.stage{
  background-image: url("image/isi.png");
  background-size: cover;
  margin: 0px 20px;
  margin-bottom: 50px;
  padding: 1px 10px;
  padding-left: 2em;
}

.stage-text{
  background: rgba(220,220,220,1);
  padding: 20px 100px;
  margin: 0px 120px 30px 100px;
}

/*全体*/
.stage-intro{
    padding: 0;
    text-align: center;
}

.tutorial-label{
  width: 85%;
  border: ridge 2px gray;
  text-align: center;
  position: relative;
  z-index: 2;
}

.propeller-label{
  width: 85%;
  border: ridge 2px green;
  text-align: center;
  position: relative;
  z-index: 2;
}

@media (min-device-width:1025px){
  .stage-text{
    font-size: 1.5em;
  }

  .stage-description p{
    font-size: 1.5em;
  }
}

@media (max-device-width:1025px){
  .stage-text{
    font-size: 1.3em;
  }

  .stage-description p{
    font-size: 1.2em;
  }
}

.stage-description{
  display: inline-block;
  text-align: center;
  width: 85.3%;
}


.tutorial{
  margin-bottom: 50px;
  padding-bottom: 20px;
  z-index: 1;
  background: rgba(220,220,220,1);
  border: ridge 2px gray;
}

.propeller{
  padding-bottom: 20px;
  z-index: 1;
  background: rgba(200,255,200,1);
  border: ridge 2px green;
}

.image{
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  align-content: space-around;
}

.stage-image{
  width: 45%;
  border: ridge 2px black;
}

.boss-image{
  width: 30%;
  height: auto;
}