/* roulang page: index */
:root {
      --primary: #1a56db;
      --primary-hover: #1e40af;
      --accent: #0e9f6e;
      --text-main: #0f172a;
      --text-muted: #475569;
      --bg-light: #f8fafc;
      --border-color: #e2e8f0;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .hero-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(26, 86, 219, 0.78) 100%);
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .arrow-icon {
      transform: rotate(180deg);
    }