.sticky-cta-banner {
  position: fixed;
  right: 50px;
  bottom: 50px;
  z-index: 9999;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background-color: #1a3464;
  color: #f8cc7e;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.sticky-cta-banner a {
  color: #f8cc7e;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
}

.sticky-cta-banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hover-banner {
  transition:
    opacity 0.3s,
    transform 0.3s;
}

.hover-banner:hover {
  opacity: 0.85;
  transform: scale(1.05);
}

/* スマホ：サイズ縮小 */
@media (max-width: 768px) {
  .sticky-cta-banner {
    width: 100px;
    height: 100px;
    left: 16px;
    bottom: 55px;
  }
}