Merge branch 'hqyDev' of http://git.dayaedu.com/liushengqiang/classroom-app into jenkins-test

src/views/creation/index.module.less

@@ -260,6 +260,9 @@
                 color: #ffffff;
             }
           }
+          .plyr__poster{
+            background-size: cover;
+          }
       }
     }
     .staff {
@@ -923,7 +926,7 @@
       height: 32px;
     }
     .musicDetail{
-      margin-left: 20px;
+      margin-left: 8px;
       .musicSheetName{
         width: 300px;
         margin-top: 4px;