diff --git a/IconGenerator.cs b/IconGenerator.cs
index b09f2a6..0c4ea6f 100644
--- a/IconGenerator.cs
+++ b/IconGenerator.cs
@@ -93,23 +93,57 @@ namespace TimerApp
             int clockSize = size - margin * 2;
             Rectangle rect = new Rectangle(margin, margin, clockSize, clockSize);
 
+            // 定义轮廓颜色和宽度
+            Color outlineColor = Color.FromArgb(64, 64, 64);
+            float mainWidth = Math.Max(2, size / 16f);
+            float outlineWidth = mainWidth + Math.Max(1, size / 32f);
+            float handWidth = Math.Max(2, size / 22f);
+            float handOutlineWidth = handWidth + Math.Max(1, size / 32f);
+
+            // 1. 绘制耳朵 (先画轮廓)
+            using (Pen outlinePen = new Pen(outlineColor, Math.Max(1, size / 32f)))
             using (Brush earBrush = new SolidBrush(Color.White))
             {
+                // 左耳
+                g.DrawPie(outlinePen, 0, 0, size / 2, size / 2, 200, 50);
                 g.FillPie(earBrush, 0, 0, size / 2, size / 2, 200, 50);
+
+                // 右耳
+                g.DrawPie(outlinePen, size / 2, 0, size / 2, size / 2, 290, 50);
                 g.FillPie(earBrush, size / 2, 0, size / 2, size / 2, 290, 50);
             }
 
-            using (Pen pen = new Pen(Color.White, Math.Max(2, size / 16)))
+            // 2. 绘制表盘外圈 (先画轮廓)
+            using (Pen outlinePen = new Pen(outlineColor, outlineWidth))
+            using (Pen pen = new Pen(Color.White, mainWidth))
+            using (Brush bgBrush = new SolidBrush(Color.Black))
             {
+                // 填充表盘背景，确保浅色模式下也能看清
+                g.FillEllipse(bgBrush, rect);
+                g.DrawEllipse(outlinePen, rect);
                 g.DrawEllipse(pen, rect);
             }
 
+            // 3. 绘制指针 (先画轮廓)
             Point center = new Point(size / 2, size / 2);
-            using (Pen handPen = new Pen(Color.LightGreen, Math.Max(2, size / 22)))
+            Point handEnd1 = new Point(center.X + Math.Max(2, size * 10 / 64), center.Y - Math.Max(2, size * 10 / 64));
+            Point handEnd2 = new Point(center.X, center.Y - Math.Max(3, size * 18 / 64));
+
+            using (Pen outlinePen = new Pen(outlineColor, handOutlineWidth))
+            using (Pen handPen = new Pen(Color.LightGreen, handWidth))
             {
+                outlinePen.EndCap = LineCap.Round;
+                outlinePen.StartCap = LineCap.Round;
                 handPen.EndCap = LineCap.Round;
-                g.DrawLine(handPen, center, new Point(center.X + Math.Max(2, size * 10 / 64), center.Y - Math.Max(2, size * 10 / 64)));
-                g.DrawLine(handPen, center, new Point(center.X, center.Y - Math.Max(3, size * 18 / 64)));
+                handPen.StartCap = LineCap.Round;
+
+                // 指针1
+                g.DrawLine(outlinePen, center, handEnd1);
+                g.DrawLine(handPen, center, handEnd1);
+
+                // 指针2
+                g.DrawLine(outlinePen, center, handEnd2);
+                g.DrawLine(handPen, center, handEnd2);
             }
         }
     }
diff --git a/Properties/app.ico b/Properties/app.ico
new file mode 100644
index 0000000..a5e8b8b
Binary files /dev/null and b/Properties/app.ico differ
diff --git a/TimerApp.csproj b/TimerApp.csproj
index a3de757..8f4348c 100644
--- a/TimerApp.csproj
+++ b/TimerApp.csproj
@@ -6,6 +6,7 @@
     <Nullable>enable</Nullable>
     <UseWindowsForms>true</UseWindowsForms>
     <ImplicitUsings>enable</ImplicitUsings>
+    <ApplicationIcon>Properties\app.ico</ApplicationIcon>
   </PropertyGroup>
 
 </Project>