body{
    background-color: rgb(0, 0, 0);
}
.box-back{
    text-align: center;
    width: 100%;
}
.background-img{
    width: 50%;
    user-select: none;
}

@media screen and (max-width: 1366px) {
    .background-img{
        width: 90%;
    }
}