.accordion {
  margin: 1em auto;
  width:70%;
  max-width: 70%;
  font-size:.9em;
}

@media screen and (max-width: 768px) {

.accordion {
  width:94%;
  max-width:94%;
}
.titles{
   font-size:.9em;
}}


.toggle {
  display: none;
}
.option {
  position: relative;
  margin-bottom: 1em;
}
.titles,
.acontents {
  -webkit-backface-visibility: hidden;
	backface-visibility: hidden;
    transform: translateZ(0);
    transition: all 0.7s;
}
.titles {
	border-bottom: solid 1px #ccc;
	padding: 1em;
	display: block;
	color: #333;
	font-weight: 300;
	cursor: pointer;
	padding:10px;
}



.titles:after, .titles:before {
  content: "";
  position: absolute;
  right: 1.25em;
  top: 1.25em;
  width: 1px;
  height: 0.75em;
  background-color: #999;
  transition: all 0.7s;
}
.titles:after {
  transform: rotate(90deg);
}




.acontents {
  max-height: 0;
  overflow: hidden;
}
.acontents p {
  margin: 0;
  padding: 0.5em 1em 1em;
  font-size: 0.9em;
  line-height: 1.5;
}
.toggle:checked + .titles + .acontents {
	max-height: 400px;
	transition: all .9s;
}
.toggle:checked + .titles:before {
	transform: rotate(90deg) !important;
}