* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
      font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    }

    body {
      background: #f8fafc;
      color: #0b1e33;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    :root {
      --primary: #1e6df2;
      --primary-light: #eef4ff;
      --accent: #8b5cf6;
      --accent-soft: #f3e8ff;
      --gradient-start: #1e6df2;
      --gradient-end: #a855f7;
      --gradient-soft: #e0f2fe;
      --text-dark: #0b1e33;
      --text-muted: #4a5b6e;
      --card-bg: #ffffff;
      --border-light: #e2e8f0;
      --shadow-sm: 0 8px 20px -6px rgba(0, 20, 60, 0.08);
      --shadow-md: 0 20px 35px -8px rgba(0, 40, 100, 0.12);
      --radius-card: 24px;
      --radius-btn: 40px;
      --container-max: 1280px;
      --container-pad: 24px;
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 var(--container-pad);
    }

    /* 全局背景渐变氛围 */
    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      bottom: 0;
      background: radial-gradient(circle at 10% 20%, rgba(30, 109, 242, 0.06) 0%, transparent 45%),
                  radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.06) 0%, transparent 50%),
                  #f8fafc;
      pointer-events: none;
      z-index: -1;
    }

    /* 导航 */
    header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.6);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 12px 0;
      flex-wrap: wrap;
      gap: 10px;
    }

    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      color: var(--text-dark);
      font-weight: 700;
      font-size: 1.2rem;
      letter-spacing: -0.02em;
    }

    .brand img {
      height: 36px;
      width: auto;
    }

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

    .nav-links li {
      margin: 0;
    }

    .nav-links a {
      display: inline-block;
      padding: 8px 12px;
      text-decoration: none;
      color: #2d3a4a;
      font-size: 0.92rem;
      font-weight: 500;
      border-radius: 40px;
      transition: all 0.2s ease;
      white-space: nowrap;
    }

    .nav-links a:hover {
      background: var(--primary-light);
      color: var(--primary);
    }

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 24px;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 0.92rem;
      text-decoration: none;
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
      line-height: 1.4;
      white-space: nowrap;
    }

    .btn-primary {
      background: linear-gradient(105deg, var(--gradient-start), var(--gradient-end));
      color: #fff;
      box-shadow: 0 6px 18px -4px rgba(30, 109, 242, 0.4);
    }

    .btn-primary:hover {
      box-shadow: 0 12px 24px -6px rgba(30, 109, 242, 0.5);
      transform: translateY(-2px);
    }

    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 1.5px solid var(--primary);
    }

    .btn-outline:hover {
      background: var(--primary-light);
      transform: translateY(-2px);
    }

    .btn-soft {
      background: #fff;
      color: var(--text-dark);
      box-shadow: var(--shadow-sm);
    }

    .btn-soft:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: 1px solid var(--border-light);
      border-radius: 10px;
      padding: 8px 12px;
      font-size: 1.2rem;
      cursor: pointer;
      color: var(--text-dark);
    }

    /* 首屏 Hero 无图片 */
    .hero {
      position: relative;
      padding: 70px 0 60px;
      overflow: hidden;
    }

    .hero-bg {
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 20% 40%, rgba(30, 109, 242, 0.08), transparent 55%),
                  radial-gradient(ellipse at 80% 60%, rgba(168, 85, 247, 0.1), transparent 60%);
      pointer-events: none;
    }

    .hero-content {
      position: relative;
      max-width: 820px;
      margin: 0 auto;
      text-align: center;
    }

    .hero h1 {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 24px;
      background: linear-gradient(105deg, #0b1e33 30%, #1e3a8a 70%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero p {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 650px;
      margin: 0 auto 32px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px;
      margin-bottom: 48px;
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 16px 32px;
      border-top: 1px solid rgba(30, 109, 242, 0.15);
      padding-top: 32px;
      margin-top: 8px;
    }

    .hero-stat-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.9rem;
      color: #2d3a4a;
      font-weight: 500;
    }

    .hero-stat-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
      display: inline-block;
    }

    /* 通用区块 */
    section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.8rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      color: var(--primary);
      background: var(--primary-light);
      padding: 4px 16px;
      border-radius: 40px;
      margin-bottom: 12px;
    }

    .section-header h2 {
      font-size: 2rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 12px;
    }

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

    /* 卡片网格 */
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .card {
      background: var(--card-bg);
      border-radius: var(--radius-card);
      padding: 24px 20px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(226, 232, 240, 0.5);
      transition: all 0.25s ease;
    }

    .card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
      border-color: rgba(30, 109, 242, 0.2);
    }

    .card-icon {
      font-size: 1.8rem;
      margin-bottom: 16px;
      line-height: 1;
    }

    .card h3 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* 数据指标卡片 */
    .metric-card {
      background: #fff;
      border-radius: 20px;
      padding: 24px 16px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(226, 232, 240, 0.6);
    }

    .metric-number {
      font-size: 2rem;
      font-weight: 800;
      background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 4px;
    }

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

    /* 流程步骤 */
    .steps {
      display: flex;
      flex-direction: column;
      gap: 16px;
      max-width: 720px;
      margin: 0 auto;
    }

    .step-item {
      display: flex;
      gap: 20px;
      align-items: flex-start;
      background: #fff;
      padding: 20px 24px;
      border-radius: 20px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(226, 232, 240, 0.5);
    }

    .step-num {
      flex-shrink: 0;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }

    .step-content h3 {
      font-size: 1.05rem;
      margin-bottom: 4px;
    }

    .step-content p {
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    /* 表格 */
    .table-wrap {
      overflow-x: auto;
      border-radius: 20px;
      background: #fff;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
    }

    table {
      width: 100%;
      border-collapse: collapse;
      font-size: 0.9rem;
      min-width: 600px;
    }

    th {
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      padding: 16px 18px;
      text-align: left;
      white-space: nowrap;
    }

    td {
      padding: 14px 18px;
      border-top: 1px solid var(--border-light);
      color: var(--text-muted);
    }

    tr:hover td {
      background: #fafcff;
    }

    /* 星级评分块 */
    .rating-block {
      display: flex;
      align-items: center;
      gap: 16px;
      background: #fff;
      border-radius: 20px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
      flex-wrap: wrap;
    }

    .rating-stars {
      font-size: 1.6rem;
      letter-spacing: 2px;
      color: #fbbf24;
    }

    .rating-score {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary);
    }

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

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #fff;
      border-radius: 16px;
      border: 1px solid var(--border-light);
      overflow: hidden;
      transition: box-shadow 0.2s;
    }

    .faq-item:hover {
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      font-size: 0.98rem;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      font-weight: 400;
      color: var(--primary);
      transition: transform 0.2s;
    }

    .faq-item.active .faq-question::after {
      content: "−";
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: var(--text-muted);
      font-size: 0.9rem;
      transition: max-height 0.3s ease, padding 0.2s;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 24px 20px;
    }

    /* 评论卡片 */
    .review-card {
      background: #fff;
      border-radius: 24px;
      padding: 24px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(226, 232, 240, 0.6);
      transition: all 0.25s;
    }

    .review-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }

    .review-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: linear-gradient(135deg, #e0f2fe, #ede9fe);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 1.1rem;
    }

    .review-user-info strong {
      display: block;
      font-size: 0.95rem;
    }

    .review-user-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    .review-stars {
      color: #fbbf24;
      font-size: 0.9rem;
      letter-spacing: 2px;
      margin-bottom: 8px;
    }

    .review-text {
      font-size: 0.9rem;
      color: #334155;
      line-height: 1.6;
    }

    /* 文章列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }

    .article-item {
      background: #fff;
      border-radius: 16px;
      padding: 18px 20px;
      border: 1px solid var(--border-light);
      transition: all 0.2s;
    }

    .article-item:hover {
      border-color: var(--primary);
      background: #fafcff;
    }

    .article-item a {
      text-decoration: none;
      color: var(--text-dark);
      font-weight: 600;
      font-size: 0.95rem;
      display: block;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    /* 表单 */
    .form-card {
      background: #fff;
      border-radius: 24px;
      padding: 32px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      max-width: 720px;
      margin: 0 auto;
    }

    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-bottom: 16px;
    }

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

    .form-group label {
      font-size: 0.85rem;
      font-weight: 600;
      color: #2d3a4a;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
      padding: 12px 16px;
      border-radius: 12px;
      border: 1px solid var(--border-light);
      background: #fafcff;
      font-size: 0.95rem;
      transition: border 0.2s;
      outline: none;
      font-family: inherit;
    }

    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(30, 109, 242, 0.1);
    }

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

    .form-actions {
      margin-top: 20px;
    }

    .form-actions button {
      width: 100%;
      padding: 14px;
      font-size: 1rem;
    }

    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .tag-item {
      background: #fff;
      border: 1px solid var(--border-light);
      padding: 8px 18px;
      border-radius: 40px;
      font-size: 0.85rem;
      color: var(--text-muted);
      transition: all 0.2s;
    }

    .tag-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
    }

    /* 价格参考/时间线/服务网络 精简卡片 */
    .info-banner {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      background: #fff;
      border-radius: 24px;
      padding: 32px 36px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
    }

    .info-banner > div {
      flex: 1 1 180px;
    }

    .info-banner h4 {
      font-size: 0.9rem;
      color: var(--text-muted);
      margin-bottom: 8px;
      font-weight: 600;
    }

    .info-banner p {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text-dark);
    }

    /* 友情链接 & 底部 */
    footer {
      background: #fff;
      border-top: 1px solid var(--border-light);
      padding: 40px 0 24px;
      color: var(--text-dark);
    }

    .footer-inner {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
      justify-content: space-between;
      margin-bottom: 32px;
    }

    .footer-col h4 {
      font-size: 0.9rem;
      margin-bottom: 16px;
      color: #0b1e33;
      font-weight: 700;
    }

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

    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      color: var(--text-muted);
      font-size: 0.8rem;
    }

    .footer-bottom a {
      color: var(--text-muted);
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: var(--primary);
    }

    /* 浮动客服 */
    .float-contact {
      position: fixed;
      right: 20px;
      bottom: 80px;
      z-index: 90;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 50px;
      height: 50px;
      border-radius: 50%;
      background: #fff;
      box-shadow: 0 6px 18px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      border: 1px solid var(--border-light);
      transition: all 0.2s;
      color: var(--text-dark);
      text-decoration: none;
    }

    .float-btn:hover {
      box-shadow: 0 10px 24px rgba(0, 0, 0, 0.15);
      transform: translateY(-3px);
    }

    .back-top {
      position: fixed;
      right: 20px;
      bottom: 20px;
      z-index: 90;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid var(--border-light);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      color: var(--text-muted);
      font-size: 1.2rem;
      transition: all 0.2s;
    }

    .back-top:hover {
      color: var(--primary);
      transform: translateY(-3px);
    }

    /* 动画 */
    .fade-up {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }

    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* 响应式 */
    @media (max-width: 1024px) {
      .grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        padding: 12px 0;
      }
      .nav-links.open {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .nav-wrap {
        gap: 0;
      }
      .nav-cta {
        margin-left: auto;
      }
      .hero h1 {
        font-size: 2rem;
      }
      .grid-4,
      .grid-3,
      .grid-2 {
        grid-template-columns: 1fr;
      }
      .article-list {
        grid-template-columns: 1fr;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
      .section-header h2 {
        font-size: 1.6rem;
      }
      .hero-stats {
        gap: 12px 20px;
      }
      .rating-block {
        flex-direction: column;
        align-items: flex-start;
      }
    }

    @media (max-width: 480px) {
      .container {
        padding: 0 16px;
      }
      section {
        padding: 48px 0;
      }
      .hero {
        padding: 48px 0 40px;
      }
      .hero h1 {
        font-size: 1.7rem;
      }
      .btn {
        padding: 9px 18px;
        font-size: 0.85rem;
      }
    }