body {
  background: url(https://timgsa.baidu.com/timg?image&quality=80&size=b9999_10000&sec=1546795949190&di=606f410f2c70dff0908f9352b4c05672&imgtype=0&src=http%3A%2F%2Fa.hiphotos.baidu.com%2Fzhidao%2Fpic%2Fitem%2F34fae6cd7b899e5177ed63a843a7d933c8950d2e.jpg);
  background-size: cover;
  background-repeat: no-repeat;
  color: #0F0;
  -ms-overflow-style: none;
  overflow: -moz-scrollbars-none;
}
body::-webkit-scrollbar {
  display: none;
}

.headerDis {
  color: #0F0;
}
a:visited,
a:link {
  color: #FFF;
}
#left {
  width: 90px;
  transition: all 1s;
}
#left:hover {
  width: 230px;
}
#calendar,
#leftcontentcontainer {
  display: none;
  transition: all 1s;
}
#left:hover {
  width: 230px;
}
#left:hover #calendar,
#left:hover #leftcontentcontainer {
  display: block;
}