.obj-detail__top {
    position: relative;
}

.obj-detail__top-btn {
    position: absolute;
    top: 0;
    left: 0;
}
.h-submenu__col-block_bottom {
    position: absolute;
    left: 0;
    bottom: 0;
}
.h-submenu__col {
    position: relative;
}
.gchp .page-top {
    margin-bottom: 2em;
}
.gchp .page-description {
    font-size: 2em;
    margin-top: 1em;
}
@media screen and (max-width: 1000px) {
    .obj-detail__top-btn {
        top: -4.25em;
    }
}

@media screen and (max-width: 450px) {
    .obj-detail__top-btn {
        position: relative;
        top: 0;
    }
    .project-head__description-back {
        justify-content: flex-end;
    }
}