1 files changed, 5 insertions, 5 deletions
diff --git a/files/zh-cn/web/css/border-bottom-right-radius/index.html b/files/zh-cn/web/css/border-bottom-right-radius/index.html
index d63776da87..8c69521fce 100644
--- a/files/zh-cn/web/css/border-bottom-right-radius/index.html
+++ b/files/zh-cn/web/css/border-bottom-right-radius/index.html
@@ -71,7 +71,7 @@ border-bottom-right-radius: inherit;</pre>
   <tr>
    <td style="padding: 1.5em;">
     <div style="background-color: lightgreen; border: solid 1px black; border-bottom-right-radius: 40px 40px; width: 100px; height: 100px;">
-    <div style="display: none;">.</div>
+    <div class="hidden">.</div>
     </div>
    </td>
    <td>An arc of circle is used as the border
@@ -85,7 +85,7 @@ div {
   <tr>
    <td style="padding: 1.5em;">
     <div style="background-color: lightgreen; border: solid 1px black; border-bottom-right-radius: 40px 20px; width: 100px; height: 100px;">
-    <div style="display: none;">.</div>
+    <div class="hidden">.</div>
     </div>
    </td>
    <td>An arc of ellipse is used as the border
@@ -99,7 +99,7 @@ div {
   <tr>
    <td style="padding: 1.5em;">
     <div style="background-color: lightgreen; border: solid 1px black; border-bottom-right-radius: 40%; width: 100px; height: 100px;">
-    <div style="display: none;">.</div>
+    <div class="hidden">.</div>
     </div>
    </td>
    <td>The box is a square: an arc of circle is used as the border
@@ -113,7 +113,7 @@ div {
   <tr>
    <td style="padding: 1.5em;">
     <div style="background-color: lightgreen; border: solid 1px black; border-bottom-right-radius: 40%; width: 100px; height: 200px;">
-    <div style="display: none;">.</div>
+    <div class="hidden">.</div>
     </div>
    </td>
    <td>The box is not a square: an arc of ellipse is used as the border
@@ -127,7 +127,7 @@ div {
   <tr>
    <td style="padding: 1.5em;">
     <div style="border: black 3px double; border-bottom-right-radius: 40%; height: 100px; width: 100px; background-color: rgb(250,20,70); background-clip: content-box;">
-    <div style="display: none;">.</div>
+    <div class="hidden">.</div>
     </div>
    </td>
    <td>The background color is clipped at the border