/* roulang page: index */
:root {
      --primary-color: #0F294A;
      --secondary-color: #D97706;
      --deep-bg: #0A192F;
      --light-bg: #F8FAFC;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-default: 0.75rem;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      color: var(--text-main);
      background-color: #FFFFFF;
      line-height: 1.75;
      overflow-x: hidden;
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(15, 41, 74, 0.94) 0%, rgba(10, 25, 47, 0.96) 100%);
    }
    .card-hover {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 28px -6px rgba(15, 41, 74, 0.12), 0 8px 12px -4px rgba(15, 41, 74, 0.06);
    }
    .badge-amber {
      background-color: #FEF3C7;
      color: #92400E;
    }
    .accordion-content {
      transition: max-height 0.35s ease-out, opacity 0.3s ease-out;
    }