:root {
      --primary: #0a8f78;
      --primary-dark: #076d5b;
      --primary-light: #e6f6f3;
      --secondary: #0d4b68;
      --accent: #2ac3a2;
      --bg-main: #f5f9f8;
      --bg-card: #ffffff;
      --border-color: #d8ece7;
      --text-main: #142825;
      --text-muted: #4e6360;
      --shadow-sm: 0 4px 12px rgba(10, 143, 120, 0.06);
      --shadow-md: 0 8px 24px rgba(10, 143, 120, 0.1);
      --radius: 10px;
    }
    * {
      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;
      position: relative;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }
    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      margin-bottom: 45px;
    }
    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      background-color: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: 20px;
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }
    .brand-name {
      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 {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      cursor: pointer;
      transition: all 0.25s ease;
      border: 1px solid transparent;
      text-align: center;
    }
    .btn-primary {
      background: linear-gradient(135deg, #0a8f78 0%, #0d4b68 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(10, 143, 120, 0.25);
    }
    .btn-primary:hover {
      box-shadow: 0 6px 18px rgba(10, 143, 120, 0.35);
      transform: translateY(-1px);
    }
    .btn-outline {
      background-color: #ffffff;
      color: var(--primary-dark);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--primary-light);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 首屏 Hero (禁止任何图片) */
    .hero-section {
      background: linear-gradient(180deg, #eaf6f4 0%, #f5f9f8 100%);
      padding: 90px 0 75px;
      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-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      color: var(--primary);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }
    .hero-badge span {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent);
    }
    .hero-title {
      font-size: 2.75rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 22px;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }
    .hero-cta {
      display: flex;
      justify-content: center;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 45px;
    }
    .hero-cta .btn-hero-main {
      font-size: 1.05rem;
      padding: 13px 32px;
      border-radius: 30px;
    }
    .hero-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
      margin-top: 15px;
    }
    .hero-tag-item {
      font-size: 0.85rem;
      background-color: rgba(255, 255, 255, 0.7);
      border: 1px solid var(--border-color);
      padding: 4px 12px;
      border-radius: 16px;
      color: var(--text-muted);
    }

    /* 数据指标网格 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 50px;
    }
    .metric-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: inherit;
    }
    .metric-label {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 4px;
    }
    .metric-note {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* 平台矩阵与支持模型 */
    .models-bar {
      background-color: #ffffff;
      padding: 20px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      margin-top: 30px;
    }
    .models-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--primary-dark);
      text-transform: uppercase;
      letter-spacing: 0.5px;
      margin-bottom: 12px;
      text-align: center;
    }
    .model-pills {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }
    .model-pill {
      font-size: 0.82rem;
      padding: 4px 10px;
      background-color: var(--bg-main);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 通用网格布局 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
      align-items: center;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    /* 服务卡片 */
    .service-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.25s ease;
    }
    .service-card:hover {
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 10px;
      background-color: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
      font-weight: 700;
    }
    .service-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .service-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .service-points {
      list-style: none;
      margin-bottom: 18px;
    }
    .service-points li {
      font-size: 0.88rem;
      color: var(--text-main);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .service-points li::before {
      content: "•";
      color: var(--primary);
      font-weight: bold;
    }

    /* 图片与视觉卡片 */
    .img-wrap {
      width: 100%;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background-color: #e2edea;
      box-shadow: var(--shadow-sm);
    }
    .img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }
    .img-wrap:hover img {
      transform: scale(1.02);
    }

    /* 步骤与流程 */
    .steps-container {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-box {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      display: inline-block;
      font-size: 0.85rem;
      font-weight: 800;
      color: var(--primary);
      background-color: var(--primary-light);
      padding: 4px 10px;
      border-radius: 6px;
      margin-bottom: 14px;
    }
    .step-name {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格与卡片 */
    .compare-wrapper {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .rating-banner {
      background: linear-gradient(135deg, #0a8f78 0%, #0d4b68 100%);
      color: #ffffff;
      padding: 24px 30px;
      border-radius: var(--radius);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      margin-bottom: 30px;
    }
    .rating-score {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1;
    }
    .rating-title {
      font-size: 1.3rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .rating-stars {
      color: #ffdf40;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      margin-top: 10px;
    }
    .compare-table th,
    .compare-table td {
      padding: 16px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.93rem;
    }
    .compare-table th {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table tr:hover {
      background-color: #fafdfc;
    }
    .badge-highlight {
      display: inline-block;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 600;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.85rem;
    }

    /* Token 比价卡片 */
    .pricing-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      position: relative;
    }
    .pricing-badge {
      position: absolute;
      top: 16px;
      right: 16px;
      background-color: var(--primary);
      color: #fff;
      font-size: 0.78rem;
      padding: 3px 10px;
      border-radius: 12px;
    }
    .pricing-price {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
      margin: 14px 0;
    }
    .pricing-price small {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 400;
    }

    /* 客户评论卡片 */
    .testimonial-card {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-quote {
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 20px;
      line-height: 1.65;
      font-style: italic;
    }
    .testimonial-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }
    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
    }
    .author-name {
      font-size: 0.95rem;
      font-weight: 700;
    }
    .author-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴面板 */
    .faq-list {
      max-width: 900px;
      margin: 0 auto;
    }
    .faq-item {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      width: 100%;
      text-align: left;
      background: none;
      border: none;
      padding: 18px 22px;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
    }
    .faq-question:hover {
      background-color: #fafcfb;
    }
    .faq-toggle-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      background-color: #fafdfc;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 250px;
      padding: 0 22px 18px 22px;
    }

    /* 表单与需求匹配 */
    .form-container {
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-sm);
      max-width: 800px;
      margin: 0 auto;
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
      background-color: #ffffff;
      color: var(--text-main);
      outline: none;
      transition: border-color 0.2s;
    }
    .form-control:focus {
      border-color: var(--primary);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 文章列表 & 友情链接 */
    .article-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 20px;
    }
    .article-pill {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      background-color: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--text-main);
      transition: all 0.2s ease;
    }
    .article-pill:hover {
      border-color: var(--primary);
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .footer-links-wrap a {
      color: var(--text-muted);
      margin-right: 16px;
      font-size: 0.9rem;
      display: inline-block;
      margin-bottom: 8px;
      transition: color 0.2s;
    }
    .footer-links-wrap a:hover {
      color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background-color: #eef6f4;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      color: var(--text-main);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 16px;
    }
    .footer-text {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }
    .footer-qr {
      width: 110px;
      height: 110px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      padding: 4px;
      background-color: #ffffff;
      display: inline-block;
    }
    .footer-qr img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 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(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(10, 143, 120, 0.35);
      cursor: pointer;
      border: none;
      transition: transform 0.2s;
      position: relative;
    }
    .float-btn:hover {
      transform: scale(1.08);
      background-color: var(--primary-dark);
    }
    .float-qr-pop {
      display: none;
      position: absolute;
      right: 60px;
      bottom: 0;
      background-color: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 12px;
      box-shadow: var(--shadow-md);
      text-align: center;
      width: 140px;
    }
    .float-btn:hover .float-qr-pop {
      display: block;
    }
    .float-qr-pop img {
      width: 100%;
      height: auto;
      display: block;
      margin-bottom: 6px;
    }
    .float-qr-pop span {
      font-size: 0.75rem;
      color: var(--text-main);
      display: block;
    }

    /* 移动端响应式 */
    @media (max-width: 992px) {
      .grid-3, .metrics-grid, .steps-container {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .nav-links {
        display: none;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background-color: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 14px;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title {
        font-size: 2.2rem;
      }
    }
    @media (max-width: 768px) {
      .grid-2, .grid-3, .grid-4, .metrics-grid, .steps-container {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.85rem;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
      }
      .compare-wrapper {
        padding: 18px;
        overflow-x: auto;
      }
      .compare-table {
        min-width: 580px;
      }
    }