/* 呼吸灯特效 */
    .breathing-shadow {
        animation: breathe 3s infinite ease-in-out;
    }
    @keyframes breathe {
        0% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.3); }
        50% { box-shadow: 0 0 35px rgba(59, 130, 246, 0.7); }
        100% { box-shadow: 0 0 15px rgba(59, 130, 246, 0.3); }
    }