:root {
      --primary: #059669;
      --primary-light: #10b981;
      --primary-soft: #ecfdf5;
      --primary-border: #a7f3d0;
      --primary-dark: #047857;
      --accent: #0284c7;
      --accent-soft: #f0f9ff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --text-light: #64748b;
      --bg-page: #f8fafc;
      --bg-card: #ffffff;
      --border-color: #e2e8f0;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background: radial-gradient(circle at 10% 0%, #ecfdf5 0%, #f8fafc 40%, #f0fdf4 100%);
      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;
    }

    .container {
      width: 100%;
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      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-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-area .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .brand-name {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

    .nav-menu {
      display: flex;
      align-items: center;
    }

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

    .nav-links li a {
      display: inline-block;
      padding: 8px 12px;
      font-size: 0.93rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover,
    .nav-links li a.active {
      color: var(--primary-dark);
      background-color: var(--primary-soft);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 0.95rem;
      font-weight: 600;
      padding: 10px 20px;
      border-radius: var(--radius-md);
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary-light), var(--primary));
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(16, 185, 129, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--primary), var(--primary-dark));
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(16, 185, 129, 0.35);
      color: #ffffff;
    }

    .btn-secondary {
      background-color: var(--primary-soft);
      color: var(--primary-dark);
      border-color: var(--primary-border);
    }

    .btn-secondary:hover {
      background-color: #d1fae5;
      color: var(--primary-dark);
    }

    .btn-outline {
      background-color: #ffffff;
      color: var(--text-main);
      border-color: var(--border-color);
    }

    .btn-outline:hover {
      border-color: var(--primary);
      color: var(--primary);
    }

    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      color: var(--text-main);
      cursor: pointer;
      padding: 4px;
    }

    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      background: linear-gradient(180deg, rgba(236, 253, 245, 0.8) 0%, rgba(248, 250, 252, 0.95) 100%);
      border-bottom: 1px solid var(--border-color);
      text-align: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      border-radius: var(--radius-full);
      background-color: #ffffff;
      border: 1px solid var(--primary-border);
      color: var(--primary-dark);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.25);
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: #064e3b;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      max-width: 840px;
      margin: 0 auto 36px;
      line-height: 1.7;
    }

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

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      max-width: 980px;
      margin: 0 auto;
    }

    .hero-stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 16px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, border-color 0.25s ease;
    }

    .hero-stat-card:hover {
      transform: translateY(-3px);
      border-color: var(--primary-border);
    }

    .stat-number {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .section-wrap {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-block;
      font-size: 0.82rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      color: var(--primary);
      background-color: var(--primary-soft);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      margin-bottom: 12px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: #0f291e;
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .card-grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }

    .service-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: var(--primary-border);
    }

    .service-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-md);
      background: var(--primary-soft);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.3rem;
      font-weight: bold;
      margin-bottom: 18px;
      border: 1px solid var(--primary-border);
    }

    .service-card-title {
      font-size: 1.18rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
      margin-bottom: 16px;
    }

    .service-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .tag-item {
      font-size: 0.78rem;
      padding: 2px 8px;
      border-radius: 4px;
      background-color: #f1f5f9;
      color: var(--text-muted);
    }

    .model-chips-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      margin-bottom: 36px;
      box-shadow: var(--shadow-sm);
    }

    .model-chip-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .model-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .model-chip {
      background: #f8fafc;
      border: 1px solid var(--border-color);
      padding: 6px 14px;
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-muted);
      transition: all 0.2s ease;
    }

    .model-chip:hover {
      background: var(--primary-soft);
      border-color: var(--primary);
      color: var(--primary-dark);
    }

    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }

    .step-number {
      font-size: 1.75rem;
      font-weight: 900;
      color: var(--primary-light);
      margin-bottom: 8px;
      line-height: 1;
    }

    .step-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .review-score-banner {
      background: linear-gradient(135deg, #064e3b 0%, #065f46 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 32px 36px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }

    .score-left {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .score-big {
      font-size: 3.5rem;
      font-weight: 900;
      line-height: 1;
      color: #34d399;
    }

    .score-text-area h3 {
      font-size: 1.4rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .score-stars {
      color: #fbbf24;
      font-size: 1.2rem;
      letter-spacing: 2px;
    }

    .table-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow-x: auto;
      box-shadow: var(--shadow-sm);
      margin-bottom: 36px;
    }

    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.92rem;
    }

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .custom-table th {
      background-color: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }

    .custom-table tr:last-child td {
      border-bottom: none;
    }

    .custom-table .highlight-col {
      background-color: #f0fdf4;
      font-weight: 600;
      color: var(--primary-dark);
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
      margin-bottom: 24px;
    }

    .gallery-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .gallery-item img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      max-height: 320px;
    }

    .gallery-meta {
      padding: 16px 20px;
    }

    .gallery-meta h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 4px;
    }

    .gallery-meta p {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .banner-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 20px;
    }

    .banner-box {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #ffffff;
    }

    .banner-box img {
      width: 100%;
      height: 140px;
      object-fit: cover;
    }

    .faq-accordion {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      transition: border-color 0.25s ease;
    }

    .faq-item.active {
      border-color: var(--primary-border);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      padding: 18px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      user-select: none;
    }

    .faq-icon {
      font-size: 1.2rem;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s cubic-bezier(0, 1, 0, 1);
      padding: 0 20px;
      color: var(--text-muted);
      font-size: 0.92rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-answer {
      max-height: 500px;
      padding-bottom: 18px;
    }

    .comment-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .comment-quote {
      font-size: 0.93rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      position: relative;
    }

    .comment-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f1f5f9;
      padding-top: 16px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      border: 1px solid var(--primary-border);
    }

    .author-info h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-info p {
      font-size: 0.82rem;
      color: var(--text-light);
    }

    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 680px;
      margin: 0 auto;
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #f8fafc;
      transition: border-color 0.2s ease;
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #ffffff;
    }

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

    .articles-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-bottom: 24px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: transform 0.25s ease;
    }

    .article-item:hover {
      transform: translateY(-2px);
      border-color: var(--primary-border);
    }

    .article-item h4 {
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .article-link {
      font-size: 0.85rem;
      color: var(--primary);
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    .contact-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: center;
    }

    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 20px;
    }

    .contact-icon {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-md);
      background: var(--primary-soft);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      flex-shrink: 0;
    }

    .contact-detail h4 {
      font-size: 0.95rem;
      font-weight: 700;
      margin-bottom: 2px;
    }

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

    .qr-card {
      text-align: center;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--shadow-sm);
    }

    .qr-card img {
      max-width: 170px;
      margin: 0 auto 12px;
      border-radius: var(--radius-md);
      border: 1px solid #f1f5f9;
    }

    .friend-links-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 24px;
      margin-top: 36px;
    }

    .friend-links-title {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .friend-links-list a {
      font-size: 0.88rem;
      color: var(--text-muted);
      background-color: #f8fafc;
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }

    .friend-links-list a:hover {
      color: var(--primary-dark);
      border-color: var(--primary-border);
      background-color: var(--primary-soft);
    }

    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 36px 0;
      color: var(--text-muted);
      font-size: 0.88rem;
      text-align: center;
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 28px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .widget-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-size: 1.2rem;
      cursor: pointer;
      transition: all 0.25s ease;
    }

    .widget-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.06);
    }

    .cta-banner {
      background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
      border: 1px solid var(--primary-border);
      border-radius: var(--radius-lg);
      padding: 48px 36px;
      text-align: center;
      margin-top: 40px;
    }

    .cta-banner h3 {
      font-size: 1.8rem;
      font-weight: 800;
      color: #064e3b;
      margin-bottom: 12px;
    }

    .cta-banner p {
      font-size: 1.05rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 24px;
    }

    @media (max-width: 1024px) {
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 768px) {
      .mobile-toggle {
        display: block;
      }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: var(--shadow-md);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        display: block;
        padding: 10px 0;
        border-bottom: 1px solid #f1f5f9;
      }
      .hero-title {
        font-size: 1.95rem;
      }
      .hero-subtitle {
        font-size: 1rem;
      }
      .card-grid,
      .card-grid-2,
      .gallery-grid,
      .contact-layout,
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .banner-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-stats-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .review-score-banner {
        flex-direction: column;
        text-align: center;
      }
      .score-left {
        flex-direction: column;
      }
    }