diff --git a/src/UI/WPF/ViewModels/AnimationControlViewModel.cs b/src/UI/WPF/ViewModels/AnimationControlViewModel.cs
index 1ce96dc..7048ef8 100644
--- a/src/UI/WPF/ViewModels/AnimationControlViewModel.cs
+++ b/src/UI/WPF/ViewModels/AnimationControlViewModel.cs
@@ -2229,10 +2229,10 @@ namespace NavisworksTransport.UI.WPF.ViewModels
                 return ObjectPassageProjectionOptimizationResult.CreateFailure("动画物体为空，无法自动调整。");
             }
 
-            if (!TryCreatePassageProjectionAxes(request, out Vector3 hostSide, out Vector3 hostUp))
-            {
-                return ObjectPassageProjectionOptimizationResult.CreateFailure("路径方向退化，无法计算通行截面。");
-            }
+            // 固定评估坐标系：前向=宿主X轴，截面=YZ平面
+            CoordinateSystemType hst = CoordinateSystemManager.Instance.ResolvedType;
+            var hostUp = hst == CoordinateSystemType.YUp ? Vector3.UnitY : Vector3.UnitZ;
+            var hostSide = Vector3.Cross(Vector3.UnitX, hostUp);
 
             var originalCorrection = _objectRotationCorrection;
             double originalLiftInMeters = _objectGroundLiftHeightInMeters;
@@ -2244,37 +2244,18 @@ namespace NavisworksTransport.UI.WPF.ViewModels
                     request,
                     correction =>
                     {
-                        // 从 correction 扣除路径 yaw（动画链路会在起点再次加上）
-                        // 这样 targetYaw = pathYaw + (correctionY - pathYaw) = correctionY
-                        CoordinateSystemType hst = CoordinateSystemManager.Instance.ResolvedType;
-                        double pyAdj = 0;
-                        if (PathTargetFrameResolver.TryResolvePlanarHostYaw(request.HostPathForward, hst, out double pyRad))
-                        {
-                            pyAdj = pyRad * 180.0 / Math.PI;
-                        }
-                        var corr = correction;
-                        var baseAdjusted = new LocalEulerRotationCorrection(
-                            corr.XDegrees,
-                            hst == CoordinateSystemType.YUp ? corr.YDegrees - pyAdj : corr.YDegrees,
-                            hst == CoordinateSystemType.ZUp ? corr.ZDegrees - pyAdj : corr.ZDegrees);
                         var placementRequest = ObjectStartPlacementRequest.CreateRotationCorrection(
-                            baseAdjusted,
+                            correction,
                             originalLiftInMeters);
                         _pathAnimationManager.ApplyObjectStartPlacementRequest(placementRequest);
                         BoundingBox3D bounds = animatedObject.BoundingBox();
-                        var baseScore = CalculateMeasuredAabbProjectionScore(bounds, hostSide, hostUp);
-                        var score = new ObjectPassageProjectionScore(
-                            baseScore.WidthAcrossPath,
-                            baseScore.HeightAlongHostUp + request.VehicleHeightModelUnits);
+                        var score = CalculateMeasuredAabbProjectionScore(bounds, hostSide, hostUp);
 
-                        // 按门型约束过滤：宽门要求 Width >= Height，高门要求 Height >= Width
                         bool meetsConstraint = request.RequireWidthLarger
                             ? score.WidthAcrossPath >= score.HeightAlongHostUp
                             : score.HeightAlongHostUp >= score.WidthAcrossPath;
                         if (!meetsConstraint)
-                        {
                             return ObjectPassageProjectionScore.Invalid;
-                        }
 
                         return score;
                     });
@@ -2282,17 +2263,7 @@ namespace NavisworksTransport.UI.WPF.ViewModels
             // 计算上下偏移：应用最优旋转后，使物体底面贴合物流车高度
             if (result.Success && CurrentPathRoute?.PathType == PathType.Ground)
             {
-                CoordinateSystemType hst = CoordinateSystemManager.Instance.ResolvedType;
-                double pyAdj = 0;
-                if (PathTargetFrameResolver.TryResolvePlanarHostYaw(request.HostPathForward, hst, out double pyRad))
-                {
-                    pyAdj = pyRad * 180.0 / Math.PI;
-                }
-                var optimalBaseAdjusted = new LocalEulerRotationCorrection(
-                    result.Correction.XDegrees,
-                    hst == CoordinateSystemType.YUp ? result.Correction.YDegrees - pyAdj : result.Correction.YDegrees,
-                    hst == CoordinateSystemType.ZUp ? result.Correction.ZDegrees - pyAdj : result.Correction.ZDegrees);
-                var measureRequest = ObjectStartPlacementRequest.CreateRotationCorrection(optimalBaseAdjusted, 0);
+                var measureRequest = ObjectStartPlacementRequest.CreateRotationCorrection(result.Correction, 0);
                 _pathAnimationManager.ApplyObjectStartPlacementRequest(measureRequest);
                 BoundingBox3D measureBounds = animatedObject.BoundingBox();
 
diff --git a/src/UI/WPF/Views/EditRotationWindow.xaml b/src/UI/WPF/Views/EditRotationWindow.xaml
index 283d710..e600534 100644
--- a/src/UI/WPF/Views/EditRotationWindow.xaml
+++ b/src/UI/WPF/Views/EditRotationWindow.xaml
@@ -150,7 +150,7 @@
                 <CheckBox x:Name="WidthLargerCheckBox"
                           IsChecked="{Binding RequireWidthLarger}"
                           Content="宽 > 高（否则高 > 宽）"
-                          ToolTip="根据物流通道的门型选择：默认宽扁门，物体放平穿过；取消则为高窄门，物体立起穿过。"
+                          ToolTip="根据物流通道门型选择"
                           FontSize="10"
                           Foreground="#FF666666"
                           Margin="0,0,0,8"/>
diff --git a/src/UI/WPF/Views/EditRotationWindow.xaml.cs b/src/UI/WPF/Views/EditRotationWindow.xaml.cs
index 88071cc..86ad684 100644
--- a/src/UI/WPF/Views/EditRotationWindow.xaml.cs
+++ b/src/UI/WPF/Views/EditRotationWindow.xaml.cs
@@ -28,8 +28,8 @@ namespace NavisworksTransport.UI.WPF.Views
         private readonly ObjectPassageProjectionOptimizationRequest _autoAdjustmentRequest;
         private readonly Func<ObjectPassageProjectionOptimizationResult> _autoAdjustmentProvider;
         private readonly bool _isGroundLiftEnabled;
-        private bool _requireWidthLarger = false;
         private double _vehicleHeightInMeters = 0.15;
+        private bool _requireWidthLarger = false;
 
         /// <summary>
         /// 门型偏好：true=宽>高，false=高>宽（默认）
@@ -40,9 +40,6 @@ namespace NavisworksTransport.UI.WPF.Views
             set => _requireWidthLarger = value;
         }
 
-        /// <summary>
-        /// 物流车辆高度（米），默认 0.15m
-        /// </summary>
         public double VehicleHeightInMeters
         {
             get => _vehicleHeightInMeters;
@@ -177,8 +174,10 @@ namespace NavisworksTransport.UI.WPF.Views
                 return;
             }
 
+            PathTargetFrameResolver.TryResolvePlanarHostYaw(_autoAdjustmentRequest.HostPathForward, CoordinateSystemManager.Instance.ResolvedType, out double yawRad);
+
             RotationXDegrees = NormalizeDisplayDegrees(result.Correction.XDegrees);
-            RotationYDegrees = NormalizeDisplayDegrees(result.Correction.YDegrees);
+            RotationYDegrees = NormalizeDisplayDegrees(result.Correction.YDegrees + yawRad * 180.0 / Math.PI);
             RotationZDegrees = NormalizeDisplayDegrees(result.Correction.ZDegrees);
             if (result.ComputedLiftOffsetMeters.HasValue)
             {
diff --git a/src/Utils/CoordinateSystem/ObjectPassageProjectionOptimizer.cs b/src/Utils/CoordinateSystem/ObjectPassageProjectionOptimizer.cs
index a47c7fb..42d9491 100644
--- a/src/Utils/CoordinateSystem/ObjectPassageProjectionOptimizer.cs
+++ b/src/Utils/CoordinateSystem/ObjectPassageProjectionOptimizer.cs
@@ -13,8 +13,7 @@ namespace NavisworksTransport.Utils.CoordinateSystem
             Vector3 hostPathForward,
             Vector3 hostUp,
             double areaRelativeTieTolerance = 0.01,
-            Quaternion? baselineHostRotation = null,
-            bool requireWidthLarger = true)
+            Quaternion? baselineHostRotation = null)
         {
             SizeX = sizeX;
             SizeY = sizeY;
@@ -23,7 +22,6 @@ namespace NavisworksTransport.Utils.CoordinateSystem
             HostUp = hostUp;
             AreaRelativeTieTolerance = areaRelativeTieTolerance;
             BaselineHostRotation = Quaternion.Normalize(baselineHostRotation ?? Quaternion.Identity);
-            RequireWidthLarger = requireWidthLarger;
         }
 
         public double SizeX { get; }
@@ -41,12 +39,12 @@ namespace NavisworksTransport.Utils.CoordinateSystem
         public Quaternion BaselineHostRotation { get; }
 
         /// <summary>
-        /// 是否要求通行截面宽度 >= 高度（宽扁门）。false 表示高窄门（高度 >= 宽度）。
+        /// 门型偏好：true=宽>高，false=高>宽
         /// </summary>
         public bool RequireWidthLarger { get; set; }
 
         /// <summary>
-        /// 物体下方物流车辆高度（模型单位），自动调整时加到通行截面高度上。
+        /// 物体下方物流车辆高度（模型单位）
         /// </summary>
         public double VehicleHeightModelUnits { get; set; }
     }