diff --git a/code/th_01_base.js b/code/th_01_base.js
index 84ec7aa..df88170 100644
--- a/code/th_01_base.js
+++ b/code/th_01_base.js
@@ -99,9 +99,9 @@ var ConfigValidator = {
     LONG_PRESS_MS: { type: "int", min: 200, max: 2000, default: 600 },
     LONG_PRESS_VIBRATE_MS: { type: "int", min: 10, max: 100, default: 40 },
     CLICK_SLOP_DP: { type: "int", min: 2, max: 20, default: 6 },
-    TOOLAPP_BACK_EDGE_WIDTH_DP: { type: "int", min: 12, max: 48, default: 22 },
-    TOOLAPP_BACK_COMMIT_DISTANCE_DP: { type: "int", min: 48, max: 160, default: 72 },
-    TOOLAPP_BACK_PROGRESS_DISTANCE_DP: { type: "int", min: 120, max: 320, default: 180 },
+    TOOLAPP_BACK_EDGE_WIDTH_DP: { type: "int", min: 1, max: 120, default: 22 },
+    TOOLAPP_BACK_COMMIT_DISTANCE_DP: { type: "int", min: 1, max: 480, default: 72 },
+    TOOLAPP_BACK_PROGRESS_DISTANCE_DP: { type: "int", min: 1, max: 720, default: 180 },
 
     // 功能开关
     ENABLE_SNAP_TO_EDGE: { type: "bool", default: true },
@@ -844,9 +844,9 @@ var ConfigManager = {
 
         { type: "section", name: "触摸与手势" },
         { key: "CLICK_SLOP_DP", name: "点击位移阈值(dp)", type: "int", min: 1, max: 40, step: 1 },
-        { key: "TOOLAPP_BACK_EDGE_WIDTH_DP", name: "设置页返回边界宽度", type: "int", min: 12, max: 48, step: 1 },
-        { key: "TOOLAPP_BACK_COMMIT_DISTANCE_DP", name: "设置页返回触发距离", type: "int", min: 48, max: 160, step: 1 },
-        { key: "TOOLAPP_BACK_PROGRESS_DISTANCE_DP", name: "设置页返回动画距离", type: "int", min: 120, max: 320, step: 1 },
+        { key: "TOOLAPP_BACK_EDGE_WIDTH_DP", name: "设置页返回边界宽度", type: "int", min: 1, max: 120, step: 1 },
+        { key: "TOOLAPP_BACK_COMMIT_DISTANCE_DP", name: "设置页返回触发距离", type: "int", min: 1, max: 480, step: 1 },
+        { key: "TOOLAPP_BACK_PROGRESS_DISTANCE_DP", name: "设置页返回动画距离", type: "int", min: 1, max: 720, step: 1 },
         { key: "ENABLE_LONG_PRESS", name: "启用长按", type: "bool" },
         { key: "LONG_PRESS_MS", name: "长按判定(ms)", type: "int", min: 200, max: 2000, step: 10 },
         { key: "LONG_PRESS_HAPTIC_ENABLE", name: "长按震动反馈", type: "bool" },
diff --git a/code/th_15_extra.js b/code/th_15_extra.js
index cd93ae1..9baac15 100644
--- a/code/th_15_extra.js
+++ b/code/th_15_extra.js
@@ -788,8 +788,8 @@ FloatBallAppWM.prototype.createToolAppEdgeBackStrip = function(edge) {
             moved = true;
             var triggerDp = Number(self.config.TOOLAPP_BACK_PROGRESS_DISTANCE_DP || 180);
             if (isNaN(triggerDp)) triggerDp = 180;
-            if (triggerDp < 120) triggerDp = 120;
-            if (triggerDp > 320) triggerDp = 320;
+            if (triggerDp < 1) triggerDp = 1;
+            if (triggerDp > 720) triggerDp = 720;
             var triggerDistance = self.dp(triggerDp);
             var p = Math.min(1, Math.abs(mx) / triggerDistance);
             self.applyToolAppBackPreviewProgress(edge, p);
@@ -801,8 +801,8 @@ FloatBallAppWM.prototype.createToolAppEdgeBackStrip = function(edge) {
           var uy = event.getRawY() - downY;
           var commitDp = Number(self.config.TOOLAPP_BACK_COMMIT_DISTANCE_DP || 72);
           if (isNaN(commitDp)) commitDp = 72;
-          if (commitDp < 48) commitDp = 48;
-          if (commitDp > 160) commitDp = 160;
+          if (commitDp < 1) commitDp = 1;
+          if (commitDp > 480) commitDp = 480;
           var completeDistance = self.dp(commitDp);
           var okDir = (edge === 0 && ux > completeDistance) || (edge === 1 && ux < -completeDistance);
           var ok = (action === android.view.MotionEvent.ACTION_UP) && moved && okDir && Math.abs(ux) > Math.abs(uy) * 1.2;
@@ -846,8 +846,8 @@ FloatBallAppWM.prototype.showToolAppScreenBackStrips = function() {
     }
     var stripDp = Number(this.config.TOOLAPP_BACK_EDGE_WIDTH_DP || 22);
     if (isNaN(stripDp)) stripDp = 22;
-    if (stripDp < 12) stripDp = 12;
-    if (stripDp > 48) stripDp = 48;
+    if (stripDp < 1) stripDp = 1;
+    if (stripDp > 120) stripDp = 120;
     var stripW = this.dp(stripDp);
     var flags = android.view.WindowManager.LayoutParams.FLAG_NOT_FOCUSABLE |
       android.view.WindowManager.LayoutParams.FLAG_LAYOUT_NO_LIMITS;
diff --git a/manifest.json b/manifest.json
index c834213..b6ed96e 100644
--- a/manifest.json
+++ b/manifest.json
@@ -2,8 +2,8 @@
   "alg": "SHA256withRSA",
   "files": {
     "th_01_base.js": {
-      "sha256": "49b97160e851877c00fe6cebbc2e94edee87b2b0cc63e76237e58d31af7bb8b8",
-      "size": 54172
+      "sha256": "b1ff842821c7d7c8d40543f74ba54134289d7ff4bb412c439ee0e96756744f95",
+      "size": 54166
     },
     "th_02_core.js": {
       "sha256": "15bb9bfbd19a673d442e221b0a00a456ed5f87af2666b9c73b117d6223faeecd",
@@ -58,8 +58,8 @@
       "size": 262019
     },
     "th_15_extra.js": {
-      "sha256": "f3e92febb017f88cb5484d368e10bd6d69baa7dd50ac39c01c381fa9d7f71bd5",
-      "size": 96070
+      "sha256": "b927a12da2a2c71099ca166d838cf982a4c0420ce47301ec5fa3da58047a5c97",
+      "size": 96064
     },
     "th_16_entry.js": {
       "sha256": "e7c99c3dfbd6aedab05551426955081ae6cae034754f2f557cefa01dc75dc001",
@@ -68,5 +68,5 @@
   },
   "keyId": "toolhub-targets-2026-rsa3072",
   "schema": 2,
-  "version": 20260518162547
+  "version": 20260518163640
 }
diff --git a/manifest.sig b/manifest.sig
index 567c378..ba1f3f8 100644
--- a/manifest.sig
+++ b/manifest.sig
@@ -1 +1 @@
-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