diff --git a/src/components/map/ThreeMap.vue b/src/components/map/ThreeMap.vue
index dd0b6f8..214318b 100644
--- a/src/components/map/ThreeMap.vue
+++ b/src/components/map/ThreeMap.vue
@@ -69,6 +69,12 @@ import {
   guideModelLoadManager,
   type GuideModelResourceSet
 } from '@/services/model/GuideModelLoadManager'
+import {
+  GuideAutoSwitchStateMachine,
+  type GuideAutoSwitchDirection,
+  type GuideAutoSwitchInputSource,
+  type GuideAutoSwitchRequest
+} from './guideAutoSwitchStateMachine'
 
 type ViewMode = 'overview' | 'floor' | 'multi'
 type CameraPreset = 'top' | 'oblique'
@@ -193,6 +199,7 @@ interface CameraFitOptions {
   targetOffsetRatio?: THREE.Vector3
   screenOffsetRatio?: THREE.Vector2
   up?: THREE.Vector3
+  onComplete?: () => void
 }
 
 interface LoadFloorOptions {
@@ -337,8 +344,6 @@ const props = withDefaults(defineProps<{
   showRoute?: boolean
   autoSwitch?: boolean
   disableAutoExit?: boolean
-  autoSwitchThresholdLow?: number
-  autoSwitchThresholdHigh?: number
   autoSwitchCooldown?: number
 }>(), {
   assetBaseUrl: '',
@@ -354,9 +359,7 @@ const props = withDefaults(defineProps<{
   showRoute: false,
   autoSwitch: true,
   disableAutoExit: false,
-  autoSwitchThresholdLow: 1.45,
-  autoSwitchThresholdHigh: 3.8,
-  autoSwitchCooldown: 2000
+  autoSwitchCooldown: 1500
 })
 
 const emit = defineEmits<{
@@ -456,28 +459,14 @@ let desktopRotateModifiers = {
 }
 let cachedOverviewModel: THREE.Object3D | null = null
 let cachedSharedModelUrl = ''
-let autoSwitchOverviewMaxDim = 0
 
-// 自动切换状态：建筑外观积极进入，馆内锁定后再二段退出。
+// 自动切换状态：所有缩放输入统一使用相对距离状态机。
 let isAutoSwitchLocked = false
-let lastAutoSwitchTime = 0
-let lastControlDistance = 0
-let activeControlGestureStartedAt = 0
-let indoorEntryGestureLocked = false
-let indoorContextLockedUntil = 0
-let floorExitCandidateStartedAt = 0
-let floorExitCandidateBaseDistance = 0
-let floorExitZoomOutAccumulatedRatio = 0
 let autoSwitchTemporarilyDisabled = false
 let autoSwitchDisableTimer: ReturnType<typeof setTimeout> | null = null
-let overviewEntryIntentStartedAt = 0
 let modelAdjustReportTimer: ReturnType<typeof setTimeout> | null = null
 let hasPendingManualModelAdjustment = false
-let overviewEntryStartDistance = 0
-let overviewEntryZoomInRounds = 0
-let overviewWheelZoomInRounds = 0
-let overviewWheelZoomIntentUntil = 0
-let overviewWheelAutoSwitchTimer: ReturnType<typeof setTimeout> | null = null
+let activeAutoSwitchInputSource: GuideAutoSwitchInputSource = 'gesture'
 let isProgrammaticCameraChange = false
 let programmaticCameraTimer: ReturnType<typeof setTimeout> | null = null
 let cameraTween: CameraTweenState | null = null
@@ -495,21 +484,9 @@ const poiScreenHitRadiusPx = 64
 const poiScreenHitRadiusCorePx = 76
 const poiAmbientLabelHallSpacingPx = 92
 const poiAmbientLabelServiceSpacingPx = 72
-const indoorContextLockMs = 5000
-const indoorGestureExitGraceMs = 900
-const overviewEntryIntentWindowMs = 1200
-const overviewEntryMinZoomInRatio = 0.04
-const overviewEntryAccumulatedRatio = 0.2
-const overviewEntryMinRounds = 2
-const overviewEntryMaxRounds = 4
-const overviewWheelEntryDelayMs = 180
-const floorExitCandidateThresholdMultiplier = 1.12
-const floorExitConfirmThresholdMultiplier = 1.34
-const floorExitZoomOutIntentMinDeltaRatio = 0.015
-const floorExitAccumulatedZoomOutRatio = 0.26
-const floorExitCandidateHoldMs = 900
 const modelLoadRetryDelaysMs = [300, 900]
 const adjacentPreloadDelayMs = 900
+const manualAutoSwitchPauseMs = 1500
 const poiMarkerVisualLiftFactor = 0.92
 const poiAmbientLabelLiftFactor = 2.1
 const poiFocusLabelLiftFactor = 2.72
@@ -1593,7 +1570,10 @@ const cancelCameraTween = (options: { manual?: boolean } = {}) => {
     clearProgrammaticCameraTimer()
     const distance = controls?.getDistance()
     if (typeof distance === 'number' && Number.isFinite(distance)) {
-      lastControlDistance = distance
+      if (activeView.value === 'floor') {
+        // 用户中断楼层初始拟合时，使用中断后的稳定距离重新建立退出基准。
+        autoSwitchStateMachine.setFloorInitialDistance(distance)
+      }
     }
   }
 }
@@ -1610,11 +1590,6 @@ const moveCameraTo = (
   isProgrammaticCameraChange = true
   clearProgrammaticCameraTimer()
 
-  const nextDistance = toPosition.distanceTo(toTarget)
-  if (Number.isFinite(nextDistance)) {
-    lastControlDistance = nextDistance
-  }
-
   if (!cameraTweenEnabled || options.immediate) {
     cameraTween = null
     camera.position.copy(toPosition)
@@ -1689,7 +1664,10 @@ const updatePoiTapFeedback = (now: number) => {
 }
 
 const handleControlStart = () => {
-  activeControlGestureStartedAt = Date.now()
+  const distance = controls?.getDistance()
+  if (typeof distance === 'number' && Number.isFinite(distance)) {
+    autoSwitchStateMachine.beginInput(distance, activeAutoSwitchInputSource)
+  }
   if (!isProgrammaticCameraChange) {
     hasPendingManualModelAdjustment = true
     clearModelAdjustReportTimer()
@@ -1698,12 +1676,7 @@ const handleControlStart = () => {
 }
 
 const handleControlEnd = () => {
-  if (indoorEntryGestureLocked) {
-    indoorContextLockedUntil = Math.max(indoorContextLockedUntil, Date.now() + indoorGestureExitGraceMs)
-    indoorEntryGestureLocked = false
-  }
-  activeControlGestureStartedAt = 0
-  updateLastControlDistance()
+  activeAutoSwitchInputSource = 'gesture'
   scheduleModelAdjustIdleReport()
 }
 
@@ -2491,7 +2464,6 @@ const showFocusHallHighlight = (poi: RenderPoi) => {
 }
 
 const disposeCachedOverviewModel = () => {
-  autoSwitchOverviewMaxDim = 0
   if (!cachedOverviewModel) return
 
   disposeObject(cachedOverviewModel)
@@ -2885,15 +2857,6 @@ const getObjectSize = (object: THREE.Object3D) => (
   getObjectBox(object).getSize(new THREE.Vector3())
 )
 
-const getObjectMaxDim = (object: THREE.Object3D) => {
-  const size = getObjectSize(object)
-  return Math.max(size.x, size.y, size.z, 1)
-}
-
-const cacheAutoSwitchOverviewMaxDim = (model: THREE.Object3D) => {
-  autoSwitchOverviewMaxDim = getObjectMaxDim(model)
-}
-
 const getMultiFloorVerticalGap = (items: MultiFloorModelItem[]) => {
   const maxFloorHeight = Math.max(...items.map((item) => item.size.y), 1)
   const maxFootprint = Math.max(...items.map((item) => Math.max(item.size.x, item.size.z)), 1)
@@ -3096,229 +3059,58 @@ const disposeDetachedMultiFloorModels = (
     .forEach((item) => disposeObject(item.model, protectedResources))
 }
 
-const updateLastControlDistance = () => {
-  if (!controls) return
-
-  const distance = controls.getDistance()
-  if (Number.isFinite(distance)) {
-    lastControlDistance = distance
-  }
-}
-
-const resetOverviewEntryIntent = () => {
-  overviewEntryIntentStartedAt = 0
-  overviewEntryStartDistance = 0
-  overviewEntryZoomInRounds = 0
-  overviewWheelZoomInRounds = 0
-  overviewWheelZoomIntentUntil = 0
-}
-
-const resetFloorExitCandidate = () => {
-  floorExitCandidateStartedAt = 0
-  floorExitCandidateBaseDistance = 0
-  floorExitZoomOutAccumulatedRatio = 0
-}
-
-const markFloorAutoSwitchEntry = () => {
-  indoorContextLockedUntil = Date.now() + indoorContextLockMs
-  indoorEntryGestureLocked = activeControlGestureStartedAt > 0
-  resetOverviewEntryIntent()
-  resetFloorExitCandidate()
-  updateLastControlDistance()
-}
-
 const resetAutoSwitchDistanceTracking = () => {
-  activeControlGestureStartedAt = 0
-  indoorEntryGestureLocked = false
-  indoorContextLockedUntil = 0
-  resetOverviewEntryIntent()
-  resetFloorExitCandidate()
-  updateLastControlDistance()
+  activeAutoSwitchInputSource = 'gesture'
+  autoSwitchStateMachine.reset(activeView.value)
 }
 
-const clearOverviewWheelAutoSwitchTimer = () => {
-  if (overviewWheelAutoSwitchTimer) {
-    clearTimeout(overviewWheelAutoSwitchTimer)
-    overviewWheelAutoSwitchTimer = null
-  }
-}
-
-const hasOverviewWheelEntryRounds = () => (
-  activeView.value === 'overview'
-  && overviewWheelZoomInRounds >= overviewEntryMinRounds
-)
-
-const hasPendingOverviewWheelEntryIntent = (now: number) => (
-  hasOverviewWheelEntryRounds()
-  && isOverviewEntryIntentActive(now)
-)
-
-const canRunPendingOverviewEntry = (now: number) => (
-  props.autoSwitch
-  && !autoSwitchTemporarilyDisabled
-  && !isLoading.value
-  && !isAutoSwitchLocked
-  && now - lastAutoSwitchTime >= props.autoSwitchCooldown
-  && Boolean(controls && activeModel)
-)
-
 const handleWheelIntent = (event: WheelEvent) => {
-  if (!controls || activeView.value !== 'overview' || event.deltaY >= 0) return
+  if (!controls || activeView.value !== 'overview' || event.deltaY === 0) return
 
   const distance = controls.getDistance()
   if (!Number.isFinite(distance)) return
 
-  const now = Date.now()
-  if (!isOverviewEntryIntentActive(now)) {
-    overviewEntryIntentStartedAt = now
-    overviewEntryStartDistance = distance
-    overviewEntryZoomInRounds = 0
-    overviewWheelZoomInRounds = 0
-  }
-  overviewEntryIntentStartedAt = now
-  overviewEntryZoomInRounds += 1
-  overviewWheelZoomInRounds += 1
-  overviewWheelZoomIntentUntil = now + 900
-
-  clearOverviewWheelAutoSwitchTimer()
-  overviewWheelAutoSwitchTimer = setTimeout(() => {
-    const triggerNow = Date.now()
-    overviewWheelAutoSwitchTimer = null
-    if (hasPendingOverviewWheelEntryIntent(triggerNow) && canRunPendingOverviewEntry(triggerNow)) {
-      checkAutoSwitch({ forceOverviewEntry: true })
-    }
-  }, overviewWheelEntryDelayMs)
+  activeAutoSwitchInputSource = 'wheel'
+  autoSwitchStateMachine.beginInput(distance, 'wheel')
 }
 
-const isOverviewEntryIntentActive = (now: number) => (
-  overviewEntryIntentStartedAt > 0
-  && (
-    now - overviewEntryIntentStartedAt <= overviewEntryIntentWindowMs
-    || now <= overviewWheelZoomIntentUntil
-  )
-)
-
-const getOverviewEntryAccumulatedRatio = (distance: number) => {
-  if (!overviewEntryStartDistance || !Number.isFinite(distance)) return 0
-
-  return Math.max(0, 1 - distance / overviewEntryStartDistance)
-}
-
-const trackOverviewEntryIntent = (distance: number, previousDistance: number, now: number) => {
-  if (!Number.isFinite(distance) || !Number.isFinite(previousDistance) || previousDistance <= 0) return
-
-  const zoomInRatio = (previousDistance - distance) / previousDistance
-  const hasClearZoomIn = zoomInRatio >= overviewEntryMinZoomInRatio
-
-  if (!hasClearZoomIn) {
-    if (!isOverviewEntryIntentActive(now)) {
-      resetOverviewEntryIntent()
-    }
-    return
-  }
-
-  if (!isOverviewEntryIntentActive(now) || !overviewEntryStartDistance || distance > overviewEntryStartDistance) {
-    overviewEntryIntentStartedAt = now
-    overviewEntryStartDistance = previousDistance
-    overviewEntryZoomInRounds = 0
-  }
-
-  overviewEntryIntentStartedAt = now
-  overviewEntryZoomInRounds += 1
-
-  const accumulatedRatio = getOverviewEntryAccumulatedRatio(distance)
-  overviewEntryZoomInRounds = Math.max(
-    overviewEntryZoomInRounds,
-    Math.floor(accumulatedRatio / overviewEntryMinZoomInRatio)
-  )
-}
-
-const shouldEnterFloorFromOverview = (
-  distance: number,
-  maxDim: number,
-  now: number,
-  hasForcedOverviewEntryIntent = false
-) => {
-  const enterFloorAt = maxDim * props.autoSwitchThresholdLow
-  if (distance <= enterFloorAt) return true
-
-  if (hasForcedOverviewEntryIntent) return true
-  if (!isOverviewEntryIntentActive(now)) return false
-
-  const accumulatedRatio = getOverviewEntryAccumulatedRatio(distance)
-  const hasRepeatedZoomIn = overviewEntryZoomInRounds >= overviewEntryMinRounds
-    && accumulatedRatio >= overviewEntryAccumulatedRatio
-  const hasSustainedZoomIn = overviewEntryZoomInRounds >= overviewEntryMaxRounds
-    && accumulatedRatio >= overviewEntryAccumulatedRatio * 0.68
-
-  return hasRepeatedZoomIn || hasSustainedZoomIn
-}
-
-const isFloorAutoExitLocked = (now: number) => (
-  props.disableAutoExit
-  || Boolean(props.targetFocus)
-  || indoorEntryGestureLocked
-  || now < indoorContextLockedUntil
-)
-
-const checkAutoSwitch = (options: { forceOverviewEntry?: boolean } = {}) => {
-  const now = Date.now()
-  const hasForcedOverviewEntryIntent = options.forceOverviewEntry === true
-    && hasOverviewWheelEntryRounds()
-    && canRunPendingOverviewEntry(now)
-
+const canRunAutoSwitch = (direction: GuideAutoSwitchDirection) => {
   if (
     !props.autoSwitch
     || autoSwitchTemporarilyDisabled
     || isLoading.value
-    || (!hasForcedOverviewEntryIntent && isProgrammaticCameraChange)
+    || isAutoSwitchLocked
+    || isProgrammaticCameraChange
+    || !controls
+    || !activeModel
+    || activeView.value === 'multi'
   ) {
+    return false
+  }
+
+  if (direction === 'exit-overview') {
+    return !props.disableAutoExit && !props.targetFocus && activeView.value === 'floor'
+  }
+
+  return activeView.value === 'overview'
+}
+
+const requestAutoSwitch = (request: GuideAutoSwitchRequest) => {
+  if (!canRunAutoSwitch(request.direction)) {
+    autoSwitchStateMachine.markTransitionFailed()
     return
   }
 
-  if (isAutoSwitchLocked) {
-    emit('autoSwitchBlocked', { reason: 'loading-locked' })
-    return
-  }
-
-  if (now - lastAutoSwitchTime < props.autoSwitchCooldown) {
-    emit('autoSwitchBlocked', { reason: 'cooldown' })
-    return
-  }
-
-  if (!controls || !activeModel || activeView.value === 'multi') return
-
-  const distance = controls.getDistance()
-  const previousDistance = lastControlDistance || distance
-  const distanceDelta = distance - previousDistance
-  lastControlDistance = distance
-
-  // 自动切换使用全馆稳定尺寸，避免单楼层可见性过滤压低 floor -> overview 阈值。
-  const maxDim = autoSwitchOverviewMaxDim || getObjectMaxDim(activeModel)
-
-  if (activeView.value === 'overview') {
-    if (!hasForcedOverviewEntryIntent) {
-      trackOverviewEntryIntent(distance, previousDistance, now)
-    }
-
-    if (!shouldEnterFloorFromOverview(distance, maxDim, now, hasForcedOverviewEntryIntent)) {
-      return
-    }
-
+  isAutoSwitchLocked = true
+  if (request.direction === 'enter-floor') {
     const targetFloorId = getAutoEntryTargetFloorId()
     const hasSceneToKeep = hasRenderableSceneForFloorTransition()
-    isAutoSwitchLocked = true
-    lastAutoSwitchTime = now
-    resetFloorExitCandidate()
-    resetOverviewEntryIntent()
-    clearOverviewWheelAutoSwitchTimer()
-
     void runAutoSwitchLoad(
       {
         from: 'overview',
         to: 'floor',
         trigger: 'zoom-in',
-        distance
+        distance: request.distance
       },
       async () => {
         await loadFloor(targetFloorId, {
@@ -3332,65 +3124,33 @@ const checkAutoSwitch = (options: { forceOverviewEntry?: boolean } = {}) => {
     return
   }
 
-  if (activeView.value !== 'floor') {
-    resetFloorExitCandidate()
-    return
-  }
-
-  if (isFloorAutoExitLocked(now)) {
-    resetFloorExitCandidate()
-    return
-  }
-
-  const baseExitThreshold = maxDim * props.autoSwitchThresholdHigh
-  const candidateExitAt = baseExitThreshold * floorExitCandidateThresholdMultiplier
-  const confirmExitAt = baseExitThreshold * floorExitConfirmThresholdMultiplier
-  const isBeyondCandidateThreshold = distance >= candidateExitAt
-
-  if (!isBeyondCandidateThreshold) {
-    resetFloorExitCandidate()
-    return
-  }
-
-  if (!floorExitCandidateStartedAt) {
-    floorExitCandidateStartedAt = now
-    floorExitCandidateBaseDistance = Math.max(previousDistance, distance, 1)
-    floorExitZoomOutAccumulatedRatio = 0
-    return
-  }
-
-  const zoomOutRatio = previousDistance > 0 ? distanceDelta / previousDistance : 0
-  const isClearZoomOutIntent = zoomOutRatio >= floorExitZoomOutIntentMinDeltaRatio
-  if (isClearZoomOutIntent || distance > floorExitCandidateBaseDistance) {
-    floorExitZoomOutAccumulatedRatio = Math.max(
-      floorExitZoomOutAccumulatedRatio,
-      distance / Math.max(floorExitCandidateBaseDistance, 1) - 1
-    )
-  }
-
-  const hasConfirmedScale = distance >= confirmExitAt
-    && floorExitZoomOutAccumulatedRatio >= floorExitAccumulatedZoomOutRatio
-  const hasHeldCandidate = now - floorExitCandidateStartedAt >= floorExitCandidateHoldMs
-
-  if (!hasConfirmedScale || !hasHeldCandidate) {
-    return
-  }
-
-  isAutoSwitchLocked = true
-  lastAutoSwitchTime = now
-  resetFloorExitCandidate()
-
   void runAutoSwitchLoad(
     {
       from: 'floor',
       to: 'overview',
       trigger: 'zoom-out',
-      distance
+      distance: request.distance
     },
     loadOverview
   )
 }
 
+const autoSwitchStateMachine = new GuideAutoSwitchStateMachine({
+  cooldownMs: props.autoSwitchCooldown,
+  canSwitch: canRunAutoSwitch,
+  onSwitchRequested: requestAutoSwitch
+})
+
+const checkAutoSwitch = (source: GuideAutoSwitchInputSource = activeAutoSwitchInputSource) => {
+  if (!controls || isProgrammaticCameraChange) return
+
+  const distance = controls.getDistance()
+  if (!Number.isFinite(distance)) return
+
+  autoSwitchStateMachine.setView(activeView.value)
+  autoSwitchStateMachine.updateDistance(distance, { source })
+}
+
 const runAutoSwitchLoad = async (
   event: { from: 'overview' | 'floor'; to: 'overview' | 'floor'; trigger: 'zoom-in' | 'zoom-out'; distance: number },
   loadTask: () => Promise<unknown>,
@@ -3407,8 +3167,10 @@ const runAutoSwitchLoad = async (
     if (showLoading) {
       isLoading.value = false
     }
+    autoSwitchStateMachine.markTransitionSucceeded()
     emit('autoSwitch', event)
   } catch (error) {
+    autoSwitchStateMachine.markTransitionFailed()
     if (isStaleModelLoadError(error)) return
 
     console.error('馆内 3D 自动视角切换失败:', error)
@@ -3475,7 +3237,7 @@ const setCameraView = (
   }
   controls.minDistance = Math.max(SGS_VISUAL_RENDER_CONFIG.controls.minDistance, maxDim * 0.08)
   controls.maxDistance = Math.max(SGS_VISUAL_RENDER_CONFIG.controls.maxDistance, maxDim * 8)
-  moveCameraTo(nextPosition, nextTarget)
+  moveCameraTo(nextPosition, nextTarget, { onComplete: options.onComplete })
 }
 
 const fitCameraToObject = (object: THREE.Object3D, preset: CameraPreset = 'oblique') => {
@@ -3503,8 +3265,17 @@ const fitCameraToObject = (object: THREE.Object3D, preset: CameraPreset = 'obliq
         screenOffsetRatio: SGS_VISUAL_RENDER_CONFIG.framing.floorScreenOffsetRatio,
         up: new THREE.Vector3(0, 1, 0)
       }
-    : {}
+      : {}
 
+  overviewFitOptions.onComplete = () => {
+    if (activeView.value !== 'floor' || !controls) return
+
+    const distance = controls.getDistance()
+    if (Number.isFinite(distance)) {
+      // 楼层切换或相机复位完成后，以最终拟合距离作为退出基准。
+      autoSwitchStateMachine.setFloorInitialDistance(distance)
+    }
+  }
   setCameraView(center, maxDim, direction, overviewFitOptions)
 }
 
@@ -3523,11 +3294,6 @@ const applyOverviewInitialCamera = () => {
   camera.updateProjectionMatrix()
   controls.target.copy(OVERVIEW_INITIAL_CAMERA_PARAMS.target)
   controls.update()
-
-  const distance = camera.position.distanceTo(controls.target)
-  if (Number.isFinite(distance)) {
-    lastControlDistance = distance
-  }
 }
 
 const resetCamera = () => {
@@ -3555,33 +3321,16 @@ const zoomCamera = (direction: 'in' | 'out', options: { source?: ZoomCameraSourc
   if (!Number.isFinite(nextDistance) || nextDistance <= 0) return
 
   const shouldTrackUserZoom = options.source === 'button'
-
-  if (shouldTrackUserZoom && direction === 'in' && activeView.value === 'overview') {
-    const now = Date.now()
-    if (!isOverviewEntryIntentActive(now)) {
-      overviewEntryIntentStartedAt = now
-      overviewEntryStartDistance = currentDistance
-      overviewEntryZoomInRounds = 0
-    }
-    overviewEntryIntentStartedAt = now
-    overviewEntryZoomInRounds += 1
-    overviewWheelZoomInRounds += 1
-    overviewWheelZoomIntentUntil = now + 900
+  if (shouldTrackUserZoom) {
+    activeAutoSwitchInputSource = 'button'
+    autoSwitchStateMachine.beginInput(currentDistance, 'button')
   }
 
   offset.setLength(nextDistance)
   const nextPosition = controls.target.clone().add(offset)
   moveCameraTo(nextPosition, controls.target, {
-    onComplete: handleControlChange
+    onComplete: () => handleControlChange()
   })
-  if (shouldTrackUserZoom) {
-    lastControlDistance = currentDistance
-    checkAutoSwitch({
-      forceOverviewEntry: direction === 'in' && activeView.value === 'overview'
-    })
-  }
-
-  handleControlChange()
 }
 
 const loadCurrentFloorPoiMarkers = async (loadToken: number) => {
@@ -3635,6 +3384,7 @@ const loadOverview = async () => {
 
   const loadToken = startModelLoad()
   activeView.value = 'overview'
+  autoSwitchStateMachine.setView('overview')
   syncControlInteractionOptions()
   clearSceneData()
 
@@ -3647,7 +3397,6 @@ const loadOverview = async () => {
     activeModel.visible = true
     applyIndoorInitialModelTransform(activeModel)
     applyModelVisibilityForView(activeModel, 'overview')
-    cacheAutoSwitchOverviewMaxDim(activeModel)
     targetScene.add(activeModel)
     applyOverviewInitialCamera()
     loadCurrentFloorPoiMarkersInBackground(loadToken)
@@ -3677,7 +3426,6 @@ const loadOverview = async () => {
   prepareModel(activeModel)
   applyIndoorInitialModelTransform(activeModel)
   applyModelVisibilityForView(activeModel, 'overview')
-  cacheAutoSwitchOverviewMaxDim(activeModel)
   cachedOverviewModel = activeModel
   cachedSharedModelUrl = packageData.overviewModelUrl
   targetScene.add(activeModel)
@@ -3742,10 +3490,6 @@ const prepareFloorScene = async (
     applyIndoorInitialModelTransform(model)
     applyModelVisibilityForView(model, 'floor', requestedFloorId)
     cacheAsSharedModel = Boolean(floor.sharedModelAsset)
-
-    if (cacheAsSharedModel) {
-      cacheAutoSwitchOverviewMaxDim(model)
-    }
   }
 
   if (!model) {
@@ -3786,6 +3530,8 @@ const commitPreparedFloorScene = (
   }
 
   activeView.value = 'floor'
+  autoSwitchStateMachine.setView('floor')
+  autoSwitchStateMachine.clearFloorInitialDistance()
   syncControlInteractionOptions()
   currentFloor.value = expectedFloorId
   clearSceneData()
@@ -3812,7 +3558,6 @@ const commitPreparedFloorScene = (
   updatePoiMarkerFocus()
   hasLoadedFloorViewOnce = true
   fitCameraToObject(activeModel)
-  markFloorAutoSwitchEntry()
   refreshPoiVisibilityByDistance()
   renderRoutePreview()
   markFirstModelVisible('floor', {
@@ -3869,6 +3614,7 @@ const loadMultiFloor = async () => {
 
   const loadToken = startModelLoad()
   activeView.value = 'multi'
+  autoSwitchStateMachine.setView('multi')
   syncControlInteractionOptions()
   clearSceneData()
   setProgress(18, '正在加载多层展示模型...')
@@ -3897,7 +3643,6 @@ const loadMultiFloor = async () => {
       sourceModel.name = 'GuideOverviewModel'
       prepareModel(sourceModel)
       applyModelVisibilityForView(sourceModel, 'overview')
-      cacheAutoSwitchOverviewMaxDim(sourceModel)
       cachedOverviewModel = sourceModel
       cachedSharedModelUrl = sharedModelUrl
     }
@@ -4791,7 +4536,7 @@ const handleSceneTap = async (event: PointerEvent) => {
     if (hitMarker?.userData.poi) {
       const selectedPoi = hitMarker.userData.poi as RenderPoi
       if (activeView.value === 'overview') {
-        disableAutoSwitchTemporarily(10000)
+        disableAutoSwitchTemporarily(manualAutoSwitchPauseMs)
         try {
           await loadFloor(selectedPoi.floorId, {
             preserveCurrentSceneUntilReady: hasRenderableSceneForFloorTransition(),
@@ -4826,7 +4571,7 @@ const handleSceneTap = async (event: PointerEvent) => {
       .find((object): object is THREE.Object3D => Boolean(object))
 
     if (floorObject?.userData.floorId) {
-      disableAutoSwitchTemporarily(10000)
+      disableAutoSwitchTemporarily(manualAutoSwitchPauseMs)
       void handleFloorChange(floorObject.userData.floorId as string)
       return
     }
@@ -4841,6 +4586,12 @@ const handlePointerDown = (event: PointerEvent) => {
   if (event.pointerType === 'touch' && getActiveTouchPointerCount() >= 2) {
     hadMultiPointerGesture = true
     pointerDownState = null
+    activeAutoSwitchInputSource = 'touch'
+    const distance = controls?.getDistance()
+    if (typeof distance === 'number' && Number.isFinite(distance)) {
+      // 双指手势从第二个触点按下时重新记录连续缩放基准。
+      autoSwitchStateMachine.beginInput(distance, 'touch', { resetBaseline: true })
+    }
   }
   if (event.pointerType !== 'touch') {
     updateDesktopRotateModifierState(event)
@@ -5273,19 +5024,14 @@ const disposeScene = () => {
     autoSwitchDisableTimer = null
   }
 
-  clearOverviewWheelAutoSwitchTimer()
+  autoSwitchStateMachine.dispose()
   clearProgrammaticCameraTimer()
   clearModelAdjustReportTimer()
   hasPendingManualModelAdjustment = false
   cameraTween = null
   isProgrammaticCameraChange = false
-  lastControlDistance = 0
-  activeControlGestureStartedAt = 0
+  activeAutoSwitchInputSource = 'gesture'
   resetInteractionGateState()
-  indoorEntryGestureLocked = false
-  indoorContextLockedUntil = 0
-  resetOverviewEntryIntent()
-  resetFloorExitCandidate()
 
   clearSceneData()
   disposePoiMarkerCache()
diff --git a/src/components/map/guideAutoSwitchStateMachine.ts b/src/components/map/guideAutoSwitchStateMachine.ts
new file mode 100644
index 0000000..28217e2
--- /dev/null
+++ b/src/components/map/guideAutoSwitchStateMachine.ts
@@ -0,0 +1,251 @@
+export type GuideAutoSwitchView = 'overview' | 'floor' | 'multi'
+export type GuideAutoSwitchDirection = 'enter-floor' | 'exit-overview'
+export type GuideAutoSwitchInputSource = 'wheel' | 'button' | 'touch' | 'gesture'
+
+export interface GuideAutoSwitchRequest {
+  direction: GuideAutoSwitchDirection
+  distance: number
+  source: GuideAutoSwitchInputSource
+}
+
+interface GuideAutoSwitchStateMachineOptions {
+  onSwitchRequested: (request: GuideAutoSwitchRequest) => void
+  canSwitch?: (direction: GuideAutoSwitchDirection) => boolean
+  now?: () => number
+  enterRatio?: number
+  exitRatio?: number
+  holdMs?: number
+  cooldownMs?: number
+  intentTimeoutMs?: number
+}
+
+interface DistanceUpdateOptions {
+  previousDistance?: number
+  source?: GuideAutoSwitchInputSource
+}
+
+interface BeginInputOptions {
+  resetBaseline?: boolean
+}
+
+interface PendingCandidate {
+  direction: GuideAutoSwitchDirection
+  timer: ReturnType<typeof setTimeout>
+}
+
+const isValidDistance = (distance: number) => Number.isFinite(distance) && distance > 0
+
+export class GuideAutoSwitchStateMachine {
+  private readonly onSwitchRequested: (request: GuideAutoSwitchRequest) => void
+  private readonly canSwitch: (direction: GuideAutoSwitchDirection) => boolean
+  private readonly now: () => number
+  private readonly enterRatio: number
+  private readonly exitRatio: number
+  private readonly holdMs: number
+  private readonly cooldownMs: number
+  private readonly intentTimeoutMs: number
+
+  // 外观以连续缩放起点为基准，楼层以相机拟合完成后的距离为基准。
+  private view: GuideAutoSwitchView = 'overview'
+  private overviewStartDistance = 0
+  private overviewLastDistance = 0
+  private overviewLastInputAt: number | null = null
+  private floorInitialDistance = 0
+  private currentDistance = 0
+  private currentSource: GuideAutoSwitchInputSource = 'gesture'
+  private cooldownUntil = 0
+  private transitionPending = false
+  private candidate: PendingCandidate | null = null
+
+  constructor(options: GuideAutoSwitchStateMachineOptions) {
+    this.onSwitchRequested = options.onSwitchRequested
+    this.canSwitch = options.canSwitch || (() => true)
+    this.now = options.now || Date.now
+    this.enterRatio = options.enterRatio ?? 0.15
+    this.exitRatio = options.exitRatio ?? 0.2
+    this.holdMs = options.holdMs ?? 500
+    this.cooldownMs = options.cooldownMs ?? 1500
+    this.intentTimeoutMs = options.intentTimeoutMs ?? 1200
+  }
+
+  setView(view: GuideAutoSwitchView) {
+    if (this.view === view) return
+
+    this.cancelCandidate()
+    this.view = view
+    this.resetOverviewTracking()
+    if (view !== 'floor') {
+      this.floorInitialDistance = 0
+    }
+  }
+
+  beginInput(
+    distance: number,
+    source: GuideAutoSwitchInputSource,
+    options: BeginInputOptions = {}
+  ) {
+    if (this.view !== 'overview' || !isValidDistance(distance)) return
+
+    const now = this.now()
+    const intentExpired = this.hasOverviewIntentExpired(now)
+    const reversed = this.overviewLastDistance > 0 && distance > this.overviewLastDistance
+    if (
+      options.resetBaseline
+      || !this.overviewStartDistance
+      || intentExpired
+      || reversed
+    ) {
+      this.cancelCandidate('enter-floor')
+      this.overviewStartDistance = distance
+    }
+
+    this.overviewLastDistance = distance
+    this.overviewLastInputAt = now
+    this.currentDistance = distance
+    this.currentSource = source
+  }
+
+  updateDistance(distance: number, options: DistanceUpdateOptions = {}) {
+    if (!isValidDistance(distance) || this.view === 'multi') {
+      this.cancelCandidate()
+      return
+    }
+
+    const now = this.now()
+    const source = options.source || this.currentSource
+    this.currentDistance = distance
+    this.currentSource = source
+
+    if (this.view === 'overview') {
+      this.updateOverviewDistance(distance, now, options.previousDistance)
+      return
+    }
+
+    const shouldExit = this.floorInitialDistance > 0
+      && distance >= this.floorInitialDistance * (1 + this.exitRatio)
+    this.updateCandidate('exit-overview', shouldExit)
+  }
+
+  setFloorInitialDistance(distance: number) {
+    this.cancelCandidate('exit-overview')
+    this.floorInitialDistance = isValidDistance(distance) ? distance : 0
+    this.currentDistance = this.floorInitialDistance
+  }
+
+  clearFloorInitialDistance() {
+    this.cancelCandidate('exit-overview')
+    this.floorInitialDistance = 0
+  }
+
+  markTransitionSucceeded() {
+    this.transitionPending = false
+    this.cancelCandidate()
+    this.cooldownUntil = this.now() + this.cooldownMs
+    this.resetOverviewTracking()
+  }
+
+  markTransitionFailed() {
+    this.transitionPending = false
+    this.cancelCandidate()
+  }
+
+  reset(view: GuideAutoSwitchView = this.view) {
+    this.cancelCandidate()
+    this.view = view
+    this.transitionPending = false
+    this.cooldownUntil = 0
+    this.floorInitialDistance = 0
+    this.currentDistance = 0
+    this.resetOverviewTracking()
+  }
+
+  dispose() {
+    this.cancelCandidate()
+  }
+
+  private updateOverviewDistance(distance: number, now: number, previousDistance?: number) {
+    const fallbackStartDistance = typeof previousDistance === 'number' && isValidDistance(previousDistance)
+      ? previousDistance
+      : distance
+    const intentExpired = this.hasOverviewIntentExpired(now)
+    const reversed = this.overviewLastDistance > 0 && distance > this.overviewLastDistance
+
+    if (!this.overviewStartDistance || intentExpired || reversed) {
+      this.cancelCandidate('enter-floor')
+      this.overviewStartDistance = reversed ? distance : fallbackStartDistance
+    }
+
+    this.overviewLastDistance = distance
+    this.overviewLastInputAt = now
+
+    const shouldEnter = distance <= this.overviewStartDistance * (1 - this.enterRatio)
+    this.updateCandidate('enter-floor', shouldEnter)
+  }
+
+  private hasOverviewIntentExpired(now: number) {
+    return this.overviewLastInputAt !== null
+      && now - this.overviewLastInputAt > this.intentTimeoutMs
+  }
+
+  private updateCandidate(direction: GuideAutoSwitchDirection, conditionMet: boolean) {
+    if (!conditionMet) {
+      this.cancelCandidate(direction)
+      return
+    }
+
+    if (this.transitionPending || this.candidate?.direction === direction) return
+    if (!this.canSwitch(direction)) return
+
+    this.cancelCandidate()
+    // 条件必须保持 500ms；冷却尚未结束时主动等到更晚的确认时刻。
+    const delay = Math.max(this.holdMs, this.cooldownUntil - this.now())
+    const timer = setTimeout(() => {
+      this.confirmCandidate(direction)
+    }, Math.max(0, delay))
+    this.candidate = { direction, timer }
+  }
+
+  private confirmCandidate(direction: GuideAutoSwitchDirection) {
+    if (this.candidate?.direction !== direction) return
+    this.candidate = null
+
+    if (this.transitionPending || !this.isConditionMet(direction)) return
+    if (this.now() < this.cooldownUntil) {
+      this.updateCandidate(direction, true)
+      return
+    }
+    if (!this.canSwitch(direction)) return
+
+    this.transitionPending = true
+    this.onSwitchRequested({
+      direction,
+      distance: this.currentDistance,
+      source: this.currentSource
+    })
+  }
+
+  private isConditionMet(direction: GuideAutoSwitchDirection) {
+    if (direction === 'enter-floor') {
+      return this.view === 'overview'
+        && this.overviewStartDistance > 0
+        && this.currentDistance <= this.overviewStartDistance * (1 - this.enterRatio)
+    }
+
+    return this.view === 'floor'
+      && this.floorInitialDistance > 0
+      && this.currentDistance >= this.floorInitialDistance * (1 + this.exitRatio)
+  }
+
+  private cancelCandidate(direction?: GuideAutoSwitchDirection) {
+    if (!this.candidate || (direction && this.candidate.direction !== direction)) return
+
+    clearTimeout(this.candidate.timer)
+    this.candidate = null
+  }
+
+  private resetOverviewTracking() {
+    this.overviewStartDistance = 0
+    this.overviewLastDistance = 0
+    this.overviewLastInputAt = null
+  }
+}
diff --git a/src/components/navigation/GuideMapShell.vue b/src/components/navigation/GuideMapShell.vue
index 0ac1a3d..5b7e8fb 100644
--- a/src/components/navigation/GuideMapShell.vue
+++ b/src/components/navigation/GuideMapShell.vue
@@ -20,8 +20,6 @@
           :route-preview="routePreview"
           :show-route="showRoute"
           :disable-auto-exit="disableAutoExit"
-          :auto-switch-threshold-low="autoSwitchThresholdLow"
-          :auto-switch-threshold-high="autoSwitchThresholdHigh"
           @floor-change="handleThreeFloorChange"
           @poi-click="handlePoiClick"
           @selection-clear="handleSelectionClear"
@@ -358,8 +356,6 @@ const props = withDefaults(defineProps<{
   routePreview?: GuideRouteResult | null
   showRoute?: boolean
   disableAutoExit?: boolean
-  autoSwitchThresholdLow?: number
-  autoSwitchThresholdHigh?: number
   outdoorNavPolylines?: OutdoorNavPolyline[]
   outdoorMarkers?: OutdoorMapMarker[]
   activeOutdoorMarkerId?: string
@@ -411,8 +407,6 @@ const props = withDefaults(defineProps<{
   routePreview: null,
   showRoute: false,
   disableAutoExit: false,
-  autoSwitchThresholdLow: 1.0,
-  autoSwitchThresholdHigh: 1.3,
   outdoorNavPolylines: () => [] as OutdoorNavPolyline[],
   outdoorMarkers: () => [] as OutdoorMapMarker[],
   activeOutdoorMarkerId: '',
@@ -440,10 +434,13 @@ const emit = defineEmits<{
   outdoorMarkerClick: [markerId: string]
 }>()
 
+// 手动切换与自动切换共用 1500ms 保护，避免操作完成后立即反向跳转。
+const manualAutoSwitchPauseMs = 1500
+
 // 监听视角切换，循环切换：reset -> top -> oblique -> reset
 watch(() => props.cameraView, (view) => {
   if (props.mapType !== 'indoor') return
-  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(10000)
+  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(manualAutoSwitchPauseMs)
 
   if (view === 'reset') {
     indoorRendererRef.value?.resetCamera?.()
@@ -595,7 +592,7 @@ const handleFloorChange = (floor: { id: string; label: string }) => {
   const requestSeq = ++floorSwitchRequestSeq
   activeFloorSwitchRequestSeq.value = requestSeq
   failedFloorId.value = ''
-  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(10000)
+  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(manualAutoSwitchPauseMs)
   emit('floorRequest', {
     floorId,
     floorLabel: floor.label
@@ -620,8 +617,8 @@ const handleFloorChange = (floor: { id: string; label: string }) => {
 }
 
 const handleLayerModeChange = (mode: LayerDisplayMode) => {
-  // 手动切换展示层数时临时禁用缩放自动切换 10 秒
-  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(10000)
+  // 手动切换展示层数时使用统一的短保护期。
+  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(manualAutoSwitchPauseMs)
 
   if (mode === 'multi') {
     loadingFloorId.value = ''
@@ -679,7 +676,7 @@ const handleFloorHeaderTap = () => {
 
 const handleToolClick = (tool: string) => {
   if (props.mapType === 'indoor') {
-    indoorRendererRef.value?.disableAutoSwitchTemporarily?.(10000)
+    indoorRendererRef.value?.disableAutoSwitchTemporarily?.(manualAutoSwitchPauseMs)
 
     if (tool === '复位') {
       indoorRendererRef.value?.resetCamera?.()
@@ -709,7 +706,7 @@ const handleZoomClick = (direction: 'in' | 'out') => {
 }
 
 const handleShowOverview = async () => {
-  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(10000)
+  indoorRendererRef.value?.disableAutoSwitchTemporarily?.(manualAutoSwitchPauseMs)
   loadingFloorId.value = ''
   requestedFloorId.value = ''
   requestedFloorLabel.value = ''
diff --git a/src/pages/index/index.vue b/src/pages/index/index.vue
index 50a639e..3e18a2e 100644
--- a/src/pages/index/index.vue
+++ b/src/pages/index/index.vue
@@ -45,8 +45,6 @@
       :active-outdoor-marker-id="activeArrivalMarkerId"
       :outdoor-focus-offset-y="arrivalOutdoorFocusOffsetY"
       :disable-auto-exit="disableIndoorAutoExit"
-      :auto-switch-threshold-low="0.58"
-      :auto-switch-threshold-high="1.18"
       @mode-change="handleModeChange"
       @floor-request="handleFloorRequest"
       @floor-change="handleFloorChange"
diff --git a/tests/unit/GuideAutoSwitchStateMachine.spec.ts b/tests/unit/GuideAutoSwitchStateMachine.spec.ts
new file mode 100644
index 0000000..ef5b81b
--- /dev/null
+++ b/tests/unit/GuideAutoSwitchStateMachine.spec.ts
@@ -0,0 +1,147 @@
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest'
+import {
+  GuideAutoSwitchStateMachine,
+  type GuideAutoSwitchDirection,
+  type GuideAutoSwitchInputSource
+} from '@/components/map/guideAutoSwitchStateMachine'
+
+const createMachine = () => {
+  const requests: GuideAutoSwitchDirection[] = []
+  const machine = new GuideAutoSwitchStateMachine({
+    onSwitchRequested: ({ direction }) => requests.push(direction)
+  })
+
+  return { machine, requests }
+}
+
+beforeEach(() => {
+  vi.useFakeTimers()
+  vi.setSystemTime(0)
+})
+
+afterEach(() => {
+  vi.useRealTimers()
+})
+
+describe('建筑外观与馆内楼层自动切换状态机', () => {
+  it('连续放大 14.9% 不进入，达到 15% 并保持 500ms 后进入', () => {
+    const { machine, requests } = createMachine()
+
+    machine.beginInput(100, 'gesture')
+    machine.updateDistance(85.1, { source: 'gesture' })
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual([])
+
+    machine.updateDistance(85, { source: 'gesture' })
+    vi.advanceTimersByTime(499)
+    expect(requests).toEqual([])
+    vi.advanceTimersByTime(1)
+    expect(requests).toEqual(['enter-floor'])
+  })
+
+  it('两次滚轮事件累计不足 15% 时不进入', () => {
+    const { machine, requests } = createMachine()
+
+    machine.beginInput(100, 'wheel')
+    machine.updateDistance(95, { source: 'wheel' })
+    machine.beginInput(95, 'wheel')
+    machine.updateDistance(90, { source: 'wheel' })
+    vi.advanceTimersByTime(500)
+
+    expect(requests).toEqual([])
+  })
+
+  it('相对楼层初始距离拉远 19.9% 不退出，达到 20% 并保持 500ms 后退出', () => {
+    const { machine, requests } = createMachine()
+
+    machine.setView('floor')
+    machine.setFloorInitialDistance(100)
+    machine.updateDistance(119.9)
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual([])
+
+    machine.updateDistance(120)
+    vi.advanceTimersByTime(499)
+    expect(requests).toEqual([])
+    vi.advanceTimersByTime(1)
+    expect(requests).toEqual(['exit-overview'])
+  })
+
+  it('条件满足后反向缩放会取消防抖任务并重置进入基准', () => {
+    const { machine, requests } = createMachine()
+
+    machine.beginInput(100, 'touch', { resetBaseline: true })
+    machine.updateDistance(85, { source: 'touch' })
+    vi.advanceTimersByTime(300)
+    machine.updateDistance(88, { source: 'touch' })
+    vi.advanceTimersByTime(500)
+
+    expect(requests).toEqual([])
+
+    machine.updateDistance(74.8, { source: 'touch' })
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual(['enter-floor'])
+  })
+
+  it('退出条件满足后回到 20% 阈值内会取消防抖任务', () => {
+    const { machine, requests } = createMachine()
+
+    machine.setView('floor')
+    machine.setFloorInitialDistance(100)
+    machine.updateDistance(120)
+    vi.advanceTimersByTime(300)
+    machine.updateDistance(119.9)
+    vi.advanceTimersByTime(500)
+
+    expect(requests).toEqual([])
+  })
+
+  it('进入意图超时后使用新的连续缩放距离重新计算基准', () => {
+    const { machine, requests } = createMachine()
+
+    machine.beginInput(100, 'wheel')
+    machine.updateDistance(90, { source: 'wheel' })
+    vi.advanceTimersByTime(1201)
+    machine.updateDistance(80, { previousDistance: 90, source: 'wheel' })
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual([])
+
+    machine.updateDistance(76.5, { source: 'wheel' })
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual(['enter-floor'])
+  })
+
+  it('切换成功后 1499ms 内不能反向切换，1500ms 后可以', () => {
+    const { machine, requests } = createMachine()
+
+    machine.beginInput(100, 'wheel')
+    machine.updateDistance(85, { source: 'wheel' })
+    vi.advanceTimersByTime(500)
+    expect(requests).toEqual(['enter-floor'])
+
+    machine.markTransitionSucceeded()
+    machine.setView('floor')
+    machine.setFloorInitialDistance(100)
+    machine.updateDistance(120)
+    vi.advanceTimersByTime(1499)
+    expect(requests).toEqual(['enter-floor'])
+    vi.advanceTimersByTime(1)
+    expect(requests).toEqual(['enter-floor', 'exit-overview'])
+  })
+
+  it.each<GuideAutoSwitchInputSource>(['wheel', 'button', 'touch'])(
+    '%s 路径使用同一套 15% 进入判断',
+    (source) => {
+      const { machine, requests } = createMachine()
+
+      machine.beginInput(100, source, { resetBaseline: source === 'touch' })
+      machine.updateDistance(85.1, { source })
+      vi.advanceTimersByTime(500)
+      expect(requests).toEqual([])
+
+      machine.updateDistance(85, { source })
+      vi.advanceTimersByTime(500)
+      expect(requests).toEqual(['enter-floor'])
+    }
+  )
+})