题卡方框元件预览样式问题修复

src/modules/card/assets/styles/card-preview.scss

@@ -1482,6 +1482,10 @@
     }
   }
 }
+// elem-pane
+.elem-pane {
+  height: 100%;
+}
 
 // card-free-preview
 .card-free-preview {