diff --git a/src/app.css b/src/app.css
index 23e33f6..1c8d6e3 100644
--- a/src/app.css
+++ b/src/app.css
@@ -1550,9 +1550,10 @@ footer section p:first-child {
 		text-shadow: none !important;
 	}
 
-	/* 隐藏目录、浮动按钮面板、页脚、顶栏导航、代码块操作按钮 */
+	/* 隐藏目录、浮动按钮面板、页脚、顶栏导航、代码块操作按钮及目录切换按钮 */
 	.TOC,
 	#ctrler-panel,
+	#toggle-toc,
 	footer,
 	header nav,
 	header .mobile-menu-btn,