diff --git a/annotation-setting.yaml b/annotation-setting.yaml
index 00605cb..49df20b 100644
--- a/annotation-setting.yaml
+++ b/annotation-setting.yaml
@@ -22,22 +22,22 @@ spec:
     - $formkit: select
       name: thumbnail_mode
       label: 文章列表缩略图模式
-      value: ""
+      value: "none"
       help: '文章在列表的缩略图模式，除网格布局外，当前配置将覆盖主题中的默认配置。'
       options:
-        - value: default
+        - value: "default"
           label:  默认模式
-        - value: back
+        - value: "back"
           label:  背景图模式
-        - value: small
+        - value: "small"
           label:  小图模式（左侧）
-        - value: small-right
+        - value: "small-right"
           label:  小图模式（右侧）
-        - value: small-alter
+        - value: "small-alter"
           label:  小图模式（交替）
-        - value: fold
+        - value: "fold"
           label:  折叠模式
-        - value: ""
+        - value: "none"
           label:  跟随默认配置
     - $formkit: text
       name: tips
diff --git a/templates/main/article_list.html b/templates/main/article_list.html
index 310e024..fd86894 100644
--- a/templates/main/article_list.html
+++ b/templates/main/article_list.html
@@ -2,7 +2,7 @@
           th:fragment="articleList (posts)">
   <th:block th:each="post : ${posts}"
             th:with="thumbnail = ${#strings.isEmpty(post.spec.cover) ? #strings.isEmpty(theme.config.post.default_thumbnail) ? '' : theme.config.post.default_thumbnail + (#strings.contains(theme.config.post.default_thumbnail, '?') ? '&' : '?') + 'id=' + post.metadata.name : thumbnail.gen(post.spec.cover, 's')},
-            thumbnail_mode = ${(theme.config.post.top_thumbnail_mode == 'grid' || (!post.spec.pinned && theme.config.post.thumbnail_mode == 'grid'))? 'grid' : !#strings.isEmpty(post.metadata.annotations.get('thumbnail_mode'))? post.metadata.annotations.get('thumbnail_mode') : post.spec.pinned ? theme.config.post.top_thumbnail_mode : theme.config.post.thumbnail_mode}">
+            thumbnail_mode = ${(theme.config.post.top_thumbnail_mode == 'grid' || (!post.spec.pinned && theme.config.post.thumbnail_mode == 'grid'))? 'grid' : (!#strings.isEmpty(post.metadata.annotations.get('thumbnail_mode')) && post.metadata.annotations.get('thumbnail_mode') != 'none')? post.metadata.annotations.get('thumbnail_mode') : post.spec.pinned ? theme.config.post.top_thumbnail_mode : theme.config.post.thumbnail_mode}">
     <div th:if="${!#strings.isEmpty(thumbnail) && thumbnail_mode == 'back'}" class="card widget card-cover">
       <a th:href="${post.status.permalink}">
         <div class="cover-image" th:style="'background-image: url(' + ${thumbnail} + ')'"></div>