Why does it not work to directly set the font size and color of I? the code is as follows
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<link href="https://cdn.bootcss.com/font-awesome/4.7.0/css/font-awesome.css" rel="stylesheet">
<title>Document</title>
<style>
.container {
text-align: center;
padding-top: 10%;
}
i {
font-size: "50px";
color: "-sharp10AEFF";
margin-bottom: "10%"
}
.txt {
font-size: 120%;
margin-top:10%;
}
</style>
</head>
<body>
<div class="container">
<i class="fa fa-exclamation-circle fa-5x"></i>
<div class="txt"></div>
</div>
<script>
var ua = window.navigator.userAgent.toLowerCase();
if (!!(ua.indexOf("micromessenger") != -1)) {//
} else {
}
</script>
</body>
</html> element as shown in figure 