/* roulang page: index */
:root {
      --bg-primary: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #475569;
      --brand-accent: #00C29A;
      --brand-dark: #0A0D12;
    }
    body {
      background-color: var(--bg-primary);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      -webkit-font-smoothing: antialiased;
    }
    .hover-lift {
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease;
    }
    .hover-lift:hover {
      transform: translateY(-3px);
      border-color: rgba(0, 194, 154, 0.4);
    }
    .custom-shadow {
      box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 10px 25px -5px rgba(0,0,0,0.02);
    }
    .carousel-slide {
      transition: opacity 0.6s ease-in-out;
    }
    .faq-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease-out, padding 0.35s ease-out;
    }
    .faq-active .faq-content {
      max-height: 200px;
    }
    .faq-active .faq-icon {
      transform: rotate(180deg);
    }