diff --git a/src/FluTheme.cpp b/src/FluTheme.cpp
index 4372d971..7ab80d2c 100644
--- a/src/FluTheme.cpp
+++ b/src/FluTheme.cpp
@@ -5,9 +5,10 @@
 #if (QT_VERSION >= QT_VERSION_CHECK(6, 5, 0))
 #include <QStyleHints>
 #elif ((QT_VERSION >= QT_VERSION_CHECK(6, 2, 1)))
-#include <QPalette>
 #include <QtGui/qpa/qplatformtheme.h>
 #include <QtGui/private/qguiapplication_p.h>
+#else
+#include <QPalette>
 #endif
 
 #include <QGuiApplication>
@@ -57,8 +58,11 @@ bool FluTheme::systemDark()
         return (theme->appearance() == QPlatformTheme::Appearance::Dark);
     }
     return false;
+#else
+    QPalette palette = qApp->palette();
+    QColor color = palette.color(QPalette::Window).rgb();
+    return !(color.red() * 0.2126 + color.green() * 0.7152 + color.blue() * 0.0722 > 255 / 2);
 #endif
-    return false;
 }
 
 bool FluTheme::dark(){
diff --git a/src/imports/FluentUI/Controls/FluPopup.qml b/src/imports/FluentUI/Controls/FluPopup.qml
index addb9882..538138e8 100644
--- a/src/imports/FluentUI/Controls/FluPopup.qml
+++ b/src/imports/FluentUI/Controls/FluPopup.qml
@@ -15,26 +15,32 @@ Popup {
     property alias blurOpacity: blur.acrylicOpacity
     property alias blurRectX: blur.rectX
     property alias blurRectY: blur.rectY
-
     enter: Transition {
-        reversible: true
         NumberAnimation {
-            properties: "opacity,scale"
+            properties: "scale"
+            from:1.2
+            to:1
+            duration: 83
+        }
+        NumberAnimation {
+            property: "opacity"
+            duration: 83
             from:0
             to:1
-            duration: 167
-            easing.type: Easing.BezierSpline
-            easing.bezierCurve: [ 0, 0, 0, 1 ]
         }
     }
     exit:Transition {
         NumberAnimation {
-            properties: "opacity,scale"
+            properties: "scale"
+            from:1
+            to:1.2
+            duration: 83
+        }
+        NumberAnimation {
+            property: "opacity"
+            duration: 83
             from:1
             to:0
-            duration: 167
-            easing.type: Easing.BezierSpline
-            easing.bezierCurve: [ 1, 0, 0, 0 ]
         }
     }