您还需要使用
brands.css真棒字体5.0.8中的样式表。此外，您需要确保您的班级名称是最新的。请尝试以下代码段：
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/brands.css" integrity="sha384-IiIL1/ODJBRTrDTFk/pW8j0DUI5/z9m1KYsTm/RjZTNV8RHLGZXkUDwgRRbbQ+Jh" crossorigin="anonymous"><link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/fontawesome.css" integrity="sha384-q3jl8XQu1OpdLgGFvNRnPdj5VIlCvgsDQTQB6owSOHWlAurxul7f+JpUOVdAiJ5P" crossorigin="anonymous"><i ></i><i ></i>
或者，您可以只使用
all.css样式表来包含所有样式
<link rel="stylesheet" href="https://use.fontawesome.com/releases/v5.0.8/css/all.css" integrity="sha384-3AB7yXWz4OeoZcPbieVW64vVXEwADiYyAEhwilzWsLw+9FgqpyjjStpPnpBO8o8S" crossorigin="anonymous">
