diff --git a/src/pages/facility/detail.vue b/src/pages/facility/detail.vue
index 9a99158..b487ff2 100644
--- a/src/pages/facility/detail.vue
+++ b/src/pages/facility/detail.vue
@@ -8,6 +8,7 @@
     @back="handlePageBack"
   >
     <GuideMapShell
+      v-if="mapContextReady"
       :search-text="facility.name"
       search-top="20px"
       floor-bottom="153px"
@@ -70,6 +71,9 @@
         </view>
       </view>
     </GuideMapShell>
+    <view v-else class="detail-map-loading" data-testid="facility-map-loading">
+      <text class="detail-map-loading-text">正在准备位置预览...</text>
+    </view>
   </GuidePageFrame>
 </template>
 
@@ -117,6 +121,7 @@ const targetFocusRequest = ref<TargetPoiFocusRequestViewModel | null>(null)
 const targetFocusRequestId = ref(0)
 const locationErrorMessage = ref('')
 const resolutionLoadFailed = ref(false)
+const mapContextReady = ref(false)
 
 interface TargetPoiFocusResult {
   requestId: number | string
@@ -340,39 +345,40 @@ const tryResolveFacilityPoi = async () => {
 }
 
 onLoad(async (options: Record<string, unknown> = {}) => {
+  mapContextReady.value = false
   searchContext.value = parseFacilityDetailSearchContext(options)
   resolutionLoadFailed.value = false
-  await loadGuideFloors()
-
-  if (options.id) {
-    facility.value.id = decodeRouteText(options.id)
-  }
-
-  if (options.target) {
-    facility.value.name = decodeRouteText(options.target)
-  }
-
-  const requestedFloorId = decodeRouteText(options.floorId)
-    || searchContext.value.searchFloorId
-  if (requestedFloorId) {
-    requestedTargetFloorId.value = normalizeGuideFloorId(requestedFloorId)
-    if (requestedTargetFloorId.value) {
-      activeFloor.value = requestedTargetFloorId.value
-    }
-  }
-
-  const requestedFloorLabel = decodeRouteText(options.floorLabel)
-    || searchContext.value.searchFloorLabel
-  if (requestedFloorLabel) {
-    facility.value.floor = requestedFloorLabel
-  }
-
-  if (!facility.value.id && !options.target) {
-    locationErrorMessage.value = '未提供可定位的点位信息。'
-    return
-  }
-
   try {
+    await loadGuideFloors()
+
+    if (options.id) {
+      facility.value.id = decodeRouteText(options.id)
+    }
+
+    if (options.target) {
+      facility.value.name = decodeRouteText(options.target)
+    }
+
+    const requestedFloorId = decodeRouteText(options.floorId)
+      || searchContext.value.searchFloorId
+    if (requestedFloorId) {
+      requestedTargetFloorId.value = normalizeGuideFloorId(requestedFloorId)
+      if (requestedTargetFloorId.value) {
+        activeFloor.value = requestedTargetFloorId.value
+      }
+    }
+
+    const requestedFloorLabel = decodeRouteText(options.floorLabel)
+      || searchContext.value.searchFloorLabel
+    if (requestedFloorLabel) {
+      facility.value.floor = requestedFloorLabel
+    }
+
+    if (!facility.value.id && !options.target) {
+      locationErrorMessage.value = '未提供可定位的点位信息。'
+      return
+    }
+
     const poi = await tryResolveFacilityPoi()
     if (poi) {
       facility.value = toFacilityDetailViewModel(poi)
@@ -396,6 +402,9 @@ onLoad(async (options: Record<string, unknown> = {}) => {
   } catch (error) {
     console.error('加载设施位置详情失败:', error)
     locationErrorMessage.value = '位置数据加载失败，请稍后重试。'
+  } finally {
+    // 目标楼层与聚焦请求准备完成后再挂载 ThreeMap，避免默认楼层的中间帧。
+    mapContextReady.value = true
   }
 })
 
@@ -443,6 +452,20 @@ const handlePageBack = () => {
 </script>
 
 <style scoped lang="scss">
+.detail-map-loading {
+  position: absolute;
+  inset: 0;
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  background: #f3f3f3;
+}
+
+.detail-map-loading-text {
+  color: #424754;
+  font-size: 14px;
+}
+
 .detail-sheet {
   position: absolute;
   left: 84px;
diff --git a/src/pages/index/index.vue b/src/pages/index/index.vue
index bd240c4..0933b1d 100644
--- a/src/pages/index/index.vue
+++ b/src/pages/index/index.vue
@@ -428,6 +428,7 @@ const searchVisiblePoiIds = ref<string[] | null>(null)
 const searchTargetFocusRequest = ref<TargetPoiFocusRequestViewModel | null>(null)
 let searchTargetFocusRequestId = 0
 let pendingCollapseSearchAfterDetail = false
+let pendingSearchDetailFocusRequest: TargetPoiFocusRequestViewModel | null = null
 
 let launchOverlayFallbackTimer: ReturnType<typeof setTimeout> | null = null
 let launchOverlayFadeTimer: ReturnType<typeof setTimeout> | null = null
@@ -1358,10 +1359,23 @@ onShow(async () => {
   await nextTick()
   if (pendingCollapseSearchAfterDetail) {
     pendingCollapseSearchAfterDetail = false
+    const pendingFocusRequest = pendingSearchDetailFocusRequest
+    pendingSearchDetailFocusRequest = null
     await homeSearchPanelRef.value?.returnToCollapsedAfterDetail?.()
     homeSearchExpanded.value = false
     homeCategoryModeActive.value = false
     searchVisiblePoiIds.value = null
+    if (pendingFocusRequest) {
+      closeArrivalPanel()
+      showRoutePlanner.value = false
+      isSimulatingRoute.value = false
+      selectedGuidePoi.value = null
+      isPoiCardCollapsed.value = false
+      is3DMode.value = true
+      indoorView.value = 'floor'
+      activeGuideFloor.value = pendingFocusRequest.floorId
+      searchTargetFocusRequest.value = pendingFocusRequest
+    }
     return
   }
 
@@ -1455,16 +1469,8 @@ const createSearchDetailUrl = (poi: MuseumPoi, context: PoiSearchContext) => {
 }
 
 const handleHomeSearchResultTap = async (poi: MuseumPoi, context: PoiSearchContext) => {
-  closeArrivalPanel()
-  showRoutePlanner.value = false
-  isSimulatingRoute.value = false
-  selectedGuidePoi.value = null
-  isPoiCardCollapsed.value = false
-  is3DMode.value = true
-  indoorView.value = 'floor'
-  activeGuideFloor.value = poi.floorId
   searchTargetFocusRequestId += 1
-  searchTargetFocusRequest.value = toTargetFocusRequestViewModel({
+  pendingSearchDetailFocusRequest = toTargetFocusRequestViewModel({
     poiId: poi.id,
     name: poi.name,
     floorId: poi.floorId,
@@ -1478,13 +1484,14 @@ const handleHomeSearchResultTap = async (poi: MuseumPoi, context: PoiSearchConte
     entrances: poi.entrances
   }, searchTargetFocusRequestId)
 
-  // 先把楼层与目标请求交给地图，再进入详情页；返回时仅收起搜索 UI，不清焦点。
-  await nextTick()
+  // 详情页会一次性挂载目标楼层；首页不再先启动并销毁 ThreeMap。
+  searchTargetFocusRequest.value = null
   pendingCollapseSearchAfterDetail = true
   uni.navigateTo({
     url: createSearchDetailUrl(poi, context),
     fail: () => {
       pendingCollapseSearchAfterDetail = false
+      pendingSearchDetailFocusRequest = null
       uni.showToast({
         title: '点位详情打开失败，请重试',
         icon: 'none'
diff --git a/tests/unit/FacilityDetail.spec.ts b/tests/unit/FacilityDetail.spec.ts
index 2dad6d3..c76a6a6 100644
--- a/tests/unit/FacilityDetail.spec.ts
+++ b/tests/unit/FacilityDetail.spec.ts
@@ -143,6 +143,26 @@ afterEach(() => {
 })
 
 describe('点位详情实际渲染与返回闭环', () => {
+  it('解析目标楼层和点位后才挂载地图，避免默认楼层中间帧', async () => {
+    const wrapper = mountDetail()
+
+    expect(wrapper.find('[data-testid="guide-map-shell"]').exists()).toBe(false)
+    expect(wrapper.get('[data-testid="facility-map-loading"]').text()).toContain('正在准备位置预览')
+
+    await loadDetail({
+      id: encodeURIComponent(facilityPoi.id),
+      target: encodeURIComponent(facilityPoi.name),
+      floorId: facilityPoi.floorId,
+      floorLabel: facilityPoi.floorLabel
+    })
+
+    expect(wrapper.getComponent(GuideMapShellStub).props('activeFloor')).toBe('floor-l2')
+    expect(wrapper.getComponent(GuideMapShellStub).props('targetFocusRequest')).toMatchObject({
+      poiId: facilityPoi.id,
+      floorId: facilityPoi.floorId
+    })
+  })
+
   it('只展示真实详情字段，并向地图发送正确楼层与点位定位请求', async () => {
     const wrapper = mountDetail()
 
diff --git a/tests/unit/IndexPoiSearchFlow.spec.ts b/tests/unit/IndexPoiSearchFlow.spec.ts
index b686a42..b3c11c7 100644
--- a/tests/unit/IndexPoiSearchFlow.spec.ts
+++ b/tests/unit/IndexPoiSearchFlow.spec.ts
@@ -202,7 +202,7 @@ describe('首页搜索与地图闭环', () => {
     expect(map.props('visiblePoiIds')).toEqual(categoryContext.visiblePoiIds)
   })
 
-  it('分类结果进入详情并返回后收起搜索、清空 marker，但保留目标焦点与楼层', async () => {
+  it('分类结果进入详情时不触发首页地图，返回后才恢复目标焦点与楼层', async () => {
     const wrapper = await mountIndex()
     const search = wrapper.getComponent(PoiSearchPanelStub)
     const map = wrapper.getComponent(GuideMapShellStub)
@@ -215,13 +215,7 @@ describe('首页搜索与地图闭环', () => {
     search.vm.$emit('result-tap', poi, categoryContext)
     await flushPromises()
 
-    expect(map.props('activeFloor')).toBe('L2')
-    expect(map.props('targetFocusRequest')).toMatchObject({
-      poiId: poi.id,
-      floorId: 'L2',
-      floorLabel: '2F',
-      positionGltf: poi.positionGltf
-    })
+    expect(map.props('targetFocusRequest')).toBeNull()
 
     const navigateTo = vi.mocked(uni.navigateTo)
     const detailUrl = navigateTo.mock.calls[0]?.[0]?.url as string
@@ -298,7 +292,7 @@ describe('首页搜索与地图闭环', () => {
     expect(testState.searchCollapseAfterDetailCount).toBe(0)
     expect(testState.searchRestoreCount).toBe(1)
     expect(map.props('visiblePoiIds')).toEqual(categoryContext.visiblePoiIds)
-    expect(map.props('targetFocusRequest')).toMatchObject({ poiId: poi.id })
+    expect(map.props('targetFocusRequest')).toBeNull()
   })
 
   it('地图点位卡隐藏首页 dock 时仍保留搜索组件，关闭后可继续使用原列表', async () => {
@@ -342,7 +336,7 @@ describe('首页搜索与地图闭环', () => {
 
     const detailUrl = vi.mocked(uni.navigateTo).mock.calls[0]?.[0]?.url as string
     expect(new URLSearchParams(detailUrl.split('?')[1]).get('resultCount')).toBe('1')
-    expect(map.props('targetFocusRequest')).not.toBeNull()
+    expect(map.props('targetFocusRequest')).toBeNull()
 
     search.vm.$emit('cancel')
     await wrapper.vm.$nextTick()