diff --git a/website/src/components/AuthGate.jsx b/website/src/components/AuthGate.jsx
index 27d4cfc..04e0b48 100644
--- a/website/src/components/AuthGate.jsx
+++ b/website/src/components/AuthGate.jsx
@@ -1,22 +1,24 @@
 import React from 'react';
 import { sendCode, phoneLogin } from '@/services/auth';
+import MpQrLogin from '@/components/MpQrLogin';
 import '@/styles/auth.css';
 
 /**
- * 登录 / 注册墙（AuthGate）· 手机号 + 短信验证码
- * 用于"测评结果需登录"等场景。手机号即账号，未注册自动注册，无密码。
+ * 登录 / 注册墙（AuthGate）· 手机号 + 短信验证码 / 小程序扫码登录
+ * 用于"测评结果需登录"等场景。手机号即账号，未注册自动注册，无密码；小程序扫码为统一微信登录。
  * props:
  *   title        — 卡片标题（覆盖默认）
  *   subtitle     — 一句话说明
  *   onAuthed(user) — 登录 / 注册成功回调（已写入 token 与用户信息）
  */
 export default function AuthGate({ title, subtitle, onAuthed }) {
+  const [mode, setMode] = React.useState('phone'); // phone | mp
   const [phone, setPhone] = React.useState('');
   const [code, setCode] = React.useState('');
   const [debug, setDebug] = React.useState('');
   const [err, setErr] = React.useState('');
   const [busy, setBusy] = React.useState(false);
-  const [cd, setCd] = React.useState(0); // 发送倒计时
+  const [cd, setCd] = React.useState(0);
 
   const send = async () => {
     if (!/^1\d{10}$/.test(phone)) { setErr('请输入正确的 11 位手机号'); return; }
@@ -50,45 +52,49 @@ export default function AuthGate({ title, subtitle, onAuthed }) {
     }
   };
 
+  const TABS = [['phone', '手机号登录'], ['mp', '小程序扫码']];
+
   return (
-    <form className="auth-card" style={{ margin: '0 auto' }} onSubmit={submit}>
+    <div className="auth-card" style={{ margin: '0 auto' }}>
       <div className="auth-logo"><i className="fa-solid fa-tree" /></div>
-      <h1>{title || '手机号登录 / 注册'}</h1>
+      <h1>{title || '登录 / 注册'}</h1>
       {subtitle && <p className="auth-sub">{subtitle}</p>}
 
-      <div className="field">
-        <label>手机号</label>
-        <input
-          value={phone}
-          onChange={(e) => setPhone(e.target.value)}
-          inputMode="numeric"
-          maxLength={11}
-          placeholder="11 位手机号"
-          autoComplete="tel"
-        />
-      </div>
-      <div className="field">
-        <label>验证码</label>
-        <div style={{ display: 'flex', gap: 8 }}>
-          <input
-            value={code}
-            onChange={(e) => setCode(e.target.value)}
-            inputMode="numeric"
-            maxLength={6}
-            placeholder="6 位验证码"
-            style={{ flex: 1 }}
-            autoComplete="one-time-code"
-          />
-          <button type="button" className="btn btn-dark" onClick={send} disabled={cd > 0 || busy} style={{ whiteSpace: 'nowrap', flexShrink: 0 }}>
-            {cd > 0 ? `${cd}s 后重发` : '发送验证码'}
+      <div className="auth-tabs" style={{ marginBottom: 18 }}>
+        {TABS.map(([k, l]) => (
+          <button type="button" key={k} className={`auth-tab${mode === k ? ' active' : ''}`} onClick={() => { setErr(''); setMode(k); }}>
+            {l}
           </button>
-        </div>
+        ))}
       </div>
 
-      {debug && <div style={{ margin: '6px 0', fontSize: 12, color: '#a8f0c8', background: 'rgba(120,220,160,.1)', borderRadius: 8, padding: '6px 10px' }}>{debug}</div>}
-      {err && <div className="auth-err">{err}</div>}
-      <button className="btn btn-cta auth-btn" disabled={busy}>{busy ? '处理中…' : '登录 / 注册'}</button>
-      <div className="auth-foot">未注册的手机号将自动注册为账号</div>
-    </form>
+      {mode === 'phone' ? (
+        <form onSubmit={submit}>
+          <div className="field">
+            <label>手机号</label>
+            <input value={phone} onChange={(e) => setPhone(e.target.value)} inputMode="numeric" maxLength={11} placeholder="11 位手机号" autoComplete="tel" />
+          </div>
+          <div className="field">
+            <label>验证码</label>
+            <div style={{ display: 'flex', gap: 8 }}>
+              <input value={code} onChange={(e) => setCode(e.target.value)} inputMode="numeric" maxLength={6} placeholder="6 位验证码" style={{ flex: 1 }} autoComplete="one-time-code" />
+              <button type="button" className="btn btn-dark" onClick={send} disabled={cd > 0 || busy} style={{ whiteSpace: 'nowrap', flexShrink: 0 }}>
+                {cd > 0 ? `${cd}s 后重发` : '发送验证码'}
+              </button>
+            </div>
+          </div>
+          {debug && <div className="auth-debug">{debug}</div>}
+          {err && <div className="auth-err">{err}</div>}
+          <button className="btn btn-cta auth-btn" disabled={busy}>{busy ? '处理中…' : '登录 / 注册'}</button>
+          <div className="auth-foot">未注册的手机号将自动注册为账号</div>
+        </form>
+      ) : (
+        <div>
+          <MpQrLogin onAuthed={(user) => { if (onAuthed) onAuthed(user); }} />
+          {err && <div className="auth-err">{err}</div>}
+          <div className="auth-foot">已在微信小程序登录过的账号，扫码即可一键登录网页端</div>
+        </div>
+      )}
+    </div>
   );
 }
diff --git a/website/src/components/MpQrLogin.jsx b/website/src/components/MpQrLogin.jsx
new file mode 100644
index 0000000..17ac44d
--- /dev/null
+++ b/website/src/components/MpQrLogin.jsx
@@ -0,0 +1,60 @@
+import React from 'react';
+import { QRCodeSVG } from '@rc-component/qrcode';
+import { mpQrStart, mpQrPoll, applyAuthResult, getUser } from '@/services/auth';
+
+/** 小程序扫码登录：微信扫小程序码 → 打开小程序确认 → web 轮询拿 token。
+ *  props: tip, onAuthed(user) — 登录成功回调（已写入 token 与用户信息）。 */
+export default function MpQrLogin({ tip, onAuthed }) {
+  const [qrImage, setQrImage] = React.useState('');
+  const [qrUrl, setQrUrl] = React.useState('');
+  const [status, setStatus] = React.useState('loading');
+  const [error, setError] = React.useState('');
+
+  React.useEffect(() => {
+    let timer = null;
+    (async () => {
+      setStatus('loading');
+      try {
+        const r = await mpQrStart();
+        const { scene, qr_image, qr_url } = r || {};
+        setQrImage(qr_image || '');
+        setQrUrl(qr_url || '');
+        setStatus('pending');
+        timer = window.setInterval(async () => {
+          const res = await mpQrPoll(scene);
+          if (res.status === 'done' && res.profile) {
+            window.clearInterval(timer);
+            applyAuthResult(res.profile);
+            if (onAuthed) onAuthed(getUser());
+          } else if (res.status === 'expired') {
+            window.clearInterval(timer);
+            setStatus('error');
+            setError('二维码已过期，请刷新');
+          }
+        }, 2000);
+      } catch (e) {
+        setStatus('error');
+        setError(e.message || '获取小程序码失败');
+      }
+    })();
+    return () => { if (timer) window.clearInterval(timer); };
+    // eslint-disable-next-line react-hooks/exhaustive-deps
+  }, []);
+
+  if (status === 'loading') return <div className="auth-err" style={{ textAlign: 'center' }}>加载中…</div>;
+  if (status === 'error')
+    return (
+      <div style={{ textAlign: 'center' }}>
+        <div className="auth-err">{error}</div>
+        <button type="button" className="btn btn-dark auth-btn" onClick={() => window.location.reload()}>点击刷新</button>
+      </div>
+    );
+  return (
+    <div style={{ textAlign: 'center' }}>
+      <div style={{ display: 'inline-block', padding: 8, background: '#fff', borderRadius: 8 }}>
+        {qrImage ? <img src={qrImage} alt="小程序码" style={{ width: 200, height: 200 }} /> : <QRCodeSVG value={qrUrl} size={200} />}
+      </div>
+      <p className="auth-sub">{tip || '使用微信扫一扫打开小程序，在小程序内确认登录'}</p>
+    </div>
+  );
+}
diff --git a/website/src/styles/auth.css b/website/src/styles/auth.css
index d3adf83..01661c5 100644
--- a/website/src/styles/auth.css
+++ b/website/src/styles/auth.css
@@ -56,3 +56,6 @@
   background: var(--panel); border: 1px dashed var(--line); border-radius: 12px; padding: 13px 16px;
 }
 .pine-note .logout-link { margin-left: 8px; color: var(--primary); cursor: pointer; text-decoration: underline; }
+
+/* 登录调试信息（演示验证码提示） */
+.auth-debug { margin: 6px 0; font-size: 12px; color: var(--success); background: var(--success-soft); border-radius: 8px; padding: 6px 10px; }