.alternate_slides section {
    display: flex;
    flex-wrap: wrap;
}

.alternate_slides section:nth-child(even) {
    flex-direction: row-reverse;
}

.alternate_slides section:not(:first-of-type) {
    padding-top: 0;
}

.alternate_slides section:not(:last-of-type) {
    padding-bottom: 0;
}

@media screen and (max-width: 480px) {
    .alternate_slides .parallax-section {
        background-size: cover !important;
    }
}