.content-main{ position: relative; width: 800px; height: 411px; margin-left: auto; margin-right: auto; }
.content-btn{
   /*  position: absolute;
   width:100px;
   height:411px;
      
   z-index:10;
   cursor: pointer; */
}
.prev-btn{
    left:-50px;
    top:150px;
    background: url(../image/pic_left.png) center top no-repeat;
    width: 40px!important; height: 40px!important; display: block;
    position: absolute;
    cursor: pointer;
}
.next-btn{
    right:-50px;
    top:150px;
    background: url(../image/pic_right.png) center top no-repeat;
    width: 40px!important; height: 40px!important; display: block;
    position: absolute;
    cursor: pointer;
}
.prev-btn:hover{background: url(../image/pic_left1.png) center top no-repeat;}
.next-btn:hover{background: url(../image/pic_right1.png) center top no-repeat;}
 .btn-img{
    
     display: none;
} 
.list{
    width:800px;
    height:411px;
}
.list li{
    position: absolute;
    left:0;
    top:0;
    overflow: hidden;
     text-align: center;
}

.list_h3{ font-size: 16px; height: 50px; line-height: 50px; overflow: hidden;transition: all 0.5s ease 0s; }
.list_h3:hover{ color: #00a1e4; transition: all 0.5s ease 0s; }