.container {
  max-width: 100%;
}
.swiper-container {
  height: calc(100vh - 100px);
}
.swiper-wrapper .swiper-slide {
  background-position: top center;
  background-size: cover;
  background-repeat: no-repeat;
  height: calc(100vh - 100px);
  overflow: hidden;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.swiper-button-prev,
.swiper-button-next {
  width: 20px;
}

.mainv_ttl {
  position: absolute;
  top: 50%;
  left: 50%;
  color: #fff;
  width: 100%;
  text-align: center;
  transform: translate(-50%, -50%);
}
.mainv_ttl h2 {
}
.mainv_ttl p {
  font-size: 40px;
  font-weight: 400;
  text-shadow: 4px 4px 4px rgb(0 0 0 / 25%);
  line-height: 1.4em;
}
span.mainv_caption {
  display: block;
  text-align: right;
  font-size: 14px;
  color: #fff;
  font-weight: 400;
}

@media screen and (max-width: 1080px) {
  .swiper-container {
    height: 60vh;
  }
  .swiper-wrapper .swiper-slide {
    height: 60vh;
  }
}

@media screen and (max-width: 480px) {
  /* 480px以下に適用されるCSS（スマホ用） */
  .swiper-wrapper .swiper-slide {
    height: auto;
  }
  .mainv_ttl h2 {
    font-size: 1.2rem;
  }
  .mainv_ttl p {
    font-size: 16px;
  }
  span.mainv_caption {
    font-size: 12px;
  }
  .swiper-button-prev,
  .swiper-button-next {
    width: 14px;
  }
}