style(authCar): 调整弹窗位置和底部按钮内边距

将认证费用说明弹窗位置从右侧改为底部，并增加底部按钮区域的上边距以改善视觉效果

@@ -438,7 +438,7 @@
 
 /* 底部按钮区域 */
 .popup-footer {
-  padding: 24rpx 32rpx;
+  padding: 42rpx 32rpx;
   border-top: 1rpx solid #f3f4f6;
   background-color: #ffffff;
   display: flex;

 <!--
  * @Date: 2022-09-19 14:11:06
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-08-04 10:21:56
+ * @LastEditTime: 2025-08-04 10:30:09
  * @FilePath: /jgdl/src/pages/authCar/index.vue
  * @Description: 认证车源
 -->
@@ -88,7 +88,7 @@
     <!-- 认证费用说明弹窗 -->
     <nut-popup
       v-model:visible="showAuthInfoPopup"
-      position="right"
+      position="bottom"
       :style="{ width: '100%', height: '100%' }"
       closeable
       close-icon-position="top-right"