#banner {
    background-image: url('/assets/img/home/bg-banner.png');
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    height: calc(100vh - 70px);
}
#contact {
    background-image: url('/assets/img/home/support.jpg');
    background-size: 100%;
    background-repeat: no-repeat;
    background-position: center 30%;
}
#footer {
    background-image: url('https://abitstore.vn/assets/images/background-footer.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    padding-bottom: 25px;
}
@media screen and (max-width: 640px) {
    #banner {
        height: 350px;
    }
}