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); }
    }