layui的msg弹出框设置字体大小弹出框大小

layer.msg("123", { icon: $.modal.icon(modal_status.WARNING), time: 3000, shift: 5,offset:"rb",area:['400px','66px'] },function () {
 
});

　　

layer.msg('<span style="font-size: 20px;">提示内容</span>')