.mitsu-lp {
  font-family: 'Noto Sans JP', sans-serif;
  background-color: black;
  margin: 0 auto;
  text-align: center;
  width: 100%;
　padding-top: 100px;
  padding-bottom: 150px;
}

.mitsu-lp .image-stack {
  position: relative;
  width: 100%;
  max-width: 1000px;
  margin: 40px auto 0 auto;
  aspect-ratio: 1000 / 1294;
}
.mitsu-lp .image-stack .background {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  position: absolute;
  left: 0; top: 0;
  z-index: 1;
}
.mitsu-lp .image-stack .foreground {
  position: absolute;
  left: 50%;
  top: 50%;
  width: 30%;
  height: 74.7%;
  transform: translate(-50%, -50%);
  z-index: 2;
  transition: 
    transform 1s cubic-bezier(.31,1.6,.6,1),
    box-shadow 1s;
  pointer-events: none;
}
.mitsu-lp img {
  max-width: 100%;
  height: auto;
  display: inline-block;
  vertical-align: middle;
  margin: 0 auto;
}
.mitsu-lp .maintitle {
  display: block;
  margin: 30px auto 180px auto;
}
.mitsu-lp .floating {
  position: relative;
  margin: 80px auto 40px auto;
  width: 80%;
  min-width: 140px;
  max-width: 300px;
  z-index: 10;
  transition:
    transform 0.7s cubic-bezier(.4,1.5,.7,1),
    box-shadow 0.5s;
  overflow: visible;
}
.mitsu-lp .floating img {
  width: 100%;
  display: block;
  margin: 0 auto;
  transform: scale(1.5);
  transform-origin: center;
}
.mitsu-lp .center-block {
  margin: 5% 0%;
  text-align: center;
}
.mitsu-lp .center-block.wide {
  margin: 1vw 0 5vw 0;
}
.mitsu-lp a {
  display: inline-block;
}

/* レスポンシブ対応 */
@media (max-width: 700px) {
  .mitsu-lp {
    font-size: 16px;
    padding: 0 2vw;
    padding: 0px 2vw 100px 2vw;
  }
  .mitsu-lp .image-stack {
    margin-top: 3vw;
  }
  .mitsu-lp .maintitle {
    margin-bottom: 40vw;
  }
  .mitsu-lp .center-block {
    margin: 3vw 0;
  }
  .mitsu-lp .center-block,
  .mitsu-lp .center-block.wide {
    margin: 4vw 0;
  }
  .mitsu-lp .center-block.wide {
    margin-bottom: 16vw;
  }
  .mitsu-lp .floating {
    width: 90vw;
    min-width: 100px;
    margin-top: 24vw;
    margin-bottom: 12vw;
  }
  .mitsu-lp .floating img {
    width: 100%;
    max-width: 100%;
    transform: scale(1.1);
  }
  .mitsu-lp a img {
    width: 80vw;
    max-width: 450px;
  }
}