/* 呼吸灯阴影特效 */
        .shadow-breath {
            animation: breathe 3s infinite alternate;
        }
        @keyframes breathe {
            0% { box-shadow: 0 4px 6px rgba(59, 130, 246, 0.2); }
            100% { box-shadow: 0 20px 25px rgba(59, 130, 246, 0.6); }
        }