:root {
      --primary: #e60067;
      --primary-hover: #c40057;
      --primary-light: #fff0f6;
      --primary-gradient: linear-gradient(135deg, #ff2a85 0%, #e60067 50%, #b8004f 100%);
      --accent: #ff4d94;
      --dark: #1f1f2e;
      --text-main: #2b2b36;
      --text-sub: #5f5f6e;
      --bg-light: #fffcfd;
      --card-bg: #ffffff;
      --border-color: #ffd6e7;
      --shadow-sm: 0 4px 12px rgba(230, 0, 103, 0.06);
      --shadow-md: 0 8px 24px rgba(230, 0, 103, 0.1);
      --shadow-lg: 0 16px 36px rgba(230, 0, 103, 0.14);
      --radius: 12px;
      --container-width: 1200px;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      background: radial-gradient(circle at 10% 20%, #fff0f5 0%, #ffffff 90%);
      min-height: 100vh;
      overflow-x: hidden;
    }

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

    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }

    /* 顶部导航 */
    header.site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

    .logo-box {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .logo-box img.ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

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

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

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

    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      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);
    }

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

    .btn-nav-primary {
      background: var(--primary-gradient);
      color: #fff;
      padding: 8px 18px;
      border-radius: 30px;
      font-size: 0.9rem;
      font-weight: 600;
      box-shadow: 0 4px 14px rgba(230, 0, 103, 0.25);
    }

    .btn-nav-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(230, 0, 103, 0.35);
    }

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

    /* 首屏 Hero */
    .hero-section {
      padding: 80px 0 60px;
      text-align: center;
      position: relative;
      background: linear-gradient(180deg, #fff5f8 0%, #ffffff 100%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      color: var(--primary);
      border-radius: 50px;
      font-size: 0.85rem;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 900;
      color: #111827;
      line-height: 1.25;
      margin-bottom: 20px;
    }

    .hero-title span {
      color: var(--primary);
      text-decoration: underline wavy var(--accent);
      text-underline-offset: 8px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      max-width: 820px;
      margin: 0 auto 36px;
    }

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

    .btn-hero-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      padding: 14px 34px;
      border-radius: 40px;
      font-size: 1.05rem;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(230, 0, 103, 0.3);
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }

    .btn-hero-primary:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 28px rgba(230, 0, 103, 0.4);
    }

    .btn-hero-secondary {
      background: #ffffff;
      color: var(--primary);
      border: 2px solid var(--primary);
      padding: 12px 30px;
      border-radius: 40px;
      font-size: 1.05rem;
      font-weight: 700;
    }

    .btn-hero-secondary:hover {
      background: var(--primary-light);
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 30px;
    }

    .metric-card {
      background: #ffffff;
      padding: 24px 16px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .metric-value {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 6px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-sub);
    }

    /* 模块通用样式 */
    section.site-section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

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

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: #111827;
      margin-bottom: 12px;
    }

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

    /* 平台介绍 */
    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-text-content h3 {
      font-size: 1.6rem;
      font-weight: 700;
      margin-bottom: 18px;
      color: #111827;
    }

    .about-text-content p {
      font-size: 1rem;
      color: var(--text-sub);
      margin-bottom: 16px;
    }

    .about-feature-list {
      list-style: none;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-top: 24px;
    }

    .about-feature-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 600;
      font-size: 0.95rem;
    }

    .about-feature-item::before {
      content: "✓";
      color: var(--primary);
      font-weight: 900;
    }

    .about-visual-box {
      background: linear-gradient(135deg, #ffeef5 0%, #fff 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-md);
    }

    .about-visual-box .ai-page-image,
    .about-visual-box img {
      width: 100%;
      height: auto;
      border-radius: 8px;
      display: block;
    }

    /* 服务场景网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      position: relative;
    }

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

    .service-icon-badge {
      width: 44px;
      height: 44px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }

    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 10px;
      color: #111827;
    }

    .service-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
      line-height: 1.5;
    }

    /* 模型矩阵标签 */
    .model-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-pill {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: 20px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 6px rgba(0, 0, 0, 0.02);
      transition: all 0.2s;
    }

    .model-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }

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

    .step-card {
      background: #ffffff;
      border: 1px dashed var(--border-color);
      border-radius: var(--radius);
      padding: 24px 18px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-gradient);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin: 0 auto 16px;
    }

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

    .step-card p {
      font-size: 0.85rem;
      color: var(--text-sub);
    }

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

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

    .case-img-wrap {
      width: 100%;
      height: 200px;
      overflow: hidden;
      background: #f8f8fa;
    }

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

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

    .case-content {
      padding: 20px;
    }

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

    .case-content p {
      font-size: 0.88rem;
      color: var(--text-sub);
      margin-bottom: 12px;
    }

    .case-tag {
      font-size: 0.75rem;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 8px;
      border-radius: 4px;
      display: inline-block;
    }

    /* 对比评测 */
    .eval-highlight {
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      display: flex;
      justify-content: space-around;
      align-items: center;
      margin-bottom: 30px;
      text-align: center;
    }

    .eval-score-num {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--primary);
    }

    .eval-stars {
      color: #ff9800;
      font-size: 1.2rem;
      margin-bottom: 4px;
    }

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

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

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f0f5;
      font-size: 0.92rem;
    }

    .custom-table th {
      background: #fafafa;
      font-weight: 700;
      color: #111827;
    }

    .custom-table td.brand-col {
      font-weight: 700;
      color: var(--primary);
      background: #fffbfe;
    }

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

    .review-card {
      background: #ffffff;
      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;
    }

    .review-quote {
      font-size: 0.92rem;
      color: var(--text-main);
      margin-bottom: 16px;
      font-style: normal;
      line-height: 1.6;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f5f5f7;
      padding-top: 12px;
    }

    .author-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
    }

    .author-info h4 {
      font-size: 0.9rem;
      color: #111827;
    }

    .author-info span {
      font-size: 0.78rem;
      color: var(--text-sub);
    }

    /* FAQ 折叠面板 */
    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
    }

    .faq-question {
      padding: 18px 20px;
      width: 100%;
      background: none;
      border: none;
      text-align: left;
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: background 0.2s;
    }

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

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

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: #fffdfd;
      padding: 0 20px;
      color: var(--text-sub);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 20px 18px 20px;
    }

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

    .contact-info-col h3 {
      font-size: 1.5rem;
      margin-bottom: 16px;
      color: #111827;
    }

    .contact-info-col p {
      font-size: 0.95rem;
      color: var(--text-sub);
      margin-bottom: 24px;
    }

    .contact-details-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-details-list li {
      font-size: 0.95rem;
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .qr-container {
      margin-top: 10px;
      width: 140px;
      border: 1px solid var(--border-color);
      padding: 6px;
      border-radius: 8px;
      background: #fff;
    }

    .qr-container img {
      width: 100%;
      height: auto;
      display: block;
    }

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

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

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

    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #dcdce6;
      border-radius: 8px;
      font-size: 0.92rem;
      outline: none;
      transition: border-color 0.2s;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
    }

    .btn-submit {
      background: var(--primary-gradient);
      color: #ffffff;
      border: none;
      padding: 14px;
      border-radius: 8px;
      font-size: 1rem;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(230, 0, 103, 0.25);
    }

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

    /* 资讯与外链 */
    .articles-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      margin-bottom: 30px;
    }

    .articles-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      list-style: none;
      margin-top: 14px;
    }

    .articles-links-list li a {
      color: var(--primary);
      background: var(--primary-light);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 0.88rem;
    }

    .articles-links-list li a:hover {
      background: var(--primary);
      color: #fff;
    }

    /* 友情链接与页脚 */
    footer.site-footer {
      background: #191924;
      color: #d1d1db;
      padding: 60px 0 30px;
      border-top: 4px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 0.88rem;
      line-height: 1.6;
      color: #a0a0b0;
    }

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

    .footer-col ul li a {
      font-size: 0.88rem;
      color: #a0a0b0;
    }

    .footer-col ul li a:hover {
      color: var(--accent);
    }

    .friendly-links-wrap {
      border-top: 1px solid #2b2b3a;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friendly-links-wrap h5 {
      color: #ffffff;
      font-size: 0.9rem;
      margin-bottom: 12px;
    }

    .links-tags-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .links-tags-flex a {
      color: #8f8f9e;
      font-size: 0.85rem;
    }

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

    .footer-bottom {
      border-top: 1px solid #2b2b3a;
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #707080;
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(230, 0, 103, 0.4);
      cursor: pointer;
      font-size: 1.2rem;
      border: none;
      transition: transform 0.2s;
    }

    .float-btn:hover {
      transform: scale(1.1);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .services-grid,
      .cases-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-metrics,
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid,
      .contact-wrapper,
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      nav.main-nav {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
      }
      nav.main-nav.show {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
      .services-grid,
      .cases-grid,
      .reviews-grid,
      .hero-metrics,
      .steps-grid {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.75rem;
      }
    }