#first_column {
    width: 50%;
    max-width: 500px;
}

#second_column {
    width: 50%;
    max-width: 450px;
    padding: 0 20px;
}

#item_detail {
    padding: 20px 0;
    line-height: 2;
}

#itemSelect {
    padding: 10px 0;
}

.shousai_detail {
    padding: 0 0 20px;
}

.item-index {
    max-width: 100%;
}

.item-index img {
    width: 70%;
    max-width: 600px;
}

.item-index p {
    font-size: 2rem;
    font-weight: bold;
    color: #B58C2A;
}

#price,
#price_del {
    font-size: 3rem;
    font-family: 'Shippori Mincho', serif;
    line-height: 1;
    letter-spacing: 0.1rem;
    color: #B58C2A;
}

#price span,
#price_del span {
    font-size: 1.5rem;
    font-family: 'Shippori Mincho', serif;
    line-height: 1;
    letter-spacing: 0.1rem;
    color: #B58C2A;
}

.purchaseButton__btn {
    font-family: 'Shippori Mincho', serif;
    background-color: #B58C2A;
    color: #fff;
    border: 2px solid #B58C2A;
    /* ボーダー */
    border-radius: 0;
    /* 角を丸めない */
    cursor: pointer;
    /* カーソルをポインタに */
    transition: background-color 0.3s, color 0.3s;
    /* ホバー時のアニメーション */
}

.purchaseButton__btn:hover {
    background-color: #fff;
    /* ホバー時の背景色 */
    color: #B58C2A;
    /* ホバー時のテキスト色 */
    font-weight: bold;
}

.small_img_box img {
    max-width: 100px;
    max-height: 100px;
    border: 5px solid #fff;
    box-sizing: border-box;
}

@media only screen and (min-width: 768px) and (max-width: 1000px) {
    #item_page_wrap {
        max-width: 700px;
        margin: auto;
        margin-top: 40px;
    }

    #first_column {
        width: 90%;
        max-width: none;
        margin: 20px auto;
    }

    #bx-pager {
        margin-top: 10px;
    }

    #second_column {
        width: 100%;
        max-width: none;
        padding: 20px 15px;
    }

    .small_img_box img {
        max-width: 70px;
        max-height: 70px;
    }
}

@media only screen and (max-width: 767px) {
    #first_column {
        width: 90%;
        max-width: none;
        margin: 20px auto;
    }

    #bx-pager {
        margin-top: 10px;
    }

    #second_column {
        width: 100%;
        max-width: none;
        padding: 20px 15px;
    }

    #item_detail {
        padding: 15px 0;
    }

    .item-index p {
        margin-top: 10px;
    }

    .small_img_box img {
        max-width: 55px;
        max-height: 55px;
    }
}