.box4000_c{ clear:both; overflow:hidden; width:800px; height:300px; position:relative; margin:0 auto; }
.box4000_c ul{ float:left; margin:0; padding:0; padding-top:0px; padding-bottom:0px; }
.box4000_c li{ float:left; display:inline; width:330px; height:250px; border:0px solid #999999; margin-left:20px; margin-bottom:0px; overflow:hidden;}
.box4000_c li:hover{ opacity: 0.7; -ms-filter:alpha(opacity=70); filter: alpha(opacity=70); zoom:1; }
.box4000_c li img{ width:330px; border:0;}
.box4000_c li:hover img { width:340px; }