/* roulang page: index */
:root {
      --primary: #0f172a;
      --accent: #2563eb;
      --cyan: #0891b2;
      --amber: #f59e0b;
      --bg-light: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: #ffffff;
      line-height: 1.7;
    }
    .custom-shadow-card {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .custom-shadow-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 10px 10px -5px rgba(15, 23, 42, 0.04);
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .hero-gradient-overlay {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.92) 0%, rgba(15, 23, 42, 0.75) 60%, rgba(8, 145, 178, 0.6) 100%);
    }
    .bento-card {
      transition: transform 0.3s ease, border-color 0.3s ease;
    }
    .bento-card:hover {
      border-color: #38bdf8;
    }