body{
  height: 100vh;
}
#app {
  background-image: url(../../images/activity_bg.png);
  background-size: 100%;
  background-repeat: no-repeat;
  height: 100%;
  overflow-x: hidden;
  overflow-y: scroll; 
}
#app .van-nav-bar--fixed {
  position: static;

}
#app .van-nav-bar{
  /* background-color: rgb(0, 151, 255); */
}
#app .van-nav-bar__left {
  display: none;
}
.van-nav-bar__title {
	color: #FFF;
}