.backtop-fade-enter-active[data-v-e4e21b5c],.backtop-fade-leave-active[data-v-e4e21b5c]{transition:opacity .2s ease}.backtop-fade-enter-from[data-v-e4e21b5c],.backtop-fade-leave-to[data-v-e4e21b5c]{opacity:0}