@media screen and (min-width: 767.99px) {
    .product-description_wrapper {
        /* margin: 1em calc(50% - 50vw); */
        margin: 0 calc(50% - 50vw);
        padding-top: 0px;
        text-align: center;
        line-height: 0; /* 避免圖片出現空白間隙 */
    }

    .product-description_wrapper img {
        width: 500px;
        text-align: center;
        vertical-align: middle;
    }
}

@media screen and (max-width: 768px) {
    .product-description_wrapper {
        /* margin: 1em calc(50% - 50vw); */
        margin: 0 calc(50% - 50vw);
        padding-top: 0px;
        text-align: center;
        line-height: 0; /* 避免圖片出現空白間隙 */
    }

    .product-description_wrapper img {
        width: 100%;
        vertical-align: middle;
    }
}