上面的图为正常引用字体里面对应的字符标示！
在页面展示只需要一个class 就能引用出来。
但是我发现一些国外的网站模板里面引用可另外一种索引方式
介绍如下：
第一步引用字体
?
第二步：
?
加载class字体
在页面上 引入css
下面就是页面展示的参数，拿其中一个举例子：
展示效果“
他在span标签引用这个icon 但是没有指定 我们正常模式下面的例如 icon-car 这样而是统一了icon 用了一个html的字符编码=xxx
我用typeTool3字体查看器打开字体查看，并没有发现什么61xx开头的对应的东西
如下图
我的问题 那个对应的索引61xx 是怎么算出来。。。
请大牛帮忙解答一些，O(∩_∩)O谢谢
百度大牛邮件回复：
只是引用Unicode码位的进制不同。61700是十六进制的f104转成十进制的结果。
CSS中，引用字符写在了icon对应伪元素的content属性中，比如angle-left这个图标对应的CSS是：content: "\f104"; ß f104是这个字符的Unicode编码
除了常见的预先命名的 < >等字符，HTML 中也可以使用Unicode形式引入字符，可参考HTML规范：
http://www.w3.org/TR/html/syntax.html#character-references
十进制引用：
十六进制引用：
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