body { font-family: 'Inter', sans-serif; }
        /* 简单的呼吸灯效果 */
        .pulse-shadow {
            box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7);
            animation: pulse-blue 2s infinite;
        }
        @keyframes pulse-blue {
            0% { transform: scale(0.99); box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.4); }
            70% { transform: scale(1); box-shadow: 0 0 0 10px rgba(59, 130, 246, 0); }
            100% { transform: scale(0.99); box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
        }