:root {
      --primary: #0ca678;
      --primary-dark: #099268;
      --primary-light: #e6fcf5;
      --primary-border: #c3fae8;
      --accent: #20c997;
      --text-main: #1d2d27;
      --text-muted: #576d63;
      --bg-main: #f5fbf8;
      --bg-surface: #ffffff;
      --border-color: #d3f9e9;
      --shadow-sm: 0 2px 8px rgba(12, 166, 120, 0.05);
      --shadow-md: 0 8px 24px rgba(12, 166, 120, 0.08);
      --shadow-lg: 0 16px 36px rgba(12, 166, 120, 0.12);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

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

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

    body {
      font-family: var(--font-sans);
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: all 0.25s ease;
    }

    ul, ol {
      list-style: none;
    }

    .container {
      width: 100%;
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
    }

    .brand-area {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .brand-area .ai-page-logo {
      height: 42px;
      width: auto;
      display: block;
    }

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

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

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

    .nav-item:hover,
    .nav-item.active {
      color: var(--primary-dark);
      background: var(--primary-light);
    }

    .header-action {
      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: var(--radius-sm);
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
      color: #ffffff;
      box-shadow: 0 4px 14px rgba(12, 166, 120, 0.25);
    }

    .btn-primary:hover {
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(12, 166, 120, 0.35);
    }

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

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

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

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.6rem;
      color: var(--text-main);
      cursor: pointer;
    }

    /* 模块通用头 */
    .section-wrap {
      padding: 80px 0;
      position: relative;
    }

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

    .section-tag {
      display: inline-block;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.85rem;
      font-weight: 600;
      border-radius: 20px;
      margin-bottom: 12px;
      border: 1px solid var(--primary-border);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      letter-spacing: -0.5px;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 HERO - 纯 CSS/排版无图渲染 */
    .hero-section {
      padding: 90px 0 70px 0;
      background: radial-gradient(circle at 80% 20%, #d8f5eb 0%, #f4fbf8 65%);
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 40px;
      align-items: center;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 30px;
      font-size: 0.88rem;
      color: var(--primary-dark);
      font-weight: 600;
      box-shadow: var(--shadow-sm);
      margin-bottom: 24px;
    }

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

    .hero-title {
      font-size: 2.7rem;
      line-height: 1.25;
      font-weight: 900;
      color: var(--text-main);
      margin-bottom: 20px;
    }

    .hero-title .highlight {
      color: var(--primary);
      position: relative;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      line-height: 1.8;
      margin-bottom: 34px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      margin-bottom: 36px;
    }

    .hero-stats {
      display: flex;
      gap: 28px;
      padding-top: 24px;
      border-top: 1px solid var(--border-color);
    }

    .stat-item h3 {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-dark);
    }

    .stat-item p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .hero-visual-card {
      background: #ffffff;
      border: 1px solid var(--primary-border);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-lg);
      position: relative;
    }

    .model-terminal {
      background: #f8fcfa;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
    }

    .terminal-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 16px;
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    .terminal-dots {
      display: flex;
      gap: 6px;
    }

    .terminal-dots i {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      display: inline-block;
      background: #c3fae8;
    }

    .terminal-content {
      font-family: monospace;
      font-size: 0.9rem;
      color: var(--text-main);
      line-height: 1.9;
    }

    .terminal-tag {
      color: var(--primary-dark);
      font-weight: bold;
    }

    .feature-pills {
      margin-top: 20px;
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }

    .pill {
      padding: 6px 12px;
      background: var(--primary-light);
      color: var(--primary-dark);
      font-size: 0.8rem;
      font-weight: 600;
      border-radius: 6px;
    }

    /* 平台核心模型支持标签墙 */
    .model-strip {
      background: #ffffff;
      padding: 20px 0;
      border-bottom: 1px solid var(--border-color);
    }

    .strip-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-muted);
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }

    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }

    .m-tag {
      font-size: 0.85rem;
      padding: 5px 12px;
      background: #f0fbf6;
      border: 1px solid var(--primary-border);
      border-radius: 20px;
      color: var(--text-main);
      font-weight: 500;
    }

    /* 关于我们 & 平台介绍 */
    .about-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

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

    .about-features {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 18px;
      margin-top: 24px;
    }

    .af-card {
      background: #f8fcfa;
      padding: 16px 20px;
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
    }

    .af-card h4 {
      font-size: 1rem;
      color: var(--text-main);
      margin-bottom: 6px;
    }

    .af-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 服务与能力网格 */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 24px;
    }

    .service-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      transition: all 0.3s ease;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .service-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary-dark);
      font-weight: bold;
      font-size: 1.2rem;
      margin-bottom: 18px;
    }

    .service-card h3 {
      font-size: 1.2rem;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .service-card p {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      margin-bottom: 16px;
      flex-grow: 1;
    }

    .service-meta {
      font-size: 0.82rem;
      color: var(--primary-dark);
      font-weight: 600;
      background: #f0fbf6;
      padding: 4px 10px;
      border-radius: 4px;
      display: inline-block;
      width: fit-content;
    }

    /* 行业解决方案与全自动创作 */
    .scenario-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
      gap: 24px;
    }

    .scenario-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
    }

    .scenario-item h4 {
      font-size: 1.1rem;
      color: var(--text-main);
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 10px;
    }

    .scenario-item h4::before {
      content: "";
      width: 8px;
      height: 8px;
      background: var(--primary);
      border-radius: 50%;
    }

    .scenario-item p {
      font-size: 0.9rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 标准流程 4 步 */
    .flow-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }

    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px 20px;
      text-align: center;
      position: relative;
    }

    .step-num {
      width: 44px;
      height: 44px;
      line-height: 44px;
      border-radius: 50%;
      background: var(--primary);
      color: #ffffff;
      font-size: 1.2rem;
      font-weight: bold;
      margin: 0 auto 16px auto;
    }

    .step-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
    }

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

    /* 案例中心图文展示 */
    .case-gallery {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 30px;
    }

    .case-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
    }

    .case-img-wrap {
      width: 100%;
      background: #f0fbf6;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .case-img-wrap img {
      max-width: 100%;
      height: auto;
      display: block;
      object-fit: contain;
      transition: transform 0.4s ease;
    }

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

    .case-info {
      padding: 24px;
    }

    .case-info h4 {
      font-size: 1.25rem;
      margin-bottom: 8px;
    }

    .case-info p {
      font-size: 0.92rem;
      color: var(--text-muted);
    }

    /* 对比评测表格板块 */
    .eval-card {
      background: #ffffff;
      border: 1px solid var(--primary-border);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
    }

    .eval-header-summary {
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      background: #f4fbf8;
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 30px;
      border: 1px solid var(--primary-border);
    }

    .score-badge {
      font-size: 1.8rem;
      font-weight: 800;
      color: var(--primary-dark);
    }

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

    .table-container {
      width: 100%;
      overflow-x: auto;
    }

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

    .custom-table th,
    .custom-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #ebf8f2;
      font-size: 0.95rem;
    }

    .custom-table th {
      background: #f0fbf6;
      color: var(--text-main);
      font-weight: 700;
    }

    .custom-table tr:hover td {
      background: #fbfefc;
    }

    .status-good {
      color: var(--primary-dark);
      font-weight: 700;
    }

    .status-normal {
      color: #7b8e85;
    }

    /* Token 比价看板 */
    .token-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
      gap: 20px;
    }

    .token-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      text-align: center;
      border-top: 4px solid var(--primary);
    }

    .token-card h4 {
      font-size: 1.2rem;
      margin-bottom: 8px;
    }

    .token-price {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--primary-dark);
      margin: 12px 0;
    }

    .token-price small {
      font-size: 0.85rem;
      font-weight: normal;
      color: var(--text-muted);
    }

    .token-card p {
      font-size: 0.85rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .review-text {
      font-size: 0.95rem;
      color: var(--text-main);
      line-height: 1.7;
      margin-bottom: 20px;
    }

    .reviewer-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f0fbf6;
      padding-top: 16px;
    }

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

    .reviewer-info h5 {
      font-size: 0.95rem;
      margin-bottom: 2px;
    }

    .reviewer-info span {
      font-size: 0.82rem;
      color: var(--text-muted);
    }

    /* FAQ 手风琴 */
    .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: all 0.25s ease;
    }

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

    .faq-question {
      padding: 20px 24px;
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.2s ease;
    }

    .faq-item.active .faq-question::after {
      content: "-";
      transform: rotate(180deg);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 22px 24px;
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

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

    /* 需求提交与联系我们 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 40px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 20px;
    }

    .form-group label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      font-size: 0.95rem;
      border: 1px solid #ccefe1;
      border-radius: var(--radius-sm);
      background: #fbfefd;
      color: var(--text-main);
      font-family: inherit;
      outline: none;
      transition: border-color 0.25s ease;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #ffffff;
    }

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

    .qr-contact-block {
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      background: #f8fcfa;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--primary-border);
    }

    .qr-box {
      text-align: center;
      margin: 16px 0;
    }

    .qr-box img {
      width: 150px;
      height: 150px;
      border-radius: var(--radius-sm);
      border: 2px solid #ffffff;
      box-shadow: var(--shadow-sm);
    }

    .contact-details-list {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 2;
    }

    .contact-details-list strong {
      color: var(--text-main);
    }

    /* 文章列表 & 友情链接 */
    .article-links-grid {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 16px;
    }

    .article-chip {
      display: inline-flex;
      align-items: center;
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 6px;
      font-size: 0.9rem;
      color: var(--text-main);
    }

    .article-chip:hover {
      border-color: var(--primary);
      color: var(--primary-dark);
      background: #f0fbf6;
    }

    .friend-links-box {
      padding-top: 30px;
      border-top: 1px solid var(--border-color);
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
      align-items: center;
    }

    .friend-links-box a {
      font-size: 0.9rem;
      color: var(--text-muted);
      padding: 4px 10px;
      background: #f0fbf6;
      border-radius: 4px;
    }

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

    /* 页脚 */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 40px 0 28px 0;
      color: var(--text-muted);
      font-size: 0.9rem;
    }

    .footer-inner {
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 20px;
    }

    /* 浮动客服 */
    .float-kefu {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      background: #ffffff;
      border: 1px solid var(--primary-border);
      border-radius: 50px;
      box-shadow: var(--shadow-lg);
      padding: 10px 18px;
      display: flex;
      align-items: center;
      gap: 10px;
      cursor: pointer;
      transition: transform 0.25s ease;
    }

    .float-kefu:hover {
      transform: translateY(-3px);
    }

    .float-badge {
      width: 10px;
      height: 10px;
      border-radius: 50%;
      background: var(--primary);
    }

    .float-text {
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--primary-dark);
    }

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-grid {
        grid-template-columns: 1fr;
      }
      .about-grid {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 76px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 24px;
      }
      .nav-links.show {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 2.1rem;
      }
      .case-gallery {
        grid-template-columns: 1fr;
      }
      .flow-steps {
        grid-template-columns: 1fr;
      }
      .about-features {
        grid-template-columns: 1fr;
      }
    }