@charset "UTF-8";
html{
  font-size: 15px;
}
main{
  background-color: #F6F4EE;
  padding: 0 10vw;
}
header::before{
  content:"";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 0;
  border-style: solid;
 
  /*ここで三角形のサイズを決める。
  必ず幅100vwにして、ブラウザサイズいっぱいにしてください。*/

  border-width:  0 0 40px   100vw;
 
  border-color:  transparent  transparent #F6F4EE transparent   ;
  backface-visibility: hidden;
}
section{
  padding: 10vh 0;
}
.about-title{
  color: #004496;
  text-align: center;
  letter-spacing: 4px;
  line-height: 5vh;
  margin-bottom: 3vh;
}
section div h1{
  font-weight: normal;
  font-size: 2.0em;
}

.tag{
  background-color: #48B6FF;
  color: #FAFAFA;
  padding: 0 1.5%;
  margin-bottom: 3vh;
  font-size: 1.3em;
}
.about-box{
  margin-bottom: 5vh;
}
.about-box p{
  color: #101010;
  text-align: left;
  font-size: 1.2em;
}
.text{
  margin: 3vh 0;
}
.bold{
  font-weight: bold;
  display: block;
  padding-top: 3vh;
}
.flex-about{
  display: flex;
  justify-content: space-evenly;
}
.flex-about div{
  margin: 3vh 0;
  text-align: center;
  width: 35vw;
}
.flex-about div p{
  text-align: center;
}
section p{
  text-align: center;
  margin-top: 10vh;
}
.btn{
  background-color: #004496;
  color: #FAFAFA;
  border-radius: 30vh;
  padding: 1vh 2.5vw;
  text-decoration: none;
  align-items: center;

}
.btn:hover{
  background-color: #D5AA1B;
}
@media screen and (max-width: 820px){
  .about-box .flex{
    flex-direction: column;
  }
  .flex-about{
    flex-direction: column;
  }
  .flex-about div{
    margin: 3vh 0;
    text-align: center;
    width: 70vw;
  }
}