.fuwa-button {
  padding: 10px 18px;
  font-size: 14px;
  font-weight: bold;
  border-radius: 9999px;
  background: #fff4dd;
  text-decoration: none;
  display: inline-block;
  margin: 0.3em 0.5em 0.3em 0;
  transition: all 0.3s ease;
  animation: fuwa-in 0.6s ease-out;
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
  color: #000 !important;
}
.fuwa-button:hover {
  transform: scale(1.05);
  box-shadow: 0 6px 14px rgba(0,0,0,0.2);
}
.fuwa-button.amazon { background: #ffddee; }
.fuwa-button.rakuten { background: #fff0cc; }
.fuwa-button.yahoo { background: #ccf5f5; }
.fuwa-button.soundhouse { background: #e6f0ff; }

@keyframes fuwa-in {
  0% { transform: scale(0.9); opacity: 0; }
  100% { transform: scale(1); opacity: 1; }
}

@media screen and (max-width: 768px) {
  .fuwa-button {
    all: unset;
    font-size: 14px;
    color: #337ab7;
    text-decoration: underline;
    display: inline;
  }
}

.fuwa-credit {
  font-size: 11px;
  color: #666;
  opacity: 0.7;
  margin-top: 12px;
  line-height: 1.4;
  text-align: center;
  display: block;
  width: 100%;
}
.fuwa-credit .fuwa-by {
  font-size: 10px;
  color: #aaa;
  display: block;
}
.fuwa-credit .fuwa-by a {
  color: #aaa;
  text-decoration: none;
}
.fuwa-credit .fuwa-by a:hover {
  text-decoration: underline;
}