修改促销、优化页面布局

Change-Id: Iae813b5b6557efa7059fe6d94bc32e96c984e4ea
diff --git a/src/pages/SeedList/Recommend/PlaylistDetailPage.css b/src/pages/SeedList/Recommend/PlaylistDetailPage.css
index 78e7068..f9c09e6 100644
--- a/src/pages/SeedList/Recommend/PlaylistDetailPage.css
+++ b/src/pages/SeedList/Recommend/PlaylistDetailPage.css
@@ -12,7 +12,7 @@
   font-weight: 700;
 }
 
-.cover-image {
+.cover-img {
   width: 100%;
   max-height: 400px;
   object-fit: cover;