.back{
  width:687px;
  height:487px;
  background:-webkit-linear-gradient(top, #ff4e42, #fd2d66);
  position:relative;
}
.back:after{
  content:"";
  display:block;
  width:647px;
  height:3px;
  position:absolute;
  top:50%;
  margin-top:-1px;
  background:-webkit-linear-gradient(left, rgba(255,255,255,0), rgba(255,255,255,0.2), rgba(255,255,255,0));
}
.line{
  content:"";
  display:block;
  height:447px;
  width:3px;
  position:absolute;
  background:-webkit-linear-gradient(top, rgba(255,255,255,0), rgba(255,255,255,0.2), rgba(255,255,255,0));
}
.line:nth-child(1){
  left:30%;
}
.line:nth-child(2){
  right:30%;
}