/* roulang page: index */
:root {
      --bg-dark: #0B132B;
      --bg-card: rgba(28, 37, 65, 0.65);
      --border-card: rgba(255, 255, 255, 0.12);
      --border-active: rgba(0, 240, 255, 0.6);
      --color-primary: #3A86FF;
      --color-accent: #00F0FF;
    }
    body {
      background-color: var(--bg-dark);
      color: #E0E1DD;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid var(--border-card);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: var(--border-active);
      transform: translateY(-5px);
      box-shadow: 0 10px 30px -10px rgba(0, 240, 255, 0.25);
    }
    .neon-border {
      position: relative;
    }
    .neon-border::after {
      content: '';
      position: absolute;
      inset: -1px;
      border-radius: inherit;
      padding: 1px;
      background: linear-gradient(135deg, rgba(0,240,255,0.6), rgba(58,134,255,0.2), rgba(255,183,3,0.4));
      -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
      -webkit-mask-composite: xor;
      mask-composite: exclude;
      pointer-events: none;
    }