.alert{width: 100%; height: 100%; position: fixed; top: 0; left: 0; background: rgba(0, 0, 0, 0.8); z-index: 9999; display: none;}
.alert_close{width: 30px; height: 30px; position: absolute; display: block; top: 15px; right: 15px; background: url(img/ico_close.png) no-repeat center/100%;}
.alert_img{width: 100%; position: absolute; top: 25%; display: none;}
.alert_img img{width: 100%; margin: 0 auto; display: none;}

.layui-layer-btn0{font-size: 12px;}