.back-img.data-v-4f890410{
display: flex;
justify-content: flex-start;
align-items: center;
width: 50px;
height: 50px;
position: fixed;
left: 30rpx;
z-index: 10;
}
.back-img>image.data-v-4f890410{
width: 19rpx;
height: 35rpx;