reformat: 深度选择器写法换为:deep()，样式微调，添加node版本说明

README.md

@@ -1,6 +1,6 @@
 # seek-bok-frontend
 
-- [npm版本6.14.15](https://nodejs.org/zh-cn/download/releases/)
+- [node版本14.18.* —— npm版本6.14.15](https://nodejs.org/zh-cn/download/releases/)
 
 ## Project setup
 ```

src/components/QuestionCreator/SingleQuestionCreator.vue

@@ -263,11 +263,11 @@ export default {
   margin-bottom: 10px;
 }
 
-/deep/ .el-input-group__prepend {
+:deep(.el-input-group__prepend) {
   width: 20px;
 }
 
-/deep/ .el-cascader{
+:deep(.el-cascader) {
   width: 100%;
 }
 </style>

src/views/Bok/Main/Operation.vue

@@ -1,6 +1,6 @@
 <template>
   <h1>This is Operation Page!</h1>
-  <el-tabs v-model="activeName" @tab-click="handleClick">
+  <el-tabs v-model="activeName" @tab-click="handleClick" stretch>
     <el-tab-pane label="新建题目" name="create">
       <div>新建题目</div>
       <single-question-creator id="single-question-creator"/>
@@ -100,4 +100,5 @@ export default {
 #single-question-creator{
   padding: 20px 20px 20px 0px;
 }
+
 </style>

src/views/Bok/Main/Search/index.vue

@@ -340,15 +340,15 @@ export default {
     margin-right: 14px;
   }
 }
-::v-deep .el-collapse-item__content {
+:deep(.el-collapse-item__content) {
     padding: 0;
 }
 
-::v-deep .el-collapse-item__arrow {
+:deep(.el-collapse-item__arrow) {
     margin: 4px 12px 4px 12px;
 }
 
-::v-deep .el-collapse-item__header {
+:deep(.el-collapse-item__header) {
     /*color: $blue;*/
     /*height: 40px;*/
     display: flex;