/* roulang page: index */
:root {
      --bg-dark: #030712;
      --bg-card: rgba(28, 37, 65, 0.75);
      --neon-blue: #00F0FF;
      --core-blue: #3A86FF;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
      --border-line: rgba(0, 240, 255, 0.16);
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .glass-card {
      background: var(--bg-card);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 240, 255, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 16px 36px -10px rgba(0, 240, 255, 0.18);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00F0FF 0%, #3A86FF 100%);
      color: #030712;
      box-shadow: 0 0 22px rgba(0, 240, 255, 0.42);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 240, 255, 0.7);
      transform: translateY(-2px);
    }
    .btn-outline {
      border: 1px solid rgba(0, 240, 255, 0.35);
      background: rgba(11, 19, 43, 0.6);
      transition: all 0.25s ease;
    }
    .btn-outline:hover {
      border-color: var(--neon-blue);
      background: rgba(0, 240, 255, 0.12);
      color: #FFFFFF;
    }
    .countdown-ring {
      background: conic-gradient(var(--neon-blue) 0deg 280deg, rgba(255, 255, 255, 0.1) 280deg 360deg);
    }