vant-fork/es/vant-css/collapse.css

Lightweight Mobile UI Components built on Vue

.van-collapse-item__title .van-cell__right-icon::before{-webkit-transition:.3s;transition:.3s;-webkit-transform:rotate(90deg);transform:rotate(90deg)}.van-collapse-item__title::after{visibility:hidden}.van-collapse-item__wrapper{overflow:hidden;will-change:height;-webkit-transition:height .3s ease-in-out;transition:height .3s ease-in-out}.van-collapse-item__content{padding:15px;background-color:#fff}.van-collapse-item--expanded .van-collapse-item__title .van-cell__right-icon::before{-webkit-transform:rotate(-90deg);transform:rotate(-90deg)}.van-collapse-item--expanded .van-collapse-item__title::after{visibility:visible}