diff --git a/backend/app/commands/seed/seed.go b/backend/app/commands/seed/seed.go
index 190e92b..964e534 100644
--- a/backend/app/commands/seed/seed.go
+++ b/backend/app/commands/seed/seed.go
@@ -67,7 +67,6 @@ func Serve(cmd *cobra.Command, args []string) error {
 		}
 
 		// Buyer
-
 		buyer := &models.User{
 			Username: "test",
 			Phone:    "13800138000",
@@ -82,8 +81,22 @@ func Serve(cmd *cobra.Command, args []string) error {
 			buyer, _ = models.UserQuery.WithContext(ctx).Where(models.UserQuery.Phone.Eq("13800138000")).First()
 		}
 
-		// 2. Tenant
+		// Superadmin
+		superAdmin := &models.User{
+			Username: "superadmin",
+			Phone:    "13800009999",
+			Nickname: "平台管理员",
+			Avatar:   "https://api.dicebear.com/7.x/avataaars/svg?seed=Admin",
+			Balance:  0,
+			Status:   consts.UserStatusVerified,
+			Roles:    types.Array[consts.Role]{consts.RoleSuperAdmin},
+		}
+		if err := models.UserQuery.WithContext(ctx).Create(superAdmin); err != nil {
+			fmt.Printf("Create superadmin failed: %v\n", err)
+			superAdmin, _ = models.UserQuery.WithContext(ctx).Where(models.UserQuery.Username.Eq("superadmin")).First()
+		}
 
+		// 2. Tenant
 		tenant := &models.Tenant{
 			UserID: creator.ID,
 			Name:   "梅派艺术工作室",
@@ -96,6 +109,17 @@ func Serve(cmd *cobra.Command, args []string) error {
 			tenant, _ = models.TenantQuery.WithContext(ctx).Where(models.TenantQuery.UserID.Eq(creator.ID)).First()
 		}
 
+		// Tenant membership (buyer joins as member)
+		member := &models.TenantUser{
+			TenantID: tenant.ID,
+			UserID:   buyer.ID,
+			Role:     types.Array[consts.TenantUserRole]{consts.TenantUserRoleMember},
+			Status:   consts.UserStatusVerified,
+		}
+		if err := models.TenantUserQuery.WithContext(ctx).Create(member); err != nil {
+			fmt.Printf("Create tenant member failed: %v\n", err)
+		}
+
 		// 3. Contents
 		titles := []string{
 			"《锁麟囊》春秋亭 (程砚秋)", "昆曲《牡丹亭》游园惊梦", "越剧《红楼梦》葬花",
@@ -109,6 +133,7 @@ func Serve(cmd *cobra.Command, args []string) error {
 			"https://images.unsplash.com/photo-1469571486292-0ba58a3f068b?ixlib=rb-1.2.1&auto=format&fit=crop&w=400&q=60",
 		}
 
+		var seededContents []*models.Content
 		for i, title := range titles {
 			price := int64((i % 3) * 1000) // 0, 10.00, 20.00
 			if i == 3 {
@@ -126,7 +151,9 @@ func Serve(cmd *cobra.Command, args []string) error {
 				Views:       int32(rand.Intn(10000)),
 				Likes:       int32(rand.Intn(1000)),
 			}
-			models.ContentQuery.WithContext(ctx).Create(c)
+			if err := models.ContentQuery.WithContext(ctx).Create(c); err == nil {
+				seededContents = append(seededContents, c)
+			}
 			// Price
 			models.ContentPriceQuery.WithContext(ctx).Create(&models.ContentPrice{
 				TenantID:    tenant.ID,
@@ -163,30 +190,142 @@ func Serve(cmd *cobra.Command, args []string) error {
 		cp1 := &models.Coupon{
 			TenantID:       tenant.ID,
 			Title:          "新人立减券",
-			Type:           "fix_amount",
+			Type:           consts.CouponTypeFixAmount,
 			Value:          500, // 5.00
 			MinOrderAmount: 1000,
 			TotalQuantity:  100,
 			StartAt:        time.Now().Add(-24 * time.Hour),
 			EndAt:          time.Now().Add(30 * 24 * time.Hour),
 		}
-		models.CouponQuery.WithContext(ctx).Create(cp1)
+		if err := models.CouponQuery.WithContext(ctx).Create(cp1); err != nil {
+			fmt.Printf("Create coupon failed: %v\n", err)
+		}
 
 		// Give to buyer
 		models.UserCouponQuery.WithContext(ctx).Create(&models.UserCoupon{
 			UserID:   buyer.ID,
 			CouponID: cp1.ID,
-			Status:   "unused",
+			Status:   consts.UserCouponStatusUnused,
 		})
 
-		// 5. Notifications
-		models.NotificationQuery.WithContext(ctx).Create(&models.Notification{
-			UserID:  buyer.ID,
-			Type:    "system",
-			Title:   "欢迎注册",
-			Content: "欢迎来到曲韵平台！",
-			IsRead:  false,
+		// 5. Orders & library access (first content)
+		if len(seededContents) > 0 {
+			content := seededContents[0]
+			order := &models.Order{
+				TenantID:       tenant.ID,
+				UserID:         buyer.ID,
+				Type:           consts.OrderTypeContentPurchase,
+				Status:         consts.OrderStatusPaid,
+				Currency:       consts.CurrencyCNY,
+				AmountOriginal: 990,
+				AmountDiscount: 0,
+				AmountPaid:     990,
+				IdempotencyKey: uuid.NewString(),
+				PaidAt:         time.Now().Add(-2 * time.Hour),
+			}
+			if err := models.OrderQuery.WithContext(ctx).Create(order); err != nil {
+				fmt.Printf("Create order failed: %v\n", err)
+			} else {
+				models.OrderItemQuery.WithContext(ctx).Create(&models.OrderItem{
+					TenantID:      tenant.ID,
+					UserID:        buyer.ID,
+					OrderID:       order.ID,
+					ContentID:     content.ID,
+					ContentUserID: creator.ID,
+					AmountPaid:    order.AmountPaid,
+				})
+				models.ContentAccessQuery.WithContext(ctx).Create(&models.ContentAccess{
+					TenantID:  tenant.ID,
+					UserID:    buyer.ID,
+					ContentID: content.ID,
+					OrderID:   order.ID,
+					Status:    consts.ContentAccessStatusActive,
+				})
+			}
+		}
+
+		// 6. Creator join request & invite
+		models.TenantJoinRequestQuery.WithContext(ctx).Create(&models.TenantJoinRequest{
+			TenantID: tenant.ID,
+			UserID:   buyer.ID,
+			Status:   "pending",
+			Reason:   "申请加入租户用于创作",
 		})
+		models.TenantInviteQuery.WithContext(ctx).Create(&models.TenantInvite{
+			TenantID:  tenant.ID,
+			UserID:    creator.ID,
+			Code:      "invite" + cast.ToString(rand.Intn(100000)),
+			Status:    "active",
+			MaxUses:   5,
+			UsedCount: 0,
+			Remark:    "staging seed invite",
+			ExpiresAt: time.Now().Add(7 * 24 * time.Hour),
+		})
+
+		// 7. Notifications & templates
+		models.NotificationQuery.WithContext(ctx).Create(&models.Notification{
+			UserID:   buyer.ID,
+			TenantID: tenant.ID,
+			Type:     string(consts.NotificationTypeSystem),
+			Title:    "欢迎注册",
+			Content:  "欢迎来到曲韵平台！",
+			IsRead:   false,
+		})
+		models.NotificationTemplateQuery.WithContext(ctx).Create(&models.NotificationTemplate{
+			TenantID: 0,
+			Name:     "订单支付通知",
+			Type:     consts.NotificationTypeOrder,
+			Title:    "订单支付成功",
+			Content:  "您的订单已支付成功。",
+			IsActive: true,
+		})
+		models.NotificationTemplateQuery.WithContext(ctx).Create(&models.NotificationTemplate{
+			TenantID: 0,
+			Name:     "内容审核通知",
+			Type:     consts.NotificationTypeAudit,
+			Title:    "内容审核通过",
+			Content:  "您提交的内容已通过审核。",
+			IsActive: true,
+		})
+
+		// 8. System config
+		models.SystemConfigQuery.WithContext(ctx).Create(&models.SystemConfig{
+			ConfigKey:   "site_name",
+			Value:       types.JSON([]byte(`{"value":"曲韵平台"}`)),
+			Description: "站点名称",
+		})
+
+		// 9. Audit log
+		models.AuditLogQuery.WithContext(ctx).Create(&models.AuditLog{
+			TenantID:   tenant.ID,
+			OperatorID: superAdmin.ID,
+			Action:     "seed",
+			TargetID:   fmt.Sprintf("tenant:%d", tenant.ID),
+			Detail:     "staging seed data",
+		})
+
+		// 10. Content report
+		if len(seededContents) > 0 {
+			models.ContentReportQuery.WithContext(ctx).Create(&models.ContentReport{
+				TenantID:   tenant.ID,
+				ContentID:  seededContents[0].ID,
+				ReporterID: buyer.ID,
+				Reason:     "spam",
+				Detail:     "疑似广告内容",
+				Status:     "pending",
+			})
+		}
+
+		// 11. Comments
+		if len(seededContents) > 0 {
+			models.CommentQuery.WithContext(ctx).Create(&models.Comment{
+				TenantID:  tenant.ID,
+				UserID:    buyer.ID,
+				ContentID: seededContents[0].ID,
+				Content:   "好喜欢这段演出！",
+				Likes:     1,
+			})
+		}
 
 		fmt.Println("Seed done.")
 		return nil
diff --git a/docs/plan.md b/docs/plan.md
index e69de29..cd2ab2e 100644
--- a/docs/plan.md
+++ b/docs/plan.md
@@ -0,0 +1,92 @@
+# Implementation Plan: Staging Seed Data
+
+**Branch**: `main` | **Date**: 2026-01-26 | **Spec**: `docs/staging_smoke_test.md`
+**Input**: staging 冒烟测试需要快速准备基础数据。
+
+**Note**: 本计划遵循 `docs/templates/plan-template.md`。
+
+## Summary
+
+扩展 Go seed 命令，生成 staging 冒烟测试所需的最小数据集（租户、用户、超管、内容、订单、优惠券、通知等），确保前后台关键页面可快速验证。
+
+## Technical Context
+
+**Language/Version**: Go 1.22
+**Primary Dependencies**: Fiber, GORM-Gen
+**Storage**: PostgreSQL + Redis
+**Testing**: `go test ./...`
+**Target Platform**: Linux server (staging)
+**Project Type**: Web application (backend + frontend)
+**Performance Goals**: N/A
+**Constraints**: 不修改生成文件，Service/Controller 规范保持不变
+**Scale/Scope**: 最小可用冒烟数据
+
+## Constitution Check
+
+- 遵循 `backend/llm.txt` 规则（不改生成文件、中文注释、服务层规范）。
+- seed 逻辑仅在 `backend/app/commands/seed/seed.go` 修改。
+
+## Project Structure
+
+### Documentation (this feature)
+
+```text
+docs/
+└── plan.md
+```
+
+### Source Code (repository root)
+
+```text
+backend/
+└── app/commands/seed/seed.go
+```
+
+**Structure Decision**: 使用现有 seed 命令注入 staging 数据。
+
+## Plan Phases
+
+### Phase 1: 数据范围确认
+- 明确需覆盖的冒烟用例与最小数据集。
+
+### Phase 2: Seed 扩展实现
+- 增加超管用户、租户成员、订单与内容访问等基础数据。
+- 确保幂等运行（重复执行不报错）。
+
+### Phase 3: 文档与验证
+- 记录 seed 运行方式与输出数据说明。
+
+## Tasks
+
+**Format**: `[ID] [P?] [Story] Description`
+
+### Phase 1: Foundational
+- [x] T001 [US0] 明确冒烟必需数据项（用户/租户/内容/订单/通知）
+
+### Phase 2: Seed 扩展
+- [x] T010 [US1] 创建超管用户与角色
+- [x] T011 [US1] 创建租户成员与权限关系
+- [x] T012 [US1] 创建订单、订单项、内容访问记录
+- [x] T013 [US1] 创建通知模板/系统通知
+
+### Phase 3: Docs
+- [x] T020 [US2] 更新 seed 说明文档/输出示例
+
+## Dependencies
+
+- Phase 1 → Phase 2 → Phase 3。
+
+## Acceptance Criteria
+
+- `go run ./backend/main.go seed` 可成功生成数据。
+- seed 后 staging 冒烟清单主要页面可打开并有数据展示。
+- 重复运行 seed 不产生致命错误。
+
+## Risks
+
+- 真实 staging 数据冲突（唯一索引）。
+- 订单/访问数据缺失导致部分页面空白。
+
+## Complexity Tracking
+
+无。
diff --git a/docs/staging_smoke_test.md b/docs/staging_smoke_test.md
index 75d3029..ed77ec7 100644
--- a/docs/staging_smoke_test.md
+++ b/docs/staging_smoke_test.md
@@ -9,6 +9,7 @@
 - Test user credentials (OTP or seeded user)
 - Superadmin credentials (role: `super_admin`)
 - Storage bucket configured for staging
+- Seed data loaded via `go run ./backend/main.go seed`
 
 ## Portal (Tenant)
 
@@ -94,6 +95,13 @@
 10. **Health**
     - Check health endpoints (service/storage status).
 
+## Seed Data Notes
+
+- Tenant: seed creates one tenant with code like `meipai_<rand>`.
+- Users: `creator` (creator role), `test` (regular user), `superadmin` (super admin).
+- Orders: one paid order with library access to first content.
+- Notifications, templates, audit log, system config, content report included.
+
 ## Pass/Fail Criteria
 
 - All pages load without 5xx/4xx errors (except expected auth errors).