diff --git a/server-rs/crates/api-server/src/runtime_profile.rs b/server-rs/crates/api-server/src/runtime_profile.rs
index 3627ab371..287cae8a6 100644
--- a/server-rs/crates/api-server/src/runtime_profile.rs
+++ b/server-rs/crates/api-server/src/runtime_profile.rs
@@ -1511,6 +1511,8 @@ fn is_runtime_profile_domain_error(message: &str) -> bool {
 fn is_runtime_profile_membership_domain_error(message: &str) -> bool {
     message.starts_with("会员升级被拒绝: ")
         || message.starts_with("会员档位")
+        || message.starts_with("会员商品 product_id 无法解析: ")
+        || message.starts_with("充值商品类型无效：会员商品已迁移到会员档位目录")
         || matches!(
             message,
             "当前不是会员，请直接选择套餐购买"
@@ -2610,6 +2612,24 @@ mod tests {
         );
     }
 
+    #[test]
+    fn membership_business_rejections_map_to_bad_request() {
+        // 中文注释：会员商品迁档位目录后的业务拒绝必须按 400 返回；漏掉前缀匹配会落到 502，
+        // 让后台与下单端把可读的业务提示当成基础设施故障。目录缺行属于部署配置错误，保持 502。
+        for message in [
+            "会员升级被拒绝: cycle_kind_change_unsupported",
+            "会员商品 product_id 无法解析: membership-pro-yearly",
+            "充值商品类型无效：会员商品已迁移到会员档位目录",
+        ] {
+            let error = map_runtime_profile_client_error(SpacetimeClientError::Procedure(
+                message.to_string(),
+            ));
+
+            assert_eq!(error.status_code(), StatusCode::BAD_REQUEST, "{message}");
+            assert_eq!(error.message(), message);
+        }
+    }
+
     #[test]
     fn admin_profile_code_time_parser_accepts_optional_rfc3339_values() {
         assert_eq!(