diff --git a/web/assets/element-ui/theme-chalk/display.css b/web/assets/element-ui/theme-chalk/display.css
deleted file mode 100644
index 1d8790ba..00000000
--- a/web/assets/element-ui/theme-chalk/display.css
+++ /dev/null
@@ -1 +0,0 @@
-@media only screen and (max-width:767px){.hidden-xs-only{display:none!important}}@media only screen and (min-width:768px){.hidden-sm-and-up{display:none!important}}@media only screen and (min-width:768px) and (max-width:991px){.hidden-sm-only{display:none!important}}@media only screen and (max-width:991px){.hidden-sm-and-down{display:none!important}}@media only screen and (min-width:992px){.hidden-md-and-up{display:none!important}}@media only screen and (min-width:992px) and (max-width:1199px){.hidden-md-only{display:none!important}}@media only screen and (max-width:1199px){.hidden-md-and-down{display:none!important}}@media only screen and (min-width:1200px){.hidden-lg-and-up{display:none!important}}@media only screen and (min-width:1200px) and (max-width:1919px){.hidden-lg-only{display:none!important}}@media only screen and (max-width:1919px){.hidden-lg-and-down{display:none!important}}@media only screen and (min-width:1920px){.hidden-xl-only{display:none!important}}
\ No newline at end of file
diff --git a/web/assets/js/util/index.js b/web/assets/js/util/index.js
index 85d53352..625af8b9 100644
--- a/web/assets/js/util/index.js
+++ b/web/assets/js/util/index.js
@@ -780,4 +780,10 @@ class LanguageManager {
return languageFilter.length > 0;
}
+}
+
+class DeviceUtils {
+ static isMobile() {
+ return window.innerWidth <= 768;
+ }
}
\ No newline at end of file
diff --git a/web/html/common/head.html b/web/html/common/head.html
index ca854a30..35901769 100644
--- a/web/html/common/head.html
+++ b/web/html/common/head.html
@@ -2,10 +2,9 @@