diff --git a/core/frontend/src/App.tsx b/core/frontend/src/App.tsx
index dcd8f2e..a3f935a 100644
--- a/core/frontend/src/App.tsx
+++ b/core/frontend/src/App.tsx
@@ -560,7 +560,7 @@ export function App() {
         initialMode={authMode}
         onModeChange={(next) => {
           setAuthMode(next);
-          window.history.pushState(null, "", "/login");
+          window.history.pushState(null, "", next === "register" ? "/register" : "/login");
         }}
         onAuthed={onAuthed}
       />
diff --git a/core/frontend/src/api.ts b/core/frontend/src/api.ts
index f4c4bb5..637ed4e 100644
--- a/core/frontend/src/api.ts
+++ b/core/frontend/src/api.ts
@@ -6,6 +6,7 @@ import type {
   BillingTrend,
   Ledger,
   LoginSession,
+  Invitation,
   ModelConfig,
   Notification,
   NotificationList,
@@ -105,7 +106,7 @@ async function request<T>(path: string, options: RequestInit = {}): Promise<T> {
 }
 
 export const api = {
-  register(payload: { username: string; password: string; email?: string; team_name?: string }) {
+  register(payload: { username: string; password: string; email?: string; team_name?: string; invite_code?: string }) {
     return request<AuthPayload>("/api/auth/register/", { method: "POST", body: JSON.stringify(payload) });
   },
   login(payload: { username: string; password: string }) {
@@ -172,6 +173,15 @@ export const api = {
       body: JSON.stringify({ password })
     });
   },
+  listInvitations() {
+    return request<Invitation[]>("/api/auth/team/invitations/");
+  },
+  createInvitation(payload: { role?: string; email?: string; monthly_credit_limit?: number | string }) {
+    return request<Invitation>("/api/auth/team/invitations/", { method: "POST", body: JSON.stringify(payload) });
+  },
+  revokeInvitation(id: string) {
+    return request<Invitation>(`/api/auth/team/invitations/${id}/revoke/`, { method: "POST" });
+  },
   products() {
     return request<Paginated<Product>>("/api/products/");
   },
diff --git a/core/frontend/src/routes/auth-screen.tsx b/core/frontend/src/routes/auth-screen.tsx
index b386f9a..47d9a05 100644
--- a/core/frontend/src/routes/auth-screen.tsx
+++ b/core/frontend/src/routes/auth-screen.tsx
@@ -1,6 +1,18 @@
 import { useEffect, useRef, useState } from "react";
 import type { FormEvent } from "react";
-import { Eye, EyeOff, Info, LockKeyhole, UserRound } from "lucide-react";
+import {
+  ArrowRight,
+  Check,
+  Eye,
+  EyeOff,
+  Info,
+  LockKeyhole,
+  ScanLine,
+  ShieldCheck,
+  Ticket,
+  UserRound,
+  Users
+} from "lucide-react";
 import { api, getRemember, setRemember as persistRemember } from "../api";
 import type { Team, User } from "../types";
 import type { AuthMode } from "./route-config";
@@ -17,9 +29,24 @@ type FieldErrors = {
   password?: string;
 };
 
+type RegisterErrors = {
+  team?: string;
+  username?: string;
+  password?: string;
+  password2?: string;
+  agree?: string;
+};
+
+const VALUE_POINTS: { strong: string; rest: string }[] = [
+  { strong: "5 阶段流水线", rest: "脚本 → 资产 → 故事板 → 视频片段 → 拼接导出" },
+  { strong: "失败不扣费", rest: "任务仅在用户通过时扣费，失败 / 超时 / 重跑一律不扣" },
+  { strong: "团队 + 角色 + 四层额度", rest: "超管 / 团管 / 成员，日 / 月 + 团队 / 总四层防超支" },
+  { strong: "跨项目资产库", rest: "主播 / 场景 / 商品图沉淀复用，不重复生成" }
+];
+
 export function AuthScreen({
-  initialMode: _initialMode,
-  onModeChange: _onModeChange,
+  initialMode,
+  onModeChange,
   onAuthed
 }: {
   initialMode: AuthMode;
@@ -27,23 +54,37 @@ export function AuthScreen({
   onAuthed: (payload: { token: string; user: User; team: Team; remember?: boolean }) => void | Promise<void>;
 }) {
   const remembered = getRemember();
+  const [mode, setMode] = useState<AuthMode>(initialMode);
+
+  // ── 登录态 ──
   const [username, setUsername] = useState(remembered?.username || "");
   const [password, setPassword] = useState("");
   const [remember, setRemember] = useState(Boolean(remembered));
   const [showPwd, setShowPwd] = useState(false);
   const [fieldErrors, setFieldErrors] = useState<FieldErrors>({});
+
+  // ── 注册态 ──
+  const [regTeam, setRegTeam] = useState("");
+  const [regUsername, setRegUsername] = useState("");
+  const [regPassword, setRegPassword] = useState("");
+  const [regPassword2, setRegPassword2] = useState("");
+  const [regInvite, setRegInvite] = useState("");
+  const [regAgree, setRegAgree] = useState(true);
+  const [regShowPwd, setRegShowPwd] = useState(false);
+  const [regShowPwd2, setRegShowPwd2] = useState(false);
+  const [regErrors, setRegErrors] = useState<RegisterErrors>({});
+
+  // ── 共用 ──
   const [error, setError] = useState("");
   const [busy, setBusy] = useState(false);
   const [toast, setToast] = useState<{ title: string; sub: string } | null>(null);
   const [loginProgress, setLoginProgress] = useState<LoginProgress | null>(null);
   const toastTimer = useRef<ReturnType<typeof setTimeout> | null>(null);
 
+  // initialMode 由路由驱动(/login ↔ /register),外部回退/前进时跟随
   useEffect(() => {
-    const path = window.location.pathname.replace(/\/+$/, "").toLowerCase();
-    if (path === "/register" || window.location.hash === "#register") {
-      window.history.replaceState(null, "", "/login");
-    }
-  }, []);
+    setMode(initialMode);
+  }, [initialMode]);
   useEffect(() => () => { if (toastTimer.current) clearTimeout(toastTimer.current); }, []);
 
   function showToast(title: string, sub: string) {
@@ -52,6 +93,17 @@ export function AuthScreen({
     toastTimer.current = setTimeout(() => setToast(null), 2800);
   }
 
+  function switchMode(next: AuthMode) {
+    if (next === mode) return;
+    setMode(next);
+    setError("");
+    setLoginProgress(null);
+    setFieldErrors({});
+    setRegErrors({});
+    onModeChange(next);
+  }
+
+  // ── 登录 ──
   function setFieldValue(field: keyof FieldErrors, value: string) {
     if (field === "username") setUsername(value);
     if (field === "password") setPassword(value);
@@ -72,7 +124,7 @@ export function AuthScreen({
     return true;
   }
 
-  async function submit(event?: FormEvent) {
+  async function submitLogin(event?: FormEvent) {
     event?.preventDefault();
     if (busy) return;
     if (!validateLogin()) return;
@@ -98,22 +150,259 @@ export function AuthScreen({
     }
   }
 
+  // ── 注册 ──
+  function setRegValue(field: keyof RegisterErrors, value: string) {
+    if (field === "team") setRegTeam(value);
+    if (field === "username") setRegUsername(value);
+    if (field === "password") setRegPassword(value);
+    if (field === "password2") setRegPassword2(value);
+    setError("");
+    setRegErrors((current) => ({ ...current, [field]: undefined }));
+  }
+
+  function validateRegister() {
+    const next: RegisterErrors = {};
+    if (!regTeam.trim()) next.team = "请输入团队名";
+    if (!regUsername.trim()) next.username = "请输入用户名";
+    if (!regPassword) next.password = "请输入密码";
+    else if (regPassword.length < 8) next.password = "密码至少 8 位";
+    if (!regPassword2) next.password2 = "请再次输入密码";
+    else if (regPassword && regPassword2 !== regPassword) next.password2 = "两次密码不一致";
+    if (!regAgree) next.agree = "请阅读并同意用户协议";
+    setRegErrors(next);
+    if (Object.keys(next).length > 0) {
+      setError("请补全必填字段后再创建团队");
+      return false;
+    }
+    return true;
+  }
+
+  async function submitRegister(event?: FormEvent) {
+    event?.preventDefault();
+    if (busy) return;
+    if (!validateRegister()) return;
+    setBusy(true);
+    setError("");
+    setLoginProgress("entering");
+    try {
+      const invite = regInvite.trim();
+      const payload = await api.register({
+        username: regUsername.trim(),
+        password: regPassword,
+        team_name: regTeam.trim(),
+        ...(invite ? { invite_code: invite } : {})
+      });
+      // 注册即登录:记住新账号用户名,与登录一致地交给 onAuthed 完成身份+数据水合
+      persistRemember(regUsername.trim(), true);
+      await onAuthed({ ...payload, remember: true });
+    } catch (err) {
+      setLoginProgress(null);
+      const raw = err instanceof Error ? err.message : "";
+      const friendly = /already exists|unique|taken/i.test(raw)
+        ? "该用户名已被占用,换一个试试"
+        : /invite|invitation/i.test(raw)
+          ? "邀请码无效或已过期"
+          : raw || "创建团队失败,请稍后重试";
+      setError(friendly);
+    } finally {
+      setBusy(false);
+    }
+  }
+
+  const brand = (
+    <aside className="auth-brand">
+      <div className="logo"><img className="logo-img" src="/assets/logo-dark.png" alt="Airshelf" /></div>
+      <div className="tag">// SHORT-VIDEO COMMERCE PLATFORM</div>
+      {mode === "register" ? (
+        <>
+          <div className="hero hero-top">
+            <h1>开通团队，<br />开始 <span className="h">AI 带货</span> 第一条短剧</h1>
+            <p>个人 / 企业团队 1-2 小时出成片，失败不扣费，确认后扣。</p>
+          </div>
+          <div className="val-list">
+            {VALUE_POINTS.map((item) => (
+              <div className="val-item" key={item.strong}>
+                <span className="ic-v"><Check size={12} strokeWidth={2.2} aria-hidden="true" /></span>
+                <span className="txt-v"><b>{item.strong}</b> · {item.rest}</span>
+              </div>
+            ))}
+          </div>
+        </>
+      ) : (
+        <div className="hero">
+          <h1>AI 全流程<br /><span className="h">短剧化</span>带货生成</h1>
+          <p>商品 → AI 脚本 → 故事板 → Seedance 视频片段 → 一键导出 9:16 ≤60s 成片。</p>
+        </div>
+      )}
+      <div className="foot"><a href="#">关于</a><a href="#">定价</a><a href="#">联系</a><a href="#">隐私</a></div>
+    </aside>
+  );
+
+  if (mode === "register") {
+    return (
+      <main className="auth-exact-page auth-register-page">
+        <div className="auth-wrap">
+          <span className="corner-tr" aria-hidden="true"></span><span className="corner-bl" aria-hidden="true"></span>
+          {brand}
+          <section className="auth-form" aria-label="注册团队">
+            <div className="h-row"><h2>注册团队</h2><span className="sub">// /auth/register</span></div>
+            <p className="lead">填写团队信息开通账户，默认成为团队超管。</p>
+            <form id="register-form" autoComplete="off" onSubmit={submitRegister} noValidate>
+              <div className={`field${regErrors.team ? " has-error" : ""}`}>
+                <label className="field-label" htmlFor="reg-team">团队名 <span className="req">*</span></label>
+                <div className="field-input-wrap">
+                  <Users className="ic-l" size={16} strokeWidth={1.5} aria-hidden="true" />
+                  <input
+                    id="reg-team"
+                    type="text"
+                    placeholder="例: 小李的店 / XX 文化传媒"
+                    value={regTeam}
+                    aria-invalid={Boolean(regErrors.team)}
+                    onChange={(event) => setRegValue("team", event.target.value)}
+                  />
+                </div>
+              </div>
+
+              <div className={`field${regErrors.username ? " has-error" : ""}`}>
+                <label className="field-label" htmlFor="reg-username">用户名 <span className="req">*</span></label>
+                <div className="field-input-wrap">
+                  <UserRound className="ic-l" size={16} strokeWidth={1.5} aria-hidden="true" />
+                  <input
+                    id="reg-username"
+                    type="text"
+                    placeholder="登录用，建议字母 / 数字"
+                    value={regUsername}
+                    autoComplete="username"
+                    aria-invalid={Boolean(regErrors.username)}
+                    onChange={(event) => setRegValue("username", event.target.value)}
+                  />
+                </div>
+              </div>
+
+              <div className="field-row">
+                <div className={`field${regErrors.password ? " has-error" : ""}`}>
+                  <label className="field-label" htmlFor="reg-pwd">密码 <span className="req">*</span></label>
+                  <div className="field-input-wrap">
+                    <LockKeyhole className="ic-l" size={16} strokeWidth={1.5} aria-hidden="true" />
+                    <input
+                      id="reg-pwd"
+                      type={regShowPwd ? "text" : "password"}
+                      placeholder="至少 8 位"
+                      value={regPassword}
+                      autoComplete="new-password"
+                      aria-invalid={Boolean(regErrors.password)}
+                      onChange={(event) => setRegValue("password", event.target.value)}
+                    />
+                    <button
+                      type="button"
+                      className={`toggle-pwd${regShowPwd ? " active" : ""}`}
+                      aria-label={regShowPwd ? "隐藏密码" : "显示密码"}
+                      aria-pressed={regShowPwd}
+                      title={regShowPwd ? "隐藏密码" : "显示密码"}
+                      onClick={() => setRegShowPwd((value) => !value)}
+                    >
+                      {regShowPwd ? <EyeOff size={18} strokeWidth={1.5} aria-hidden="true" /> : <Eye size={18} strokeWidth={1.5} aria-hidden="true" />}
+                    </button>
+                  </div>
+                </div>
+                <div className={`field${regErrors.password2 ? " has-error" : ""}`}>
+                  <label className="field-label" htmlFor="reg-pwd2">确认密码 <span className="req">*</span></label>
+                  <div className="field-input-wrap">
+                    <LockKeyhole className="ic-l" size={16} strokeWidth={1.5} aria-hidden="true" />
+                    <input
+                      id="reg-pwd2"
+                      type={regShowPwd2 ? "text" : "password"}
+                      placeholder="再输一次"
+                      value={regPassword2}
+                      autoComplete="new-password"
+                      aria-invalid={Boolean(regErrors.password2)}
+                      onChange={(event) => setRegValue("password2", event.target.value)}
+                    />
+                    <button
+                      type="button"
+                      className={`toggle-pwd${regShowPwd2 ? " active" : ""}`}
+                      aria-label={regShowPwd2 ? "隐藏密码" : "显示密码"}
+                      aria-pressed={regShowPwd2}
+                      title={regShowPwd2 ? "隐藏密码" : "显示密码"}
+                      onClick={() => setRegShowPwd2((value) => !value)}
+                    >
+                      {regShowPwd2 ? <EyeOff size={18} strokeWidth={1.5} aria-hidden="true" /> : <Eye size={18} strokeWidth={1.5} aria-hidden="true" />}
+                    </button>
+                  </div>
+                </div>
+              </div>
+
+              <div className="field">
+                <label className="field-label" htmlFor="reg-invite">
+                  邀请码 <span className="hint">可选 · 团队邀请才需要</span>
+                </label>
+                <div className="field-input-wrap">
+                  <Ticket className="ic-l" size={16} strokeWidth={1.5} aria-hidden="true" />
+                  <input
+                    id="reg-invite"
+                    type="text"
+                    placeholder="例: TEAM-XXXX-XXXX"
+                    value={regInvite}
+                    onChange={(event) => { setRegInvite(event.target.value); setError(""); }}
+                  />
+                </div>
+                <p className="field-note">
+                  {regInvite.trim() ? "填了码：将加入已有团队" : "没填码：将开新团队，你是超管"}
+                </p>
+              </div>
+
+              <label className={`agree${regErrors.agree ? " has-error" : ""}`}>
+                <input
+                  type="checkbox"
+                  checked={regAgree}
+                  onChange={(event) => { setRegAgree(event.target.checked); setRegErrors((c) => ({ ...c, agree: undefined })); setError(""); }}
+                />
+                <span>
+                  我已阅读并同意{" "}
+                  <a href="#" onClick={(event) => { event.preventDefault(); showToast("用户协议", "含数据处理 / 内容生成版权 / 计费规则三章 · 完整文本将在正式版接入"); }}>用户协议</a>{" "}
+                  与{" "}
+                  <a href="#" onClick={(event) => { event.preventDefault(); showToast("隐私政策", "遵循《个人信息保护法》· 团队数据存中国境内 · 默认不用于模型训练"); }}>隐私政策</a>，
+                  知悉「失败不扣费 · 确认后扣」的扣费规则。
+                </span>
+              </label>
+
+              {loginProgress && !error && (
+                <div className="login-progress" role="status" aria-live="polite">
+                  <span className="login-progress-spinner" aria-hidden="true"></span>
+                  <span>正在创建团队，进入 Airshelf…</span>
+                </div>
+              )}
+              {error && <div className="form-error" role="alert">{error}</div>}
+
+              <button className="btn-cta" type="submit" disabled={busy}>
+                {busy ? "创建团队中" : <>创建团队 · 开始使用 <ArrowRight size={15} strokeWidth={2} aria-hidden="true" /></>}
+              </button>
+
+              <div className="switch-row">
+                已有账号? <a href="/login" onClick={(event) => { event.preventDefault(); switchMode("login"); }}>去登录 →</a>
+              </div>
+            </form>
+          </section>
+        </div>
+        {toast && (
+          <div className="toast show" role="status" aria-live="polite">
+            <div className="ic-t"><Info size={13} aria-hidden="true" /></div>
+            <div className="txt">{toast.title}<span className="mono">// {toast.sub}</span></div>
+          </div>
+        )}
+      </main>
+    );
+  }
+
   return (
     <main className="auth-exact-page auth-login-page">
       <div className="auth-wrap">
         <span className="corner-tr" aria-hidden="true"></span><span className="corner-bl" aria-hidden="true"></span>
-        <aside className="auth-brand">
-          <div className="logo"><img className="logo-img" src="/assets/logo-dark.png" alt="Airshelf" /></div>
-          <div className="tag">// SHORT-VIDEO COMMERCE PLATFORM</div>
-          <div className="hero">
-            <h1>AI 全流程<br /><span className="h">短剧化</span>带货生成</h1>
-            <p>商品 → AI 脚本 → 故事板 → Seedance 视频片段 → 一键导出 9:16 ≤60s 成片。</p>
-          </div>
-          <div className="foot"><a href="#">关于</a><a href="#">定价</a><a href="#">联系</a><a href="#">隐私</a></div>
-        </aside>
+        {brand}
         <section className="auth-form" aria-label="登录">
-          <div className="h-row"><h2>登录</h2><span className="sub">// LOGIN</span></div>
-          <form id="login-form" autoComplete="off" onSubmit={submit} noValidate>
+          <div className="h-row"><h2>登录</h2><span className="sub">// /auth/login</span></div>
+          <form id="login-form" autoComplete="off" onSubmit={submitLogin} noValidate>
+            <p className="lead">用团队账号登录，进入你的工作台与生产管线。</p>
             <div className={`field${fieldErrors.username ? " has-error" : ""}`}>
               <label className="field-label" htmlFor="auth-username">用户名 <span className="req">*</span></label>
               <div className="field-input-wrap">
@@ -168,9 +457,21 @@ export function AuthScreen({
             </div>
           )}
           {error && <div className="form-error" role="alert">{error}</div>}
-          <button className="btn-cta" type="button" form="login-form" disabled={busy} onClick={() => { void submit(); }}>
+          <button className="btn-cta" type="button" form="login-form" disabled={busy} onClick={() => { void submitLogin(); }}>
             {busy ? "登录中" : "登录"}
           </button>
+          <div className="divider"><span className="line"></span><span className="txt">OR</span><span className="line"></span></div>
+          <div className="sso-row">
+            <button type="button" className="sso-btn" onClick={() => showToast("微信扫码", "对接中 · 当前请用用户名 + 密码登录")}>
+              <ScanLine size={14} strokeWidth={1.6} aria-hidden="true" /> 微信扫码
+            </button>
+            <button type="button" className="sso-btn" onClick={() => showToast("飞书 SSO", "对接中 · 当前请用用户名 + 密码登录")}>
+              <ShieldCheck size={14} strokeWidth={1.6} aria-hidden="true" /> 飞书 SSO
+            </button>
+          </div>
+          <div className="switch-row">
+            还没账号? <a href="/register" onClick={(event) => { event.preventDefault(); switchMode("register"); }}>注册团队 →</a>
+          </div>
         </div>
       </div>
       {toast && (
diff --git a/core/frontend/src/routes/route-config.ts b/core/frontend/src/routes/route-config.ts
index db01736..84392fb 100644
--- a/core/frontend/src/routes/route-config.ts
+++ b/core/frontend/src/routes/route-config.ts
@@ -33,7 +33,7 @@ export type Page =
   | "settings"
   | "settingsNotify";
 
-export type AuthMode = "login";
+export type AuthMode = "login" | "register";
 export type ResolvedRoute = {
   page: Page;
   authMode: AuthMode;
@@ -111,7 +111,7 @@ export function resolveRoute(): ResolvedRoute {
   const search = new URLSearchParams(window.location.search);
   const hash = window.location.hash.replace("#", "");
 
-  if (path === "/register" || hash === "register") return { page: "dashboard", authMode: "login", hash };
+  if (path === "/register" || hash === "register") return { page: "dashboard", authMode: "register", hash };
   if (path === "/login") return { page: "dashboard", authMode: "login", hash };
   if (path === "/" && isPage(hash)) return { page: hash, authMode: "login", hash };
   if (path === "/" || path === "/dashboard") return { page: "dashboard", authMode: "login", hash };
diff --git a/core/frontend/src/styles.css b/core/frontend/src/styles.css
index 7cb0da5..639e6bd 100644
--- a/core/frontend/src/styles.css
+++ b/core/frontend/src/styles.css
@@ -1075,6 +1075,213 @@ nav button svg { width: 14px; height: 14px; color: var(--ink-3); }
   font-weight: 400;
 }
 
+/* lead 引导文案 + mono 副标(登录补、注册自带) */
+.auth-exact-page .auth-form .lead {
+  font-size: 13px;
+  color: var(--black-alpha-56);
+  margin: 0 0 22px;
+  line-height: 1.6;
+}
+.auth-exact-page.auth-login-page .auth-form .lead { margin: 0 0 20px; }
+
+/* OR 分割线 + 第三方 SSO(登录页) */
+.auth-exact-page .divider {
+  display: flex;
+  align-items: center;
+  gap: 10px;
+  margin: 18px 0 14px;
+}
+.auth-exact-page .divider .line { flex: 1; height: 1px; background: var(--border-faint); }
+.auth-exact-page .divider .txt {
+  font-family: var(--font-mono);
+  font-size: 12px;
+  color: var(--black-alpha-32);
+  letter-spacing: .08em;
+  text-transform: uppercase;
+}
+.auth-exact-page .sso-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 10px;
+}
+.auth-exact-page .sso-btn {
+  background: var(--surface);
+  border: 1px solid var(--border-faint);
+  border-radius: var(--r-md);
+  padding: 10px 12px;
+  font-size: 13px;
+  color: var(--accent-black);
+  cursor: pointer;
+  font-family: inherit;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  gap: 8px;
+  transition: border-color var(--t-base);
+}
+.auth-exact-page .sso-btn:hover { border-color: var(--black-alpha-32); }
+.auth-exact-page .sso-btn svg { width: 14px; height: 14px; }
+
+/* 登录 / 注册切换行 */
+.auth-exact-page .switch-row {
+  margin-top: 18px;
+  text-align: center;
+  font-size: 13px;
+  color: var(--black-alpha-56);
+}
+.auth-exact-page .switch-row a {
+  color: var(--heat);
+  text-decoration: none;
+  font-weight: 500;
+}
+.auth-exact-page .switch-row a:hover { text-decoration: underline; }
+
+/* ── 注册态:表单更宽 + 自然流(不再绝对定位 .auth-form) ── */
+.auth-exact-page.auth-register-page .auth-wrap {
+  height: auto;
+  min-height: 620px;
+  align-items: stretch;
+}
+.auth-exact-page.auth-register-page .auth-brand {
+  flex: 0 0 calc(100% - 460px);
+  width: calc(100% - 460px);
+}
+.auth-exact-page.auth-register-page .auth-form {
+  position: static;
+  width: 460px;
+  flex: 0 0 460px;
+  height: auto;
+  min-height: 0;
+  align-self: stretch;
+  padding: 40px 44px 32px;
+}
+.auth-exact-page.auth-register-page .auth-form form {
+  flex: 0 0 auto;
+  margin-top: 22px;
+}
+.auth-exact-page.auth-register-page .auth-form .h-row { gap: 6px; }
+.auth-exact-page.auth-register-page .auth-form h2 { font-size: 24px; }
+
+/* 注册:品牌区顶对齐 hero + 价值点列表 */
+.auth-exact-page .auth-brand .hero.hero-top {
+  margin-top: 26px;
+  margin-bottom: 0;
+}
+.auth-exact-page .auth-brand .hero.hero-top h1 { font-size: 28px; }
+.auth-exact-page .val-list {
+  margin: 28px 0 0;
+  display: flex;
+  flex-direction: column;
+  gap: 14px;
+}
+.auth-exact-page .val-item {
+  display: grid;
+  grid-template-columns: 22px minmax(0, 1fr);
+  gap: 12px;
+  align-items: start;
+}
+.auth-exact-page .val-item .ic-v {
+  width: 22px;
+  height: 22px;
+  border: 1px solid rgba(255, 255, 255, .18);
+  border-radius: var(--r-sm);
+  display: grid;
+  place-items: center;
+  color: var(--heat);
+}
+.auth-exact-page .val-item .ic-v svg { width: 12px; height: 12px; }
+.auth-exact-page .val-item .txt-v {
+  font-size: 13px;
+  color: rgba(255, 255, 255, .78);
+  line-height: 1.5;
+}
+.auth-exact-page .val-item .txt-v b { color: var(--accent-white); font-weight: 600; }
+
+/* 注册:label 行尾提示 + 双列密码 + 邀请码动态提示 + 协议勾选 */
+.auth-exact-page .field-label .hint {
+  margin-left: auto;
+  font-size: 11.5px;
+  font-weight: 400;
+  color: var(--black-alpha-32);
+}
+.auth-exact-page .field-row {
+  display: grid;
+  grid-template-columns: 1fr 1fr;
+  gap: 12px;
+  margin-bottom: 16px;
+}
+.auth-exact-page .field-row .field { margin-bottom: 0; }
+.auth-exact-page .field-note {
+  margin: 7px 0 0;
+  font-size: 12px;
+  color: var(--black-alpha-48);
+  font-family: var(--font-mono);
+  letter-spacing: .02em;
+}
+.auth-exact-page .agree {
+  display: flex;
+  align-items: flex-start;
+  gap: 8px;
+  font-size: 12.5px;
+  color: var(--black-alpha-56);
+  line-height: 1.6;
+  margin: 8px 0 18px;
+  cursor: pointer;
+  user-select: none;
+}
+.auth-exact-page .agree input {
+  margin-top: 3px;
+  width: 13px;
+  height: 13px;
+  accent-color: var(--heat);
+  flex-shrink: 0;
+}
+.auth-exact-page .agree a { color: var(--heat); text-decoration: none; }
+.auth-exact-page .agree a:hover { text-decoration: underline; }
+.auth-exact-page .agree.has-error a { color: var(--accent-crimson); }
+
+/* 注册:CTA / 提示在表单内自然流(不借用 .auth-submit-zone 的绝对定位) */
+.auth-exact-page.auth-register-page .btn-cta { margin-top: 4px; }
+.auth-exact-page.auth-register-page .form-error,
+.auth-exact-page.auth-register-page .login-progress {
+  position: static;
+  margin: 0 0 12px;
+}
+
+/* ── 登录态:加了 OR / 第三方 / 切换行后内容变高,改自然流让卡片随内容长高 ── */
+.auth-exact-page.auth-login-page .auth-wrap {
+  height: auto;
+  min-height: 560px;
+  align-items: stretch;
+}
+.auth-exact-page.auth-login-page .auth-brand {
+  flex: 0 0 calc(100% - 420px);
+  width: calc(100% - 420px);
+}
+.auth-exact-page.auth-login-page .auth-form {
+  position: static;
+  width: 420px;
+  flex: 0 0 420px;
+  height: auto;
+  min-height: 0;
+  align-self: stretch;
+}
+.auth-exact-page.auth-login-page .auth-form form {
+  flex: 0 0 auto;
+  margin-top: 24px;
+}
+.auth-exact-page.auth-login-page .auth-submit-zone {
+  position: static;
+  width: auto;
+  margin: 0;
+  padding-top: 0;
+}
+.auth-exact-page.auth-login-page .form-error,
+.auth-exact-page.auth-login-page .login-progress {
+  position: static;
+  margin: 0 0 12px;
+}
+
 @media (max-width: 820px) {
   .auth-exact-page .auth-wrap {
     flex-direction: column;
@@ -1097,6 +1304,13 @@ nav button svg { width: 14px; height: 14px; color: var(--ink-3); }
     width: auto;
     margin-top: auto;
   }
+  .auth-exact-page.auth-register-page .auth-brand,
+  .auth-exact-page.auth-register-page .auth-form {
+    flex: 0 0 auto;
+    width: auto;
+  }
+  .auth-exact-page.auth-register-page .val-list { display: none; }
+  .auth-exact-page.auth-register-page .auth-form { padding: 32px 28px; }
 }
 
 /* Dashboard 区类(.dash-grid/.dash-side/.recent-row/.shortcut/.tip)已迁入
diff --git a/core/frontend/src/types.ts b/core/frontend/src/types.ts
index 6e86a70..400ab74 100644
--- a/core/frontend/src/types.ts
+++ b/core/frontend/src/types.ts
@@ -20,6 +20,21 @@ export type TeamMember = {
   user: User;
 };
 
+export type Invitation = {
+  id: string;
+  code: string;
+  role: string;
+  email: string;
+  monthly_credit_limit: string;
+  status: "pending" | "used" | "revoked" | "expired";
+  expires_at: string;
+  used_by: string | null;
+  used_by_username: string | null;
+  used_at: string | null;
+  created_at: string;
+  register_url: string;
+};
+
 export type AuthPayload = {
   token: string;
   user: User;
diff --git a/core/qa/visual-parity/_wave35-auth.mjs b/core/qa/visual-parity/_wave35-auth.mjs
new file mode 100644
index 0000000..62ca5c1
--- /dev/null
+++ b/core/qa/visual-parity/_wave35-auth.mjs
@@ -0,0 +1,83 @@
+// Wave 3.5 auth walkthrough (scratch): 登录(秒进/无邮箱/第三方/切换) + 注册(无邮箱/5字段) + 切换态.
+import { chromium } from "playwright";
+import fs from "node:fs";
+import path from "node:path";
+
+const BASE = process.env.BASE || "http://localhost:5173";
+const OUT = path.resolve("../../../_qa_shots/wave35");
+fs.mkdirSync(OUT, { recursive: true });
+
+const browser = await chromium.launch({ headless: true });
+const r = { login: {}, register: {}, switch: {}, consoleErrors: [] };
+
+// 登录态(无 token,真在登录页)
+{
+  const ctx = await browser.newContext({ viewport: { width: 1440, height: 900 } });
+  const p = await ctx.newPage();
+  p.on("console", (m) => { if (m.type() === "error") r.consoleErrors.push("login:" + m.text()); });
+  p.on("pageerror", (e) => r.consoleErrors.push("login:PAGEERR:" + e.message));
+  await p.goto(BASE + "/login", { waitUntil: "load" });
+  await p.waitForTimeout(500);
+  r.login = {
+    usernameField: await p.locator("#auth-username").count(),
+    emailField: await p.locator("input[type=email]").count(),
+    ssoButtons: await p.locator(".sso-btn").count(),
+    switchRow: await p.locator(".switch-row").count(),
+  };
+  await p.screenshot({ path: path.join(OUT, "login.png") });
+  // 登录秒进(demo 账号)
+  await p.fill("#auth-username", "airshelf");
+  await p.fill("#auth-pwd", "Restraint2026");
+  const t0 = Date.now();
+  await p.click("button.btn-cta");
+  try {
+    await p.waitForFunction(() => !location.pathname.startsWith("/login"), { timeout: 12000 });
+    r.login.loginMs = Date.now() - t0;
+  } catch { r.login.loginMs = -1; }
+  await ctx.close();
+}
+
+// 注册态
+{
+  const ctx = await browser.newContext({ viewport: { width: 1440, height: 900 } });
+  const p = await ctx.newPage();
+  p.on("console", (m) => { if (m.type() === "error") r.consoleErrors.push("reg:" + m.text()); });
+  p.on("pageerror", (e) => r.consoleErrors.push("reg:PAGEERR:" + e.message));
+  await p.goto(BASE + "/register", { waitUntil: "load" });
+  await p.waitForTimeout(600);
+  const bodyText = await p.locator("body").innerText().catch(() => "");
+  r.register = {
+    emailField: await p.locator("input[type=email]").count(),
+    textInputs: await p.locator(".auth-form input[type=text], .auth-form input[type=password]").count(),
+    hasTeamLabel: /团队名|团队名称/.test(bodyText),
+    hasInvite: /邀请码/.test(bodyText),
+    hasEmailText: /邮箱/.test(bodyText),
+    ctaButton: await p.locator(".btn-cta").count(),
+    switchRow: await p.locator(".switch-row").count(),
+  };
+  await p.screenshot({ path: path.join(OUT, "register.png") });
+  await ctx.close();
+}
+
+// 切换:login → 点切换行 → register
+{
+  const ctx = await browser.newContext({ viewport: { width: 1440, height: 900 } });
+  const p = await ctx.newPage();
+  await p.goto(BASE + "/login", { waitUntil: "load" });
+  await p.waitForTimeout(500);
+  const link = p.locator(".switch-row a, .switch-row button").first();
+  if (await link.count()) {
+    await link.click();
+    await p.waitForTimeout(400);
+    r.switch = {
+      urlNowRegister: p.url().includes("/register"),
+      registerFormShown: /邀请码/.test(await p.locator("body").innerText().catch(() => "")),
+    };
+    await p.screenshot({ path: path.join(OUT, "switched-to-register.png") });
+  } else r.switch = "no switch link";
+  await ctx.close();
+}
+
+await browser.close();
+console.log(JSON.stringify(r, null, 2));
+fs.writeFileSync(path.join(OUT, "summary.json"), JSON.stringify(r, null, 2));