作答，手机端，上一页按钮样式；

src/components/PfePagination.vue

@@ -1,9 +1,10 @@
 <template>
   <div v-if="isMobile" class="pagination-mob" wrapperClassName="spin">
     <!-- mob端 -->
-    <a-spin :spinning="prevLoading">
+    <a-spin v-show="showPrevious && page > min && page < pages"
+            :spinning="prevLoading"
+            wrapperClassName="spin prev-spin">
       <div
-        v-show="showPrevious && page > min && page < pages"
         class="pfe-button btn previous my-btn"
         @click="previous"
         :style="`color: ${buttonTextColor};background-color: ${buttonColor}`"
@@ -208,6 +209,10 @@ export default defineComponent({
     }
   }
 
+  .prev-spin {
+    margin-right: 20px;
+  }
+
   .btn {
     width: calc(50% - 30px);
     height: 44px;
@@ -227,7 +232,7 @@ export default defineComponent({
     color: #70b936;
     background-color: #fff;
     // border: 1px solid $yili-default-color;
-    margin-right: 20px;
+    //margin-right: 20px;
 
     .iconfont {
       margin-right: 8px;