.fl{float:left;display:inline}.fr{float:right;display:inline}.clearfix:after,.clearfix:before{content:"";display:table}.clearfix:after{clear:both;overflow:hidden}.clearfix{zoom:1}.but{display:inline-block;text-align:center;cursor:pointer;background:0 0}.but:hover{text-decoration:none}.bg_f{background:#fff}.pr{position:relative}.pa{position:absolute}.ovh{overflow:hidden}.mt10{margin-top:10px}.mt20{margin-top:20px}.mt25{margin-top:25px}