/* roulang page: index */
:root {
      --primary: #008080;
      --secondary: #FF7A59;
      --bg-main: #F7FAFC;
      --dark-accent: #0F172A;
      --text-main: #1E293B;
      --text-muted: #475569;
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      line-height: 1.75;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .custom-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }
    .custom-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -4px rgba(0, 128, 128, 0.12);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }