/* roulang page: index */
:root {
      --primary-color: #0E7090;
      --accent-color: #10B981;
      --bg-surface: #F8FAFC;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --shadow-med: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 28px -4px rgba(14, 112, 144, 0.12);
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #ffffff;
      color: var(--text-body);
      line-height: 1.6;
      overflow-x: hidden;
    }
    .hero-slant {
      clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-slant {
        clip-path: none;
      }
    }
    .med-card {
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
      box-shadow: var(--shadow-med);
    }
    .med-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-hover);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
      width: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: #CBD5E1;
      border-radius: 999px;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .bg-grid-pattern {
      background-image: radial-gradient(rgba(14, 112, 144, 0.12) 1px, transparent 1px);
      background-size: 24px 24px;
    }