/* roulang page: index */
:root {
      --primary: #0284C7;
      --primary-dark: #0F172A;
      --accent: #10B981;
      --bg-light: #F8FAFC;
      --bg-alt: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.75;
      overflow-x: hidden;
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(2, 132, 199, 0.25) 0%, rgba(15, 23, 42, 0.95) 75%);
    }
    details > summary::-webkit-details-marker {
      display: none;
    }