多轮审查和修复

Assets/Scripts/Audio/FootstepAudioConfigSO.cs

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+// Assets/Scripts/Audio/FootstepAudioConfigSO.cs
+// 脚步声音效配置（Architecture 21_LiquidPuzzleModule §3.3）
+using System;
+using UnityEngine;
+
+namespace BaseGames.Audio
+{
+    [CreateAssetMenu(menuName = "BaseGames/Audio/FootstepAudioConfig")]
+    public class FootstepAudioConfigSO : ScriptableObject
+    {
+        [Serializable]
+        public struct MaterialEntry
+        {
+            public FootstepMaterial material;
+            public AudioClip[]      clips;              // 随机选一个，防止重复感
+            [Range(0f, 1f)]   public float volume;
+            [Range(0.8f, 1.2f)] public float pitchVariance; // 每次随机 pitch 偏移范围
+        }
+
+        public MaterialEntry[] entries;
+
+        public MaterialEntry? GetEntry(FootstepMaterial mat)
+        {
+            if (entries == null) return null;
+            foreach (var e in entries)
+                if (e.material == mat) return e;
+            return null;
+        }
+    }
+}