:root {
      --primary: #d81b60;
      --primary-hover: #c2185b;
      --primary-light: #fce4ec;
      --primary-gradient: linear-gradient(135deg, #e91e63 0%, #c2185b 100%);
      --accent: #ff4081;
      --text-main: #212121;
      --text-muted: #616161;
      --bg-page: #faf9fa;
      --bg-card: #ffffff;
      --border-color: #f1d5e2;
      --shadow-sm: 0 2px 8px rgba(216, 27, 96, 0.06);
      --shadow-md: 0 8px 24px rgba(216, 27, 96, 0.1);
      --shadow-hover: 0 12px 30px rgba(216, 27, 96, 0.16);
      --radius: 12px;
      --container-width: 1200px;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    body {
      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;
      overflow-x: hidden;
    }

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

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

    .container {
      width: 100%;
      max-width: var(--container-width);
      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: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 70px;
    }

    .nav-brand {
      display: flex;
      align-items: center;
      gap: 12px;
      height: 40px;
    }

    .ai-page-logo {
      height: 38px;
      width: auto;
      object-fit: contain;
    }

    .nav-links {
      display: flex;
      align-items: center;
      list-style: none;
      gap: 0;
    }

    .nav-links li a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-main);
      padding: 8px 12px;
      border-radius: 6px;
      transition: background 0.2s, color 0.2s;
    }

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

    .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: 8px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      text-align: center;
    }

    .btn-primary {
      background: var(--primary-gradient);
      color: #ffffff !important;
      box-shadow: 0 4px 14px rgba(216, 27, 96, 0.3);
    }

    .btn-primary:hover {
      background: #c2185b;
      transform: translateY(-2px);
      box-shadow: 0 6px 18px rgba(216, 27, 96, 0.4);
    }

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

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

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

    /* 首屏 Hero (无任何图片) */
    .hero {
      position: relative;
      padding: 80px 0 60px;
      background: radial-gradient(circle at 85% 15%, #ffebee 0%, #faf9fa 60%);
      border-bottom: 1px solid var(--border-color);
      overflow: hidden;
    }

    .hero-content {
      max-width: 860px;
      margin: 0 auto;
      text-align: center;
    }

    .hero-badge {
      display: inline-block;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 20px;
      margin-bottom: 24px;
      border: 1px solid rgba(216, 27, 96, 0.2);
    }

    .hero h1 {
      font-size: 40px;
      line-height: 1.25;
      font-weight: 800;
      color: #1a1a1a;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }

    .hero-desc {
      font-size: 17px;
      line-height: 1.7;
      color: var(--text-muted);
      margin-bottom: 36px;
      max-width: 720px;
      margin-left: auto;
      margin-right: auto;
    }

    .hero-btns {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
    }

    .btn-large {
      padding: 13px 32px;
      font-size: 16px;
      border-radius: 8px;
    }

    .hero-metrics {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      background: #ffffff;
      padding: 24px;
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      border: 1px solid var(--border-color);
    }

    .metric-item {
      text-align: center;
      border-right: 1px solid #f0e6eb;
    }

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

    .metric-number {
      font-size: 26px;
      font-weight: 700;
      color: var(--primary);
      margin-bottom: 4px;
    }

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

    /* 公共区头 */
    .section {
      padding: 70px 0;
    }

    .section-header {
      text-align: center;
      max-width: 760px;
      margin: 0 auto 48px;
    }

    .section-tag {
      font-size: 13px;
      font-weight: 700;
      color: var(--primary);
      text-transform: uppercase;
      letter-spacing: 1px;
      margin-bottom: 8px;
    }

    .section-title {
      font-size: 28px;
      font-weight: 800;
      color: #1a1a1a;
      margin-bottom: 12px;
    }

    .section-sub {
      font-size: 15px;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* 卡片与网格 */
    .card-grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

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

    .card-grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .feature-card {
      background: var(--bg-card);
      border-radius: var(--radius);
      padding: 28px 24px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
      display: flex;
      flex-direction: column;
    }

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

    .card-icon-pill {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 18px;
      margin-bottom: 16px;
    }

    .feature-card h3 {
      font-size: 17px;
      font-weight: 700;
      color: #1a1a1a;
      margin-bottom: 10px;
    }

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

    /* 平台矩阵 */
    .platforms-wrap {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 28px;
      box-shadow: var(--shadow-sm);
    }

    .platforms-title {
      font-size: 15px;
      font-weight: 700;
      margin-bottom: 16px;
      text-align: center;
      color: var(--text-main);
    }

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

    .plat-tag {
      background: #fdf2f6;
      border: 1px solid #f8bbd0;
      color: #880e4f;
      font-size: 13px;
      font-weight: 500;
      padding: 6px 14px;
      border-radius: 6px;
    }

    /* 横版与方版素材区域 */
    .media-showcase {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

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

    .media-box-img-wrap {
      position: relative;
      background: #eee;
      width: 100%;
      aspect-ratio: 16/9;
      overflow: hidden;
    }

    .media-box-img-square {
      aspect-ratio: 1/1;
    }

    .media-box-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .media-box-content {
      padding: 20px;
    }

    .media-box-content h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 6px;
    }

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

    /* 对比评测 */
    .compare-container {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      box-shadow: var(--shadow-sm);
      overflow-x: auto;
      margin-bottom: 32px;
    }

    .compare-table {
      width: 100%;
      border-collapse: collapse;
      min-width: 680px;
    }

    .compare-table th, .compare-table td {
      padding: 16px 20px;
      text-align: left;
      border-bottom: 1px solid #f4e1eb;
      font-size: 14px;
    }

    .compare-table th {
      background: #fdf5f8;
      font-weight: 700;
      color: var(--text-main);
    }

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

    .rating-banner {
      background: var(--primary-gradient);
      color: #ffffff;
      border-radius: var(--radius);
      padding: 24px 32px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      box-shadow: var(--shadow-md);
    }

    .rating-score {
      font-size: 36px;
      font-weight: 900;
      line-height: 1;
    }

    .rating-stars {
      color: #ffd54f;
      font-size: 20px;
      margin-top: 4px;
    }

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

    .process-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      position: relative;
    }

    .process-step {
      font-size: 22px;
      font-weight: 900;
      color: var(--primary);
      opacity: 0.3;
      margin-bottom: 8px;
    }

    .process-card h4 {
      font-size: 16px;
      font-weight: 700;
      margin-bottom: 8px;
    }

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

    /* FAQ 手风琴 */
    .faq-list {
      max-width: 860px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      transition: border-color 0.2s;
    }

    .faq-question {
      padding: 16px 20px;
      font-size: 15px;
      font-weight: 600;
      color: var(--text-main);
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
      user-select: none;
    }

    .faq-question::after {
      content: "+";
      font-size: 18px;
      color: var(--primary);
      transition: transform 0.2s;
    }

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

    .faq-answer {
      display: none;
      padding: 0 20px 16px;
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.6;
    }

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

    /* 客户评论卡片 */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }

    .testimonial-text {
      font-size: 14px;
      color: #333333;
      line-height: 1.6;
      margin-bottom: 16px;
      position: relative;
    }

    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      border-top: 1px dashed #f0e0e8;
      padding-top: 14px;
    }

    .user-avatar-tag {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 14px;
    }

    .user-info-name {
      font-size: 14px;
      font-weight: 700;
      color: var(--text-main);
    }

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

    /* 需求表单与联系 */
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 32px;
      align-items: flex-start;
    }

    .form-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 32px;
      box-shadow: var(--shadow-sm);
    }

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

    .form-label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 6px;
      color: var(--text-main);
    }

    .form-control {
      width: 100%;
      padding: 10px 14px;
      border: 1px solid #dcd1d7;
      border-radius: 6px;
      font-size: 14px;
      outline: none;
      transition: border-color 0.2s;
    }

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

    textarea.form-control {
      resize: vertical;
      min-height: 90px;
    }

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

    .contact-info-card h4 {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 16px;
    }

    .contact-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
      font-size: 14px;
      margin-bottom: 24px;
    }

    .qr-block {
      display: flex;
      gap: 20px;
      align-items: center;
      background: #faf4f7;
      padding: 16px;
      border-radius: 8px;
      border: 1px dashed var(--border-color);
    }

    .qr-img {
      width: 90px;
      height: 90px;
      background: #fff;
      padding: 4px;
      border-radius: 6px;
      border: 1px solid #e0d0d8;
    }

    .qr-img img {
      width: 100%;
      height: 100%;
      object-fit: contain;
    }

    /* 行业资讯与文章 */
    .article-list-wrap {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }

    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius);
      padding: 20px;
      transition: border-color 0.2s;
    }

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

    .article-item h4 {
      font-size: 15px;
      font-weight: 600;
      margin-bottom: 8px;
      line-height: 1.4;
    }

    .article-item a {
      font-size: 13px;
      color: var(--primary);
      font-weight: 500;
    }

    /* 宣传图画廊 */
    .banner-gallery {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 24px;
      margin-top: 36px;
    }

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

    /* 友情链接与页脚 */
    .footer {
      background: #211c20;
      color: #cfc2c9;
      padding: 48px 0 24px;
      border-top: 3px solid var(--primary);
    }

    .footer-top {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 32px;
      padding-bottom: 32px;
      border-bottom: 1px solid #362f34;
    }

    .footer-col h5 {
      font-size: 15px;
      font-weight: 700;
      color: #ffffff;
      margin-bottom: 16px;
    }

    .footer-col p {
      font-size: 13px;
      line-height: 1.6;
      color: #a89aa2;
      margin-bottom: 12px;
    }

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

    .footer-links li a {
      font-size: 13px;
      color: #b8a9b2;
    }

    .footer-links li a:hover {
      color: #ffffff;
    }

    .friend-links-area {
      padding: 20px 0;
      border-bottom: 1px solid #362f34;
      font-size: 13px;
    }

    .friend-links-area span {
      color: #ffffff;
      font-weight: 600;
      margin-right: 12px;
    }

    .friend-links-area a {
      color: #a89aa2;
      margin-right: 16px;
      display: inline-block;
    }

    .friend-links-area a:hover {
      color: var(--accent);
    }

    .footer-bottom {
      padding-top: 20px;
      text-align: center;
      font-size: 12px;
      color: #8c7e86;
    }

    /* 浮动客服 */
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 40px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-gradient);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 12px rgba(216, 27, 96, 0.4);
      cursor: pointer;
      font-size: 18px;
      transition: transform 0.2s;
    }

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

    /* 响应式调整 */
    @media (max-width: 992px) {
      .card-grid-4 {
        grid-template-columns: repeat(2, 1fr);
      }
      .card-grid-3 {
        grid-template-columns: repeat(2, 1fr);
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .media-showcase {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr 1fr;
      }
      .article-list-wrap {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #ffffff;
        padding: 20px;
        box-shadow: var(--shadow-md);
        border-bottom: 1px solid var(--border-color);
      }
      .nav-links.active {
        display: flex;
      }
      .nav-toggle {
        display: block;
      }
      .hero h1 {
        font-size: 28px;
      }
      .hero-desc {
        font-size: 15px;
      }
      .hero-metrics {
        grid-template-columns: repeat(2, 1fr);
      }
      .metric-item:nth-child(2) {
        border-right: none;
      }
      .card-grid-3, .card-grid-2, .article-list-wrap, .banner-gallery {
        grid-template-columns: 1fr;
      }
      .contact-grid {
        grid-template-columns: 1fr;
      }
      .footer-top {
        grid-template-columns: 1fr;
      }
      .rating-banner {
        flex-direction: column;
        text-align: center;
        gap: 16px;
      }
    }