.clearfix:after{
display: bolck;
content:"";/设置内容为空/
visibility:hidden;/将元素隐藏/
clear:both;/清除浮动/
}
.clearfix{
zoom:1;/为了兼容IE/
}
.clearfix:after{
display: bolck;
content:"";/设置内容为空/
visibility:hidden;/将元素隐藏/
clear:both;/清除浮动/
}
.clearfix{
zoom:1;/为了兼容IE/
}