.l-content__main {
    position: static !important; //色々と重要
    width: 100%;

    [data-sidebar="on"] & {

        @include pc {
            width: calc(100% - 368px);
            max-width: 100%; //l-artcileが狭い時を考慮
        }
    }
}

.l-content__main__body {

    & > :first-child {
        margin-top: 0 !important;
    }

    & > :last-child {
        margin-bottom: 0 !important;
    }
}