diff --git a/src/pages/explain/list.vue b/src/pages/explain/list.vue
index 4b27db1..e1d2bdb 100644
--- a/src/pages/explain/list.vue
+++ b/src/pages/explain/list.vue
@@ -42,6 +42,7 @@ import {
 import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
 import { explainGuideStopListUrl } from '@/utils/explainNavigation'
 import { returnToWechatMiniProgram } from '@/services/WechatMiniProgramBridgeService'
+import { syncHostNavigationTitle } from '@/utils/hostNavigationTitle'
 
 const explainHallItems = ref<ExplainHallSelectItem[]>([])
 const explainLoading = ref(false)
@@ -236,6 +237,7 @@ const loadExplainHalls = async () => {
 }
 
 onLoad(() => {
+  if (shouldUseHostNavigation.value) syncHostNavigationTitle('免费讲解')
   pushExplainListHistory()
   void loadExplainHalls()
 })
diff --git a/src/pages/index/index.vue b/src/pages/index/index.vue
index 0240273..6e07a26 100644
--- a/src/pages/index/index.vue
+++ b/src/pages/index/index.vue
@@ -1032,6 +1032,11 @@ const syncTopTabToUrl = (tabId: GuideTopTab) => {
   }
 }
 
+const syncEmbeddedHostNavigationTitle = (tabId: GuideTopTab) => {
+  if (!isEmbeddedInWechatMiniProgram()) return
+  syncHostNavigationTitle(tabId === 'explain' ? '免费讲解' : '地图导览')
+}
+
 const isPoiSearchOverlayHistoryState = (state: unknown): state is PoiSearchOverlayHistoryState => (
   Boolean(
     state
@@ -1133,6 +1138,7 @@ const handleTabChange = (tabId: GuideTopTab) => {
   }
 
   currentTab.value = tabId
+  syncEmbeddedHostNavigationTitle(tabId)
   syncTopTabToUrl(tabId)
   loadTopTabData(tabId)
 
@@ -1160,11 +1166,13 @@ const syncTopTabFromHash = () => {
       closeArrivalPanel()
     }
     syncTopTabToUrl(tab)
+    syncEmbeddedHostNavigationTitle(tab)
     return
   }
 
   syncTopTabToUrl(currentTab.value)
   loadTopTabData(currentTab.value)
+  syncEmbeddedHostNavigationTitle(currentTab.value)
 }
 
 onMounted(() => {
@@ -1173,10 +1181,6 @@ onMounted(() => {
 
   if (typeof window === 'undefined') return
 
-  if (isEmbeddedInWechatMiniProgram()) {
-    syncHostNavigationTitle('地图导览')
-  }
-
   stopOutdoorMapAvailabilitySubscription = subscribeOutdoorMapAvailability(handleOutdoorMapUnavailable)
   void refreshOutdoorMapAvailability()
   syncTopTabFromHash()
diff --git a/tests/unit/ExplainListNavigation.spec.ts b/tests/unit/ExplainListNavigation.spec.ts
index 4eed816..8efdce6 100644
--- a/tests/unit/ExplainListNavigation.spec.ts
+++ b/tests/unit/ExplainListNavigation.spec.ts
@@ -13,6 +13,10 @@ const miniProgramBridgeMocks = vi.hoisted(() => ({
   returnToWechatMiniProgram: vi.fn()
 }))
 
+const hostNavigationTitleMocks = vi.hoisted(() => ({
+  syncHostNavigationTitle: vi.fn()
+}))
+
 const testState = vi.hoisted(() => ({
   onLoadHandler: null as null | (() => void),
   onBackPressHandler: null as null | (() => boolean)
@@ -35,6 +39,10 @@ vi.mock('@/services/WechatMiniProgramBridgeService', () => ({
   returnToWechatMiniProgram: miniProgramBridgeMocks.returnToWechatMiniProgram
 }))
 
+vi.mock('@/utils/hostNavigationTitle', () => ({
+  syncHostNavigationTitle: hostNavigationTitleMocks.syncHostNavigationTitle
+}))
+
 vi.mock('@/usecases/explainUseCase', () => ({
   explainUseCase: {
     loadExplainHalls: async () => [],
@@ -69,6 +77,7 @@ const mountExplainList = () => mount(ExplainListPage, {
 beforeEach(() => {
   hostEnvironmentMocks.embeddedInWechatMiniProgram = false
   miniProgramBridgeMocks.returnToWechatMiniProgram.mockResolvedValue({ status: 'not-embedded' })
+  hostNavigationTitleMocks.syncHostNavigationTitle.mockReset()
   testState.onLoadHandler = null
   testState.onBackPressHandler = null
   window.location.hash = '#/pages/explain/list'
@@ -123,7 +132,11 @@ describe('讲解展厅列表返回', () => {
     window.history.replaceState({}, '', window.location.href)
     const wrapper = mountExplainList()
 
+    testState.onLoadHandler?.()
+    await flushPromises()
+
     expect(wrapper.getComponent(ExplainHallSelectStub).props('forceInternalHeader')).toBe(false)
+    expect(hostNavigationTitleMocks.syncHostNavigationTitle).toHaveBeenCalledWith('免费讲解')
     await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
     await flushPromises()
 
diff --git a/tests/unit/IndexLaunchOverlay.spec.ts b/tests/unit/IndexLaunchOverlay.spec.ts
index dbd7495..e6a4c73 100644
--- a/tests/unit/IndexLaunchOverlay.spec.ts
+++ b/tests/unit/IndexLaunchOverlay.spec.ts
@@ -11,6 +11,14 @@ const testState = vi.hoisted(() => ({
   onShowHandler: null as null | (() => Promise<void> | void)
 }))
 
+const hostEnvironmentMocks = vi.hoisted(() => ({
+  embeddedInWechatMiniProgram: false
+}))
+
+const hostNavigationTitleMocks = vi.hoisted(() => ({
+  syncHostNavigationTitle: vi.fn()
+}))
+
 vi.mock('@dcloudio/uni-app', () => ({
   onLoad: vi.fn(),
   onShow: (handler: () => Promise<void> | void) => {
@@ -19,7 +27,11 @@ vi.mock('@dcloudio/uni-app', () => ({
 }))
 
 vi.mock('@/utils/hostEnvironment', () => ({
-  isEmbeddedInWechatMiniProgram: () => false
+  isEmbeddedInWechatMiniProgram: () => hostEnvironmentMocks.embeddedInWechatMiniProgram
+}))
+
+vi.mock('@/utils/hostNavigationTitle', () => ({
+  syncHostNavigationTitle: hostNavigationTitleMocks.syncHostNavigationTitle
 }))
 
 const modelSource = {
@@ -107,7 +119,9 @@ beforeEach(() => {
   testState.threeMapMountCount = 0
   testState.threeMapUnmountCount = 0
   testState.onShowHandler = null
-  window.history.replaceState({}, '', '/#/pages/index/index?tab=guide')
+  hostEnvironmentMocks.embeddedInWechatMiniProgram = false
+  hostNavigationTitleMocks.syncHostNavigationTitle.mockReset()
+  window.location.hash = '#/pages/index/index?tab=guide'
   vi.stubGlobal('uni', {
     navigateTo: vi.fn(),
     navigateBack: vi.fn(),
@@ -124,6 +138,16 @@ afterEach(() => {
 })
 
 describe('首页启动遮罩与馆内模型生命周期', () => {
+  it('嵌入小程序打开讲解首页时同步免费讲解标题', async () => {
+    hostEnvironmentMocks.embeddedInWechatMiniProgram = true
+    window.location.hash = '#/pages/index/index?tab=explain&embedded=wechat-mini-program'
+
+    const wrapper = await mountIndex()
+
+    expect(hostNavigationTitleMocks.syncHostNavigationTitle).toHaveBeenCalledWith('免费讲解')
+    wrapper.unmount()
+  })
+
   it('12 秒超时后仍保持 indoor，且不会挂载 TencentMap', async () => {
     const wrapper = await mountIndex()