:root {
      --primary-color: #00c853;
      --primary-dark: #009624;
      --primary-light: #b9f6ca;
      --accent-green: #10b981;
      --text-main: #111827;
      --text-muted: #4b5563;
      --text-light: #9ca3af;
      --bg-page: #f6fbf8;
      --bg-card: #ffffff;
      --border-color: #d1fae5;
      --border-hover: #10b981;
      --shadow-sm: 0 2px 8px rgba(0, 200, 83, 0.06);
      --shadow-md: 0 8px 24px rgba(0, 200, 83, 0.12);
      --shadow-lg: 0 16px 40px rgba(0, 150, 36, 0.15);
      --transition: all 0.28s ease;
      --radius: 12px;
    }

    * {
      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-page);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

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

    .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, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .brand-logo-wrap .ai-page-logo {
      height: 38px;
      width: auto;
    }

    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      font-size: 0.92rem;
      color: var(--text-main);
      font-weight: 500;
      padding: 8px 14px;
      border-radius: 6px;
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary-dark);
      background-color: rgba(0, 200, 83, 0.08);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.92rem;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 8px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(0, 200, 83, 0.35);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(0, 200, 83, 0.45);
    }

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

    .btn-outline:hover {
      background-color: rgba(0, 200, 83, 0.08);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }

    .menu-toggle svg {
      width: 26px;
      height: 26px;
      stroke: var(--text-main);
    }

    /* 首屏无图 Hero */
    .hero-section {
      position: relative;
      background: linear-gradient(180deg, #ecfdf5 0%, #f6fbf8 100%);
      padding: 80px 0 60px;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-wrap {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #d1fae5;
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 9999px;
      margin-bottom: 24px;
      border: 1px solid #a7f3d0;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: #064e3b;
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

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

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

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

    .btn-hero-official {
      background: #00c853;
      color: #ffffff;
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 10px;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(0, 200, 83, 0.4);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-official:hover {
      background: #009624;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(0, 200, 83, 0.5);
    }

    .hero-stats-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: var(--bg-card);
      padding: 24px 28px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      text-align: left;
    }

    .stat-box-num {
      font-size: 1.75rem;
      font-weight: 800;
      color: var(--primary-dark);
      display: block;
    }

    .stat-box-lbl {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 模块通用样式 */
    .section-block {
      padding: 72px 0;
    }

    .section-block-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

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

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

    .section-heading {
      font-size: 2.1rem;
      font-weight: 800;
      color: #064e3b;
      line-height: 1.35;
      margin-bottom: 14px;
    }

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

    /* 网格卡片 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }

    .card-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .card-icon {
      width: 48px;
      height: 48px;
      background: #ecfdf5;
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      margin-bottom: 18px;
    }

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

    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }

    .tag-pill {
      font-size: 0.75rem;
      background: #e8f5e9;
      color: #1b5e20;
      padding: 3px 10px;
      border-radius: 20px;
      font-weight: 600;
    }

    /* 模型矩阵清单 */
    .models-marquee-wrap {
      background: #ecfdf5;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      margin-top: 36px;
    }

    .models-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: #064e3b;
      margin-bottom: 14px;
      text-align: center;
    }

    .models-chip-grid {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-chip {
      background: #ffffff;
      border: 1px solid #a7f3d0;
      color: #065f46;
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.85rem;
      font-weight: 600;
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
    }

    /* 流程步骤 */
    .workflow-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
    }

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

    .workflow-step-num {
      display: inline-block;
      font-size: 1.4rem;
      font-weight: 900;
      color: var(--primary-color);
      margin-bottom: 10px;
    }

    .workflow-step h3 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .workflow-step p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    /* 媒体与图文展示 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .media-card-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background-color: #f0fdf4;
    }

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

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

    .media-card-body {
      padding: 20px;
    }

    .media-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .media-card-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 对比评测高亮 */
    .evaluation-highlight-box {
      background: linear-gradient(135deg, #00c853 0%, #009624 100%);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 32px;
      margin-bottom: 32px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 24px;
      box-shadow: var(--shadow-md);
    }

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

    .eval-big-score {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      color: #ffffff;
    }

    .eval-score-details h3 {
      font-size: 1.25rem;
      margin-bottom: 4px;
    }

    .eval-stars {
      color: #fef08a;
      font-size: 1.2rem;
    }

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

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

    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #e5e7eb;
      font-size: 0.92rem;
    }

    .eval-table th {
      background: #ecfdf5;
      color: #064e3b;
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background-color: #f9fbf9;
    }

    .highlight-cell {
      color: #009624;
      font-weight: 700;
      background-color: rgba(0, 200, 83, 0.05);
    }

    /* 表单与需求匹配 */
    .form-wrapper {
      max-width: 820px;
      margin: 0 auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }

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

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

    .form-label {
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d1d5db;
      border-radius: 8px;
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background-color: #f9fafb;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary-color);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(0, 200, 83, 0.15);
    }

    .form-textarea {
      resize: vertical;
      min-height: 110px;
    }

    /* 用户评论 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--shadow-sm);
    }

    .testimonial-content {
      font-size: 0.94rem;
      color: var(--text-muted);
      line-height: 1.65;
      margin-bottom: 20px;
      font-style: italic;
    }

    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3f4f6;
      padding-top: 14px;
    }

    .author-avatar-ph {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #ecfdf5;
      color: #009624;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
    }

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

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

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      overflow: hidden;
      transition: var(--transition);
    }

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

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 22px;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      background: none;
      border: none;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }

    .faq-icon {
      font-size: 1.2rem;
      font-weight: 400;
      color: var(--primary-color);
      transition: transform 0.2s ease;
    }

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

    .faq-body {
      padding: 0 22px 18px 22px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
      display: none;
    }

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

    /* 资讯与文章列表 */
    .articles-block-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
    }

    .article-simple-link {
      background: #ffffff;
      padding: 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      gap: 12px;
      transition: var(--transition);
    }

    .article-simple-link:hover {
      border-color: var(--border-hover);
      box-shadow: var(--shadow-sm);
      transform: translateY(-2px);
    }

    .article-meta-tag {
      font-size: 0.75rem;
      color: var(--primary-dark);
      font-weight: 700;
    }

    .article-link-title {
      font-size: 0.98rem;
      font-weight: 600;
      color: var(--text-main);
      line-height: 1.45;
    }

    /* 页面底部与联系 */
    .site-footer {
      background: #0f241a;
      color: #e5e7eb;
      padding-top: 64px;
      padding-bottom: 36px;
      font-size: 0.92rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 48px;
    }

    .footer-col h4 {
      font-size: 1.05rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 18px;
      border-left: 3px solid var(--primary-color);
      padding-left: 10px;
    }

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

    .footer-links-list a {
      color: #9ca3af;
    }

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

    .footer-qrcode-box {
      background: #ffffff;
      padding: 8px;
      border-radius: 8px;
      display: inline-block;
      max-width: 120px;
      margin-top: 8px;
    }

    .friend-links-strip {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-strip h5 {
      font-size: 0.88rem;
      color: #a7f3d0;
      margin-bottom: 12px;
    }

    .friend-links-row {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
    }

    .friend-links-row a {
      color: #9ca3af;
    }

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

    .footer-bottom-bar {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: #9ca3af;
    }

    /* 浮动客服 */
    .float-kefu-widget {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: var(--primary-color);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.2);
      cursor: pointer;
      position: relative;
      transition: var(--transition);
    }

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

    .float-qr-popover {
      position: absolute;
      right: 60px;
      bottom: 0;
      background: #ffffff;
      padding: 12px;
      border-radius: 10px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 140px;
      text-align: center;
      border: 1px solid var(--border-color);
    }

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

    .float-qr-popover p {
      font-size: 0.75rem;
      color: var(--text-main);
      margin-top: 6px;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .nav-links {
        display: none;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .hero-stats-row {
        grid-template-columns: 1fr 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.8rem;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .hero-stats-row {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom-bar {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
    }

    /* 移动端展开导航 */
    .mobile-nav-panel {
      position: fixed;
      top: 72px;
      left: 0;
      width: 100%;
      background: #ffffff;
      border-bottom: 2px solid var(--primary-color);
      box-shadow: var(--shadow-lg);
      padding: 20px;
      display: none;
      z-index: 999;
    }

    .mobile-nav-panel.open {
      display: block;
    }

    .mobile-nav-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .mobile-nav-list a {
      font-size: 1rem;
      font-weight: 600;
      padding: 8px 0;
      border-bottom: 1px dashed #e5e7eb;
      display: block;
    }