dd zindex 调整一完成，优化技能动画

assets/resources/game/hero/top.prefab

@@ -100,7 +100,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 11.501,
+      "y": 7.59,
       "z": 0
     },
     "_lrot": {
@@ -369,8 +369,6 @@
       "__id__": 0
     },
     "fileId": "f2myW76VRBr7QDUKzNBD0m",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -404,7 +402,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 4.35,
+      "y": 0.439,
       "z": 0
     },
     "_lrot": {
@@ -673,8 +671,6 @@
       "__id__": 0
     },
     "fileId": "ccpjZ8TLVIGazawaY3ULHg",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -708,7 +704,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 8.374,
+      "y": 4.463,
       "z": 0
     },
     "_lrot": {
@@ -977,8 +973,6 @@
       "__id__": 0
     },
     "fileId": "4bGUhFXlZF/Jdkcq0HY9ai",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {
@@ -1012,7 +1006,7 @@
     "_lpos": {
       "__type__": "cc.Vec3",
       "x": 0,
-      "y": 14.442,
+      "y": 10.531,
       "z": 0
     },
     "_lrot": {
@@ -1483,8 +1477,6 @@
       "__id__": 0
     },
     "fileId": "16MuhUBUpB2ZdBTYflEf1n",
-    "instance": null,
-    "targetOverrides": null,
     "nestedPrefabInstanceRoots": null
   },
   {