diff --git a/scss/self.scss b/scss/self.scss
index 7eb07b2..a950fd6 100644
--- a/scss/self.scss
+++ b/scss/self.scss
@@ -1,5 +1,7 @@
 @use "lib/viewport";
 
+$home_bg_image: "" !default;
+
 #main-outlet {
   @if $home_bg_image != "" {
     background-image: url($home_bg_image);
diff --git a/settings.yml b/settings.yml
index 2565c96..249b4de 100644
--- a/settings.yml
+++ b/settings.yml
@@ -17,28 +17,28 @@ home_bg_image:
 
 extra_glass_morphism_selectors:
   type: list
-  default:
-    - .regular.ember-view
-    - .user-main
-    - .reviewable
-    - .admin-content
-    - .contents.clearfix.body-page
-    - .search-container
-    - .show-badge
-    - .users-directory
-    - "#main-outlet>.edit-category"
-    - .container.groups-index
-    - .container.group
+  default: |
+    .regular.ember-view
+    .user-main
+    .reviewable
+    .admin-content
+    .contents.clearfix.body-page
+    .search-container
+    .show-badge
+    .users-directory
+    #main-outlet>.edit-category
+    .container.groups-index
+    .container.group
   description: "额外应用毛玻璃效果的选择器列表"
 
 extra_card_item_selectors:
   type: list
-  default:
-    - .topic-post.clearfix.regular
-    - .post-list-item.user-stream-item
-    - .search-header
-    - .admin-plugin-config-page__content
-    - ".user-main .about.collapsed-info .details"
-    - .ember-view.group-box
+  default: |
+    .topic-post.clearfix.regular
+    .post-list-item.user-stream-item
+    .search-header
+    .admin-plugin-config-page__content
+    .user-main .about.collapsed-info .details
+    .ember-view.group-box
   description: "额外应用卡片项目样式的选择器列表"