header.masthead {    
    background-image: url("../img/communication.jpg");
}

    header.masthead .intro-text {
        padding-top: 100px;
    }

.logo_top{
    padding-top:200px;
}
img.logo {
    width: 300px;
}

@media (max-width:768px) {
    img.logo {
        width: 200px;
    }

    header.masthead .intro-text {
        padding-top: 50px;
    }
}