dvant/packages/dvant-css/src/collapse.css

A Vue.js 2.0 Mobile UI at dawnwin modified from Youzan

@import './common/var.css';

.van-collapse-item {
&__title {
.van-cell__right-icon::before {
  transition: .3s;
  transform: rotate(90deg);
}

&::after {
   visibility: hidden;
 }
}

&__content {
   padding: 15px;
   background-color: #fff;
 }

&--expanded {
.van-collapse-item__title {
.van-cell__right-icon::before {
  transform: rotate(-90deg);
}

&::after {
   visibility: visible;
 }
}
}
}