html,
body {
  font-family: "Hiragino Kaku Gothic ProN", "ヒラギノ角ゴ ProN W3", YuGothic,
    "Yu Gothic", "メイリオ", Meiryo, sans-serif;
  text-align: center;
}
a {
  text-decoration: none;
  color: #000000;
}
header {
  margin-top: 50px;
  width: 100%;
}
h1 img {
  width: 150px;
  height: auto;
}
h2 {
  text-align: center;
  font-size: 18px;
}
main {
  width: 95%;
  margin: 0 auto;
}

p {
  line-height: 1.5rem;
}

.is-show {
  display: block;
}
@media screen and (max-width: 768px) {
h1 img {
  width: 100px;
  height: auto;
}

  .tab-group {
    margin-top: 50px;
  }
  .tab {
    margin-right: 10px;
    margin-left: 10px;
    font-size: 15px;
  }
  .tab-text {
    font-size: 16px;
  }
  .panel_content {
    font-size: 13px;
  }
  .sp {
    display: block;
  }
}