diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorSkin.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorSkin.java
index 6261e70c1..238c4f9ae 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorSkin.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorSkin.java
@@ -277,19 +277,19 @@ public class DecoratorSkin extends SkinBase<Decorator> {
     }
 
     private boolean isRightEdge(double x, double y, Bounds boundsInParent) {
-        return x < root.getWidth() && x > root.getWidth() - root.snappedLeftInset();
+        return x < root.getWidth() && x >= root.getWidth() - root.snappedLeftInset();
     }
 
     private boolean isTopEdge(double x, double y, Bounds boundsInParent) {
-        return y >= 0 && y < root.snappedLeftInset();
+        return y >= 0 && y <= root.snappedTopInset();
     }
 
     private boolean isBottomEdge(double x, double y, Bounds boundsInParent) {
-        return y < root.getHeight() && y > root.getHeight() - root.snappedLeftInset();
+        return y < root.getHeight() && y >= root.getHeight() - root.snappedLeftInset();
     }
 
     private boolean isLeftEdge(double x, double y, Bounds boundsInParent) {
-        return x >= 0 && x < root.snappedLeftInset();
+        return x >= 0 && x <= root.snappedLeftInset();
     }
 
     private boolean setStageWidth(double width) {
diff --git a/HMCL/src/main/resources/assets/css/root.css b/HMCL/src/main/resources/assets/css/root.css
index b9930efd3..e96b15872 100644
--- a/HMCL/src/main/resources/assets/css/root.css
+++ b/HMCL/src/main/resources/assets/css/root.css
@@ -1119,8 +1119,8 @@
 }
 
 .resize-border {
-    -fx-border-color: -fx-base-color;
-    -fx-border-width: 2;
+    -fx-border-color: black;
+    -fx-border-width: 1;
 }
 
 .debug-border {