/* roulang page: index */
:root {
      --brand-primary: #1E40AF;
      --brand-accent: #F97316;
      --bg-base: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: var(--bg-base);
      color: #334155;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    }
    .card-hover {
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 20px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    }
    .hero-bg {
      background-image: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%), url('/assets/images/5496f54c80868250.png');
      background-size: cover;
      background-position: center;
    }
    .dark-section-bg {
      background-image: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    }