/* roulang page: index */
:root {
      --primary-color: #1E40AF;
      --accent-color: #D97706;
      --bg-light: #F8FAFC;
      --text-main: #0F172A;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #ffffff;
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 10px 25px -5px rgba(30, 64, 175, 0.06), 0 8px 10px -6px rgba(30, 64, 175, 0.04);
    }
    .card-hover {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 30px -10px rgba(30, 64, 175, 0.12);
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.75) 100%);
    }