@media only screen and (max-width:640px){
    .lineup_detail {
        margin-top: 80px;
    }
    .lineup_detail main {
        width: calc(100% - 32px);
        padding: 0px 16px 0 16px;
        flex-wrap: wrap;
        flex-direction: column-reverse;
    }
    .detail_content {
        max-width: none;
        width: 100%;
        margin-left: 0px;
        margin-bottom: 65px;
    }
    .content_inner {
        flex-wrap: wrap;
    }
    .content_inner .slider-for {
        width: 100%;
        max-width:none;
        max-height: none;
        overflow: hidden;
        margin-bottom: 12px;
    }
    .content_inner .slider-for li {
        height: auto;
    }
    .content_inner .slider-for img {
        width: auto;
        max-width: 100%;
        max-height: 431px;
    }
    .content_inner .product_infolist {
        max-width: none;
        margin-left: 0px;
    }
    .content_inner .product_info {
        margin-left: 0px;
    }
    .product_info .product_scale {
        margin-bottom: 10px;
    }
    .product_info h1 {
        font-size: 24px;
        margin-bottom: 14px;
    }
    .product_info .product_detail td {
        padding: 14px 0px 14px 28px;
    }
    .product_lineup {
        margin-bottom: 35px;
    }
    .product_lineup p {
        margin-bottom: 20px;
    }
    .product_lineup .slide_nav li {
        width: calc(33.3vw - 18px);
        height: calc(33.3vw - 18px);
        margin-right: 10px;
        margin-bottom: 10px;
        border-radius: 9px;
    }
    .product_lineup .slide_nav li:nth-child(3n) {
        margin-right: 0px;
    }
    .back_btn a {
        width: 161px;
        height: 36px;
        border-radius: 18px;
        font-size: 12px;
    }
    .back_btn a::before {
        width: 4px;
        height: 7px;
        left: 14px;
        top: 14px;
    }
}