解决ui包按钮不显示问题

src/views/book/courseware/preview/components/voice_matrix/components/AudioLine.vue

@@ -385,7 +385,8 @@ export default {
     .play {
       display: block;
       width: 16px;
-      font-size: 0;
+
+      // font-size: 0;
       cursor: pointer;
     }