#contwrap:after{content:'';height:0;clear:both;display:block;visibility:hidden;}
清除浮动带来的父容器高度塌陷带来的影响
转载于:https://www.cnblogs.com/cyhj/p/5566850.html
#contwrap:after{content:'';height:0;clear:both;display:block;visibility:hidden;}
转载于:https://www.cnblogs.com/cyhj/p/5566850.html