message: docs(Calendar): add enUS document
diff: &__popup {
  height: 80%;
  +
  + .van-popup__close-icon {
  + top: 13px;
  + }
  }
  &__header {
  position: absolute;
  top: 50%;
  left: 50%;
  - z-index: -1;
  - color: @gray-2;
  + z-index: 0;
  + color: fade(@gray-2, 80%);
  font-size: 160px;
  transform: translate(-50%, -50%);
  pointer-events: none;
  left: 0;
  font-size: @font-size-xs;
  line-height: 14px;
  +
  + @media (max-width: 350px) {
  + font-size: 9px;
  + }
  }
  &__top-info {
  