fix(code): 修正代码错误及不严谨的地方

pages_tool/cases/index.vue

@@ -3,7 +3,7 @@
     <view class="about w100">
       <view class="list_cotact padding-top">
         <view class="container">
-          <block v-for="(item, index) in dataList" :key="index">
+          <block v-for="(item, index) in dataList" :key="item.case_id || index">
             <view class="view_ul_100" style="margin-bottom:30rpx;">
               <view class="bl clearfix bor bg-white">
                 <block v-if="item.$orig.case_type === 0">
@@ -312,7 +312,7 @@ export default {
 };
 </script>
 
-<style scoped>
+<style lang="scss" scoped>
 .item {
   display: flex;
   padding: 30rpx 0;