.fs-c-productPrice--listed + .fs-c-productPrice--selling > .fs-c-productPrice__main > .fs-c-productPrice__main__price,
.fs-c-productPrice--listed + .fs-c-productPrice--selling > .fs-c-productPrice__addon{
    color:#FF0000;
}



.fs-c-button--login,
.fs-c-button--memberRegister,
.fs-c-button--confirmRegister {
  display: inline-block;
  width: 100%;
  max-width: 360px;
  padding: 16px 24px;
  font-size: 18px;
  font-weight: bold;
  color: #fff;
  background-color: #f0c14b;
  border: 1px solid #a88734;
  border-radius: 8px;
  text-align: center;
  cursor: pointer;
  box-sizing: border-box;
  transition: background-color 0.3s ease;
  text-decoration: none;
}

.fs-c-button--login:hover,
.fs-c-button--memberRegister:hover,
.fs-c-button--confirmRegister:hover {
  background-color: #e2b33c;
}

@media (max-width: 480px) {
  .fs-c-button--login,
  .fs-c-button--memberRegister,
  .fs-c-button--confirmRegister {
    font-size: 16px;
    padding: 14px 20px;
    max-width: 100%;
  }
}


.responsive-img {
  width: 100%;
  height: auto;
}

@media (min-width: 768px) {
  .responsive-img {
    width: 70%;
    margin: 0 auto;
    display: block;
  }
}

<!--配送日時指定ボタンここから-->

/* 配布code03 */
/* 配送送料機能upgradeされていない店舗様はこちら */
.fs-body-checkout .fs-c-checkout-delivery__body .fs-c-buttonContainer--changeSmall {
    width: 100%;
}
.fs-body-checkout .fs-c-checkout-delivery__body .fs-c-buttonContainer--changeSmall .fs-c-button--change--small {
    background: #fff !important;
    border: 1px solid #000;
    color: #000;
    padding: 15px 0;
    width: 100%;
    box-sizing: border-box;
    cursor: pointer;
}
.fs-body-checkout .fs-c-checkout-delivery__body .fs-c-buttonContainer--changeSmall .fs-c-button__label {
    font-size: 0;
}
.fs-body-checkout .fs-c-checkout-delivery__body .fs-c-buttonContainer--changeSmall .fs-c-button__label::before {
    content: "お届け希望日／時間を設定する";
    font-size: 16px;
}
@media screen and (max-width: 767px) {
    .fs-body-checkout .fs-c-checkout-delivery__body .fs-c-buttonContainer--changeSmall {
        margin-top: 20px;
    }
}







/* 配布code03 */
/* 配送送料機能upgrade版を使用している店舗様はこちら */
.fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__deliveryDetail {
    grid-template-columns: 1fr !important;
}
.fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__button {
    grid-column: 1 !important;
}
.fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-button--change--small {
    background: #fff !important;
    border: 1px solid #000;
    color: #000;
    padding: 15px 0px;
    width: 100%;
    box-sizing: border-box;
    cursor: pointer;
}
.fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-button__label {
    font-size: 0;
}
.fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-button__label::before {
    content: "お届け希望日／時間を設定する";
    font-size: 16px;
}
@media screen and (max-width: 767px) {
    .fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__deliveryDetail {
        display: block;
    }
    .fs-body-checkout .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__button {
        margin-top: 20px;
    }
}



/* 上記で反映されない場合 */
.fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__deliveryDetail {
    grid-template-columns: 1fr !important;
}
.fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__button {
    grid-column: 1 !important;
}
.fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-button--change--small {
    background: #fff !important;
    border: 1px solid #000;
    color: #000;
    padding: 15px 0px;
    width: 100%;
    box-sizing: border-box;
    cursor: pointer;
}
.fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-button__label {
    font-size: 0;
}
.fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-button__label::before {
    content: "お届け希望日／時間を設定する";
    font-size: 16px;
}
@media screen and (max-width: 767px) {
    .fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__deliveryDetail {
        display: block;
    }
    .fs-body-checkout-multi .fs-c-checkout-shippingDetail .fs-c-checkout-shippingDetail__button {
        margin-top: 20px;
    }
}
<!--配送日時指定ボタンここまで-->