问卷导言输入框自适应

src/views/question-naire/question-list.vue

@@ -255,7 +255,7 @@
             v-model="questionEditList.questionIntro"
             maxlength="210"
             placeholder="最多210字符"
-            style="width: 500px;"
+            
           ></el-input>
         </el-form-item>
         <el-form-item