/* roulang page: index */
:root {
      --bg-dark: #0B0F19;
      --primary: #0284C7;
      --accent-cyan: #06B6D4;
      --accent-green: #10B981;
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
      overflow-x: hidden;
    }
    .glass-panel {
      background: rgba(15, 23, 42, 0.72);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid rgba(56, 189, 248, 0.16);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-panel:hover {
      border-color: rgba(56, 189, 248, 0.45);
      box-shadow: 0 0 25px rgba(2, 132, 199, 0.25);
      transform: translateY(-2px);
    }
    .glow-btn-primary {
      background: linear-gradient(135deg, #06B6D4 0%, #0284C7 100%);
      box-shadow: 0 0 18px rgba(6, 182, 212, 0.4);
      transition: all 0.25s ease-in-out;
    }
    .glow-btn-primary:hover {
      box-shadow: 0 0 26px rgba(6, 182, 212, 0.65);
      transform: translateY(-2px);
    }
    .glow-btn-secondary {
      background: rgba(15, 23, 42, 0.8);
      border: 1px solid rgba(56, 189, 248, 0.35);
      box-shadow: 0 0 12px rgba(2, 132, 199, 0.15);
      transition: all 0.25s ease-in-out;
    }
    .glow-btn-secondary:hover {
      background: rgba(30, 41, 59, 0.9);
      border-color: #38BDF8;
      box-shadow: 0 0 20px rgba(56, 189, 248, 0.35);
      transform: translateY(-2px);
    }
    .radial-bg {
      background: radial-gradient(circle at 50% 0%, rgba(2, 132, 199, 0.15) 0%, rgba(11, 15, 25, 0) 70%);
    }
    .pulse-dot {
      animation: pulseGlow 2s infinite;
    }
    @keyframes pulseGlow {
      0% { transform: scale(0.95); opacity: 0.8; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
      70% { transform: scale(1); opacity: 1; box-shadow: 0 0 0 8px rgba(16, 185, 129, 0); }
      100% { transform: scale(0.95); opacity: 0.8; box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
    }