.sub_banner::before {
    content: "";
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    opacity: 40%;
    position: absolute;
    background: url(../images/subbanner-backgroundimage.jpg);
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;

    
}