Merge branch 'dev' of http://git.dayaedu.com/huangqiyong/classroom

src/views/coursewarePlay/coursewarePlay.vue

@@ -510,6 +510,10 @@ function handlePracticeClose() {
          }
       }
       .midMenu {
+         position: absolute;
+         left: 50%;
+         top: 50%;
+         transform: translate(-50%, -50%);
          font-weight: 500;
          font-size: 20px;
          color: #ffffff;