标签：class abs html ack pos css htm idt alc
<style>
html{
font-size:calc(100vw/640*100);
}
.main{
position: absolute;
top: 0;
left: 0;
width: 6.4rem;
height: 6.4rem;
background:red;
}
</style>
标签：class abs html ack pos css htm idt alc
原文地址：https://www.cnblogs.com/FlowLight/p/11350879.html
