直接引入Font Awesome的css

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Document</title>
    <link href="http://netdna.bootstrapcdn.com/font-awesome/4.7.0/css/font-awesome.min.css" rel="stylesheet">
</head>
<body>
<i class="fa fa-camera-retro fa-lg"></i> fa-lg
<i class="fa fa-camera-retro fa-2x"></i> fa-2x
<i class="fa fa-camera-retro fa-3x"></i> fa-3x
<i class="fa fa-camera-retro fa-4x"></i> fa-4x
<i class="fa fa-camera-retro fa-5x"></i> fa-5x
<i class="fa fa-camera-retro"></i> fa-camera-retro
</body>
</html>

有了这个，很多图标放大缩小，改变颜色都变得非常简单，更多参考官方吧~写得很简单明了>>>http://fontawesome.dashgame.com/

图标框架Font Awesome_html

图标框架Font Awesome_html_02