/* roulang page: index */
:root {
      --primary-color: #0EA5E9;
      --primary-dark: #0284C7;
      --accent-cyan: #06B6D4;
      --bg-slate: #1E293B;
      --bg-dark: #0F172A;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
    }
    body {
      color: var(--text-body);
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      line-height: 1.75;
      background-color: #FAFAFC;
    }
    .custom-diagonal {
      clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
    }
    .hero-glow {
      background: radial-gradient(circle at 75% 30%, rgba(14, 165, 233, 0.12) 0%, transparent 60%);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .badge-blur {
      backdrop-filter: blur(8px);
      background-color: rgba(255, 255, 255, 0.85);
    }