/* roulang page: index */
:root {
      --bg-dark: #080C14;
      --card-bg: rgba(13, 21, 38, 0.75);
      --card-border: rgba(255, 255, 255, 0.08);
      --cyan-glow: #00F2FE;
      --blue-glow: #4FACFE;
    }
    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: rgba(13, 21, 38, 0.72);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid rgba(255, 255, 255, 0.09);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 242, 254, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 10px 30px -10px rgba(0, 242, 254, 0.2);
    }
    .btn-glow {
      background: linear-gradient(135deg, #00F2FE 0%, #4FACFE 100%);
      color: #040914;
      font-weight: 600;
      box-shadow: 0 0 20px rgba(0, 242, 254, 0.35);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(0, 242, 254, 0.6);
      transform: scale(1.02);
    }
    .btn-outline-glow {
      border: 1px solid rgba(0, 242, 254, 0.45);
      color: #00F2FE;
      background: rgba(0, 242, 254, 0.05);
      transition: all 0.25s ease;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 242, 254, 0.15);
      border-color: #00F2FE;
      box-shadow: 0 0 18px rgba(0, 242, 254, 0.3);
    }
    .pulse-dot {
      animation: pulseGlow 2s infinite;
    }
    @keyframes pulseGlow {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(1.2); }
    }
    .coupon-edge {
      background: radial-gradient(circle at 0 50%, transparent 10px, rgba(13, 21, 38, 0.8) 11px);
    }