背景设置->选择图片按钮增加样式

src/views/book/courseware/create/components/SetBackground.vue

@@ -54,7 +54,7 @@
                 :limit="1"
                 :http-request="uploadFile"
               >
-                <span style="cursor: pointer">选择图片</span>
+                <span class="select-button">选择图片</span>
               </el-upload>
               <div>
                 <span class="opacity-icon"></span>
@@ -848,6 +848,13 @@ export default {
             vertical-align: middle;
             background: url('@/assets/icon/opacity.png');
           }
+
+          .select-button {
+            color: #165dff;
+            cursor: pointer;
+            background-color: #fff;
+            box-shadow: 0 0 0 3px #fff;
+          }
         }
 
         .mode-list {