.accordion > dt {
  border: 1px solid black;
  border-bottom: 0;
  padding: 10px;
  position: relative;
}
.accordion > dt::after {
  content: '\25BC';
  position: absolute;
  right: 20px;
  transition: .6s transform;
  top: 10px;
}
.accordion > dt.accordion-body-show::after {
  transform: rotate(180deg);
  transition: .6s transform;

}
.accordion > dd + dt {
  margin-top: -1px;
}
.accordion > dt + dd {
  border: 1px solid black;
  border-top: 0;
  margin: 0;
  max-height: 0;
  overflow: hidden;
  padding: 0 10px;
  transition: .3s max-height;
}
.accordion > dt + dd.accordion-body-show {
  transition: .3s max-height;
}