视觉优化：为首页4大技术架构洞察文章分配专属现代中式科技抽象封面图

addons/official/view/web/official_home/index.html

@@ -849,9 +849,6 @@
             {if $idx < 4}
             <article class="nhc-article-card">
                 <a href="{:addon_url('official/web.official_journalism/details',[':pid'=>6,':sid'=>$art['official_category_id'],':id'=>$art['id']])}" class="nhc-article-card-thumb">
-                    {if !empty($art['image'])}
-                    <img src="{$art['image']}" alt="{$art['title']}" loading="lazy">
-                    {else/}
                     {php}
                         $cover_fallbacks = [
                             0 => '/assets/addons/official/images/articles/article_cache.svg',
@@ -859,10 +856,14 @@
                             2 => '/assets/addons/official/images/articles/article_xxl_job.svg',
                             3 => '/assets/addons/official/images/articles/article_redis_split.svg',
                         ];
-                        $cover_src = isset($cover_fallbacks[$idx]) ? $cover_fallbacks[$idx] : '/assets/addons/official/images/articles/article_microservice.svg';
+                        $img_val = !empty($art['image']) ? $art['image'] : '';
+                        if (empty($img_val) || strpos($img_val, 'article_microservice.svg') !== false) {
+                            $cover_src = isset($cover_fallbacks[$idx]) ? $cover_fallbacks[$idx] : '/assets/addons/official/images/articles/article_microservice.svg';
+                        } else {
+                            $cover_src = $img_val;
+                        }
                     {/php}
                     <img src="{$cover_src}" alt="{$art['title']}" loading="lazy" style="width: 100%; height: 100%; object-fit: cover;">
-                    {/if}
                 </a>
                 <div class="nhc-article-card-body">
                     <div class="nhc-article-meta">