/* roulang page: index */
:root {
      --primary: #0F52BA;
      --primary-hover: #1A56DB;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --card-shadow: 0 4px 20px -2px rgba(15, 82, 186, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
      --card-shadow-hover: 0 12px 28px -4px rgba(15, 82, 186, 0.12), 0 4px 10px -2px rgba(0, 0, 0, 0.05);
    }
    body {
      color: var(--text-body);
      background-color: #FFFFFF;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    }
    .custom-shadow {
      box-shadow: var(--card-shadow);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-shadow:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-4px);
    }
    .hero-glow {
      background: radial-gradient(circle at 50% 30%, rgba(15, 82, 186, 0.08) 0%, rgba(255, 255, 255, 0) 70%);
    }
    .accordion-content {
      transition: max-height 0.35s ease-out, opacity 0.3s ease;
      max-height: 0;
      opacity: 0;
      overflow: hidden;
    }
    .accordion-open .accordion-content {
      max-height: 400px;
      opacity: 1;
    }
    .accordion-open .accordion-icon {
      transform: rotate(180deg);
    }