/* roulang page: index */
:root {
      --primary-blue: #1d4ed8;
      --primary-dark: #0f172a;
      --accent-orange: #ea580c;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }

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

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

    /* 卡片悬浮升起阴影动效 */
    .industry-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid var(--card-border);
      background-color: #ffffff;
    }
    .industry-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
      border-color: #93c5fd;
    }

    /* 手风琴展开平滑动画 */
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.35s ease-out;
    }
    .faq-answer.open {
      max-height: 240px;
    }

    /* 移动端菜单过渡 */
    #mobileMenuDrawer {
      transition: transform 0.3s ease-in-out;
    }

    /* 表格响应式与斑马线 */
    .comparison-table th, .comparison-table td {
      padding: 16px 20px;
      text-align: left;
    }

    /* 顶部滚动补偿锚点距离 */
    section {
      scroll-margin-top: 80px;
    }