html - 向右浮动后无法清除元素

Question

出于某种原因，我永远无法清除元素，这只会让人感到困惑!。我试试这个:

.clearfix:after {
        visibility: hidden;
        display: block;
        font-size: 0;
        content: " ";
        clear: both;
        height: 0;
        }
* html .clearfix             { zoom: 1; }  /*IE6*/ 
*:first-child+html .clearfix { zoom: 1; }  /*IE7 */

到父元素，没有任何作用!真的很困惑:/

http://pastebin.com/qAGaCYbH

Answer 1

从 html5boilerplate.com 试试这个:

/* The Magnificent Clearfix: 
   Updated to prevent margin-collapsing on child elements. 
   j.mp/bestclearfix */

.clearfix:before, .clearfix:after { 
    content: "\0020"; 
    display: block; 
    height: 0; 
    overflow: hidden; 
}

.clearfix:after { 
    clear: both; 
}

/* Fix clearfix: 
   blueprintcss.lighthouseapp.com/projects/15318/tickets/5-extra-margin-padding-bottom-of-page */

.clearfix { 
    zoom: 1; 
}