@media screen and (max-width: 750px) {
    /* --- 前の言葉、後の言葉 要素:9、10 --- */
    .NR-nav-words {
        margin: 15px;
        border: 1px solid #ccc;
        border-width: 1px 0;
    }
    .NR-nav-words h2 {
        font-size: 14px;
        font-family: 'Hiragino Kaku Gothic Pro';
        color: #6f2718;
    }
    .NR-nav-words .list-simple-c {
        margin: 0;
    }
    .NR-nav-words .list-simple-c li {
        margin-top: 4px;
        line-height: 19px;
    }
    .NR-nav-words .NR-nav-words-prev {
        padding: 15px 0 15px 9px;
    }
    .NR-nav-words .NR-nav-words-next {
        padding: 15px 9px 15px 0;
        text-align: right;
    }
}