:root {
      --primary: #e02462;
      --primary-hover: #c41851;
      --primary-light: #fff0f5;
      --primary-gradient: linear-gradient(135deg, #ff2a7a 0%, #e02462 60%, #9e103f 100%);
      --accent: #ff4d88;
      --accent-soft: #ffe4ee;
      --text-main: #1f2329;
      --text-muted: #5f6672;
      --text-light: #8f95a3;
      --bg-base: #fdfafb;
      --bg-surface: #ffffff;
      --bg-subtle: #fcf4f7;
      --border-color: #f7d6e2;
      --border-light: #fbeaf0;
      --shadow-sm: 0 2px 8px rgba(224, 36, 98, 0.06);
      --shadow-md: 0 8px 24px rgba(224, 36, 98, 0.08);
      --shadow-lg: 0 16px 36px rgba(224, 36, 98, 0.12);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.28s ease;
    }

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

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

    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

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

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

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

    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }

    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      max-width: 220px;
    }

    .logo-box .ai-page-logo {
      height: 42px;
      width: auto;
      object-fit: contain;
    }

    .logo-text {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
    }

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

    .nav-links li a {
      padding: 8px 14px;
      font-size: 0.938rem;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.938rem;
      font-weight: 600;
      border-radius: var(--radius-sm);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
      text-align: center;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(224, 36, 98, 0.3);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(224, 36, 98, 0.4);
      color: #ffffff;
    }

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

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

    .btn-large {
      padding: 14px 32px;
      font-size: 1.05rem;
      border-radius: var(--radius-md);
    }

    .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 {
      padding: 80px 0 60px;
      background: linear-gradient(180deg, #fff2f6 0%, #ffffff 100%);
      border-bottom: 1px solid var(--border-light);
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background-color: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: 30px;
      color: var(--primary);
      font-size: 0.875rem;
      font-weight: 600;
      margin-bottom: 20px;
    }

    .hero-title {
      font-size: 2.75rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
      position: relative;
      display: inline-block;
    }

    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px;
      line-height: 1.75;
    }

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

    .hero-highlights {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      padding-top: 36px;
      border-top: 1px dashed var(--border-color);
    }

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

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

    .stat-label {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }

    .stat-val {
      font-size: 1.5rem;
      font-weight: 800;
      color: var(--primary);
    }

    .stat-sub {
      font-size: 0.812rem;
      color: var(--text-light);
      margin-top: 4px;
    }

    .page-section {
      padding: 72px 0;
      border-bottom: 1px solid var(--border-light);
    }

    .section-header {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 50px;
    }

    .section-tag {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
      display: inline-block;
    }

    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
    }

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

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

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

    .feature-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 28px 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .feature-card:hover {
      transform: translateY(-5px);
      border-color: var(--primary);
      box-shadow: var(--shadow-md);
    }

    .card-icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      font-weight: 800;
      margin-bottom: 18px;
    }

    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .card-text {
      font-size: 0.905rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
    }

    .card-tag-list {
      display: flex;
      flex-wrap: wrap;
      gap: 6px;
    }

    .pill-tag {
      font-size: 0.75rem;
      padding: 3px 8px;
      border-radius: 4px;
      background: var(--bg-subtle);
      color: var(--primary);
      border: 1px solid var(--border-light);
    }

    .model-badge-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-badge {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-badge:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: var(--primary-light);
      transform: translateY(-2px);
    }

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

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

    .media-card img {
      width: 100%;
      height: auto;
      object-fit: contain;
    }

    .media-caption {
      padding: 16px;
      font-size: 0.875rem;
      color: var(--text-muted);
      background: var(--bg-surface);
      border-top: 1px solid var(--border-light);
    }

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

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

    .step-no {
      font-size: 1.5rem;
      font-weight: 900;
      color: var(--primary);
      margin-bottom: 12px;
      display: inline-block;
    }

    .step-box h4 {
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-box p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-light);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-light);
      font-size: 0.938rem;
    }

    .compare-table th {
      background: var(--bg-subtle);
      color: var(--text-main);
      font-weight: 700;
    }

    .compare-table tr:hover {
      background: var(--primary-light);
    }

    .compare-table td.highlight {
      font-weight: 700;
      color: var(--primary);
    }

    .rating-banner {
      background: linear-gradient(135deg, #fff0f5 0%, #ffffff 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      margin-bottom: 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
    }

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

    .rating-stars {
      color: #ff9800;
      font-size: 1.3rem;
      margin-left: 8px;
    }

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

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

    .faq-item:hover {
      border-color: var(--border-color);
    }

    .faq-trigger {
      width: 100%;
      padding: 18px 24px;
      background: none;
      border: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 1.025rem;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      text-align: left;
    }

    .faq-icon {
      font-size: 1.25rem;
      color: var(--primary);
      transition: transform 0.28s ease;
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      background: var(--bg-subtle);
    }

    .faq-answer-inner {
      padding: 0 24px 18px;
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    .faq-item.active .faq-answer {
      max-height: 240px;
      padding-top: 10px;
    }

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

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

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

    .review-text {
      font-size: 0.925rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 20px;
      font-style: italic;
    }

    .reviewer {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-light);
      padding-top: 14px;
    }

    .reviewer-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: 1rem;
    }

    .reviewer-name {
      font-size: 0.938rem;
      font-weight: 700;
      color: var(--text-main);
    }

    .reviewer-role {
      font-size: 0.812rem;
      color: var(--text-light);
    }

    .contact-form-card {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

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

    .form-group label {
      display: block;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.938rem;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      background-color: var(--bg-base);
      color: var(--text-main);
      outline: none;
      transition: var(--transition);
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(224, 36, 98, 0.12);
      background-color: #ffffff;
    }

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

    .info-tile {
      display: flex;
      align-items: flex-start;
      gap: 16px;
      margin-bottom: 24px;
    }

    .info-icon {
      width: 42px;
      height: 42px;
      border-radius: var(--radius-sm);
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      flex-shrink: 0;
    }

    .info-title {
      font-size: 0.938rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 4px;
    }

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

    .qr-box {
      margin-top: 24px;
      background: var(--bg-subtle);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
    }

    .qr-img {
      width: 130px;
      height: 130px;
      margin: 0 auto 12px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-light);
      background: #ffffff;
      padding: 6px;
    }

    .qr-tip {
      font-size: 0.812rem;
      color: var(--text-muted);
    }

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

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-light);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .article-title {
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }

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

    .article-meta {
      font-size: 0.812rem;
      color: var(--text-light);
      display: flex;
      justify-content: space-between;
      margin-top: 14px;
    }

    .footer-section {
      background: #ffffff;
      border-top: 1px solid var(--border-light);
      padding: 60px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 48px;
    }

    .footer-brand p {
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-top: 14px;
      line-height: 1.6;
      max-width: 320px;
    }

    .footer-col h5 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }

    .footer-col ul {
      list-style: none;
    }

    .footer-col ul li {
      margin-bottom: 10px;
    }

    .footer-col ul li a {
      font-size: 0.875rem;
      color: var(--text-muted);
    }

    .footer-col ul li a:hover {
      color: var(--primary);
    }

    .footer-links-box {
      border-top: 1px dashed var(--border-light);
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .footer-links-box span {
      font-size: 0.875rem;
      font-weight: 700;
      color: var(--text-main);
      margin-right: 12px;
    }

    .footer-links-box a {
      display: inline-block;
      font-size: 0.875rem;
      color: var(--text-muted);
      margin-right: 16px;
      margin-bottom: 8px;
    }

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

    .footer-bottom {
      border-top: 1px solid var(--border-light);
      padding-top: 20px;
      text-align: center;
      font-size: 0.812rem;
      color: var(--text-light);
    }

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

    .float-btn {
      width: 46px;
      height: 46px;
      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);
      font-size: 1.2rem;
      cursor: pointer;
      transition: var(--transition);
    }

    .float-btn:hover {
      background: var(--primary);
      color: #ffffff;
      transform: scale(1.08);
    }

    @media (max-width: 992px) {
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3, .review-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-chain {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .two-col-layout {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .hero-highlights {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-4, .card-grid-3, .review-grid, .articles-grid, .steps-chain {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border-light);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }