.btn_flex {
    display: flex;
    justify-content: center;
}
.rakuten-btn {
    margin: 0px auto 30px auto;
    border: solid 2px #707070;
    border-radius: 60px;
    width: 325px;
    background-color: #fff;
    padding: 5px;
    text-align: center;
}
.rakuten-btn img {
    height: auto;
    max-width: 94%;
    vertical-align: top;
    border: none;
}
.amazon-btn {
    margin: 0px auto 30px auto;
    border: solid 2px #707070;
    border-radius: 60px;
    width: 325px;
    background-color: #fff;
    padding: 5px;
    text-align: center;
}
.amazon-btn img {
    height: auto;
    max-width: 94%;
    vertical-align: top;
    border: none;
}
@media screen and (max-width: 768px) {
.btn_flex {
    display: block;
}
}