diff --git a/src/pages/explain/list.vue b/src/pages/explain/list.vue
index e220cab..7397ee8 100644
--- a/src/pages/explain/list.vue
+++ b/src/pages/explain/list.vue
@@ -38,7 +38,10 @@ import {
   navigateToGuideTopTab,
   type GuideTopTab
 } from '@/utils/guideTopTabs'
-import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
+import {
+  isEmbeddedInWechatMiniProgram,
+  navigateBackToWechatMiniProgram
+} from '@/utils/hostEnvironment'
 import { syncHostNavigationTitle } from '@/utils/hostNavigationTitle'
 import { explainGuideStopListUrl } from '@/utils/explainNavigation'
 
@@ -71,8 +74,6 @@ const buildExplainHallItems = (
 
 const shouldUseHostNavigation = computed(() => isEmbeddedInWechatMiniProgram())
 
-const GUIDE_HOME_URL = '/pages/index/index?tab=guide'
-
 type ExplainListHistoryState = {
   museumGuidePage?: 'explain-list'
   [key: string]: unknown
@@ -80,7 +81,7 @@ type ExplainListHistoryState = {
 
 let explainListHistoryPushed = false
 let isConsumingExplainListHistory = false
-let isReturningToGuideHome = false
+let isReturningFromExplainList = false
 
 type PageStackEntry = {
   route?: string
@@ -93,9 +94,8 @@ const getPageStack = () => (
   typeof getCurrentPages === 'function' ? getCurrentPages() as PageStackEntry[] : []
 )
 
-const guideHomeUrl = () => (
-  shouldUseHostNavigation.value ? guideTopTabUrl('guide') : GUIDE_HOME_URL
-)
+const guideHomeUrl = () => guideTopTabUrl('guide')
+const explainHomeUrl = () => guideTopTabUrl('explain')
 
 const isExplainListHistoryState = (state: unknown): state is ExplainListHistoryState => (
   Boolean(
@@ -106,7 +106,7 @@ const isExplainListHistoryState = (state: unknown): state is ExplainListHistoryS
 )
 
 const showGuideHomeReturnError = () => {
-  isReturningToGuideHome = false
+  isReturningFromExplainList = false
   uni.showToast({
     title: '返回导览首页失败，请重试',
     icon: 'none'
@@ -120,6 +120,13 @@ const reLaunchGuideHome = () => {
   })
 }
 
+const reLaunchExplainHome = () => {
+  uni.reLaunch({
+    url: explainHomeUrl(),
+    fail: showGuideHomeReturnError
+  })
+}
+
 const consumeExplainListHistory = () => {
   if (
     typeof window === 'undefined'
@@ -133,31 +140,55 @@ const consumeExplainListHistory = () => {
   return true
 }
 
-const returnToGuideHome = () => {
-  if (isReturningToGuideHome || isConsumingExplainListHistory) return
-  if (consumeExplainListHistory()) return
-
-  isReturningToGuideHome = true
+const getPreviousPage = () => {
   const pages = getPageStack()
-  const previousPage = pages.length > 1 ? pages[pages.length - 2] : null
-  const previousRoute = previousPage?.route || ''
+  return pages.length > 1 ? pages[pages.length - 2] : null
+}
+
+const cameFromProjectExplainHome = () => {
+  const previousPage = getPreviousPage()
   const previousTab = Array.isArray(previousPage?.options?.tab)
     ? previousPage.options.tab[0]
     : previousPage?.options?.tab
-  const canNavigateBackToGuideHome = (
-    !shouldUseHostNavigation.value
-    && previousRoute === 'pages/index/index'
-    && (!previousTab || previousTab === 'guide')
-  )
 
-  if (canNavigateBackToGuideHome) {
-    uni.navigateBack({
-      delta: 1,
-      fail: reLaunchGuideHome
-    })
+  return previousPage?.route === 'pages/index/index' && previousTab === 'explain'
+}
+
+const returnToProjectExplainHome = () => {
+  isReturningFromExplainList = true
+  uni.navigateBack({
+    delta: 1,
+    fail: reLaunchExplainHome
+  })
+}
+
+const returnFromStandaloneMiniProgramEntry = () => {
+  isReturningFromExplainList = true
+  if (navigateBackToWechatMiniProgram()) return
+
+  isReturningFromExplainList = false
+  uni.showToast({
+    title: '返回小程序失败，请重试',
+    icon: 'none'
+  })
+}
+
+const returnToGuideHome = () => {
+  if (isReturningFromExplainList || isConsumingExplainListHistory) return
+  if (consumeExplainListHistory()) return
+
+  // 首页讲解 Tab 是项目内入口，优先恢复原页面而不是退出小程序。
+  if (cameFromProjectExplainHome()) {
+    returnToProjectExplainHome()
     return
   }
 
+  if (shouldUseHostNavigation.value) {
+    returnFromStandaloneMiniProgramEntry()
+    return
+  }
+
+  isReturningFromExplainList = true
   reLaunchGuideHome()
 }
 
@@ -178,7 +209,7 @@ const pushExplainListHistory = () => {
 }
 
 const handleExplainListHistoryPopState = (event: PopStateEvent) => {
-  if (isReturningToGuideHome) return
+  if (isReturningFromExplainList) return
   if (!explainListHistoryPushed) return
 
   if (isExplainListHistoryState(event.state)) {
diff --git a/src/utils/hostEnvironment.ts b/src/utils/hostEnvironment.ts
index 02808a7..9f974d5 100644
--- a/src/utils/hostEnvironment.ts
+++ b/src/utils/hostEnvironment.ts
@@ -43,6 +43,28 @@ export const isEmbeddedInWechatMiniProgram = () => {
   return /miniProgram/i.test(window.navigator?.userAgent || '')
 }
 
+type WechatMiniProgramNavigationBridge = {
+  navigateBack?: (options: { delta: number }) => void
+}
+
+export const navigateBackToWechatMiniProgram = () => {
+  if (!isEmbeddedInWechatMiniProgram() || typeof window === 'undefined') return false
+
+  const bridge = (window as Window & {
+    wx?: { miniProgram?: WechatMiniProgramNavigationBridge }
+  }).wx?.miniProgram
+
+  if (typeof bridge?.navigateBack !== 'function') return false
+
+  try {
+    bridge.navigateBack({ delta: 1 })
+    return true
+  } catch (error) {
+    console.error('返回小程序失败:', error)
+    return false
+  }
+}
+
 export const isWechatMiniProgramRuntime = () => (
   isNativeWechatMiniProgram() || isEmbeddedInWechatMiniProgram()
 )
diff --git a/tests/e2e/explain-hall-page.spec.ts b/tests/e2e/explain-hall-page.spec.ts
index d773b2f..7e60d3e 100644
--- a/tests/e2e/explain-hall-page.spec.ts
+++ b/tests/e2e/explain-hall-page.spec.ts
@@ -66,7 +66,7 @@ test('hall goes directly to paged guide objects without outline requests', async
   expect(requests.filter((url) => url.includes('/stops/page')).map((url) => new URL(url).searchParams.get('pageNo'))).toEqual(['1', '2'])
 })
 
-test('embedded hall list exposes an H5 return control that keeps host markers', async ({ page }) => {
+test('embedded direct hall list delegates browser return to the host mini program', async ({ page }) => {
   await page.route('**/app-api/gis/guide/catalog/**', async (route) => {
     const url = route.request().url()
     if (url.includes('/catalog/halls?')) {
@@ -76,31 +76,38 @@ test('embedded hall list exposes an H5 return control that keeps host markers',
     await route.fulfill({ json: { code: 0, data: {} } })
   })
 
+  await page.addInitScript(() => {
+    document.documentElement.dataset.wechatNavigateBackCount = '0'
+    ;(window as Window & { wx?: unknown }).wx = {
+      miniProgram: {
+        navigateBack: () => {
+          const count = Number(document.documentElement.dataset.wechatNavigateBackCount || '0')
+          document.documentElement.dataset.wechatNavigateBackCount = String(count + 1)
+        }
+      }
+    }
+  })
+
   await page.goto('/#/pages/explain/list?embedded=wechat-mini-program&weapp=1')
-  const back = page.locator('.header-back')
-  await expect(back).toHaveCount(1)
-  await expect(back).toBeVisible()
+  await expect(page.locator('.header-back')).toHaveCount(0)
   await expect(page.locator('.hall-overview-card')).toHaveCount(1)
   for (const width of [375, 390, 430]) {
     await page.setViewportSize({ width, height: 844 })
     const layout = await page.locator('.explain-hall-select').evaluate((container) => {
-      const header = container.querySelector<HTMLElement>('.explain-page-header')
       const card = container.querySelector<HTMLElement>('.hall-overview-card')
-      if (!header || !card) throw new Error('missing header or hall card')
-      const headerRect = header.getBoundingClientRect()
+      if (!card) throw new Error('missing hall card')
       const cardRect = card.getBoundingClientRect()
       return {
         clientWidth: container.clientWidth,
         scrollWidth: container.scrollWidth,
-        headerBottom: headerRect.bottom,
         cardTop: cardRect.top
       }
     })
     expect(layout.scrollWidth).toBeLessThanOrEqual(layout.clientWidth)
-    expect(layout.cardTop).toBeGreaterThanOrEqual(layout.headerBottom)
+    expect(layout.cardTop).toBeGreaterThanOrEqual(0)
   }
-  await back.click()
-  await expect(page).toHaveURL(/#\/\?tab=guide&embedded=wechat-mini-program&weapp=1$/)
+  await page.evaluate(() => window.history.back())
+  await expect.poll(() => page.locator('html').getAttribute('data-wechat-navigate-back-count')).toBe('1')
 })
 
 test('ordinary H5 hall list return reaches the guide home', async ({ page }) => {
diff --git a/tests/unit/ExplainListNavigation.spec.ts b/tests/unit/ExplainListNavigation.spec.ts
index 440972c..a0b0341 100644
--- a/tests/unit/ExplainListNavigation.spec.ts
+++ b/tests/unit/ExplainListNavigation.spec.ts
@@ -6,7 +6,8 @@ import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
 import ExplainListPage from '@/pages/explain/list.vue'
 
 const hostEnvironmentMocks = vi.hoisted(() => ({
-  embeddedInWechatMiniProgram: false
+  embeddedInWechatMiniProgram: false,
+  navigateBackToWechatMiniProgram: vi.fn(() => false)
 }))
 
 const testState = vi.hoisted(() => ({
@@ -24,7 +25,8 @@ vi.mock('@dcloudio/uni-app', () => ({
 }))
 
 vi.mock('@/utils/hostEnvironment', () => ({
-  isEmbeddedInWechatMiniProgram: () => hostEnvironmentMocks.embeddedInWechatMiniProgram
+  isEmbeddedInWechatMiniProgram: () => hostEnvironmentMocks.embeddedInWechatMiniProgram,
+  navigateBackToWechatMiniProgram: () => hostEnvironmentMocks.navigateBackToWechatMiniProgram()
 }))
 
 vi.mock('@/usecases/explainUseCase', () => ({
@@ -60,6 +62,8 @@ const mountExplainList = () => mount(ExplainListPage, {
 
 beforeEach(() => {
   hostEnvironmentMocks.embeddedInWechatMiniProgram = false
+  hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReset()
+  hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReturnValue(false)
   testState.onLoadHandler = null
   testState.onBackPressHandler = null
   window.location.hash = '#/pages/explain/list'
@@ -78,9 +82,9 @@ afterEach(() => {
 })
 
 describe('讲解展厅列表返回', () => {
-  it('首页通过内部页面栈进入时，顶部返回使用 navigateBack 回到导览首页', async () => {
+  it('首页讲解 Tab 进入时，顶部返回使用 navigateBack 回到项目首页', async () => {
     vi.stubGlobal('getCurrentPages', vi.fn(() => [
-      { route: 'pages/index/index', options: { tab: 'guide' } },
+      { route: 'pages/index/index', options: { tab: 'explain' } },
       { route: 'pages/explain/list', options: {} }
     ]))
     const wrapper = mountExplainList()
@@ -94,6 +98,22 @@ describe('讲解展厅列表返回', () => {
     wrapper.unmount()
   })
 
+  it('小程序中的首页讲解 Tab 进入时仍优先回到项目首页', async () => {
+    hostEnvironmentMocks.embeddedInWechatMiniProgram = true
+    hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReturnValue(true)
+    vi.stubGlobal('getCurrentPages', vi.fn(() => [
+      { route: 'pages/index/index', options: { tab: 'explain' } },
+      { route: 'pages/explain/list', options: {} }
+    ]))
+    const wrapper = mountExplainList()
+
+    await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
+
+    expect(uni.navigateBack).toHaveBeenCalledWith(expect.objectContaining({ delta: 1 }))
+    expect(hostEnvironmentMocks.navigateBackToWechatMiniProgram).not.toHaveBeenCalled()
+    wrapper.unmount()
+  })
+
   it('页面栈只有展厅列表时使用 reLaunch 回到导览首页', async () => {
     const wrapper = mountExplainList()
 
@@ -106,8 +126,9 @@ describe('讲解展厅列表返回', () => {
     wrapper.unmount()
   })
 
-  it('独立页在微信嵌入态强制提供 H5 返回，并保留宿主识别参数', async () => {
+  it('小程序直达独立入口时返回小程序，而不是重启项目首页', async () => {
     hostEnvironmentMocks.embeddedInWechatMiniProgram = true
+    hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReturnValue(true)
     window.location.hash = '#/pages/explain/list?embedded=wechat-mini-program&weapp=1'
     window.history.replaceState({}, '', window.location.href)
     const wrapper = mountExplainList()
@@ -116,14 +137,14 @@ describe('讲解展厅列表返回', () => {
     await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
 
     expect(uni.navigateBack).not.toHaveBeenCalled()
-    expect(uni.reLaunch).toHaveBeenCalledWith(expect.objectContaining({
-      url: '/pages/index/index?tab=guide&embedded=wechat-mini-program&weapp=1'
-    }))
+    expect(hostEnvironmentMocks.navigateBackToWechatMiniProgram).toHaveBeenCalledTimes(1)
+    expect(uni.reLaunch).not.toHaveBeenCalled()
     wrapper.unmount()
   })
 
-  it('微信嵌入态即使前置页是导览首页也不调用宿主返回', async () => {
+  it('微信嵌入态从非讲解首页进入时返回小程序', async () => {
     hostEnvironmentMocks.embeddedInWechatMiniProgram = true
+    hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReturnValue(true)
     window.location.hash = '#/pages/explain/list?embedded=wechat-mini-program'
     window.history.replaceState({}, '', window.location.href)
     vi.stubGlobal('getCurrentPages', vi.fn(() => [
@@ -135,9 +156,8 @@ describe('讲解展厅列表返回', () => {
     await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
 
     expect(uni.navigateBack).not.toHaveBeenCalled()
-    expect(uni.reLaunch).toHaveBeenCalledWith(expect.objectContaining({
-      url: '/pages/index/index?tab=guide&embedded=wechat-mini-program'
-    }))
+    expect(hostEnvironmentMocks.navigateBackToWechatMiniProgram).toHaveBeenCalledTimes(1)
+    expect(uni.reLaunch).not.toHaveBeenCalled()
     wrapper.unmount()
   })
 
@@ -157,27 +177,11 @@ describe('讲解展厅列表返回', () => {
     wrapper.unmount()
   })
 
-  it('上一页是首页但不是导览 Tab 时重启到导览首页', async () => {
+  it('首页讲解 Tab 返回失败后重启到项目首页讲解 Tab', async () => {
     vi.stubGlobal('getCurrentPages', vi.fn(() => [
       { route: 'pages/index/index', options: { tab: 'explain' } },
       { route: 'pages/explain/list', options: {} }
     ]))
-    const wrapper = mountExplainList()
-
-    await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
-
-    expect(uni.navigateBack).not.toHaveBeenCalled()
-    expect(uni.reLaunch).toHaveBeenCalledWith(expect.objectContaining({
-      url: '/pages/index/index?tab=guide'
-    }))
-    wrapper.unmount()
-  })
-
-  it('navigateBack 失败后重启到导览首页', async () => {
-    vi.stubGlobal('getCurrentPages', vi.fn(() => [
-      { route: 'pages/index/index', options: { tab: 'guide' } },
-      { route: 'pages/explain/list', options: {} }
-    ]))
     vi.stubGlobal('uni', {
       navigateBack: vi.fn((options: { fail?: () => void }) => options.fail?.()),
       reLaunch: vi.fn(),
@@ -188,7 +192,7 @@ describe('讲解展厅列表返回', () => {
     await wrapper.get('[data-testid="explain-list-back"]').trigger('click')
 
     expect(uni.reLaunch).toHaveBeenCalledWith(expect.objectContaining({
-      url: '/pages/index/index?tab=guide'
+      url: '/pages/index/index?tab=explain'
     }))
     wrapper.unmount()
   })
@@ -210,8 +214,9 @@ describe('讲解展厅列表返回', () => {
     wrapper.unmount()
   })
 
-  it('根栈只创建一条历史标记，浏览器返回会回到导览首页', async () => {
+  it('小程序直达入口的浏览器返回会委托给小程序宿主', async () => {
     hostEnvironmentMocks.embeddedInWechatMiniProgram = true
+    hostEnvironmentMocks.navigateBackToWechatMiniProgram.mockReturnValue(true)
     window.location.hash = '#/pages/explain/list?embedded=wechat-mini-program&weapp=1'
     window.history.replaceState({}, '', window.location.href)
     const wrapper = mountExplainList()
@@ -225,12 +230,8 @@ describe('讲解展厅列表返回', () => {
 
     expect(uni.navigateBack).not.toHaveBeenCalled()
     expect(pushState).toHaveBeenCalledTimes(1)
-    const url = vi.mocked(uni.reLaunch).mock.calls[0]?.[0]?.url || ''
-    const query = new URLSearchParams(url.split('?')[1])
-    expect(url.split('?')[0]).toBe('/pages/index/index')
-    expect(query.get('tab')).toBe('guide')
-    expect(query.get('embedded')).toBe('wechat-mini-program')
-    expect(query.get('weapp')).toBe('1')
+    expect(hostEnvironmentMocks.navigateBackToWechatMiniProgram).toHaveBeenCalledTimes(1)
+    expect(uni.reLaunch).not.toHaveBeenCalled()
     wrapper.unmount()
   })
 
diff --git a/tests/unit/hostEnvironment.spec.ts b/tests/unit/hostEnvironment.spec.ts
index 3a82f05..dd0d522 100644
--- a/tests/unit/hostEnvironment.spec.ts
+++ b/tests/unit/hostEnvironment.spec.ts
@@ -1,5 +1,8 @@
 import { afterEach, describe, expect, it, vi } from 'vitest'
-import { isEmbeddedInWechatMiniProgram } from '@/utils/hostEnvironment'
+import {
+  isEmbeddedInWechatMiniProgram,
+  navigateBackToWechatMiniProgram
+} from '@/utils/hostEnvironment'
 
 const createWindow = (overrides: Record<string, unknown> = {}) => ({
   location: { search: '', hash: '' },
@@ -47,3 +50,24 @@ describe('微信小程序宿主环境识别', () => {
     expect(isEmbeddedInWechatMiniProgram()).toBe(false)
   })
 })
+
+describe('小程序宿主返回', () => {
+  it('嵌入态调用小程序 navigateBack', () => {
+    const navigateBack = vi.fn()
+    vi.stubGlobal('window', createWindow({
+      __wxjs_environment: 'miniprogram',
+      wx: { miniProgram: { navigateBack } }
+    }))
+
+    expect(navigateBackToWechatMiniProgram()).toBe(true)
+    expect(navigateBack).toHaveBeenCalledWith({ delta: 1 })
+  })
+
+  it('非嵌入态不会调用小程序返回桥接', () => {
+    const navigateBack = vi.fn()
+    vi.stubGlobal('window', createWindow({ wx: { miniProgram: { navigateBack } } }))
+
+    expect(navigateBackToWechatMiniProgram()).toBe(false)
+    expect(navigateBack).not.toHaveBeenCalled()
+  })
+})