How can WeChat Mini Programs set the font size of the root element and then use rem?

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@ media only screen and (min-width:320px) {html {font-size:12px;}}
@ media only screen and (min-width:375px) {html {font-size:13px;}}
@ media only screen and (min-width:412px) {html {font-size:14px;}}

htmlrem1rembodypagepage1rem1rem16px1rem

Mini-Program html css html5 css3

Feb.28,2021

reset css uses rpx as a unit

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