插入网络CSS矢量图标、网络SVG矢量图标

<!--网络CSS矢量图标-->
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.2.0/css/all.css">

<!--网络SVG矢量图标-->
<script src="https://use.fontawesome.com/releases/v5.2.0/js/all.js"></script>