diff --git a/src/assets/css/theme/vuepress-markdown.css b/src/assets/css/theme/vuepress-markdown.css
index ab2bbf8d..b3b0920f 100644
--- a/src/assets/css/theme/vuepress-markdown.css
+++ b/src/assets/css/theme/vuepress-markdown.css
@@ -275,7 +275,11 @@
 .vuepress-markdown-body div[class~='v-md-pre-wrapper-php']::before {
   content: 'php';
 }
-.vuepress-markdown-body .arrow {
+.vuepress-markdown-body
+.arrow.up,
+.arrow.down,
+.arrow.left,
+.arrow.right {
   display: inline-block;
   width: 0;
   height: 0;