dw_lotter_draw/pages/share-poster/share-poster.wxss

.share-poster {
  height: 100%;
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  background: #6CBFFF;
}
.btn-save {
  height: 100rpx;
  width: 100%;
  position: absolute;
  bottom: 0;
  left: 0;
  background: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 34rpx;
  color: #52AAFF;
}
canvas {
  height: calc(100% - 100rpx);
  width: 100%;
}