/* roulang page: index */
:root {
      --primary: #059669;
      --secondary: #0EA5E9;
      --dark: #0B0F19;
      --card-bg: rgba(15, 23, 42, 0.75);
      --border-color: rgba(51, 65, 85, 0.6);
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      background-color: #0B0F19;
      color: #E2E8F0;
      font-family: Inter, -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .hero-mask {
      background: linear-gradient(180deg, rgba(11, 15, 25, 0.82) 0%, rgba(11, 15, 25, 0.95) 75%, #0B0F19 100%);
    }
    .card-glow {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-glow:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -10px rgba(14, 165, 233, 0.2);
      border-color: rgba(14, 165, 233, 0.5);
    }
    details summary::-webkit-details-marker {
      display: none;
    }