.all_page{
  position: fixed;
  height: 100%;
  width: 100%;
  background: #fff;
  justify-content: center;/*水平居中*/
}
.all_page .content{
  font-size: 30rpx;
  text-align: center;
  height: 400px;
  width: 100%;
  position: absolute; 
  top: 50%;
  margin-top:-200px;
}
.logo{width: 140rpx; height: 140rpx; border-radius:50% }
.all_page .content .title{
   font-size: 36rpx; margin: 20rpx 0
}

.all_page .err{
    color:red;
    font-size: 36rpx;
    margin-top: 300rpx; 
}