.section.product .overview::after, 
.section.product .overview::before {
    background: #1C1C1C;
}
.section.product .overview h2 {
    font-size: 35px;
    font-weight: bold;
    text-align: center;
    padding: 10px 0;
}
.section.product .overview h2 span {
    font-size: 30px;
    padding-left: 10px;
}
.section.product .product_area {
    position: relative;
}
.section.product .product {
    width: 70%;
    margin: 0 auto;
    margin-bottom: 280px;
    position: relative;
}
.section.product .product .img {
    width: 80%;
    margin: 0 auto;
    transition: .3s;
    opacity: 0;
}
.section.product .product .img.show {
    opacity: 1;
}
.section.product .product .img img {
    width: 100%;
    object-fit: contain;
    position: relative;
}
.section.product .product .img .hide {
    position: absolute;
    top: 0;
    width: 80%;
    height: 100%;
    margin: 0 auto;
    z-index: 2;
    background: #1e1e37;
    transition: .7s;
}
.section.product .product_area .line {
    position: absolute;
    bottom: -10%;
    left: 0;
    height: 90%;
    width: 100%;
    background: #f5f5f5;
    transition: .7s;
    transform-origin: left;
    transform: scaleX(0);

}
.section.product .product_area .line.show {
    transform: scaleX(1);
}
.section.product .product_area .line.left {
    transform-origin: right;
    bottom: unset;
    left: unset;
    top: 20%;
    right: 0;
}
   
.section.product .product div ul.hide {
    background: unset!important;
    display: flex;
}
.section.product .product.right .hide.show {
    opacity: 0;
}
.section.product .product.center .hide.show {
    opacity: 0;
}
.section.product .product.plain ul.hide li,
.section.product .product.left ul.hide li {
    width: 10%;
    background: #1e1e37;
    transition: .3s;
    transform: scaleX(1) 
}
.section.product .product ul.hide li.show {
    transform: scaleX(0)
}
.section.product .product.plain,
.section.product .product.right {
     margin-left: 30%;
}
.section.product .product.left {
    margin-right: 30%;
}
.section.product .product .explanation {
    position: absolute;
    top: 0;
    left: -39%;
    display: inline-block;
    width: 45%;
    padding: 20px 10px 60px;
    opacity: 0;
    transition: .7s;
}
.section.product .product .explanation.show {
    opacity: 1;
    transform: translate3d(0,0,0);
    left: -34%;
}
.section.product .product .explanation h2 {
    font-size: 40px;
    font-weight: bold;
    text-align: center;
    margin-bottom: 40px;
}
.section.product .product .explanation h2 span {
    font-size: 30px;
    padding-left: 10px;
}
.section.product .product.left .explanation {
    right: -39%;
    left: unset;
}
.section.product .product.left .explanation.show {
    right: -34%;
    left: unset;
}
.section.product .product .explanation span,
.section.product .product .explanation p label,
.section.product .product .explanation p {
    font-size: 14px;
    font-weight: bold;
    width: 80%;
    margin: 0 auto;
}
.section.product .product .explanation p label {
    font-size: 16px;
}
.section.product .product .explanation label.sub {
    font-size: 11px;
}
.section.product .product .explanation span {
    font-size: 11px;
}
@media screen and (min-width: 1300px) {
    .section.product .product .explanation h2  {
        font-size: 3vw;
    }
    .section.product .product .explanation h2 span  {
        font-size: 2.8vw;
    }
    .section.product .product .explanation p {
        font-size: 1.2vw;
    }
    .section.product .product .explanation p label {
        font-size: 1.4vw;
    }
    .section.product .product .explanation label.sub {
        font-size: 1.1vw;
    }
    .section.product .product .explanation span {
        font-size: 0.9vw;
    }
}
@media screen and (max-width: 768px) {
    .section.product {
        margin-left: 0;
    }
    .section.product .product {
        width: unset;
        margin-bottom: 250px;
        display: flex;
        flex-direction: column;
        padding: 5%;
        
    }
    .section.product .product_area .line.left,
    .section.product .product_area .line {
        height: 95%;
        bottom: unset;
        top: 0;
    }
    .section.product .product.left,
    .section.product .product.plain, 
    .section.product .center,
    .section.product .product.right {
        margin-left: 0;
        margin-right: 0;
        margin-bottom: 0;
    }
    .section.product .product .img {
        width: 100%;
        position: relative;
    }
    .section.product .product .explanation {
        position: unset;
        width: 100%;
    }
    .section.product .product .img .hide {
        width: 100%;
        height: 100%;
    }
    .section.product .product .explanation h2 {
        font-size: 28px;
        margin-bottom: 18px;
    }
    .section.product .product .explanation h2 span {
        font-size: 24px;
    }
    .section.product .product .explanation p {
        width: 90%;
        font-size: 15px;
        line-height: 27px;
    }
    .section.product .overview h2 {
        font-size: 24px;
    }
    .section.product .overview h2 span {
        font-size: 20px;
    }
    .br_pc {
        display: none;
    }
}