.index_kv {
  width: 100%;
  height: auto;
  object-fit: cover;
  object-position: center;
  vertical-align: bottom;
}
h1 {
  text-align: center;
  font-size: 1em;
  color: #fff;
  background-color: #ff5555;
  margin: 0;
  font-family: YuMincho, "Yu Mincho", "Hiragino Mincho ProN", "serif";
  font-weight: bold;
}
.index_text {
  text-align: center;
  font-size: 0.8em;
  line-height: 1.4em;
  color: #000;
  margin: 20px auto;
  font-family: YuMincho, "Yu Mincho", "Hiragino Mincho ProN", "serif";
  font-weight: bold;
}
.index_text_sp {
  display: none;
}

.index_btn {
  display: flex;
  margin: 0 auto;
  width: 100%;
  max-width: 600px;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
}
.index_logo {
  display: block;
  margin: 20px auto 0 auto;
  width: 100%;
  max-width: 200px;
}
.copyright {
  text-align: center;
  font-size: 0.8em;
  color: #000;
  margin: 0;
  font-family: YuMincho, "Yu Mincho", "Hiragino Mincho ProN", "serif";
  font-weight: bold;
}
.index_kv_sp {
  display: none;
}
@media screen and (max-width: 600px) {
  .index_kv {
    display: none;
  }
  .index_kv_sp {
    display: block;
    width: 100vw;
    max-width: 100%;
    height: auto;
  }
  h1 {
    font-size: 16px;
  }
  .index_text_sp {
    display: block;
    font-size: 26px;
    text-align: center;
    margin: 16px auto;
    padding: 0 8px;
    font-family: "Kaisei Tokumin", serif;
    color: #ff5555;
  }
  .index_text {
    font-size: 16px;
    margin: 16px auto;
    padding: 0 8px;
  }
  .index_btn {
    flex-direction: row;
    flex-wrap: nowrap;
    justify-content: center;
    max-width: 100%;
    width: 100%;
  }
  .index_btn_enter img {
    width: 30vw;  }
  .index_btn_leave img {
    width: 30vw;
  }
  .index_btn18 {
    width: 15vw;
  }
  .index_logo {
    max-width: 140px;
    margin-top: 16px;
  }
  .copyright {
    font-size: 0.75em;
    padding: 10px 0;
  }
}