:root {
      --primary: #E91E63;
      --primary-dark: #C2185B;
      --primary-light: #FCE4EC;
      --accent: #FF4081;
      --accent-soft: #FFF0F5;
      --text-main: #212121;
      --text-muted: #616161;
      --bg-page: #FAF9FA;
      --bg-card: #FFFFFF;
      --border-color: #F8BBD0;
      --shadow-sm: 0 2px 8px rgba(233, 30, 99, 0.06);
      --shadow-md: 0 6px 20px rgba(233, 30, 99, 0.1);
      --shadow-lg: 0 12px 30px rgba(233, 30, 99, 0.15);
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --transition: all 0.28s ease;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      line-height: 1.6;
      font-size: 15px;
      overflow-x: hidden;
    }

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

    ul, ol {
      list-style: none;
    }

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

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

    /* 顶部导航 */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }

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

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

    .logo-container .ai-page-logo {
      height: 42px;
      width: auto;
    }

    .logo-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--primary-dark);
      letter-spacing: -0.5px;
    }

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

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

    .nav-links li a {
      padding: 8px 14px;
      font-weight: 500;
      color: var(--text-main);
      border-radius: var(--radius-sm);
      display: inline-block;
    }

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

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

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 9px 20px;
      font-size: 14px;
      font-weight: 600;
      border-radius: 50px;
      cursor: pointer;
      border: 1px solid transparent;
      transition: var(--transition);
      text-align: center;
    }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent) 0%, var(--primary) 100%);
      color: #FFFFFF !important;
      box-shadow: 0 4px 12px rgba(233, 30, 99, 0.28);
    }

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(233, 30, 99, 0.38);
    }

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

    .btn-outline:hover {
      background-color: var(--accent-soft);
      transform: translateY(-2px);
    }

    .menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 24px;
      color: var(--primary-dark);
      cursor: pointer;
    }

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

    .section-bg-alt {
      background-color: var(--accent-soft);
    }

    .section-title-wrap {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 46px;
    }

    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      background-color: var(--primary-light);
      color: var(--primary-dark);
      font-size: 12px;
      font-weight: 700;
      border-radius: 30px;
      margin-bottom: 12px;
      text-transform: uppercase;
      letter-spacing: 1px;
    }

    .section-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.3;
    }

    .section-desc {
      font-size: 16px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* 首屏 Hero */
    .hero-section {
      background: radial-gradient(circle at 85% 15%, rgba(255, 64, 129, 0.12), transparent 45%),
                  radial-gradient(circle at 10% 80%, rgba(233, 30, 99, 0.08), transparent 40%),
                  linear-gradient(180deg, #FFFFFF 0%, #FFF5F8 100%);
      padding: 85px 0 65px;
      border-bottom: 1px solid var(--border-color);
    }

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

    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #FFFFFF;
      padding: 6px 18px;
      border-radius: 50px;
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
      color: var(--primary-dark);
      font-weight: 600;
      font-size: 13px;
      margin-bottom: 22px;
    }

    .hero-title {
      font-size: 42px;
      font-weight: 900;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-title span {
      color: var(--primary);
    }

    .hero-intro {
      font-size: 18px;
      color: var(--text-muted);
      margin-bottom: 34px;
      line-height: 1.8;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-cta-group {
      display: flex;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 48px;
    }

    .hero-cta-group .btn-lg {
      padding: 14px 34px;
      font-size: 16px;
    }

    .hero-stats {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--shadow-md);
    }

    .stat-item {
      text-align: center;
      border-right: 1px dashed var(--border-color);
    }

    .stat-item:last-child {
      border-right: none;
    }

    .stat-num {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 平台介绍 */
    .about-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px;
      box-shadow: var(--shadow-sm);
    }

    .about-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 24px;
      margin-top: 30px;
    }

    .about-feature {
      padding: 22px;
      background: var(--accent-soft);
      border-radius: var(--radius-md);
      border-left: 4px solid var(--primary);
    }

    .about-feature h3 {
      font-size: 17px;
      color: var(--text-main);
      margin-bottom: 8px;
    }

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

    /* 模型矩阵徽章 */
    .model-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 24px;
    }

    .model-tag {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      color: var(--text-main);
      padding: 6px 14px;
      border-radius: 30px;
      font-size: 13px;
      font-weight: 500;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .model-tag:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
    }

    /* 场景卡片网格 */
    .scene-grid {
      display: grid;
      grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
      gap: 24px;
    }

    .scene-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 26px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }

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

    .scene-badge {
      align-self: flex-start;
      font-size: 12px;
      color: var(--primary);
      background: var(--primary-light);
      padding: 3px 10px;
      border-radius: 20px;
      margin-bottom: 12px;
      font-weight: 600;
    }

    .scene-card h3 {
      font-size: 18px;
      color: var(--text-main);
      margin-bottom: 10px;
    }

    .scene-card p {
      color: var(--text-muted);
      font-size: 14px;
      line-height: 1.6;
      flex-grow: 1;
    }

    /* 流程步骤 */
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
      gap: 20px;
      position: relative;
    }

    .process-step {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      text-align: center;
      position: relative;
    }

    .step-badge {
      width: 44px;
      height: 44px;
      margin: 0 auto 16px;
      background: linear-gradient(135deg, var(--accent), var(--primary));
      color: #FFFFFF;
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
    }

    .process-step h3 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 8px;
    }

    .process-step p {
      font-size: 13px;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* 案例图片展示区 */
    .media-showcase {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 20px;
      margin-top: 24px;
    }

    .media-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
    }

    .media-img-wrap {
      width: 100%;
      height: 220px;
      background: #FFF0F5;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: var(--transition);
    }

    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }

    .media-info {
      padding: 16px 20px;
    }

    .media-info h4 {
      font-size: 16px;
      color: var(--text-main);
      margin-bottom: 6px;
    }

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

    /* 对比评测 */
    .eval-box {
      background: #FFFFFF;
      border: 2px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-md);
    }

    .eval-score-banner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      background: linear-gradient(90deg, #FFF0F5 0%, #FFFFFF 100%);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px 28px;
      margin-bottom: 30px;
      gap: 16px;
    }

    .eval-score-num {
      font-size: 38px;
      font-weight: 900;
      color: var(--primary);
    }

    .eval-score-desc {
      font-size: 14px;
      color: var(--text-muted);
    }

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

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

    .eval-table th, .eval-table td {
      padding: 14px 18px;
      border-bottom: 1px solid var(--border-color);
      font-size: 14px;
    }

    .eval-table th {
      background-color: var(--accent-soft);
      color: var(--primary-dark);
      font-weight: 700;
    }

    .eval-table tr:hover td {
      background-color: #FFF9FB;
    }

    .highlight-col {
      color: var(--primary);
      font-weight: 700;
      background-color: rgba(233, 30, 99, 0.03);
    }

    /* 用户评论 */
    .review-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
      gap: 24px;
    }

    .review-card {
      background: #FFFFFF;
      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-rating {
      color: #FFB300;
      font-size: 14px;
      margin-bottom: 12px;
    }

    .review-content {
      color: var(--text-main);
      font-size: 14px;
      line-height: 1.7;
      margin-bottom: 18px;
      font-style: italic;
    }

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

    .user-avatar {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary-dark);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 16px;
    }

    .user-meta h4 {
      font-size: 14px;
      color: var(--text-main);
    }

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

    /* 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-color);
      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-weight: 600;
      color: var(--text-main);
      background: #FFFFFF;
      user-select: none;
    }

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

    .faq-icon {
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
      transition: var(--transition);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease;
      background-color: var(--accent-soft);
    }

    .faq-answer-inner {
      padding: 18px 24px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.7;
    }

    .faq-item.active .faq-answer {
      max-height: 300px;
    }

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

    /* 需求匹配与联系我们表单 */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 40px;
      align-items: start;
    }

    .contact-info-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

    .info-list {
      margin-top: 24px;
      display: flex;
      flex-direction: column;
      gap: 16px;
    }

    .info-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
    }

    .info-label {
      font-weight: 600;
      color: var(--primary-dark);
      min-width: 90px;
    }

    .info-val {
      color: var(--text-main);
      word-break: break-all;
    }

    .qr-block {
      margin-top: 24px;
      padding: 16px;
      background: var(--accent-soft);
      border-radius: var(--radius-md);
      text-align: center;
      border: 1px dashed var(--border-color);
    }

    .qr-block img {
      width: 140px;
      height: 140px;
      margin: 0 auto 10px;
      border-radius: var(--radius-sm);
      border: 1px solid var(--border-color);
    }

    .form-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 34px;
      box-shadow: var(--shadow-md);
    }

    .form-group {
      margin-bottom: 18px;
    }

    .form-group label {
      display: block;
      margin-bottom: 8px;
      font-weight: 600;
      color: var(--text-main);
      font-size: 14px;
    }

    .form-control {
      width: 100%;
      padding: 12px 16px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 14px;
      outline: none;
      transition: var(--transition);
      background: #FAF9FA;
      color: var(--text-main);
      font-family: inherit;
    }

    .form-control:focus {
      border-color: var(--primary);
      background: #FFFFFF;
      box-shadow: 0 0 0 3px rgba(233, 30, 99, 0.12);
    }

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

    /* 资讯与文章 */
    .article-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
      gap: 20px;
    }

    .article-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }

    .article-item:hover {
      border-color: var(--primary);
      transform: translateY(-3px);
    }

    .article-item a {
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      line-height: 1.5;
    }

    .article-item a:hover {
      color: var(--primary);
    }

    /* 页脚 */
    .site-footer {
      background: #1F181B;
      color: #ECE5E8;
      padding: 50px 0 26px;
      border-top: 3px solid var(--primary);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      gap: 40px;
      padding-bottom: 36px;
      border-bottom: 1px solid #382B32;
    }

    .footer-brand h3 {
      font-size: 22px;
      color: #FFFFFF;
      margin-bottom: 14px;
    }

    .footer-brand p {
      color: #B5A8B0;
      font-size: 14px;
      line-height: 1.7;
      max-width: 440px;
    }

    .footer-col h4 {
      font-size: 16px;
      color: #FFFFFF;
      margin-bottom: 16px;
      border-left: 3px solid var(--accent);
      padding-left: 8px;
    }

    .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-col ul li a {
      color: #B5A8B0;
      font-size: 13px;
    }

    .footer-col ul li a:hover {
      color: var(--accent);
    }

    .friend-links-wrap {
      margin-top: 26px;
      padding-top: 20px;
      border-top: 1px dashed #382B32;
    }

    .friend-links-title {
      font-size: 13px;
      font-weight: 700;
      color: #E0D3DA;
      margin-bottom: 10px;
    }

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

    .friend-links-list a {
      color: #9C8C96;
      font-size: 12px;
    }

    .friend-links-list a:hover {
      color: #FFFFFF;
    }

    .footer-bottom {
      margin-top: 26px;
      text-align: center;
      font-size: 12px;
      color: #8C7C86;
    }

    /* 悬浮客服与返回顶部 */
    .floating-tools {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 990;
      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 12px rgba(233, 30, 99, 0.4);
      cursor: pointer;
      transition: var(--transition);
      border: none;
      font-size: 18px;
      text-decoration: none;
    }

    .float-btn:hover {
      background: var(--primary-dark);
      transform: scale(1.08);
      color: #FFFFFF;
    }

    .float-qr-popup {
      position: absolute;
      right: 60px;
      bottom: 50px;
      background: #FFFFFF;
      padding: 12px;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-lg);
      border: 1px solid var(--border-color);
      display: none;
      width: 140px;
      text-align: center;
    }

    .float-qr-popup p {
      font-size: 11px;
      color: var(--text-main);
      margin-top: 4px;
    }

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

    /* 响应式调整 */
    @media (max-width: 992px) {
      .hero-title {
        font-size: 32px;
      }
      .hero-stats {
        grid-template-columns: repeat(2, 1fr);
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .menu-toggle {
        display: block;
      }
      .nav-menu {
        position: absolute;
        top: 72px;
        left: 0;
        width: 100%;
        background: #FFFFFF;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
      }
      .nav-menu.open {
        max-height: 480px;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
        padding: 16px 20px;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .nav-actions {
        display: none;
      }
      .hero-stats {
        grid-template-columns: 1fr;
      }
      .stat-item {
        border-right: none;
        border-bottom: 1px dashed var(--border-color);
        padding-bottom: 12px;
      }
      .stat-item:last-child {
        border-bottom: none;
        padding-bottom: 0;
      }
      .scene-grid, .review-grid {
        grid-template-columns: 1fr;
      }
    }