.box8021_a{ clear:both; overflow:hidden; width:997px; height:400px; position:relative;  margin:0 auto;}
.box8021_a ul{ margin:0; padding:0; padding-top:25px; padding-bottom:25px; }
.box8021_a li{ float:left; display:block; width:230px; height:160px; border:2px solid #0e509a; margin-left:15px; margin-bottom:25px; overflow:hidden;}
.box8021_a li img{ width:230px; border:0;}