/* roulang page: index */
:root {
      --primary: #0F2B5C;
      --primary-light: #1E40AF;
      --accent: #0284C7;
      --bg-base: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-muted: #64748B;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-base);
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(7, 22, 48, 0.88) 0%, rgba(15, 43, 92, 0.75) 100%);
    }
    .custom-scroll::-webkit-scrollbar {
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background-color: #cbd5e1;
      border-radius: 9999px;
    }
    .card-hover-fx {
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
    }
    .card-hover-fx:hover {
      transform: translateY(-4px);
    }
    .accordion-content {
      transition: max-height 0.35s ease-out, opacity 0.3s ease;
    }