body { font-family: 'Inter', sans-serif; }
    /* 自定义呼吸灯：调整为青绿色系，匹配背景 */
    .breathing-glow {
        animation: glow 3s infinite alternate;
    }
    @keyframes glow {
        from { box-shadow: 0 0 10px -5px rgba(20, 184, 166, 0.2); }
        to { box-shadow: 0 0 25px 5px rgba(20, 184, 166, 0.4); }
    }