diff --git a/js/script.js b/js/script.js
index b03d5ff..9b49dbf 100644
--- a/js/script.js
+++ b/js/script.js
@@ -1958,9 +1958,9 @@
         const ctx = canvas.getContext('2d');
         const container = imageContainer;
 
-        // 固定高清分辨率 1080×1920
-        const TARGET_WIDTH = 1080;
-        const TARGET_HEIGHT = 1920;
+        // 4K 超高清分辨率 2160×3840
+        const TARGET_WIDTH = 2160;
+        const TARGET_HEIGHT = 3840;
         
         // 显示尺寸（用于计算缩放比例）
         const displayWidth = container.clientWidth;