更新

src/views/coursewarePlay/components/courseCollapse/courseCollapse.vue

@@ -204,7 +204,7 @@ function handleClick(value: any) {
                   background: url("@/img/coursewarePlay/IMG.png") no-repeat;
                   background-size: 100% 100%;
                }
-               &.SONG.imgIcon {
+               &.SONG .imgIcon {
                   background: url("@/img/coursewarePlay/SONG.png") no-repeat;
                   background-size: 100% 100%;
                }
@@ -238,7 +238,7 @@ function handleClick(value: any) {
                background: url("@/img/coursewarePlay/IMG1.png") no-repeat;
                background-size: 100% 100%;
             }
-            &.SONG.imgIcon {
+            &.SONG .imgIcon {
                background: url("@/img/coursewarePlay/SONG1.png") no-repeat;
                background-size: 100% 100%;
             }