.p-page__wrap .p-shop__header a {
  display: block;
  width: 328px;
  height: 40px;
  margin: 0 auto;
  overflow: hidden;
  text-decoration: none;
  text-indent: -9999px;
  background: url(https://img21.shop-pro.jp/PA01475/912/etc/logo_br.png) no-repeat 0 0;
  background-size: 328px 40px;
}

@media only screen and (max-width: 768px) {
  .p-page__wrap .p-shop__header a {
    width: 280px;
    height: 34px;
    background-size: 280px 34px;
  }
}