gulp压缩的css不对？

background: #505050;

background: -moz-linear-gradient(top, rgba(80, 80, 80, 0) 0%, #505050 8%, #505050 92%, rgba(80, 80, 80, 0) 100%);

background: -webkit-gradient(linear, left top, left bottom, color-stop(0%, #1e5799), color-stop(100%, #7db9e8));

background: -webkit-linear-gradient(top, rgba(80, 80, 80, 0) 0%, #505050 8%, #505050 92%, rgba(80, 80, 80, 0) 100%);

background: -o-linear-gradient(top, rgba(80, 80, 80, 0) 0%, #505050 8%, #505050 92%, rgba(80, 80, 80, 0) 100%);

background: -ms-linear-gradient(top, rgba(80, 80, 80, 0) 0%, #505050 8%, #505050 92%, rgba(80, 80, 80, 0) 100%);

background: linear, to bottom, rgba(80, 80, 80, 0) 0%, #505050 8%, #505050 92%, rgba(80, 80, 80, 0) 100%;

{background: #505050;

background: -moz-linear-gradient(top,rgba(80,80,80,0) 0,#505050 8%,#505050 92%,rgba(80,80,80,0) 100%);

background: -webkit-gradient(linear,left top,left bottom,color-stop(0,#1e5799),color-stop(100%,#7db9e8));

background: -webkit-linear-gradient(top,rgba(80,80,80,0) 0,#505050 8%,#505050 92%,rgba(80,80,80,0) 100%);

background: -o-linear-gradient(top,rgba(80,80,80,0) 0,#505050 8%,#505050 92%,rgba(80,80,80,0) 100%);

background: -ms-linear-gradient(top,rgba(80,80,80,0) 0,#505050 8%,#505050 92%,rgba(80,80,80,0) 100%);

background: 0 0,bottom,0,8%,92%,100% rgba(80,80,80,0);

}