diff --git a/app/src/main/assets/h5/js/pages/home.js b/app/src/main/assets/h5/js/pages/home.js
index df2a865..676d39e 100644
--- a/app/src/main/assets/h5/js/pages/home.js
+++ b/app/src/main/assets/h5/js/pages/home.js
@@ -318,6 +318,7 @@ function switchMedia(delta) {
   setTimeout(() => {
     if (!old.isConnected) return;
     const fresh = renderMediaCard(info);
+    fresh.classList.add('span-2'); // 保持跨两栏（renderMediaCard 自身不带 span 类）
     fresh.classList.add(inClass);
     old.replaceWith(fresh);
   }, 180);