diff --git a/Assets/Scripts/Interaction/PingClickHandler.cs b/Assets/Scripts/Interaction/PingClickHandler.cs
index 9c1eb32..cd1545e 100644
--- a/Assets/Scripts/Interaction/PingClickHandler.cs
+++ b/Assets/Scripts/Interaction/PingClickHandler.cs
@@ -41,27 +41,32 @@ public class PingClickHandler : MonoBehaviour
         if (_outlineRenderer != null) return;
         var ringGo = new GameObject("BlueRing");
         ringGo.transform.SetParent(transform, false);
-        ringGo.transform.localPosition = new Vector3(0, 0.05f, 0);
 
         _outlineRenderer = ringGo.AddComponent<LineRenderer>();
         _outlineRenderer.useWorldSpace = true;
         _outlineRenderer.loop = true;
-        _outlineRenderer.startWidth = 0.05f;
-        _outlineRenderer.endWidth = 0.05f;
+        _outlineRenderer.startWidth = 0.04f;
+        _outlineRenderer.endWidth = 0.04f;
         _outlineRenderer.material = new Material(Shader.Find("Unlit/Color"));
         _outlineRenderer.material.color = new Color(0.2f, 0.5f, 1f);
         _outlineRenderer.startColor = new Color(0.2f, 0.5f, 1f);
         _outlineRenderer.endColor = new Color(0.2f, 0.5f, 1f);
 
-        float r = 0.25f;
-        int segs = 32;
-        _outlineRenderer.positionCount = segs;
-        Vector3 center = transform.position + Vector3.up * 0.1f;
-        for (int i = 0; i < segs; i++)
-        {
-            float a = i * 2f * Mathf.PI / segs;
-            _outlineRenderer.SetPosition(i, center + new Vector3(Mathf.Cos(a) * r, 0, Mathf.Sin(a) * r));
-        }
+        // 基于模型 Bounds 画矩形描边
+        Bounds b;
+        if (_meshRenderer != null) b = _meshRenderer.bounds;
+        else b = new Bounds(transform.position, new Vector3(0.3f, 0.01f, 0.3f));
+        float y = b.center.y + 0.05f;
+        Vector3 p0 = new Vector3(b.min.x, y, b.min.z);
+        Vector3 p1 = new Vector3(b.min.x, y, b.max.z);
+        Vector3 p2 = new Vector3(b.max.x, y, b.max.z);
+        Vector3 p3 = new Vector3(b.max.x, y, b.min.z);
+        _outlineRenderer.positionCount = 5;
+        _outlineRenderer.SetPosition(0, p0);
+        _outlineRenderer.SetPosition(1, p1);
+        _outlineRenderer.SetPosition(2, p2);
+        _outlineRenderer.SetPosition(3, p3);
+        _outlineRenderer.SetPosition(4, p0);
     }
 
     System.Collections.IEnumerator BlinkOutline()
diff --git a/Assets/Scripts/Interaction/TouchPositionHandler.cs b/Assets/Scripts/Interaction/TouchPositionHandler.cs
index 2ce938c..9183d21 100644
--- a/Assets/Scripts/Interaction/TouchPositionHandler.cs
+++ b/Assets/Scripts/Interaction/TouchPositionHandler.cs
@@ -22,7 +22,18 @@ public class TouchPositionHandler : MonoBehaviour
     private void OnEnable()
     {
         _meshRenderer = GetComponent<MeshRenderer>();
-        if (_meshRenderer != null) _meshRenderer.enabled = true;
+        if (_meshRenderer != null)
+        {
+            _meshRenderer.enabled = true;
+            // 只显示描边，填充透明
+            var mat = _meshRenderer.material;
+            if (mat != null && mat.HasProperty("_MainColor"))
+            {
+                var c = mat.GetColor("_MainColor");
+                c.a = 0f;
+                mat.SetColor("_MainColor", c);
+            }
+        }
         StopAllCoroutines();
         StartCoroutine(BlinkMesh());
     }