:root {
      --primary-yellow: #FFD000;
      --primary-yellow-hover: #F0C400;
      --accent-black: #111111;
      --text-main: #1E2024;
      --text-muted: #5F6570;
      --text-light: #8E95A3;
      --bg-page: #FAF9F5;
      --bg-white: #FFFFFF;
      --bg-card: #FFFFFF;
      --border-color: #E8E5DA;
      --border-accent: #FFDC33;
      --shadow-sm: 0 4px 12px rgba(17,17,17,0.04);
      --shadow-md: 0 8px 24px rgba(17,17,17,0.08);
      --shadow-hover: 0 12px 32px rgba(255, 208, 0, 0.25);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 22px;
      --transition: all 0.28s ease;
      --container-max: 1200px;
    }

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

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

    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      line-height: 1.6;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

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

    .section-spacing {
      padding: 72px 0;
    }

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

    .badge-pill {
      display: inline-block;
      background: var(--primary-yellow);
      color: var(--accent-black);
      font-size: 0.85rem;
      font-weight: 700;
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--accent-black);
      margin-bottom: 12px;
      line-height: 1.3;
    }

    .section-desc {
      color: var(--text-muted);
      font-size: 1.05rem;
      line-height: 1.6;
    }

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(250, 249, 245, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }

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

    .brand-logo-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      display: block;
    }

    .brand-name-title {
      font-size: 1.3rem;
      font-weight: 800;
      color: var(--accent-black);
      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: 0.95rem;
      font-weight: 600;
      color: var(--text-main);
      border-radius: var(--radius-sm);
    }

    .nav-links li a:hover {
      background-color: rgba(255, 208, 0, 0.2);
      color: var(--accent-black);
    }

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

    .btn-main-action {
      background: var(--primary-yellow);
      color: var(--accent-black);
      font-weight: 700;
      padding: 10px 22px;
      border-radius: var(--radius-md);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border: 1px solid var(--border-accent);
      cursor: pointer;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .btn-main-action:hover {
      background: var(--primary-yellow-hover);
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }

    .mobile-menu-btn {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--accent-black);
    }

    /* Hero 首屏 (无图规范) */
    .hero-section {
      padding: 70px 0 60px;
      position: relative;
      background: radial-gradient(circle at 50% 0%, rgba(255, 208, 0, 0.18) 0%, rgba(250, 249, 245, 0) 70%);
      border-bottom: 1px solid var(--border-color);
    }

    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }

    .hero-h1 {
      font-size: 2.5rem;
      font-weight: 900;
      color: var(--accent-black);
      line-height: 1.25;
      margin: 16px 0 20px;
      letter-spacing: -0.5px;
    }

    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      margin-bottom: 36px;
      line-height: 1.7;
    }

    .hero-btn-group {
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-btn-portal {
      background: var(--primary-yellow);
      color: var(--accent-black);
      font-size: 1.1rem;
      font-weight: 800;
      padding: 14px 34px;
      border-radius: var(--radius-md);
      box-shadow: 0 8px 20px rgba(255, 208, 0, 0.35);
      border: 2px solid #E0B500;
      display: inline-flex;
      align-items: center;
      gap: 8px;
      transition: var(--transition);
    }

    .hero-btn-portal:hover {
      background: #FFE033;
      transform: translateY(-2px);
      box-shadow: 0 12px 28px rgba(255, 208, 0, 0.45);
    }

    .hero-btn-sub {
      background: var(--bg-white);
      color: var(--accent-black);
      font-size: 1.1rem;
      font-weight: 700;
      padding: 14px 28px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

    .hero-btn-sub:hover {
      background: #F4F2EB;
      transform: translateY(-2px);
    }

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

    .metric-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      padding: 24px 16px;
      border-radius: var(--radius-md);
      text-align: center;
      box-shadow: var(--shadow-sm);
    }

    .metric-value {
      font-size: 1.9rem;
      font-weight: 900;
      color: var(--accent-black);
      margin-bottom: 4px;
    }

    .metric-label {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* 平台介绍 */
    .intro-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 36px;
      align-items: center;
    }

    .intro-content p {
      margin-bottom: 18px;
      color: var(--text-muted);
      font-size: 1.02rem;
    }

    .intro-highlights {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
      margin-top: 24px;
    }

    .highlight-item {
      background: var(--bg-white);
      border-left: 4px solid var(--primary-yellow);
      padding: 14px 16px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      box-shadow: var(--shadow-sm);
      border-top: 1px solid var(--border-color);
      border-right: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .highlight-item h4 {
      font-size: 1rem;
      color: var(--accent-black);
      margin-bottom: 4px;
    }

    .highlight-item p {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin: 0;
    }

    .intro-media-card {
      background: var(--bg-white);
      border-radius: var(--radius-lg);
      padding: 16px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-md);
    }

    .intro-media-card img {
      width: 100%;
      height: auto;
      border-radius: var(--radius-md);
      display: block;
    }

    /* 服务能力与场景矩阵 (多卡片流) */
    .services-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .service-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

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

    .service-card-top h3 {
      font-size: 1.25rem;
      font-weight: 800;
      color: var(--accent-black);
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .service-tag {
      background: rgba(255, 208, 0, 0.25);
      color: var(--accent-black);
      font-size: 0.75rem;
      font-weight: 700;
      padding: 2px 8px;
      border-radius: 4px;
    }

    .service-card-top p {
      font-size: 0.95rem;
      color: var(--text-muted);
      line-height: 1.55;
    }

    .service-card-footer {
      margin-top: 18px;
      padding-top: 14px;
      border-top: 1px dashed var(--border-color);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--accent-black);
    }

    /* 支持模型标签云 */
    .model-tags-wrapper {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-top: 36px;
      text-align: center;
    }

    .model-tags-title {
      font-size: 1.15rem;
      font-weight: 800;
      margin-bottom: 20px;
      color: var(--accent-black);
    }

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

    .model-badge {
      background: #F4F2EB;
      color: var(--text-main);
      padding: 7px 14px;
      border-radius: 20px;
      font-size: 0.88rem;
      font-weight: 600;
      border: 1px solid var(--border-color);
      transition: var(--transition);
    }

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

    /* 对比评测版块 */
    .evaluation-section {
      background: #F4F1E6;
      border-top: 1px solid var(--border-color);
      border-bottom: 1px solid var(--border-color);
    }

    .eval-highlight-box {
      background: var(--bg-white);
      border: 2px solid var(--primary-yellow);
      border-radius: var(--radius-lg);
      padding: 28px;
      margin-bottom: 36px;
      display: flex;
      align-items: center;
      justify-content: space-around;
      box-shadow: var(--shadow-sm);
      flex-wrap: wrap;
      gap: 20px;
    }

    .eval-score-item {
      text-align: center;
    }

    .eval-score-num {
      font-size: 3rem;
      font-weight: 900;
      color: var(--accent-black);
      line-height: 1;
    }

    .eval-stars {
      color: #E0B500;
      font-size: 1.4rem;
      margin: 4px 0;
    }

    .eval-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    .compare-table-wrapper {
      overflow-x: auto;
      background: var(--bg-white);
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      font-size: 0.95rem;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
    }

    .compare-table th {
      background: #FAF8F2;
      font-weight: 800;
      color: var(--accent-black);
    }

    .compare-table tr:last-child td {
      border-bottom: none;
    }

    .highlight-col {
      background: rgba(255, 208, 0, 0.08);
      font-weight: 700;
      color: var(--accent-black);
    }

    /* 流程与行业方案 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      margin-top: 36px;
    }

    .step-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
    }

    .step-num {
      width: 36px;
      height: 36px;
      background: var(--primary-yellow);
      color: var(--accent-black);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      margin-bottom: 16px;
    }

    .step-card h4 {
      font-size: 1.1rem;
      margin-bottom: 8px;
      color: var(--accent-black);
    }

    .step-card p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 案例中心图文展示 */
    .case-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .case-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .case-img-holder {
      aspect-ratio: 16 / 9;
      background: #EAE6DB;
      overflow: hidden;
    }

    .case-img-holder img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: var(--transition);
    }

    .case-card:hover .case-img-holder img {
      transform: scale(1.04);
    }

    .case-body {
      padding: 20px;
    }

    .case-body h4 {
      font-size: 1.15rem;
      color: var(--accent-black);
      margin-bottom: 8px;
    }

    .case-body p {
      font-size: 0.9rem;
      color: var(--text-muted);
    }

    /* 用户评论 */
    .reviews-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    .review-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      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: 1.6;
      margin-bottom: 18px;
      position: relative;
    }

    .review-author-box {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px solid var(--border-color);
      padding-top: 14px;
    }

    .review-avatar {
      width: 44px;
      height: 44px;
      background: var(--primary-yellow);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 800;
      color: var(--accent-black);
    }

    .review-name {
      font-weight: 700;
      font-size: 0.95rem;
      color: var(--accent-black);
    }

    .review-role {
      font-size: 0.8rem;
      color: var(--text-muted);
    }

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

    .faq-item {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
    }

    .faq-header {
      padding: 18px 22px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
      font-weight: 700;
      color: var(--accent-black);
      background: var(--bg-white);
      transition: var(--transition);
    }

    .faq-header:hover {
      background: #FAF8F2;
    }

    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.28s ease;
    }

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

    .faq-body {
      padding: 0 22px;
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      color: var(--text-muted);
      font-size: 0.95rem;
      line-height: 1.6;
    }

    .faq-item.active .faq-body {
      padding: 0 22px 18px;
      max-height: 250px;
    }

    /* 需求匹配与表单 */
    .form-section-wrap {
      display: grid;
      grid-template-columns: 1fr 1.1fr;
      gap: 40px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .form-left-info h3 {
      font-size: 1.8rem;
      color: var(--accent-black);
      margin-bottom: 16px;
      line-height: 1.3;
    }

    .form-left-info p {
      color: var(--text-muted);
      margin-bottom: 24px;
    }

    .contact-card-inline {
      background: #FAF8F2;
      border-radius: var(--radius-md);
      padding: 20px;
      margin-top: 20px;
      border: 1px solid var(--border-color);
    }

    .contact-item-row {
      display: flex;
      align-items: center;
      gap: 10px;
      margin-bottom: 10px;
      font-size: 0.95rem;
      color: var(--text-main);
    }

    .contact-item-row:last-child {
      margin-bottom: 0;
    }

    .qrcode-box {
      margin-top: 18px;
      text-align: center;
      display: inline-block;
      background: #FFF;
      padding: 12px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
    }

    .qrcode-box img {
      width: 120px;
      height: 120px;
      display: block;
      margin: 0 auto 6px;
    }

    .custom-form {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .form-group {
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .form-group label {
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent-black);
    }

    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.95rem;
      background: #FAF9F5;
      color: var(--text-main);
      font-family: inherit;
    }

    .form-input:focus, .form-select:focus, .form-textarea:focus {
      outline: none;
      border-color: var(--primary-yellow);
      background: #FFF;
      box-shadow: 0 0 0 3px rgba(255, 208, 0, 0.2);
    }

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

    .submit-btn-portal {
      background: var(--primary-yellow);
      color: var(--accent-black);
      font-size: 1.05rem;
      font-weight: 800;
      padding: 14px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-accent);
      cursor: pointer;
      transition: var(--transition);
      margin-top: 8px;
    }

    .submit-btn-portal:hover {
      background: var(--primary-yellow-hover);
      box-shadow: var(--shadow-hover);
    }

    /* 文章与资讯专区 */
    .articles-box {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      margin-top: 24px;
    }

    .article-links-container {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 14px;
      margin-top: 16px;
    }

    .article-item-link {
      background: #FAF8F2;
      padding: 12px 16px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
      font-size: 0.92rem;
      color: var(--text-main);
      font-weight: 600;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }

    .article-item-link:hover {
      border-color: var(--primary-yellow);
      background: #FFF;
      color: var(--accent-black);
    }

    /* 友情链接与页脚 */
    .site-footer {
      background: #18191C;
      color: #D1D5DB;
      padding: 60px 0 24px;
      border-top: 4px solid var(--primary-yellow);
    }

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

    .footer-col h4 {
      color: #FFF;
      font-size: 1.1rem;
      margin-bottom: 18px;
      font-weight: 700;
    }

    .footer-col p {
      font-size: 0.9rem;
      line-height: 1.6;
      color: #9CA3AF;
      margin-bottom: 12px;
    }

    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .footer-links-list li a {
      color: #9CA3AF;
      font-size: 0.9rem;
    }

    .footer-links-list li a:hover {
      color: var(--primary-yellow);
    }

    .footer-friend-links {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
    }

    .footer-friend-links a {
      background: #24262B;
      color: #D1D5DB;
      padding: 6px 12px;
      border-radius: 4px;
      font-size: 0.85rem;
    }

    .footer-friend-links a:hover {
      background: var(--primary-yellow);
      color: var(--accent-black);
    }

    .footer-bottom {
      border-top: 1px solid #2B2D33;
      padding-top: 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 16px;
      font-size: 0.85rem;
      color: #6B7280;
    }

    /* 悬浮客服面板 */
    .floating-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      background: var(--primary-yellow);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 16px rgba(0,0,0,0.15);
      cursor: pointer;
      color: var(--accent-black);
      font-weight: 800;
      border: 1px solid var(--border-accent);
      transition: var(--transition);
    }

    .float-btn:hover {
      transform: scale(1.08);
      background: #FFE033;
    }

    /* 响应式适配 */
    @media (max-width: 992px) {
      .services-grid, .case-grid, .reviews-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .steps-grid, .hero-metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-top-grid {
        grid-template-columns: 1fr 1fr;
      }
      .form-section-wrap, .intro-grid {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--bg-page);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.show {
        display: flex;
      }
      .mobile-menu-btn {
        display: block;
      }
      .hero-h1 {
        font-size: 1.85rem;
      }
      .services-grid, .case-grid, .reviews-grid, .steps-grid, .hero-metrics-grid {
        grid-template-columns: 1fr;
      }
      .footer-top-grid {
        grid-template-columns: 1fr;
      }
      .article-links-container {
        grid-template-columns: 1fr;
      }
      .intro-highlights {
        grid-template-columns: 1fr;
      }
    }