已解决，对style.css文件作如下修改（红色部分）

原内容：

.mainpdbox .left .left02{}

.mainpdbox .left .left02 .coll{width:333px;float:right;height:265px;overflow:hidden;margin-bottom:10px;border:1px solid #CBCBCB; padding-bottom:10px; }

.mainpdbox .left .left02 .colr{width:333px;float:left;height:265px;overflow:hidden;margin-bottom:10px; border:1px solid #CBCBCB; padding-bottom:10px;}

.mainpdbox .left .left02 .coll .t,.mainpdbox .left .left02 .colr .t{ width:333px; height:30px; line-height:30px;font-weight:bold;font-family:"微软雅黑"; border-top:2px solid #005bb4; border-bottom:1px solid #C3C3C3; background:#fff; }

.mainpdbox .left .left02 .coll .t h3,.mainpdbox .left .left02 .colr .t h3{height:25px; width:50px; font-size:16px; padding-left:5px; color:#293036; font-weight:normal; padding-left:10px }

修改后内容：

.mainpdbox .left .left02{}

.mainpdbox .left .left02 .coll{width:333px;float:right;height:265px;overflow:hidden;margin-bottom:10px;border:1px solid #CBCBCB; padding-bottom:10px; }

.mainpdbox .left .left02 .colr{width:333px;float:left;height:265px;overflow:hidden;margin-bottom:10px; border:1px solid #CBCBCB; padding-bottom:10px;}

.mainpdbox .left .left02 .coll .t,.mainpdbox .left .left02 .colr .t{ width:333px; height:30px; line-height:30px;font-weight:bold;font-family:"微软雅黑"; border-top:2px solid #005bb4; border-bottom:1px solid #C3C3C3; background:#fff; }

.mainpdbox .left .left02 .coll .t h3,.mainpdbox .left .left02 .colr .t h3{height:25px; width:80px; font-size:16px; padding-left:5px; color:#293036; font-weight:normal; padding-left:10px }