/* roulang page: index */
:root {
      --brand-teal: #0D3834;
      --brand-dark: #061A18;
      --brand-coral: #FF6B4A;
      --brand-bg: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      color: var(--text-main);
      background-color: var(--brand-bg);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }
    .bento-card {
      background: #FFFFFF;
      border: 1px solid rgba(13, 56, 52, 0.08);
      border-radius: 1rem;
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .bento-card:hover {
      transform: translateY(-3px);
      box-shadow: 0 16px 32px -8px rgba(13, 56, 52, 0.08);
      border-color: rgba(13, 56, 52, 0.2);
    }
    .badge-soft {
      background-color: rgba(13, 56, 52, 0.08);
      color: #0D3834;
    }
    .tab-btn.active {
      background-color: #0D3834;
      color: #ffffff;
      border-color: #0D3834;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
    }
    .faq-item.open .faq-content {
      max-height: 260px;
    }
    .faq-item.open .faq-icon {
      transform: rotate(180deg);
    }
    /* 移动端菜单过渡 */
    #mobile-menu {
      transition: transform 0.3s ease-in-out;
    }