/* 呼吸灯阴影特效 */
        @keyframes breathing {
            0% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.3); transform: scale(1); }
            50% { box-shadow: 0 0 40px rgba(59, 130, 246, 0.6); transform: scale(1.02); }
            100% { box-shadow: 0 0 20px rgba(59, 130, 246, 0.3); transform: scale(1); }
        }
        .breathing-shadow {
            animation: breathing 3s infinite ease-in-out;
            border-radius: 0.5rem;
        }