.center-order-send {
margin-left: 163rpx;
margin-right: 163rpx;
position: relative;
}
.center-order-num-posi{
position: absolute;
padding:2rpx 10rpx;
border:1px solid #f50000;
background-color: #f50000;
color:white;
border-radius: 30rpx;
top:2rpx;
left:46rpx;
}
重点注意 父级要用position:relative
子元素用position:absolute
然后用top left 来控制位置