.add_cart {
    width: 300px;
}
.product_images {
    width: 400px;
}
.add_cart.w740 {
    width: 740px;
    float: inherit;
}
strong.price {
    color: red;
}
div#koucha {
    display: inline-block;
}
.koucha-contents {
    margin-top: 20px;
    float: left;
    margin-bottom: 20px;
}
.koucha-main {
    margin-bottom: 20px;
}
.koucha-main img {
    margin-bottom: 20px;
}