/* roulang page: index */
:root {
      --brand-primary: #10B981;
      --brand-accent: #8B5CF6;
      --brand-dark: #0F172A;
      --brand-slate: #1E293B;
      --brand-body: #334155;
      --brand-muted: #64748B;
      --brand-border: #E2E8F0;
      --brand-bg-soft: #F8FAFC;
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      color: var(--brand-body);
      line-height: 1.75;
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    h1, h2, h3, h4, h5, h6 {
      letter-spacing: -0.02em;
      line-height: 1.25;
      color: var(--brand-dark);
      font-weight: 700;
    }
    .hero-search-shadow {
      box-shadow: 0 12px 40px -10px rgba(16, 185, 129, 0.18), 0 4px 12px -2px rgba(15, 23, 42, 0.06);
    }
    .metric-card-glow {
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.04);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .metric-card-glow:hover {
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -4px rgba(16, 185, 129, 0.12), 0 6px 16px -2px rgba(139, 92, 246, 0.08);
    }