diff --git a/art/sprites.py b/art/sprites.py
index 1a83c01..49d4482 100644
--- a/art/sprites.py
+++ b/art/sprites.py
@@ -739,11 +739,20 @@ def hw_selected():
     return c
 
 
+def hw_groove():
+    """PLEDGER 墨水屏输入框凹槽（12×12，九宫格边 2）：浅色底、1 像素深墨边。"""
+    c = Canvas(12, 12)
+    c.rect(0, 0, 11, 11, 'n')
+    c.rect(1, 1, 10, 10, 'P')
+    return c
+
+
 UI_ICONS = {'ui_bank': ui_bank, 'ui_poinbase': ui_poinbase, 'ui_web3': ui_web3}
 UI_ICONS['ui_hw_shell'] = lambda: rounded(32, 7, 'K', 'E', 'z')
 UI_ICONS['ui_hw_bezel'] = lambda: rounded(16, 4, 'n')
 UI_ICONS['ui_hw_paper'] = lambda: rounded(12, 2, 'P')
 UI_ICONS['ui_hw_sel'] = hw_selected
+UI_ICONS['ui_hw_groove'] = hw_groove
 UI_ICONS['ui_hw_ok'] = lambda: hw_button('ok')
 UI_ICONS['ui_hw_no'] = lambda: hw_button('no')
 
diff --git a/src/Decentralized/ModFiles/Textures/Items/ui_hw_groove.png b/src/Decentralized/ModFiles/Textures/Items/ui_hw_groove.png
new file mode 100644
index 0000000..163ef61
Binary files /dev/null and b/src/Decentralized/ModFiles/Textures/Items/ui_hw_groove.png differ
diff --git a/src/Decentralized/PledgerSkin.cs b/src/Decentralized/PledgerSkin.cs
index 737a478..19ed5ae 100644
--- a/src/Decentralized/PledgerSkin.cs
+++ b/src/Decentralized/PledgerSkin.cs
@@ -56,6 +56,35 @@ namespace Decentralized
             img.color = Color.white;
         }
 
+        /// <summary>把输入框切片为墨水屏凹槽：浅色底、1 像素深墨边框（1:1 像素映射）。</summary>
+        public static void SliceGroove(Image img)
+        {
+            if (img == null) return;
+            if (!Sliced.TryGetValue("ui_hw_groove", out var sp))
+            {
+                var src = Items.ModSprite("ui_hw_groove");
+                if (src != null)
+                {
+                    src.texture.filterMode = FilterMode.Point;
+                    sp = Sprite.Create(src.texture, src.rect, new Vector2(0.5f, 0.5f), src.pixelsPerUnit, 0, SpriteMeshType.FullRect, new Vector4(2, 2, 2, 2));
+                }
+                else
+                {
+                    var tex = new Texture2D(12, 12, TextureFormat.RGBA32, false) { filterMode = FilterMode.Point };
+                    for (int y = 0; y < 12; y++)
+                        for (int x = 0; x < 12; x++)
+                            tex.SetPixel(x, y, (x == 0 || x == 11 || y == 0 || y == 11) ? Ink : Paper);
+                    tex.Apply();
+                    sp = Sprite.Create(tex, new Rect(0, 0, 12, 12), new Vector2(0.5f, 0.5f), 100f, 0, SpriteMeshType.FullRect, new Vector4(2, 2, 2, 2));
+                }
+                Sliced["ui_hw_groove"] = sp;
+            }
+            img.sprite = sp;
+            img.type = Image.Type.Sliced;
+            img.pixelsPerUnitMultiplier = 100f / sp.pixelsPerUnit;
+            img.color = Color.white;
+        }
+
         /// <summary>屏上的选择按钮（币种、档位、子页）：选中的一个画成白底黑框黑字、四角带准星角标。</summary>
         public static void Pick(CustomUIBuilder b, string text, bool selected, Action onClick, ICollection<GameObject> picked)
         {
@@ -155,9 +184,11 @@ namespace Decentralized
                 t.color = t.gameObject.name.Contains("_note") ? Alert : t.gameObject.name.Contains("_dim") ? Dim : Ink;
             }
 
-            // 屏上输入框
+            // 屏上输入框：墨水屏凹槽样式（浅色底、深墨 1px 边、深墨文字、灰色占位符）
             foreach (var inp in screen.GetComponentsInChildren<TMP_InputField>(true))
             {
+                var bg = inp.GetComponent<Image>() ?? inp.targetGraphic as Image;
+                if (bg != null) SliceGroove(bg);
                 if (inp.textComponent != null) inp.textComponent.color = Ink;
                 if (inp.placeholder is TextMeshProUGUI ph) ph.color = Dim;
             }