/* roulang page: index */
:root {
      --primary-color: #059669;
      --primary-dark: #0f766e;
      --accent-color: #2563eb;
      --bg-surface: #f8fafc;
      --text-main: #0f172a;
      --text-muted: #64748b;
      --border-color: #e2e8f0;
    }
    body {
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: #334155;
      background-color: #f8fafc;
      overflow-x: hidden;
    }
    .card-transition {
      transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.25s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.25s ease;
    }
    .card-transition:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 28px -4px rgba(15, 23, 42, 0.08);
      border-color: #cbd5e1;
    }
    .glass-nav {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }
    .dark-grid-bg {
      background-color: #0b1120;
      background-image: radial-gradient(rgba(37, 99, 235, 0.15) 1px, transparent 0);
      background-size: 28px 28px;
    }
    .glow-ring {
      box-shadow: 0 0 20px rgba(5, 150, 105, 0.25);
    }