查看“︁首页”︁的源代码

<html>
<style type="text/css">
     body{
    width: 100%;
    height: 100%;
}
.mui-content{
    background: url(https://www.mywiki.cn/images/1745/b/b3/46815_20191016095920885_0.jpg) bottom center no-repeat #efeff4 ;
    background-size: 100% 100%;
    width: 100%;
    height: 100%;
}
</style>
</html>