:root {
      --primary: #E11D48;
      --primary-hover: #BE123C;
      --primary-light: #FFE4E6;
      --primary-soft: #FFF1F2;
      --accent: #FF2E93;
      --accent-glow: rgba(225, 29, 72, 0.15);
      --text-main: #0F172A;
      --text-sub: #334155;
      --text-muted: #64748B;
      --bg-page: #FFF5F7;
      --bg-card: #FFFFFF;
      --border-color: #FECDD3;
      --shadow-sm: 0 4px 12px rgba(225, 29, 72, 0.06);
      --shadow-md: 0 10px 25px rgba(225, 29, 72, 0.1);
      --shadow-lg: 0 18px 36px rgba(225, 29, 72, 0.14);
      --radius: 12px;
      --container-max: 1200px;
    }

    * {
      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, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

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

    /* 布局容器规范 */
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* 顶部导航 */
    .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);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-box {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .logo-wrapper {
      max-height: 42px;
      display: flex;
      align-items: center;
    }
    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }
    .nav-item {
      position: relative;
    }
    .nav-link {
      display: inline-block;
      padding: 8px 14px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-sub);
      border-radius: 6px;
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn-header-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 8px 18px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #FFFFFF !important;
      font-size: 14px;
      font-weight: 700;
      border-radius: 20px;
      box-shadow: 0 4px 12px rgba(225, 29, 72, 0.25);
    }
    .btn-header-primary:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(225, 29, 72, 0.35);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: 1px solid var(--border-color);
      padding: 6px 10px;
      border-radius: 6px;
      cursor: pointer;
      color: var(--primary);
      font-size: 20px;
    }

    /* 区域统一标准 */
    .section-wrap {
      padding: 70px 0;
      position: relative;
    }
    .section-alt {
      background-color: #FFFFFF;
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 45px auto;
    }
    .section-tag {
      display: inline-block;
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 12px;
      border-radius: 20px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }
    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* 首屏 Hero (严格无图片) */
    .hero-section {
      padding: 80px 0 70px 0;
      background: radial-gradient(circle at 50% 20%, #FFE4E6 0%, #FFF5F7 60%, #FFFFFF 100%);
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .hero-badge-wrap {
      margin-bottom: 20px;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 6px 18px;
      border-radius: 30px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      box-shadow: var(--shadow-sm);
    }
    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }
    .hero-subtitle {
      font-size: 18px;
      color: var(--text-sub);
      max-width: 820px;
      margin: 0 auto 35px auto;
      line-height: 1.7;
      font-weight: 400;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 45px;
    }
    .btn-main-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 34px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #FFFFFF !important;
      font-size: 16px;
      font-weight: 800;
      border-radius: 30px;
      box-shadow: 0 10px 25px rgba(225, 29, 72, 0.3);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .btn-main-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 32px rgba(225, 29, 72, 0.4);
    }
    .btn-main-outline {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 14px 30px;
      background: #FFFFFF;
      color: var(--primary) !important;
      font-size: 16px;
      font-weight: 700;
      border-radius: 30px;
      border: 2px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s;
    }
    .btn-main-outline:hover {
      background: var(--primary-soft);
      border-color: var(--primary);
    }

    /* 纯 CSS 首屏数据指标卡 */
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      max-width: 960px;
      margin: 0 auto;
    }
    .stat-card-css {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px 15px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .stat-card-css:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .stat-num {
      font-size: 28px;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 4px;
    }
    .stat-text {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-sub);
    }

    /* 卡片与网格体系 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }

    .service-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--primary);
    }
    .card-icon-badge {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 18px;
    }
    .card-title {
      font-size: 18px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-desc {
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.65;
      flex: 1;
    }

    /* 模型标签云 */
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 25px;
    }
    .model-tag {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 700;
      color: var(--text-sub);
      box-shadow: var(--shadow-sm);
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: var(--primary);
      color: #FFFFFF;
      border-color: var(--primary);
      transform: scale(1.05);
    }

    /* 流程步骤 */
    .step-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-number {
      font-size: 24px;
      font-weight: 900;
      color: var(--primary);
      opacity: 0.8;
      margin-bottom: 8px;
    }
    .step-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-desc {
      font-size: 13px;
      color: var(--text-sub);
      line-height: 1.6;
    }

    /* 对比评测表格与卡片 */
    .rating-header-card {
      background: linear-gradient(135deg, #FFF1F2 0%, #FFE4E6 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 30px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }
    .rating-score-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .rating-big-num {
      font-size: 46px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }
    .rating-stars {
      color: #F59E0B;
      font-size: 20px;
      margin-bottom: 4px;
    }
    .rating-status {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }
    .compare-table-wrapper {
      overflow-x: auto;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 650px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #FFE4E6;
      font-size: 14px;
    }
    .compare-table th {
      background: #FFF1F2;
      color: var(--text-main);
      font-weight: 700;
    }
    .compare-table td.highlight {
      color: var(--primary);
      font-weight: 700;
      background: #FFFDFC;
    }

    /* 案例中心展示图 */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .gallery-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .gallery-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .gallery-img-wrap {
      background: #F1F5F9;
      aspect-ratio: 16 / 9;
      overflow: hidden;
    }
    .gallery-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.35s ease;
    }
    .gallery-item:hover img {
      transform: scale(1.03);
    }
    .gallery-info {
      padding: 18px 20px;
    }
    .gallery-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .gallery-desc {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* 用户评论卡片 */
    .testimonial-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;
    }
    .testi-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .testi-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      font-size: 16px;
    }
    .testi-user-name {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
    }
    .testi-user-role {
      font-size: 12px;
      color: var(--text-muted);
    }
    .testi-content {
      font-size: 13.5px;
      color: var(--text-sub);
      line-height: 1.65;
    }

    /* FAQ 手风琴 */
    .faq-container {
      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;
      box-shadow: var(--shadow-sm);
    }
    .faq-question {
      padding: 18px 22px;
      font-size: 15.5px;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
      background: #FFFFFF;
      transition: background 0.2s;
    }
    .faq-question:hover {
      background: var(--primary-soft);
      color: var(--primary);
    }
    .faq-icon {
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.25s;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background: #FFFDFD;
    }
    .faq-answer-inner {
      padding: 0 22px 18px 22px;
      font-size: 14px;
      color: var(--text-sub);
      line-height: 1.7;
    }

    /* 需求匹配与表单 */
    .form-box {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      font-size: 14px;
      color: var(--text-main);
      border: 1px solid #CBD5E1;
      border-radius: 8px;
      background: #F8FAFC;
      transition: all 0.2s;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px var(--accent-glow);
    }
    .form-submit-btn {
      width: 100%;
      padding: 14px;
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #FFFFFF;
      font-size: 16px;
      font-weight: 800;
      border: none;
      border-radius: 8px;
      cursor: pointer;
      box-shadow: 0 6px 18px rgba(225, 29, 72, 0.25);
      transition: all 0.25s;
    }
    .form-submit-btn:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 24px rgba(225, 29, 72, 0.35);
    }

    /* 资讯与友情链接 */
    .news-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .news-item-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 14px;
      transition: all 0.2s;
    }
    .news-item-card:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }
    .news-title {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
    }
    .news-link-btn {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      white-space: nowrap;
    }

    /* 底部专属 Footer */
    .footer {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px 0;
      color: var(--text-sub);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col-title {
      font-size: 16px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links-list a {
      font-size: 14px;
      color: var(--text-sub);
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .footer-contact-item {
      font-size: 14px;
      margin-bottom: 8px;
      color: var(--text-sub);
    }
    .footer-contact-item strong {
      color: var(--text-main);
    }
    .friend-links-area {
      border-top: 1px solid #FFE4E6;
      padding-top: 24px;
      margin-bottom: 24px;
    }
    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }
    .friend-links-flex a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .friend-links-flex a:hover {
      color: var(--primary);
    }
    .footer-bottom-bar {
      border-top: 1px solid #FFE4E6;
      padding-top: 20px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 悬浮客服面板 */
    .float-kefu {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 999;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      padding: 10px 18px;
      box-shadow: var(--shadow-lg);
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      font-weight: 700;
      color: var(--primary);
      cursor: pointer;
      transition: all 0.25s;
    }
    .float-kefu:hover {
      transform: translateY(-3px);
      background: var(--primary);
      color: #FFFFFF;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .grid-4, .step-grid, .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #FFFFFF;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .hero-title {
        font-size: 30px;
      }
      .grid-2, .grid-3, .grid-4, .step-grid, .gallery-grid, .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .form-box {
        padding: 24px 18px;
      }
    }