.alert{display:none;position:fixed;top:0;z-index:11;text-align:center;width:100%;line-height:30px;height:30px;color:#fff;font-size:1rem}.alert_bo{display:none;position:fixed;bottom:0;z-index:99999;text-align:center;width:100%;line-height:30px;height:30px;color:#fff;font-size:1rem}.alert-danger{background:crimson;display:block}.alert-success{background:#228b22;display:block}