diff --git a/src/app/main.cpp b/src/app/main.cpp
index 26e63dd..bf23def 100644
--- a/src/app/main.cpp
+++ b/src/app/main.cpp
@@ -403,11 +403,11 @@ void buildWorkbench(QMainWindow& window, geopro::data::LocalSampleRepository& re
     auto* anomalyHint = new QLabel(vtkWidget);
     anomalyHint->setObjectName(QStringLiteral("anomalyHint"));
     anomalyHint->setAttribute(Qt::WA_TransparentForMouseEvents);
-    anomalyHint->setAttribute(Qt::WA_TranslucentBackground);  // 圆角外透明(否则四角露白底)
+    // 方角 + 不透明深底：避免「圆角外三角区露白底」与「半透明在 GL 子控件上渲染成灰」两个坑。
     geopro::app::applyTokenizedStyleSheet(
         anomalyHint,
-        QStringLiteral("QLabel#anomalyHint{background:rgba(10,18,30,0.85);color:#E6ECF5;"
-                       "border:1px solid {{accent/primary}};border-radius:8px;padding:8px 12px;}"));
+        QStringLiteral("QLabel#anomalyHint{background:#0E1A2D;color:#E6ECF5;"
+                       "border:1px solid {{accent/primary}};padding:8px 12px;}"));
     anomalyHint->hide();
 
     // 坐标轴设置抽屉面板：叠加 vtkWidget、工具条右侧滑出，默认隐藏（点设置 toggle）。