diff --git a/app/src/main/res/drawable/bg_tts_button.xml b/app/src/main/res/drawable/bg_tts_button.xml
index f77c685..40625ab 100644
--- a/app/src/main/res/drawable/bg_tts_button.xml
+++ b/app/src/main/res/drawable/bg_tts_button.xml
@@ -2,5 +2,5 @@
 <!-- TTS 悬浮按钮背景：半透明圆形 -->
 <shape xmlns:android="http://schemas.android.com/apk/res/android"
     android:shape="oval">
-    <solid android:color="#80FFFFFF" />
+    <solid android:color="#4DFFFFFF" />
 </shape>
diff --git a/app/src/main/res/layout/fragment_task_list.xml b/app/src/main/res/layout/fragment_task_list.xml
index 3973e87..7c649f2 100644
--- a/app/src/main/res/layout/fragment_task_list.xml
+++ b/app/src/main/res/layout/fragment_task_list.xml
@@ -365,14 +365,15 @@
             </LinearLayout>
         </ScrollView>
 
-        <!-- TTS 语音播报悬浮按钮：右侧垂直居中，48dp 触摸区 -->
+        <!-- TTS 语音播报悬浮按钮：右侧垂直居中，56dp 触摸区 -->
         <ImageView
             android:id="@+id/btnTts"
-            android:layout_width="48dp"
-            android:layout_height="48dp"
+            android:layout_width="56dp"
+            android:layout_height="56dp"
             android:layout_gravity="center_vertical|end"
             android:layout_marginEnd="4dp"
-            android:padding="8dp"
+            android:layout_marginBottom="60dp"
+            android:padding="10dp"
             android:src="@drawable/ic_speaker"
             android:background="@drawable/bg_tts_button"
             android:contentDescription="语音播报" />