.history-sider:hover .history-sider-collapse[data-v-8dc12137],.scroll-ctr.show-scroll[data-v-8dc12137] .el-scrollbar__bar{opacity:1}.scroll-ctr[data-v-8dc12137] .el-scrollbar__bar{opacity:0;transition:opacity .3s ease-in-out}.nav-active .nav-loading[data-v-8dc12137]{display:none}