/* roulang page: index */
:root {
      --primary: #0F52BA;
      --secondary: #00A3E0;
      --accent: #FF6B00;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --shadow-soft: 0 4px 20px -2px rgba(15, 82, 186, 0.05), 0 2px 6px -1px rgba(0, 0, 0, 0.03);
      --shadow-hover: 0 20px 25px -5px rgba(15, 82, 186, 0.12), 0 10px 10px -5px rgba(15, 82, 186, 0.04);
    }
    body {
      font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: #334155;
      background-color: #FFFFFF;
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: var(--shadow-soft);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .custom-shadow:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }
    .hero-bg-overlay {
      background: linear-gradient(135deg, rgba(248, 250, 252, 0.95) 0%, rgba(241, 245, 249, 0.9) 100%);
    }
    .dark-pattern-grid {
      background-image: radial-gradient(rgba(255, 255, 255, 0.08) 1px, transparent 1px);
      background-size: 24px 24px;
    }
    .nav-blur {
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }