JSFiddle - React, Tailwind, and code Playground

HTML

<h1><a href="#">測試</a></h1>

CSS

h1 a {
  color: black;
}

@media screen and (max-width: 768px) {
  h1 a {
    color: red;
  }
  h1 a:visited {
    color: green;
  }
}