:root {
      --primary-yellow: #f59e0b;
      --primary-bright: #fbbf24;
      --primary-dark: #d97706;
      --bg-cream: #fffdfa;
      --bg-surface: #ffffff;
      --bg-soft: #fef3c7;
      --bg-subtle: #fafaf9;
      --text-main: #1c1917;
      --text-muted: #57534e;
      --text-subtle: #78716c;
      --border-color: #fde68a;
      --border-card: #f3f4f6;
      --shadow-sm: 0 2px 8px rgba(245, 158, 11, 0.08);
      --shadow-md: 0 8px 24px rgba(217, 119, 6, 0.12);
      --shadow-lg: 0 16px 36px rgba(217, 119, 6, 0.16);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --max-width: 1200px;
      --transition: all 0.28s ease-in-out;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-cream);
      color: var(--text-main);
      line-height: 1.65;
      font-size: 16px;
      overflow-x: hidden;
    }

    a {
      color: inherit;
      text-decoration: none;
    }

    ul, ol {
      list-style: none;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 2px solid var(--border-color);
      box-shadow: 0 2px 10px 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;
    }

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

    .brand-title {
      font-size: 20px;
      font-weight: 800;
      color: #92400e;
      letter-spacing: -0.5px;
    }

    .nav-menu-wrapper {
      display: flex;
      align-items: center;
    }

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

    .nav-links a {
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: var(--radius-sm);
      transition: var(--transition);
      white-space: nowrap;
    }

    .nav-links a:hover {
      background-color: var(--bg-soft);
      color: var(--primary-dark);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-left: 12px;
    }

    .btn-header-cta {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #f59e0b, #d97706);
      color: #ffffff;
      font-weight: 700;
      font-size: 14px;
      padding: 9px 18px;
      border-radius: 50px;
      box-shadow: 0 4px 12px rgba(245, 158, 11, 0.35);
      transition: var(--transition);
    }

    .btn-header-cta:hover {
      transform: translateY(-1px);
      box-shadow: 0 6px 16px rgba(217, 119, 6, 0.45);
      background: linear-gradient(135deg, #fbbf24, #d97706);
    }

    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* 区域通用样式 */
    section {
      padding: 72px 0;
      position: relative;
    }

    .section-alt {
      background: linear-gradient(180deg, #ffffff 0%, #fffdf5 100%);
      border-top: 1px solid #fef3c7;
      border-bottom: 1px solid #fef3c7;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px auto;
    }

    .badge-tag {
      display: inline-block;
      background: var(--bg-soft);
      color: #b45309;
      font-weight: 700;
      font-size: 13px;
      padding: 4px 14px;
      border-radius: 50px;
      margin-bottom: 12px;
      border: 1px solid var(--border-color);
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: #292524;
      line-height: 1.35;
      margin-bottom: 14px;
    }

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

    /* Hero 纯净无图首屏 */
    .hero-section {
      padding: 80px 0 60px 0;
      background: radial-gradient(circle at 50% 10%, #fffbeb 0%, #fffdfa 70%);
      position: relative;
      overflow: hidden;
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fef3c7;
      border: 1px solid #fde68a;
      padding: 6px 18px;
      border-radius: 50px;
      font-size: 14px;
      font-weight: 700;
      color: #92400e;
      margin-bottom: 24px;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: #1c1917;
      line-height: 1.25;
      letter-spacing: -1px;
      margin-bottom: 20px;
    }

    .hero-title span {
      background: linear-gradient(135deg, #d97706, #b45309);
      -webkit-background-clip: text;
      -webkit-text-fill-color: #b45309;
    }

    .hero-subtitle {
      font-size: 18px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 36px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 44px;
    }

    .btn-main-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: linear-gradient(135deg, #f59e0b, #d97706);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 34px;
      border-radius: 50px;
      box-shadow: 0 10px 24px rgba(245, 158, 11, 0.4);
      transition: var(--transition);
    }

    .btn-main-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 14px 28px rgba(217, 119, 6, 0.5);
      background: linear-gradient(135deg, #fbbf24, #d97706);
    }

    .btn-main-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      background: #ffffff;
      color: #78350f;
      border: 2px solid #fde68a;
      font-size: 16px;
      font-weight: 700;
      padding: 12px 30px;
      border-radius: 50px;
      transition: var(--transition);
    }

    .btn-main-secondary:hover {
      background: #fef3c7;
      border-color: #f59e0b;
    }

    .hero-stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 30px;
    }

    .stat-card {
      background: #ffffff;
      border: 1px solid #fef3c7;
      border-radius: var(--radius-md);
      padding: 20px 14px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

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

    .stat-val {
      font-size: 28px;
      font-weight: 900;
      color: #b45309;
      line-height: 1.2;
      margin-bottom: 4px;
    }

    .stat-label {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-subtle);
    }

    /* 平台能力与服务矩阵 */
    .grid-cards {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(270px, 1fr));
      gap: 20px;
    }

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

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

    .feature-icon-bar {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: #fef3c7;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: #d97706;
      font-weight: 900;
      margin-bottom: 16px;
    }

    .feature-box h3 {
      font-size: 18px;
      font-weight: 700;
      color: #1c1917;
      margin-bottom: 10px;
    }

    .feature-box p {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 支持模型标签云 */
    .model-tags-container {
      background: #ffffff;
      border: 1px solid #fde68a;
      border-radius: var(--radius-lg);
      padding: 28px;
      text-align: center;
      box-shadow: var(--shadow-sm);
      margin-top: 36px;
    }

    .model-tags-title {
      font-size: 16px;
      font-weight: 700;
      color: #92400e;
      margin-bottom: 18px;
    }

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

    .model-tag {
      background: #fffbeb;
      border: 1px solid #fef3c7;
      color: #78350f;
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 20px;
      transition: var(--transition);
    }

    .model-tag:hover {
      background: #fde68a;
      transform: scale(1.04);
    }

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

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

    .step-num {
      font-size: 32px;
      font-weight: 900;
      color: #fde68a;
      line-height: 1;
      margin-bottom: 12px;
    }

    .step-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: #1c1917;
      margin-bottom: 8px;
    }

    .step-card p {
      font-size: 13px;
      color: var(--text-muted);
    }

    /* 案例展示 */
    .media-gallery-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
      margin-top: 30px;
    }

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

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

    .gallery-img-box {
      width: 100%;
      background: #f5f5f4;
      overflow: hidden;
    }

    .gallery-info {
      padding: 18px;
    }

    .gallery-info h4 {
      font-size: 16px;
      font-weight: 700;
      color: #1c1917;
      margin-bottom: 6px;
    }

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

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

    .banner-item {
      border-radius: var(--radius-sm);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-card);
    }

    /* 对比评测表格 */
    .eval-overview-card {
      background: linear-gradient(135deg, #fffbeb, #ffffff);
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-box {
      display: flex;
      align-items: center;
      gap: 20px;
    }

    .score-big {
      font-size: 48px;
      font-weight: 900;
      color: #b45309;
      line-height: 1;
    }

    .score-detail h3 {
      font-size: 18px;
      font-weight: 800;
      color: #78350f;
    }

    .score-stars {
      color: #f59e0b;
      font-size: 20px;
      margin-top: 4px;
    }

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

    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 14px;
    }

    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid #f3f4f6;
    }

    .comparison-table th {
      background: #fffdf5;
      font-weight: 700;
      color: #92400e;
    }

    .comparison-table tr:hover td {
      background: #fefce8;
    }

    .highlight-cell {
      font-weight: 700;
      color: #d97706;
    }

    /* 需求匹配与表单 */
    .form-wrapper-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-md);
      max-width: 800px;
      margin: 0 auto;
    }

    .form-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 20px;
    }

    .form-group-full {
      grid-column: span 2;
    }

    .form-group label {
      display: block;
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid #d6d3d1;
      border-radius: var(--radius-sm);
      font-size: 14px;
      color: var(--text-main);
      background: #fafaf9;
      outline: none;
      transition: var(--transition);
    }

    .form-control:focus {
      border-color: var(--primary-yellow);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.15);
    }

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

    .btn-submit-form {
      width: 100%;
      background: linear-gradient(135deg, #f59e0b, #d97706);
      color: #ffffff;
      font-size: 16px;
      font-weight: 700;
      padding: 14px;
      border: none;
      border-radius: var(--radius-sm);
      cursor: pointer;
      box-shadow: 0 4px 14px rgba(245, 158, 11, 0.35);
      transition: var(--transition);
    }

    .btn-submit-form:hover {
      background: linear-gradient(135deg, #fbbf24, #d97706);
      transform: translateY(-1px);
      box-shadow: 0 6px 18px rgba(217, 119, 6, 0.45);
    }

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

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

    .review-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      margin-bottom: 14px;
    }

    .reviewer-info h4 {
      font-size: 15px;
      font-weight: 700;
      color: #1c1917;
    }

    .reviewer-info span {
      font-size: 12px;
      color: var(--text-subtle);
    }

    .review-stars {
      color: #f59e0b;
      font-size: 14px;
    }

    .review-body {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* FAQ 折叠面板 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

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

    .faq-question {
      padding: 18px 24px;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 16px;
      font-weight: 700;
      color: #292524;
      background: #ffffff;
      user-select: none;
    }

    .faq-question:hover {
      background: #fffdfa;
      color: #b45309;
    }

    .faq-toggle-icon {
      font-size: 20px;
      color: #d97706;
      transition: transform 0.25s ease;
    }

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

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out;
      background: #fafaf9;
      border-top: 1px solid transparent;
    }

    .faq-item.active .faq-answer {
      max-height: 250px;
      border-top-color: #f3f4f6;
    }

    .faq-answer-inner {
      padding: 16px 24px 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 文章与资讯 */
    .news-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 16px;
      margin-top: 20px;
    }

    .news-card-link {
      display: block;
      background: #ffffff;
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 18px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .news-card-link:hover {
      border-color: var(--border-color);
      transform: translateY(-2px);
      box-shadow: var(--shadow-md);
    }

    .news-tag {
      font-size: 12px;
      font-weight: 700;
      color: #b45309;
      background: #fef3c7;
      padding: 2px 8px;
      border-radius: 4px;
      display: inline-block;
      margin-bottom: 8px;
    }

    .news-title {
      font-size: 14.5px;
      font-weight: 700;
      color: #1c1917;
      margin-bottom: 6px;
    }

    .news-url {
      font-size: 12px;
      color: var(--text-subtle);
      word-break: break-all;
    }

    /* 代理加盟 */
    .agent-box {
      background: linear-gradient(135deg, #fffbeb 0%, #fef3c7 100%);
      border: 2px solid #fde68a;
      border-radius: var(--radius-lg);
      padding: 40px;
      text-align: center;
      box-shadow: var(--shadow-md);
    }

    .agent-box h3 {
      font-size: 26px;
      font-weight: 800;
      color: #78350f;
      margin-bottom: 12px;
    }

    .agent-box p {
      font-size: 15px;
      color: #92400e;
      max-width: 700px;
      margin: 0 auto 24px auto;
    }

    /* 悬浮客服与返回顶部 */
    .floating-bar {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 2px solid #fde68a;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: var(--shadow-md);
      cursor: pointer;
      font-size: 18px;
      color: #d97706;
      transition: var(--transition);
      position: relative;
    }

    .float-btn:hover {
      background: #f59e0b;
      color: #ffffff;
      transform: scale(1.08);
    }

    .qr-popup {
      position: absolute;
      right: 58px;
      bottom: 0;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 12px;
      box-shadow: var(--shadow-lg);
      display: none;
      width: 140px;
      text-align: center;
    }

    .qr-popup p {
      font-size: 12px;
      color: var(--text-main);
      font-weight: 700;
      margin-top: 6px;
    }

    .float-btn-qr:hover .qr-popup {
      display: block;
    }

    /* 页脚 */
    .site-footer {
      background: #1c1917;
      color: #d6d3d1;
      padding: 56px 0 28px 0;
      border-top: 4px solid var(--primary-yellow);
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.5fr;
      gap: 36px;
      margin-bottom: 40px;
    }

    .footer-col h4 {
      font-size: 16px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
      border-left: 3px solid var(--primary-yellow);
      padding-left: 8px;
    }

    .footer-col p {
      font-size: 13.5px;
      line-height: 1.8;
      color: #a8a29e;
    }

    .footer-links li {
      margin-bottom: 8px;
    }

    .footer-links a {
      font-size: 13.5px;
      color: #a8a29e;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--primary-bright);
      padding-left: 4px;
    }

    .friend-links-area {
      border-top: 1px solid #292524;
      padding-top: 24px;
      margin-bottom: 24px;
    }

    .friend-links-title {
      font-size: 13px;
      font-weight: 700;
      color: #78716c;
      margin-bottom: 12px;
    }

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

    .friend-links-flex a {
      font-size: 13px;
      color: #a8a29e;
      transition: var(--transition);
    }

    .friend-links-flex a:hover {
      color: var(--primary-bright);
    }

    .footer-bottom {
      border-top: 1px solid #292524;
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #78716c;
    }

    .footer-bottom a {
      color: var(--primary-bright);
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .nav-links {
        display: none;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .nav-menu-wrapper.open .nav-links {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 16px 20px;
        border-bottom: 2px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
      }
      .nav-menu-wrapper.open .nav-links a {
        width: 100%;
        padding: 10px 0;
      }
      .hero-title {
        font-size: 32px;
      }
      .hero-stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .reviews-grid {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .banner-stream {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 640px) {
      .hero-title {
        font-size: 26px;
      }
      .hero-subtitle {
        font-size: 15px;
      }
      .section-title {
        font-size: 24px;
      }
      .form-grid {
        grid-template-columns: 1fr;
      }
      .form-group-full {
        grid-column: span 1;
      }
      .media-gallery-grid {
        grid-template-columns: 1fr;
      }
      .banner-stream {
        grid-template-columns: 1fr;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
      .eval-overview-card {
        flex-direction: column;
        text-align: center;
      }
      .eval-score-box {
        flex-direction: column;
      }
    }