/*：这是演示代码,不是源代码。源码下载唯一地址: http://www.bootstrapmb.com/item/434(此说明只在演示页面有,不在下载的源码里)*//*  1 - media screen and (min-width: 2560px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 1600px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 1440px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 1199px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 1024px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 991px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 768px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 767px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 480px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 375px)----------------------------------- ----------------------------------- *//*  1 - media screen and (min-width: 320px)----------------------------------- ----------------------------------- *//*：这是演示代码,不是源代码。源码下载唯一地址: http://www.bootstrapmb.com/item/434(此说明只在演示页面有,不在下载的源码里)*/