修改促销、优化页面布局

Change-Id: Iae813b5b6557efa7059fe6d94bc32e96c984e4ea
diff --git a/src/pages/SeedList/Recommend/PlaylistDetailPage.jsx b/src/pages/SeedList/Recommend/PlaylistDetailPage.jsx
index 07558d6..54380e1 100644
--- a/src/pages/SeedList/Recommend/PlaylistDetailPage.jsx
+++ b/src/pages/SeedList/Recommend/PlaylistDetailPage.jsx
@@ -72,7 +72,7 @@
       src={detail.coverUrl || '/default-cover.jpg'}
       alt={detail.title}
       onError={e => { e.target.src = '/default-cover.jpg'; }}
-      className="cover-image"
+      className="cover-img"
     />
     <p>{detail.description}</p>