/* 呼吸灯阴影特效 */
        @keyframes breathing-shadow {
            0% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.3); }
            50% { box-shadow: 0 0 40px rgba(59, 130, 246, 0.6); }
            100% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.3); }
        }
        .breathing-effect {
            animation: breathing-shadow 4s infinite ease-in-out;
        }