.site-header__content {
    background: url('/web/images/bg-tet.png') top left no-repeat;
    background-size: cover;
}

@media only screen and (min-width: 768px) {
    /*.site-header__content {
        background-image: url('/web/images/bg-tet.png');
        background-position: center top;
        background-size: auto;
    }*/
    .site-header__topbar{
    	background-color: rgba(255,255,255,0.4);
    }
}