offset 百度地图 bm-info-window bm-marker 弹窗偏移量

<bm-info-window
            :position="{ lng: spaceInfoWindow.lng, lat: spaceInfoWindow.lat }"
            :title="spaceInfoWindow.title"
            :show="spaceInfoWindow.show"
            :offset="{width: -20, height: -32}"
            @close="spaceInfoWindowClose"
            @open="spaceInfoWindowOpen"
          >
            <p v-text="spaceInfoWindow.contents"></p>
          </bm-info-window>