:root {
      --primary-color: #059669;
      --primary-hover: #047857;
      --primary-light: #ecfdf5;
      --primary-glow: rgba(16, 185, 129, 0.2);
      --accent-green: #10b981;
      --accent-bright: #34d399;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-surface: #ffffff;
      --bg-subtle: #f0fdf4;
      --border-color: #e2e8f0;
      --border-green: #a7f3d0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.04);
      --shadow-lg: 0 10px 15px -3px rgba(5, 150, 105, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --shadow-hover: 0 20px 25px -5px rgba(5, 150, 105, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: var(--font-sans);
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: linear-gradient(180deg, #f0fdf4 0%, #f8fafc 18%, #f8fafc 85%, #f0fdf4 100%);
      color: var(--text-main);
      min-width: 320px;
      overflow-x: hidden;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-green);
      box-shadow: var(--shadow-sm);
    }

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

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

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
      display: block;
    }

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

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

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      display: inline-block;
      padding: 8px 14px;
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      transition: color 0.2s, background-color 0.2s;
      border-radius: var(--radius-sm);
    }

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

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }

    .btn-header {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      background-color: var(--primary-color);
      color: #ffffff !important;
      font-size: 0.9rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: var(--radius-full);
      box-shadow: 0 2px 8px rgba(5, 150, 105, 0.25);
      transition: all 0.2s ease;
    }

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

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

    /* 英雄区 (Hero) */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
      background: radial-gradient(circle at 50% 20%, rgba(16, 185, 129, 0.15) 0%, rgba(240, 253, 244, 0) 70%);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: var(--primary-light);
      border: 1px solid var(--border-green);
      border-radius: var(--radius-full);
      color: var(--primary-color);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
      animation: pulseBadge 2.5s infinite;
    }

    @keyframes pulseBadge {
      0%, 100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.4); }
      50% { box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title .highlight-green {
      color: var(--primary-color);
      position: relative;
      display: inline-block;
    }

    .hero-title .highlight-green::after {
      content: "";
      position: absolute;
      bottom: 4px;
      left: 0;
      right: 0;
      height: 8px;
      background-color: rgba(52, 211, 153, 0.35);
      z-index: -1;
      border-radius: 4px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 48px;
    }

    .btn-main-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 32px;
      background-color: var(--primary-color);
      color: #ffffff !important;
      font-size: 1.05rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: var(--radius-full);
      box-shadow: 0 4px 14px rgba(5, 150, 105, 0.35);
      transition: all 0.25s ease;
    }

    .btn-main-action:hover {
      background-color: var(--primary-hover);
      transform: translateY(-2px);
      box-shadow: 0 6px 20px rgba(5, 150, 105, 0.45);
    }

    .btn-secondary-action {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 28px;
      background-color: var(--bg-surface);
      color: var(--text-main);
      border: 1px solid var(--border-color);
      font-size: 1rem;
      font-weight: 600;
      text-decoration: none;
      border-radius: var(--radius-full);
      transition: all 0.25s ease;
    }

    .btn-secondary-action:hover {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background-color: var(--primary-light);
    }

    /* 数据指标网格 */
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-surface);
      border: 1px solid var(--border-green);
      padding: 24px 32px;
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-md);
      margin-top: 10px;
    }

    .metric-item {
      text-align: center;
      border-right: 1px solid var(--border-color);
    }

    .metric-item:last-child {
      border-right: none;
    }

    .metric-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-color);
      line-height: 1.1;
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 模块通用样式 */
    section.page-section {
      padding: 60px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      border: 1px solid var(--border-green);
      color: var(--primary-color);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.3px;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 平台介绍 */
    .about-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-green);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .about-text h3 {
      font-size: 1.5rem;
      font-weight: 700;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .about-text p {
      color: var(--text-muted);
      margin-bottom: 16px;
      font-size: 0.975rem;
      line-height: 1.7;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 20px;
    }

    .model-tag {
      padding: 6px 12px;
      background-color: var(--bg-page);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.825rem;
      font-weight: 600;
      color: var(--text-muted);
    }

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

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

    .service-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      border-color: var(--primary-color);
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      background-color: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      margin-bottom: 18px;
      font-weight: 700;
      font-size: 1.2rem;
    }

    .service-card h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }

    .service-card p {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .flow-step-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      position: relative;
    }

    .step-badge {
      width: 36px;
      height: 36px;
      background-color: var(--primary-color);
      color: #fff;
      font-weight: 800;
      border-radius: var(--radius-full);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .flow-step-card h3 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .flow-step-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    /* 案例中心图文 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

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

    .case-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background-color: #e2e8f0;
    }

    .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(1.03);
    }

    .case-content {
      padding: 24px;
    }

    .case-content h3 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

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

    /* 对比评测表格与评分板 */
    .review-score-board {
      background: linear-gradient(135deg, var(--bg-subtle) 0%, #ffffff 100%);
      border: 1px solid var(--border-green);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }

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

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

    .score-stars {
      color: #eab308;
      font-size: 1.3rem;
      margin-bottom: 4px;
    }

    .score-meta {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      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: 0.925rem;
    }

    .custom-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .custom-table tr:hover {
      background-color: var(--bg-subtle);
    }

    .table-tag-win {
      color: var(--primary-color);
      font-weight: 700;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

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

    .review-card {
      background: var(--bg-surface);
      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;
    }

    .review-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer-info {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .reviewer-avatar {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-full);
      background-color: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 表单与联系区 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      background: var(--bg-surface);
      border: 1px solid var(--border-green);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .contact-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

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

    .form-group label {
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.925rem;
      font-family: inherit;
      color: var(--text-main);
      background-color: var(--bg-page);
      transition: border-color 0.2s;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary-color);
      background-color: #ffffff;
    }

    .btn-submit {
      padding: 14px;
      background-color: var(--primary-color);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      transition: background-color 0.2s, transform 0.1s;
    }

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

    .contact-details {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .qr-box {
      display: flex;
      align-items: center;
      gap: 20px;
      background: var(--bg-subtle);
      padding: 20px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-green);
      margin-top: 20px;
    }

    .qr-box img {
      width: 100px;
      height: 100px;
      border-radius: var(--radius-sm);
      object-fit: contain;
      background: #ffffff;
      padding: 4px;
      border: 1px solid var(--border-color);
    }

    .qr-desc h4 {
      font-size: 1rem;
      color: var(--primary-color);
      margin-bottom: 4px;
    }

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

    /* FAQ 手风琴 */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-item.active {
      border-color: var(--primary-color);
    }

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      text-align: left;
      background: none;
      border: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .faq-item.active .faq-icon {
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-muted);
      font-size: 0.925rem;
      line-height: 1.7;
    }

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

    /* 最新文章与资讯 */
    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-card a {
      color: var(--text-main);
      text-decoration: none;
      font-weight: 700;
      font-size: 1rem;
      line-height: 1.5;
      margin-bottom: 12px;
      display: block;
    }

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

    .article-date {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    /* 友情链接与页脚 */
    footer.site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-green);
      padding: 48px 0 32px;
      color: var(--text-muted);
    }

    .footer-top-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.9rem;
      transition: color 0.2s;
    }

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

    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding: 20px 0;
      margin-bottom: 24px;
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      gap: 16px;
    }

    .friend-links-box span {
      font-weight: 700;
      font-size: 0.875rem;
      color: var(--text-main);
    }

    .friend-links-box a {
      color: var(--text-light);
      text-decoration: none;
      font-size: 0.875rem;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      text-align: center;
      font-size: 0.875rem;
      color: var(--text-light);
    }

    /* 悬浮客服 */
    .float-kefu-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background-color: var(--primary-color);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-lg);
      text-decoration: none;
      font-size: 1.2rem;
      cursor: pointer;
      border: none;
      transition: transform 0.2s, background-color 0.2s;
    }

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

    /* 响应式调整 */
    @media (max-width: 992px) {
      .cards-grid,
      .reviews-grid,
      .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .flow-steps {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .about-grid,
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-menu-wrapper {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-green);
        flex-direction: column;
        padding: 20px;
        display: none;
        box-shadow: var(--shadow-md);
      }
      .nav-menu-wrapper.show {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 8px;
      }
      .nav-links li {
        width: 100%;
        text-align: center;
      }
      .nav-actions {
        margin-left: 0;
        margin-top: 16px;
        width: 100%;
        justify-content: center;
      }
      .hero-title {
        font-size: 2rem;
      }
      .cards-grid,
      .reviews-grid,
      .articles-grid,
      .case-grid,
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .hero-metrics {
        grid-template-columns: 1fr;
      }
      .metric-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding-bottom: 12px;
      }
      .metric-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
    }