/* roulang page: index */
:root {
      --brand-navy: #0F2942;
      --brand-dark: #0A1118;
      --brand-blue: #0066FF;
      --brand-green: #00D285;
      --text-main: #334155;
      --text-light: #64748B;
      --bg-paper: #F8FAFC;
    }
    * {
      box-sizing: border-box;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-paper);
      font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      line-height: 1.6;
    }
    details summary::-webkit-details-marker {
      display: none;
    }