diff --git a/backend/dist/admin.html b/backend/dist/admin.html
index 04ed3ec..c6fd9e7 100644
--- a/backend/dist/admin.html
+++ b/backend/dist/admin.html
@@ -5,67 +5,149 @@
 <meta name="viewport" content="width=device-width, initial-scale=1.0">
 <title>AUV 管理面板</title>
 <style>
-*{margin:0;padding:0;box-sizing:border-box}
-body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;background:#0f172a;color:#e2e8f0;min-height:100vh}
-.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px}
-.login-box{background:#1e293b;border-radius:12px;padding:40px;width:100%;max-width:400px;box-shadow:0 4px 24px rgba(0,0,0,.3)}
-.login-box h1{text-align:center;font-size:24px;margin-bottom:8px;color:#38bdf8}
-.login-box p{text-align:center;color:#94a3b8;margin-bottom:24px;font-size:14px}
+*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;border-color:var(--border)}
+:root{
+  --radius:0.625rem;
+  --font-sans:"PingFang SC","Microsoft YaHei","Hiragino Sans GB",sans-serif;
+  --background:oklch(1 0 0);
+  --foreground:oklch(0.129 0.042 264.695);
+  --card:oklch(1 0 0);
+  --card-foreground:oklch(0.129 0.042 264.695);
+  --primary:oklch(0.208 0.042 265.755);
+  --primary-foreground:oklch(0.984 0.003 247.858);
+  --secondary:oklch(0.968 0.007 247.896);
+  --secondary-foreground:oklch(0.208 0.042 265.755);
+  --muted:oklch(0.968 0.007 247.896);
+  --muted-foreground:oklch(0.521 0.011 257.2);
+  --accent:oklch(0.968 0.007 247.896);
+  --accent-foreground:oklch(0.208 0.042 265.755);
+  --destructive:oklch(0.577 0.245 27.325);
+  --destructive-foreground:oklch(0.984 0.003 247.858);
+  --border:oklch(0.929 0.013 255.508);
+  --input:oklch(0.929 0.013 255.508);
+  --ring:oklch(0.704 0.04 256.788);
+}
+.dark{
+  --background:oklch(0.205 0 0);
+  --foreground:oklch(0.984 0.003 247.858);
+  --card:oklch(0.205 0 0);
+  --card-foreground:oklch(0.984 0.003 247.858);
+  --primary:oklch(0.929 0.013 255.508);
+  --primary-foreground:oklch(0.208 0.042 265.755);
+  --secondary:oklch(0.279 0.041 260.031);
+  --secondary-foreground:oklch(0.984 0.003 247.858);
+  --muted:oklch(0.279 0.041 260.031);
+  --muted-foreground:oklch(0.804 0.008 256.9);
+  --accent:oklch(0.279 0.041 260.031);
+  --accent-foreground:oklch(0.984 0.003 247.858);
+  --destructive:oklch(0.704 0.191 22.216);
+  --destructive-foreground:oklch(0.984 0.003 247.858);
+  --border:oklch(1 0 0 / 10%);
+  --input:oklch(1 0 0 / 15%);
+  --ring:oklch(0.551 0.027 264.364);
+}
+body{font-family:var(--font-sans);background:var(--background);color:var(--foreground);min-height:100vh}
+
+/* Login */
+.login-wrap{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:16px;background:linear-gradient(135deg,var(--background),color-mix(in oklch,var(--muted) 30%,var(--background)),var(--background))}
+.login-card{background:var(--card);border:1px solid var(--border);border-radius:calc(var(--radius) + 8px);padding:32px 28px;width:100%;max-width:380px;box-shadow:0 4px 24px oklch(0 0 0 / .06)}
+.login-card h1{font-size:22px;font-weight:700;margin-bottom:4px;background:linear-gradient(to right,var(--primary),color-mix(in oklch,var(--primary) 70%,var(--foreground)));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}
+.login-card p{text-align:center;color:var(--muted-foreground);font-size:13px;margin-bottom:24px}
 .form-group{margin-bottom:16px}
-.form-group label{display:block;font-size:13px;color:#94a3b8;margin-bottom:6px}
-.form-group input{width:100%;padding:10px 14px;border:1px solid #334155;border-radius:8px;background:#0f172a;color:#e2e8f0;font-size:15px;outline:none;transition:border .2s}
-.form-group input:focus{border-color:#38bdf8}
-.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 20px;border:none;border-radius:8px;font-size:14px;font-weight:500;cursor:pointer;transition:all .2s;width:100%}
-.btn-primary{background:#38bdf8;color:#0f172a}.btn-primary:hover{background:#7dd3fc}
-.btn-danger{background:#ef4444;color:#fff}.btn-danger:hover{background:#f87171}
-.btn-sm{padding:6px 14px;width:auto;font-size:13px}
-.btn:disabled{opacity:.5;cursor:not-allowed}
-.error{color:#f87171;font-size:13px;margin-top:8px;text-align:center}
+.form-group label{display:block;font-size:13px;color:var(--muted-foreground);margin-bottom:6px;font-weight:500}
+.form-group input{width:100%;padding:9px 12px;border:1px solid var(--input);border-radius:var(--radius);background:var(--background);color:var(--foreground);font-size:14px;font-family:var(--font-sans);outline:none;transition:border-color .2s}
+.form-group input:focus{border-color:var(--ring);box-shadow:0 0 0 2px color-mix(in oklch,var(--ring) 20%,transparent)}
+
+/* Buttons */
+.btn{display:inline-flex;align-items:center;justify-content:center;padding:9px 16px;border:none;border-radius:var(--radius);font-size:14px;font-weight:500;font-family:var(--font-sans);cursor:pointer;transition:all .15s;gap:6px;line-height:1.4}
+.btn-primary{background:var(--primary);color:var(--primary-foreground)}.btn-primary:hover{opacity:.9}
+.btn-destructive{background:var(--destructive);color:var(--destructive-foreground)}.btn-destructive:hover{opacity:.9}
+.btn-outline{background:transparent;color:var(--foreground);border:1px solid var(--border)}.btn-outline:hover{background:var(--accent);color:var(--accent-foreground)}
+.btn-ghost{background:transparent;color:var(--muted-foreground)}.btn-ghost:hover{background:var(--accent);color:var(--accent-foreground)}
+.btn-sm{padding:5px 12px;font-size:12px}
+.btn-full{width:100%}
+.btn:disabled{opacity:.5;cursor:not-allowed;pointer-events:none}
+.error-msg{color:var(--destructive);font-size:13px;margin-top:8px;text-align:center}
 
 /* Dashboard */
-.dashboard{display:none;max-width:960px;margin:0 auto;padding:24px}
-.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px;padding-bottom:16px;border-bottom:1px solid #1e293b}
-.topbar h1{font-size:20px;color:#38bdf8}
-.topbar .actions{display:flex;gap:8px;align-items:center}
-.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:12px;margin-bottom:24px}
-.stat-card{background:#1e293b;border-radius:10px;padding:16px}
-.stat-card .label{font-size:12px;color:#94a3b8;margin-bottom:4px}
-.stat-card .value{font-size:24px;font-weight:600;color:#f8fafc}
-.section{background:#1e293b;border-radius:10px;padding:20px;margin-bottom:20px}
-.section h2{font-size:16px;color:#cbd5e1;margin-bottom:16px;display:flex;align-items:center;gap:8px}
-.section h2 .icon{font-size:18px}
+.dashboard{display:none;max-width:960px;margin:0 auto;padding:16px}
+@media(min-width:768px){.dashboard{padding:24px 32px}}
+.topbar{display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--border)}
+.topbar h1{font-size:18px;font-weight:700}
+@media(min-width:768px){.topbar h1{font-size:20px}}
+.topbar .actions{display:flex;gap:8px;align-items:center;flex-wrap:wrap}
+
+/* Stats grid */
+.stats-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-bottom:20px}
+@media(min-width:640px){.stats-grid{grid-template-columns:repeat(3,1fr)}}
+@media(min-width:768px){.stats-grid{grid-template-columns:repeat(6,1fr)}}
+.stat-card{background:var(--card);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);padding:14px 16px}
+.stat-card .label{font-size:12px;color:var(--muted-foreground);margin-bottom:4px;font-weight:500}
+.stat-card .value{font-size:22px;font-weight:700;color:var(--foreground)}
+@media(min-width:768px){.stat-card .value{font-size:20px}}
+
+/* Section */
+.section{background:var(--card);border:1px solid var(--border);border-radius:calc(var(--radius) + 4px);padding:16px;margin-bottom:16px}
+@media(min-width:768px){.section{padding:20px 24px}}
+.section h2{font-size:15px;font-weight:600;color:var(--foreground);margin-bottom:14px;display:flex;align-items:center;gap:8px}
+
+/* Table */
 table{width:100%;border-collapse:collapse}
-th{text-align:left;font-size:12px;color:#64748b;padding:8px 12px;border-bottom:1px solid #334155}
-td{padding:8px 12px;font-size:13px;border-bottom:1px solid #1e293b;color:#cbd5e1}
-tr:hover td{background:rgba(56,189,248,.05)}
-.badge{display:inline-block;padding:2px 8px;border-radius:4px;font-size:11px;font-weight:500}
-.badge-blue{background:rgba(56,189,248,.15);color:#38bdf8}
-.badge-green{background:rgba(34,197,94,.15);color:#22c55e}
-.trigger-result{margin-top:12px;padding:12px;border-radius:8px;font-size:13px;display:none}
-.trigger-result.success{display:block;background:rgba(34,197,94,.1);border:1px solid #22c55e;color:#22c55e}
-.trigger-result.error{display:block;background:rgba(239,68,68,.1);border:1px solid #ef4444;color:#f87171}
+th{text-align:left;font-size:12px;color:var(--muted-foreground);padding:8px 10px;border-bottom:1px solid var(--border);font-weight:500}
+td{padding:8px 10px;font-size:13px;border-bottom:1px solid color-mix(in oklch,var(--border) 50%,transparent);color:var(--card-foreground)}
+@media(min-width:768px){th,td{padding:10px 14px}}
+tr:hover td{background:color-mix(in oklch,var(--accent) 40%,transparent)}
+
+/* Badge */
+.badge{display:inline-block;padding:2px 8px;border-radius:calc(var(--radius) - 2px);font-size:11px;font-weight:500;background:color-mix(in oklch,var(--primary) 12%,transparent);color:var(--primary)}
+
+/* Result */
+.trigger-result{margin-top:14px;padding:12px 14px;border-radius:var(--radius);font-size:13px;display:none}
+.trigger-result.show{display:block}
+.trigger-result.success{background:color-mix(in oklch,#22c55e 10%,transparent);border:1px solid color-mix(in oklch,#22c55e 40%,transparent);color:#15803d}
+.trigger-result.error{background:color-mix(in oklch,var(--destructive) 10%,transparent);border:1px solid color-mix(in oklch,var(--destructive) 40%,transparent);color:var(--destructive)}
+.dark .trigger-result.success{color:#4ade80}
+.dark .trigger-result.error{color:#fca5a5}
+
+/* Loading */
 .loading{opacity:.6;pointer-events:none}
-.spinner{display:inline-block;width:14px;height:14px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .6s linear infinite;margin-right:6px}
+.spinner{display:inline-block;width:14px;height:14px;border:2px solid transparent;border-top-color:currentColor;border-radius:50%;animation:spin .6s linear infinite}
 @keyframes spin{to{transform:rotate(360deg)}}
-.toast{position:fixed;bottom:24px;right:24px;padding:12px 20px;border-radius:8px;font-size:13px;z-index:9999;animation:fadeIn .3s}
-@keyframes fadeIn{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
-.toast-ok{background:#166534;color:#bbf7d0}
-.toast-err{background:#991b1b;color:#fecaca}
+
+/* Toast */
+.toast{position:fixed;bottom:20px;right:20px;padding:10px 16px;border-radius:var(--radius);font-size:13px;z-index:9999;animation:fadeIn .3s;border:1px solid}
+@keyframes fadeIn{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
+.toast-ok{background:color-mix(in oklch,#22c55e 10%,var(--card));color:#15803d;border-color:color-mix(in oklch,#22c55e 30%,var(--border))}
+.toast-err{background:color-mix(in oklch,var(--destructive) 10%,var(--card));color:var(--destructive);border-color:color-mix(in oklch,var(--destructive) 30%,var(--border))}
+.dark .toast-ok{color:#4ade80}
+.dark .toast-err{color:#fca5a5}
+
+/* Modal */
+.modal-overlay{display:none;position:fixed;inset:0;background:oklch(0 0 0 / .5);z-index:100;align-items:center;justify-content:center;padding:16px}
+.modal-overlay.open{display:flex}
+.modal-box{background:var(--card);border:1px solid var(--border);border-radius:calc(var(--radius) + 8px);padding:24px;width:100%;max-width:360px;box-shadow:0 8px 32px oklch(0 0 0 / .12)}
+.modal-box h3{font-size:16px;font-weight:600;margin-bottom:16px}
+
+/* Theme toggle */
+.theme-toggle{position:fixed;bottom:16px;right:16px;z-index:50;display:flex;gap:4px;padding:4px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 2px 8px oklch(0 0 0 / .08)}
+.theme-btn{width:32px;height:32px;display:flex;align-items:center;justify-content:center;border:none;border-radius:calc(var(--radius) - 2px);cursor:pointer;background:transparent;color:var(--muted-foreground);font-size:16px;transition:all .15s}
+.theme-btn:hover{background:var(--accent);color:var(--accent-foreground)}
+.theme-btn.active{background:var(--primary);color:var(--primary-foreground)}
 </style>
 </head>
 <body>
 
 <!-- Login -->
 <div class="login-wrap" id="loginWrap">
-  <div class="login-box">
+  <div class="login-card">
     <h1>AUV 管理面板</h1>
     <p>A股走势追踪系统</p>
     <div class="form-group">
       <label>管理密码</label>
       <input type="password" id="pwdInput" placeholder="输入密码" autofocus>
     </div>
-    <div id="loginError" class="error" style="display:none"></div>
-    <button class="btn btn-primary" id="loginBtn" onclick="doLogin()">登 录</button>
+    <div id="loginError" class="error-msg" style="display:none"></div>
+    <button class="btn btn-primary btn-full" id="loginBtn" onclick="doLogin()">登 录</button>
   </div>
 </div>
 
@@ -78,8 +160,8 @@ tr:hover td{background:rgba(56,189,248,.05)}
         <span id="triggerSpinner" class="spinner" style="display:none"></span>
         触发 AI 分析
       </button>
-      <button class="btn btn-sm" style="background:#334155;color:#e2e8f0" onclick="showChangePwd()">改密码</button>
-      <button class="btn btn-sm" style="background:#334155;color:#e2e8f0" onclick="doLogout()">退出</button>
+      <button class="btn btn-outline btn-sm" onclick="showChangePwd()">改密码</button>
+      <button class="btn btn-ghost btn-sm" onclick="doLogout()">退出</button>
     </div>
   </div>
 
@@ -88,15 +170,15 @@ tr:hover td{background:rgba(56,189,248,.05)}
   <div id="triggerResult" class="trigger-result"></div>
 
   <div class="section">
-    <h2><span class="icon">📊</span> 分析报告</h2>
+    <h2>📊 分析报告</h2>
     <table>
-      <thead><tr><th>日期</th><th>标题</th><th>模型</th><th>Tokens</th><th>创建时间</th><th>操作</th></tr></thead>
+      <thead><tr><th>日期</th><th>标题</th><th>模型</th><th>Tokens</th><th>时间</th><th></th></tr></thead>
       <tbody id="reportsBody"></tbody>
     </table>
   </div>
 
   <div class="section">
-    <h2><span class="icon">📈</span> 近期报告</h2>
+    <h2>📈 近期报告</h2>
     <table>
       <thead><tr><th>日期</th><th>标题</th><th>Tokens</th></tr></thead>
       <tbody id="recentBody"></tbody>
@@ -105,27 +187,50 @@ tr:hover td{background:rgba(56,189,248,.05)}
 </div>
 
 <!-- Change Password Modal -->
-<div id="pwdModal" style="display:none;position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:100;display:none;align-items:center;justify-content:center">
-  <div style="background:#1e293b;border-radius:12px;padding:24px;width:360px">
-    <h3 style="margin-bottom:16px;font-size:16px">修改密码</h3>
+<div class="modal-overlay" id="pwdModal">
+  <div class="modal-box">
+    <h3>修改密码</h3>
     <div class="form-group"><label>原密码</label><input type="password" id="oldPwd"></div>
     <div class="form-group"><label>新密码</label><input type="password" id="newPwd"></div>
-    <div id="pwdError" class="error" style="display:none"></div>
+    <div id="pwdError" class="error-msg" style="display:none"></div>
     <div style="display:flex;gap:8px;margin-top:16px">
       <button class="btn btn-primary btn-sm" style="flex:1" onclick="doChangePwd()">确认</button>
-      <button class="btn btn-sm" style="flex:1;background:#334155;color:#e2e8f0" onclick="hideChangePwd()">取消</button>
+      <button class="btn btn-outline btn-sm" style="flex:1" onclick="hideChangePwd()">取消</button>
     </div>
   </div>
 </div>
 
+<!-- Theme Toggle -->
+<div class="theme-toggle">
+  <button class="theme-btn" onclick="setTheme('light')" id="themeLight">☀️</button>
+  <button class="theme-btn" onclick="setTheme('dark')" id="themeDark">🌙</button>
+  <button class="theme-btn" onclick="setTheme('system')" id="themeSystem">💻</button>
+</div>
+
 <script>
 const API = location.origin;
 let token = localStorage.getItem('admin_token');
 
+// Theme
+(function initTheme(){
+  const t = localStorage.getItem('theme') || 'system';
+  setTheme(t, false);
+})();
+
+function setTheme(mode, save=true) {
+  if (save) localStorage.setItem('theme', mode);
+  const dark = mode === 'dark' || (mode === 'system' && matchMedia('(prefers-color-scheme:dark)').matches);
+  document.documentElement.classList.toggle('dark', dark);
+  document.querySelectorAll('.theme-btn').forEach(b => b.classList.remove('active'));
+  document.getElementById(mode === 'light' ? 'themeLight' : mode === 'dark' ? 'themeDark' : 'themeSystem').classList.add('active');
+}
+matchMedia('(prefers-color-scheme:dark)').addEventListener('change', () => {
+  if ((localStorage.getItem('theme') || 'system') === 'system') setTheme('system', false);
+});
+
 // Init
 if (token) showDashboard();
 else document.getElementById('pwdInput').focus();
-
 document.getElementById('pwdInput').addEventListener('keydown', e => { if (e.key === 'Enter') doLogin() });
 
 async function api(method, path, body) {
@@ -177,7 +282,6 @@ async function showDashboard() {
     const stats = await api('GET', '/api/admin/stats');
     renderStats(stats);
     renderReports(stats.recentReports || []);
-    // load full list
     const reports = await api('GET', '/api/admin/reports');
     renderAllReports(reports);
   } catch (e) {
@@ -186,8 +290,7 @@ async function showDashboard() {
 }
 
 function renderStats(s) {
-  const grid = document.getElementById('statsGrid');
-  grid.innerHTML = `
+  document.getElementById('statsGrid').innerHTML = `
     <div class="stat-card"><div class="label">分析报告</div><div class="value">${s.reportCount}</div></div>
     <div class="stat-card"><div class="label">总 Tokens</div><div class="value">${s.totalTokens?.toLocaleString() || 0}</div></div>
     <div class="stat-card"><div class="label">股票集合</div><div class="value">${s.collectionCount}</div></div>
@@ -200,7 +303,7 @@ function renderStats(s) {
 function renderReports(list) {
   document.getElementById('recentBody').innerHTML = list.map(r =>
     `<tr><td>${r.trade_date}</td><td>${r.title || '-'}</td><td>${r.tokens_used || 0}</td></tr>`
-  ).join('') || '<tr><td colspan="3" style="color:#64748b;text-align:center">暂无数据</td></tr>';
+  ).join('') || '<tr><td colspan="3" style="color:var(--muted-foreground);text-align:center">暂无数据</td></tr>';
 }
 
 function renderAllReports(list) {
@@ -208,12 +311,12 @@ function renderAllReports(list) {
     `<tr>
       <td>${r.trade_date}</td>
       <td>${r.title || '-'}</td>
-      <td><span class="badge badge-blue">${r.model || '-'}</span></td>
+      <td><span class="badge">${r.model || '-'}</span></td>
       <td>${r.tokens_used || 0}</td>
       <td>${r.created_at || '-'}</td>
-      <td><button class="btn btn-danger btn-sm" style="padding:4px 10px;font-size:12px" onclick="deleteReport(${r.id})">删除</button></td>
+      <td><button class="btn btn-destructive btn-sm" style="padding:3px 10px;font-size:11px" onclick="deleteReport(${r.id})">删除</button></td>
     </tr>`
-  ).join('') || '<tr><td colspan="6" style="color:#64748b;text-align:center">暂无报告</td></tr>';
+  ).join('') || '<tr><td colspan="6" style="color:var(--muted-foreground);text-align:center">暂无报告</td></tr>';
 }
 
 async function doTrigger() {
@@ -223,17 +326,14 @@ async function doTrigger() {
   btn.disabled = true;
   spinner.style.display = 'inline-block';
   result.className = 'trigger-result';
-  result.style.display = 'none';
   try {
     const data = await api('POST', '/api/admin/trigger-analysis');
-    result.className = 'trigger-result success';
+    result.className = 'trigger-result show success';
     result.innerHTML = `✅ 分析完成 — Tokens: ${data.tokens_used} | 工具: ${(data.tools_used || []).length} 次调用`;
-    result.style.display = 'block';
-    showDashboard(); // refresh
+    showDashboard();
   } catch (e) {
-    result.className = 'trigger-result error';
+    result.className = 'trigger-result show error';
     result.innerHTML = `❌ ${e.message}`;
-    result.style.display = 'block';
   } finally {
     btn.disabled = false;
     spinner.style.display = 'none';
@@ -250,12 +350,12 @@ async function deleteReport(id) {
 }
 
 function showChangePwd() {
-  document.getElementById('pwdModal').style.display = 'flex';
+  document.getElementById('pwdModal').classList.add('open');
   document.getElementById('oldPwd').value = '';
   document.getElementById('newPwd').value = '';
   document.getElementById('pwdError').style.display = 'none';
 }
-function hideChangePwd() { document.getElementById('pwdModal').style.display = 'none'; }
+function hideChangePwd() { document.getElementById('pwdModal').classList.remove('open'); }
 
 async function doChangePwd() {
   const oldp = document.getElementById('oldPwd').value;