diff --git a/apps/admin-web/src/i18n/messages/en-US.ts b/apps/admin-web/src/i18n/messages/en-US.ts
index f128efe..900b75a 100644
--- a/apps/admin-web/src/i18n/messages/en-US.ts
+++ b/apps/admin-web/src/i18n/messages/en-US.ts
@@ -723,14 +723,9 @@ const enUS = {
       sourceURL: 'Article URL',
       sourceTitle: 'Source title',
       language: 'Article language',
-      industry: 'Industry / scenario',
       brandName: 'Brand / subject',
       region: 'Region',
-      targetAudience: 'Target audience',
-      contentGoal: 'Content goal',
-      tone: 'Tone',
-      lengthGoal: 'Length',
-      keywords: 'Keywords',
+      keywords: 'Optimization keywords',
       preservePoints: 'Keep / emphasize',
       avoidPoints: 'Avoid',
       extraRequirements: 'Extra requirements',
@@ -743,21 +738,17 @@ const enUS = {
         'Selected groups are retrieved in the backend and passed to generation as reference context.',
       sourceURLPlaceholder: 'https://example.com/article',
       sourceTitlePlaceholder: 'Optional. Citation titles are prefilled automatically.',
-      industryPlaceholder: 'For example: home improvement, education, SaaS, healthcare',
-      brandNamePlaceholder: 'Optional. Helps the article fit a specific brand or subject.',
+      brandNamePlaceholder: 'Required. Type the target subject, or choose from the brand library.',
       regionPlaceholder: 'For example: Shanghai, East China, nationwide, North America',
-      targetAudiencePlaceholder:
-        'For example: first-time buyers, channel partners, procurement leads',
-      contentGoalPlaceholder: 'For example: education, conversion, brand trust, selection advice',
-      tonePlaceholder: 'For example: professional, conversational, comparative, news analysis',
-      lengthGoalPlaceholder: 'For example: around 1200 words, short post, long-form guide',
-      keywordsPlaceholder: 'Type keywords and press Enter',
+      keywordsPlaceholder:
+        'Type optimization keywords and press Enter. Brand-library options appear after choosing a subject.',
       preservePointsPlaceholder: 'List facts, data, arguments, or examples that must be kept.',
       avoidPointsPlaceholder: 'List claims, competitors, compliance risks, or wording to avoid.',
       extraRequirementsPlaceholder:
         'Add channel, structure, title style, or industry-specific instructions.',
       queued: 'Rewrite task submitted and queued.',
       sourceURLRequired: 'Enter the source article URL first.',
+      brandNameRequired: 'Enter the brand / subject first.',
       submitError: 'Failed to submit rewrite task.',
       backToList: 'Back to rewrites',
     },
diff --git a/apps/admin-web/src/i18n/messages/zh-CN.ts b/apps/admin-web/src/i18n/messages/zh-CN.ts
index 7e7fd3d..d25e8dd 100644
--- a/apps/admin-web/src/i18n/messages/zh-CN.ts
+++ b/apps/admin-web/src/i18n/messages/zh-CN.ts
@@ -691,14 +691,9 @@ const zhCN = {
       sourceURL: "文章 URL",
       sourceTitle: "来源标题",
       language: "文章语言",
-      industry: "行业/场景",
       brandName: "品牌/主体",
       region: "地域",
-      targetAudience: "目标读者",
-      contentGoal: "内容目标",
-      tone: "语气风格",
-      lengthGoal: "篇幅要求",
-      keywords: "关键词",
+      keywords: "优化关键词",
       preservePoints: "必须保留/强调",
       avoidPoints: "需要规避",
       extraRequirements: "其他要求",
@@ -709,19 +704,15 @@ const zhCN = {
       knowledgeBaseHint: "选择后，后台会检索相关知识片段并作为生成参考，未选择则只基于来源文章和当前设置生成。",
       sourceURLPlaceholder: "https://example.com/article",
       sourceTitlePlaceholder: "可选，引用来源标题会自动带入",
-      industryPlaceholder: "例如：家居建材、教育培训、SaaS、医疗健康",
-      brandNamePlaceholder: "可选，填写后文章会自然贴合该品牌或主体",
+      brandNamePlaceholder: "必填，可输入目标达成词，或从品牌库选择",
       regionPlaceholder: "例如：上海、华东、全国、北美市场",
-      targetAudiencePlaceholder: "例如：首次购买用户、渠道代理、企业采购负责人",
-      contentGoalPlaceholder: "例如：科普说明、转化种草、品牌信任、选型建议",
-      tonePlaceholder: "例如：专业可信、轻松口语、评测对比、新闻解读",
-      lengthGoalPlaceholder: "例如：1200字左右、短文、深度长文",
-      keywordsPlaceholder: "输入关键词后回车，可多选",
+      keywordsPlaceholder: "输入优化关键词后回车，可多选；选择品牌库主体后会显示搜索词候选",
       preservePointsPlaceholder: "列出必须保留的事实、数据、观点或案例",
       avoidPointsPlaceholder: "列出不能出现的说法、竞品、合规禁区或表达方式",
       extraRequirementsPlaceholder: "补充行业、渠道、结构、标题风格等自由要求",
       queued: "仿写任务已提交，正在排队生成",
       sourceURLRequired: "请先填写来源文章 URL",
+      brandNameRequired: "请先填写品牌/主体",
       submitError: "仿写任务提交失败",
       backToList: "返回仿写列表",
     },
diff --git a/apps/admin-web/src/views/ImitationGenerateView.vue b/apps/admin-web/src/views/ImitationGenerateView.vue
index 17b37ce..ec7c090 100644
--- a/apps/admin-web/src/views/ImitationGenerateView.vue
+++ b/apps/admin-web/src/views/ImitationGenerateView.vue
@@ -1,13 +1,13 @@
 <script setup lang="ts">
 import { LeftOutlined, LinkOutlined } from '@ant-design/icons-vue'
-import { useMutation, useQueryClient } from '@tanstack/vue-query'
+import { useMutation, useQuery, useQueryClient } from '@tanstack/vue-query'
 import { message } from 'ant-design-vue'
 import { computed, reactive, watch } from 'vue'
 import { useI18n } from 'vue-i18n'
 import { useRoute, useRouter } from 'vue-router'
 
 import KnowledgeGroupSelect from '@/components/KnowledgeGroupSelect.vue'
-import { articlesApi } from '@/lib/api'
+import { articlesApi, brandsApi } from '@/lib/api'
 import { formatError } from '@/lib/errors'
 
 const route = useRoute()
@@ -19,13 +19,8 @@ const form = reactive({
   source_url: '',
   source_title: '',
   locale: 'zh-CN',
-  industry: '',
   brand_name: '',
   region: '',
-  target_audience: '',
-  content_goal: '',
-  tone: '',
-  length_goal: '',
   keywords: [] as string[],
   preserve_points: '',
   avoid_points: '',
@@ -34,8 +29,40 @@ const form = reactive({
   knowledge_group_ids: [] as number[],
 })
 
+const brandsQuery = useQuery({
+  queryKey: ['brands'],
+  queryFn: () => brandsApi.list(),
+})
+
+const brandNameOptions = computed(() =>
+  (brandsQuery.data.value ?? []).map((item) => ({
+    label: item.name,
+    value: item.name,
+  })),
+)
+
+const selectedBrand = computed(
+  () => brandsQuery.data.value?.find((item) => item.name === form.brand_name.trim()) ?? null,
+)
+
+const questionsQuery = useQuery({
+  queryKey: computed(() => ['brands', selectedBrand.value?.id, 'questions', 'imitation']),
+  enabled: computed(() => Boolean(selectedBrand.value?.id)),
+  queryFn: () => brandsApi.listQuestions(selectedBrand.value?.id as number),
+})
+
+const keywordOptions = computed(() =>
+  (questionsQuery.data.value ?? []).map((item) => ({
+    label: item.question_text,
+    value: item.question_text,
+  })),
+)
+
 const canSubmit = computed(
-  () => form.source_url.trim().length > 0 && !generateMutation.isPending.value,
+  () =>
+    form.source_url.trim().length > 0 &&
+    form.brand_name.trim().length > 0 &&
+    !generateMutation.isPending.value,
 )
 
 const generateMutation = useMutation({
@@ -44,13 +71,8 @@ const generateMutation = useMutation({
       source_url: form.source_url.trim(),
       source_title: form.source_title.trim(),
       locale: form.locale,
-      industry: form.industry.trim(),
       brand_name: form.brand_name.trim(),
       region: form.region.trim(),
-      target_audience: form.target_audience.trim(),
-      content_goal: form.content_goal.trim(),
-      tone: form.tone.trim(),
-      length_goal: form.length_goal.trim(),
       keywords: form.keywords.map((item) => item.trim()).filter(Boolean),
       preserve_points: form.preserve_points.trim(),
       avoid_points: form.avoid_points.trim(),
@@ -95,6 +117,10 @@ function submit(): void {
     message.warning(t('imitation.create.sourceURLRequired'))
     return
   }
+  if (!form.brand_name.trim()) {
+    message.warning(t('imitation.create.brandNameRequired'))
+    return
+  }
   generateMutation.mutate()
 }
 </script>
@@ -204,17 +230,11 @@ function submit(): void {
 
         <div class="imitation-generate-page__field-grid">
           <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.industry') }}</label>
-            <a-input
-              v-model:value="form.industry"
-              :placeholder="t('imitation.create.industryPlaceholder')"
-            />
-          </div>
-
-          <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.brandName') }}</label>
-            <a-input
+            <label class="required-asterisk">{{ t('imitation.create.brandName') }}</label>
+            <a-auto-complete
               v-model:value="form.brand_name"
+              allow-clear
+              :options="brandNameOptions"
               :placeholder="t('imitation.create.brandNamePlaceholder')"
             />
           </div>
@@ -227,44 +247,13 @@ function submit(): void {
             />
           </div>
 
-          <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.targetAudience') }}</label>
-            <a-input
-              v-model:value="form.target_audience"
-              :placeholder="t('imitation.create.targetAudiencePlaceholder')"
-            />
-          </div>
-
-          <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.contentGoal') }}</label>
-            <a-input
-              v-model:value="form.content_goal"
-              :placeholder="t('imitation.create.contentGoalPlaceholder')"
-            />
-          </div>
-
-          <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.tone') }}</label>
-            <a-input
-              v-model:value="form.tone"
-              :placeholder="t('imitation.create.tonePlaceholder')"
-            />
-          </div>
-
-          <div class="imitation-generate-page__field">
-            <label>{{ t('imitation.create.lengthGoal') }}</label>
-            <a-input
-              v-model:value="form.length_goal"
-              :placeholder="t('imitation.create.lengthGoalPlaceholder')"
-            />
-          </div>
-
           <div class="imitation-generate-page__field imitation-generate-page__field--wide">
             <label>{{ t('imitation.create.keywords') }}</label>
             <a-select
               v-model:value="form.keywords"
               mode="tags"
               style="width: 100%"
+              :options="keywordOptions"
               :placeholder="t('imitation.create.keywordsPlaceholder')"
             />
           </div>
diff --git a/deploy/k3s/config/prompts.yml b/deploy/k3s/config/prompts.yml
index c33ae3a..4c96e65 100644
--- a/deploy/k3s/config/prompts.yml
+++ b/deploy/k3s/config/prompts.yml
@@ -278,7 +278,8 @@ runtime:
     - 文章结构不动，文章分析核心维度不动，只动目标达成词（也就是brand_name）
     - 保留源文章中的事实信息、论证逻辑和可复用观点。
     - 不要逐句同义替换，不要复制源文的独特措辞，不要编造源文、知识库和补充要求之外的事实。
-    - 如果给出了地域、品牌、目标读者或内容目标，标题和正文都要自然贴合这些上下文。
+    - 如果给出了地域、品牌/主体或优化关键词，标题和正文都要自然贴合这些上下文。
+    - 全文篇幅控制在 2000 字左右。
     %s
 
     输出格式：Markdown。正文结构清晰，可直接进入文章编辑器。
@@ -301,14 +302,10 @@ runtime:
     zh-CN: "输出语言：中文简体。"
     en-US: "Output language: English."
   article_imitation_setting_labels:
-    industry: "行业/场景"
     brand_name: "品牌/主体"
     region: "地域"
-    target_audience: "目标读者"
-    content_goal: "内容目标"
-    tone: "语气风格"
     length_goal: "篇幅要求"
-    keywords: "关键词"
+    keywords: "优化关键词"
     preserve_points: "必须保留/强调"
     avoid_points: "需要规避"
     extra_requirements: "其他要求"
diff --git a/deploy/prompts.yml b/deploy/prompts.yml
index c33ae3a..4c96e65 100644
--- a/deploy/prompts.yml
+++ b/deploy/prompts.yml
@@ -278,7 +278,8 @@ runtime:
     - 文章结构不动，文章分析核心维度不动，只动目标达成词（也就是brand_name）
     - 保留源文章中的事实信息、论证逻辑和可复用观点。
     - 不要逐句同义替换，不要复制源文的独特措辞，不要编造源文、知识库和补充要求之外的事实。
-    - 如果给出了地域、品牌、目标读者或内容目标，标题和正文都要自然贴合这些上下文。
+    - 如果给出了地域、品牌/主体或优化关键词，标题和正文都要自然贴合这些上下文。
+    - 全文篇幅控制在 2000 字左右。
     %s
 
     输出格式：Markdown。正文结构清晰，可直接进入文章编辑器。
@@ -301,14 +302,10 @@ runtime:
     zh-CN: "输出语言：中文简体。"
     en-US: "Output language: English."
   article_imitation_setting_labels:
-    industry: "行业/场景"
     brand_name: "品牌/主体"
     region: "地域"
-    target_audience: "目标读者"
-    content_goal: "内容目标"
-    tone: "语气风格"
     length_goal: "篇幅要求"
-    keywords: "关键词"
+    keywords: "优化关键词"
     preserve_points: "必须保留/强调"
     avoid_points: "需要规避"
     extra_requirements: "其他要求"
diff --git a/packages/shared-types/src/index.ts b/packages/shared-types/src/index.ts
index e13d627..e065b76 100644
--- a/packages/shared-types/src/index.ts
+++ b/packages/shared-types/src/index.ts
@@ -748,13 +748,8 @@ export interface GenerateImitationRequest {
   source_url: string
   source_title?: string
   locale?: string
-  industry?: string
-  brand_name?: string
+  brand_name: string
   region?: string
-  target_audience?: string
-  content_goal?: string
-  tone?: string
-  length_goal?: string
   keywords?: string[]
   preserve_points?: string
   avoid_points?: string
diff --git a/server/configs/prompts.yml b/server/configs/prompts.yml
index c33ae3a..4c96e65 100644
--- a/server/configs/prompts.yml
+++ b/server/configs/prompts.yml
@@ -278,7 +278,8 @@ runtime:
     - 文章结构不动，文章分析核心维度不动，只动目标达成词（也就是brand_name）
     - 保留源文章中的事实信息、论证逻辑和可复用观点。
     - 不要逐句同义替换，不要复制源文的独特措辞，不要编造源文、知识库和补充要求之外的事实。
-    - 如果给出了地域、品牌、目标读者或内容目标，标题和正文都要自然贴合这些上下文。
+    - 如果给出了地域、品牌/主体或优化关键词，标题和正文都要自然贴合这些上下文。
+    - 全文篇幅控制在 2000 字左右。
     %s
 
     输出格式：Markdown。正文结构清晰，可直接进入文章编辑器。
@@ -301,14 +302,10 @@ runtime:
     zh-CN: "输出语言：中文简体。"
     en-US: "Output language: English."
   article_imitation_setting_labels:
-    industry: "行业/场景"
     brand_name: "品牌/主体"
     region: "地域"
-    target_audience: "目标读者"
-    content_goal: "内容目标"
-    tone: "语气风格"
     length_goal: "篇幅要求"
-    keywords: "关键词"
+    keywords: "优化关键词"
     preserve_points: "必须保留/强调"
     avoid_points: "需要规避"
     extra_requirements: "其他要求"
diff --git a/server/internal/tenant/app/article_imitation_service.go b/server/internal/tenant/app/article_imitation_service.go
index 4a833e9..bd4c8f1 100644
--- a/server/internal/tenant/app/article_imitation_service.go
+++ b/server/internal/tenant/app/article_imitation_service.go
@@ -47,13 +47,8 @@ type GenerateImitationRequest struct {
 	SourceURL         string   `json:"source_url" binding:"required"`
 	SourceTitle       string   `json:"source_title"`
 	Locale            string   `json:"locale"`
-	Industry          string   `json:"industry"`
 	BrandName         string   `json:"brand_name"`
 	Region            string   `json:"region"`
-	TargetAudience    string   `json:"target_audience"`
-	ContentGoal       string   `json:"content_goal"`
-	Tone              string   `json:"tone"`
-	LengthGoal        string   `json:"length_goal"`
 	Keywords          []string `json:"keywords"`
 	PreservePoints    string   `json:"preserve_points"`
 	AvoidPoints       string   `json:"avoid_points"`
@@ -135,6 +130,9 @@ func (s *ArticleImitationService) Generate(ctx context.Context, req GenerateImit
 	if err != nil {
 		return nil, err
 	}
+	if strings.TrimSpace(req.BrandName) == "" {
+		return nil, response.ErrBadRequest(40001, "brand_name_required", "brand_name is required")
+	}
 
 	quotaRepo := repository.NewQuotaRepository(s.pool)
 	balance, err := quotaRepo.GetCurrentBalance(ctx, actor.TenantID, "article_generation")
@@ -587,13 +585,9 @@ func buildImitationInputParams(sourceURL string, req GenerateImitationRequest) m
 		"source_url":          sourceURL,
 		"source_title":        strings.TrimSpace(req.SourceTitle),
 		"locale":              normalizeImitationLocale(req.Locale),
-		"industry":            strings.TrimSpace(req.Industry),
 		"brand_name":          strings.TrimSpace(req.BrandName),
 		"region":              strings.TrimSpace(req.Region),
-		"target_audience":     strings.TrimSpace(req.TargetAudience),
-		"content_goal":        strings.TrimSpace(req.ContentGoal),
-		"tone":                strings.TrimSpace(req.Tone),
-		"length_goal":         strings.TrimSpace(req.LengthGoal),
+		"length_goal":         "2000字左右",
 		"keywords":            normalizeImitationKeywords(req.Keywords),
 		"preserve_points":     strings.TrimSpace(req.PreservePoints),
 		"avoid_points":        strings.TrimSpace(req.AvoidPoints),
@@ -631,12 +625,8 @@ func buildImitationGenerationPrompt(params map[string]interface{}, sourceContent
 	}
 
 	var settings strings.Builder
-	appendPromptLine(&settings, "industry", extractString(params, "industry"))
 	appendPromptLine(&settings, "brand_name", extractString(params, "brand_name"))
 	appendPromptLine(&settings, "region", extractString(params, "region"))
-	appendPromptLine(&settings, "target_audience", extractString(params, "target_audience"))
-	appendPromptLine(&settings, "content_goal", extractString(params, "content_goal"))
-	appendPromptLine(&settings, "tone", extractString(params, "tone"))
 	appendPromptLine(&settings, "length_goal", extractString(params, "length_goal"))
 	if len(keywords) > 0 {
 		appendPromptLine(&settings, "keywords", strings.Join(keywords, "、"))
@@ -674,12 +664,8 @@ func buildImitationKnowledgeQuery(params map[string]interface{}) string {
 	}
 
 	appendValue(extractString(params, "source_title"))
-	appendValue(extractString(params, "industry"))
 	appendValue(extractString(params, "brand_name"))
 	appendValue(extractString(params, "region"))
-	appendValue(extractString(params, "target_audience"))
-	appendValue(extractString(params, "content_goal"))
-	appendValue(extractString(params, "tone"))
 	appendValue(strings.Join(extractStringList(params["keywords"], 16), "\n"))
 	appendValue(extractString(params, "extra_requirements"))