:root {
      --primary: #059669;
      --primary-hover: #047857;
      --primary-light: #ecfdf5;
      --primary-mint: #a7f3d0;
      --mint-bg: #f2fbf7;
      --mint-card: #ffffff;
      --text-main: #064e3b;
      --text-dark: #0f172a;
      --text-muted: #334155;
      --border-color: #d1fae5;
      --border-hover: #6ee7b7;
      --shadow-sm: 0 2px 8px rgba(5, 150, 105, 0.06);
      --shadow-md: 0 8px 24px rgba(5, 150, 105, 0.1);
      --shadow-lg: 0 16px 36px rgba(5, 150, 105, 0.12);
      --radius: 12px;
      --radius-sm: 8px;
      --transition: all 0.25s ease;
    }
    * {
      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", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--mint-bg);
      color: var(--text-dark);
      line-height: 1.6;
      background-image: radial-gradient(#d1fae5 0.8px, transparent 0.8px);
      background-size: 24px 24px;
    }
    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 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;
    }
    .brand-wrap img {
      max-height: 44px;
      width: auto;
      display: block;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      display: block;
      padding: 8px 12px;
      font-size: 14px;
      font-weight: 500;
      color: var(--text-dark);
      border-radius: var(--radius-sm);
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .header-action {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 20px;
      font-size: 15px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
    }
    .btn-primary {
      background: var(--primary);
      color: #ffffff !important;
      box-shadow: 0 4px 12px rgba(5, 150, 105, 0.25);
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 16px rgba(5, 150, 105, 0.35);
      transform: translateY(-1px);
    }
    .btn-secondary {
      background: #ffffff;
      color: var(--primary) !important;
      border-color: var(--border-color);
    }
    .btn-secondary:hover {
      background: var(--primary-light);
      border-color: var(--border-hover);
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary);
      cursor: pointer;
      padding: 4px;
    }
    .hero-section {
      padding: 64px 0 50px;
      background: linear-gradient(180deg, rgba(209, 250, 229, 0.4) 0%, rgba(242, 251, 247, 0) 100%);
      text-align: center;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      border-radius: 999px;
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
    }
    .hero-title {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 16px;
      line-height: 1.3;
      letter-spacing: -0.5px;
    }
    .hero-subtitle {
      font-size: 1.1rem;
      color: var(--text-muted);
      max-width: 780px;
      margin: 0 auto 28px;
    }
    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 36px;
    }
    .hero-features-bar {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 20px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .hero-feat-item {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 10px;
      font-weight: 600;
      color: var(--text-dark);
      font-size: 14px;
    }
    .hero-feat-icon {
      width: 28px;
      height: 28px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 50%;
      font-weight: bold;
    }
    .section {
      padding: 60px 0;
    }
    .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 40px;
    }
    .section-tag {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }
    .section-title {
      font-size: 1.85rem;
      color: var(--text-main);
      font-weight: 700;
      margin-bottom: 12px;
    }
    .section-desc {
      font-size: 0.95rem;
      color: var(--text-muted);
    }
    .card-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 24px;
    }
    .card {
      background: var(--mint-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .card:hover {
      border-color: var(--border-hover);
      box-shadow: var(--shadow-md);
      transform: translateY(-3px);
    }
    .card-icon {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
      font-weight: bold;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .media-card:hover {
      box-shadow: var(--shadow-md);
      border-color: var(--border-hover);
    }
    .media-container {
      width: 100%;
      overflow: hidden;
      background: var(--primary-light);
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-container img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-container img {
      transform: scale(1.03);
    }
    .media-content {
      padding: 20px;
    }
    .tags-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 14px;
    }
    .tag-item {
      background: var(--primary-light);
      color: var(--primary);
      font-size: 12px;
      padding: 4px 10px;
      border-radius: 999px;
      font-weight: 500;
    }
    .models-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      padding: 24px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
    }
    .model-chip {
      background: var(--primary-light);
      color: var(--text-main);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }
    .model-chip:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }
    .eval-table th, .eval-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }
    .eval-table th {
      background: var(--primary-light);
      color: var(--text-main);
      font-weight: 700;
    }
    .eval-table tr:hover td {
      background: rgba(236, 253, 245, 0.4);
    }
    .eval-score-badge {
      display: inline-block;
      padding: 4px 10px;
      border-radius: 6px;
      background: #10b981;
      color: #ffffff;
      font-weight: 700;
      font-size: 13px;
    }
    .step-flow {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      text-align: center;
      position: relative;
    }
    .step-number {
      width: 36px;
      height: 36px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      margin: 0 auto 14px;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      max-width: 860px;
      margin: 0 auto;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      overflow: hidden;
      transition: var(--transition);
    }
    .faq-question {
      padding: 18px 20px;
      font-weight: 600;
      color: var(--text-dark);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question:hover {
      color: var(--primary);
      background: var(--primary-light);
    }
    .faq-answer {
      padding: 0 20px 18px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
      display: none;
      border-top: 1px dashed var(--border-color);
      padding-top: 12px;
    }
    .faq-item.active .faq-answer {
      display: block;
    }
    .faq-toggle-icon {
      font-size: 18px;
      font-weight: bold;
      transition: transform 0.2s;
    }
    .faq-item.active .faq-toggle-icon {
      transform: rotate(45deg);
    }
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
      gap: 20px;
    }
    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 22px;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
    }
    .review-header {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .review-avatar {
      width: 44px;
      height: 44px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 16px;
    }
    .review-user-info h4 {
      font-size: 15px;
      color: var(--text-dark);
    }
    .review-user-info p {
      font-size: 12px;
      color: var(--text-muted);
    }
    .review-rating {
      color: #f59e0b;
      font-size: 14px;
      margin-bottom: 8px;
    }
    .review-content {
      font-size: 13.5px;
      color: var(--text-dark);
      line-height: 1.6;
      flex-grow: 1;
    }
    .form-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 36px;
      max-width: 640px;
      margin: 0 auto;
      box-shadow: var(--shadow-md);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-dark);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      background: var(--mint-bg);
      color: var(--text-dark);
      outline: none;
      transition: var(--transition);
    }
    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(5, 150, 105, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }
    .contact-info-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
    }
    .contact-item {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 16px;
      font-size: 14px;
      color: var(--text-dark);
    }
    .contact-qr-wrap {
      text-align: center;
      margin-top: 20px;
      padding: 16px;
      background: var(--primary-light);
      border-radius: var(--radius-sm);
    }
    .contact-qr-wrap img {
      max-width: 140px;
      height: auto;
      margin: 0 auto 8px;
      display: block;
      border-radius: 4px;
    }
    .articles-list {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 16px;
      border-radius: var(--radius-sm);
      font-size: 14px;
    }
    .article-item a {
      color: var(--text-dark);
      font-weight: 500;
      display: inline-block;
    }
    .article-item a:hover {
      color: var(--primary);
    }
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 24px;
      color: var(--text-dark);
    }
    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 30px;
    }
    .footer-desc {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-top: 12px;
      max-width: 380px;
    }
    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
    }
    .footer-links {
      list-style: none;
    }
    .footer-links li {
      margin-bottom: 8px;
    }
    .footer-links a {
      font-size: 13px;
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .friend-links-box {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      margin-bottom: 20px;
    }
    .friend-links-box h6 {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .friend-links-list {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .friend-links-list a {
      font-size: 12.5px;
      color: var(--text-muted);
    }
    .friend-links-list a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 16px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
    }
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 24px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .floating-btn {
      width: 48px;
      height: 48px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(5, 150, 105, 0.35);
      cursor: pointer;
      border: none;
      font-size: 20px;
      transition: var(--transition);
    }
    .floating-btn:hover {
      background: var(--primary-hover);
      transform: scale(1.08);
    }
    @media (max-width: 992px) {
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
    }
    @media (max-width: 768px) {
      .hero-title {
        font-size: 1.75rem;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }