diff --git a/components/canvas/CanvasWorkspace.tsx b/components/canvas/CanvasWorkspace.tsx
index f6063a9..dfa31a8 100644
--- a/components/canvas/CanvasWorkspace.tsx
+++ b/components/canvas/CanvasWorkspace.tsx
@@ -137,6 +137,10 @@ export function CanvasWorkspace() {
   const updateNode = useCanvasStore((state) => state.updateNode);
   const clearLastAddedNodeId = useCanvasStore((state) => state.clearLastAddedNodeId);
   const centerTimeoutRef = useRef<number | null>(null);
+  const isMacPlatform = React.useMemo(() => {
+    if (typeof navigator === "undefined") return false;
+    return /Mac|iPhone|iPad|iPod/i.test(navigator.platform);
+  }, []);
 
   const toCanvasPosition = useCallback((clientX: number, clientY: number): Position => {
     const rect = containerRef.current?.getBoundingClientRect();
@@ -266,11 +270,11 @@ export function CanvasWorkspace() {
   // 处理滚轮缩放
   const handleWheel = useCallback((e: React.WheelEvent) => {
     e.preventDefault();
+    e.stopPropagation();
 
-    // mac 触控板优化：
-    // 1) 双指滚动默认平移画布
-    // 2) pinch(通常会触发 ctrlKey) 或 Cmd/Ctrl + 滚轮时缩放
-    const shouldZoom = e.ctrlKey || e.metaKey;
+    // mac: 双指滚动默认平移，Cmd/Ctrl+滚轮才缩放（保留触控板体验）
+    // windows/linux: 鼠标滚轮默认缩放画布，不触发整页缩放
+    const shouldZoom = isMacPlatform ? (e.ctrlKey || e.metaKey) : !e.shiftKey;
     if (!shouldZoom) {
       setViewport({
         x: viewport.x - e.deltaX,
@@ -289,7 +293,7 @@ export function CanvasWorkspace() {
     const newX = mouseX - (mouseX - viewport.x) * scaleChange;
     const newY = mouseY - (mouseY - viewport.y) * scaleChange;
     setViewport({ x: newX, y: newY, zoom: newZoom });
-  }, [setViewport, viewport.x, viewport.y, viewport.zoom]);
+  }, [isMacPlatform, setViewport, viewport.x, viewport.y, viewport.zoom]);
 
   const getImageDimensionsFromFile = useCallback((file: File): Promise<{ width: number; height: number }> => {
     return new Promise((resolve) => {