style(index): 调整首页头部样式间距

移除多余的 padding 并统一使用水平间距

 <!--
  * @Date: 2025-06-28 10:33:00
  * @LastEditors: hookehuyr hookehuyr@gmail.com
- * @LastEditTime: 2025-07-15 15:45:21
+ * @LastEditTime: 2025-07-15 15:58:51
  * @FilePath: /jgdl/src/pages/index/index.vue
  * @Description: 捡个电驴首页
 -->
@@ -9,7 +9,7 @@
   <view class="flex flex-col bg-orange-50 min-h-screen" style="background-color: #f6f6f6;">
     <!-- Header -->
     <nut-sticky>
-      <view class="bg-orange-400 p-4 pt-4 pb-4">
+      <view class="bg-orange-400 px-4">
         <nut-row type="flex" justify="center" align="center">
           <nut-col span="6">
             <view class="text-xl font-bold text-white">捡个电驴</view>