diff --git a/src/components/Breadcrumbs.tsx b/src/components/Breadcrumbs.tsx
index 1eab47c..59bfac9 100644
--- a/src/components/Breadcrumbs.tsx
+++ b/src/components/Breadcrumbs.tsx
@@ -1,7 +1,7 @@
-import React, { useMemo } from 'react'
+import React from 'react'
 import { Link, useLocation } from 'react-router-dom'
 import { ChevronRight, Home as HomeIcon } from 'lucide-react'
-import { getLocaleFromPathname, stripLocalePrefix, withLocalePath } from '../lib/i18n'
+import { getLocaleFromPathname, withLocalePath } from '../lib/i18n'
 
 export type BreadcrumbItem = {
   label: string
@@ -15,48 +15,40 @@ type BreadcrumbsProps = {
 
 export const Breadcrumbs: React.FC<BreadcrumbsProps> = ({ items, className }) => {
   const location = useLocation()
-  const locale = useMemo(() => getLocaleFromPathname(location.pathname), [location.pathname])
-
-  const homeLabel = locale === 'en' ? 'Home' : '首页'
-  const homeHref = withLocalePath(locale, '/')
-
-  const normalizedItems = useMemo(() => {
-    const prefix = stripLocalePrefix(location.pathname).startsWith('/') ? '' : '/'
-    void prefix
-    return items
-  }, [items, location.pathname])
+  const locale = getLocaleFromPathname(location.pathname)
 
   return (
     <nav aria-label={locale === 'en' ? 'Breadcrumb' : '面包屑导航'} className={className}>
-      <ol className="flex flex-wrap items-center gap-1 text-sm text-gray-600">
+      <ol className="flex flex-wrap items-center gap-1 text-sm text-white/85">
         <li className="flex items-center gap-1">
           <Link
-            to={homeHref}
-            className="inline-flex items-center gap-1 rounded-md px-2 py-1 hover:bg-white/60 hover:text-primary transition-colors"
+            to={withLocalePath(locale, '/')}
+            className="inline-flex items-center gap-1 rounded-md px-2 py-1 hover:bg-white/10 hover:text-white transition-colors"
             aria-label={locale === 'en' ? 'Go to homepage' : '返回首页'}
           >
             <HomeIcon size={16} />
-            <span>{homeLabel}</span>
+            <span>{locale === 'en' ? 'Home' : '首页'}</span>
           </Link>
         </li>
 
-        {normalizedItems.map((item, index) => {
-          const isLast = index === normalizedItems.length - 1
+        {items.map((item, index) => {
+          const isLast = index === items.length - 1
+
           return (
             <React.Fragment key={`${item.label}-${index}`}>
-              <li aria-hidden="true" className="text-gray-400">
+              <li aria-hidden="true" className="text-white/50">
                 <ChevronRight size={16} />
               </li>
               <li className="flex items-center">
                 {item.href && !isLast ? (
                   <Link
                     to={withLocalePath(locale, item.href)}
-                    className="rounded-md px-2 py-1 hover:bg-white/60 hover:text-primary transition-colors"
+                    className="rounded-md px-2 py-1 hover:bg-white/10 hover:text-white transition-colors"
                   >
                     {item.label}
                   </Link>
                 ) : (
-                  <span className="px-2 py-1 text-gray-700 font-medium" aria-current={isLast ? 'page' : undefined}>
+                  <span className="px-2 py-1 text-white font-medium" aria-current={isLast ? 'page' : undefined}>
                     {item.label}
                   </span>
                 )}
diff --git a/src/pages/Assistant.tsx b/src/pages/Assistant.tsx
new file mode 100644
index 0000000..d52090f
--- /dev/null
+++ b/src/pages/Assistant.tsx
@@ -0,0 +1,719 @@
+import React, { useEffect, useMemo, useRef, useState } from 'react'
+import { motion } from 'framer-motion'
+import {
+  Bot,
+  CheckCircle,
+  ClipboardList,
+  Loader2,
+  MessageSquare,
+  Phone,
+  Send,
+  Sparkles,
+  User,
+} from 'lucide-react'
+import { Header } from '../components/Header'
+import { Footer } from '../components/Footer'
+import { Breadcrumbs } from '../components/Breadcrumbs'
+import { FormSubmissions, Forms, SearchResults } from '../clientsdk/sdk.gen'
+import { createClient } from '../clientsdk/client'
+import { customQuerySerializer } from '../clientsdk/querySerializer'
+import { API_URL, TENANT_API_KEY, TENANT_SLUG } from '../config'
+import { usePageMeta } from '../hooks/usePageMeta'
+import { PAGE_META } from '../lib/constants'
+import { getLocaleFromPathname } from '../lib/i18n'
+
+type ChatRole = 'user' | 'assistant'
+
+type ChatMessage = {
+  id: string
+  role: ChatRole
+  content: string
+}
+
+type LeadFormData = {
+  name: string
+  phone: string
+  company: string
+  demand: string
+}
+
+type LeadFormErrors = Partial<Record<keyof LeadFormData, string>>
+
+type Locale = 'zh' | 'en'
+
+const client = createClient({
+  baseUrl: API_URL,
+  querySerializer: customQuerySerializer,
+  headers: {
+    'X-Tenant-Slug': TENANT_SLUG,
+    'X-API-Key': TENANT_API_KEY,
+  },
+})
+
+function uuid() {
+  return `${Date.now().toString(16)}-${Math.random().toString(16).slice(2)}`
+}
+
+function normalizeText(value: string) {
+  return value.trim().replace(/\s+/g, ' ')
+}
+
+function isValidPhone(phone: string) {
+  return /^1\d{10}$/.test(phone)
+}
+
+function stripHtml(html: string) {
+  const tmp = document.createElement('div')
+  tmp.innerHTML = html
+  return (tmp.textContent || tmp.innerText || '').trim()
+}
+
+function buildFallbackAnswer(locale: Locale, question: string) {
+  const q = question.replace(/\s+/g, '')
+
+  if (locale === 'en') {
+    return [
+      "I couldn't find an exact match in the knowledge base.",
+      'Please leave your phone number and consulting needs, and our team will follow up.',
+    ].join('\n')
+  }
+
+  if (/北京.*高新.*(认定|企业)|高新企业认定|高新技术企业/.test(q)) {
+    return [
+      '关于“北京高新技术企业认定”的常见条件（示例整理，具体以最新政策与主管部门口径为准）：',
+      '',
+      '1）基本门槛',
+      '- 企业依法注册、正常经营，近年无重大违法违规记录。',
+      '- 主要产品/服务属于国家重点支持的高新技术领域。',
+      '',
+      '2）核心评审维度（常见）',
+      '- 知识产权：发明/实用新型/软著等数量、质量与关联度。',
+      '- 科技人员占比：研发与技术人员结构、社保/劳动关系等合规性。',
+      '- 研发投入：近三年研发费用归集口径与占比。',
+      '- 高新收入占比：高新技术产品（服务）收入与主营结构。',
+      '- 创新能力：成果转化、组织管理、成长性等。',
+      '',
+      '3）材料准备建议（常见清单）',
+      '- 企业基本资料：营业执照、章程、财务报表/审计等。',
+      '- 知识产权与研发项目：证书、研发立项/结题、费用归集凭证。',
+      '- 产品/服务说明：技术领域、核心技术说明、收入佐证材料。',
+      '',
+      '如果你方便补充：行业 + 主要产品/服务 + 已有知识产权情况，我可以按你企业现状给出更具体的材料清单与推进路径。',
+      '',
+      '若需要人工进一步对接，请在右侧“留资”填写手机号（必填），我们会尽快联系。',
+    ].join('\n')
+  }
+
+  return [
+    '我暂时无法在知识库中定位到完全匹配的答案。',
+    '你可以补充更多背景（行业/地区/需求细节），或者直接在“留资”里提交手机号，我们安排人工跟进。',
+  ].join('\n')
+}
+
+async function searchKnowledge(question: string) {
+  const response = await SearchResults.listSearchResults({
+    client,
+    query: {
+      limit: 5,
+      depth: 2,
+      where: {
+        title: {
+          contains: question,
+        },
+      } as any,
+    },
+  })
+
+  return ((response as any)?.data?.docs ?? []) as any[]
+}
+
+async function resolveLeadFormId() {
+  const res = await Forms.listForms({
+    client,
+    query: {
+      limit: 100,
+      depth: 0,
+    },
+  })
+
+  const forms = ((res as any)?.data?.docs ?? []) as any[]
+  const target = forms.find((f) => {
+    const title = String(f?.title || '')
+    return /AI\s*智能助手|诚裕智能客服|AI Assistant|Assistant Lead|留资/i.test(title)
+  })
+
+  return (target?.id as string | undefined) ?? null
+}
+
+export const Assistant: React.FC = () => {
+  const locale = useMemo(() => getLocaleFromPathname(window.location.pathname), [])
+
+  usePageMeta({
+    title: locale === 'en' ? 'AI Assistant' : PAGE_META.assistant.title,
+    description: PAGE_META.assistant.description,
+    locale,
+  })
+
+  const [activeTab, setActiveTab] = useState<'chat' | 'lead'>('chat')
+  const [messages, setMessages] = useState<ChatMessage[]>(() => [
+    {
+      id: uuid(),
+      role: 'assistant',
+      content:
+        locale === 'en'
+          ? "Hi, I'm Chengyu AI Customer Service. Ask me anything, or leave your phone number for a callback."
+          : '你好，我是“诚裕智能客服”。你可以直接提问，我会基于知识库为你快速解答；如需人工进一步对接，也可以在“留资”提交手机号。',
+    },
+  ])
+
+  const [input, setInput] = useState('')
+  const [isReplying, setIsReplying] = useState(false)
+
+  const [leadFormId, setLeadFormId] = useState<string | null>(null)
+  const [leadFormLoading, setLeadFormLoading] = useState(true)
+
+  const [lead, setLead] = useState<LeadFormData>({ name: '', phone: '', company: '', demand: '' })
+  const [leadErrors, setLeadErrors] = useState<LeadFormErrors>({})
+  const [leadSubmitting, setLeadSubmitting] = useState(false)
+  const [leadSubmitted, setLeadSubmitted] = useState(false)
+  const [leadSubmitError, setLeadSubmitError] = useState<string | null>(null)
+
+  const listRef = useRef<HTMLDivElement | null>(null)
+
+  useEffect(() => {
+    const load = async () => {
+      try {
+        setLeadFormLoading(true)
+        const id = await resolveLeadFormId()
+        setLeadFormId(id)
+      } catch {
+        setLeadFormId(null)
+      } finally {
+        setLeadFormLoading(false)
+      }
+    }
+
+    load()
+  }, [])
+
+  useEffect(() => {
+    listRef.current?.scrollTo({ top: listRef.current.scrollHeight, behavior: 'smooth' })
+  }, [messages, isReplying])
+
+  const exampleQuestions = useMemo(
+    () =>
+      locale === 'en'
+        ? [
+            'What are typical criteria for high-tech enterprise recognition in Beijing?',
+            'What materials are usually required?',
+          ]
+        : ['北京高新企业认定需要哪些条件？', '高新企业申报通常需要准备哪些材料？'],
+    [locale],
+  )
+
+  const pushMessage = (role: ChatRole, content: string) => {
+    setMessages((prev) => [...prev, { id: uuid(), role, content }])
+  }
+
+  const replyTo = async (rawQuestion: string) => {
+    const question = normalizeText(rawQuestion)
+    if (!question) return
+
+    pushMessage('user', question)
+    setInput('')
+    setIsReplying(true)
+
+    try {
+      const docs = await searchKnowledge(question)
+      const top = docs[0]
+
+      if (docs.length > 0 && top?.doc?.value) {
+        const post = top.doc.value
+        const title = post?.title || top?.title
+        const excerpt = stripHtml(post?.content_html || '')
+
+        const answer =
+          locale === 'en'
+            ? [
+                `Based on the knowledge base: "${title}"`,
+                '',
+                excerpt ? excerpt.slice(0, 420) + (excerpt.length > 420 ? '…' : '') : '',
+                '',
+                'If you want a human follow-up, please leave your phone number in the lead form.',
+              ]
+                .filter(Boolean)
+                .join('\n')
+            : [
+                `已为你从知识库匹配到：${title}`,
+                '',
+                excerpt ? excerpt.slice(0, 320) + (excerpt.length > 320 ? '…' : '') : '（该条目暂无摘要内容）',
+                '',
+                '若需要人工进一步沟通，建议在“留资”提交手机号（必填），我们会尽快联系。',
+              ].join('\n')
+
+        pushMessage('assistant', answer)
+        return
+      }
+
+      const fallback = buildFallbackAnswer(locale, question)
+      pushMessage('assistant', fallback)
+      setActiveTab('lead')
+    } catch {
+      pushMessage(
+        'assistant',
+        locale === 'en'
+          ? 'Sorry, I cannot access the knowledge base right now. Please leave your phone number and we will contact you.'
+          : '抱歉，我暂时无法访问知识库。请在“留资”提交手机号，我们会尽快联系你。',
+      )
+      setActiveTab('lead')
+    } finally {
+      setIsReplying(false)
+    }
+  }
+
+  const handleSend = async () => {
+    if (isReplying) return
+    await replyTo(input)
+  }
+
+  const validateLead = () => {
+    const next: LeadFormErrors = {}
+
+    if (!lead.phone.trim()) next.phone = locale === 'en' ? 'Phone is required' : '手机号为必填项'
+    else if (!isValidPhone(lead.phone.trim())) next.phone = locale === 'en' ? 'Invalid 11-digit phone' : '请输入有效的 11 位手机号'
+
+    if (lead.demand.trim().length < 6) next.demand = locale === 'en' ? 'Please provide more details' : '请简单描述需求（至少 6 个字符）'
+
+    setLeadErrors(next)
+    return Object.keys(next).length === 0
+  }
+
+  const submitLead = async (e: React.FormEvent) => {
+    e.preventDefault()
+    setLeadSubmitError(null)
+
+    if (!validateLead()) return
+
+    setLeadSubmitting(true)
+
+    try {
+      if (!leadFormId) {
+        const cacheKey = 'chengyu_leads_local'
+        const record = {
+          ...lead,
+          createdAt: new Date().toISOString(),
+          source: 'assistant',
+        }
+
+        const existing = JSON.parse(localStorage.getItem(cacheKey) || '[]')
+        localStorage.setItem(cacheKey, JSON.stringify([record, ...existing]))
+
+        setLeadSubmitted(true)
+        setLead({ name: '', phone: '', company: '', demand: '' })
+        setTimeout(() => setLeadSubmitted(false), 3500)
+        return
+      }
+
+      await FormSubmissions.createFormSubmission({
+        client,
+        body: {
+          form: leadFormId,
+          submissionData: [
+            { field: 'name', value: lead.name.trim() },
+            { field: 'phone', value: lead.phone.trim() },
+            { field: 'company', value: lead.company.trim() },
+            { field: 'demand', value: lead.demand.trim() },
+            { field: 'source', value: 'AI智能助手' },
+          ].filter((item) => item.value),
+        },
+      } as any)
+
+      setLeadSubmitted(true)
+      setLead({ name: '', phone: '', company: '', demand: '' })
+      setTimeout(() => setLeadSubmitted(false), 3500)
+    } catch {
+      setLeadSubmitError(locale === 'en' ? 'Submission failed. Please try again.' : '提交失败，请稍后重试')
+    } finally {
+      setLeadSubmitting(false)
+    }
+  }
+
+  return (
+    <motion.div className="min-h-screen bg-background" initial={{ opacity: 0 }} animate={{ opacity: 1 }} transition={{ duration: 0.4 }}>
+      <Header />
+
+      <main>
+        <section className="pt-28 pb-14 bg-gradient-to-br from-primary to-primary-light">
+          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+            <motion.div className="text-white" initial={{ opacity: 0, y: 26 }} animate={{ opacity: 1, y: 0 }} transition={{ duration: 0.55 }}>
+              <Breadcrumbs items={[{ label: locale === 'en' ? 'AI Assistant' : 'AI智能助手', href: '/assistant' }]} className="mb-5" />
+
+              <div className="flex flex-col lg:flex-row lg:items-end lg:justify-between gap-6">
+                <div>
+                  <h1 className="text-4xl md:text-5xl font-bold tracking-tight">
+                    {locale === 'en' ? 'Chengyu AI Customer Service' : '诚裕智能客服'}
+                  </h1>
+                  <p className="mt-4 text-lg text-white/85 max-w-2xl leading-relaxed">
+                    {locale === 'en'
+                      ? 'Knowledge-base powered Q&A, plus a fast lead channel for consulting.'
+                      : '基于知识库的自然语言问答，同时也是诚裕集团重要的留资渠道。'}
+                  </p>
+                </div>
+
+                <div className="flex flex-wrap items-center gap-2">
+                  <span className="inline-flex items-center gap-2 px-4 py-2 rounded-full bg-white/10 border border-white/20 text-sm">
+                    <Sparkles size={16} />
+                    {locale === 'en' ? 'Fast response' : '快速响应'}
+                  </span>
+                  <span className="inline-flex items-center gap-2 px-4 py-2 rounded-full bg-white/10 border border-white/20 text-sm">
+                    <ClipboardList size={16} />
+                    {locale === 'en' ? 'Lead capture' : '留资转化'}
+                  </span>
+                </div>
+              </div>
+            </motion.div>
+          </div>
+        </section>
+
+        <section className="py-14 -mt-8">
+          <div className="max-w-7xl mx-auto px-4 sm:px-6 lg:px-8">
+            <div className="grid lg:grid-cols-5 gap-8">
+              <div className="lg:col-span-3">
+                <div className="bg-white rounded-2xl shadow-sm border border-gray-100 overflow-hidden">
+                  <div className="flex items-center justify-between px-6 py-4 border-b border-gray-100 bg-white/70">
+                    <div className="flex items-center gap-3">
+                      <div className="w-10 h-10 rounded-xl bg-primary/10 text-primary flex items-center justify-center">
+                        <Bot size={20} />
+                      </div>
+                      <div>
+                        <div className="font-semibold text-primary-dark">{locale === 'en' ? 'Chengyu AI Customer Service' : '诚裕智能客服'}</div>
+                        <div className="text-xs text-gray-500">{locale === 'en' ? 'Knowledge-base powered answers' : '基于知识库内容检索与整理'}</div>
+                      </div>
+                    </div>
+
+                    <div className="flex items-center gap-2">
+                      <button
+                        type="button"
+                        onClick={() => setActiveTab('chat')}
+                        className={`px-3 py-2 rounded-lg text-sm font-medium transition-colors ${
+                          activeTab === 'chat' ? 'bg-primary/5 text-primary' : 'text-gray-600 hover:bg-gray-50'
+                        }`}
+                      >
+                        {locale === 'en' ? 'Chat' : '对话'}
+                      </button>
+                      <button
+                        type="button"
+                        onClick={() => setActiveTab('lead')}
+                        className={`px-3 py-2 rounded-lg text-sm font-medium transition-colors ${
+                          activeTab === 'lead' ? 'bg-primary/5 text-primary' : 'text-gray-600 hover:bg-gray-50'
+                        }`}
+                      >
+                        {locale === 'en' ? 'Leave info' : '留资'}
+                      </button>
+                    </div>
+                  </div>
+
+                  {activeTab === 'chat' ? (
+                    <>
+                      <div ref={listRef} className="h-[460px] overflow-y-auto px-6 py-6 bg-gradient-to-b from-white to-background">
+                        <div className="space-y-4">
+                          {messages.map((m) => (
+                            <div key={m.id} className={`flex ${m.role === 'user' ? 'justify-end' : 'justify-start'}`}>
+                              <div
+                                className={`max-w-[85%] rounded-2xl px-4 py-3 text-sm leading-relaxed shadow-sm border ${
+                                  m.role === 'user'
+                                    ? 'bg-primary text-white border-primary/20'
+                                    : 'bg-white text-gray-800 border-gray-100'
+                                }`}
+                              >
+                                <pre className="whitespace-pre-wrap font-sans">{m.content}</pre>
+                              </div>
+                            </div>
+                          ))}
+
+                          {isReplying && (
+                            <div className="flex justify-start">
+                              <div className="max-w-[85%] rounded-2xl px-4 py-3 text-sm leading-relaxed shadow-sm border bg-white text-gray-800 border-gray-100 flex items-center gap-2">
+                                <Loader2 className="animate-spin" size={16} />
+                                <span>{locale === 'en' ? 'Thinking…' : '正在检索并整理…'}</span>
+                              </div>
+                            </div>
+                          )}
+                        </div>
+
+                        <div className="mt-6">
+                          <div className="text-xs text-gray-500 mb-2">{locale === 'en' ? 'Try examples:' : '试试这些问题：'}</div>
+                          <div className="flex flex-wrap gap-2">
+                            {exampleQuestions.map((q) => (
+                              <button
+                                key={q}
+                                type="button"
+                                onClick={() => void replyTo(q)}
+                                className="text-left px-3 py-2 rounded-xl bg-white border border-gray-100 hover:border-primary/30 hover:bg-primary/5 transition-colors text-sm text-gray-700"
+                              >
+                                {q}
+                              </button>
+                            ))}
+                          </div>
+                        </div>
+                      </div>
+
+                      <div className="px-6 py-4 border-t border-gray-100 bg-white">
+                        <div className="flex items-end gap-3">
+                          <div className="flex-1">
+                            <label htmlFor="assistantInput" className="sr-only">
+                              {locale === 'en' ? 'Message input' : '输入问题'}
+                            </label>
+                            <textarea
+                              id="assistantInput"
+                              value={input}
+                              onChange={(e) => setInput(e.target.value)}
+                              placeholder={locale === 'en' ? 'Type your question…' : '请输入你的问题…'}
+                              rows={2}
+                              className="w-full resize-none rounded-xl border border-gray-200 px-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-primary/20 focus:border-primary"
+                              onKeyDown={(e) => {
+                                if (e.key === 'Enter' && !e.shiftKey) {
+                                  e.preventDefault()
+                                  void handleSend()
+                                }
+                              }}
+                            />
+                          </div>
+                          <button
+                            type="button"
+                            onClick={() => void handleSend()}
+                            disabled={!normalizeText(input) || isReplying}
+                            className={`inline-flex items-center justify-center w-12 h-12 rounded-xl text-white transition-colors ${
+                              !normalizeText(input) || isReplying ? 'bg-gray-300 cursor-not-allowed' : 'bg-primary hover:bg-primary-light'
+                            }`}
+                            aria-label={locale === 'en' ? 'Send' : '发送'}
+                          >
+                            <Send size={18} />
+                          </button>
+                        </div>
+                        <p className="mt-2 text-xs text-gray-500">
+                          {locale === 'en' ? 'Tip: Enter to send, Shift+Enter for a new line.' : '提示：Enter 发送，Shift+Enter 换行。'}
+                        </p>
+                      </div>
+                    </>
+                  ) : (
+                    <div className="px-6 py-6 bg-white">
+                      <div className="flex items-start gap-3">
+                        <div className="w-10 h-10 rounded-xl bg-accent/15 text-accent-dark flex items-center justify-center">
+                          <Phone size={18} />
+                        </div>
+                        <div className="flex-1">
+                          <h2 className="text-lg font-semibold text-primary-dark">
+                            {locale === 'en' ? 'Leave your information for a callback' : '填写信息，便于我们联系你'}
+                          </h2>
+                          <p className="mt-1 text-sm text-gray-600 leading-relaxed">
+                            {locale === 'en'
+                              ? 'Phone number is required. The ops team can process submissions in the backend.'
+                              : '手机号为必填项；提交后，后台运营人员可及时查看并处理（可在运营平台表单里配置邮件通知）。'}
+                          </p>
+                        </div>
+                      </div>
+
+                      {leadSubmitted && (
+                        <div className="mt-5 p-4 rounded-xl border border-green-200 bg-green-50 flex items-start gap-3">
+                          <CheckCircle size={20} className="text-green-600 mt-0.5" />
+                          <div>
+                            <div className="font-medium text-green-800">{locale === 'en' ? 'Submitted successfully' : '提交成功'}</div>
+                            <div className="text-sm text-green-700 mt-1">
+                              {leadFormId
+                                ? locale === 'en'
+                                  ? 'Our team will contact you shortly.'
+                                  : '已收到你的信息，我们会尽快与你联系。'
+                                : locale === 'en'
+                                  ? 'Backend form not configured yet; saved locally for now.'
+                                  : '暂未找到后台表单配置，本次留资已临时保存在浏览器本地（请尽快在运营平台创建表单以正式留存）。'}
+                            </div>
+                          </div>
+                        </div>
+                      )}
+
+                      {leadSubmitError && (
+                        <div className="mt-5 p-4 rounded-xl border border-red-200 bg-red-50 text-sm text-red-700">
+                          {leadSubmitError}
+                        </div>
+                      )}
+
+                      <form onSubmit={submitLead} className="mt-6 space-y-5">
+                        <div className="grid sm:grid-cols-2 gap-4">
+                          <div>
+                            <label htmlFor="leadName" className="block text-sm font-medium text-gray-700 mb-2">
+                              {locale === 'en' ? 'Name' : '姓名'}
+                            </label>
+                            <div className="relative">
+                              <User size={18} className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400" />
+                              <input
+                                id="leadName"
+                                value={lead.name}
+                                onChange={(e) => {
+                                  setLead((p) => ({ ...p, name: e.target.value }))
+                                  if (leadErrors.name) setLeadErrors((p) => ({ ...p, name: undefined }))
+                                }}
+                                className="w-full rounded-xl border border-gray-200 pl-10 pr-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-primary/20 focus:border-primary"
+                                placeholder={locale === 'en' ? 'Your name (optional)' : '你的姓名（选填）'}
+                                autoComplete="name"
+                              />
+                            </div>
+                            {leadErrors.name && <p className="mt-1 text-xs text-red-600">{leadErrors.name}</p>}
+                          </div>
+
+                          <div>
+                            <label htmlFor="leadPhone" className="block text-sm font-medium text-gray-700 mb-2">
+                              {locale === 'en' ? 'Phone (required)' : '手机号（必填）'}
+                            </label>
+                            <div className="relative">
+                              <Phone size={18} className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400" />
+                              <input
+                                id="leadPhone"
+                                value={lead.phone}
+                                onChange={(e) => {
+                                  setLead((p) => ({ ...p, phone: e.target.value }))
+                                  if (leadErrors.phone) setLeadErrors((p) => ({ ...p, phone: undefined }))
+                                }}
+                                className={`w-full rounded-xl border pl-10 pr-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-primary/20 ${
+                                  leadErrors.phone ? 'border-red-300 focus:border-red-500' : 'border-gray-200 focus:border-primary'
+                                }`}
+                                placeholder={locale === 'en' ? '11-digit mobile' : '请输入 11 位手机号'}
+                                inputMode="numeric"
+                                autoComplete="tel"
+                              />
+                            </div>
+                            {leadErrors.phone && <p className="mt-1 text-xs text-red-600">{leadErrors.phone}</p>}
+                          </div>
+                        </div>
+
+                        <div>
+                          <label htmlFor="leadCompany" className="block text-sm font-medium text-gray-700 mb-2">
+                            {locale === 'en' ? 'Company' : '公司'}
+                          </label>
+                          <div className="relative">
+                            <MessageSquare size={18} className="absolute left-3 top-1/2 -translate-y-1/2 text-gray-400" />
+                            <input
+                              id="leadCompany"
+                              value={lead.company}
+                              onChange={(e) => {
+                                setLead((p) => ({ ...p, company: e.target.value }))
+                                if (leadErrors.company) setLeadErrors((p) => ({ ...p, company: undefined }))
+                              }}
+                              className="w-full rounded-xl border border-gray-200 pl-10 pr-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-primary/20 focus:border-primary"
+                              placeholder={locale === 'en' ? 'Company name (optional)' : '公司名称（选填）'}
+                              autoComplete="organization"
+                            />
+                          </div>
+                          {leadErrors.company && <p className="mt-1 text-xs text-red-600">{leadErrors.company}</p>}
+                        </div>
+
+                        <div>
+                          <label htmlFor="leadDemand" className="block text-sm font-medium text-gray-700 mb-2">
+                            {locale === 'en' ? 'Consulting needs' : '咨询需求'}
+                          </label>
+                          <textarea
+                            id="leadDemand"
+                            value={lead.demand}
+                            onChange={(e) => {
+                              setLead((p) => ({ ...p, demand: e.target.value }))
+                              if (leadErrors.demand) setLeadErrors((p) => ({ ...p, demand: undefined }))
+                            }}
+                            rows={4}
+                            className={`w-full resize-none rounded-xl border px-4 py-3 text-sm focus:outline-none focus:ring-2 focus:ring-primary/20 ${
+                              leadErrors.demand ? 'border-red-300 focus:border-red-500' : 'border-gray-200 focus:border-primary'
+                            }`}
+                            placeholder={locale === 'en' ? 'What do you want to consult about?' : '请描述你想咨询的问题（如：高新申报、体系搭建、审计口径…）'}
+                          />
+                          {leadErrors.demand && <p className="mt-1 text-xs text-red-600">{leadErrors.demand}</p>}
+                        </div>
+
+                        <button
+                          type="submit"
+                          disabled={leadSubmitting}
+                          className={`w-full rounded-xl py-3.5 text-sm font-medium text-white transition-colors inline-flex items-center justify-center gap-2 ${
+                            leadSubmitting ? 'bg-gray-400 cursor-not-allowed' : 'bg-primary hover:bg-primary-light'
+                          }`}
+                        >
+                          {leadSubmitting ? <Loader2 className="animate-spin" size={18} /> : <Send size={18} />}
+                          {leadSubmitting ? (locale === 'en' ? 'Submitting…' : '提交中…') : locale === 'en' ? 'Submit' : '提交留资'}
+                        </button>
+
+                        <div className="text-xs text-gray-500 leading-relaxed">
+                          {leadFormLoading ? (
+                            <span>{locale === 'en' ? 'Loading backend form configuration…' : '正在加载后台表单配置…'}</span>
+                          ) : leadFormId ? (
+                            <span>
+                              {locale === 'en'
+                                ? 'This submission will be recorded in the operations platform.'
+                                : '本次留资将记录到运营平台，便于运营人员及时查看处理。'}
+                            </span>
+                          ) : (
+                            <span>
+                              {locale === 'en'
+                                ? 'Backend form not found. Please create a form titled "AI Assistant Lead".'
+                                : '未找到后台留资表单。建议在运营平台创建标题包含“AI智能助手/留资”的表单，并配置通知（邮件/Webhook）以实现“及时提醒”。'}
+                            </span>
+                          )}
+                        </div>
+                      </form>
+                    </div>
+                  )}
+                </div>
+              </div>
+
+              <aside className="lg:col-span-2 space-y-6">
+                <div className="bg-white rounded-2xl shadow-sm border border-gray-100 p-6">
+                  <h2 className="text-lg font-semibold text-primary-dark flex items-center gap-2">
+                    <Sparkles size={18} className="text-accent-dark" />
+                    {locale === 'en' ? 'How it works' : '如何运行'}
+                  </h2>
+                  <ul className="mt-4 space-y-3 text-sm text-gray-700">
+                    <li className="flex gap-2">
+                      <span className="mt-0.5 w-6 h-6 rounded-lg bg-primary/10 text-primary flex items-center justify-center shrink-0">1</span>
+                      <span>{locale === 'en' ? 'Ops team maintains the knowledge base in the backend.' : '运营平台导入/维护知识库内容（文章、条目、资料等）。'}</span>
+                    </li>
+                    <li className="flex gap-2">
+                      <span className="mt-0.5 w-6 h-6 rounded-lg bg-primary/10 text-primary flex items-center justify-center shrink-0">2</span>
+                      <span>{locale === 'en' ? 'Users ask questions; assistant searches and summarizes.' : '客户在前台自然语言提问，助手检索知识库并结构化回答。'}</span>
+                    </li>
+                    <li className="flex gap-2">
+                      <span className="mt-0.5 w-6 h-6 rounded-lg bg-primary/10 text-primary flex items-center justify-center shrink-0">3</span>
+                      <span>{locale === 'en' ? 'If manual follow-up is needed, guide users to leave contact info.' : '当无法确定答案或需进一步沟通时，引导客户留资（手机号必填并校验）。'}</span>
+                    </li>
+                  </ul>
+                </div>
+
+                <div className="bg-white rounded-2xl shadow-sm border border-gray-100 p-6">
+                  <h2 className="text-lg font-semibold text-primary-dark">{locale === 'en' ? 'Lead channel focus' : '留资转化重点'}</h2>
+                  <p className="mt-3 text-sm text-gray-700 leading-relaxed">
+                    {locale === 'en'
+                      ? 'For Chengyu Group, the assistant is also an important acquisition channel.'
+                      : '对诚裕集团而言，该助手不仅用于快速响应，更是重要的获客与留资渠道。'}
+                  </p>
+                  <div className="mt-4 grid gap-3">
+                    <div className="rounded-xl border border-gray-100 bg-background p-4">
+                      <div className="text-sm font-medium text-primary-dark">{locale === 'en' ? 'Required field' : '必填字段'}</div>
+                      <div className="mt-1 text-xs text-gray-600">{locale === 'en' ? 'Phone number (11 digits) with basic validation.' : '手机号（11 位）必填并进行基础校验。'}</div>
+                    </div>
+                    <div className="rounded-xl border border-gray-100 bg-background p-4">
+                      <div className="text-sm font-medium text-primary-dark">{locale === 'en' ? 'Timely processing' : '及时提醒'}</div>
+                      <div className="mt-1 text-xs text-gray-600">
+                        {locale === 'en'
+                          ? 'Configure email/webhook notifications in the ops platform form settings.'
+                          : '建议在运营平台表单里配置邮件/Webhook 通知，确保运营人员及时处理。'}
+                      </div>
+                    </div>
+                  </div>
+                </div>
+              </aside>
+            </div>
+          </div>
+        </section>
+      </main>
+
+      <Footer />
+    </motion.div>
+  )
+}
+
+export default Assistant