.adv_content{width: 1200px;height:auto;position: relative;}
.adv_martop{width: 1110px;float: left;margin-top:8px;margin-left: 45px}
.adv_bt{width: 195px;height:56px;position: absolute;left: 560px;top:300px}
.adv_btn{background: url(/src/home/kecheng/img/adv_detail/btn_1.png) no-repeat;width: 195px;height:56px;display: block}
.adv_btn:hover{background: url(/src/home/kecheng/img/adv_detail/btn_2.png) no-repeat;}