diff --git a/Assets/Scripts/Interaction/PingClickHandler.cs b/Assets/Scripts/Interaction/PingClickHandler.cs
index 7c043df..b59b58e 100644
--- a/Assets/Scripts/Interaction/PingClickHandler.cs
+++ b/Assets/Scripts/Interaction/PingClickHandler.cs
@@ -8,6 +8,9 @@ public class PingClickHandler : MonoBehaviour
     private bool _modelShown;
     private bool _isBlinking;
     
+    // 静态变量，记录上一帧被点击的帧号，防止同一帧内多个 Ping 发生连锁反应
+    private static int _lastClickedFrame = -1;
+    
     public bool CanBeClicked() { return _isBlinking; }
 
     void OnEnable()
@@ -19,24 +22,25 @@ public class PingClickHandler : MonoBehaviour
         var colliders = GetComponents<Collider>();
         foreach (var c in colliders)
         {
-            if (c is SphereCollider || c is CapsuleCollider)
+            if (c is BoxCollider || c is CapsuleCollider)
             {
                 Destroy(c);
             }
         }
 
-        var box = GetComponent<BoxCollider>();
-        if (box == null) box = gameObject.AddComponent<BoxCollider>();
+        var sphere = GetComponent<SphereCollider>();
+        if (sphere == null) sphere = gameObject.AddComponent<SphereCollider>();
         
-        Vector3 lossy = transform.lossyScale;
-        float sx = Mathf.Clamp(0.5f / Mathf.Max(Mathf.Abs(lossy.x), 0.001f), 0.001f, 100f);
-        float sy = Mathf.Clamp(0.5f / Mathf.Max(Mathf.Abs(lossy.y), 0.001f), 0.001f, 100f);
-        float sz = Mathf.Clamp(0.5f / Mathf.Max(Mathf.Abs(lossy.z), 0.001f), 0.001f, 100f);
+        // 核心修复：真实世界半径设定
+        // 我们希望在 3D 世界里，这个点击热区的半径大约是 0.15 米（不大不小正好点击）
+        // 因为你的模型 lossyScale 达到了 100，所以局部 radius 必须除以 100 = 0.0015
+        float maxScale = Mathf.Max(Mathf.Abs(transform.lossyScale.x), Mathf.Abs(transform.lossyScale.y), Mathf.Abs(transform.lossyScale.z));
+        if (maxScale < 0.001f) maxScale = 1f;
         
-        box.size = new Vector3(sx, sy, sz);
-        box.center = Vector3.zero;
-        box.isTrigger = false;
-        box.enabled = true;
+        sphere.radius = 0.2f / maxScale; // 绝对保证世界半径是 0.2 米！不互相干涉
+        sphere.center = Vector3.zero;
+        sphere.isTrigger = false;
+        sphere.enabled = true;
 
         CreateOutlineMesh();
         _modelShown = false;
@@ -72,34 +76,27 @@ public class PingClickHandler : MonoBehaviour
         while (true) { if (_outlineMesh != null) _outlineMesh.enabled = !_outlineMesh.enabled; yield return new WaitForSeconds(0.4f); }
     }
 
-    void OnMouseDown()
-    {
-        Debug.Log($"[PingClick] OnMouseDown 触发: {name}");
-        PerformClick();
-    }
-
     void Update()
     {
         if (Input.GetMouseButtonDown(0))
         {
             if (!_isBlinking) return;
             
+            // 解决 "一键点出多个" 的 BUG：同一帧内只能有一个物体被点中！
+            if (Time.frameCount == _lastClickedFrame) return;
+
             foreach (var c in Camera.allCameras)
             {
                 if (!c.enabled) continue;
                 
                 Ray ray = c.ScreenPointToRay(Input.mousePosition);
-                // 使用超长射线，无视距离
-                RaycastHit[] hits = Physics.RaycastAll(ray, 10000f);
+                RaycastHit[] hits = Physics.RaycastAll(ray, 1000f);
                 foreach (var hit in hits)
                 {
                     if (hit.collider != null && hit.collider.gameObject == gameObject)
                     {
                         Debug.Log($"[PingClick] Update手动射线贯穿点中 (使用相机: {c.name}): {name}");
-                        
-                        // FIX BUG: Prevent multiple clicks in the same frame
-                        _isBlinking = false;
-                        
+                        _lastClickedFrame = Time.frameCount; // 锁定这一帧，别的 ping 不准再触发
                         PerformClick();
                         return;
                     }