.HomeSection {
    display: grid;
    /* headerのbox-shadowが18pxある */
    padding-top: 18px;
}

.HomeSection_MainBlock {
    display: grid;
    gap: 50px;
    /* padding-bottom: 50px; */
}

/**
 * 以下、SideBlockがある場合のスタイル
 */

/* .HomeSection {
    display: grid;
    grid-template-columns: 1fr 300px;
    grid-template-areas: "Main Side";
}

.HomeSection_MainBlock {
    display: grid;
    gap: 50px;
    grid-area: Main;
    padding-bottom: 50px;
}

.HomeSection_SideBlock {
    position: relative;
    border-left: 1px solid #ddd;
    grid-area: Side;
}

@media (max-width: 660px) {
    .HomeSection {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        grid-template-areas: 
            "Side"
            "Main";
    }
} */