index.html style takes effect unexpectedly in Android version 4.4.2, everything else is invalid
expected effect

only the internal style of < link rel= "stylesheet" href= "index.css" / > takes effect

index.css: html, body,: global (- sharproot) {

            height: 100%;
            margin: 0;
            padding: 0;
            background: -sharp28275a;
           }
           

there was the same problem with using create-react-app scaffolding before, but the problem was solved with the introduction of < link rel= "stylesheet" href= " https://maxcdn.bootstrapcdn.c.;>. But the dva is invalid. Do you gods have a good solution?