核心提示：头部加上这么一段!--[if lt IE 9]script src=https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js/scriptscri...
头部加上这么一段
<!--[if lt IE 9]> <script src="https://oss.maxcdn.com/html5shiv/3.7.3/html5shiv.min.js"></script> <script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script> <![endif]-->
