优化Banner 左侧，热门文章 热门文章 实用教程 选项样式问题

templates/modules/widgets/banner-group.html

@@ -177,7 +177,10 @@
                     <span class="categoryButtonText">[[${groups[2].title}]]</span><i th:class="${groups[2].icon}"></i>
                 </a>
             </div>
-            <style>
+        </th:block>
+    </div>
+
+    <style th:if="${not #lists.isEmpty(theme.config.top.BannerLeft.categoryGroup)}" th:with="groups = ${theme.config.top.BannerLeft.categoryGroup}">
         a.categoryButton.bikan {
             background: linear-gradient(to right, [[${groups[0].colorOneLight}]], [[${groups[0].colorTwoLight}]]);
             background-size: 200%;
@@ -208,8 +211,6 @@
             background-size: 200%;
         }
     </style>
-        </th:block>
-    </div>
 
     <script th:inline="javascript">