      padding: 18px 24px;
      font-size: 1.05rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      user-select: none;
      transition: background-color 0.2s ease;
    }

    .faq-question:hover {
      background-color: var(--primary-light);
    }

    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform 0.2s ease;
    }

    .faq-item.active .faq-question::after {
      content: '−';
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
      border-top: 1px solid #f0f7f3;
    }

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

    /* 需求表单模块 */
    .form-container-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

    .contact-form {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

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

    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #fafdfc;
      outline: none;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(0, 168, 112, 0.15);
      background-color: #ffffff;
    }

    textarea.form-control {
      resize: vertical;
      min-height: 120px;
    }

    /* 文章与资讯列表 */
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .news-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      transition: all 0.2s ease;
    }

    .news-item:hover {
      border-color: var(--primary-color);
      transform: translateX(4px);
    }

    .news-item-title {
      font-size: 0.98rem;
      font-weight: 500;
      color: var(--text-main);
    }

    .news-item-arrow {
      color: var(--primary-color);
      font-weight: 700;
    }

    /* 加盟代理区块 */
    .partner-banner {
      background: linear-gradient(135deg, #e8f8f2 0%, #d2f2e5 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 44px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
    }

    .partner-text h3 {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .partner-text p {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 600px;
    }

    /* 页脚 */
    .site-footer {
      background: #142820;
      color: #e3efe9;
      padding: 60px 0 30px;
      border-top: 1px solid #1f3d31;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-brand h4 {
      font-size: 1.3rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 14px;
    }

    .footer-brand p {
      font-size: 0.9rem;
      color: #9cb8ab;
      line-height: 1.7;
      margin-bottom: 16px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 600;
      color: #ffffff;
      margin-bottom: 16px;
      border-left: 3px solid var(--mint-accent);
      padding-left: 8px;
    }

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

    .footer-links a {
      font-size: 0.88rem;
      color: #9cb8ab;
    }

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

    .qr-card {
      text-align: center;
      background: #1c362c;
      padding: 14px;
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .qr-card img {
      width: 110px;
      height: 110px;
      border-radius: 4px;
      display: block;
      margin: 0 auto 8px;
    }

    .qr-card span {
      font-size: 0.78rem;
      color: #9cb8ab;
    }

    .friend-links-bar {
      border-top: 1px solid #234537;
      padding: 24px 0;
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
      font-size: 0.85rem;
      color: #9cb8ab;
    }

    .friend-links-bar a {
      color: #b7d6c7;
    }

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

    .footer-bottom {
      border-top: 1px solid #234537;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
      color: #7b998c;
    }

    /* 悬浮侧栏 */
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-color);
      cursor: pointer;
      position: relative;
      transition: all 0.25s ease;
    }

    .float-btn:hover {
      background: var(--primary-color);
      color: #ffffff;
      transform: scale(1.08);
    }

    .float-popover {
      display: none;
      position: absolute;
      right: 56px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      width: 140px;
      text-align: center;
    }

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

    .float-popover span {
      font-size: 0.75rem;
      color: var(--text-main);
    }

    .float-btn:hover .float-popover {
      display: block;
    }

    /* 响应式媒体查询 */
    @media (max-width: 992px) {
      .grid-4, .step-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .stats-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .partner-banner {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .grid-3, .grid-2, .grid-4, .step-timeline {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .hero-desc {
        font-size: 1rem;
      }
      .contact-form {
        grid-template-columns: 1fr;
      }
      .form-group.full-width {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .float-panel {
        right: 12px;
        bottom: 20px;
      }
    }