diff --git a/Runtime/UXComponent/UX/UXGroup.cs b/Runtime/UXComponent/UX/UXGroup.cs
index 04a9d6d..fe40eea 100644
--- a/Runtime/UXComponent/UX/UXGroup.cs
+++ b/Runtime/UXComponent/UX/UXGroup.cs
@@ -137,7 +137,7 @@ public class UXGroup : UIBehaviour
     {
         if (m_Buttons.Count == 0) return;
 
-        int startIndex = _current ? m_Buttons.IndexOf(_current) : 0;
+        int startIndex = _current ? m_Buttons.IndexOf(_current) : -1;
         int newIndex = FindSelectableIndex(startIndex, 1);
 
         if (newIndex != -1)
@@ -147,31 +147,24 @@ public class UXGroup : UIBehaviour
     }
 
 
-    private int FindSelectableIndex(int startIndex, int direction)
-    {
+    private int FindSelectableIndex(int startIndex, int direction) {
         if (m_Buttons.Count == 0) return -1;
 
-        startIndex = Mathf.Clamp(startIndex, -1, m_Buttons.Count - 1);
+        // 计算当前有效起点
+        int current = (startIndex == -1) 
+            ? (direction > 0 ? 0 : m_Buttons.Count - 1)
+            : startIndex;
 
-        int fallback = -1;
+        // 单次简单循环查找
+        for (int i = 0; i < m_Buttons.Count; i++) {
+            int index = (current + direction * i + m_Buttons.Count) % m_Buttons.Count;
 
-        for (int i = 0; i < m_Buttons.Count; i++)
-        {
-            int index = (startIndex + direction + m_Buttons.Count + i * direction) % m_Buttons.Count;
-
-            index = direction < 0 ? (m_Buttons.Count - index - 1) : index;
-
-            var button = m_Buttons[index];
-
-            if (button == null || !button.isActiveAndEnabled || !button.Interactable)
-                continue;
-
-            if (fallback == -1) fallback = index;
-
-            if (_current == null)
+            if (m_Buttons[index] != null &&
+                m_Buttons[index].isActiveAndEnabled &&
+                m_Buttons[index].Interactable) {
                 return index;
+            }
         }
-
-        return fallback;
+        return -1; // 没有可用按钮
     }
 }