/* PC用 */
button.readmore {
  position: relative;
  width: 90px;
  height: 80px;
  display: block;
  padding-bottom: 40px;
  margin: 40px auto;
  color: #666;
  background-color: transparent;
  border: none;
  outline: 0;
  transition: .5s;
  -erbkit-transition: .5s;
}
button.readmore::after {
  content: " ";
  position: absolute;
  top: 25px;
  right: 28px;
  width: 30px;
  height: 30px;
  border-top: solid 3px #666;
  border-right: solid 3px #666;
  transform: rotate(135deg);
  -webkit-transform: rotate(135deg);
  transition: .5s;
  -erbkit-transition: .5s;
}
button.readmore:hover::after {
  top: 40px;
}

#text-wrap {
  width: 50%;
  height: 100%;
  display: block;
  padding: 70px;
  margin: 0 auto;
}

.hide-text {
  display: none;
}

.on-click {
  color: transparent!important;
}

.on-click {
  transform: rotate(-180deg);
  -webkit-transform: rotate(-180deg);
}

/* スマホ用 */
@media screen and (max-width:768px) {
  button.readmore {
    position: relative;
    width: 8.5rem;
    height: 7rem;
    display: block;
    padding-bottom: 3rem;
    margin: 3rem auto;
    color: #666;
    background-color: transparent;
    border: none;
    outline: 0;
    transition: .5s;
    -erbkit-transition: .5s;
  }
  button.readmore::after {
    content: " ";
    position: absolute;
    top: 2.5rem;
    right: 2.8rem;
    width: 3rem;
    height: 3rem;
    border-top: solid .3rem #666;
    border-right: solid .3rem #666;
    transform: rotate(135deg);
    -webkit-transform: rotate(135deg);
    transition: .5s;
    -erbkit-transition: .5s;
  }
  button.readmore:hover::after {
    top: 4rem;
  }

  #text-wrap {
    width: 50%;
    height: 100%;
    display: block;
    padding: 7rem;
    margin: 0 auto;
  }

  .hide-text {
    display: none;
  }

  .on-click {
    color: transparent!important;
  }

  .on-click {
    transform: rotate(-180deg);
    -webkit-transform: rotate(-180deg);
  }
}