@function size($n) {
@return $n/750 * 100vw;
}
.panel {
background: url('../assets/images/bg1.png');
background-size:100% 100% ;
height: size(3300);
.top {
background: url('../assets/images/bg.jpg');
background-size: 100% 125%;
height: size(1050);
}
}
![](https://img2020.cnblogs.com/blog/1319811/202008/1319811-20200812101516747-855572341.png)