:root {
      --primary-color: #ff5500;
      --primary-hover: #e04800;
      --primary-light: #fff3ed;
      --accent-color: #ff8c00;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --bg-page: #faf9f6;
      --bg-card: #ffffff;
      --border-color: #f1ede7;
      --container-max: 1200px;
      --shadow-sm: 0 4px 12px rgba(255, 85, 0, 0.05);
      --shadow-hover: 0 12px 28px rgba(255, 85, 0, 0.12);
      --radius-base: 12px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }
    html {
      scroll-behavior: smooth;
    }
    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 {
      text-decoration: none;
      color: inherit;
      transition: color 0.25s ease;
    }
    img {
      max-width: 100%;
      height: auto;
      display: block;
    }
    .container {
      width: 100%;
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }
    .header {
      position: sticky;
      top: 0;
      z-index: 100;
      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: 76px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .ai-page-logo {
      height: 42px;
      width: auto;
    }
    .brand-text {
      display: flex;
      flex-direction: column;
    }
    .brand-title {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--text-main);
      letter-spacing: -0.5px;
    }
    .brand-tagline {
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: 6px;
      transition: all 0.2s ease;
    }
    .nav-links li a:hover {
      color: var(--primary-color);
      background-color: var(--primary-light);
    }
    .nav-btn-group {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 20px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      white-space: nowrap;
    }
    .btn-primary {
      background-color: var(--primary-color);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(255, 85, 0, 0.28);
    }
    .btn-primary:hover {
      background-color: var(--primary-hover);
      color: #ffffff;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(255, 85, 0, 0.38);
    }
    .btn-outline {
      border-color: var(--primary-color);
      color: var(--primary-color);
      background-color: transparent;
    }
    .btn-outline:hover {
      background-color: var(--primary-light);
    }
    .btn-lg {
      padding: 14px 32px;
      font-size: 1.05rem;
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }
    .hero-section {
      padding: 88px 0 68px;
      background: radial-gradient(circle at 80% 20%, rgba(255, 140, 0, 0.12) 0%, rgba(255, 85, 0, 0.03) 60%, transparent 100%);
      border-bottom: 1px solid var(--border-color);
      position: relative;
    }
    .hero-content {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      max-width: 860px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: var(--primary-light);
      border: 1px solid rgba(255, 85, 0, 0.2);
      border-radius: 999px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary-color);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.85rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      letter-spacing: -1px;
      margin-bottom: 24px;
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
    }
    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
      justify-content: center;
      margin-bottom: 52px;
    }
    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 10px;
    }
    .stat-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 24px 16px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: transform 0.25s ease;
    }
    .stat-card:hover {
      transform: translateY(-4px);
    }
    .stat-num {
      font-size: 2rem;
      font-weight: 800;
      color: var(--primary-color);
      margin-bottom: 4px;
    }
    .stat-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .section-wrap {
      padding: 80px 0;
      border-bottom: 1px solid var(--border-color);
    }
    .section-head {
      text-align: center;
      max-width: 680px;
      margin: 0 auto 48px;
    }
    .section-subtitle {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-color);
      text-transform: uppercase;
      letter-spacing: 1.5px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: #0f172a;
      letter-spacing: -0.5px;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }
    .matrix-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      max-width: 960px;
      margin: 0 auto 40px;
    }
    .matrix-chip {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 8px 16px;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
    }
    .matrix-chip.hot {
      border-color: rgba(255, 85, 0, 0.35);
      background: var(--primary-light);
      color: var(--primary-color);
    }
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 30px 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: all 0.3s ease;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(255, 85, 0, 0.4);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary-color);
      font-size: 1.25rem;
      font-weight: bold;
    }
    .service-name {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 12px;
      color: #0f172a;
    }
    .service-detail {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
    }
    .service-tag {
      font-size: 0.75rem;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      color: #475569;
      padding: 4px 10px;
      border-radius: 4px;
      align-self: flex-start;
      font-weight: 500;
    }
    .banner-visual-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 36px;
    }
    .visual-box {
      border-radius: var(--radius-base);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #fff;
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .process-step {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      padding: 28px 20px;
      border-radius: var(--radius-base);
      box-shadow: var(--shadow-sm);
      text-align: center;
    }
    .step-badge {
      width: 36px;
      height: 36px;
      background: var(--primary-color);
      color: #fff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin: 0 auto 16px;
    }
    .step-title {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
    }
    .step-text {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: var(--bg-card);
      border-radius: var(--radius-base);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }
    .custom-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: #334155;
    }
    .highlight-col {
      background-color: var(--primary-light);
      font-weight: 600;
      color: var(--primary-color);
    }
    .rating-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: #fff;
      border: 1px solid rgba(255, 85, 0, 0.3);
      padding: 4px 10px;
      border-radius: 20px;
      font-weight: 700;
      font-size: 0.85rem;
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .review-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 14px;
    }
    .avatar-char {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-color);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1.1rem;
    }
    .reviewer-name {
      font-weight: 700;
      font-size: 1rem;
    }
    .reviewer-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .review-quote {
      font-size: 0.92rem;
      color: #334155;
      line-height: 1.6;
    }
    .faq-container {
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 8px;
      margin-bottom: 12px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      font-size: 1.02rem;
      user-select: none;
    }
    .faq-header:hover {
      color: var(--primary-color);
    }
    .faq-icon {
      font-size: 1.25rem;
      transition: transform 0.25s ease;
      color: var(--primary-color);
    }
    .faq-body {
      display: none;
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .faq-item.active .faq-body {
      display: block;
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: start;
    }
    .form-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 6px;
      color: #334155;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #cbd5e1;
      border-radius: 6px;
      font-size: 0.95rem;
      outline: none;
      transition: border 0.2s ease;
      background: #fff;
    }
    .form-control:focus {
      border-color: var(--primary-color);
      box-shadow: 0 0 0 3px rgba(255, 85, 0, 0.12);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .info-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-base);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .info-item {
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .info-label {
      font-weight: 700;
      min-width: 80px;
      color: #334155;
      font-size: 0.95rem;
    }
    .info-val {
      color: var(--text-muted);
      font-size: 0.95rem;
      word-break: break-all;
    }
    .qr-box {
      width: 130px;
      height: 130px;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      background: #fff;
      padding: 6px;
    }
    .footer {
      background: #0f172a;
      color: #94a3b8;
      padding: 60px 0 30px;
      font-size: 0.9rem;
      border-top: 1px solid #1e293b;
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a:hover {
      color: var(--primary-color);
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }
    .friend-links-wrap a {
      color: #94a3b8;
    }
    .friend-links-wrap a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      padding-top: 24px;
      text-align: center;
      font-size: 0.82rem;
    }
    .float-panel {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 99;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      cursor: pointer;
      color: var(--primary-color);
      font-weight: 700;
      transition: all 0.25s ease;
    }
    .float-btn:hover {
      background: var(--primary-color);
      color: #ffffff;
      transform: scale(1.08);
    }
    @media (max-width: 992px) {
      .services-grid, .reviews-grid, .banner-visual-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-layout, .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 24px;
        box-shadow: var(--shadow-hover);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
        margin-bottom: 16px;
      }
      .nav-btn-group {
        margin-left: 0;
        flex-direction: column;
        align-items: stretch;
      }
    }
    @media (max-width: 640px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .services-grid, .reviews-grid, .banner-visual-grid, .process-timeline {
        grid-template-columns: 1fr;
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
    }