/* roulang page: index */
:root {
      --primary: #0A58CA;
      --primary-hover: #084298;
      --accent: #0D9488;
      --bg-light: #F8FAFC;
      --bg-card: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #475569;
      --border-color: #E2E8F0;
      --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
      --shadow-md: 0 4px 20px -2px rgba(10, 88, 202, 0.08);
      --shadow-lg: 0 12px 30px -4px rgba(10, 88, 202, 0.12);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Source Han Sans CN", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      -webkit-font-smoothing: antialiased;
    }
    .custom-scroll-bar::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll-bar::-webkit-scrollbar-thumb {
      background-color: #CBD5E1;
      border-radius: 9999px;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }