/* roulang page: index */
:root {
      --primary: #1E293B;
      --accent: #0F766E;
      --highlight: #F59E0B;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: #334155;
      background-color: var(--bg-base);
    }
    /* 原生手风琴图标翻转动画 */
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }