[v-cloak] { display: none; }
@media screen and (min-width: 768px) {
  body { width: 768px; margin: 0 auto; background-color: #777; }
  .van-nav-bar, .van-tabbar { max-width: 768px; }
}
@media screen and (max-width: 767px) {
  body { width: 100%; }
}
body { margin: 0; min-height: 100vh; }
#app { min-height: 100vh; }
.app-container { height: 100vh; overflow: hidden; background-color: #f7f8fa; }
.content { height: calc(100vh - 96px - 50px); overflow-y: auto; background-color: #f7f8fa; padding-bottom: 50px; }
.van-nav-bar { z-index: 999; }