diff --git a/css/style.css b/css/style.css
index 7b6911b..1c7192a 100644
--- a/css/style.css
+++ b/css/style.css
@@ -450,7 +450,7 @@ iconify-icon {
 
 
 
-.flowchart {
+#mermaidSvg {
     width: 100%;
     height: 100%;
     object-fit: contain;
diff --git a/js/core/app-shell.js b/js/core/app-shell.js
index 90f6742..6124811 100644
--- a/js/core/app-shell.js
+++ b/js/core/app-shell.js
@@ -1220,7 +1220,7 @@
       if (!code.trim()) {
         throw new Error('缺少 Mermaid 代码，无法渲染');
       }
-      const { svg } = await window.mermaid.render(renderId, code);
+      const { svg } = await window.mermaid.render("mermaidSvg", code);
       const updatedArtifact = {
         ...artifact,
         svgContent: svg