@import url("https://fonts.googleapis.com/css?family=Noto+Sans+JP&display=swap");
.intro_text div {
  position: relative;
}
.intro_text div p {
  opacity: 0;
}
.intro_text div:after {
  content: "";
  display: block;
  position: absolute;
  width: 0%;
  height: 100%;
  top: 0;
  left: 0;
  background: #2264bf;
}

@-webkit-keyframes open_cont {
  0% {
    width: 0;
  }
  50% {
    width: 100%;
    left: 0;
  }
  100% {
    width: 0%;
    left: 100%;
  }
}
@-o-keyframes open_cont {
  0% {
    width: 0;
  }
  50% {
    width: 100%;
    left: 0;
  }
  100% {
    width: 0%;
    left: 100%;
  }
}
@-moz-keyframes open_cont {
  0% {
    width: 0;
  }
  50% {
    width: 100%;
    left: 0;
  }
  100% {
    width: 0%;
    left: 100%;
  }
}
@keyframes open_cont {
  0% {
    width: 0;
  }
  50% {
    width: 100%;
    left: 0;
  }
  100% {
    width: 0%;
    left: 100%;
  }
}
@-webkit-keyframes text_in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-o-keyframes text_in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@-moz-keyframes text_in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@keyframes text_in {
  0% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
.open_contents .intro_text div p {
  -webkit-animation: text_in 0.3s ease-in 0.3s forwards;
  -moz-animation: text_in 0.3s ease-in 0.3s forwards;
  -o-animation: text_in 0.3s ease-in 0.3s forwards;
  animation: text_in 0.3s ease-in 0.3s forwards;
}
.open_contents .intro_text div:after {
  -webkit-animation: open_cont 0.6s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  -moz-animation: open_cont 0.6s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  -o-animation: open_cont 0.6s cubic-bezier(0.65, 0, 0.35, 1) forwards;
  animation: open_cont 0.6s cubic-bezier(0.65, 0, 0.35, 1) forwards;
}

/****************************************/
.intro_text {
  color: #004098;
  font-family: 'Noto Serif JP', serif;
  line-height: 2;
}
.intro_text p {
  margin-bottom: 2rem;
  letter-spacing: 0.1em;
}
.intro_text p span {
  letter-spacing: -0.2em;
}
.intro_text p.staff span {
  letter-spacing: 0.1em;
}
@media only screen and (min-width: 769px) {
  .intro_text {
    width: 720px;
    margin: auto;
    padding-top: 148px;
    padding-bottom: 140px;
    font-size: 16px;
  }
  .intro_text .lead {
    font-size: 30px;
  }
  .intro_text .staff {
    font-size: 14px;
  }
  .intro_text .staff span {
    font-size: 20px;
  }
}
@media only screen and (max-width: 768px) {
  .intro_text {
    margin: 0 5vw;
  }
  .intro_text p {
    font-size: 1.1rem;
  }
  .intro_text .lead {
    font-size: 1.4rem;
  }
  .intro_text .staff {
    font-size: 1rem;
  }
  .intro_text .staff span {
    font-size: 1.2rem;
  }
}