[ci skip] Fix #3869

Close #3978
Close #3979
diff --git a/user_guide_src/source/_themes/sphinx_rtd_theme/static/css/citheme.css b/user_guide_src/source/_themes/sphinx_rtd_theme/static/css/citheme.css
new file mode 100644
index 0000000..10e7d04
--- /dev/null
+++ b/user_guide_src/source/_themes/sphinx_rtd_theme/static/css/citheme.css
@@ -0,0 +1,7 @@
+@import 'theme.css';
+
+.highlighted {
+	padding: 0px !important;
+	font-weight: inherit !important;
+	background-color: #f1d40f !important;	
+}
\ No newline at end of file
diff --git a/user_guide_src/source/_themes/sphinx_rtd_theme/theme.conf b/user_guide_src/source/_themes/sphinx_rtd_theme/theme.conf
index dcfbf8c..5814ac9 100644
--- a/user_guide_src/source/_themes/sphinx_rtd_theme/theme.conf
+++ b/user_guide_src/source/_themes/sphinx_rtd_theme/theme.conf
@@ -1,6 +1,6 @@
 [theme]
 inherit = basic
-stylesheet = css/theme.css
+stylesheet = css/citheme.css
 
 [options]
 typekit_id = hiw1hhg