diff --git a/client/index.html b/client/index.html
index 119180d..ce9167d 100644
--- a/client/index.html
+++ b/client/index.html
@@ -2,14 +2,38 @@
 <html lang="zh-CN">
   <head>
     <meta charset="UTF-8" />
-    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no, viewport-fit=cover" />
     <link rel="icon" type="image/svg+xml" href="/static/favicon.svg" />
-    <title>宇之然AI维度 - AI 知识探索社区</title>
-    <meta name="description" content="宇之然AI维度 — 从5个维度系统理解人工智能：AI起源、发展、当前格局、学习工具、趋势跟踪。" />
-    <meta name="keywords" content="宇之然AI维度,AI知识,人工智能学习,AI科普,AI趋势,大模型学习" />
+    <title>宇之然AI维度 - AI知识探索社区 | 五维度系统学AI</title>
+    <meta name="description" content="宇之然AI维度：从起源、发展、格局、工具、趋势五个维度，系统理解人工智能。每日更新AI行业趋势与热点，支持问答、收藏与学习进度跟踪。" />
+    <meta name="keywords" content="宇之然AI维度,AI知识,AI学习,人工智能科普,AI趋势,AI大模型,AI问答,AI工具" />
+    <meta name="author" content="宇之然" />
+    <meta name="robots" content="index,follow" />
+    <meta property="og:type" content="website" />
+    <meta property="og:site_name" content="宇之然AI维度" />
+    <meta property="og:title" content="宇之然AI维度 - AI知识探索社区" />
+    <meta property="og:description" content="五维度系统学AI：起源、发展、格局、工具、趋势。每日AI行业热点更新。" />
+    <meta property="og:locale" content="zh_CN" />
+    <meta name="twitter:card" content="summary" />
+    <meta name="format-detection" content="telephone=no" />
+    <meta name="theme-color" content="#6366f1" />
+    <script type="application/ld+json">
+    {
+      "@context": "https://schema.org",
+      "@type": "WebApplication",
+      "name": "宇之然AI维度",
+      "description": "从五个维度系统理解人工智能的AI知识探索社区：AI起源、发展、当前格局、学习工具、趋势跟踪。",
+      "applicationCategory": "EducationalApplication",
+      "operatingSystem": "Web, 微信小程序",
+      "inLanguage": "zh-CN",
+      "offers": { "@type": "Offer", "price": "0", "priceCurrency": "CNY" }
+    }
+    </script>
+    <!--preload-links-->
+    <!--app-context-->
   </head>
   <body>
-    <div id="app"></div>
+    <div id="app"><!--app-html--></div>
     <script type="module" src="/src/main.js"></script>
   </body>
-</html>
\ No newline at end of file
+</html>
diff --git a/server/src/routes/seo.js b/server/src/routes/seo.js
new file mode 100644
index 0000000..4839768
--- /dev/null
+++ b/server/src/routes/seo.js
@@ -0,0 +1,102 @@
+import express from 'express'
+import fs from 'node:fs'
+import path from 'node:path'
+import { fileURLToPath } from 'node:url'
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+const router = express.Router()
+
+const SITE = process.env.SITE_URL || ''
+const origin = (req) => (SITE ? SITE.replace(/\/$/, '') : `${req.protocol}://${req.get('host')}`)
+
+const DESC =
+  '宇之然AI维度：从五个维度（AI起源、发展、当前格局、学习工具、趋势跟踪）系统理解人工智能的知识探索社区。每日更新AI行业趋势与热点，支持问答、收藏与学习进度跟踪。'
+
+const FAQ = [
+  ['宇之然AI维度是什么？', '一个AI知识探索社区：从五个维度系统梳理人工智能的起源、发展、当前格局、学习工具与行业趋势，并每日更新AI热点。'],
+  ['适合谁使用？', 'AI 零基础入门者、关注AI行业动态的从业者、需要结构化AI知识体系的学生与内容创作者。'],
+  ['内容如何保持新鲜？', '内置AI趋势定时采集，每天两次更新行业热点；支持问答与知识扩展。'],
+  ['免费使用吗？', '基础浏览与问答免费，注册登录后可使用收藏与学习进度等完整功能。'],
+  ['有微信小程序吗？', '有。微信搜索"AI维度"即可使用，数据与网页端同步。'],
+]
+
+router.get('/robots.txt', (req, res) => {
+  const o = origin(req)
+  res.type('text/plain').send(
+    [
+      'User-agent: *',
+      'Allow: /',
+      'Disallow: /api/',
+      '',
+      'User-agent: GPTBot',
+      'Allow: /',
+      'User-agent: ClaudeBot',
+      'Allow: /',
+      'User-agent: PerplexityBot',
+      'Allow: /',
+      '',
+      `Sitemap: ${o}/sitemap.xml`,
+      '',
+    ].join('\n')
+  )
+})
+
+router.get('/sitemap.xml', (req, res) => {
+  const o = origin(req)
+  const today = new Date().toISOString().slice(0, 10)
+  const urls = ['/', '/pages/trend/trend', '/pages/chat/chat', '/pages/dimension/dimension']
+  res.type('application/xml').send(
+    `<?xml version="1.0" encoding="UTF-8"?>\n<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">\n` +
+      urls.map((u) => `  <url><loc>${o}${u}</loc><lastmod>${today}</lastmod></url>`).join('\n') +
+      `\n</urlset>`
+  )
+})
+
+router.get('/llms.txt', (req, res) => {
+  const o = origin(req)
+  res.type('text/markdown').send(
+    `# 宇之然AI维度
+
+> ${DESC}
+
+## 核心内容
+- 五维度知识体系：AI起源、发展脉络、当前格局、学习工具、趋势跟踪
+- 每日AI趋势：定时采集行业热点（融资、产品发布、论文）
+- AI问答：基于知识库的智能问答
+
+## 免费与付费
+- 浏览与基础问答免费；注册登录解锁收藏与学习进度
+
+## 链接
+- [常见问题与产品说明](${o}/about)
+- [在线使用](${o}/)
+`
+  )
+})
+
+router.get('/about', (req, res) => {
+  const o = origin(req)
+  const faqHtml = FAQ.map(([q, a]) => `<div class="faq"><h3>${q}</h3><p>${a}</p></div>`).join('')
+  const faqLd = JSON.stringify({
+    '@context': 'https://schema.org',
+    '@type': 'FAQPage',
+    mainEntity: FAQ.map(([q, a]) => ({ '@type': 'Question', name: q, acceptedAnswer: { '@type': 'Answer', text: a } })),
+  })
+  res.type('html').send(`<!doctype html>
+<html lang="zh-CN"><head><meta charset="UTF-8"><meta name="viewport" content="width=device-width,initial-scale=1">
+<title>宇之然AI维度 - 产品介绍与常见问题 | AI知识探索社区</title>
+<meta name="description" content="${DESC} 产品介绍与常见问题。">
+<link rel="canonical" href="${o}/about">
+<script type="application/ld+json">${faqLd}</script>
+<style>body{font-family:-apple-system,'PingFang SC',sans-serif;color:#1f2333;max-width:720px;margin:0 auto;padding:32px 20px;line-height:1.8}h1{font-size:24px}h2{margin-top:28px}h3{font-size:16px;margin:12px 0 4px}.badge{display:inline-block;background:#6366f1;color:#fff;border-radius:999px;padding:4px 14px;font-size:13px}</style>
+</head><body>
+<span class="badge">AI 知识探索社区</span>
+<h1>宇之然AI维度</h1>
+<p>${DESC}</p>
+<h2>五个维度</h2><ol><li>AI 起源与历史</li><li>技术发展脉络</li><li>当前行业格局</li><li>学习工具与资源</li><li>趋势跟踪</li></ol>
+<h2>常见问题</h2>${faqHtml}
+<p style="color:#999;font-size:12px;margin-top:24px">© ${new Date().getFullYear()} 宇之然 · 微信小程序搜索"AI维度"</p>
+</body></html>`)
+})
+
+export default router