body
{
  background: #2d2b2b; /* Old browsers */
background: -moz-linear-gradient(-45deg, #2d2b2b 1%, #5b5b5b 100%); /* FF3.6-15 */
background: -webkit-linear-gradient(-45deg, #2d2b2b 1%,#5b5b5b 100%); /* Chrome10-25,Safari5.1-6 */
background: linear-gradient(135deg, #2d2b2b 1%,#5b5b5b 100%); /* W3C, IE10+, FF16+, Chrome26+, Opera12+, Safari7+ */
filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#2d2b2b', endColorstr='#5b5b5b',GradientType=1 ); /* IE6-9 fallback on horizontal gradient */
}
.center-div
{
  position: absolute;
  margin: auto;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  width: 1000px;
  height: 310px;
}
.center-div img {
    width: 100%;
    height: auto;
}
@media (max-width: 1024px) {
    .center-div {
        width: 700px;
        height: 217px;
    }
    
}