body #main{
  background-image: url('/themes/custom/cityu_dongguan_ui/templates/ui/images/layers/layer_blue_smaller.png');
}

body #main:after {
    content: '';
    display: block;
    position: absolute;
    width: 100%;
    height: 150px;
    left: 0px;
    bottom: 0;
    background-image: linear-gradient(
      180deg,
      rgba(0, 0, 0, 0) 0%,
      rgba(0, 0, 0, 0.35) 66%,
      rgba(0, 0, 0, 0)
    );
  }

body #content {
    position: relative;
    z-index: 1;
}