diff --git a/src/CounterDrone.Core/Algorithms/DefensePlanner.cs b/src/CounterDrone.Core/Algorithms/DefensePlanner.cs
index 965fd8b..af6f275 100644
--- a/src/CounterDrone.Core/Algorithms/DefensePlanner.cs
+++ b/src/CounterDrone.Core/Algorithms/DefensePlanner.cs
@@ -402,6 +402,12 @@ namespace CounterDrone.Core.Algorithms
             if (deliveryTime > interceptTime) return null;
             if (!HasInterceptWindow(threat, midArc, expansionTime, deliveryTime)) return null;
 
+            var (icArc, _, _) = InterceptCalculator.ComputeHorizontal(
+                threat.Waypoints, threat.DetectArc, GetDroneSpeedKph(threat),
+                _config.ReactionTime + expansionTime, unit.Position, unit.CruiseSpeed,
+                unit.ReleaseAltitude, (float)threat.Target.TypicalAltitude);
+            if (icArc <= 0) return null;
+
             float avgSpeed = GetDroneSpeedMs(threat);
             float neededExposure = _damageModel.RequiredExposureSeconds((TargetType)threat.Target.TargetType, (PowerType)threat.Target.PowerType, ammoType);
             float actualExposure = effectiveR * 2f / avgSpeed;
@@ -495,12 +501,17 @@ namespace CounterDrone.Core.Algorithms
                 var (ia, _, la) = InterceptCalculator.Compute(
                     wps, threat.DetectArc, typicalSpeed,
                     _config.ReactionTime + expansionTime, unit.Position, unit.MuzzleVelocity);
-                crossArc = ia > 0 ? ia : midArc + targetOffset;
+                crossArc = (ia > 0 ? ia : midArc) + targetOffset;
                 launchAngle = la;
             }
             else
             {
-                crossArc = midArc + targetOffset;
+                var (ia, _, la) = InterceptCalculator.ComputeHorizontal(
+                    wps, threat.DetectArc, typicalSpeed,
+                    _config.ReactionTime + expansionTime, unit.Position, unit.CruiseSpeed,
+                    unit.ReleaseAltitude, (float)threat.Target.TypicalAltitude);
+                crossArc = (ia > 0 ? ia : midArc) + targetOffset;
+                launchAngle = la;
             }
 
             // 编队横向偏移：按车道分布在航路法向上，与 DroneEntity 编队偏移一致（起点展开）。
diff --git a/test/unit/CounterDrone.Core.Tests/FullPipelineTests.cs b/test/unit/CounterDrone.Core.Tests/FullPipelineTests.cs
index 31cba87..45be707 100644
--- a/test/unit/CounterDrone.Core.Tests/FullPipelineTests.cs
+++ b/test/unit/CounterDrone.Core.Tests/FullPipelineTests.cs
@@ -152,8 +152,9 @@ namespace CounterDrone.Core.Tests
             Assert.All(eng.Events.Where(e => e.Type == SimEventType.MunitionLaunched),
                 e => Assert.Contains("空基", e.Description));
             var drone = eng.Drones[0];
-            Assert.True(eng.Events.Count(e => e.Type == SimEventType.MunitionLaunched) > 0);
-            Assert.True(drone.Hp < 0.1f);
+            var detail = _scenario.GetTaskDetail(_taskId)!;
+            var report = new ReportGenerator().Generate(detail, eng.Events.ToList(), drone.Status, eng.SimulationTime);
+            Assert.True(drone.Hp < 0.1f, $"Hp={drone.Hp:F3} pos=({drone.PosX:F0},{drone.PosY:F0}) launched={eng.Events.Count(e => e.Type == SimEventType.MunitionLaunched)}\n{report}");
             VerifyAndExportReport(eng, drone);
         }