.container {
  max-width: 100%;
}
.swiper-container {
  height: calc(100vh - 80px);
}
.swiper-wrapper .swiper-slide {
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  height: calc(100vh - 80px);
  overflow: hidden;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}
.mainv_ttl.mainv_ttl_coming_soon {
  text-align: center;
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: initial;
  height: 100%;
}
.mainv_ttl.mainv_ttl_coming_soon h2 {
  margin-bottom: 40px;
}
.swiper-button-prev,
.swiper-button-next {
  width: 20px;
}
.swiper-slide.swiper_coming_soon::before {
  content: "";
  background: #000;
  opacity: 0.2;
  width: 100%;
  height: 100%;
  display: block;
}
/* 画像に対してアニメーションを適用 */
.coming_soon_box img {
  /* アニメーション名 秒数 タイミング 繰り返し */
  animation: pulse 3s ease-in-out infinite;
}

/* アニメーションの内容（透明度の変化） */
@keyframes pulse {
  0% {
    opacity: 1; /* 最初はくっきり */
  }
  50% {
    opacity: 0.5; /* 3秒の半分（1.5秒）で薄くなる */
  }
  100% {
    opacity: 1; /* 最後はまたくっきり戻る */
  }
}

.mainv_ttl {
  position: absolute;
  bottom: 0;
  width: 100%;
  xbackground-color: rgb(0 0 0 / 25%);
  color: #fff;
  min-height: 200px;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  flex-flow: column;
  padding: 0 20px;
  text-align: left;
}
.mainv_ttl h2 {
  font-size: 2.6rem;
  line-height: 1.2em;
  width: 100%;
}
.mainv_ttl p {
  font-size: 1.25rem;
  font-weight: 300;
  line-height: 1.2em;
}

.mainv_ttl p.open {
  font-size: var(--size_2l);
  font-weight: 200;
}
span.mainv_caption {
  display: block;
  text-align: right;
  font-size: 14px;
  color: #fff;
  font-weight: 400;
}

.mainv_ttl.mainv_ttl_coming_soon h2 {
  max-width: 500px;
  width: 50vw;
}
.coming_soon_box {
  max-width: 320px;
  width: 30vw;
}
@media screen and (max-width: 1080px) {
  .swiper-container {
    xheight: 60vh;
  }
  .swiper-wrapper .swiper-slide {
    xheight: 60vh;
  }
  .mainv_ttl.mainv_ttl_coming_soon h2 {
    width: 320px;
  }
  .coming_soon_box {
    width: 200px;
  }
  .mainv_ttl p.open {
    font-size: var(--size_r);
  }
}

@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;
  }
  .swiper-button-prev,
  .swiper-button-next {
    width: 14px;
  }
}