课文预览去掉背景色

src/views/book/courseware/preview/components/article/index.vue

@@ -803,7 +803,6 @@ export default {
 
     .ArticleView-body {
       box-sizing: border-box;
-      background: #fff;
       border: 1px solid rgba(0, 0, 0, 10%);
       border-radius: 8px;
 

src/views/book/courseware/preview/components/dialogue_article/index.vue

@@ -796,7 +796,6 @@ export default {
 
     .ArticleView-body {
       box-sizing: border-box;
-      background: #fff;
       border: 1px solid rgba(0, 0, 0, 10%);
       border-radius: 4px;