结构大修改，改成朴实无华的结构，不过度架构。能跑就行

Assets/Scripts/Fishing2~/Mono/CameraAsset.cs

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+using Cinemachine;
+
+using UnityEngine;
+
+namespace NBF.Fishing2
+{
+    public class CameraAsset : MonoBehaviour
+    {
+        public CinemachineVirtualCamera fppVCam;
+        
+        public CinemachineVirtualCamera tppVCam;
+    }
+}

Assets/Scripts/Fishing2~/Mono/CameraAsset.cs.meta

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+fileFormatVersion: 2
+guid: 5dd3e6b2217c463e94e32f15c4ea3c5c
+timeCreated: 1765306413

Assets/Scripts/Fishing2~/Mono/PlayerArm.cs

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+using RootMotion.FinalIK;
+using UnityEngine;
+
+namespace NBF
+{
+    public class PlayerArm : MonoBehaviour
+    {
+        public bool IsLeft;
+        public LimbIK IK;
+        public Transform RodContainer;
+        public Transform LeftRigMagnet;
+        public FingerRig FingerRig;
+        public PlayerShoulder Shoulder;//PlayerShoulder
+
+        [HideInInspector] public float interactionTargetWeight;
+
+
+        public void SetReelHandle(ReelAsset asset)
+        {
+            IK.solver.target = asset.handle;
+            IK.enabled = true;
+
+            // var fingers = FingerRig.fingers;
+            // foreach (var finger in fingers)
+            // {
+            //     finger.target = asset.handleEnd;
+            // }
+            
+            // // 启用整体控制
+            // FingerRig.weight = 1f;
+            //
+            // // 绑定大拇指和食指的目标
+            // FingerRig.fingers[0].target = asset.handleEnd;  // Thumb
+            // FingerRig.fingers[1].target = asset.handleEnd;  // Index
+            //
+            // FingerRig.fingers[0].weight = 1f;
+            // FingerRig.fingers[1].weight = 1f;
+
+            // 其余手指握拳（不绑定 target）
+            for (int i = 2; i < 5; i++)
+            {
+                FingerRig.fingers[i].target = null;
+                FingerRig.fingers[i].weight = 1f;
+            }
+        }
+
+        public void MoveTowardsInteraction()
+        {
+            if (!IK)
+            {
+                return;
+            }
+
+            IK.solver.SetIKPositionWeight(Mathf.MoveTowards(IK.solver.IKPositionWeight,
+                interactionTargetWeight, Time.deltaTime * 2f));
+        }
+    }
+}

Assets/Scripts/Fishing2~/Mono/PlayerArm.cs.meta

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+fileFormatVersion: 2
+guid: ed33e261a2784ee0814ceaa6c88aefdf
+timeCreated: 1756821001

Assets/Scripts/Fishing2~/Mono/PlayerShoulder.cs

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+using System;
+using UnityEngine;
+
+namespace NBF
+{
+    public class PlayerShoulder : MonoBehaviour
+    {
+        private Vector3 startEulerAngles;
+        private const int MaxAngle = 30;
+        private const int MinAngle = -30;
+
+
+        public float TestZ;
+        private void Awake()
+        {
+            startEulerAngles = transform.localEulerAngles;
+        }
+
+        public void SetCameraEulerAngleX(float value)
+        {
+            value = (value > 180f) ? value - 360f : value;
+            Debug.Log($"value={value}");
+            var addValue = value * -1;
+            if (addValue > MaxAngle)
+            {
+                addValue = MaxAngle;
+            }
+            else if (addValue < MinAngle)
+            {
+                addValue = MinAngle;
+            }
+            
+            transform.localEulerAngles =
+                new Vector3(addValue + startEulerAngles.x, startEulerAngles.y, TestZ);
+        }
+    }
+}

Assets/Scripts/Fishing2~/Mono/PlayerShoulder.cs.meta

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+fileFormatVersion: 2
+guid: f85286904d2d45738c4b415f3503d4ab
+timeCreated: 1756820965