:root {
      --primary: #059669;
      --primary-vibrant: #00b96b;
      --primary-dark: #064e3b;
      --primary-light: #e6f9f0;
      --primary-border: #a7f3d0;
      --accent: #10b981;
      --accent-glow: #34d399;
      --text-main: #0f172a;
      --text-sub: #334155;
      --text-muted: #64748b;
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --bg-section-alt: #f0fdf4;
      --border-color: #e2e8f0;
      --card-shadow: 0 4px 20px -2px rgba(5, 150, 105, 0.08), 0 2px 6px -1px rgba(0, 0, 0, 0.04);
      --card-shadow-hover: 0 12px 28px -4px rgba(5, 150, 105, 0.16), 0 4px 10px -2px rgba(0, 0, 0, 0.06);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      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(--bg-main);
      color: var(--text-main);
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
    }

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

    img {
      max-width: 100%;
      height: auto;
      display: block;
    }

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

    .header-nav {
      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: 0 1px 3px rgba(0,0,0,0.03);
    }

    .nav-container {
      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: 40px;
      width: auto;
      object-fit: contain;
    }

    .brand-text {
      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 {
      padding: 8px 12px;
      font-size: 0.92rem;
      font-weight: 500;
      color: var(--text-sub);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }

    .nav-action {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 16px;
    }

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

    .btn-primary {
      background-color: var(--primary-vibrant);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(0, 185, 107, 0.3);
    }

    .btn-primary:hover {
      background-color: var(--primary);
      box-shadow: 0 6px 16px rgba(0, 185, 107, 0.4);
      transform: translateY(-1px);
    }

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

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

    .btn-lg {
      padding: 14px 28px;
      font-size: 1.05rem;
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }

    .mobile-menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    .hero-section {
      background: linear-gradient(135deg, #f0fdf4 0%, #e6f9f0 50%, #ffffff 100%);
      padding: 80px 0 60px;
      border-bottom: 1px solid var(--border-color);
      position: relative;
      overflow: hidden;
    }

    .hero-section::before {
      content: "";
      position: absolute;
      top: -100px;
      right: -100px;
      width: 400px;
      height: 400px;
      background: radial-gradient(circle, rgba(52, 211, 153, 0.15) 0%, rgba(255,255,255,0) 70%);
      border-radius: 50%;
      pointer-events: none;
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid var(--primary-border);
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.5rem;
      line-height: 1.25;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-sub);
      margin-bottom: 32px;
      line-height: 1.7;
    }

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

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

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

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

    .feature-card-header {
      font-size: 1rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

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

    .feature-card-desc {
      font-size: 0.85rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .section-wrap {
      padding: 70px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .section-wrap.alt-bg {
      background-color: var(--bg-section-alt);
    }

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

    .section-subhead {
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

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

    .models-tags-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 30px;
    }

    .model-chip {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      font-size: 0.88rem;
      font-weight: 500;
      color: var(--text-sub);
      box-shadow: 0 1px 3px rgba(0,0,0,0.02);
      transition: var(--transition);
    }

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

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

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

    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 30px;
    }

    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .service-title {
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--primary-dark);
      margin-bottom: 12px;
    }

    .service-text {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
      flex-grow: 1;
    }

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

    .scenario-item {
      background: #ffffff;
      border-radius: var(--radius-md);
      padding: 22px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .scenario-item:hover {
      border-color: var(--primary-vibrant);
      box-shadow: var(--card-shadow-hover);
    }

    .scenario-name {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .scenario-tag {
      font-size: 0.75rem;
      padding: 2px 8px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 4px;
      font-weight: 600;
    }

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

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

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

    .process-step {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary);
      color: #ffffff;
      font-weight: 700;
      border-radius: 50%;
      margin: 0 auto 16px;
      box-shadow: 0 4px 10px rgba(5, 150, 105, 0.3);
    }

    .process-name {
      font-size: 1.1rem;
      font-weight: 700;
      margin-bottom: 8px;
      color: var(--text-main);
    }

    .process-info {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .comparison-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      overflow-x: auto;
    }

    .score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: linear-gradient(90deg, #e6f9f0 0%, #ffffff 100%);
      padding: 20px 24px;
      border-radius: var(--radius-md);
      margin-bottom: 24px;
      border-left: 4px solid var(--primary-vibrant);
    }

    .score-left h3 {
      font-size: 1.25rem;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 1.1rem;
    }

    .score-num {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
    }

    .score-num span {
      font-size: 1rem;
      color: var(--text-muted);
      font-weight: normal;
    }

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

    .custom-table th, .custom-table td {
      padding: 16px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.95rem;
    }

    .custom-table th {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-weight: 600;
    }

    .custom-table tr:hover {
      background-color: #fcfdfd;
    }

    .highlight-cell {
      color: var(--primary);
      font-weight: 600;
    }

    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-bottom: 30px;
    }

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

    .gallery-img-wrap {
      width: 100%;
      height: 240px;
      overflow: hidden;
      background-color: #e2e8f0;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }

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

    .gallery-info {
      padding: 16px;
    }

    .gallery-title {
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .gallery-meta {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .banners-strip {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 24px;
    }

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

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

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

    .review-quote {
      font-size: 0.92rem;
      color: var(--text-sub);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .review-author {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .author-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.95rem;
      border: 1px solid var(--primary-border);
    }

    .author-meta h4 {
      font-size: 0.92rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .author-meta p {
      font-size: 0.78rem;
      color: var(--text-muted);
    }

    .faq-accordion {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-question {
      padding: 18px 24px;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question:hover {
      color: var(--primary);
      background-color: #fafbfc;
    }

    .faq-toggle-icon {
      font-size: 1.2rem;
      font-weight: bold;
      transition: var(--transition);
      color: var(--primary);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      color: var(--text-sub);
      font-size: 0.92rem;
      line-height: 1.6;
      border-top: 1px solid #f1f5f9;
      background-color: #fcfdfd;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

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

    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }

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

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

    .form-label {
      display: block;
      font-size: 0.88rem;
      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-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background-color: #fff;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-control:focus {
      outline: none;
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(0, 185, 107, 0.15);
    }

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

    .contact-info-card {
      background: #ffffff;
      padding: 32px;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .contact-icon {
      width: 36px;
      height: 36px;
      background: var(--primary-light);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: bold;
      flex-shrink: 0;
    }

    .qr-block {
      display: flex;
      align-items: center;
      gap: 20px;
      padding: 16px;
      background: var(--bg-section-alt);
      border-radius: var(--radius-md);
      border: 1px dashed var(--primary-border);
    }

    .qr-img {
      width: 90px;
      height: 90px;
      object-fit: contain;
      background: #ffffff;
      padding: 4px;
      border-radius: 6px;
    }

    .articles-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .article-item {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
    }

    .article-item:last-child {
      border-bottom: none;
    }

    .article-item a {
      font-size: 0.95rem;
      color: var(--text-sub);
      font-weight: 500;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    .article-tag {
      font-size: 0.75rem;
      background: var(--primary-light);
      color: var(--primary);
      padding: 2px 8px;
      border-radius: 4px;
    }

    .agent-box {
      background: linear-gradient(135deg, #064e3b 0%, #059669 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      box-shadow: var(--card-shadow-hover);
    }

    .agent-content h3 {
      font-size: 1.8rem;
      margin-bottom: 12px;
      font-weight: 800;
    }

    .agent-content p {
      font-size: 1rem;
      color: #e6f9f0;
      line-height: 1.6;
      max-width: 650px;
    }

    .agent-action {
      flex-shrink: 0;
    }

    .agent-btn {
      background: #ffffff;
      color: var(--primary-dark);
      font-weight: 700;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      box-shadow: 0 4px 14px rgba(0,0,0,0.15);
      display: inline-block;
    }

    .agent-btn:hover {
      background: #f0fdf4;
      transform: translateY(-2px);
    }

    .site-footer {
      background-color: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 48px 0 24px;
      color: var(--text-sub);
    }

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

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links a {
      font-size: 0.88rem;
      color: var(--text-muted);
    }

    .footer-links a:hover {
      color: var(--primary);
    }

    .friendly-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 8px;
    }

    .friendly-links-wrap a {
      font-size: 0.85rem;
      color: var(--text-muted);
      background: var(--bg-main);
      padding: 4px 10px;
      border-radius: 4px;
      border: 1px solid var(--border-color);
    }

    .friendly-links-wrap a:hover {
      color: var(--primary);
      border-color: var(--primary-border);
    }

    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 20px;
      text-align: center;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

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

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 12px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 1.1rem;
      cursor: pointer;
      transition: var(--transition);
      text-decoration: none;
    }

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

    @media (max-width: 992px) {
      .hero-features-grid,
      .grid-4,
      .process-timeline,
      .banners-strip {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3,
      .scenarios-grid,
      .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero-title {
        font-size: 2rem;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .agent-box {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 768px) {
      .mobile-menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 15px rgba(0,0,0,0.05);
        display: none;
      }
      .nav-menu.active {
        display: flex;
      }
      .nav-links {
        flex-direction: column;
        width: 100%;
        gap: 0;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 12px 16px;
      }
      .nav-action {
        margin: 16px 0 0;
        width: 100%;
      }
      .nav-action .btn {
        width: 100%;
      }
      .hero-features-grid,
      .grid-4,
      .grid-3,
      .grid-2,
      .scenarios-grid,
      .process-timeline,
      .gallery-grid,
      .reviews-grid,
      .banners-strip,
      .footer-top {
        grid-template-columns: 1fr;
      }
      .hero-title {
        font-size: 1.6rem;
      }
      .section-title {
        font-size: 1.5rem;
      }
      .score-banner {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
      }
    }