.clearfix { 
    display: inline-block; 
} 
.clearfix:after { 
    /*/*/content: "."; /* 兼容ie8 */ 
    display: block; 
    height: 0; 
    clear: both; 
    visibility: hidden; 
} 
/* Hides from IE-mac \*/ 
* html .clearfix { 
    height: 1%; 
} 
.clearfix { 
    display: block; 
}