.collapse-item{
  margin-bottom: 4rem;
}
.collapse-item:last-child{
  margin-bottom: 0;
}
.collapse-head{
  display: flex;
  align-items: center;
  border: 1px solid var(--border-color);
  padding: 3.2rem;
  border-radius: 0.4rem;
  cursor: pointer;
}
.collapse-title{
  color: var(--blue);
  position: relative;
  padding-left: 3.2rem;
}
.collapse-title::before{
  position: absolute;
  content: "";
  left: 0;
  top: 0;
  bottom: 0;
  margin: auto 0;
  width: 1.8rem;
  height: 1.1rem;
  background: url(../images/icon-collapse-down.png);
  background-size: cover;
  background-position: center;
  -webkit-transition: all 0.3s;
  -moz-transition: all 0.3s;
  transition: all 0.3s;
}
.collapse-item.expand .collapse-title::before{
  -webkit-transform: rotate(-180deg);
  -moz-transform: rotate(-180deg);
  transform: rotate(-180deg);
}
.collapse-btn{
  display: none;
}
.collapse-item.expand .collapse-btn{
  display: block;
}
.collapse-body{
  display: none;
}
.collapse-inner{
  padding-top: 2.8rem;
}
@media(min-width:1360px) and (max-width:1403.98px){
  .collapse-item {
    margin-bottom: 3.2rem;
  }
  .collapse-head {
    padding: 2.8rem;
  }
  .collapse-inner {
    padding-top: 2.4rem;
  }
}
@media(min-width:1200px) and (max-width:1359.98px){
  .collapse-item {
    margin-bottom: 3.2rem;
  }
  .collapse-head {
    padding: 2.8rem;
  }
  .collapse-inner {
    padding-top: 2.4rem;
  }
}
@media(min-width:992px) and (max-width:1199.98px){
  .collapse-item {
    margin-bottom: 2.4rem;
  }
  .collapse-head {
    padding: 2.4rem;
  }
  .collapse-inner {
    padding-top: 2.4rem;
  }
}
@media(min-width:768px) and (max-width:991.98px){
  .collapse-item {
    margin-bottom: 2.4rem;
  }
  .collapse-head {
    padding: 2.4rem;
  }
  .collapse-inner {
    padding-top: 1.6rem;
  }
}
@media(max-width:767.98px){
  .collapse-item {
    margin-bottom: 1.6rem;
  }
  .collapse-head {
    flex-wrap: wrap;
    padding: 2rem;
  }
  .collapse-title {
    padding-left: 2.8rem;
    width: 100%;
  }
  .collapse-title::before {
    width: 1.5rem;
    height: 1rem;
  }
  .collapse-btn {
    margin-top: 1rem;
  }
}