diff --git a/.github/workflows/deploy-to-zhuyuan-server.yml b/.github/workflows/deploy-to-zhuyuan-server.yml
index 48b4c679..224a9b13 100644
--- a/.github/workflows/deploy-to-zhuyuan-server.yml
+++ b/.github/workflows/deploy-to-zhuyuan-server.yml
@@ -159,13 +159,14 @@ jobs:
             echo "✅ 主域名已注入: $ZY_DOMAIN_MAIN"
           else
             echo "⚠️ ZY_DOMAIN_MAIN 未配置，使用IP访问"
-            sed -i "s/ZY_DOMAIN_MAIN_PLACEHOLDER //g" /tmp/zhuyuan-sovereign.conf
+            sed -i "s/ZY_DOMAIN_MAIN_PLACEHOLDER//g" /tmp/zhuyuan-sovereign.conf
           fi
           if [ -n "$ZY_DOMAIN_PREVIEW" ]; then
             sed -i "s/ZY_DOMAIN_PREVIEW_PLACEHOLDER/$ZY_DOMAIN_PREVIEW/g" /tmp/zhuyuan-sovereign.conf
             echo "✅ 预览域名已注入: $ZY_DOMAIN_PREVIEW"
           else
-            echo "⚠️ ZY_DOMAIN_PREVIEW 未配置，预览站暂不启用域名"
+            echo "⚠️ ZY_DOMAIN_PREVIEW 未配置，预览站使用默认server_name"
+            # Nginx中 _ 是标准的catch-all server_name，不匹配任何实际域名
             sed -i "s/ZY_DOMAIN_PREVIEW_PLACEHOLDER/_/g" /tmp/zhuyuan-sovereign.conf
           fi
           scp -i ~/.ssh/zy_key \