diff --git a/categories.ftl b/categories.ftl
index a7fdc50..b756ee3 100644
--- a/categories.ftl
+++ b/categories.ftl
@@ -69,9 +69,9 @@
     </div>
 </div>
 <#if settings.category_radar!true>
-<style type="text/css">
+<style>
     .tag-contents {
-        margin-top: 14px;
+        margin: 14px 0;
     }
     #category-echarts {
         width: 100%;
diff --git a/footer.ftl b/footer.ftl
index 88fb7f6..a50c8ed 100644
--- a/footer.ftl
+++ b/footer.ftl
@@ -282,7 +282,7 @@
 </script>
 </#if>
 <#if settings.category_radar!true>
-<script src="${res_base_url!}/source/js/echarts/echarts.min.js" defer></script>
+<script src="${res_base_url!}/source/js/echarts/echarts.min.js" async defer></script>
 <script type='text/javascript'>
 	var categoryRadar = {
 		<@categoryTag method="list">
diff --git a/header.ftl b/header.ftl
index 4152df6..6e44168 100644
--- a/header.ftl
+++ b/header.ftl
@@ -28,7 +28,7 @@
 	<link rel="stylesheet" href="${res_base_url!}/source/lib/justifiedGallery/justifiedGallery.min.css" media="noexist" onload="this.media='all'">
 	</#if>
 	<#if settings.katex!false && (is_post?? || is_sheet??)>
-		<link rel="stylesheet" href="https://unpkg.com/katex@0.12.0/dist/katex.min.css" />
+		<link rel="stylesheet" href="https://unpkg.com/katex@0.12.0/dist/katex.min.css" media="noexist" onload="this.media='all'"/>
 	</#if>
 	<#include "inc/decorate.ftl">
 	<script type="text/javascript">
diff --git a/settings.yaml b/settings.yaml
index e01c758..5a8fbce 100644
--- a/settings.yaml
+++ b/settings.yaml
@@ -658,12 +658,6 @@ comment:
           label: 开启
         - value: false
           label: 关闭
-    comment_gravatar_source:
-      name: comment_gravatar_source
-      label: Gravatar 源地址
-      type: text
-      default: "//cn.gravatar.com/avatar"
-      description: "暂时用于适配 Halo 1.4.8 以下用户，当主题最低要求 Halo 1.4.8 之后将移除"
     comment_loading_style:
       name: comment_loading_style
       label: 评论加载样式
@@ -1959,11 +1953,11 @@ others:
       name: cdn_href
       label: CDN 地址
       type: select
-      default: "//takagi-api.com/file/1/halo-theme-sakura/"
+      default: "https://takagi-api.com/file/1/halo-theme-sakura/"
       options:
-        - value: "//takagi-api.com/file/1/halo-theme-sakura/"
+        - value: "https:///takagi-api.com/file/1/halo-theme-sakura/"
           label: takagiの公共资源库
-        - value: "//cdn.jsdelivr.net/gh/LIlGG/halo-theme-sakura@"
+        - value: "https://cdn.jsdelivr.net/gh/LIlGG/halo-theme-sakura@"
           label: jsdelivr
     i18n:
       name: i18n