:root {
      --primary: #c9182b;
      --primary-hover: #a81323;
      --primary-light: #fff1f2;
      --secondary: #e63946;
      --accent: #ff4d4f;
      --text-main: #1f2429;
      --text-muted: #586069;
      --bg-page: #fcfbfa;
      --bg-surface: #ffffff;
      --border-color: #f3d4d6;
      --shadow-sm: 0 2px 8px rgba(201, 24, 43, 0.06);
      --shadow-md: 0 8px 24px rgba(201, 24, 43, 0.08);
      --radius-sm: 6px;
      --radius-md: 10px;
      --radius-lg: 16px;
      --transition: all 0.25s ease-in-out;
    }

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

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
    }

    body {
      overflow-x: hidden;
      background: linear-gradient(180deg, #fff5f5 0%, #ffffff 400px, #fdfbfb 100%);
    }

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

    ul, ol {
      list-style: none;
    }

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

    /* 顶部导航 */
    .header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background-color: rgba(255, 255, 255, 0.96);
      backdrop-filter: blur(8px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: 0 1px 10px rgba(0,0,0,0.03);
    }

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

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

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

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

    .nav-item {
      display: inline-block;
      padding: 10px 14px;
      font-size: 15px;
      font-weight: 500;
      color: #333333;
    }

    .nav-item:hover, .ai-page-home-link:hover {
      color: var(--primary);
    }

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

    .btn-header {
      padding: 8px 18px;
      border-radius: var(--radius-sm);
      font-size: 14px;
      font-weight: 600;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
    }

    .btn-primary {
      background-color: var(--primary);
      color: #ffffff !important;
      border: 1px solid var(--primary);
      box-shadow: 0 4px 12px rgba(201, 24, 43, 0.25);
    }

    .btn-primary:hover {
      background-color: var(--primary-hover);
      transform: translateY(-1px);
    }

    .btn-outline {
      background-color: #ffffff;
      color: var(--primary);
      border: 1px solid 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-color: var(--text-main);
      margin: 5px 0;
      transition: var(--transition);
    }

    /* Hero 首屏 - 纯代码几何科技质感，严禁图片 */
    .hero-section {
      padding: 80px 0 60px;
      position: relative;
      background: radial-gradient(circle at 85% 20%, rgba(201, 24, 43, 0.08) 0%, transparent 50%),
                  radial-gradient(circle at 10% 80%, rgba(230, 57, 70, 0.05) 0%, transparent 40%);
    }

    .hero-wrapper {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
    }

    .hero-tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 16px;
      background: var(--primary-light);
      border: 1px solid rgba(201, 24, 43, 0.2);
      border-radius: 30px;
      color: var(--primary);
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 40px;
      line-height: 1.3;
      font-weight: 800;
      color: #14171a;
      max-width: 900px;
      margin-bottom: 20px;
    }

    .hero-desc {
      font-size: 18px;
      color: var(--text-muted);
      max-width: 800px;
      margin-bottom: 36px;
    }

    .hero-btns {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
      margin-bottom: 50px;
    }

    .btn-hero-main {
      padding: 14px 34px;
      font-size: 16px;
      font-weight: bold;
      border-radius: var(--radius-sm);
      background: linear-gradient(135deg, #c9182b 0%, #e63946 100%);
      color: #ffffff;
      box-shadow: 0 8px 20px rgba(201, 24, 43, 0.3);
    }

    .btn-hero-main:hover {
      transform: translateY(-2px);
      box-shadow: 0 12px 24px rgba(201, 24, 43, 0.4);
    }

    .btn-hero-sub {
      padding: 14px 30px;
      font-size: 16px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      background: #ffffff;
      color: var(--primary);
      border: 1px solid var(--primary);
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      width: 100%;
      margin-top: 10px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      text-align: center;
      transition: var(--transition);
    }

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

    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1.2;
      margin-bottom: 6px;
    }

    .stat-label {
      font-size: 14px;
      color: var(--text-muted);
    }

    /* Section 通用规范 */
    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-alt {
      background-color: #faf6f6;
      border-top: 1px solid rgba(201, 24, 43, 0.06);
      border-bottom: 1px solid rgba(201, 24, 43, 0.06);
    }

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

    .section-eyebrow {
      display: inline-block;
      color: var(--primary);
      font-size: 14px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 10px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #14171a;
      margin-bottom: 14px;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
    }

    /* 服务能力卡片 */
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .feature-card {
      background: #ffffff;
      border: 1px solid #f0e6e6;
      border-radius: var(--radius-md);
      padding: 30px 24px;
      transition: var(--transition);
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      height: 100%;
    }

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

    .feature-icon-box {
      width: 48px;
      height: 48px;
      background: var(--primary-light);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 20px;
      color: var(--primary);
      font-weight: bold;
      font-size: 18px;
    }

    .feature-title {
      font-size: 19px;
      font-weight: 700;
      margin-bottom: 12px;
      color: #1a1a1a;
    }

    .feature-text {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
      flex-grow: 1;
    }

    /* 标签矩阵（支持的模型） */
    .tag-cloud-wrapper {
      background: #ffffff;
      padding: 30px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .tag-pill {
      background: #fff5f5;
      color: #8c101c;
      padding: 8px 16px;
      border-radius: 20px;
      font-size: 13px;
      font-weight: 600;
      border: 1px solid #fed7d7;
      transition: var(--transition);
    }

    .tag-pill:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* 对比评测板块 */
    .eval-overview-card {
      background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
      border: 2px solid var(--primary);
      border-radius: var(--radius-lg);
      padding: 36px;
      margin-bottom: 40px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
    }

    .eval-score-badge {
      text-align: center;
      min-width: 220px;
      border-right: 2px dashed #fed7d7;
      padding-right: 30px;
    }

    .eval-score-val {
      font-size: 54px;
      font-weight: 900;
      color: var(--primary);
      line-height: 1;
    }

    .eval-score-full {
      font-size: 18px;
      color: var(--text-muted);
      font-weight: 600;
    }

    .eval-stars {
      color: #f59e0b;
      font-size: 24px;
      margin-top: 8px;
    }

    .eval-summary-text {
      padding-left: 30px;
      flex: 1;
    }

    .eval-summary-text h3 {
      font-size: 22px;
      margin-bottom: 10px;
      color: #1a1a1a;
    }

    .eval-summary-text p {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .table-container {
      width: 100%;
      overflow-x: auto;
      background: #ffffff;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-sm);
      border: 1px solid #f0e6e6;
    }

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

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f0e6e6;
      font-size: 14px;
    }

    .comparison-table th {
      background-color: #fdf5f5;
      color: #222222;
      font-weight: 700;
    }

    .comparison-table tr:hover {
      background-color: #fffafa;
    }

    .highlight-col {
      background-color: rgba(201, 24, 43, 0.03);
      font-weight: 600;
      color: var(--primary);
    }

    /* 流程步骤 */
    .steps-wrapper {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    .step-box {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid #f0e6e6;
      position: relative;
    }

    .step-badge {
      width: 32px;
      height: 32px;
      background: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
      margin-bottom: 16px;
    }

    .step-title {
      font-size: 17px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .step-desc {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 案例展示区（使用指定图片素材） */
    .gallery-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .gallery-card {
      background: #ffffff;
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid #f0e6e6;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .gallery-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
    }

    .gallery-img-wrap {
      width: 100%;
      height: 220px;
      background: #f7f7f7;
      overflow: hidden;
    }

    .gallery-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
      display: block;
    }

    .gallery-card:hover .gallery-img-wrap img {
      transform: scale(1.05);
    }

    .gallery-info {
      padding: 20px;
    }

    .gallery-title {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

    .gallery-desc {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 客户评价卡片 */
    .testimonials-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .testi-card {
      background: #ffffff;
      padding: 26px;
      border-radius: var(--radius-md);
      border: 1px solid #f0e6e6;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testi-body {
      font-size: 14px;
      color: #333333;
      line-height: 1.7;
      margin-bottom: 20px;
      font-style: normal;
    }

    .testi-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid #f7f1f1;
      padding-top: 16px;
    }

    .testi-avatar {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #fee2e2;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 14px;
    }

    .testi-user-name {
      font-size: 15px;
      font-weight: 700;
      color: #1a1a1a;
    }

    .testi-user-role {
      font-size: 12px;
      color: var(--text-muted);
    }

    /* FAQ 展开组件 */
    .faq-wrapper {
      max-width: 900px;
      margin: 0 auto;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid #f0e6e6;
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-header {
      padding: 18px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-size: 16px;
      font-weight: 600;
      color: #222222;
      user-select: none;
    }

    .faq-header:hover {
      color: var(--primary);
    }

    .faq-icon {
      font-size: 18px;
      font-weight: bold;
      color: var(--primary);
      transition: transform 0.25s ease;
    }

    .faq-content {
      padding: 0 24px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.7;
    }

    .faq-item.active .faq-content {
      padding-bottom: 20px;
      max-height: 200px;
    }

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

    /* 需求匹配与表单 */
    .form-section-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      background: #ffffff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
      overflow: hidden;
    }

    .form-intro {
      background: linear-gradient(145deg, #a81323 0%, #c9182b 100%);
      color: #ffffff;
      padding: 48px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .form-intro h3 {
      font-size: 28px;
      font-weight: 800;
      margin-bottom: 16px;
      color: #ffffff;
    }

    .form-intro p {
      font-size: 15px;
      opacity: 0.9;
      line-height: 1.7;
      margin-bottom: 30px;
    }

    .form-contact-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
      font-size: 14px;
    }

    .form-container {
      padding: 48px;
    }

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

    .form-label {
      display: block;
      font-size: 14px;
      font-weight: 600;
      margin-bottom: 8px;
      color: #333333;
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #e0d0d0;
      border-radius: var(--radius-sm);
      font-size: 14px;
      transition: var(--transition);
      background-color: #fdfcfc;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary);
      background-color: #ffffff;
      box-shadow: 0 0 0 3px rgba(201, 24, 43, 0.1);
    }

    .form-submit-btn {
      width: 100%;
      padding: 14px;
      background: var(--primary);
      color: #ffffff;
      border: none;
      border-radius: var(--radius-sm);
      font-size: 16px;
      font-weight: 700;
      cursor: pointer;
      box-shadow: 0 4px 12px rgba(201, 24, 43, 0.2);
    }

    .form-submit-btn:hover {
      background: var(--primary-hover);
    }

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

    .article-card {
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius-md);
      border: 1px solid #f0e6e6;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      transition: var(--transition);
    }

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

    .article-tag {
      font-size: 12px;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 10px;
    }

    .article-title {
      font-size: 16px;
      font-weight: 700;
      line-height: 1.5;
      margin-bottom: 12px;
      color: #1a1a1a;
    }

    .article-link {
      font-size: 13px;
      font-weight: 600;
      color: var(--secondary);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* 加盟代理板块 */
    .agent-card-banner {
      background: linear-gradient(135deg, #2b0b0e 0%, #4a1217 100%);
      color: #ffffff;
      border-radius: var(--radius-lg);
      padding: 46px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 30px;
      margin-top: 40px;
    }

    .agent-banner-info h3 {
      font-size: 26px;
      font-weight: 800;
      margin-bottom: 12px;
      color: #ffffff;
    }

    .agent-banner-info p {
      font-size: 15px;
      color: #fed7d7;
      max-width: 640px;
      line-height: 1.6;
    }

    /* 友情链接与底部 */
    .footer {
      background-color: #1c080a;
      color: #e2d9d9;
      padding-top: 60px;
      padding-bottom: 30px;
      border-top: 3px solid var(--primary);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 20px;
      position: relative;
      padding-bottom: 8px;
    }

    .footer-col h4::after {
      content: "";
      position: absolute;
      left: 0;
      bottom: 0;
      width: 24px;
      height: 2px;
      background: var(--primary);
    }

    .footer-text {
      font-size: 14px;
      line-height: 1.8;
      color: #c7bcbc;
      margin-bottom: 16px;
    }

    .footer-links-list li {
      margin-bottom: 10px;
    }

    .footer-links-list a {
      font-size: 14px;
      color: #c7bcbc;
    }

    .footer-links-list a:hover {
      color: #ff6b7a;
      padding-left: 4px;
    }

    .qrcode-box {
      display: flex;
      align-items: center;
      gap: 16px;
    }

    .qrcode-box img {
      width: 90px;
      height: 90px;
      border-radius: var(--radius-sm);
      background: #ffffff;
      padding: 4px;
      display: block;
    }

    .qrcode-tip {
      font-size: 13px;
      line-height: 1.5;
      color: #d1c7c7;
    }

    .friend-links-area {
      border-top: 1px solid #331417;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 14px;
      color: #a89999;
      font-weight: 600;
      margin-bottom: 12px;
    }

    .friend-links-flex {
      display: flex;
      flex-wrap: wrap;
      gap: 16px;
    }

    .friend-links-flex a {
      font-size: 13px;
      color: #b5a8a8;
    }

    .friend-links-flex a:hover {
      color: #ffffff;
    }

    .footer-bottom {
      border-top: 1px solid #291012;
      padding-top: 20px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      color: #8c7d7e;
      flex-wrap: wrap;
      gap: 10px;
    }

    /* 浮动组件与返回顶部 */
    .floating-widget {
      position: fixed;
      right: 20px;
      bottom: 30px;
      display: flex;
      flex-direction: column;
      gap: 12px;
      z-index: 999;
    }

    .float-btn {
      width: 46px;
      height: 46px;
      border-radius: 50%;
      background: #ffffff;
      color: var(--primary);
      box-shadow: 0 4px 14px rgba(0,0,0,0.15);
      border: 1px solid var(--border-color);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      font-weight: bold;
      transition: var(--transition);
      font-size: 13px;
    }

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

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title { font-size: 32px; }
      .grid-3, .steps-wrapper, .gallery-grid, .testimonials-grid, .articles-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-4, .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .form-section-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .eval-overview-card {
        flex-direction: column;
        text-align: center;
        gap: 20px;
      }
      .eval-score-badge {
        border-right: none;
        border-bottom: 2px dashed #fed7d7;
        padding-right: 0;
        padding-bottom: 20px;
        width: 100%;
      }
      .eval-summary-text {
        padding-left: 0;
      }
      .agent-card-banner {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .menu-toggle {
        display: block;
      }
      .hero-title { font-size: 26px; }
      .section-title { font-size: 24px; }
      .grid-3, .grid-4, .steps-wrapper, .gallery-grid, .testimonials-grid, .articles-grid, .hero-stats {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }