.back-to-top-enter-active[data-v-ef77dcc0],.back-to-top-leave-active[data-v-ef77dcc0]{transition:all .3s ease}.back-to-top-enter-from[data-v-ef77dcc0],.back-to-top-leave-to[data-v-ef77dcc0]{opacity:0;transform:translateY(20px)}