* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }
    :root {
      --candy-pink: #ff8a9f;
      --candy-blue: #6ec4f5;
      --candy-yellow: #ffd966;
      --candy-mint: #7dd8b0;
      --candy-purple: #b19cd9;
      --candy-orange: #ffb347;
      --bg-soft: #fef8f3;
      --text-dark: #1e2b3c;
      --text-mid: #3e4d5e;
      --card-white: #ffffff;
      --shadow-sm: 0 8px 20px rgba(0, 0, 0, 0.03);
      --shadow-md: 0 12px 32px rgba(0, 0, 0, 0.06);
      --radius-lg: 24px;
      --radius-md: 16px;
      --radius-sm: 12px;
    }
    body {
      font-family: system-ui, -apple-system, 'Segoe UI', Roboto, 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background: var(--bg-soft);
      color: var(--text-dark);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }
    /* 顶部导航 */
    .site-header {
      background: rgba(255, 255, 255, 0.85);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid rgba(0, 0, 0, 0.04);
      position: sticky;
      top: 0;
      z-index: 100;
    }
    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      min-height: 68px;
      gap: 16px;
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      flex-shrink: 0;
    }
    .brand img {
      max-width: 120px;
      height: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      flex-wrap: wrap;
    }
    .nav-links a {
      padding: 8px 12px;
      color: var(--text-mid);
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 500;
      border-radius: 30px;
      transition: background 0.2s, color 0.2s;
    }
    .nav-links a:hover {
      background: #f0f5fe;
      color: #1e4a6b;
    }
    .nav-cta {
      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: 40px;
      text-decoration: none;
      transition: all 0.25s ease;
      border: none;
      cursor: pointer;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: linear-gradient(135deg, #ff8a9f, #ffb347);
      color: #fff;
      box-shadow: 0 6px 16px rgba(255, 138, 159, 0.3);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 10px 22px rgba(255, 138, 159, 0.4);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid #cbd6e3;
      color: var(--text-dark);
    }
    .btn-outline:hover {
      background: #f0f5fe;
      border-color: #6ec4f5;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.8rem;
      cursor: pointer;
      color: var(--text-dark);
      line-height: 1;
      padding: 4px 8px;
    }
    /* 首屏 hero 无图片 */
    .hero {
      padding: 60px 0 48px;
      background: linear-gradient(145deg, #ffffff 0%, #fef4f0 40%, #e4f2fe 100%);
      position: relative;
      overflow: hidden;
    }
    .hero::before {
      content: '';
      position: absolute;
      top: -100px;
      right: -100px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(255, 138, 159, 0.15), transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -80px;
      left: -80px;
      width: 280px;
      height: 280px;
      background: radial-gradient(circle, rgba(110, 196, 245, 0.15), transparent 70%);
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-content {
      max-width: 800px;
      position: relative;
      z-index: 2;
    }
    .hero h1 {
      font-size: 3rem;
      font-weight: 800;
      line-height: 1.2;
      letter-spacing: -0.02em;
      color: var(--text-dark);
      margin-bottom: 20px;
    }
    .hero h1 span {
      background: linear-gradient(135deg, #ff8a9f, #6ec4f5);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero p {
      font-size: 1.15rem;
      color: var(--text-mid);
      max-width: 620px;
      margin-bottom: 32px;
    }
    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 24px 40px;
      border-top: 1px solid rgba(0, 0, 0, 0.06);
      padding-top: 24px;
    }
    .hero-stat-item {
      display: flex;
      flex-direction: column;
    }
    .hero-stat-item strong {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--text-dark);
    }
    .hero-stat-item span {
      font-size: 0.9rem;
      color: #6f7e8e;
    }
    .section {
      padding: 72px 0;
    }
    .section-head {
      margin-bottom: 40px;
    }
    .section-head h2 {
      font-size: 2.1rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      color: var(--text-dark);
      margin-bottom: 8px;
    }
    .section-head p {
      font-size: 1.05rem;
      color: #5e6f7e;
      max-width: 620px;
    }
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
    }
    .card {
      background: var(--card-white);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      border: 1px solid rgba(0, 0, 0, 0.02);
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .card h3 {
      font-size: 1.25rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-dark);
    }
    .card p {
      font-size: 0.95rem;
      color: #5a6b7c;
      flex: 1;
    }
    .tag {
      display: inline-block;
      padding: 4px 12px;
      background: #f0f5fe;
      border-radius: 40px;
      font-size: 0.75rem;
      font-weight: 500;
      color: #3e6e8c;
      margin-bottom: 12px;
      align-self: flex-start;
    }
    .divider {
      height: 1px;
      background: rgba(0, 0, 0, 0.06);
      margin: 32px 0;
    }
    .table-wrap {
      overflow-x: auto;
      border-radius: var(--radius-sm);
      border: 1px solid #eef2f6;
      background: #fff;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      min-width: 600px;
    }
    th {
      background: #f8fafd;
      font-weight: 600;
      text-align: left;
      padding: 16px 20px;
      font-size: 0.9rem;
      color: #2c3e50;
      border-bottom: 1px solid #e6ecf2;
    }
    td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0f4f8;
      font-size: 0.95rem;
      color: #3e4d5e;
    }
    tr:last-child td {
      border-bottom: none;
    }
    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      color: #f5b342;
      font-weight: 700;
    }
    .process-steps {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      counter-reset: step;
    }
    .step-item {
      flex: 1 1 180px;
      background: var(--card-white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: transform 0.2s;
    }
    .step-item:hover {
      transform: translateY(-3px);
    }
    .step-item::before {
      counter-increment: step;
      content: counter(step);
      display: inline-block;
      font-size: 0.9rem;
      font-weight: 700;
      color: #fff;
      background: linear-gradient(135deg, #6ec4f5, #b19cd9);
      width: 28px;
      height: 28px;
      border-radius: 50%;
      text-align: center;
      line-height: 28px;
      margin-bottom: 16px;
    }
    .step-item h4 {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 6px;
    }
    .step-item p {
      font-size: 0.9rem;
      color: #5a6b7c;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: var(--card-white);
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      overflow: hidden;
      transition: box-shadow 0.2s;
    }
    .faq-item:hover {
      box-shadow: var(--shadow-md);
    }
    .faq-question {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 20px 24px;
      font-weight: 600;
      font-size: 1rem;
      cursor: pointer;
      color: var(--text-dark);
      transition: background 0.2s;
      list-style: none;
      user-select: none;
    }
    .faq-question::-webkit-details-marker {
      display: none;
    }
    .faq-question::after {
      content: '+';
      font-size: 1.4rem;
      font-weight: 300;
      color: #8b9aab;
      transition: transform 0.3s;
      line-height: 1;
    }
    .faq-item[open] .faq-question::after {
      content: '−';
      transform: rotate(180deg);
    }
    .faq-answer {
      padding: 0 24px 20px;
      color: #5a6b7c;
      font-size: 0.95rem;
      border-top: 1px solid rgba(0, 0, 0, 0.03);
      margin-top: 0;
    }
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 24px;
    }
    .review-card {
      background: var(--card-white);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s;
      display: flex;
      flex-direction: column;
    }
    .review-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }
    .review-stars {
      color: #f5b342;
      font-size: 0.9rem;
      letter-spacing: 2px;
      margin-bottom: 12px;
    }
    .review-text {
      font-size: 0.95rem;
      color: #3e4d5e;
      font-style: italic;
      margin-bottom: 18px;
      flex: 1;
    }
    .review-user {
      font-weight: 600;
      color: var(--text-dark);
      font-size: 0.9rem;
    }
    .review-role {
      font-size: 0.8rem;
      color: #8b9aab;
    }
    .case-gallery {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
    }
    .case-item {
      flex: 1 1 240px;
      background: var(--card-white);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .case-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .case-item img {
      width: 100%;
      height: auto;
      display: block;
      aspect-ratio: 4/3;
      object-fit: cover;
    }
    .case-item p {
      padding: 16px 18px;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text-dark);
      text-align: center;
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 500;
      margin-bottom: 6px;
      color: #2c3e50;
    }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #dfe6ee;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      font-family: inherit;
      background: #fff;
      transition: border-color 0.2s, box-shadow 0.2s;
    }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      outline: none;
      border-color: #6ec4f5;
      box-shadow: 0 0 0 3px rgba(110, 196, 245, 0.15);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
    }
    .footer {
      background: #1e2b3c;
      color: #cbd6e3;
      padding: 48px 0 24px;
      margin-top: 20px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
      gap: 32px;
      margin-bottom: 32px;
    }
    .footer h4 {
      color: #ffffff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer a {
      color: #b0c4d9;
      text-decoration: none;
      font-size: 0.9rem;
      display: block;
      margin-bottom: 10px;
      transition: color 0.2s;
    }
    .footer a:hover {
      color: #ffb347;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding-top: 24px;
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      font-size: 0.85rem;
      color: #8b9aab;
    }
    .floating-chat {
      position: fixed;
      bottom: 24px;
      right: 24px;
      z-index: 200;
      display: flex;
      flex-direction: column;
      gap: 12px;
      align-items: flex-end;
    }
    .chat-bubble {
      background: #fff;
      border-radius: 50%;
      width: 56px;
      height: 56px;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
      cursor: pointer;
      transition: transform 0.25s, box-shadow 0.25s;
      border: none;
      font-size: 1.6rem;
      color: #1e2b3c;
    }
    .chat-bubble:hover {
      transform: scale(1.05);
      box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
    }
    .back-top {
      position: fixed;
      bottom: 90px;
      right: 24px;
      z-index: 199;
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: #fff;
      border: 1px solid #e0e8f0;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.06);
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      color: #1e2b3c;
      opacity: 0;
      visibility: hidden;
      transition: all 0.3s;
    }
    .back-top.show {
      opacity: 1;
      visibility: visible;
    }
    .wechat-qr {
      text-align: center;
      padding: 16px;
      background: #fff;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
    }
    .wechat-qr img {
      max-width: 140px;
      height: auto;
      display: block;
      margin: 0 auto 8px;
    }
    .wechat-qr span {
      font-size: 0.8rem;
      color: #5a6b7c;
    }
    .reveal {
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.6s ease, transform 0.6s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      margin-top: 12px;
    }
    .model-tag {
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #e6ecf2;
      border-radius: 40px;
      font-size: 0.8rem;
      color: #3e4d5e;
      transition: all 0.2s;
    }
    .model-tag:hover {
      background: #f0f5fe;
      border-color: #6ec4f5;
      transform: translateY(-2px);
    }
    @media (max-width: 900px) {
      .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        align-items: flex-start;
        background: #fff;
        padding: 12px 0;
        border-top: 1px solid #eef2f6;
      }
      .nav-links.active {
        display: flex;
      }
      .nav-wrap {
        flex-wrap: wrap;
      }
      .menu-toggle {
        display: block;
      }
      .nav-cta .btn {
        display: none;
      }
      .hero h1 {
        font-size: 2.2rem;
      }
      .hero p {
        font-size: 1rem;
      }
      .form-row {
        grid-template-columns: 1fr;
      }
    }
    @media (max-width: 600px) {
      .hero h1 {
        font-size: 1.9rem;
      }
      .section {
        padding: 48px 0;
      }
      .section-head h2 {
        font-size: 1.7rem;
      }
      .hero-stats {
        gap: 16px;
      }
      .hero-stat-item strong {
        font-size: 1.3rem;
      }
    }
    .ai-page-home-link {
      color: var(--text-mid);
      text-decoration: none;
      font-weight: 500;
    }
    .ai-page-home-link:hover {
      color: #1e4a6b;
    }
    .article-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #fff;
      padding: 16px 20px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .article-item:hover {
      transform: translateX(4px);
      box-shadow: var(--shadow-md);
    }
    .article-item a {
      color: var(--text-dark);
      text-decoration: none;
      font-weight: 500;
      font-size: 0.95rem;
      flex: 1;
    }
    .article-item a:hover {
      color: #6ec4f5;
    }
    .article-tag {
      font-size: 0.75rem;
      color: #8b9aab;
      background: #f8fafd;
      padding: 4px 12px;
      border-radius: 20px;
    }
    .timeline {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .timeline-item {
      display: flex;
      gap: 20px;
      align-items: flex-start;
    }
    .timeline-dot {
      width: 12px;
      height: 12px;
      border-radius: 50%;
      background: #6ec4f5;
      margin-top: 8px;
      flex-shrink: 0;
    }
    .timeline-content {
      background: #fff;
      padding: 20px 24px;
      border-radius: var(--radius-sm);
      box-shadow: var(--shadow-sm);
      flex: 1;
    }
    .timeline-content h4 {
      font-size: 1rem;
      margin-bottom: 4px;
    }
    .timeline-content p {
      font-size: 0.9rem;
      color: #5a6b7c;
    }