@charset "UTF-8";

img {
  display: block;
  width: 100%;
}

main {
  margin-bottom: 80px;
}

h1 {
  width: 40%;
  margin: 80px auto;
}

.intro {
  width: 80%;
  font-size: 20px;
  text-align: left;
  margin: 0 auto 40px;
}

.intro-last {
  margin: 0 auto 80px;
}

.btn-box {
  text-align: center;
}

.to-portal-btn {
  display: inline-block;
  margin: 0 auto 40px;
  padding: 0.5em 1.5em;
  text-align: center;
  background-color: #aaaaaa;
  color: #fff;
  text-decoration: none;
  transition: 0.3s;
  font-size: 20px;
}

.to-portal-btn:hover {
  background-color: #060167;
}

.detail img {
  width: 80%;
  margin: 0 auto;
}

.announce-top {
  padding-bottom: 50px;
}

strong {
  font-weight: normal;
}

@media screen and (max-width:600px) {
  main {
    margin-bottom: 50px;
  }

  h1 {
    width: 55%;
    margin: 50px auto;
  }

  .intro {
    width: 90%;
    font-size: 16px;
  }

  .to-portal-btn {
  display: inline-block;
    padding: 0.5em 1em;
  font-size: 16px;
}

.to-portal-btn:hover {
  background-color: #060167;
}

  .detail img {
    width: 90%;
    margin: 0 auto;
  }

  .announce01 {
    padding-bottom: 30px;
  }

  .announce-top {
    padding-bottom: 50px;
  }

}

@media screen and (max-width:400px) {

  .announce-top {
    padding-bottom: 20px;
  }

}