.first{border-style:solid;border-width:0 0 0 1px;border-color:#fff #fff #c2c2c2 #e5e8ed}.first .cate,.first .main,.first .extra{float:left;background-color:#fff;border-right:1px solid #e5e8ed;border-bottom:1px solid #c2c2c2}.first .main,.first .extra{margin-top:15px;height:494px}.first .cate{width:238px;height:508px;padding-top:1px}.first .main{width:710px}.first .extra{width:238px}.first .tab-banner{height:350px;border-bottom:1px solid #e5e8ed;position:relative}