diff --git a/app/src/main/res/drawable/ic_center_button.xml b/app/src/main/res/drawable/ic_center_button.xml
index 4732112..06fb273 100644
--- a/app/src/main/res/drawable/ic_center_button.xml
+++ b/app/src/main/res/drawable/ic_center_button.xml
@@ -4,14 +4,11 @@
     android:height="56dp"
     android:viewportWidth="56"
     android:viewportHeight="56">
-    <circle
-        android:fillColor="#4A90E2"
-        android:cx="28"
-        android:cy="28"
-        android:r="24"/>
+    <!-- 外圆 -->
     <path
-        android:fillColor="#FFFFFF"
-        android:pathData="M28,16c-3.31,0 -6,2.69 -6,6s2.69,6 6,6 6,-2.69 6,-6 -2.69,-6 -6,-6zM28,30c-2.21,0 -4,-1.79 -4,-4s1.79,-4 4,-4 4,1.79 4,4 -1.79,4 -4,4z"/>
+        android:fillColor="#4A90E2"
+        android:pathData="M28,28m-24,0a24,24 0,1 1,48 0a24,24 0,1 1,-48 0"/>
+    <!-- 内圆高亮 -->
     <path
         android:fillColor="#66B3FF"
         android:pathData="M28,28m-8,0a8,8 0,1 1,16 0a8,8 0,1 1,-16 0"/>