main {
    box-sizing: content-box;
    min-height: 660px;
    padding-top: 66px;
}
.main_content {
    padding: 60px 0;
}
.item_list {
    padding-top: 50px;
}

@media screen and (max-width: 420px) {
    main {
        padding-top: 68px;
    }
    .main_content {
        padding: 32px 0;
    }
    .item_list {
        padding-top: 32px;
    }
}