:root {
      --primary: #0ca574;
      --primary-dark: #087f59;
      --primary-light: #e6fcf5;
      --mint-accent: #20c997;
      --mint-subtle: #f4fbf8;
      --text-main: #1a2e26;
      --text-muted: #526b60;
      --border-color: #d3ede1;
      --card-bg: #ffffff;
      --body-bg: #f8fcfa;
      --shadow-sm: 0 2px 8px rgba(12, 165, 116, 0.06);
      --shadow-md: 0 8px 24px rgba(12, 165, 116, 0.1);
      --radius: 12px;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--body-bg);
      color: var(--text-main);
      line-height: 1.65;
      position: relative;
    }
    .container {
      width: 100%;
      max-width: 1200px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }
    /* 顶部导航 */
    header.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);
    }
    .nav-wrapper {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .logo-box {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }
    .logo-box img.ai-page-logo {
      height: 40px;
      width: auto;
      display: block;
    }
    .logo-title {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.92rem;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: color 0.2s, background-color 0.2s;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background-color: var(--primary-light);
    }
    .nav-btn-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      transition: all 0.25s ease;
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary {
      background-color: var(--primary);
      color: #ffffff;
      box-shadow: 0 4px 12px rgba(12, 165, 116, 0.25);
    }
    .btn-primary:hover {
      background-color: var(--primary-dark);
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(12, 165, 116, 0.35);
    }
    .btn-outline {
      background-color: transparent;
      color: var(--primary-dark);
      border-color: var(--primary);
    }
    .btn-outline:hover {
      background-color: var(--primary-light);
    }
    .menu-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .menu-toggle span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }

    /* 首屏 Hero */
    .hero-section {
      padding: 84px 0 60px;
      background: linear-gradient(180deg, var(--mint-subtle) 0%, #ffffff 100%);
      text-align: center;
      position: relative;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 30px;
      border: 1px solid var(--border-color);
      margin-bottom: 24px;
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 800;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-title span {
      color: var(--primary);
    }
    .hero-desc {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 820px;
      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: 50px;
    }
    .btn-hero-large {
      padding: 14px 34px;
      font-size: 1.05rem;
    }
    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 20px;
    }
    .metric-card {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s, box-shadow 0.25s;
    }
    .metric-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }
    .metric-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin-bottom: 4px;
    }
    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    /* 通用分节 */
    section.page-section {
      padding: 80px 0;
      border-bottom: 1px solid rgba(211, 237, 225, 0.4);
    }
    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 50px;
    }
    .section-eyebrow {
      color: var(--primary);
      font-size: 0.85rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 关于与平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      align-items: center;
    }
    .intro-text-block p {
      margin-bottom: 16px;
      color: var(--text-muted);
      font-size: 1rem;
    }
    .feature-check-list {
      list-style: none;
      margin-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
    }
    .feature-check-list li {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 500;
      font-size: 0.95rem;
      color: var(--text-main);
    }
    .check-icon {
      width: 18px;
      height: 18px;
      fill: var(--primary);
      flex-shrink: 0;
    }
    .intro-box-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }
    .model-tag {
      background: var(--mint-subtle);
      border: 1px solid var(--border-color);
      padding: 6px 12px;
      border-radius: 6px;
      font-size: 0.82rem;
      font-weight: 500;
      color: var(--primary-dark);
    }

    /* 服务卡片网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 30px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
    }
    .service-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-md);
      border-color: var(--mint-accent);
    }
    .service-icon {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
    }
    .service-icon svg { width: 24px; height: 24px; fill: currentColor; }
    .service-card h3 {
      font-size: 1.2rem;
      margin-bottom: 12px;
      color: var(--text-main);
    }
    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 一站式矩阵 4列 */
    .matrix-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .matrix-item {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      transition: transform 0.2s ease;
    }
    .matrix-item:hover {
      transform: translateY(-3px);
      border-color: var(--primary);
    }
    .matrix-item h4 {
      font-size: 1.05rem;
      margin-bottom: 8px;
      color: var(--primary-dark);
    }
    .matrix-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      padding: 28px;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
      text-align: center;
    }
    .step-number {
      width: 44px;
      height: 44px;
      line-height: 44px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      font-weight: 700;
      margin: 0 auto 16px;
      font-size: 1.1rem;
    }
    .step-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--text-main);
    }
    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 媒体素材与案例区 */
    .media-showcase-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-bottom: 30px;
    }
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }
    .media-img-wrap {
      width: 100%;
      overflow: hidden;
      background: #eef6f2;
    }
    .media-img-wrap img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover .media-img-wrap img {
      transform: scale(1.02);
    }
    .media-info {
      padding: 20px;
    }
    .media-info h4 {
      font-size: 1.05rem;
      margin-bottom: 6px;
      color: var(--text-main);
    }
    .media-info p {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .banner-gallery {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .banner-item {
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border-color);
    }
    .banner-item img {
      width: 100%;
      height: auto;
      display: block;
    }

    /* 对比评测表格 */
    .eval-highlight-box {
      background: var(--primary-light);
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 30px;
      flex-wrap: wrap;
      gap: 20px;
    }
    .eval-score {
      font-size: 2.8rem;
      font-weight: 800;
      color: var(--primary-dark);
      line-height: 1;
    }
    .eval-score-sub {
      font-size: 1rem;
      color: var(--text-muted);
      margin-left: 6px;
    }
    .stars {
      color: #f59f00;
      font-size: 1.4rem;
      letter-spacing: 2px;
    }
    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius);
      border: 1px solid var(--border-color);
    }
    .custom-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }
    .custom-table th, .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }
    .custom-table th {
      background-color: var(--mint-subtle);
      color: var(--text-main);
      font-weight: 600;
    }
    .custom-table td.strong-cell {
      font-weight: 700;
      color: var(--primary-dark);
    }
    .badge-win {
      background: #d3f9d8;
      color: #2b8a3e;
      padding: 4px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
    }

    /* 用户评论 */
    .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);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }
    .review-stars {
      color: #f59f00;
      margin-bottom: 12px;
      font-size: 0.95rem;
    }
    .review-text {
      font-size: 0.92rem;
      color: var(--text-main);
      line-height: 1.6;
      margin-bottom: 16px;
    }
    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0f7f3;
      padding-top: 12px;
    }
    .reviewer-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 0.9rem;
    }
    .reviewer-info h5 {
      font-size: 0.92rem;
      color: var(--text-main);
    }
    .reviewer-info span {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

    /* FAQ 折叠 */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-item.active {
      border-color: var(--primary);
    }
    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-weight: 600;
      font-size: 1rem;
      color: var(--text-main);
    }
    .faq-icon-arrow {
      transition: transform 0.3s;
      width: 18px;
      height: 18px;
      fill: var(--primary);
    }
    .faq-item.active .faq-icon-arrow {
      transform: rotate(180deg);
    }
    .faq-answer {
      display: none;
      padding: 0 24px 20px 24px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* 需求匹配表单 */
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 40px;
      max-width: 800px;
      margin: 0 auto;
      box-shadow: var(--shadow-sm);
    }
    .form-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
      margin-bottom: 20px;
    }
    .form-group-full {
      grid-column: span 2;
    }
    .form-label {
      display: block;
      margin-bottom: 6px;
      font-weight: 600;
      font-size: 0.9rem;
      color: var(--text-main);
    }
    .form-control {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.95rem;
      outline: none;
      transition: border-color 0.2s, box-shadow 0.2s;
      background-color: var(--mint-subtle);
    }
    .form-control:focus {
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(12, 165, 116, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 110px;
    }

    /* 行业资讯与短代码占位 */
    .articles-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-bottom: 30px;
    }
    .article-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
    }
    .article-card a {
      text-decoration: none;
      font-weight: 600;
      font-size: 1.05rem;
      color: var(--primary-dark);
      display: block;
      margin-bottom: 8px;
    }
    .article-card a:hover {
      color: var(--primary);
      text-decoration: underline;
    }
    .article-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 底部通用规范 */
    footer.site-footer {
      background-color: #0b221a;
      color: #e6fcf5;
      padding: 60px 0 30px;
      border-top: 1px solid #143b2e;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-col h4 {
      font-size: 1.05rem;
      margin-bottom: 16px;
      color: #ffffff;
    }
    .footer-col p {
      font-size: 0.88rem;
      color: #8bbfae;
      line-height: 1.6;
      margin-bottom: 10px;
    }
    .footer-col ul {
      list-style: none;
    }
    .footer-col ul li {
      margin-bottom: 8px;
    }
    .footer-col ul li a {
      color: #a4d4c5;
      text-decoration: none;
      font-size: 0.88rem;
      transition: color 0.2s;
    }
    .footer-col ul li a:hover {
      color: #20c997;
    }
    .footer-qr-block {
      display: flex;
      align-items: center;
      gap: 14px;
    }
    .footer-qr-img {
      width: 88px;
      height: 88px;
      background: #ffffff;
      padding: 4px;
      border-radius: 6px;
    }
    .footer-qr-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
      display: block;
    }
    .footer-bottom {
      border-top: 1px solid #164032;
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.82rem;
      color: #79a899;
    }
    .friendly-links {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }
    .friendly-links a {
      color: #8bbfae;
      text-decoration: none;
    }
    .friendly-links a:hover {
      color: #20c997;
    }

    /* 浮动客服 */
    .float-service {
      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: var(--primary);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 14px rgba(0,0,0,0.18);
      cursor: pointer;
      text-decoration: none;
      transition: transform 0.2s, background-color 0.2s;
    }
    .float-btn:hover {
      transform: scale(1.08);
      background-color: var(--primary-dark);
    }
    .float-btn svg {
      width: 22px;
      height: 22px;
      fill: currentColor;
    }

    /* 响应式断点 */
    @media (max-width: 992px) {
      .hero-title { font-size: 2.2rem; }
      .hero-metrics { grid-template-columns: repeat(2, 1fr); }
      .intro-grid { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: repeat(2, 1fr); }
      .matrix-grid { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .reviews-grid { grid-template-columns: 1fr; }
      .media-showcase-grid { grid-template-columns: 1fr; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .menu-toggle { display: block; }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 16px 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show { display: flex; }
      .nav-links li { width: 100%; }
      .nav-links li a { display: block; padding: 10px 0; }
      .nav-btn-group { display: none; }
      .hero-title { font-size: 1.85rem; }
      .hero-metrics { grid-template-columns: 1fr; }
      .services-grid { grid-template-columns: 1fr; }
      .matrix-grid { grid-template-columns: 1fr; }
      .process-timeline { grid-template-columns: 1fr; }
      .banner-gallery { 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; }
    }