:root {
      --primary: #c2185b;
      --primary-light: #e91e63;
      --primary-dark: #880e4f;
      --accent: #f06292;
      --bg-soft: #fff0f5;
      --bg-card: #ffffff;
      --text-main: #2d2d2d;
      --text-sub: #5a5a5a;
      --border-light: #f0d0dd;
      --shadow-sm: 0 2px 12px rgba(194,24,91,0.08);
      --shadow-md: 0 8px 30px rgba(194,24,91,0.12);
      --shadow-hover: 0 12px 40px rgba(194,24,91,0.18);
      --radius: 14px;
      --radius-sm: 8px;
      --font-stack: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
      --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    }
    * { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; font-size: 16px; }
    body {
      font-family: var(--font-stack);
      color: var(--text-main);
      background: #fffafc;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { text-decoration: none; color: inherit; transition: var(--transition); }
    ul { list-style: none; }
    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    .section {
      padding: 80px 0;
      position: relative;
    }
    .section-alt { background: var(--bg-soft); }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      text-align: center;
      color: var(--primary-dark);
      margin-bottom: 12px;
      letter-spacing: 1px;
    }
    .section-sub {
      text-align: center;
      color: var(--text-sub);
      font-size: 1.05rem;
      margin-bottom: 48px;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }
    .badge {
      display: inline-block;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      font-size: 0.78rem;
      padding: 4px 14px;
      border-radius: 20px;
      font-weight: 600;
      letter-spacing: 0.5px;
      margin-bottom: 10px;
    }
    .btn {
      display: inline-block;
      padding: 12px 32px;
      border-radius: 30px;
      font-weight: 700;
      font-size: 1rem;
      cursor: pointer;
      border: none;
      transition: var(--transition);
      text-align: center;
      line-height: 1.4;
    }
    .btn-primary {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      box-shadow: 0 6px 20px rgba(194,24,91,0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 30px rgba(194,24,91,0.4);
    }
    .btn-outline {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
    }
    .btn-outline:hover {
      background: var(--primary);
      color: #fff;
      transform: translateY(-2px);
    }
    /* 导航 */
    .navbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      box-shadow: 0 1px 0 var(--border-light);
      transition: var(--transition);
    }
    .nav-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 68px;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-weight: 800;
      font-size: 1.25rem;
      color: var(--primary-dark);
    }
    .ai-page-logo { max-height: 40px; width: auto; }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }
    .nav-links a {
      padding: 8px 14px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: 6px;
      white-space: nowrap;
    }
    .nav-links a:hover {
      color: var(--primary);
      background: var(--bg-soft);
    }
    .nav-cta {
      margin-left: 8px;
      padding: 8px 20px !important;
      background: linear-gradient(135deg, var(--primary), var(--primary-light)) !important;
      color: #fff !important;
      border-radius: 20px !important;
      font-weight: 700 !important;
    }
    .nav-cta:hover {
      box-shadow: 0 6px 18px rgba(194,24,91,0.35);
      transform: translateY(-1px);
    }
    .menu-toggle {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 6px;
    }
    .menu-toggle span {
      display: block;
      width: 26px;
      height: 3px;
      border-radius: 3px;
      background: var(--primary);
      transition: var(--transition);
    }
    /* Hero */
    .hero {
      margin-top: 68px;
      min-height: 92vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, #fff5f8 0%, #ffe0eb 40%, #f8d7e4 100%);
      position: relative;
      overflow: hidden;
      padding: 80px 0;
    }
    .hero::before {
      content: '';
      position: absolute;
      width: 600px;
      height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(233,30,99,0.12) 0%, transparent 70%);
      top: -200px;
      right: -150px;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      width: 400px;
      height: 400px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(194,24,91,0.09) 0%, transparent 70%);
      bottom: -100px;
      left: -100px;
      pointer-events: none;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 60px;
      align-items: center;
      position: relative;
      z-index: 1;
    }
    .hero-content h1 {
      font-size: 2.9rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--primary-dark);
      margin-bottom: 22px;
      letter-spacing: 1px;
    }
    .hero-content h1 em {
      font-style: normal;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      -webkit-background-clip: text;
      background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-desc {
      font-size: 1.12rem;
      color: var(--text-sub);
      margin-bottom: 32px;
      max-width: 560px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }
    .hero-actions .btn-primary {
      padding: 16px 44px;
      font-size: 1.08rem;
      animation: pulseGlow 2.4s infinite;
    }
    @keyframes pulseGlow {
      0%, 100% { box-shadow: 0 6px 20px rgba(194,24,91,0.3); }
      50% { box-shadow: 0 10px 34px rgba(233,30,99,0.5); }
    }
    .hero-stats {
      display: flex;
      gap: 36px;
      flex-wrap: wrap;
    }
    .hero-stat-item {
      text-align: left;
    }
    .hero-stat-item strong {
      display: block;
      font-size: 1.9rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.2;
    }
    .hero-stat-item span {
      font-size: 0.86rem;
      color: var(--text-sub);
    }
    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }
    .hero-card {
      background: rgba(255,255,255,0.85);
      border: 1px solid rgba(233,30,99,0.15);
      border-radius: var(--radius);
      padding: 22px 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      backdrop-filter: blur(6px);
    }
    .hero-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: rgba(233,30,99,0.3);
    }
    .hero-card h4 {
      font-size: 1.02rem;
      color: var(--primary-dark);
      margin-bottom: 6px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .hero-card p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }
    .hero-card .dot {
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--primary-light);
      display: inline-block;
      flex-shrink: 0;
    }
    /* 数据指标卡片 */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .metric-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 32px 24px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .metric-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
      border-color: var(--accent);
    }
    .metric-card .num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.15;
    }
    .metric-card .num small {
      font-size: 1rem;
      font-weight: 700;
    }
    .metric-card p {
      color: var(--text-sub);
      font-size: 0.92rem;
      margin-top: 6px;
    }
    /* 服务能力卡片 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 26px;
    }
    .service-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 30px 26px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }
    .service-card::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 4px;
      background: linear-gradient(90deg, var(--primary), var(--accent));
      opacity: 0;
      transition: var(--transition);
    }
    .service-card:hover::before { opacity: 1; }
    .service-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .service-icon {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: linear-gradient(135deg, rgba(233,30,99,0.12), rgba(240,98,146,0.12));
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 18px;
    }
    .service-card h3 {
      font-size: 1.12rem;
      color: var(--primary-dark);
      margin-bottom: 10px;
    }
    .service-card p {
      font-size: 0.9rem;
      color: var(--text-sub);
    }
    /* 流程步骤 */
    .steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step {
      text-align: center;
      position: relative;
      padding: 0 8px;
    }
    .step-num {
      width: 62px;
      height: 62px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      font-weight: 900;
      font-size: 1.4rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 18px;
      box-shadow: 0 8px 20px rgba(194,24,91,0.25);
    }
    .step h4 {
      font-size: 1.05rem;
      color: var(--primary-dark);
      margin-bottom: 8px;
    }
    .step p {
      font-size: 0.88rem;
      color: var(--text-sub);
    }
    .steps::before {
      content: '';
      position: absolute;
      top: 31px;
      left: 12%;
      right: 12%;
      height: 2px;
      background: linear-gradient(90deg, var(--border-light), var(--accent), var(--border-light));
      z-index: 0;
    }
    .step { z-index: 1; }
    /* 对比表格 */
    .compare-table-wrap {
      overflow-x: auto;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      background: #fff;
    }
    table.compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 720px;
    }
    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      font-size: 0.92rem;
      border-bottom: 1px solid var(--border-light);
    }
    .compare-table thead th {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      font-weight: 700;
      font-size: 0.95rem;
    }
    .compare-table tbody tr:hover { background: #fff5f9; }
    .compare-table .highlight {
      color: var(--primary);
      font-weight: 700;
    }
    .compare-score {
      display: flex;
      align-items: center;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: center;
      margin: 0 auto 40px;
      background: linear-gradient(135deg, #fff, #fff0f6);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 24px 36px;
      max-width: 680px;
      box-shadow: var(--shadow-sm);
    }
    .compare-score .stars {
      color: #ff9800;
      font-size: 1.6rem;
      letter-spacing: 3px;
    }
    .compare-score .score-num {
      font-size: 2.6rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }
    .compare-score .score-num small {
      font-size: 1rem;
      color: var(--text-sub);
      font-weight: 500;
    }
    .compare-score p {
      font-size: 0.95rem;
      color: var(--text-sub);
    }
    /* FAQ */
    .faq-list { max-width: 880px; margin: 0 auto; }
    .faq-item {
      background: #fff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-sm);
      margin-bottom: 14px;
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-item:hover { border-color: var(--accent); }
    .faq-question {
      width: 100%;
      background: none;
      border: none;
      padding: 20px 52px 20px 24px;
      text-align: left;
      font-size: 1.02rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      position: relative;
      font-family: inherit;
      transition: var(--transition);
    }
    .faq-question::after {
      content: '+';
      position: absolute;
      right: 22px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 1.4rem;
      color: var(--primary);
      font-weight: 400;
      transition: var(--transition);
    }
    .faq-item.open .faq-question::after {
      content: '−';
      transform: translateY(-50%) rotate(180deg);
    }
    .faq-item.open .faq-question { color: var(--primary); }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease, padding 0.3s ease;
      padding: 0 24px;
      color: var(--text-sub);
      font-size: 0.93rem;
      line-height: 1.75;
    }
    .faq-item.open .faq-answer {
      max-height: 400px;
      padding: 0 24px 22px;
    }
    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: #fff;
      border-radius: var(--radius);
      padding: 28px 26px;
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .review-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
    }
    .review-stars { color: #ff9800; font-size: 1rem; letter-spacing: 2px; }
    .review-text {
      font-size: 0.92rem;
      color: var(--text-sub);
      flex: 1;
    }
    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
    }
    .review-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      flex-shrink: 0;
    }
    .review-author strong { display: block; font-size: 0.92rem; color: var(--text-main); }
    .review-author span { font-size: 0.78rem; color: var(--text-sub); }
    /* 案例展示 */
    .cases-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 28px;
    }
    .case-card {
      background: #fff;
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .case-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .case-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #fce4ec;
    }
    .case-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .case-card:hover .case-img-wrap img { transform: scale(1.05); }
    .case-body { padding: 24px 26px; }
    .case-body h3 { font-size: 1.1rem; color: var(--primary-dark); margin-bottom: 8px; }
    .case-body p { font-size: 0.9rem; color: var(--text-sub); }
    /* 文章列表 */
    .article-list {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .article-item {
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 24px;
      border: 1px solid var(--border-light);
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
    }
    .article-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .article-item h4 {
      font-size: 1rem;
      color: var(--primary-dark);
      margin-bottom: 8px;
      line-height: 1.5;
    }
    .article-item p { font-size: 0.85rem; color: var(--text-sub); }
    /* 表单 */
    .form-wrap {
      max-width: 760px;
      margin: 0 auto;
      background: #fff;
      border-radius: var(--radius);
      padding: 44px 44px 40px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-light);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 22px;
    }
    .form-group {
      margin-bottom: 22px;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }
    .form-group label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }
    .form-group label .req { color: var(--primary); }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 13px 16px;
      border: 1.5px solid var(--border-light);
      border-radius: var(--radius-sm);
      font-family: inherit;
      font-size: 0.94rem;
      transition: var(--transition);
      background: #fffafc;
      color: var(--text-main);
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: var(--primary-light);
      box-shadow: 0 0 0 3px rgba(233,30,99,0.1);
      background: #fff;
    }
    .form-group textarea { resize: vertical; min-height: 120px; }
    .form-submit {
      width: 100%;
      padding: 15px;
      font-size: 1.05rem;
      margin-top: 4px;
    }
    /* 页脚 */
    .footer {
      background: #2a0a17;
      color: #e8c8d6;
      padding: 64px 0 28px;
      margin-top: 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer h4 {
      color: #fff;
      font-size: 1.02rem;
      margin-bottom: 18px;
      font-weight: 700;
    }
    .footer p, .footer li, .footer a {
      font-size: 0.88rem;
      color: #cfa4b6;
      line-height: 2;
      transition: var(--transition);
    }
    .footer a:hover { color: #fff; }
    .footer-brand {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 14px;
    }
    .footer-brand .ai-page-logo { max-height: 36px;  }
    .footer-qr { margin-top: 14px; }
    .footer-qr img {
      width: 110px;
      height: 110px;
      object-fit: cover;
      border-radius: 8px;
      border: 2px solid rgba(255,255,255,0.1);
    }
    .footer-qr p { font-size: 0.78rem; margin-top: 6px; color: #b98ca0; }
    .footer-links-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px 18px;
    }
    .footer-links-cloud a { line-height: 1.6; }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 0.82rem;
      color: #a87489;
    }
    /* 标签云 */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      max-width: 960px;
      margin: 0 auto;
    }
    .tag-cloud span {
      background: #fff;
      border: 1px solid var(--border-light);
      color: var(--primary-dark);
      padding: 8px 18px;
      border-radius: 22px;
      font-size: 0.86rem;
      font-weight: 500;
      transition: var(--transition);
      cursor: default;
    }
    .tag-cloud span:hover {
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      border-color: transparent;
      transform: translateY(-2px);
    }
    /* 价格参考/时间线 */
    .price-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .price-card {
      background: #fff;
      border-radius: var(--radius);
      padding: 34px 28px;
      text-align: center;
      border: 1.5px solid var(--border-light);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      position: relative;
    }
    .price-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-hover);
    }
    .price-card.featured {
      border-color: var(--primary);
      box-shadow: 0 12px 34px rgba(194,24,91,0.15);
    }
    .price-card.featured::after {
      content: '推荐';
      position: absolute;
      top: -12px;
      left: 50%;
      transform: translateX(-50%);
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      font-size: 0.75rem;
      padding: 4px 16px;
      border-radius: 20px;
      font-weight: 700;
    }
    .price-card h4 { font-size: 1.1rem; color: var(--primary-dark); margin-bottom: 12px; }
    .price-card .price-amount {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--primary);
      line-height: 1.2;
    }
    .price-card .price-amount small { font-size: 0.9rem; font-weight: 500; color: var(--text-sub); }
    .price-card ul { margin: 18px 0; text-align: left; }
    .price-card li {
      font-size: 0.88rem;
      color: var(--text-sub);
      padding: 6px 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .price-card li::before {
      content: '✓';
      color: var(--primary);
      font-weight: 700;
    }
    /* 时间线 */
    .timeline {
      max-width: 820px;
      margin: 0 auto;
      position: relative;
      padding-left: 40px;
    }
    .timeline::before {
      content: '';
      position: absolute;
      left: 14px;
      top: 6px;
      bottom: 6px;
      width: 2px;
      background: linear-gradient(180deg, var(--primary), var(--accent), var(--border-light));
    }
    .timeline-item {
      position: relative;
      padding: 0 0 34px 24px;
    }
    .timeline-item::before {
      content: '';
      position: absolute;
      left: -32px;
      top: 4px;
      width: 14px;
      height: 14px;
      border-radius: 50%;
      background: var(--primary);
      border: 3px solid #fff;
      box-shadow: 0 0 0 2px var(--primary);
    }
    .timeline-item h4 { font-size: 1rem; color: var(--primary-dark); margin-bottom: 4px; }
    .timeline-item p { font-size: 0.88rem; color: var(--text-sub); }
    /* 服务网络 */
    .network-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .network-card {
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 24px 20px;
      text-align: center;
      border: 1px solid var(--border-light);
      transition: var(--transition);
    }
    .network-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--accent);
    }
    .network-card strong {
      display: block;
      color: var(--primary-dark);
      font-size: 1.02rem;
      margin-bottom: 6px;
    }
    .network-card span { font-size: 0.84rem; color: var(--text-sub); }
    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 24px;
      bottom: 28px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      align-items: flex-end;
      gap: 12px;
    }
    .float-btn {
      width: 56px;
      height: 56px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), var(--primary-light));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      cursor: pointer;
      box-shadow: 0 8px 24px rgba(194,24,91,0.35);
      transition: var(--transition);
      border: none;
    }
    .float-btn:hover {
      transform: translateY(-3px) scale(1.05);
      box-shadow: 0 12px 32px rgba(194,24,91,0.45);
    }
    .float-pop {
      position: absolute;
      right: 68px;
      bottom: 0;
      background: #fff;
      border-radius: var(--radius);
      padding: 18px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-light);
      width: 220px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(10px);
      transition: var(--transition);
    }
    .float-service:hover .float-pop {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }
    .float-pop img { width: 100%; border-radius: 8px; margin-bottom: 8px; }
    .float-pop p { font-size: 0.8rem; color: var(--text-sub); text-align: center; }
    .back-top {
      position: fixed;
      left: 24px;
      bottom: 28px;
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #fff;
      border: 1.5px solid var(--border-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      cursor: pointer;
      z-index: 998;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      opacity: 0;
      visibility: hidden;
    }
    .back-top.visible { opacity: 1; visibility: visible; }
    .back-top:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
    /* 滚动渐入 */
    .reveal {
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .hero-grid { grid-template-columns: 1fr; gap: 40px; }
      .hero-content h1 { font-size: 2.4rem; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: repeat(2, 1fr); }
      .article-list { grid-template-columns: repeat(2, 1fr); }
      .network-grid { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .metrics-grid { grid-template-columns: repeat(2, 1fr); }
      .steps { grid-template-columns: repeat(2, 1fr); gap: 40px 24px; }
      .steps::before { display: none; }
    }
    @media (max-width: 860px) {
      .nav-links {
        position: fixed;
        top: 68px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 16px 24px 24px;
        gap: 4px;
        box-shadow: 0 12px 30px rgba(194,24,91,0.1);
        transform: translateY(-120%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
        max-height: calc(100vh - 68px);
        overflow-y: auto;
      }
      .nav-links.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
      }
      .nav-links a { padding: 12px 14px; }
      .nav-cta { margin-left: 0; text-align: center; margin-top: 8px; }
      .menu-toggle { display: flex; }
      .cases-grid { grid-template-columns: 1fr; }
      .price-grid { grid-template-columns: 1fr; }
      .form-wrap { padding: 30px 24px; }
      .form-row { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .section { padding: 56px 0; }
      .section-title { font-size: 1.55rem; }
      .hero-content h1 { font-size: 1.95rem; }
      .hero-desc { font-size: 1rem; }
      .hero-actions .btn-primary { padding: 14px 32px; font-size: 1rem; width: 100%; }
      .hero-stats { gap: 24px; }
      .hero-stat-item strong { font-size: 1.5rem; }
      .services-grid, .reviews-grid, .article-list, .network-grid, .metrics-grid, .steps {
        grid-template-columns: 1fr;
      }
      .footer-grid { grid-template-columns: 1fr; gap: 28px; }
      .compare-score { padding: 20px; }
      .float-service { right: 16px; bottom: 20px; }
      .back-top { left: 16px; bottom: 20px; }
      .container { padding: 0 18px; }
      .hero { min-height: auto; padding: 56px 0; }
    }