CSS清除浮动

参考一：From  http://www.bitscn.com/school/HTMLCSS/201312/284207.html

.clearfix:after { 
content: "."; 
display: block; 
height: 0; 
clear: both; 
visibility: hidden; 
} 
.clearfix {display: inline-block;} /* for IE/Mac */ 
</style> 
<!--[if IE]> <style type="text/css"> 
.clearfix {zoom: 1;/* triggers hasLayout */ 
display: block;/* resets display for IE/Win *

参考二：http://www.jb51.net/css/67471.html

/* For modern browsers */ 
.cf:before,.cf:after { 
content:""; 
display:table; 
} 
.cf:after { clear:both; }/* For IE 6/7 (trigger hasLayout) */ 
.cf { zoom:1; } 

 参考三：from  http://www.cnblogs.com/iloveyoucc/archive/2012/09/17/2688962.html

清除浮动方法：

1. .overflow1{overflow:hidden;zoom:1;}

2. .clearfix{display：block;}

.clearfix:after{
    clear: both;
    content: ".";
    display: block;
    height: 0;
    visibility: hidden;
}