.custom-carousel {
  position: relative;
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  overflow: hidden;
}
.carousel-slides {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 8; /* 横16:縦8などお好みで */
}
.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  opacity: 0;
  transition: opacity 0.6s;
  z-index: 1;
}
.carousel-slide.active {
  opacity: 1;
  z-index: 2;
}
.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.carousel-prev,
.carousel-next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: rgba(0, 0, 0, 0.3);
  color: #fff;
  border: none;
  font-size: 2em;
  padding: 0.2em 0.6em;
  cursor: pointer;
  z-index: 3;
}
@media (max-width: 500px) {
  .carousel-prev,
  .carousel-next {
    font-size: 1.2em;
    padding: 0.3em 0.4em;
  }
}
.carousel-prev {
  left: 10px;
}
.carousel-next {
  right: 10px;
}
.carousel-pagination {
  position: absolute;
  left: 50%;
  bottom: 15px;
  transform: translateX(-50%);
  display: flex;
  gap: 8px;
  z-index: 3;
}
.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: #fff;
  opacity: 0.5;
  cursor: pointer;
  border: 1px solid #888;
  transition: opacity 0.3s;
}
.carousel-dot.active {
  opacity: 1;
  background: #333;
}