.atvgroup{
    width:100%;
    cursor:pointer;
}
.atvgroup img{
    left:50%;
    display: inline-block;
    position: absolute;
    margin-left:-450px;
    border:2px solid white
}
.atvgroup img:hover{
    border:2px solid #db9458;
}
.atvgroup img.top{

    margin-top:20px;
}

.atvgroup img.bottom{

    margin-top:130px;
}