diff --git a/app/static/js/highlight.js b/app/static/js/highlight.js
index 76b4793..2ea9664 100644
--- a/app/static/js/highlight.js
+++ b/app/static/js/highlight.js
@@ -43,11 +43,12 @@ function highLight() {
     // 删除所有的mark标签,防止标签发生嵌套
     articleContent = articleContent.replace(/<(mark)[^>]*>/gi, "");
     articleContent = articleContent.replace(/<(\/mark)[^>]*>/gi, "");
-    // 将文章中所有出现该单词word的地方改为："<mark>" + word + "<mark>"。
+    // 将文章中所有出现该单词word的地方改为："<span class='highlighted'>" + word + "</span>"。
     for (let word of totalSet) {
-        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<mark>" + word + "</mark>");
+        articleContent = articleContent.replace(new RegExp("\\b" + word + "\\b", "g"), "<span class='highlighted'>" + word + "</span>");
     }
     document.getElementById("article").innerHTML = articleContent;
+
 }
 
 function cancelHighlighting() {