/* roulang page: index */
:root {
      --primary: #0D9488;
      --primary-dark: #0F766E;
      --accent: #F59E0B;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.78;
      color: var(--text-body);
      background-color: var(--bg-base);
      -webkit-font-smoothing: antialiased;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
    }
    .hover-lift {
      transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hover-lift:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 30px -4px rgba(13, 148, 136, 0.16);
    }
    .faq-panel {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out;
    }
    .faq-open .faq-panel {
      max-height: 240px;
    }
    .faq-open .faq-icon {
      transform: rotate(180deg);
    }