diff --git a/.trellis/spec/frontend/components.md b/.trellis/spec/frontend/components.md
index 84bcb7c..45bc9f0 100644
--- a/.trellis/spec/frontend/components.md
+++ b/.trellis/spec/frontend/components.md
@@ -155,8 +155,13 @@ The project Dialog adapter must:
 - Override Kumo minimum width so mobile dialogs stay inside `100vw`.
 - Keep `transform: none` and `translate: 0 0` on `.teatea-dialog`; use
   opacity/scale-only motion if animation is needed.
+- Kumo may inject `-translate-x-1/2 -translate-y-1/2` before project classes in the
+  runtime class list. Do not rely only on Tailwind class order or a plain CSS rule;
+  the Dialog adapter should enforce `style={{ transform: "none", translate: "0 0" }}`
+  or an equally strong adapter-owned override.
 - Browser validation should assert the panel center is within 2px of the viewport center
-  on desktop and mobile.
+  on desktop and mobile and should inspect computed `translate` when a dialog is visibly
+  offset.
 
 ### Static Module Data Contract
 
diff --git a/app/(app)/app/settings/global/page.tsx b/app/(app)/app/settings/global/page.tsx
index e43aecc..34f618f 100644
--- a/app/(app)/app/settings/global/page.tsx
+++ b/app/(app)/app/settings/global/page.tsx
@@ -17,10 +17,11 @@ export default async function GlobalSettingsPage(): Promise<React.ReactElement>
   }
 
   const settings = await getSystemSettings();
+  const organizationSettingsHref = getWorkspaceHref(context.organization?.slug, "/settings/organizations");
 
   return (
     <div className="flex flex-col gap-5">
-      <GlobalSettingsClient settings={settings} />
+      <GlobalSettingsClient organizationSettingsHref={organizationSettingsHref} settings={settings} />
     </div>
   );
 }
diff --git a/components/ui/dialog.tsx b/components/ui/dialog.tsx
index 97b082b..5006e56 100644
--- a/components/ui/dialog.tsx
+++ b/components/ui/dialog.tsx
@@ -40,12 +40,13 @@ export function Dialog({
     >
       <KumoDialog
         className={cn(
-          "teatea-dialog fixed inset-0 z-50 m-auto flex h-fit max-h-[min(calc(100svh-1.5rem),52rem)] w-[min(calc(100vw-1.5rem),48rem)] min-w-0 flex-col overflow-hidden rounded-lg border border-kumo-line bg-kumo-base p-0 shadow-xl outline-none ring-1 ring-kumo-line",
+          "teatea-dialog fixed inset-0 z-50 m-auto flex h-fit max-h-[min(calc(100svh-1.5rem),52rem)] w-[min(calc(100vw-1.5rem),42rem)] min-w-0 flex-col overflow-hidden rounded-lg border border-kumo-line bg-kumo-base p-0 shadow-xl outline-none ring-1 ring-kumo-line",
           "data-ending-style:scale-95 data-ending-style:opacity-0 data-starting-style:scale-95 data-starting-style:opacity-0",
           className,
         )}
         data-kumo-backdrop-classes={kumoBackdropClassNames}
         size="xl"
+        style={{ transform: "none", translate: "0 0" }}
       >
         <header className="flex shrink-0 items-start justify-between gap-4 border-b border-kumo-line bg-kumo-base p-5">
           <div className="min-w-0">
diff --git a/modules/settings/components/GlobalSettingsClient.tsx b/modules/settings/components/GlobalSettingsClient.tsx
index 277b305..deaf8b9 100644
--- a/modules/settings/components/GlobalSettingsClient.tsx
+++ b/modules/settings/components/GlobalSettingsClient.tsx
@@ -1,11 +1,11 @@
 "use client";
 
 import { FormEvent, useState } from "react";
-import { Globe2, Save, ShieldCheck } from "lucide-react";
+import { Building2, Globe2, KeyRound, Save, ShieldCheck, UserPlus } from "lucide-react";
 import { useRouter } from "next/navigation";
 
 import { Badge } from "@/components/ui/badge";
-import { Button } from "@/components/ui/button";
+import { Button, LinkButton } from "@/components/ui/button";
 import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card";
 import { Checkbox } from "@/components/ui/checkbox";
 import { Input } from "@/components/ui/input";
@@ -13,17 +13,22 @@ import type { ApiResult } from "@/modules/core/server/api";
 import type { SystemSettings } from "@/modules/core/types";
 
 type GlobalSettingsClientProps = {
+  organizationSettingsHref: string;
   settings: SystemSettings;
 };
 
-type SettingsTab = "registration" | "oidc";
+type SettingsTab = "registration" | "invitation" | "oidc";
 
 const tabs: Array<{ label: string; value: SettingsTab }> = [
   { label: "注册入口", value: "registration" },
+  { label: "邀请注册", value: "invitation" },
   { label: "OIDC 默认配置", value: "oidc" },
 ];
 
-export function GlobalSettingsClient({ settings }: GlobalSettingsClientProps): React.ReactElement {
+export function GlobalSettingsClient({
+  organizationSettingsHref,
+  settings,
+}: GlobalSettingsClientProps): React.ReactElement {
   const router = useRouter();
   const [activeTab, setActiveTab] = useState<SettingsTab>("registration");
   const [registrationEnabled, setRegistrationEnabled] = useState(settings.registrationEnabled);
@@ -135,6 +140,58 @@ export function GlobalSettingsClient({ settings }: GlobalSettingsClientProps): R
             </div>
           </CardContent>
         </div>
+        <div hidden={activeTab !== "invitation"} role="tabpanel">
+          <CardHeader>
+            <div className="flex items-center gap-2">
+              <KeyRound className="size-5 text-primary" aria-hidden="true" />
+              <CardTitle>邀请码与加入方式</CardTitle>
+            </div>
+            <CardDescription>集中说明公开注册、机构邀请和加入申请的关系，邀请码在机构管理中生成。</CardDescription>
+          </CardHeader>
+          <CardContent className="grid gap-4">
+            <div className="grid gap-3 lg:grid-cols-3">
+              <section className="rounded-md border p-3">
+                <div className="flex items-center gap-2">
+                  <Globe2 className="size-4 text-primary" aria-hidden="true" />
+                  <h3 className="text-sm font-semibold">公开注册</h3>
+                </div>
+                <p className="mt-2 text-sm text-muted-foreground">
+                  {registrationEnabled
+                    ? "访客可以从注册页创建账号，并选择申请加入开放注册的机构。"
+                    : "普通注册入口关闭；用户需要通过邀请链接或管理员创建账号。"}
+                </p>
+              </section>
+              <section className="rounded-md border p-3">
+                <div className="flex items-center gap-2">
+                  <UserPlus className="size-4 text-primary" aria-hidden="true" />
+                  <h3 className="text-sm font-semibold">机构邀请</h3>
+                </div>
+                <p className="mt-2 text-sm text-muted-foreground">
+                  邀请链接格式为 `/register?invite=...`，可限定邮箱并指定入组角色，适合定向开通账号。
+                </p>
+              </section>
+              <section className="rounded-md border p-3">
+                <div className="flex items-center gap-2">
+                  <Building2 className="size-4 text-primary" aria-hidden="true" />
+                  <h3 className="text-sm font-semibold">加入审批</h3>
+                </div>
+                <p className="mt-2 text-sm text-muted-foreground">
+                  未持邀请码的用户申请加入机构后，需要管理员在用户管理中审批并分配角色。
+                </p>
+              </section>
+            </div>
+            <div className="flex flex-col gap-3 rounded-md border bg-secondary/25 p-3 sm:flex-row sm:items-center sm:justify-between">
+              <div className="min-w-0 text-sm">
+                <p className="font-medium">前往机构管理生成邀请码</p>
+                <p className="mt-1 text-muted-foreground">选择机构行内的“邀请”，生成一次性或邮箱限定的注册链接。</p>
+              </div>
+              <LinkButton href={organizationSettingsHref} variant="outline">
+                <UserPlus className="size-4" aria-hidden="true" />
+                管理机构邀请
+              </LinkButton>
+            </div>
+          </CardContent>
+        </div>
         <div hidden={activeTab !== "oidc"} role="tabpanel">
           <CardHeader>
             <div className="flex items-center gap-2">
diff --git a/modules/settings/components/OrganizationManagementClient.tsx b/modules/settings/components/OrganizationManagementClient.tsx
index bd0cb9c..9746811 100644
--- a/modules/settings/components/OrganizationManagementClient.tsx
+++ b/modules/settings/components/OrganizationManagementClient.tsx
@@ -166,7 +166,7 @@ export function OrganizationRowActions({
   }
 
   return (
-    <div className="flex items-center justify-end gap-2">
+    <div className="flex flex-wrap items-center justify-end gap-2">
       <Button onClick={() => setIsEditOpen(true)} size="sm" type="button" variant="outline">
         <Pencil className="size-4" aria-hidden="true" />
         编辑
@@ -195,6 +195,7 @@ export function OrganizationRowActions({
         </Button>
       )}
       <Dialog
+        className="max-w-lg"
         description="编辑机构名称、唯一标识和启停状态。"
         onClose={() => setIsEditOpen(false)}
         open={isEditOpen}
@@ -223,7 +224,7 @@ export function OrganizationRowActions({
               {message}
             </p>
           ) : null}
-          <div className="flex justify-end gap-2">
+          <div className="flex flex-col-reverse gap-2 sm:flex-row sm:justify-end">
             <Button onClick={() => setIsEditOpen(false)} type="button" variant="outline">
               取消
             </Button>
diff --git a/modules/settings/components/RoleManagementClient.tsx b/modules/settings/components/RoleManagementClient.tsx
index bd8efbe..a151a8b 100644
--- a/modules/settings/components/RoleManagementClient.tsx
+++ b/modules/settings/components/RoleManagementClient.tsx
@@ -204,7 +204,7 @@ export function RoleManagementClient({ permissions }: RoleManagementClientProps)
         新增角色
       </Button>
       <Dialog
-        className="max-w-5xl"
+        className="w-[min(calc(100vw-1.5rem),64rem)]"
         description="角色由系统注册权限点组合而成。"
         onClose={closeCreateDialog}
         open={isCreateOpen}
@@ -345,7 +345,7 @@ export function RoleRowActions({ permissions, role }: RoleRowActionsProps): Reac
         </Button>
       )}
       <Dialog
-        className="max-w-5xl"
+        className="w-[min(calc(100vw-1.5rem),64rem)]"
         description="编辑自定义角色的名称、说明、状态和权限点。"
         onClose={closeEditDialog}
         open={isEditOpen}