.common_banner_custttheme{
    background: url("../imgs/flight-bg.png");
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover; 
    z-index: 1;
}
.common_banner_custttheme::after{
    content: "";
    position: absolute;
    top: 0px;
    left: 0px;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(255,255,255,1), rgba(255,255,255,0.0));
    z-index: -1;
}
.common_banner_custttheme .banner_ttt{
    margin-bottom: -20px; 
}