style: 统一全站深色视觉

lib/pages/store/store_page.dart

@@ -151,8 +151,8 @@ class _ProductTile extends StatelessWidget {
       padding: const EdgeInsets.fromLTRB(14, 14, 12, 14),
       decoration: BoxDecoration(
         color: AppColors.card,
-        borderRadius: BorderRadius.circular(16),
-        border: Border.all(color: AppColors.gold.withValues(alpha: 0.26)),
+        borderRadius: BorderRadius.circular(AppDimens.cardRadius),
+        border: Border.all(color: AppColors.border),
       ),
       child: Row(
         children: [