:root {
      --primary: #00b050;
      --primary-dark: #008a3e;
      --primary-deep: #054f26;
      --primary-light: #e8f8ee;
      --primary-mint: #34d399;
      --accent: #10b981;
      --accent-glow: rgba(0, 176, 80, 0.15);
      --bg-main: #f7fbf8;
      --bg-card: #ffffff;
      --border-color: #d1fae5;
      --text-main: #111827;
      --text-muted: #4b5563;
      --text-light: #6b7280;
      --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
      --shadow-md: 0 6px 16px rgba(0, 176, 80, 0.08);
      --shadow-lg: 0 12px 28px rgba(0, 176, 80, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.25s ease-in-out;
    }

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

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 20px;
    }

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      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-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .ai-page-logo {
      height: 44px;
      width: auto;
      display: block;
    }

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

    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
    }

    .nav-link {
      padding: 8px 14px;
      font-size: 0.95rem;
      font-weight: 500;
      color: var(--text-muted);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      white-space: nowrap;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 176, 80, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(0, 176, 80, 0.35);
    }

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

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

    .btn-pulse {
      position: relative;
      animation: pulse-ring 2s infinite;
    }

    @keyframes pulse-ring {
      0% { box-shadow: 0 0 0 0 rgba(0, 176, 80, 0.4); }
      70% { box-shadow: 0 0 0 10px rgba(0, 176, 80, 0); }
      100% { box-shadow: 0 0 0 0 rgba(0, 176, 80, 0); }
    }

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

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

    .section-alt {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 700;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid #bbf7d0;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--primary-deep);
      line-height: 1.3;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
    }

    .hero-section {
      padding: 85px 0 65px;
      background: radial-gradient(circle at 50% 10%, #dcfce7 0%, #f7fbf8 60%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-inner {
      text-align: center;
      max-width: 920px;
      margin: 0 auto;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 18px;
      background: #ffffff;
      border: 1px solid #86efac;
      border-radius: 50px;
      color: var(--primary-dark);
      font-size: 0.9rem;
      font-weight: 600;
      margin-bottom: 24px;
      box-shadow: var(--shadow-sm);
    }

    .hero-badge-dot {
      width: 8px;
      height: 8px;
      background-color: var(--primary);
      border-radius: 50%;
      display: inline-block;
    }

    .hero-title {
      font-size: 2.7rem;
      font-weight: 900;
      line-height: 1.25;
      color: #064e3b;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.2rem;
      color: var(--text-muted);
      margin-bottom: 35px;
      line-height: 1.6;
    }

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

    .hero-official-btn {
      font-size: 1.1rem;
      padding: 14px 34px;
      border-radius: 50px;
      font-weight: 700;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      text-align: left;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .stat-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #86efac;
    }

    .stat-num {
      font-size: 1.7rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 0.88rem;
      color: var(--text-light);
      font-weight: 500;
    }

    .models-marquee-wrap {
      margin-top: 40px;
      padding: 16px 20px;
      background: rgba(255, 255, 255, 0.8);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .models-marquee-title {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
      text-align: center;
    }

    .models-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      justify-content: center;
    }

    .model-tag {
      background-color: var(--primary-light);
      color: var(--primary-deep);
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: var(--radius-sm);
      border: 1px solid #bbf7d0;
    }

    .about-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }

    .about-content h3 {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-deep);
      margin-bottom: 16px;
    }

    .about-content p {
      color: var(--text-muted);
      margin-bottom: 18px;
      font-size: 1rem;
    }

    .about-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .about-point-item {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      background: #f0fdf4;
      padding: 14px;
      border-radius: var(--radius-sm);
      border: 1px solid #bbf7d0;
    }

    .about-point-icon {
      color: var(--primary);
      font-weight: 900;
    }

    .about-point-text h4 {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 2px;
    }

    .about-point-text p {
      font-size: 0.82rem;
      color: var(--text-light);
      margin-bottom: 0;
    }

    .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-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-lg);
      border-color: #86efac;
    }

    .service-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 18px;
    }

    .service-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 10px;
    }

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

    .service-badge {
      display: inline-block;
      align-self: flex-start;
      font-size: 0.78rem;
      padding: 3px 8px;
      background: #ecfdf5;
      color: var(--primary-dark);
      border-radius: 4px;
      font-weight: 600;
    }

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

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      position: relative;
    }

    .process-num {
      width: 42px;
      height: 42px;
      line-height: 42px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 800;
      font-size: 1.1rem;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(0, 176, 80, 0.3);
    }

    .process-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 8px;
    }

    .process-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .compare-box {
      background: #ffffff;
      border: 2px solid #86efac;
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .compare-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
      margin-bottom: 24px;
      flex-wrap: wrap;
      gap: 16px;
    }

    .score-badge {
      display: flex;
      align-items: center;
      gap: 12px;
      background: #f0fdf4;
      padding: 10px 20px;
      border-radius: 50px;
      border: 1px solid #bbf7d0;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.1rem;
      letter-spacing: 2px;
    }

    .score-val {
      font-size: 1.25rem;
      font-weight: 900;
      color: var(--primary-deep);
    }

    .table-responsive {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }

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

    .custom-table th, .custom-table td {
      padding: 16px 18px;
      font-size: 0.95rem;
      border-bottom: 1px solid #e5e7eb;
    }

    .custom-table th {
      background: #f9fafb;
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table td.highlight {
      background: #f0fdf4;
      font-weight: 700;
      color: var(--primary-deep);
      border-left: 2px solid var(--primary);
      border-right: 2px solid var(--primary);
    }

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

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

    .media-card-img-wrap {
      position: relative;
      overflow: hidden;
      background: #e5e7eb;
      aspect-ratio: 16/9;
    }

    .media-card-img-wrap.square {
      aspect-ratio: 1/1;
      max-height: 380px;
    }

    .media-card img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }

    .media-card:hover img {
      transform: scale(1.03);
    }

    .media-card-content {
      padding: 18px 20px;
    }

    .media-card-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 6px;
    }

    .media-card-desc {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

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

    .pricing-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .pricing-card.featured {
      border: 2px solid var(--primary);
      box-shadow: var(--shadow-lg);
      transform: scale(1.02);
    }

    .pricing-tag {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #ffffff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
    }

    .pricing-head {
      margin-bottom: 20px;
      text-align: center;
    }

    .pricing-name {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--primary-deep);
      margin-bottom: 8px;
    }

    .pricing-price {
      font-size: 2.2rem;
      font-weight: 900;
      color: var(--primary);
    }

    .pricing-price span {
      font-size: 0.9rem;
      color: var(--text-light);
      font-weight: 400;
    }

    .pricing-features {
      margin: 20px 0;
      flex-grow: 1;
    }

    .pricing-features li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 10px;
    }

    .pricing-features li::before {
      content: "✓";
      color: var(--primary);
      font-weight: 800;
    }

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

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

    .review-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.6;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f3f4f6;
      padding-top: 14px;
    }

    .review-avatar {
      width: 42px;
      height: 42px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
    }

    .review-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--primary-deep);
    }

    .review-role {
      font-size: 0.8rem;
      color: var(--text-light);
    }

    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      text-align: left;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--primary-deep);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      transition: var(--transition);
    }

    .faq-question:hover {
      background: #f0fdf4;
    }

    .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 ease;
      background: #ffffff;
    }

    .faq-answer-inner {
      padding: 0 24px 20px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 22px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .article-card:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
      box-shadow: var(--shadow-md);
    }

    .article-meta {
      font-size: 0.8rem;
      color: var(--text-light);
      margin-bottom: 8px;
    }

    .article-title {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--primary-deep);
      margin-bottom: 8px;
    }

    .article-excerpt {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-bottom: 12px;
    }

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

    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 780px;
      margin: 0 auto;
    }

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

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

    .form-group.full {
      grid-column: span 2;
    }

    .form-label {
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid #d1d5db;
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      color: var(--text-main);
      background-color: #ffffff;
      transition: var(--transition);
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 176, 80, 0.15);
    }

    textarea.form-control {
      min-height: 110px;
      resize: vertical;
    }

    .site-footer {
      background-color: #064e3b;
      color: #d1fae5;
      padding: 60px 0 24px;
      border-top: 4px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 18px;
    }

    .footer-col p {
      font-size: 0.9rem;
      color: #a7f3d0;
      margin-bottom: 12px;
      line-height: 1.6;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      color: #a7f3d0;
      font-size: 0.9rem;
    }

    .footer-links a:hover {
      color: #ffffff;
      text-decoration: underline;
    }

    .qr-wrap {
      display: flex;
      flex-direction: column;
      align-items: flex-start;
      gap: 8px;
    }

    .qr-wrap img {
      width: 110px;
      height: 110px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      padding: 4px;
    }

    .qr-label {
      font-size: 0.8rem;
      color: #a7f3d0;
    }

    .friend-links-box {
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 0.9rem;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 12px;
    }

    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-list a {
      color: #a7f3d0;
      font-size: 0.85rem;
    }

    .friend-links-list a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      text-align: center;
      font-size: 0.82rem;
      color: #6ee7b7;
    }

    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .floating-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0, 0, 0, 0.15);
      border: 1px solid var(--border-color);
      cursor: pointer;
      transition: var(--transition);
      font-size: 1.2rem;
    }

    .floating-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: translateY(-3px);
    }

    .back-to-top {
      display: none;
    }

    .back-to-top.show {
      display: flex;
    }

    @media (max-width: 992px) {
      .hero-title {
        font-size: 2.2rem;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
      .services-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-timeline {
        grid-template-columns: repeat(2, 1fr);
      }
      .pricing-grid {
        grid-template-columns: 1fr;
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-toggle {
        display: block;
      }
      .nav-links {
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        align-items: stretch;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
        display: none;
        padding: 12px 20px;
      }
      .nav-links.active {
        display: flex;
      }
      .header-actions {
        display: none;
      }
      .hero-title {
        font-size: 1.8rem;
      }
      .section-title {
        font-size: 1.6rem;
      }
      .services-grid {
        grid-template-columns: 1fr;
      }
      .process-timeline {
        grid-template-columns: 1fr;
      }
      .media-gallery-grid {
        grid-template-columns: 1fr;
      }
      .articles-grid {
        grid-template-columns: 1fr;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group.full {
        grid-column: span 1;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }