diff --git a/assets/icon.ico b/assets/icon.ico
index a4f2b29..a84fd65 100644
Binary files a/assets/icon.ico and b/assets/icon.ico differ
diff --git a/assets/icon.png b/assets/icon.png
index c1b1e35..5f96b6f 100644
Binary files a/assets/icon.png and b/assets/icon.png differ
diff --git a/src/renderer/components/Icons.tsx b/src/renderer/components/Icons.tsx
index eeffa09..4de2ca2 100644
--- a/src/renderer/components/Icons.tsx
+++ b/src/renderer/components/Icons.tsx
@@ -28,9 +28,9 @@ export function AppIcon({ size = 80 }: IconProps) {
       {/* 左上角高光 */}
       <rect x="4" y="4" width="72" height="72" rx="16" fill="url(#app-highlight)"/>
       {/* MD 文字 */}
-      <text x="40" y="44" textAnchor="middle" dominantBaseline="central"
-            fontFamily="Georgia, 'Times New Roman', serif" fontWeight="bold" fontSize="32"
-            fill="white" letterSpacing="2">MD</text>
+      <text x="40" y="46" textAnchor="middle" dominantBaseline="central"
+            fontFamily="Georgia, 'Times New Roman', serif" fontWeight="bold" fontSize="24"
+            fill="white" letterSpacing="1.5">MD</text>
       {/* 底部装饰线 */}
       <rect x="20" y="58" width="40" height="2.5" rx="1.25" fill="white" fillOpacity="0.25"/>
     </svg>