:root {
      --primary: #e6005c;
      --primary-hover: #c4004e;
      --primary-light: #fff0f5;
      --secondary: #ff3385;
      --accent: #9c27b0;
      --text-main: #1f242e;
      --text-muted: #5a6474;
      --bg-page: #fff8fa;
      --bg-surface: #ffffff;
      --border-color: #f7d2e0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --shadow-soft: 0 10px 30px rgba(230, 0, 92, 0.06);
      --shadow-hover: 0 16px 36px rgba(230, 0, 92, 0.14);
      --transition: all 0.28s ease-in-out;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

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

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1240px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

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

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

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

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

    .nav-links a {
      display: inline-block;
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

    .nav-links a:hover {
      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: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
      color: #ffffff;
      box-shadow: 0 6px 18px rgba(230, 0, 92, 0.25);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(230, 0, 92, 0.35);
      color: #ffffff;
    }

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

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

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

    .mobile-menu-btn span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* 首屏 Hero (无图片) */
    .hero-section {
      padding: 80px 0 60px;
      background: radial-gradient(circle at 80% 20%, #ffe6f0 0%, #fff8fa 65%);
      position: relative;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.2fr 0.8fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 14px;
      background-color: #ffe6f0;
      color: var(--primary);
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 700;
      margin-bottom: 20px;
      border: 1px solid #ffccd9;
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      margin-bottom: 32px;
      line-height: 1.8;
    }

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

    .hero-cta-group .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      padding-top: 24px;
      border-top: 1px solid rgba(230, 0, 92, 0.12);
    }

    .hero-stat-item h3 {
      font-size: 1.65rem;
      color: var(--primary);
      font-weight: 800;
    }

    .hero-stat-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 首屏右侧纯CSS几何视觉卡片 */
    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-soft);
      position: relative;
    }

    .visual-pill-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .visual-pill-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 18px;
      background: var(--bg-page);
      border-radius: var(--radius-md);
      border: 1px solid #ffe6f0;
      transition: var(--transition);
    }

    .visual-pill-item:hover {
      transform: translateX(6px);
      border-color: var(--secondary);
      background: #ffffff;
      box-shadow: 0 4px 14px rgba(230, 0, 92, 0.08);
    }

    .visual-pill-left {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .visual-dot {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
      box-shadow: 0 0 10px var(--primary);
    }

    .visual-pill-text {
      font-weight: 600;
      font-size: 0.95rem;
    }

    .visual-tag {
      font-size: 0.75rem;
      color: var(--primary);
      background: #ffe6f0;
      padding: 3px 10px;
      border-radius: 12px;
      font-weight: 600;
    }

    /* 区域通用标题 */
    .section-padding {
      padding: 72px 0;
    }

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

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

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

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

    /* 模型矩阵徽章流 */
    .models-stream-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-soft);
      margin-bottom: 50px;
    }

    .models-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 16px;
      text-align: center;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px;
    }

    .model-tag {
      padding: 6px 14px;
      background: #fff0f5;
      border: 1px solid #ffd6e6;
      border-radius: 20px;
      font-size: 0.825rem;
      font-weight: 600;
      color: var(--text-main);
      transition: var(--transition);
    }

    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

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

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: var(--secondary);
    }

    .service-card-header {
      margin-bottom: 14px;
    }

    .service-card-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      font-weight: 800;
      margin-bottom: 14px;
    }

    .service-card-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .service-card-desc {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    .service-card-footer {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .service-link {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .service-link:hover {
      text-decoration: underline;
    }

    /* 案例图文网格 */
    .showcase-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
      gap: 24px;
    }

    .showcase-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-soft);
      transition: var(--transition);
    }

    .showcase-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
    }

    .showcase-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background-color: #fdf0f4;
      overflow: hidden;
    }

    .showcase-img-wrap.square {
      aspect-ratio: 1 / 1;
      max-height: 280px;
    }

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

    .showcase-card:hover .showcase-img-wrap img {
      transform: scale(1.03);
    }

    .showcase-body {
      padding: 20px;
    }

    .showcase-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .showcase-desc {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 对比评测表格 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--shadow-soft);
    }

    .compare-header {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border-color);
      gap: 16px;
    }

    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: #fff0f5;
      padding: 8px 18px;
      border-radius: 30px;
      border: 1px solid #ffd6e6;
    }

    .rating-stars {
      color: #ff9800;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .rating-score {
      font-weight: 800;
      color: var(--primary);
      font-size: 1.1rem;
    }

    .table-responsive {
      width: 100%;
      overflow-x: auto;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }

    .compare-table th, .compare-table td {
      padding: 16px;
      border-bottom: 1px solid #f9e2ec;
      font-size: 0.95rem;
    }

    .compare-table th {
      background: #fff7fa;
      color: var(--text-main);
      font-weight: 700;
    }

    .compare-table td.highlight {
      background: #fff1f6;
      color: var(--primary);
      font-weight: 700;
    }

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

    .flow-step-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .flow-num {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--secondary));
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 14px;
      font-weight: 800;
      font-size: 0.95rem;
    }

    .flow-title {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 客户评价网格 (6条) */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

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

    .review-content {
      font-size: 0.925rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: italic;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .reviewer-avatar-placeholder {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, #ffe0eb, #ffd1e3);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 0.95rem;
    }

    .reviewer-name {
      font-size: 0.95rem;
      font-weight: 700;
    }

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

    /* FAQ 手风琴面板 */
    .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: var(--radius-md);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item.active {
      border-color: var(--primary);
      box-shadow: 0 4px 16px rgba(230, 0, 92, 0.08);
    }

    .faq-trigger {
      width: 100%;
      text-align: left;
      padding: 18px 22px;
      background: none;
      border: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .faq-trigger:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 1.25rem;
      font-weight: 400;
      transition: transform 0.25s ease;
      color: var(--primary);
    }

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

    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fffbfe;
    }

    .faq-body {
      padding: 0 22px 20px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 资讯与百科文章 */
    .news-section-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
    }

    .news-list {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 16px;
    }

    .news-item-link {
      display: block;
      padding: 14px 18px;
      border: 1px solid #fce3ed;
      border-radius: var(--radius-sm);
      background: var(--bg-page);
      transition: var(--transition);
    }

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

    .news-tag {
      font-size: 0.75rem;
      color: var(--primary);
      font-weight: 700;
      margin-bottom: 4px;
      display: block;
    }

    .news-title {
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
    }

    /* 需求匹配与表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 36px;
      align-items: start;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-soft);
    }

    .contact-info-title {
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
    }

    .contact-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-bottom: 24px;
    }

    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 0.95rem;
    }

    .contact-label {
      font-weight: 700;
      color: var(--primary);
      min-width: 80px;
    }

    .qr-container {
      margin-top: 20px;
      padding: 16px;
      background: #fff5f8;
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px dashed #ffb3cc;
    }

    .qr-container img {
      max-width: 140px;
      height: auto;
      border-radius: var(--radius-sm);
      display: block;
      margin: 0 auto 10px;
      box-shadow: 0 4px 12px rgba(0,0,0,0.06);
    }

    .qr-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-soft);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #ebd3de;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      outline: none;
      transition: var(--transition);
      background-color: #ffffff;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(230, 0, 92, 0.12);
    }

    .form-textarea {
      resize: vertical;
      min-height: 100px;
    }

    /* 友情链接与页脚 */
    .footer-section {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      margin-top: 60px;
    }

    .footer-links-box {
      padding-bottom: 24px;
      margin-bottom: 24px;
      border-bottom: 1px solid #fae1ec;
    }

    .footer-links-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      font-size: 0.875rem;
      color: var(--text-muted);
      padding: 4px 10px;
      background: var(--bg-page);
      border-radius: var(--radius-sm);
      border: 1px solid #f7dbe6;
    }

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

    .footer-bottom {
      display: flex;
      flex-wrap: wrap;
      align-items: center;
      justify-content: space-between;
      font-size: 0.875rem;
      color: var(--text-muted);
      gap: 12px;
    }

    /* 悬浮快捷组件 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 998;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 6px 20px rgba(230, 0, 92, 0.18);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 800;
      cursor: pointer;
      transition: var(--transition);
      font-size: 0.9rem;
    }

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

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 2.1rem;
      }
      .nav-links {
        display: none;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
      }
      .nav-links.active a {
        width: 100%;
        padding: 10px 0;
      }
    }

    @media (max-width: 576px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .section-title {
        font-size: 1.6rem;
      }
    }