/* roulang page: index */
:root {
      --primary: #EA580C;
      --primary-hover: #C2410C;
      --secondary: #0D9488;
      --bg-light: #FBFBFA;
      --bg-alt: #F5F3EF;
      --ink-title: #0F172A;
      --ink-body: #334155;
      --ink-muted: #64748B;
      --border-color: #E2E8F0;
    }
    * {
      box-sizing: border-box;
    }
    body {
      background-color: var(--bg-light);
      color: var(--ink-body);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
    }
    .hero-mesh {
      background: radial-gradient(circle at 10% 20%, rgba(234, 88, 12, 0.07) 0%, transparent 45%),
                  radial-gradient(circle at 90% 80%, rgba(13, 148, 136, 0.06) 0%, transparent 50%),
                  #FBFBFA;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 9999px;
    }