/* roulang page: index */
:root {
      --bg-main: #0A0D14;
      --bg-card: #121722;
      --border-glow: rgba(255, 255, 255, 0.08);
      --border-hover: rgba(99, 102, 241, 0.45);
      --brand-gradient: linear-gradient(135deg, #6366F1 0%, #3B82F6 50%, #06B6D4 100%);
    }

    body {
      background-color: var(--bg-main);
      color: #E2E8F0;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
      overflow-x: hidden;
    }

    .brand-gradient-text {
      background: linear-gradient(135deg, #A5B4FC 0%, #38BDF8 50%, #2DD4BF 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .brand-btn-primary {
      background: linear-gradient(135deg, #4F46E5 0%, #2563EB 50%, #0891B2 100%);
      transition: all 0.25s ease-in-out;
    }
    .brand-btn-primary:hover {
      box-shadow: 0 0 25px rgba(59, 130, 246, 0.5);
      transform: translateY(-2px);
    }

    .glass-card {
      background: rgba(18, 23, 34, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-glow);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glass-card:hover {
      border-color: var(--border-hover);
      box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.7), 0 0 20px rgba(99, 102, 241, 0.15);
      transform: translateY(-3px);
    }

    .custom-scroll::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scroll::-webkit-scrollbar-thumb {
      background: rgba(255, 255, 255, 0.15);
      border-radius: 4px;
    }

    /* 脉冲光效动画 */
    @keyframes pulseRing {
      0% { transform: scale(0.95); opacity: 0.8; }
      50% { transform: scale(1.15); opacity: 0.3; }
      100% { transform: scale(0.95); opacity: 0.8; }
    }
    .pulse-ring {
      animation: pulseRing 3s infinite ease-in-out;
    }