.article-text {
  line-height: 220%;
}
.subtitle {
  font-size: 22px;
  font-weight: bold;
  border-bottom: solid 3px #ff8c00;
  position: relative;
  margin-top: 20px;
  margin-bottom: 20px;
  padding-top: 20px;
  padding-bottom: 20px;
}

.subtitle:after {
  position: absolute;
  content: "";
  display: block;
  border-bottom: solid 3px #dc143c;
  bottom: -3px;
  width: 20%;
}
.subtitle2 {
  font-size: 22px;
  font-weight: bold;
  padding-left: 20px;
  position: relative;
  margin-top: 30px;
  margin-bottom: 30px;
  border-left: solid 3px #1421dc;
}
.btn-lp {
  display: inline-block;
  padding: 0.3em 1em;
  text-decoration: none;
  color: #67c5ff;
  border: solid 2px #67c5ff;
  border-radius: 3px;
  transition: 0.4s;
}

.btn-lp:hover {
  background: #67c5ff;
  color: white;
}
.pr-box {
  font-size: 28px;
  line-height: 260%;
  font-weight: bold;
}
.color-green {
  color: #5dade2;
}
.shiny-btn2 {
  display: block;
  position: relative;
  width: 80%;/*ボタンの幅*/
  padding: 10px 0;
  margin: 30px auto;
  background-color: #4548ed;/*ボタンの色*/
  box-shadow: 0 3px 0 0 rgb(100, 39, 198);/*影の色(rgbaの値を変更)*/
  border-radius: 5px;
  font-weight: bold;
  font-size: 18px;
  color: #fff;
  text-align: center;
  text-decoration: none;
  overflow: hidden;
}
.shiny-btn2:hover {
  text-decoration: none;
  color: #fff;
  box-shadow: none;
  -webkit-transform: translateY(3px);
}
.shiny-btn2::before {
  position: absolute;
  content: '';
  display: inline-block;
  top: -180px;
  left: 0;
  width: 30px;
  height: 100%;
  background-color: #fff;
  transition: 0.2s;
  animation: shiny-btn2 3s ease-in-out infinite;
}
@-webkit-keyframes shiny-btn2 {
  0% { -webkit-transform: scale(0) rotate(45deg); opacity: 0; }
  80% { -webkit-transform: scale(0) rotate(45deg); opacity: 0.5; }
  81% { -webkit-transform: scale(4) rotate(45deg); opacity: 1; }
  100% { -webkit-transform: scale(50) rotate(45deg); opacity: 0; }
}