diff --git a/app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt b/app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt
index 96a92f5..0cf411c 100644
--- a/app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt
+++ b/app/src/main/java/com/xiaoqu/watch/ui/task/TaskListFragment.kt
@@ -444,15 +444,17 @@ class TaskListFragment : BaseFragment<FragmentTaskListBinding>() {
         }
     }
 
-    /** 全屏显示大图（覆盖在当前页面上，点击任意位置关闭） */
+    /** 全屏显示大图（覆盖在 Activity 窗口顶层，点击关闭） */
     private fun showFullImage(url: String) {
-        val container = requireActivity().findViewById<FrameLayout>(R.id.dialog_container)
+        Timber.d("查看大图: $url")
+        // 使用 Activity 的 decorView 确保在最顶层
+        val rootView = requireActivity().window.decorView as ViewGroup
         val overlay = FrameLayout(requireContext()).apply {
-            layoutParams = FrameLayout.LayoutParams(
-                FrameLayout.LayoutParams.MATCH_PARENT,
-                FrameLayout.LayoutParams.MATCH_PARENT
+            layoutParams = ViewGroup.LayoutParams(
+                ViewGroup.LayoutParams.MATCH_PARENT,
+                ViewGroup.LayoutParams.MATCH_PARENT
             )
-            setBackgroundColor(0xE0000000.toInt())
+            setBackgroundColor(0xFF000000.toInt())
             isClickable = true
             isFocusable = true
         }
@@ -464,13 +466,11 @@ class TaskListFragment : BaseFragment<FragmentTaskListBinding>() {
             scaleType = android.widget.ImageView.ScaleType.FIT_CENTER
         }
         overlay.addView(imageView)
-        container.addView(overlay)
-        // 点击任意位置关闭（包括图片本身）
-        val dismiss = { container.removeView(overlay) }
-        overlay.setOnClickListener { dismiss() }
-        imageView.setOnClickListener { dismiss() }
+        rootView.addView(overlay)
+        // 点击任意位置关闭
+        overlay.setOnClickListener { rootView.removeView(overlay) }
+        imageView.setOnClickListener { rootView.removeView(overlay) }
         // 加载大图
-        Timber.d("查看大图: $url")
         loadImage(imageView, url)
     }