diff --git a/openspec/changes/tenant-brand/.openspec.yaml b/openspec/changes/archive/2026-10-11-tenant-brand/.openspec.yaml
similarity index 100%
rename from openspec/changes/tenant-brand/.openspec.yaml
rename to openspec/changes/archive/2026-10-11-tenant-brand/.openspec.yaml
diff --git a/openspec/changes/tenant-brand/design.md b/openspec/changes/archive/2026-10-11-tenant-brand/design.md
similarity index 100%
rename from openspec/changes/tenant-brand/design.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/design.md
diff --git a/openspec/changes/tenant-brand/proposal.md b/openspec/changes/archive/2026-10-11-tenant-brand/proposal.md
similarity index 100%
rename from openspec/changes/tenant-brand/proposal.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/proposal.md
diff --git a/openspec/changes/tenant-brand/specs/backend/tenants/spec.md b/openspec/changes/archive/2026-10-11-tenant-brand/specs/backend/tenants/spec.md
similarity index 100%
rename from openspec/changes/tenant-brand/specs/backend/tenants/spec.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/specs/backend/tenants/spec.md
diff --git a/openspec/changes/tenant-brand/specs/frontend/AD/layout/spec.md b/openspec/changes/archive/2026-10-11-tenant-brand/specs/frontend/AD/layout/spec.md
similarity index 100%
rename from openspec/changes/tenant-brand/specs/frontend/AD/layout/spec.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/specs/frontend/AD/layout/spec.md
diff --git a/openspec/changes/tenant-brand/specs/shared/api-contract/spec.md b/openspec/changes/archive/2026-10-11-tenant-brand/specs/shared/api-contract/spec.md
similarity index 100%
rename from openspec/changes/tenant-brand/specs/shared/api-contract/spec.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/specs/shared/api-contract/spec.md
diff --git a/openspec/changes/tenant-brand/specs/shared/data-model/spec.md b/openspec/changes/archive/2026-10-11-tenant-brand/specs/shared/data-model/spec.md
similarity index 100%
rename from openspec/changes/tenant-brand/specs/shared/data-model/spec.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/specs/shared/data-model/spec.md
diff --git a/openspec/changes/tenant-brand/tasks.md b/openspec/changes/archive/2026-10-11-tenant-brand/tasks.md
similarity index 100%
rename from openspec/changes/tenant-brand/tasks.md
rename to openspec/changes/archive/2026-10-11-tenant-brand/tasks.md
diff --git a/openspec/specs/backend/tenants/spec.md b/openspec/specs/backend/tenants/spec.md
index 9353a44..8bb3a87 100644
--- a/openspec/specs/backend/tenants/spec.md
+++ b/openspec/specs/backend/tenants/spec.md
@@ -26,3 +26,10 @@
 #### Scenario: 删除租户
 - **WHEN** 删除租户
 - **THEN** 其用户/角色/资源/组织/字典/日志一并清理
+
+### Requirement: 租户品牌维护
+系统 SHALL 支持管理员在新增/编辑租户时填写品牌名、Logo、主色、版权，并在租户详情/列表中返回。
+
+#### Scenario: 编辑租户品牌
+- **WHEN** 管理员编辑某租户的品牌字段
+- **THEN** 品牌字段保存并可查询
diff --git a/openspec/specs/frontend/AD/layout/spec.md b/openspec/specs/frontend/AD/layout/spec.md
index b85f091..7722e9f 100644
--- a/openspec/specs/frontend/AD/layout/spec.md
+++ b/openspec/specs/frontend/AD/layout/spec.md
@@ -74,6 +74,17 @@
 - **WHEN** 用户开启「固定底部」
 - **THEN** 版权条常驻视口底部；关闭时随内容滚动
 
+### Requirement: 租户品牌应用
+前端 SHALL 在登录后拉取当前租户品牌，并应用：主色覆盖默认主题色、Logo/品牌名显示于顶栏、版权显示于底部；字段为空时回退默认。
+
+#### Scenario: 应用租户品牌
+- **WHEN** 用户登录某租户
+- **THEN** 顶栏标题/Logo、主题色、底部版权按该租户品牌渲染
+
+#### Scenario: 缺省回退
+- **WHEN** 租户未配置某品牌字段
+- **THEN** 该字段回退为默认值（标题回退 name、主题色回退默认主色）
+
 ### Requirement: 布局设置持久化
 所有布局与主题设置 SHALL 持久化到 localStorage，刷新页面后保持。
 
diff --git a/openspec/specs/shared/api-contract/spec.md b/openspec/specs/shared/api-contract/spec.md
index 98bd928..0e2241f 100644
--- a/openspec/specs/shared/api-contract/spec.md
+++ b/openspec/specs/shared/api-contract/spec.md
@@ -96,3 +96,14 @@
 #### Scenario: 标记已读
 - **WHEN** 用户请求 POST /notices/:id/read
 - **THEN** 该通知对当前用户标记为已读
+
+### Requirement: 租户品牌接口
+系统 SHALL 提供 `GET /auth/brand`（仅登录态），返回当前租户品牌（name、brandName、logoUrl、themeColor、copyright）；tenant 的新增/编辑/列表接口 SHALL 支持品牌字段。
+
+#### Scenario: 拉取当前租户品牌
+- **WHEN** 已登录用户请求 GET /auth/brand
+- **THEN** 返回其所在租户的品牌字段（缺省为空）
+
+#### Scenario: 维护租户品牌
+- **WHEN** 管理员新增或编辑租户并填写品牌字段
+- **THEN** 品牌字段随 tenant 一并保存与返回
diff --git a/openspec/specs/shared/data-model/spec.md b/openspec/specs/shared/data-model/spec.md
index 41105bb..969036b 100644
--- a/openspec/specs/shared/data-model/spec.md
+++ b/openspec/specs/shared/data-model/spec.md
@@ -35,6 +35,13 @@
 - **WHEN** 用户阅读某通知
 - **THEN** 写入 notice_read 记录其 read_at
 
+### Requirement: 租户品牌字段
+tenant 实体 SHALL 新增可空品牌字段：`brand_name`（品牌显示名）、`logo_url`（Logo 地址）、`theme_color`（主色，如 #2E7FA3）、`copyright`（版权文案）；为空时前端回退默认值或 `name`。
+
+#### Scenario: 租户配置品牌
+- **WHEN** 管理员为租户填写品牌名/Logo/主色/版权
+- **THEN** 存入 tenant 对应字段，登录该租户后前端按此渲染
+
 ### Requirement: 资源类型与代码
 resource 实体 SHALL 通过 type 字段区分菜单(menu)、按钮(button)、接口(api)三种类型；「目录」由菜单节点是否拥有菜单子节点推导，不设独立类型。每个 resource SHALL 拥有租户内唯一的 code，作为关联键与权限标识。