.top-firstview {
  width: 100%;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.top-firstview__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.top-firstview__placeholder {
  width: 100%;
  height: 100%;
  background: #000000;
}