style(business): 优化货物导入区域样式

- 为货物导入部分添加卡片式容器div
- 新增cargo-import-card样式，包含白色背景和圆角
- 添加内边距和阴影效果，提升视觉层次感
- 调整cargo-import区域的padding为0，确保样式一致性

src/views/business/components/business-crud-page.vue

@@ -4998,6 +4998,7 @@
       @closed="cargoImportRows = []"
     >
       <div class="business-crud-page__cargo-import">
+        <div class="business-crud-page__cargo-import-card">
         <el-upload
           action="#"
           accept=".xls,.xlsx"
@@ -5013,6 +5014,7 @@
         </el-upload>
         <el-button type="primary" @click="handleCargoImportTemplate">点击下载模板</el-button>
         </div>
+      </div>
       <template #footer>
         <el-button :disabled="cargoImportLoading" @click="closeCargoImportDialog">关闭</el-button>
         <el-button
@@ -13249,6 +13251,18 @@ export default {
     }
   }
 
+  &__cargo-import {
+    padding: 0 !important;
+  }
+
+  &__cargo-import-card {
+    background: #fff;
+    border-radius: 6px;
+    padding: 24px;
+    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.06);
+    width: 90%;
+  }
+
   &__cargo-table {
     width: 100%;
     min-width: 0;