diff --git a/docs/asset-ai-question-log.md b/docs/asset-ai-question-log.md
new file mode 100644
index 0000000..edfa371
--- /dev/null
+++ b/docs/asset-ai-question-log.md
@@ -0,0 +1,23 @@
+# AI 问数全量记录
+
+在部署包含本次代码的服务之前，执行增量建表（只创建审计表，不修改业务数据）：
+
+```sh
+node --import tsx scripts/migrate-ai-questions.ts           # 只查看 SQL，不连接数据库
+node --import tsx scripts/migrate-ai-questions.ts --apply   # 使用部署环境 DB 配置执行
+```
+
+表：`bi_asset_ai_questions`。所有已登录、通过参数校验的 `/ask` 请求都先 INSERT，再执行查询；不按问题去重。
+未登录、空问题、非法请求体不作为用户提问保存。输入中的凭据会脱敏。没有自动清理策略；旧的需求缺口表仍按原有 90 天规则维护。
+
+- `event_type`：question 首次提问、followup 连续追问、action 下钻操作、feedback 未解决反馈。
+- `business_types`：JSON 数组，使用既有计划分类（inventory 库存、operating 运营、pending 待交车、abnormal 异动、flow 交还替换等）；综合问题可以有多个分类，无法完成理解时为空数组。
+- `outcome`：processing 处理中、success 成功、empty 无匹配、partial 部分回答、clarification 待澄清、help 使用说明、unsupported 暂不支持、failed 失败、cancelled 取消、rejected 拒绝执行、feedback 用户反馈。
+- `reason`：失败/拒绝/缺口原因代码，例如 busy、session_expired、generation、unsatisfied。
+- `actor_id` 是实际操作者；`user_id`、`login_name`、`user_name` 是当前数据权限用户；模拟视角另有 `is_preview` 与 `preview_session_id`。
+- `question` 保存接受的完整问题（最多 2000 字符，敏感凭据脱敏），`action_json` 保存下钻参数。会话、上级结果、当前结果、公司和权限级别分别关联。
+- `answer` 保存回答摘要、提示和子分析摘要，不复制车辆明细数据；另存引擎、开始/结束时间、毫秒耗时。
+
+初始写入失败返回 503，不继续执行无记录的查询。结束更新失败重试一次；原始问题仍在数据库，回答提示“处理结果暂未保存”，服务只输出记录 ID，不输出问题或数据库错误。进程突然终止或结束更新失败的记录保持 processing，可通过 started_at 识别长期未完成，不能将其算作成功。
+
+模拟用户提问同样记录，但不新增需求缺口反馈，也不改变原有只读业务权限。没有新增公开查询接口；数据库查看权限沿用现有管理制度。新表不能补回此前仅在内存中保存的历史问题。
diff --git a/migrations/20260928_asset_ai_questions.sql b/migrations/20260928_asset_ai_questions.sql
new file mode 100644
index 0000000..5bf9d89
--- /dev/null
+++ b/migrations/20260928_asset_ai_questions.sql
@@ -0,0 +1,31 @@
+-- Explicit additive migration. No business tables are changed and no historical records are purged.
+CREATE TABLE IF NOT EXISTS bi_asset_ai_questions (
+  id CHAR(36) PRIMARY KEY,
+  actor_id VARCHAR(64) NOT NULL,
+  user_id VARCHAR(64) NOT NULL,
+  login_name VARCHAR(255) NOT NULL,
+  user_name VARCHAR(255) NOT NULL,
+  permission_level VARCHAR(24) NOT NULL,
+  is_preview TINYINT(1) NOT NULL DEFAULT 0,
+  preview_session_id VARCHAR(64) NULL,
+  session_id VARCHAR(64) NULL,
+  base_result_id VARCHAR(64) NULL,
+  result_id VARCHAR(64) NULL,
+  subject VARCHAR(150) NULL,
+  event_type VARCHAR(24) NOT NULL,
+  question TEXT NULL,
+  action_json JSON NULL,
+  outcome VARCHAR(24) NOT NULL,
+  reason VARCHAR(64) NULL,
+  business_types JSON NULL,
+  engine VARCHAR(24) NULL,
+  answer MEDIUMTEXT NULL,
+  started_at DATETIME(3) NOT NULL,
+  finished_at DATETIME(3) NULL,
+  duration_ms BIGINT UNSIGNED NULL,
+  KEY user_time (user_id, started_at),
+  KEY actor_time (actor_id, started_at),
+  KEY result_time (outcome, started_at),
+  KEY session_time (session_id, started_at),
+  KEY event_time (event_type, started_at)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
diff --git a/scripts/migrate-ai-questions.ts b/scripts/migrate-ai-questions.ts
new file mode 100644
index 0000000..f12bff3
--- /dev/null
+++ b/scripts/migrate-ai-questions.ts
@@ -0,0 +1,16 @@
+import { readFile } from 'node:fs/promises';
+// Import the pool only after an explicit apply flag, to avoid accidental connections in review mode.
+const sql = await readFile(new URL('../migrations/20260928_asset_ai_questions.sql', import.meta.url), 'utf8');
+if (!process.argv.includes('--apply')) {
+  console.log(sql);
+  console.log('Review only. To create this audit table in the configured DB, pass --apply.');
+} else {
+  const { default: pool } = await import('../src/server/db.js');
+  try {
+    await pool.query(sql);
+    const [rows] = await pool.query('SELECT COUNT(*) AS columns_count FROM information_schema.columns WHERE table_schema=DATABASE() AND table_name=?', ['bi_asset_ai_questions']);
+    console.log('AI question audit table ready.', rows);
+  } finally {
+    await pool.end();
+  }
+}
diff --git a/src/modules/assets/assistant/AssetAssistant.tsx b/src/modules/assets/assistant/AssetAssistant.tsx
index 9d1783e..c7ecf27 100644
--- a/src/modules/assets/assistant/AssetAssistant.tsx
+++ b/src/modules/assets/assistant/AssetAssistant.tsx
@@ -34,7 +34,9 @@ import { useAuth } from "../../../auth/useAuth";
 import { ThinkingState } from "./ThinkingState";
 import { CompoundResultView } from "./CompoundResultView";
 import { BUSINESS_QUESTIONS, conversationTitle, findConversationResult, replaceAnalysisResult } from "./conversation-presentation";
+import { useMobileLayout } from "../useMobileLayout";
 import "./assistant.css";
+import "./mobile-assistant.css";
 
 type Turn = {
   id: number;
@@ -55,24 +57,28 @@ const PROMPTS = [
   {
     icon: BarChart3,
     title: "现在多少车在运营、多少车在库存？",
+    mobileTitle: "运营与库存",
     text: BUSINESS_QUESTIONS[0],
     detail: "总资产 · 运营 · 库存 · 运营率",
   },
   {
     icon: Truck,
     title: "库存集中在哪些车型和区域？",
+    mobileTitle: "库存分布",
     text: BUSINESS_QUESTIONS[1],
     detail: "库存分布 · 继续查看车辆",
   },
   {
     icon: History,
     title: "最近7天交车、还车分别多少？",
+    mobileTitle: "近 7 天交还车",
     text: BUSINESS_QUESTIONS[2],
     detail: "按日趋势 · 业务明细",
   },
   {
     icon: ListIcon,
     title: "有哪些车辆需要跟进？",
+    mobileTitle: "待跟进车辆",
     text: BUSINESS_QUESTIONS[3],
     detail: "异动详情 · 预计完成时间",
   },
@@ -94,6 +100,8 @@ export default function AssetAssistant({
   const dataScopeLabel = !user ? "正在确认数据范围"
     : user.permissionLevel === "full" ? "全量数据"
     : user.permissionLevel === "department" ? "部门数据" : "本人数据";
+  const mobile = useMobileLayout();
+  const [contextExpanded, setContextExpanded] = useState(false);
   const page = useRef<HTMLElement>(null);
   useLayoutEffect(() => {
     const viewport = window.visualViewport;
@@ -557,7 +565,7 @@ export default function AssetAssistant({
                       <p.icon size={18} aria-hidden="true" />
                       <ArrowUpRight size={14} aria-hidden="true" />
                     </div>
-                    <strong>{p.title}</strong>
+                    <strong>{mobile ? p.mobileTitle : p.title}</strong>
                     <span>{p.detail}</span>
                   </button>
                 ))}
@@ -745,7 +753,7 @@ export default function AssetAssistant({
           )}
         </div>
         <div className="aq-composer-area">
-          {turns.length > 0 && (
+          {turns.length > 0 && (!mobile || (viewedTurn !== undefined && viewedTurn !== turns.at(-1)?.id)) && (
             <button
               className="aq-latest-answer"
               onClick={() => revealTurn(turns[turns.length - 1].id)}
@@ -754,8 +762,8 @@ export default function AssetAssistant({
             </button>
           )}
           {lastPlan && (
-            <div className="aq-context">
-              <span>正在分析</span>
+            <details className="aq-context-disclosure" open={!mobile || contextExpanded} onToggle={event => { if (mobile) setContextExpanded(event.currentTarget.open); }}><summary><span>追问范围：{lastPlan.kind === 'flow' ? '交还车' : CATEGORY_LABELS[lastPlan.category]}{Object.keys(lastPlan.filters).length ? ` · ${Object.entries(lastPlan.filters).map(([dimension,values]) => `${GROUP_LABELS[dimension as Dimension]} ${values.length === 1 ? values[0] : `${values.length}项`}`).join(' · ')}` : ''}</span><ChevronDown size={15} /></summary><div className="aq-context">
+              <span className="aq-context-heading">当前条件</span>
               <span>
                 {lastPlan.kind === "flow"
                   ? "交退换车"
@@ -847,7 +855,7 @@ export default function AssetAssistant({
                 <Plus size={12} />
                 换个话题
               </button>
-            </div>
+            </div></details>
           )}
           {independent && (
             <p className="aq-topic-notice">
diff --git a/src/modules/assets/assistant/CompoundResultView.tsx b/src/modules/assets/assistant/CompoundResultView.tsx
index 42a39c3..3e9c5ff 100644
--- a/src/modules/assets/assistant/CompoundResultView.tsx
+++ b/src/modules/assets/assistant/CompoundResultView.tsx
@@ -6,6 +6,8 @@ import type {
 } from "../../../shared/assets/assistant";
 import { ResultView, type ResultViewProps } from "./ResultView";
 import { GenerativeResultView } from "./GenerativeResultView";
+import { useMobileLayout } from '../useMobileLayout';
+import { mobileResultSummary } from './mobile-presentation';
 import { copyResultText } from "./result-presentation";
 
 export type CompoundResultViewProps = Omit<
@@ -34,6 +36,7 @@ export function CompoundResultView({
   activate,
   ...props
 }: CompoundResultViewProps) {
+  const mobile = useMobileLayout();
   const [selection, setSelection] = useState<{
     sectionId: string;
     observedActiveId?: string;
@@ -72,7 +75,7 @@ export function CompoundResultView({
     externallyActive ||
     sections[0];
   const selectedIndex = sections.indexOf(selected);
-  const stacked = result.layout === "stack";
+  const stacked = result.layout === "stack" && !mobile;
   const renderSection = (section: typeof selected) => {
     const child = section.result;
     const correction = child?.resultId
@@ -120,11 +123,11 @@ export function CompoundResultView({
         className="aq-compound-heading"
         id={result.resultId ? `aq-query-${result.resultId}` : undefined}
       >
-        <div>
+        <div className="aq-compound-title">
           <strong>{result.title || "综合分析"}</strong>
           <span>{sections.length}项分析</span>
         </div>
-        <p id={result.resultId ? `aq-answer-${result.resultId}` : undefined}>
+        <p className={mobile ? "aq-mobile-compound-summary" : undefined} id={result.resultId ? `aq-answer-${result.resultId}` : undefined}>
           {result.summary}
         </p>
       </header>
@@ -219,7 +222,7 @@ export function CompoundResultView({
                 <span className="aq-section-preview">
                   <strong>{section.title}</strong>
                   <span>
-                    {section.result?.summary || section.error || "本项暂无结果"}
+                    {section.result ? (mobile ? mobileResultSummary(section.result) : section.result.summary) : section.error || "本项暂无结果"}
                   </span>
                 </span>
                 {chosen ? <Check size={14} /> : <ArrowUpRight size={14} />}
diff --git a/src/modules/assets/assistant/GenerativeResultView.tsx b/src/modules/assets/assistant/GenerativeResultView.tsx
index 109e6ba..0cf70c2 100644
--- a/src/modules/assets/assistant/GenerativeResultView.tsx
+++ b/src/modules/assets/assistant/GenerativeResultView.tsx
@@ -45,6 +45,10 @@ import {
   type PresentationDatum,
 } from "./generative-presentation";
 
+import { useMobileLayout } from '../useMobileLayout';
+import { mobileBlockGroups, mobileResultSummary } from './mobile-presentation';
+import { ResultActions } from './ResultActions';
+
 const COLORS = [
   "#4e806a",
   "#527da5",
@@ -69,6 +73,7 @@ function DataTable({
   operate,
   disabled,
 }: DataBlockProps) {
+  const mobile = useMobileLayout();
   const [page, setPage] = useState(0);
   const data = presentationData(result, block.dataset);
   const columns = presentationFields(block);
@@ -78,7 +83,16 @@ function DataTable({
   );
   return (
     <>
-      <div className="aq-table-scroll">
+      {mobile ? <div className="aq-mobile-data-list" aria-label={block.title || '分析数据'}>{data.slice(currentPage * 8, currentPage * 8 + 8).map((row, index) => {
+        const action = presentationAction(interaction, row);
+        const vehicle = block.dataset === 'rows' && columns.some(column => column.field === 'plate');
+        const primary = vehicle ? columns.filter(column => ['plate', 'status', 'event', 'vehicleClass', 'type', 'city'].includes(column.field)) : columns.slice(0, 3);
+        const extra = columns.filter(column => !primary.includes(column));
+        return <article className="aq-mobile-data-row" key={String(row.id ?? row.name ?? row.date ?? row.label ?? index)}>
+          {vehicle ? <><div className="aq-mobile-record-heading"><strong>{presentationValue(row.plate, 'plate')}</strong><span>{primary.filter(column => ['status', 'event'].includes(column.field)).map(column => presentationValue(row[column.field], column.field)).join(' · ')}</span></div><p>{primary.filter(column => !['plate', 'status', 'event'].includes(column.field)).map(column => presentationValue(row[column.field], column.field)).join(' · ')}</p></> : <div className="aq-mobile-data-values">{primary.map(column => <div key={column.field}><span>{column.label}</span><strong>{presentationValue(row[column.field], column.field)}</strong></div>)}</div>}
+          {(extra.length > 0 || action) && <div className="aq-mobile-data-footer">{extra.length > 0 && <details><summary>更多字段</summary><dl>{extra.map(column => <div key={column.field}><dt>{column.label}</dt><dd>{presentationValue(row[column.field], column.field)}</dd></div>)}</dl></details>}{action && <button disabled={disabled} aria-label={`${datumName(row)} · ${interaction!.label}`} onClick={() => operate(action, `${datumName(row)} · ${interaction!.label}`)}>继续分析<ArrowUpRight size={15} /></button>}</div>}
+        </article>;
+      })}</div> : <div className="aq-table-scroll">
         <table>
           <caption className="aq-sr-only">{block.title || "分析数据"}</caption>
           <thead>
@@ -132,7 +146,7 @@ function DataTable({
               })}
           </tbody>
         </table>
-      </div>
+      </div>}
       {data.length > 8 && (
         <div className="aq-generated-pagination">
           <span>
@@ -159,6 +173,7 @@ function DataTable({
   );
 }
 function DataChart(props: DataBlockProps) {
+  const mobile = useMobileLayout();
   const { block, result, interaction, operate, disabled } = props;
   const [expanded, setExpanded] = useState(false);
   const allData = presentationData(result, block.dataset);
@@ -186,6 +201,15 @@ function DataChart(props: DataBlockProps) {
   };
   if (!series.length) return <DataTable {...props} />;
   const common = { data, margin: { top: 8, right: 16, bottom: 0, left: 0 } };
+  if (mobile && (block.chart === 'bar' || (block.chart === 'donut' && block.dataset === 'groups')) && series.length === 1 && allData.every(row => typeof row[series[0].field] === 'number' && Number(row[series[0].field]) >= 0)) {
+    const field = series[0].field;
+    const max = Math.max(1, ...allData.map(row => typeof row[field] === 'number' ? Math.abs(row[field] as number) : 0));
+    return <div className="aq-mobile-ranking" aria-label={block.title || '分组图表'}>{(expanded ? allData : allData.slice(0, 5)).map((row, index) => {
+      const action = presentationAction(interaction, row);
+      const content = <><span className="aq-mobile-ranking-line"><span>{datumName(row)}</span><strong>{presentationValue(row[field], field)}</strong>{action && <ArrowUpRight size={15} />}</span><span className="aq-mobile-ranking-track"><span style={{ width: `${Math.abs(Number(row[field]) || 0) / max * 100}%` }} /></span></>;
+      return action ? <button key={index} disabled={disabled} aria-label={`${datumName(row)} · ${interaction!.label}`} onClick={() => explore(row)}>{content}</button> : <div className="aq-mobile-ranking-item" key={index}>{content}</div>;
+    })}{allData.length > 5 && <button className="aq-generated-expand" onClick={() => setExpanded(!expanded)}>{expanded ? '收起分组' : `查看全部 ${allData.length} 项`}</button>}</div>;
+  }
   return (
     <>
       <div
@@ -294,7 +318,7 @@ function DataChart(props: DataBlockProps) {
               : `当前展示前5项 · 查看全部${allData.length}项`}
           </button>
         )}
-      <details className="aq-generated-data">
+      {!mobile && <details className="aq-generated-data">
         <summary>查看图表数据</summary>
         <DataTable
           {...props}
@@ -309,7 +333,7 @@ function DataChart(props: DataBlockProps) {
             ],
           }}
         />
-      </details>
+      </details>}
     </>
   );
 }
@@ -319,6 +343,9 @@ function Block({
   operate,
   disabled,
 }: Omit<DataBlockProps, "interaction">) {
+  const mobile = useMobileLayout();
+  const [expandedMetrics, setExpandedMetrics] = useState(false);
+  const metrics = presentationMetrics(result, block.metrics);
   const interaction = result.presentation?.interactions.find(
     (item) => item.id === block.interactionId,
   );
@@ -345,8 +372,8 @@ function Block({
       ) : block.kind === "narrative" ? (
         <p className="aq-generated-narrative">{block.text}</p>
       ) : block.kind === "metrics" ? (
-        <div className="aq-generated-metrics">
-          {presentationMetrics(result, block.metrics).map((metric) => (
+        <><div className="aq-generated-metrics">
+          {(mobile && !expandedMetrics ? metrics.slice(0, 4) : metrics).map((metric) => (
             <div key={metric.label}>
               <span>{metric.label}</span>
               <strong>
@@ -355,10 +382,10 @@ function Block({
               </strong>
             </div>
           ))}
-        </div>
+        </div>{mobile && metrics.length > 4 && <button className="aq-generated-expand" onClick={() => setExpandedMetrics(!expandedMetrics)}>{expandedMetrics ? '收起指标' : `其余 ${metrics.length - 4} 项指标`}</button>}</>
       ) : (
         <>
-          {interaction && (
+          {interaction && !mobile && (
             <p className="aq-generated-interaction">
               点击{block.dataset === "daily" ? "日期" : "数据项"} →{" "}
               {interaction.label}
@@ -391,6 +418,12 @@ function Block({
   );
 }
 
+function MobileDataBlock({ block, table, ...props }: Omit<DataBlockProps, 'interaction'> & { table?: PresentationBlock }) {
+  const [view, setView] = useState<'chart' | 'table'>('chart');
+  const tableBlock: PresentationBlock = table || { ...block, kind: 'table', columns: block.columns || [{ field: block.dataset === 'daily' ? 'date' : block.dataset === 'comparison' ? 'label' : 'name', label: block.dataset === 'daily' ? '日期' : '分组' }, ...presentationSeries(block)] };
+  return <section className="aq-mobile-visual"><div className="aq-mobile-visual-header"><h4>{block.title || '数据分析'}</h4><div aria-label="图表与明细"><button aria-pressed={view === 'chart'} onClick={() => setView('chart')}>图表</button><button aria-pressed={view === 'table'} onClick={() => setView('table')}>明细</button></div></div><Block {...props} block={{ ...(view === 'chart' ? block : tableBlock), title: undefined }} /></section>;
+}
+
 function GenerativeResultViewContent({
   result,
   operate,
@@ -403,6 +436,7 @@ function GenerativeResultViewContent({
   correctionResultId,
   showCorrection,
 }: ResultViewProps) {
+  const mobile = useMobileLayout();
   const [noticeByResult, setNoticeByResult] = useState<{
     key: string;
     text: string;
@@ -536,7 +570,7 @@ function GenerativeResultViewContent({
           已纠正上一条回答：{result.correction.message}
         </p>
       )}
-      {presentation.title && (
+      {!mobile && presentation.title && (
         <h3 className="aq-generated-title">{presentation.title}</h3>
       )}
       {result.outcome === "empty" && (
@@ -552,15 +586,11 @@ function GenerativeResultViewContent({
       {result.outcome === "unsupported" && (
         <p className="aq-generated-notice">本次需求暂不能完整生成。</p>
       )}
-      {presentation.blocks.map((block) => (
-        <Block
-          key={block.id}
-          block={block}
-          result={result}
-          operate={operate}
-          disabled={disabled || !!correctionMessage}
-        />
-      ))}
+      {mobile ? <>
+        <p className="aq-answer aq-mobile-lead" id={result.resultId ? `aq-answer-${result.resultId}` : undefined}>{mobileResultSummary(result)}</p>
+        {mobileBlockGroups(presentation.blocks).filter(({ block }) => block.kind !== 'summary' && block.kind !== 'narrative').map(({ block, table }) => block.kind === 'chart' ? <MobileDataBlock key={block.id} block={block} table={table} result={result} operate={operate} disabled={disabled || !!correctionMessage} /> : <Block key={block.id} block={block} result={result} operate={operate} disabled={disabled || !!correctionMessage} />)}
+        <details className="aq-secondary-details"><summary>分析说明</summary><p>{result.summary}</p>{presentation.blocks.filter(block => (block.kind === 'summary' || block.kind === 'narrative') && block.text && block.text !== result.summary).map(block => <p key={block.id}>{block.text}</p>)}</details>
+      </> : presentation.blocks.map((block) => <Block key={block.id} block={block} result={result} operate={operate} disabled={disabled || !!correctionMessage} />)}
       {!!result.unanswered?.length && (
         <div className="aq-compound-unanswered">
           <strong>尚未回答</strong>
@@ -611,7 +641,12 @@ function GenerativeResultViewContent({
           {result.contextNote && <p>{result.contextNote}</p>}
           <p>来源：{result.source}</p>
         </details>
-        <div className="aq-answer-actions">
+        <ResultActions primary={<button
+            disabled={disabled || active || !!correctionMessage}
+            onClick={activate}
+          >
+            {mobile ? (active ? "当前追问范围" : "继续追问") : (active ? "正在基于此结果追问" : "基于此结果追问")}
+          </button>}>
           <button
             disabled={disabled || saving}
             onClick={() => void save("export")}
@@ -619,12 +654,7 @@ function GenerativeResultViewContent({
             <ArrowDownToLine size={14} />
             导出明细
           </button>
-          <button
-            disabled={disabled || active || !!correctionMessage}
-            onClick={activate}
-          >
-            {active ? "正在基于此结果追问" : "基于此结果追问"}
-          </button>
+
           <button
             disabled={saving || flagged}
             onClick={() => void save("feedback")}
@@ -642,7 +672,7 @@ function GenerativeResultViewContent({
             <Copy size={14} />
             复制完整结果
           </button>
-        </div>
+        </ResultActions>
         {notice && (
           <p className="aq-notice" role="status">
             {notice}
diff --git a/src/modules/assets/assistant/ResultActions.tsx b/src/modules/assets/assistant/ResultActions.tsx
new file mode 100644
index 0000000..b2f3bce
--- /dev/null
+++ b/src/modules/assets/assistant/ResultActions.tsx
@@ -0,0 +1,8 @@
+import type { ReactNode } from 'react';
+import { MoreHorizontal } from 'lucide-react';
+import { useMobileLayout } from '../useMobileLayout';
+
+export function ResultActions({ children, primary }: { children: ReactNode; primary?: ReactNode }) {
+  const mobile = useMobileLayout();
+  return mobile ? <div className="aq-mobile-actions">{primary}<details className="aq-more-actions"><summary><MoreHorizontal size={18} />更多</summary><div className="aq-answer-actions">{children}</div></details></div> : <div className="aq-answer-actions">{primary}{children}</div>;
+}
diff --git a/src/modules/assets/assistant/ResultView.tsx b/src/modules/assets/assistant/ResultView.tsx
index dc266f0..000948e 100644
--- a/src/modules/assets/assistant/ResultView.tsx
+++ b/src/modules/assets/assistant/ResultView.tsx
@@ -26,7 +26,12 @@ import {
   compactAnalysisPath,
 } from "./result-presentation";
 
+import { useMobileLayout } from '../useMobileLayout';
+import { mobileResultSummary } from './mobile-presentation';
+import { ResultActions } from './ResultActions';
+
 function Records({ rows, flow }: { rows: AssistantRow[]; flow: boolean }) {
+  const mobile = useMobileLayout();
   const [page, setPage] = useState(0),
     [search, setSearch] = useState("");
   const filtered = rows.filter((r) =>
@@ -52,7 +57,7 @@ function Records({ rows, flow }: { rows: AssistantRow[]; flow: boolean }) {
         </label>
         <span>{filtered.length}条</span>
       </div>
-      <div className="aq-table-scroll">
+      {mobile ? <div className="aq-mobile-data-list" aria-label="车辆明细">{filtered.slice(current * 8, current * 8 + 8).map(r => <article className="aq-mobile-data-row" key={r.id}><div className="aq-mobile-record-heading"><strong>{r.plate || '未登记车牌'}</strong><span>{flow ? r.event : r.status}</span></div><p>{r.type} · {r.city || '未标注城市'}</p><details><summary>更多资料</summary><dl>{[['型号', r.model], ['部门', r.department], ...(flow ? [['日期', r.date]] : [['库存子集', r.abnormal ? '异动' : r.pending ? '待交车' : '—'], ['异动类型', r.abnormalType], ['预计完成时间', r.targetCompletionTime]])].map(([label,value]) => <div key={label}><dt>{label}</dt><dd>{value || '—'}</dd></div>)}</dl></details></article>)}</div> : <div className="aq-table-scroll">
         <table>
           <thead>
             <tr>
@@ -90,7 +95,7 @@ function Records({ rows, flow }: { rows: AssistantRow[]; flow: boolean }) {
             ))}
           </tbody>
         </table>
-      </div>
+      </div>}
       {!filtered.length && <p className="aq-no-data">没有符合条件的明细</p>}
       <div className="aq-pagination">
         <span>
@@ -148,6 +153,7 @@ function ResultViewContent({
   showCorrection,
   display: preferredDisplay,
 }: ResultViewProps) {
+  const mobile = useMobileLayout();
   const [expandedGroupResult, setExpandedGroupResult] = useState<string | null>(
       null,
     ),
@@ -360,7 +366,7 @@ function ResultViewContent({
         className="aq-answer"
         id={result.resultId ? `aq-answer-${result.resultId}` : undefined}
       >
-        {result.summary}
+        {mobile ? mobileResultSummary(result) : result.summary}
       </p>
       {!result.conciseCount && !!visibleMetrics.length && (
         <div className="aq-metrics aq-primary-metrics">
@@ -790,6 +796,8 @@ function ResultViewContent({
                       点击分组继续下钻 · 筛选条件自动用于下一次追问
                     </p>
                   </div>
+                ) : mobile ? (
+                  <div className="aq-mobile-data-list" aria-label="分组明细">{result.groups.map(g => <article className="aq-mobile-data-row" key={JSON.stringify(g.keys)}><div className="aq-mobile-data-values"><div><span>分组</span><strong>{g.name}</strong></div><div><span>车辆数</span><strong>{g.count}</strong></div><div><span>占比</span><strong>{g.share == null ? '—' : `${g.share}%`}</strong></div></div><div className="aq-mobile-data-footer">{plan.category !== 'operating' && <details><summary>更多指标</summary><p>运营率 {g.rate}% · 异动 {g.abnormal ?? '—'} · 待交车 {g.pending ?? '—'}</p></details>}<button disabled={disabled || !Object.keys(g.keys || {}).length} aria-label={`下钻${g.name}`} onClick={() => run({ type: 'drill', keys: g.keys || {} }, `下钻${g.name}`)}>继续分析<ArrowUpRight size={15} /></button></div></article>)}</div>
                 ) : (
                   <div className="aq-table-scroll">
                     <table>
@@ -859,6 +867,7 @@ function ResultViewContent({
           <summary>
             统计口径、权限与数据时间{result.warning ? " · 有补充说明" : ""}
           </summary>
+          {mobile && <p>{result.summary}</p>}
           <p>
             公司：{scope.company} · 权限：{scope.permission}
           </p>
@@ -877,7 +886,14 @@ function ResultViewContent({
           ))}
           <p>来源：{result.source}</p>
         </details>
-        <div className="aq-answer-actions">
+        <ResultActions primary={plan.kind !== "clarify" && (
+            <button
+              disabled={disabled || active || !!correctionMessage}
+              onClick={activate}
+            >
+              {mobile ? (active ? "当前追问范围" : "继续追问") : (active ? "正在基于此结果追问" : "基于此结果追问")}
+            </button>
+          )}>
           {plan.kind !== "clarify" && (!result.conciseCount || result.metrics[0]?.value > 0) && (
             <button
               disabled={disabled || saving}
@@ -888,14 +904,7 @@ function ResultViewContent({
               导出明细
             </button>
           )}
-          {plan.kind !== "clarify" && (
-            <button
-              disabled={disabled || active || !!correctionMessage}
-              onClick={activate}
-            >
-              {active ? "正在基于此结果追问" : "基于此结果追问"}
-            </button>
-          )}
+
           <button disabled={saving || flagged} onClick={() => void flag()}>
             {flagged ? "已记录" : "未解决我的问题"}
           </button>
@@ -910,7 +919,7 @@ function ResultViewContent({
             <Copy size={14} />
             复制完整结果
           </button>
-        </div>
+        </ResultActions>
         {notice && (
           <p className="aq-notice" role="status">
             {notice}
diff --git a/src/modules/assets/assistant/ThinkingState.tsx b/src/modules/assets/assistant/ThinkingState.tsx
index bb7e1ef..7644211 100644
--- a/src/modules/assets/assistant/ThinkingState.tsx
+++ b/src/modules/assets/assistant/ThinkingState.tsx
@@ -3,6 +3,8 @@
 import { useEffect, useId, useState } from "react";
 import { Check, ChevronDown, CircleAlert, LoaderCircle, Pause, Sparkles } from "lucide-react";
 
+import { useMobileLayout } from '../useMobileLayout';
+
 export function ThinkingState({
   steps,
   working,
@@ -18,6 +20,7 @@ export function ThinkingState({
   stopped?: boolean;
   outcome?: string;
 }) {
+  const mobile = useMobileLayout();
   const traceId = useId();
   const [manualExpanded, setExpanded] = useState<boolean | null>(null);
   const [elapsed, setElapsed] = useState(0);
@@ -28,7 +31,7 @@ export function ThinkingState({
     const timer = window.setInterval(update, 1000);
     return () => window.clearInterval(timer);
   }, [working, started]);
-  const expanded = manualExpanded ?? working;
+  const expanded = manualExpanded ?? (working && !mobile);
   const StatusIcon = working ? LoaderCircle : stopped ? Pause : failed ? CircleAlert : Sparkles;
   return (
     <div className={`aq-thinking${working ? " aq-thinking-working" : ""}`} data-state={working ? "working" : stopped ? "stopped" : failed ? "failed" : "complete"}>
@@ -41,7 +44,7 @@ export function ThinkingState({
         <StatusIcon size={16} className={working ? "aq-spin" : ""} aria-hidden="true" />
         <span className={`aq-thinking-title${working ? " aq-shimmer" : ""}`}>
           {working
-            ? "正在分析"
+            ? (mobile ? steps.at(-1) || "正在分析" : "正在分析")
             : stopped
               ? "已由用户停止"
               : failed
diff --git a/src/modules/assets/assistant/mobile-assistant.css b/src/modules/assets/assistant/mobile-assistant.css
new file mode 100644
index 0000000..7963eea
--- /dev/null
+++ b/src/modules/assets/assistant/mobile-assistant.css
@@ -0,0 +1,122 @@
+/* Mobile presentation only. Keep desktop analysis density unchanged. */
+.aq-context-disclosure > summary { display: none; }
+@media (max-width: 767px) {
+  .aq-page { font-size: 14px; }
+  .aq-page .aq-turns { padding: 16px 16px 24px; }
+  .aq-page .aq-result, .aq-page .aq-compound-result { margin-left: 0; }
+  .aq-page .aq-question { margin-bottom: 16px; }
+  .aq-page .aq-question p { font-size: 15px; line-height: 1.65; }
+  .aq-page .aq-thinking { border: 0; border-radius: 8px; padding: 0 8px; margin-bottom: 8px; }
+  .aq-page .aq-thinking > button { font-size: 13px; }
+  .aq-page .aq-thinking-title { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+  .aq-page .aq-thinking-meta { font-size: 12px; }
+  .aq-page .aq-query-heading { position: static; padding: 4px 0 8px; margin-bottom: 10px; }
+  .aq-page .aq-current-path { flex-wrap: wrap; overflow: visible; font-size: 13px; gap: 4px 6px; }
+  .aq-page .aq-current-path > span { flex-shrink: 1; white-space: normal; }
+  .aq-page .aq-current-path > .aq-path-current { position: static; }
+  .aq-page .aq-query-navigation { flex-wrap: wrap; font-size: 12px; }
+  .aq-page .aq-query-navigation > span { font-size: 12px; }
+  .aq-page .aq-query-navigation > button, .aq-page .aq-path-history > summary { min-height: 44px; font-size: 13px; }
+  .aq-page .aq-path-history nav button { min-height: 44px; font-size: 13px; }
+  .aq-page .aq-result .aq-answer { font-size: 15px; line-height: 1.75; margin: 0 0 12px; }
+  .aq-page .aq-generated-block { margin: 12px 0; }
+  .aq-page .aq-generated-block h4 { font-size: 14px; }
+  .aq-page .aq-generated-metrics, .aq-page .aq-primary-metrics,
+  .aq-page .aq-primary-metrics:has(> div:nth-child(4):last-child) { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
+  .aq-page .aq-generated-metrics > div { padding: 10px 12px; border: 0; border-radius: 8px; }
+  .aq-page .aq-generated-metrics span, .aq-page .aq-metrics span { font-size: 13px; line-height: 1.5; }
+  .aq-page .aq-generated-metrics strong, .aq-page .aq-metrics strong { font-size: 26px; margin-top: 3px; }
+  .aq-page .aq-generated-metrics small, .aq-page .aq-metrics small { font-size: 12px; }
+  .aq-page .aq-primary-metrics > div { border: 0; padding: 8px 10px !important; background: var(--aq-inset); border-radius: 8px; }
+  .aq-mobile-visual { margin: 12px 0; border: 1px solid var(--aq-line); border-radius: 10px; padding: 4px 12px 8px; }
+  .aq-mobile-visual-header { display: flex; align-items: center; gap: 8px; justify-content: space-between; }
+  .aq-mobile-visual-header > h4 { font-size: 14px; font-weight: 600; margin: 0; min-width: 0; }
+  .aq-mobile-visual-header > div { display: flex; flex-shrink: 0; gap: 2px; }
+  .aq-mobile-visual-header button { min-height: 44px; min-width: 44px; padding: 5px 6px; font-size: 13px; color: var(--aq-muted); }
+  .aq-mobile-visual-header button[aria-pressed="true"] { color: var(--aq-accent); font-weight: 600; text-decoration: underline; text-underline-offset: 7px; }
+  .aq-mobile-ranking { display: grid; gap: 4px; }
+  .aq-mobile-ranking > button:not(.aq-generated-expand), .aq-mobile-ranking-item { width: 100%; min-height: 48px; display: block; padding: 6px 0; text-align: left; }
+  .aq-mobile-ranking-line { display: flex; gap: 8px; align-items: center; font-size: 14px; line-height: 1.5; }
+  .aq-mobile-ranking-line > span { flex: 1; min-width: 0; overflow-wrap: anywhere; }
+  .aq-mobile-ranking-line > strong { font-variant-numeric: tabular-nums; font-weight: 600; white-space: nowrap; }
+  .aq-mobile-ranking-line > svg { color: var(--aq-muted); }
+  .aq-mobile-ranking-track { display: block; height: 5px; border-radius: 3px; background: var(--aq-inset); margin-top: 6px; overflow: hidden; }
+  .aq-mobile-ranking-track > span { height: 100%; display: block; background: var(--aq-accent); opacity: .65; border-radius: inherit; }
+  .aq-page .aq-generated-expand { min-height: 44px; font-size: 13px; }
+  .aq-mobile-data-list { display: grid; gap: 8px; padding: 4px 0; }
+  .aq-mobile-data-row { min-width: 0; padding: 10px 12px; background: var(--aq-inset); border-radius: 8px; font-size: 14px; line-height: 1.6; }
+  .aq-mobile-data-values { display: grid; grid-template-columns: minmax(0, 1.35fr) repeat(2, minmax(0, 1fr)); gap: 8px; }
+  .aq-mobile-data-values span { display: block; font-size: 12px; color: var(--aq-muted); margin-bottom: 2px; }
+  .aq-mobile-data-values strong { display: block; font-size: 14px; font-weight: 550; overflow-wrap: anywhere; }
+  .aq-mobile-data-values > div:only-child { grid-column: 1 / -1; }
+  .aq-mobile-data-row dl { display: grid; gap: 7px; margin: 8px 0; }
+  .aq-mobile-data-row dl > div { display: grid; grid-template-columns: 80px minmax(0, 1fr); gap: 8px; }
+  .aq-mobile-data-row dt { color: var(--aq-muted); font-size: 13px; }
+  .aq-mobile-data-row dd { margin: 0; overflow-wrap: anywhere; }
+  .aq-mobile-data-footer { display: flex; align-items: flex-start; flex-wrap: wrap; gap: 0 8px; justify-content: space-between; margin-top: 4px; }
+  .aq-mobile-data-footer > details[open] { width: 100%; }
+  .aq-mobile-data-row summary { min-height: 44px; display: flex; align-items: center; cursor: pointer; color: var(--aq-muted); font-size: 13px; }
+  .aq-mobile-data-row summary::after { content: '＋'; margin-left: 8px; }
+  .aq-mobile-data-row details[open] > summary::after { content: '−'; }
+  .aq-mobile-data-footer > button { min-height: 44px; color: var(--aq-accent); font-size: 13px; }
+  .aq-mobile-record-heading { display: flex; gap: 8px; justify-content: space-between; align-items: center; }
+  .aq-mobile-record-heading > strong { white-space: nowrap; font-size: 16px; }
+  .aq-mobile-record-heading > span { font-size: 12px; color: var(--aq-muted); }
+  .aq-mobile-data-row > p { margin: 5px 0 0; color: var(--aq-muted); font-size: 13px; }
+  .aq-page .aq-generated-pagination, .aq-page .aq-pagination { font-size: 12px; padding: 6px 0; }
+  .aq-page .aq-generated-pagination > button, .aq-page .aq-pagination > button { min-width: 44px; min-height: 44px; }
+  .aq-mobile-actions { display: flex; align-items: flex-start; justify-content: space-between; flex-wrap: wrap; gap: 4px 12px; margin: 4px 0 10px; }
+  .aq-mobile-actions > button { min-height: 44px; padding: 4px 0; color: var(--aq-accent); font-size: 13px; }
+  .aq-mobile-actions > button:disabled { opacity: 1; color: var(--aq-muted); cursor: default; }
+  .aq-more-actions > summary { display: flex; align-items: center; gap: 5px; min-height: 44px; cursor: pointer; color: var(--aq-muted); font-size: 13px; }
+  .aq-more-actions[open] { width: 100%; }
+  .aq-more-actions[open] > summary { justify-content: flex-end; }
+  .aq-page .aq-more-actions .aq-answer-actions { margin: 0; display: flex; flex-wrap: wrap; gap: 4px 16px; }
+  .aq-page .aq-more-actions .aq-answer-actions > button { font-size: 13px; min-height: 44px; }
+  .aq-page .aq-more-actions .aq-answer-actions > span { font-size: 12px; }
+  .aq-page .aq-result .aq-result-definitions > summary, .aq-page .aq-result .aq-secondary-details > summary,
+  .aq-page .aq-result .aq-advanced-controls > summary, .aq-page .aq-result .aq-extra-metrics > summary { min-height: 44px; font-size: 13px; line-height: 1.6; display: flex; align-items: center; }
+  .aq-page .aq-result-definitions, .aq-page .aq-generated-narrative { font-size: 14px; line-height: 1.75; }
+  .aq-page .aq-followups { gap: 8px; }
+  .aq-page .aq-followups > span { width: 100%; font-size: 12px; }
+  .aq-page .aq-followups > button { min-height: 44px; font-size: 13px; text-align: left; }
+  .aq-page .aq-generated-drill-targets { max-height: none; overflow: visible; gap: 8px; }
+  .aq-page .aq-generated-drill-targets button { min-height: 44px; font-size: 13px; }
+  .aq-page .aq-result .aq-table-scroll { max-height: none; overflow-y: visible; }
+  .aq-page .aq-table-scroll th, .aq-page .aq-table-scroll td { font-size: 13px; white-space: normal; overflow-wrap: anywhere; padding: 10px 8px; }
+  .aq-page .aq-table-scroll th { position: static; }
+  .aq-page .aq-result .aq-bar-row { min-height: 44px; grid-template-columns: 75px minmax(15px, 1fr) 36px 40px 13px; font-size: 13px !important; gap: 6px !important; }
+  .aq-page .aq-bar-name { white-space: normal; overflow-wrap: anywhere; }
+  .aq-page .aq-result .aq-view-tabs button, .aq-page .aq-result .aq-more { min-height: 44px; font-size: 13px; }
+  .aq-page .aq-record-toolbar input { font-size: 16px; min-height: 44px; }
+  .aq-page .aq-section-preview > strong { font-size: 14px; }
+  .aq-page .aq-section-preview > span { font-size: 13px; }
+  .aq-page .aq-section-overview > button { padding: 10px; }
+  .aq-page .aq-compound-toolbar { font-size: 12px; }
+  .aq-page .aq-compound-toolbar button { min-height: 44px; font-size: 13px; }
+  .aq-page .aq-context-disclosure { margin-bottom: 4px; min-width: 0; }
+  .aq-page .aq-context-disclosure > summary { display: flex; align-items: center; justify-content: space-between; gap: 8px; min-height: 44px; color: var(--aq-muted); font-size: 13px; cursor: pointer; }
+  .aq-context-disclosure > summary::-webkit-details-marker { display: none; }
+  .aq-context-disclosure > summary > span { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
+  .aq-context-disclosure[open] > summary > span { white-space: normal; }
+  .aq-page .aq-context { flex-wrap: wrap; overflow: visible; padding: 4px 0; gap: 6px; max-height: 160px; overflow-y: auto; }
+  .aq-page .aq-context > * { flex-shrink: 1; }
+  .aq-page .aq-context .aq-filter-chip { max-width: 100%; font-size: 13px; overflow-wrap: anywhere; white-space: normal; }
+  .aq-page .aq-context button { min-height: 44px; min-width: 44px; }
+  .aq-page .aq-context .aq-topic-button { padding: 4px 10px; font-size: 13px; }
+  .aq-page .aq-context-heading { font-size: 12px; }
+  .aq-page .aq-composer-area { border-top: 1px solid var(--aq-line); }
+  .aq-page .aq-composer-foot { font-size: 11px; }
+  .aq-page .aq-latest-answer { min-height: 44px; font-size: 13px; }
+}
+@media (max-width: 767px) {
+  .aq-page .aq-header h1 { font-size: 16px; }
+  .aq-page .aq-scope, .aq-page .aq-compound-heading > div > span,
+  .aq-page .aq-section-number, .aq-page .aq-generated-notice,
+  .aq-page .aq-generated-empty, .aq-page .aq-result-unit,
+  .aq-page .aq-chart-caption, .aq-page .aq-bar-share,
+  .aq-page .aq-model, .aq-page .aq-record-toolbar,
+  .aq-page .aq-compound-notice, .aq-page .aq-inline-progress { font-size: 12px; }
+  .aq-page .aq-secondary-details[open] > p { font-size: 14px; line-height: 1.75; margin-bottom: 8px; }
+  .aq-page .aq-mobile-record-heading { flex-wrap: wrap; }
+}
diff --git a/src/modules/assets/assistant/mobile-presentation.test.ts b/src/modules/assets/assistant/mobile-presentation.test.ts
new file mode 100644
index 0000000..8868978
--- /dev/null
+++ b/src/modules/assets/assistant/mobile-presentation.test.ts
@@ -0,0 +1,36 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import type { AssistantResult, PresentationBlock } from '../../../shared/assets/assistant';
+import { mobileBlockGroups, mobileResultSummary } from './mobile-presentation';
+
+const result: AssistantResult = {
+  plan: { kind: 'assets', category: 'inventory', groupBy: 'region', view: 'chart', filters: { type: ['4.5T'] } },
+  title: '库存', summary: '完整说明和统计限制。', source: '资产台账', fetchedAt: '', rows: [],
+  metrics: [{ label: '库存车辆', value: 200, unit: '台' }, { label: '其中异动', value: 8, unit: '台' }],
+  groups: [{ name: '华东', count: 125, share: 62.5, operating: 0, rate: 0 }, { name: '华南', count: 75, share: 37.5, operating: 0, rate: 0 }],
+};
+test('mobile summary preserves computed total and share without adding subset metrics', () => {
+  assert.equal(mobileResultSummary(result), '库存车辆 200 台；华东最多，125 台（62.5%）。');
+  assert.equal(mobileResultSummary({ ...result, groups: [...result.groups].reverse() }), mobileResultSummary(result));
+});
+test('partial, exception, comparison, briefing and simple count answers retain their qualification', () => {
+  for (const outcome of ['partial', 'empty', 'unsupported'] as const) assert.equal(mobileResultSummary({ ...result, outcome }), result.summary);
+  for (const analysis of ['compare', 'exceptions', 'briefing'] as const) assert.equal(mobileResultSummary({ ...result, plan: { ...result.plan, analysis } }), result.summary);
+  assert.equal(mobileResultSummary({ ...result, conciseCount: true }), result.summary);
+  assert.equal(mobileResultSummary({ ...result, metrics: [] }), result.summary);
+});
+test('chart/table toggles only combine identical data and drill semantics; unrelated fields remain reachable', () => {
+  const blocks: PresentationBlock[] = [
+    { id: 'chart', kind: 'chart', dataset: 'groups', interactionId: 'region' },
+    { id: 'table-other', kind: 'table', dataset: 'groups', interactionId: 'type' },
+    { id: 'table', kind: 'table', dataset: 'groups', interactionId: 'region', columns: [{ field: 'pending', label: '待交车' }] },
+    { id: 'rows', kind: 'table', dataset: 'rows' },
+    { id: 'second-chart', kind: 'chart', dataset: 'groups', interactionId: 'region' },
+    { id: 'explanation', kind: 'narrative', text: '统计限制' },
+  ];
+  const grouped = mobileBlockGroups(blocks);
+  assert.equal(grouped[0].table, blocks[2]);
+  assert.equal(grouped.find(entry => entry.block.id === 'second-chart')?.table, undefined);
+  assert.deepEqual(grouped.map(entry => entry.block.id), ['chart', 'table-other', 'rows', 'second-chart', 'explanation']);
+  assert.equal(grouped.flatMap(entry => [entry.block, ...(entry.table ? [entry.table] : [])]).length, blocks.length);
+});
diff --git a/src/modules/assets/assistant/mobile-presentation.ts b/src/modules/assets/assistant/mobile-presentation.ts
new file mode 100644
index 0000000..ebfd819
--- /dev/null
+++ b/src/modules/assets/assistant/mobile-presentation.ts
@@ -0,0 +1,26 @@
+import type { AssistantResult, PresentationBlock } from '../../../shared/assets/assistant';
+
+/** Summarise computed values only; never add totals across independent scopes. */
+export function mobileResultSummary(result: AssistantResult): string {
+  if (result.plan.kind !== 'assets' || (result.outcome && result.outcome !== 'complete') || (result.plan.analysis && result.plan.analysis !== 'distribution') || result.conciseCount) return result.summary;
+  const total = result.metrics.find(metric => metric.unit === '台' && Number.isFinite(metric.value));
+  if (!total) return result.summary;
+  const largest = result.groups.filter(group => Number.isFinite(group.count)).reduce<(typeof result.groups)[number] | undefined>((lead, group) => !lead || group.count > lead.count ? group : lead, undefined);
+  const headline = `${total.label} ${total.value.toLocaleString('zh-CN')} 台`;
+  if (result.groups.length < 2 || !largest || !largest.count) return `${headline}。`;
+  const share = largest.share;
+  return `${headline}；${largest.name}最多，${largest.count.toLocaleString('zh-CN')} 台${typeof share === 'number' && Number.isFinite(share) ? `（${share}%）` : ''}。`;
+}
+
+export type MobileBlockGroup = { block: PresentationBlock; table?: PresentationBlock };
+/** Pair one chart and one table only when they share both data and drill semantics. */
+export function mobileBlockGroups(blocks: PresentationBlock[]): MobileBlockGroup[] {
+  const paired = new Set<string>();
+  const pairs = new Map<string, PresentationBlock>();
+  for (const block of blocks) {
+    if (block.kind !== 'chart' || !block.dataset) continue;
+    const table = blocks.find(candidate => candidate.kind === 'table' && !paired.has(candidate.id) && candidate.dataset === block.dataset && candidate.interactionId === block.interactionId);
+    if (table) { paired.add(table.id); pairs.set(block.id, table); }
+  }
+  return blocks.filter(block => !paired.has(block.id)).map(block => ({ block, table: pairs.get(block.id) }));
+}
diff --git a/src/modules/assets/components/AbnormalVehicleDetails.tsx b/src/modules/assets/components/AbnormalVehicleDetails.tsx
index 087321f..fa45172 100644
--- a/src/modules/assets/components/AbnormalVehicleDetails.tsx
+++ b/src/modules/assets/components/AbnormalVehicleDetails.tsx
@@ -28,7 +28,7 @@ function InventoryVehicleDetails({ vehicles, kind }: DetailsProps & { kind: 'abn
         <p className="mt-1 text-xs text-slate-500">{vehicle.brandLabel || '—'} · {vehicle.type} · {vehicle.location === '其他' ? '对接中' : vehicle.location}</p>
         <dl className="mt-4 space-y-3 text-sm">
           {details(vehicle).map((value, index) => <div key={labels[index]} className="grid grid-cols-[6rem_minmax(0,1fr)] gap-2">
-            <dt className="text-slate-500">{labels[index]}</dt>
+            <dt className="text-slate-500">{pending && index === 1 ? "客户（已脱敏）" : labels[index]}</dt>
             <dd className="whitespace-pre-wrap break-words font-medium text-slate-800 [overflow-wrap:anywhere]"><Blur>{value}</Blur></dd>
           </div>)}
         </dl>
diff --git a/src/modules/assets/components/FlowAnalysisModal.tsx b/src/modules/assets/components/FlowAnalysisModal.tsx
index 4281de3..ec5c92d 100644
--- a/src/modules/assets/components/FlowAnalysisModal.tsx
+++ b/src/modules/assets/components/FlowAnalysisModal.tsx
@@ -1,4 +1,4 @@
-import { useCallback, useMemo, useRef, useState, type Dispatch, type SetStateAction } from 'react';
+import { useCallback, useLayoutEffect, useMemo, useRef, useState, type Dispatch, type SetStateAction } from 'react';
 import { ArrowLeft, X } from 'lucide-react';
 import type { FlowDetailItem, FlowType } from '../api';
 import type { FlowSelection } from '../model';
@@ -12,6 +12,10 @@ import { AnalysisExportButton } from './analysis/AnalysisExportButton';
 import { downloadAnalysisWorkbook, statisticsExportRows } from '../analysis-export';
 import './analysis/asset-analysis.css';
 import './flow-analysis-modal.css';
+import './analysis/mobile-analysis.css';
+import { MobileAnalysisControls } from './analysis/MobileAnalysisControls';
+import { MobileGroupedTable } from './analysis/MobileGroupedTable';
+import { useMobileLayout } from '../useMobileLayout';
 
 interface FlowAnalysisModalProps {
   selectedFlow: FlowSelection | null;
@@ -58,6 +62,7 @@ export function FlowAnalysisModal(props: FlowAnalysisModalProps) {
 }
 
 function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlow }: Omit<FlowAnalysisModalProps, 'selectedFlow'> & { selectedFlow: FlowSelection }) {
+  const mobile = useMobileLayout();
   const [dimensions, setDimensions] = useState<Dimension[]>(['date']);
   const [mergeParents, setMergeParents] = useState(true);
   const mergeActive = mergeParents && dimensions.length > 1;
@@ -87,6 +92,9 @@ function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlo
   const detailGroup = useMemo(() => detailKey === null ? null : groups.find(group => group.key === detailKey), [groups, detailKey]);
   const detailRows = detailGroup?.rows ?? EMPTY_FLOW_ROWS;
   const showDetails = detailKey !== null;
+  const overviewScroll = useRef(0);
+  const openDetails = (key: string) => { overviewScroll.current = scrollRoot.current?.scrollTop || 0; setDetailKey(key); };
+  useLayoutEffect(() => { if (scrollRoot.current) scrollRoot.current.scrollTop = showDetails ? 0 : overviewScroll.current; }, [showDetails]);
   const detailLabel = detailGroup && dimensions.length ? detailGroup.values.map((value, i) => `${DIMENSION_LABELS[dimensions[i]]}：${dimensionLabel(dimensions[i], value)}`).join(' · ') : '当前筛选范围';
   const selectedRows = showDetails ? detailRows : filteredRows;
   const { replacedCount, departmentCount } = useMemo(() => ({
@@ -96,7 +104,7 @@ function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlo
   const rangeLabel = 'date' in selectedFlow ? selectedFlow.date : `${selectedFlow.start} 至 ${selectedFlow.end}`;
   const parentTotals = useMemo(() => mergeActive ? dimensionParentTotals(groups, dimensions.length, group => group.values, group => group.rows.length) : [], [groups, dimensions.length, mergeActive]);
   const childCounts = useMemo(() => mergeActive ? dimensionChildCounts(groups, dimensions.length, group => group.values) : [], [groups, dimensions.length, mergeActive]);
-  const groupProgress = useProgressiveRows({ total: groups.length, rootRef: scrollRoot, resetKey: groups, enabled: !showDetails });
+  const groupProgress = useProgressiveRows({ total: groups.length, rootRef: scrollRoot, resetKey: groups, enabled: !showDetails, preserveOnDisable: true });
   const detailProgress = useProgressiveRows({ total: detailRows.length, rootRef: scrollRoot, resetKey: detailRows, enabled: showDetails });
   const shownGroups = useMemo(() => groups.slice(0, groupProgress.visibleCount), [groups, groupProgress.visibleCount]);
   const completeSpans = useMemo(() => mergeActive ? dimensionRowSpans(groups, dimensions.length, group => group.values) : [], [groups, dimensions.length, mergeActive]);
@@ -124,19 +132,19 @@ function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlo
   return <div className="bi-flow-modal-backdrop" onClick={event => { if (event.target === event.currentTarget) close(); }}>
     <div ref={dialog} role="dialog" aria-modal="true" aria-labelledby="bi-flow-modal-title" tabIndex={-1} className="bi-flow-modal" data-testid="asset-flow-analysis-modal">
       <header className="bi-flow-modal-header">
-        <div className="bi-flow-modal-header-row"><div><h3 id="bi-flow-modal-title">{FLOW_META[selectedFlow.type].label}分析</h3><p>{rangeLabel} · 运维签章时间 · 车次</p></div><button type="button" aria-label="关闭交还车分析" onClick={close} className="bi-flow-modal-close"><X size={16} /></button></div>
-        <p className="bi-flow-modal-definition">交车包含替换交车；业务类型按实际记录拆分，同车多笔业务分别计次。</p>
+        <div className="bi-flow-modal-header-row">{mobile && <button className="bi-flow-mobile-back" aria-label={showDetails ? "返回交还车统计" : "返回资产管理"} onClick={() => showDetails ? setDetailKey(null) : close()}><ArrowLeft size={20} /></button>}<div><h3 id="bi-flow-modal-title">{FLOW_META[selectedFlow.type].label}分析</h3><p>{rangeLabel} · 运维签章时间 · 车次</p></div><button type="button" aria-label="关闭交还车分析" onClick={close} className="bi-flow-modal-close"><X size={16} /></button></div>
+        {!mobile && <p className="bi-flow-modal-definition">交车包含替换交车；业务类型按实际记录拆分，同车多笔业务分别计次。</p>}
       </header>
 
       <div ref={scrollRoot} className="bi-flow-modal-body">
-        {!showDetails ? <div className="bi-flow-modal-controls">
+        {!mobile && (!showDetails ? <div className="bi-flow-modal-controls">
           <div className="bi-flow-modal-control-row"><span className="bi-flow-modal-control-label">分析维度</span><div className="adp-row" role="group" aria-label="选择交还车统计维度">
             {DIMENSIONS.map(({ key, label }) => <DimensionPicker key={key} label={label} grouped={dimensions.includes(key)} order={dimensions.indexOf(key) + 1} options={filterOptions[key]} selectedValues={filters[key]} onToggleGroup={() => toggleDimension(key)} onApplyFilter={values => changeFilter(key, values)} />)}
             <button type="button" className={`bi-flow-modal-chip${dimensions.length === 0 ? ' bi-flow-modal-chip-active' : ''}`} aria-pressed={dimensions.length === 0} onClick={() => { setDimensions([]); resetResult(); }}>仅筛选</button>
             {activeFilters.length ? <button type="button" className="bi-flow-modal-clear" onClick={() => { setFilters({}); resetResult(); }}>清空筛选</button> : null}
           </div></div>
           <p className="bi-flow-modal-control-hint">点击维度名切换分组，点击右侧箭头筛选；同维度多选为“或”，不同维度为“且”。</p>
-        </div> : <div className="bi-flow-modal-detail-nav"><button type="button" className="bi-flow-modal-back" onClick={() => { setDetailKey(null); }}><ArrowLeft size={13} />返回统计</button><span>{detailLabel}</span></div>}
+        </div> : <div className="bi-flow-modal-detail-nav"><button type="button" className="bi-flow-modal-back" onClick={() => { setDetailKey(null); }}><ArrowLeft size={13} />返回统计</button><span>{detailLabel}</span></div>)}
 
         <div className="bi-flow-modal-summary">
           <div><span>{showDetails ? '当前分组' : '当前筛选'}{FLOW_META[selectedFlow.type].label}</span><strong>{countLabel(selectedRows.length)}<small>车次</small></strong></div>
@@ -144,14 +152,19 @@ function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlo
           {selectedFlow.type === 'delivered' ? <div><span>其中：替换交车</span><strong className="bi-flow-modal-purple">{countLabel(replacedCount)}<small>车次</small></strong></div> : <div><span>{showDetails ? '占当前筛选' : '统计分组'}</span><strong>{showDetails ? `${filteredRows.length ? (selectedRows.length / filteredRows.length * 100).toFixed(1) : '0.0'}%` : groups.length}{!showDetails ? <small>组</small> : null}</strong></div>}
         </div>
 
-        <div className="bi-flow-modal-section-heading"><div><h4>{showDetails ? '业务明细' : dimensions.length ? '组合统计' : '筛选汇总'}</h4><p>{showDetails ? `共 ${countLabel(detailRows.length)} 条业务记录` : `共 ${countLabel(groups.length)} 组 · 占比以当前筛选的 ${countLabel(filteredRows.length)} 车次为基数`}</p></div>
-          {!showDetails && dimensions.length > 1 ? <label className="bi-flow-modal-merge-toggle"><input type="checkbox" checked={mergeParents} onChange={event => { setMergeParents(event.target.checked); }} />合并上级维度</label> : null}
+        {mobile && !showDetails && (filteredRows.length > 0 || activeFilters.length > 0) && <MobileAnalysisControls available={DIMENSIONS.map(d => ({ ...d, options: filterOptions[d.key] }))} dimensions={dimensions} filters={filters} defaults={['date']} apply={(nextDimensions, nextFilters) => { setDimensions(nextDimensions as Dimension[]); setFilters(nextFilters); resetResult(); }} />}
+        {mobile && showDetails && <p className="analysis-mobile-detail-scope">{detailLabel}</p>}
+        <div className="bi-flow-modal-section-heading"><div>{(!mobile || showDetails) && <h4>{showDetails ? '业务明细' : dimensions.length ? '组合统计' : '筛选汇总'}</h4>}<p>{showDetails ? `共 ${countLabel(detailRows.length)} 条业务记录` : mobile ? `共 ${countLabel(groups.length)} 组 · ${countLabel(filteredRows.length)} 车次` : `共 ${countLabel(groups.length)} 组 · 占比以当前筛选的 ${countLabel(filteredRows.length)} 车次为基数`}</p></div>
+          {!mobile && !showDetails && dimensions.length > 1 ? <label className="bi-flow-modal-merge-toggle"><input type="checkbox" checked={mergeParents} onChange={event => { setMergeParents(event.target.checked); }} />合并上级维度</label> : null}
           <div className="analysis-export-actions">
-            <AnalysisExportButton disabled={!selectedRows.length} onExport={exportWorkbook} />
+            {(!mobile || selectedRows.length > 0) && <AnalysisExportButton disabled={!selectedRows.length} onExport={exportWorkbook} />}
           </div>
         </div>
 
         {!showDetails ? groups.length ? <>
+          {mobile ? <MobileGroupedTable dimensions={dimensions.map(d => DIMENSION_LABELS[d])} unit="车次" merged={mergeActive} setMerged={setMergeParents} spans={groupSpans} parentTotals={parentTotals}
+            rows={shownGroups.map(group => ({ key: group.key, label: group.values.map((value, i) => dimensionLabel(dimensions[i], value)).join('、') || '当前筛选范围', values: group.values.map((value, i) => dimensionLabel(dimensions[i], value)), count: group.rows.length, share: group.rows.length / filteredRows.length * 100 }))}
+            onDetails={index => openDetails(shownGroups[index].key)} /> :
           <div className={`bi-flow-modal-table-wrap${mergeActive ? ' is-merged' : ''}`}><table className="bi-flow-modal-table" data-testid="asset-flow-group-table"><thead><tr>{dimensions.length ? dimensions.map(dimension => <th key={dimension}>{DIMENSION_LABELS[dimension]}</th>) : <th>范围</th>}<th className="bi-flow-modal-number">车次</th><th className="bi-flow-modal-share">占比</th><th className="bi-flow-modal-action">操作</th></tr></thead><tbody>
             {shownGroups.map((group, rowIndex) => <tr key={group.key} className={mergeActive && groupSpans[rowIndex][0] > 0 ? 'bi-flow-modal-group-start' : undefined}>
               {dimensions.length ? group.values.map((value, index) => {
@@ -159,16 +172,18 @@ function FlowAnalysisContent({ selectedFlow, selectedFlowDetails, setSelectedFlo
                 return span === 0 ? null : <td key={dimensions[index]} rowSpan={span > 1 ? span : undefined} className={span > 1 ? 'bi-flow-modal-parent-cell' : undefined}>{dimensionLabel(dimensions[index], value)}{mergeActive && index < dimensions.length - 1 && childCounts[rowIndex][index] > 1 && <><small className="bi-flow-modal-parent-total" title="当前筛选范围内该分组的完整合计（全部筛选结果）">合计 <strong>{countLabel(parentTotals[rowIndex][index])}</strong> 车次</small><small className="bi-flow-modal-parent-children" title="当前筛选范围内下一级维度的去重分组数（全部筛选结果）">{DIMENSION_LABELS[dimensions[index + 1]]}：<strong>{countLabel(childCounts[rowIndex][index])}</strong> {dimensionCountUnit(dimensions[index + 1])}</small></>}</td>;
               }) : <td>当前筛选范围</td>}
               <td className="bi-flow-modal-number"><strong>{countLabel(group.rows.length)}</strong></td><td className="bi-flow-modal-share"><div><span className="bi-flow-modal-track"><span className={`bi-flow-modal-fill bi-flow-modal-fill-${selectedFlow.type}`} style={{ width: `${group.rows.length / filteredRows.length * 100}%` }} /></span><span>{(group.rows.length / filteredRows.length * 100).toFixed(1)}%</span></div></td>
-              <td className="bi-flow-modal-action"><button type="button" aria-label={`查看${group.values.map((value, i) => dimensionLabel(dimensions[i], value)).join('、') || '当前筛选范围'}明细`} onClick={() => { setDetailKey(group.key); }}>查看明细</button></td>
+              <td className="bi-flow-modal-action"><button type="button" aria-label={`查看${group.values.map((value, i) => dimensionLabel(dimensions[i], value)).join('、') || '当前筛选范围'}明细`} onClick={() => openDetails(group.key)}>查看明细</button></td>
             </tr>)}
-          </tbody></table></div>
+          </tbody></table></div>}
           <ProgressiveRowsStatus {...groupProgress} unit="组" />
-        </> : <div className="bi-flow-modal-empty">当前筛选范围暂无交还车数据，请调整筛选。</div>
+        </> : <div className="bi-flow-modal-empty">{activeFilters.length ? '当前筛选范围暂无交还车数据，可调整筛选。' : '当前时段暂无交还车记录。'}</div>
           : detailRows.length ? <>
-            <div className="bi-flow-modal-table-wrap" data-testid="asset-flow-final-details"><table className="bi-flow-modal-table bi-flow-modal-detail-table"><thead><tr><th>车牌</th><th>业务类型</th><th>运维签章时间</th><th>建单时间</th><th>部门</th><th>业务负责人</th><th>客户</th><th>合同</th><th>项目名称</th></tr></thead><tbody>{shownDetails.map(item => <tr key={item.id}><td>{item.plateNumber || '未登记车牌'}</td><td>{FLOW_META[item.type].label}</td><td>{item.eventTime || '—'}</td><td>{item.submitTime || '—'}</td><td>{dimensionLabel('department', dimensionValue(item, 'department'))}</td><td>{item.manager || '—'}</td><td>{item.customerName || '—'}</td><td>{item.contractNo || '—'}</td><td>{item.projectName || '—'}</td></tr>)}</tbody></table></div>
+            {mobile ? <div className="analysis-vehicle-cards" data-testid="asset-flow-final-details">{shownDetails.map(item => <article className="analysis-vehicle-card" key={item.id}><header><h4>{item.plateNumber || '未登记车牌'}</h4><span>{FLOW_META[item.type].label}</span></header><p>{item.eventTime || item.date} · {item.department || '未填写部门'}</p><p>{item.customerName || '未填写客户'}</p><details><summary>业务资料</summary><dl>{[['运维签章时间', item.eventTime], ['建单时间', item.submitTime], ['业务负责人', item.manager], ['合同', item.contractNo], ['项目名称', item.projectName]].map(([label,value]) => <div key={label}><dt>{label}</dt><dd>{value || '未提供'}</dd></div>)}</dl></details></article>)}</div> :
+            <div className="bi-flow-modal-table-wrap" data-testid="asset-flow-final-details"><table className="bi-flow-modal-table bi-flow-modal-detail-table"><thead><tr><th>车牌</th><th>业务类型</th><th>运维签章时间</th><th>建单时间</th><th>部门</th><th>业务负责人</th><th>客户</th><th>合同</th><th>项目名称</th></tr></thead><tbody>{shownDetails.map(item => <tr key={item.id}><td>{item.plateNumber || '未登记车牌'}</td><td>{FLOW_META[item.type].label}</td><td>{item.eventTime || '—'}</td><td>{item.submitTime || '—'}</td><td>{dimensionLabel('department', dimensionValue(item, 'department'))}</td><td>{item.manager || '—'}</td><td>{item.customerName || '—'}</td><td>{item.contractNo || '—'}</td><td>{item.projectName || '—'}</td></tr>)}</tbody></table></div>}
             <ProgressiveRowsStatus {...detailProgress} unit="条" />
           </> : <div className="bi-flow-modal-empty">当前分组暂无业务明细，请返回统计调整条件。</div>}
       </div>
+      {mobile && <footer className="analysis-footer"><details><summary>统计口径</summary><p>按运维签章时间统计。交车包含替换交车；同车多笔业务分别计次。仅展示当前可查看范围与筛选条件内的记录。</p></details></footer>}
     </div>
   </div>;
 }
diff --git a/src/modules/assets/components/analysis/AnalysisControls.tsx b/src/modules/assets/components/analysis/AnalysisControls.tsx
index d383004..425051a 100644
--- a/src/modules/assets/components/analysis/AnalysisControls.tsx
+++ b/src/modules/assets/components/analysis/AnalysisControls.tsx
@@ -1,7 +1,9 @@
 import { useEffect, useMemo, useRef, useState } from 'react';
 import { Check, ChevronDown, Filter, Plus, RotateCcw, Search, X } from 'lucide-react';
 import type { AssetAnalysisCell, AssetAnalysisDimension as Dimension } from '../../../../shared/assets/analytics';
-import { ANALYSIS_META, DIMENSION_LABELS, filterCustomCells, getDimensionValueLabel, type AnalysisFilterValues, type AnalysisView } from '../../analytics-model';
+import { ANALYSIS_META, DIMENSION_LABELS, filterCustomCells, getDefaultDimensions, getDimensionValueLabel, type AnalysisFilterValues, type AnalysisView } from '../../analytics-model';
+import { useMobileLayout } from '../../useMobileLayout';
+import { MobileAnalysisControls } from './MobileAnalysisControls';
 
 type Props = {
   view: AnalysisView;
@@ -15,6 +17,7 @@ type Props = {
 };
 
 export function AnalysisControls({ view, cells, available, dimensions, setDimensions, filters, setFilters, reset }: Props) {
+  const mobile = useMobileLayout();
   const root = useRef<HTMLElement>(null);
   const triggerRef = useRef<HTMLButtonElement | null>(null);
   const [position, setPosition] = useState({ top: 0, left: 0 });
@@ -56,6 +59,14 @@ export function AnalysisControls({ view, cells, available, dimensions, setDimens
     if (draft.length) next[editor] = draft; else delete next[editor];
     setFilters(next); closeEditor();
   };
+  const mobileOptions = useMemo(() => mobile ? available.map(key => {
+    const other = { ...filters }; delete other[key];
+    const counts = new Map<string, number>();
+    filterCustomCells(cells, other, metric).forEach(cell => counts.set(cell[key], (counts.get(cell[key]) || 0) + cell.quantity));
+    for (const value of filters[key] || []) if (!counts.has(value)) counts.set(value, 0);
+    return { key, label: DIMENSION_LABELS[key], options: [...counts].map(([value, count]) => ({ value, count, label: getDimensionValueLabel(key, value) })).sort((a, b) => b.count - a.count || a.label.localeCompare(b.label, 'zh-CN')) };
+  }) : [], [mobile, available, cells, filters, metric]);
+  if (mobile) return <MobileAnalysisControls available={mobileOptions} dimensions={dimensions} filters={filters} defaults={getDefaultDimensions(view)} apply={(nextDimensions, nextFilters) => { setDimensions(nextDimensions as Dimension[]); setFilters(nextFilters); }} />;
   return <section ref={root} className="analysis-builder" aria-label="自定义分析设置">
     <div className="analysis-builder-heading"><h3>分析维度</h3><span>点名称组合统计 · 点箭头搜索筛选</span><button className="analysis-reset" onClick={() => { reset(); setEditor(null); }}><RotateCcw size={12} />重置分析</button></div>
     <div className="analysis-dimension-options" role="group" aria-label="选择分析维度">
diff --git a/src/modules/assets/components/analysis/AssetAnalysisModal.tsx b/src/modules/assets/components/analysis/AssetAnalysisModal.tsx
index 1e7be3b..4c33a12 100644
--- a/src/modules/assets/components/analysis/AssetAnalysisModal.tsx
+++ b/src/modules/assets/components/analysis/AssetAnalysisModal.tsx
@@ -1,4 +1,4 @@
-import { useEffect, useMemo, useRef, useState } from 'react';
+import { useEffect, useLayoutEffect, useMemo, useRef, useState } from 'react';
 import { ArrowLeft, BarChart3, Filter, Loader2, Search, X } from 'lucide-react';
 import { fetchJson } from '../../../../auth/api-client';
 import Blur from '../../../../components/Blur';
@@ -15,8 +15,12 @@ import type { VehicleListItem } from '../../types';
 import { AbnormalVehicleDetails, PendingVehicleDetails } from '../AbnormalVehicleDetails';
 import { useDialogFocus } from '../useDialogFocus';
 import { AnalysisExportButton } from './AnalysisExportButton';
+import { MobileAnalysisControls } from './MobileAnalysisControls';
+import { MobileGroupedTable } from './MobileGroupedTable';
 import { downloadAnalysisWorkbook, statisticsExportRows, vehicleExportRows } from '../../analysis-export';
+import { useMobileLayout } from '../../useMobileLayout';
 import './asset-analysis.css';
+import './mobile-analysis.css';
 
 type Props = { selection: VehicleModalSelection | null; subject: string | null; close: () => void };
 const number = (value: number) => value.toLocaleString('zh-CN');
@@ -36,6 +40,7 @@ export function AssetAnalysisModal({ selection, subject, close }: Props) {
 }
 
 function AnalysisDialog({ selection, subject, close }: Props & { selection: VehicleModalSelection }) {
+  const mobile = useMobileLayout();
   const dialog = useRef<HTMLDivElement>(null);
   const scrollRoot = useRef<HTMLDivElement>(null);
   useDialogFocus(true, dialog, close);
@@ -51,6 +56,9 @@ function AnalysisDialog({ selection, subject, close }: Props & { selection: Vehi
   const [mergeParents, setMergeParents] = useState(true);
   const [detailGroup, setDetailGroup] = useState<CustomAnalysisRow | null>(null);
   const showDetails = detailGroup !== null;
+  const overviewScroll = useRef(0);
+  const openDetails = (row: CustomAnalysisRow) => { overviewScroll.current = scrollRoot.current?.scrollTop || 0; setDetailGroup(row); };
+  useLayoutEffect(() => { if (scrollRoot.current) scrollRoot.current.scrollTop = showDetails ? 0 : overviewScroll.current; }, [showDetails]);
   const [vehicles, setVehicles] = useState<VehicleListItem[]>([]);
   const [detailBusy, setDetailBusy] = useState(false);
   const [detailError, setDetailError] = useState('');
@@ -107,7 +115,7 @@ function AnalysisDialog({ selection, subject, close }: Props & { selection: Vehi
     : analysis.rows, [analysis, merged, sort]);
   const parentTotals = useMemo(() => merged ? dimensionParentTotals(orderedGroups, analysis.dimensions.length, row => analysis.dimensions.map(dimension => row.values[dimension] || ''), row => row.count) : [], [orderedGroups, analysis.dimensions, merged]);
   const childCounts = useMemo(() => merged ? dimensionChildCounts(orderedGroups, analysis.dimensions.length, row => analysis.dimensions.map(dimension => row.values[dimension] || '')) : [], [orderedGroups, analysis.dimensions, merged]);
-  const groupProgress = useProgressiveRows({ total: orderedGroups.length, rootRef: scrollRoot, resetKey: orderedGroups, enabled: !showDetails && !busy, batchSize: 40 });
+  const groupProgress = useProgressiveRows({ total: orderedGroups.length, rootRef: scrollRoot, resetKey: orderedGroups, enabled: !showDetails && !busy, batchSize: 40, preserveOnDisable: true });
   const shownGroups = useMemo(() => orderedGroups.slice(0, groupProgress.visibleCount), [orderedGroups, groupProgress.visibleCount]);
   const completeSpans = useMemo(() => merged ? dimensionRowSpans(orderedGroups, analysis.dimensions.length, row => analysis.dimensions.map(dimension => row.values[dimension] || '')) : [], [merged, orderedGroups, analysis.dimensions]);
   const spans = useMemo(() => visibleDimensionRowSpans(completeSpans, groupProgress.visibleCount), [completeSpans, groupProgress.visibleCount]);
@@ -132,17 +140,21 @@ function AnalysisDialog({ selection, subject, close }: Props & { selection: Vehi
   };
   return <div className="asset-analysis-overlay">
     <div ref={dialog} role="dialog" aria-modal="true" aria-label={title} tabIndex={-1} className={`asset-analysis-dialog ${view === 'abnormal' ? 'analysis-amber' : ''}`}>
-      <header className="analysis-header"><div><h2><BarChart3 size={16} />{title}</h2><p>{scopeLabel}</p></div><button type="button" aria-label="关闭统计分析" onClick={close}><X size={18} /></button></header>
-      {busy ? <div className="analysis-message" role="status"><Loader2 className="animate-spin" />正在汇总统计数据…</div> : error ? <div className="analysis-message" role="alert"><p>统计数据加载失败：{error}</p><button className="analysis-button" onClick={() => setRetry(retry + 1)}>重新加载</button></div> : request.kind === 'weekly' ? <WeeklyAnalysis rows={weekly} /> : <>
-        {showDetails && <div className="analysis-navigation"><button className="analysis-back" onClick={() => setDetailGroup(null)}><ArrowLeft size={14} />返回统计分析</button><span className="analysis-detail-scope">{detailGroup.label}</span></div>}
+      {(!mobile || request.kind !== 'weekly' || busy || error) && <header className="analysis-header">{mobile && <button type="button" aria-label={showDetails ? "返回统计分析" : "返回资产管理"} onClick={() => showDetails ? setDetailGroup(null) : close()}><ArrowLeft size={20} /></button>}<div><h2><BarChart3 size={16} />{title}</h2><p>{scopeLabel}</p></div><button type="button" aria-label="关闭统计分析" onClick={close}><X size={18} /></button></header>}
+      {busy ? <div className="analysis-message" role="status"><Loader2 className="animate-spin" />正在汇总统计数据…</div> : error ? <div className="analysis-message" role="alert"><p>统计数据加载失败：{error}</p><button className="analysis-button" onClick={() => setRetry(retry + 1)}>重新加载</button></div> : request.kind === 'weekly' ? <WeeklyAnalysis rows={weekly} title={title} scopeLabel={scopeLabel} close={close} /> : <>
+        {showDetails && !mobile && <div className="analysis-navigation"><button className="analysis-back" onClick={() => setDetailGroup(null)}><ArrowLeft size={14} />返回统计分析</button><span className="analysis-detail-scope">{detailGroup.label}</span></div>}
         <div ref={scrollRoot} className="analysis-scroll">
           {!showDetails && <>
-            <AnalysisControls view={view} cells={data?.cells ?? []} available={available} dimensions={dimensions} setDimensions={updateDimensions} filters={filterValues} setFilters={updateFilters} reset={reset} />
+            {!mobile && <AnalysisControls view={view} cells={data?.cells ?? []} available={available} dimensions={dimensions} setDimensions={updateDimensions} filters={filterValues} setFilters={updateFilters} reset={reset} />}
             <div className="analysis-result-bar" role="status" aria-live="polite"><span>当前结果 <strong>{number(analysis.total)}</strong> 台</span><span>{analysis.rows.length} 个分组</span><span className="analysis-result-dimensions">{analysis.dimensions.length ? analysis.dimensions.map(dimension => DIMENSION_LABELS[dimension]).join(' × ') : '仅汇总，不分组'}</span></div>
             {view === 'inventory' && <div className="analysis-inventory-subsets" aria-label="库存子集统计"><span className="analysis-pending-count">待交车 <strong>{number(analysis.summary.pending)}</strong> 台</span><span className="analysis-abnormal-count">异动 <strong>{number(analysis.summary.abnormal)}</strong> 台</span><small>已包含在当前库存数量中</small></div>}
-            {view === 'abnormal' && <p className="analysis-definition">已异动时长＝统计时间－审批通过时间；区间左含右不含，缺失时间单列。{data && !data.approvalTimeAvailable && ' 当前未取得可用审批时间。'}</p>}
-            <div className="analysis-table-tools"><p>{merged ? '按层级汇总数量排序，相同上级合并展示。' : '筛选分组可继续分析，查看明细可核对车辆。'}</p><div className="analysis-table-options"><AnalysisExportButton disabled={!analysis.total} onExport={exportWorkbook} />{analysis.dimensions.length > 1 && <label className="analysis-merge-toggle"><input type="checkbox" checked={mergeParents} onChange={event => { setMergeParents(event.target.checked); }} />合并上级维度</label>}<label>排序<select aria-label="统计分组排序" value={sort} onChange={event => { setSort(event.target.value as AnalysisSort); }}><option value="count-desc">数量从多到少</option><option value="count-asc">数量从少到多</option><option value="label">维度顺序</option></select></label></div></div>
-            {analysis.total === 0 ? <div className="analysis-message"><BarChart3 size={22} /><h3>没有符合条件的数据</h3><p>移除部分筛选条件，或恢复当前入口的全部数据。</p>{Object.keys(filterValues).length > 0 && <button className="analysis-button" onClick={() => updateFilters({})}>清空筛选</button>}</div> : <>
+            {mobile && (analysis.total > 0 || Object.keys(filterValues).length > 0) && <AnalysisControls view={view} cells={data?.cells ?? []} available={available} dimensions={dimensions} setDimensions={updateDimensions} filters={filterValues} setFilters={updateFilters} reset={reset} />}
+            {!mobile && view === 'abnormal' && <p className="analysis-definition">已异动时长＝统计时间－审批通过时间；区间左含右不含，缺失时间单列。{data && !data.approvalTimeAvailable && ' 当前未取得可用审批时间。'}</p>}
+            <div className={`analysis-table-tools analysis-overview-tools${!analysis.total ? ' is-empty' : ''}`}><p>{merged ? '按层级汇总数量排序，相同上级合并展示。' : '筛选分组可继续分析，查看明细可核对车辆。'}</p><div className="analysis-table-options"><AnalysisExportButton disabled={!analysis.total} onExport={exportWorkbook} />{analysis.dimensions.length > 1 && <label className="analysis-merge-toggle"><input type="checkbox" checked={mergeParents} onChange={event => { setMergeParents(event.target.checked); }} />合并上级维度</label>}<label>排序<select aria-label="统计分组排序" value={sort} onChange={event => { setSort(event.target.value as AnalysisSort); }}><option value="count-desc">数量从多到少</option><option value="count-asc">数量从少到多</option><option value="label">维度顺序</option></select></label></div></div>
+            {analysis.total === 0 ? <div className="analysis-message"><BarChart3 size={22} /><h3>{Object.keys(filterValues).length ? '没有符合条件的数据' : view === 'abnormal' ? '当前无异动车辆' : view === 'pending' ? '当前无待交车辆' : '当前范围暂无车辆'}</h3><p>{Object.keys(filterValues).length ? '可移除筛选条件后重新查看。' : '当前可查看范围内没有相关记录。'}</p>{Object.keys(filterValues).length > 0 && <button className="analysis-button" onClick={() => updateFilters({})}>清空筛选</button>}</div> : <>
+              {mobile ? <MobileGroupedTable dimensions={analysis.dimensions.map(d => DIMENSION_LABELS[d])} unit="台" merged={merged} setMerged={setMergeParents} spans={spans} parentTotals={parentTotals}
+                rows={shownGroups.map(row => ({ key: row.key, label: row.label, values: analysis.dimensions.map(d => <Blur key={d}>{getDimensionValueLabel(d, row.values[d] || '')}</Blur>), count: row.count, share: row.share, note: view === 'inventory' && (row.totals.pending || row.totals.abnormal) ? [row.totals.pending ? `待交 ${row.totals.pending}` : '', row.totals.abnormal ? `异动 ${row.totals.abnormal}` : ''].filter(Boolean).join(' · ') : undefined }))}
+                onDetails={index => openDetails(shownGroups[index])} onFilter={index => narrowToGroup(shownGroups[index])} /> : <>
               <div className={`analysis-group-table${merged ? ' is-merged' : ''}`} role="region" aria-label="组合统计表" tabIndex={0}><table>
                 <thead><tr>{analysis.dimensions.length ? analysis.dimensions.map(dimension => <th key={dimension}>{DIMENSION_LABELS[dimension]}</th>) : <th>统计范围</th>}<th className="analysis-numeric">数量（台）</th>{view === 'inventory' && <><th className="analysis-numeric">待交车</th><th className="analysis-numeric">异动</th></>}<th className="analysis-numeric">占比</th><th>分析操作</th></tr></thead>
                 <tbody>{shownGroups.map((row, rowIndex) => <tr key={row.key} className={merged && spans[rowIndex][0] > 0 ? 'analysis-group-start' : undefined}>
@@ -153,14 +165,15 @@ function AnalysisDialog({ selection, subject, close }: Props & { selection: Vehi
                   <td className="analysis-numeric" data-label="数量（台）"><strong>{number(row.count)}</strong></td>
                   {view === 'inventory' && <><td className={`analysis-numeric ${row.totals.pending ? 'analysis-pending-count' : 'analysis-zero-count'}`} data-label="待交车（台）">{number(row.totals.pending)}</td><td className={`analysis-numeric ${row.totals.abnormal ? 'analysis-abnormal-count' : 'analysis-zero-count'}`} data-label="异动（台）">{number(row.totals.abnormal)}</td></>}
                   <td className="analysis-share-cell" data-label="占比"><span>{row.share.toFixed(1)}%</span><span className="analysis-bar-track" aria-hidden="true"><span style={{ width: `${row.share}%` }} /></span></td>
-                  <td className="analysis-group-actions">{analysis.dimensions.length > 0 && <button aria-label={`筛选分组 ${row.label}`} onClick={() => narrowToGroup(row)}><Filter size={12} />筛选此组</button>}<button aria-label={`查看明细 ${row.label}`} onClick={() => setDetailGroup(row)}>查看明细</button></td>
+                  <td className="analysis-group-actions">{analysis.dimensions.length > 0 && <button aria-label={`筛选分组 ${row.label}`} onClick={() => narrowToGroup(row)}><Filter size={12} />筛选此组</button>}<button aria-label={`查看明细 ${row.label}`} onClick={() => openDetails(row)}>查看明细</button></td>
                 </tr>)}</tbody>
               </table></div>
+              </>}
               <div className="analysis-table-total"><span>合计 {number(analysis.total)} 台{view === 'inventory' && ` · 待交车 ${number(analysis.summary.pending)} 台 · 异动 ${number(analysis.summary.abnormal)} 台`} · 占比基于当前筛选结果</span><span>100%</span></div>
               <ProgressiveRowsStatus {...groupProgress} unit="组" />
             </>}
           </>}
-          {showDetails && <div className="analysis-details">
+          {showDetails && <div className="analysis-details">{mobile && <p className="analysis-mobile-detail-scope">{detailGroup.label} · 当前分组</p>}
             <div className="analysis-table-tools"><h3>车辆明细 <small>{number(visibleVehicles.length)} 台</small></h3><AnalysisExportButton disabled={detailBusy || !!detailError || !visibleVehicles.length} onExport={exportWorkbook} /><label className="analysis-search"><Search size={15} /><input aria-label="搜索车辆明细" placeholder="搜索车牌、VIN、型号、城市" value={search} onChange={event => { setSearch(event.target.value); }} /></label></div>
             {detailBusy ? <div className="analysis-message" role="status"><Loader2 className="animate-spin" />正在加载车辆明细…</div> : detailError ? <div className="analysis-message" role="alert"><p>{detailError}</p><button className="analysis-button" onClick={() => setDetailRetry(detailRetry + 1)}>重新加载明细</button></div> : <>
               {vehicles.length !== detailGroup.count && <p className="analysis-definition">车辆状态可能已更新：统计快照 {detailGroup.count} 台，当前明细 {vehicles.length} 台。</p>}
@@ -169,19 +182,26 @@ function AnalysisDialog({ selection, subject, close }: Props & { selection: Vehi
             </>}
           </div>}
         </div>
-        <footer className="analysis-footer"><span>统计时间 {data ? formatLocalDateTime(new Date(data.generatedAt)) : '—'} · 当前可查看范围</span><span>{showDetails ? '仅展示当前分组与筛选条件内的车辆' : '同维度筛选为“或”，不同维度筛选为“且”'}</span></footer>
+        <footer className="analysis-footer">{mobile ? <details><summary>统计口径与数据时间</summary><p>统计时间 {data ? formatLocalDateTime(new Date(data.generatedAt)) : '—'} · 当前可查看范围</p><p>同维度筛选为“或”，不同维度为“且”。仅展示当前入口与筛选条件内的车辆。</p>{view === 'abnormal' && <p>已异动时长＝统计时间－审批通过时间；区间左含右不含，缺失时间单列。{data && !data.approvalTimeAvailable && ' 当前未取得可用审批时间。'}</p>}</details> : <><span>统计时间 {data ? formatLocalDateTime(new Date(data.generatedAt)) : '—'} · 当前可查看范围</span><span>{showDetails ? '仅展示当前分组与筛选条件内的车辆' : '同维度筛选为“或”，不同维度筛选为“且”'}</span></>}</footer>
       </>}
     </div>
   </div>;
 }
 
 function VehicleRows({ vehicles, inventory = false }: { vehicles: VehicleListItem[]; inventory?: boolean }) {
+  const mobile = useMobileLayout();
   if (!vehicles.length) return <div className="analysis-message">暂无匹配车辆</div>;
   const stateLabel = (vehicle: VehicleListItem) => {
     const operation = ({ '1': '租赁', '2': '自营', '3': '可运营', '4': '待运营' } as Record<string, string>)[vehicle.operationStatus || ''] || vehicle.operationStatus;
     const business = ({ Abnormal: '异动', Pending: '待交车', Inventory: '在库', Operating: '运营中' } as Record<string, string>)[vehicle.status] || vehicle.status;
     return [business, operation].filter(Boolean).join(' · ');
   };
+  if (mobile) return <div className="analysis-vehicle-cards" aria-label="车辆明细列表">{vehicles.map(vehicle => <article className="analysis-vehicle-card" key={vehicle.id}>
+    <header><h4><Blur>{vehicle.plateNumber || vehicle.vin || '未提供'}</Blur></h4><span>{stateLabel(vehicle)}</span></header>
+    <p>{vehicle.model || `${vehicle.brandLabel || '—'} · ${vehicle.type}`} · {vehicle.city || vehicle.location || '未标注城市'}</p>
+    {!inventory && vehicle.customerName && <p><Blur>{vehicle.customerName}</Blur></p>}
+    <details><summary>车辆资料</summary><dl>{[['VIN', vehicle.vin], ['品牌 / 车型', `${vehicle.brandLabel || '—'} · ${vehicle.type}`], ['省份 / 城市', `${vehicle.province || '未标注'} / ${vehicle.city || vehicle.location || '未标注'}`], ...(inventory ? [['运维负责人', vehicle.opsManagers?.trim() || '-']] : [['签约公司', vehicle.orgName], ['部门', vehicle.departmentName], ['业务负责人', vehicle.customerManager]]), ['所属公司', vehicle.subjectOrg]].map(([label, value]) => <div key={label}><dt>{label}</dt><dd><Blur>{value || '未提供'}</Blur></dd></div>)}</dl></details>
+  </article>)}</div>;
   return <div className="analysis-detail-table" tabIndex={0} role="region" aria-label="车辆明细表"><table><thead><tr>{['车牌 / VIN', '品牌 / 车型 / 型号', '省份 / 城市', '状态', ...(inventory ? ['运维负责人'] : ['客户 / 签约公司', '部门 / 业务负责人']), '所属公司'].map(label => <th key={label}>{label}</th>)}</tr></thead><tbody>{vehicles.map(vehicle => <tr key={vehicle.id}><td><Blur>{vehicle.plateNumber || vehicle.vin || '未提供'}</Blur></td><td>{vehicle.brandLabel || '—'} · {vehicle.type}<small>{vehicle.model}</small></td><td>{vehicle.province || '未标注'} / {vehicle.city || vehicle.location || '未标注'}</td><td>{stateLabel(vehicle)}</td>{inventory ? <td><Blur>{vehicle.opsManagers?.trim() || '-'}</Blur></td> : <><td><Blur>{vehicle.customerName || '—'}</Blur><small><Blur>{vehicle.orgName || '—'}</Blur></small></td><td><Blur>{vehicle.departmentName || '—'}</Blur><small><Blur>{vehicle.customerManager || '—'}</Blur></small></td></>}<td>{vehicle.subjectOrg || '—'}</td></tr>)}</tbody></table></div>;
 }
 
@@ -191,7 +211,8 @@ const EMPTY_WEEKLY_ROWS: WeeklyDetailItem[] = [];
 const weeklyDimensionValue = (row: WeeklyDetailItem, dimension: WeeklyDimension) => dimension === 'date'
   ? row.handover_date?.slice(0, 10) || '' : row.contract_type?.trim() || '';
 
-function WeeklyAnalysis({ rows }: { rows: WeeklyDetailItem[] }) {
+function WeeklyAnalysis({ rows, title, scopeLabel, close }: { rows: WeeklyDetailItem[]; title: string; scopeLabel: string; close: () => void }) {
+  const mobile = useMobileLayout();
   type Dimension = WeeklyDimension;
   const dimensionsAvailable = WEEKLY_DIMENSIONS;
   const scrollRoot = useRef<HTMLDivElement>(null);
@@ -222,12 +243,15 @@ function WeeklyAnalysis({ rows }: { rows: WeeklyDetailItem[] }) {
   const detailGroup = detailKey === null ? null : grouped.get(detailKey);
   const detailRows = detailGroup?.rows ?? EMPTY_WEEKLY_ROWS;
   const showDetails = detailKey !== null;
+  const overviewScroll = useRef(0);
+  const openDetails = (key: string) => { overviewScroll.current = scrollRoot.current?.scrollTop || 0; setDetailKey(key); };
+  useLayoutEffect(() => { if (scrollRoot.current) scrollRoot.current.scrollTop = showDetails ? 0 : overviewScroll.current; }, [showDetails]);
   const groupLabel = (group: { values: string[] }) => dimensions.length
     ? dimensions.map((dimension, index) => `${labels[dimension]}：${label(dimension, group.values[index])}`).join(' · ')
     : '当前筛选结果';
   const parentTotals = useMemo(() => mergeActive ? dimensionParentTotals(groups, dimensions.length, group => group.values, group => group.rows.length) : [], [groups, dimensions.length, mergeActive]);
   const childCounts = useMemo(() => mergeActive ? dimensionChildCounts(groups, dimensions.length, group => group.values) : [], [groups, dimensions.length, mergeActive]);
-  const groupProgress = useProgressiveRows({ total: groups.length, rootRef: scrollRoot, resetKey: groups, enabled: !showDetails });
+  const groupProgress = useProgressiveRows({ total: groups.length, rootRef: scrollRoot, resetKey: groups, enabled: !showDetails, preserveOnDisable: true });
   const detailProgress = useProgressiveRows({ total: detailRows.length, rootRef: scrollRoot, resetKey: detailRows, enabled: showDetails });
   const shownGroups = useMemo(() => groups.slice(0, groupProgress.visibleCount), [groups, groupProgress.visibleCount]);
   const completeSpans = useMemo(() => mergeActive ? dimensionRowSpans(groups, dimensions.length, group => group.values) : [], [groups, dimensions.length, mergeActive]);
@@ -256,6 +280,25 @@ function WeeklyAnalysis({ rows }: { rows: WeeklyDetailItem[] }) {
     const details = selectedRows.map(row => ({ 车牌: row.plate_number, 日期: row.handover_date, 合同类型: row.contract_type, 客户: row.customer_name }));
     return downloadAnalysisWorkbook(statistics, details, `交还车分析-${detailGroup ? groupLabel(detailGroup) : '当前筛选结果'}`);
   };
+  if (mobile) return <>
+    <header className="analysis-header"><button aria-label={showDetails ? '返回统计分析' : '返回资产管理'} onClick={() => showDetails ? setDetailKey(null) : close()}><ArrowLeft size={20} /></button><div><h2>{title}</h2><p>{scopeLabel}</p></div><button aria-label="关闭统计分析" onClick={close}><X size={18} /></button></header>
+    <div ref={scrollRoot} className="analysis-scroll">
+      <div className="analysis-result-bar" role="status"><span>当前结果 <strong>{number(showDetails ? detailRows.length : filtered.length)}</strong> 车次</span>{!showDetails && <span>{groups.length} 个分组</span>}</div>
+      {!showDetails ? <>
+        {(filtered.length > 0 || activeFilters.length > 0) && <MobileAnalysisControls available={dimensionsAvailable.map(key => ({ key, label: labels[key], options: filterOptions[key] }))} dimensions={dimensions} filters={filters} defaults={['date']} apply={(nextDimensions, nextFilters) => { updateDimensions(nextDimensions as Dimension[]); updateFilters(nextFilters); }} />}
+        {filtered.length > 0 && <div className="analysis-table-tools"><AnalysisExportButton onExport={exportWorkbook} /></div>}
+        {groups.length ? <><MobileGroupedTable dimensions={dimensions.map(d => labels[d])} unit="车次" merged={mergeActive} setMerged={setMergeParents} spans={groupSpans} parentTotals={parentTotals}
+          rows={shownGroups.map(group => ({ key: group.key, label: groupLabel(group), values: group.values.map((entry, i) => label(dimensions[i], entry)), count: group.rows.length, share: group.rows.length / filtered.length * 100 }))}
+          onDetails={index => openDetails(shownGroups[index].key)} onFilter={index => updateFilters({ ...filters, ...Object.fromEntries(dimensions.map((dimension, i) => [dimension, [shownGroups[index].values[i]]])) })} /><ProgressiveRowsStatus {...groupProgress} unit="组" /></> : <div className="analysis-message"><p>{activeFilters.length ? '没有符合条件的数据，可调整筛选。' : '当前范围暂无交还车记录。'}</p>{activeFilters.length > 0 && <button className="analysis-button" onClick={() => updateFilters({})}>清空筛选</button>}</div>}
+      </> : <>
+        <p className="analysis-mobile-detail-scope">{detailGroup ? groupLabel(detailGroup) : '当前分组'}</p>
+        <div className="analysis-table-tools"><h3>交还车业务明细</h3><AnalysisExportButton disabled={!detailRows.length} onExport={exportWorkbook} /></div>
+        <div className="analysis-vehicle-cards">{shownDetails.map((row, index) => <article className="analysis-vehicle-card" key={`${row.truck_id}-${index}`}><header><h4><Blur>{row.plate_number || '未登记车牌'}</Blur></h4><span>{row.contract_type || '未标注合同类型'}</span></header><p>{row.handover_date || '日期缺失'}</p><p><Blur>{row.customer_name || '未提供客户'}</Blur></p></article>)}</div>
+        <ProgressiveRowsStatus {...detailProgress} unit="条" />
+      </>}
+    </div>
+    <footer className="analysis-footer"><details><summary>统计口径</summary><p>按当前入口的周业务记录统计车次，同一车辆多笔记录分别计次。仅展示当前可查看范围和筛选条件内的数据。</p></details></footer>
+  </>;
   return <div ref={scrollRoot} className="analysis-scroll">
     {!showDetails ? <>
       <div className="analysis-builder">
diff --git a/src/modules/assets/components/analysis/useProgressiveRows.ts b/src/modules/assets/components/analysis/useProgressiveRows.ts
index 6d88533..589a7f3 100644
--- a/src/modules/assets/components/analysis/useProgressiveRows.ts
+++ b/src/modules/assets/components/analysis/useProgressiveRows.ts
@@ -1,4 +1,4 @@
-import { useCallback, useEffect, useMemo, useState, type RefObject } from 'react';
+import { useCallback, useEffect, useMemo, useRef, useState, type RefObject } from 'react';
 
 interface ProgressiveRowsOptions {
   total: number;
@@ -6,11 +6,14 @@ interface ProgressiveRowsOptions {
   resetKey: unknown;
   enabled?: boolean;
   batchSize?: number;
+  preserveOnDisable?: boolean;
 }
 
 /** Render a cumulative prefix, loading another batch near the actual scroll body's bottom. */
-export function useProgressiveRows({ total, rootRef, resetKey, enabled = true, batchSize = 40 }: ProgressiveRowsOptions) {
-  const context = useMemo(() => ({ resetKey, enabled, batchSize }), [resetKey, enabled, batchSize]);
+export function useProgressiveRows({ total, rootRef, resetKey, enabled = true, batchSize = 40, preserveOnDisable = false }: ProgressiveRowsOptions) {
+  const resetEnabled = preserveOnDisable || enabled;
+  const context = useMemo(() => ({ resetKey, enabled: resetEnabled, batchSize }), [resetKey, resetEnabled, batchSize]);
+  const scrollContext = useRef(context);
   const [progress, setProgress] = useState(() => ({ context, limit: batchSize }));
   const [sentinel, setSentinel] = useState<HTMLDivElement | null>(null);
   const visibleCount = Math.min(total, progress.context === context ? progress.limit : batchSize);
@@ -21,8 +24,9 @@ export function useProgressiveRows({ total, rootRef, resetKey, enabled = true, b
   }, [enabled, context, total, batchSize]);
 
   useEffect(() => {
-    if (enabled && rootRef.current) rootRef.current.scrollTop = 0;
-  }, [context, enabled, rootRef]);
+    if (enabled && rootRef.current && (!preserveOnDisable || scrollContext.current !== context)) rootRef.current.scrollTop = 0;
+    scrollContext.current = context;
+  }, [context, enabled, rootRef, preserveOnDisable]);
 
   useEffect(() => {
     const root = rootRef.current;
diff --git a/src/server/auth/preview/routes.ts b/src/server/auth/preview/routes.ts
index bd2024e..c82391f 100644
--- a/src/server/auth/preview/routes.ts
+++ b/src/server/auth/preview/routes.ts
@@ -43,7 +43,7 @@ export function createPreviewRouter(service: Service = previewService) {
   return router;
 }
 
-// These POSTs only query data (AI previews suppress gap recording). Everything else is denied by default.
+// These POSTs do not change business data. AI previews suppress gap feedback but retain attributed question audit records.
 const READ_POSTS = new Set(['/api/vehicles/analysis', '/api/vehicles/analysis/details', '/api/asset-assistant/ask', '/api/asset-assistant/export']);
 export function createPreviewMiddleware(service: Service = previewService) {
   return async (c: Context, next: Next) => {
diff --git a/src/server/routes/asset-assistant/analysis.test.ts b/src/server/routes/asset-assistant/analysis.test.ts
index ba1d5d6..9aa9454 100644
--- a/src/server/routes/asset-assistant/analysis.test.ts
+++ b/src/server/routes/asset-assistant/analysis.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/boss-experience.test.ts b/src/server/routes/asset-assistant/boss-experience.test.ts
index 8016fa9..9bf1cca 100644
--- a/src/server/routes/asset-assistant/boss-experience.test.ts
+++ b/src/server/routes/asset-assistant/boss-experience.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test, { type TestContext } from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/composition.test.ts b/src/server/routes/asset-assistant/composition.test.ts
index 0a10514..ac0921b 100644
--- a/src/server/routes/asset-assistant/composition.test.ts
+++ b/src/server/routes/asset-assistant/composition.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test, { type TestContext } from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/experience.test.ts b/src/server/routes/asset-assistant/experience.test.ts
index e7eb5da..e2dbb6b 100644
--- a/src/server/routes/asset-assistant/experience.test.ts
+++ b/src/server/routes/asset-assistant/experience.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test, { type TestContext } from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/generative-route.test.ts b/src/server/routes/asset-assistant/generative-route.test.ts
index c573802..6e78b43 100644
--- a/src/server/routes/asset-assistant/generative-route.test.ts
+++ b/src/server/routes/asset-assistant/generative-route.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test, { type TestContext } from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/index.ts b/src/server/routes/asset-assistant/index.ts
index 601a13e..60ee9ce 100644
--- a/src/server/routes/asset-assistant/index.ts
+++ b/src/server/routes/asset-assistant/index.ts
@@ -21,6 +21,7 @@ import {
 } from "./session.js";
 import { resultScope, followupSuggestions } from "./presentation.js";
 import { gapStore } from "./gaps.js";
+import { questionLog, questionOutcome, finishQuestionLog } from "./question-log.js";
 import {
   CATEGORY_LABELS,
   GAP_STATUSES,
@@ -99,6 +100,10 @@ router.post("/feedback", async (c) => {
     const session = getSession(c.get("user"), body.subject, body.sessionId),
       node = getNode(session, body.resultId)!;
     if (!node.flagged) {
+      const logId = await questionLog.start(c.get("user"), { message: node.question || node.demand,
+        subject: body.subject, sessionId: session.id, baseResultId: node.id }, "feedback");
+      const saved = await finishQuestionLog(logId, { outcome: "feedback", reason: "unsatisfied", resultId: node.id });
+      if (!saved) return c.json({ error: "反馈已接收，处理状态暂未保存，请稍后重试。" }, 503);
       await gapStore.record(c.get("user").userId, node.demand, "unsatisfied");
       node.flagged = true;
     }
@@ -220,15 +225,24 @@ router.post("/ask", async (c) => {
   )
     return c.json({ error: "请输入有效问题或选择分析操作。" }, 400);
   const input: AssistantRequest = { ...raw, subject: raw.subject || null };
+  let logId: string;
+  try {
+    logId = await questionLog.start(user, input);
+  } catch {
+    return c.json({ error: "提问记录暂不可用，本次查询未执行，请稍后重试。" }, 503);
+  }
   const release = acquire(user.userId);
-  if (!release)
+  if (!release) {
+    await finishQuestionLog(logId, { outcome: "rejected", reason: "busy" });
     return c.json({ error: "上一条查询仍在执行，请稍后重试。" }, 429);
+  }
   let session, base;
   try {
     session = getSession(user, input.subject, input.sessionId);
     base = getNode(session, input.baseResultId);
   } catch {
     release();
+    await finishQuestionLog(logId, { outcome: "rejected", reason: "session_expired" });
     return c.json({ error: "会话已过期或范围已变化，请新建对话。" }, 409);
   }
   const currentSession = session,
@@ -238,6 +252,7 @@ router.post("/ask", async (c) => {
     stream.onAbort(() => controller.abort());
     const emit = (event: object) =>
       stream.writeSSE({ data: JSON.stringify(event) });
+    let logFinished = false;
     let demand = "查询执行",
       reason: GapReason | undefined;
     try {
@@ -516,8 +531,17 @@ router.post("/ask", async (c) => {
         type: "step",
         label: "分析完成",
       });
+      logFinished = true;
+      const saved = await finishQuestionLog(logId, { outcome: questionOutcome(result, gapReason),
+        reason: gapReason, sessionId: currentSession.id, result });
+      if (!saved) result.warning = [result.warning, "提问已记录，处理结果暂未保存。"].filter(Boolean).join(" ");
       await emit({ type: "result", result });
     } catch {
+      if (!logFinished) {
+        logFinished = true;
+        await finishQuestionLog(logId, { outcome: controller.signal.aborted ? "cancelled" : "failed",
+          reason: controller.signal.aborted ? "client_aborted" : "generation", sessionId: currentSession.id });
+      }
       if (!controller.signal.aborted) {
         let recorded = false;
         try {
@@ -534,6 +558,8 @@ router.post("/ask", async (c) => {
         });
       }
     } finally {
+      if (!logFinished) await finishQuestionLog(logId, { outcome: controller.signal.aborted ? "cancelled" : "failed",
+        reason: controller.signal.aborted ? "client_aborted" : "unfinished", sessionId: currentSession.id });
       release();
     }
   });
diff --git a/src/server/routes/asset-assistant/model.test.ts b/src/server/routes/asset-assistant/model.test.ts
index 3aa0ffc..49fc447 100644
--- a/src/server/routes/asset-assistant/model.test.ts
+++ b/src/server/routes/asset-assistant/model.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test from "node:test";
 import { Hono } from "hono";
diff --git a/src/server/routes/asset-assistant/question-log.test.ts b/src/server/routes/asset-assistant/question-log.test.ts
new file mode 100644
index 0000000..44a9eae
--- /dev/null
+++ b/src/server/routes/asset-assistant/question-log.test.ts
@@ -0,0 +1,160 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { Hono } from 'hono';
+import pool from '../../db.js';
+import router from './index.js';
+import { questionLog, questionOutcome, businessTypes, finishQuestionLog, redactQuestion, type QuestionCompletion } from './question-log.js';
+import { vehicleRepository } from '../vehicles/repository.js';
+import { gapStore } from './gaps.js';
+import { acquire } from './session.js';
+import type { AuthUser } from '../../auth/types.js';
+import type { AssistantResult } from '../../../shared/assets/assistant.js';
+
+const user: AuthUser = { userId: 'log-test', userName: '测试用户', loginName: 'test', roles: [], permissionLevel: 'personal', depCode: 'D', depName: '测试部门' };
+const result = (extra: Partial<AssistantResult> = {}): AssistantResult => ({
+  plan: { kind: 'assets', category: 'inventory', groupBy: 'region', view: 'table', filters: {} },
+  title: '库存', summary: '库存共 2 台', rows: [], groups: [], metrics: [], source: 'test', fetchedAt: '', ...extra,
+});
+function appFor(u = user) {
+  const app = new Hono<{ Variables: { user: AuthUser } }>();
+  app.use('*', async (c, next) => { c.set('user', u); await next(); });
+  app.route('/ai', router);
+  return app;
+}
+function ask(app: ReturnType<typeof appFor>, body: object = { message: '库存有多少车？', subject: null }) {
+  return app.request('/ai/ask', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify(body) });
+}
+
+test('each question has its own durable ID, full text and attributed preview identity; SQL is parameterized', async t => {
+  const calls: { sql: string; values: unknown[] }[] = [];
+  t.mock.method(pool, 'query', async (options: { sql: string }, values: unknown[]) => { calls.push({ sql: options.sql, values }); return [{ affectedRows: 1 }, []]; });
+  const preview = { ...user, preview: { actorId: 'real-actor', sessionId: 'preview-session' } };
+  const message = '按区域统计库存'.repeat(100) + " ' OR 1=1 --";
+  const first = await questionLog.start(preview, { message, subject: '公司甲' });
+  const second = await questionLog.start(preview, { message, subject: '公司甲' });
+  assert.notEqual(first, second);
+  assert.equal(calls[0].values[1], 'real-actor');
+  assert.equal(calls[0].values[2], user.userId);
+  assert.equal(calls[0].values[6], 1);
+  assert.equal(calls[0].values[12], message);
+  assert.ok(!calls[0].sql.includes(message));
+  await questionLog.finish(first, { outcome: 'success', sessionId: 'session', result: result() });
+  assert.match(calls[2].sql, /outcome='processing'/);
+  assert.equal(calls[2].values[4], '["inventory"]');
+  assert.match(String(calls[2].values[6]), /库存共 2 台/);
+  assert.ok(!String(calls[2].values[6]).includes('rows'));
+});
+
+test('outcomes and business categories separate partial, help, empty, unsupported and failure', () => {
+  assert.equal(questionOutcome(result()), 'success');
+  for (const value of ['partial', 'empty', 'unsupported', 'help', 'clarification'] as const) {
+    const r = result({ outcome: value });
+    if (value === 'clarification') r.plan.kind = 'clarify';
+    assert.equal(questionOutcome(r), value);
+  }
+  assert.equal(questionOutcome(result(), 'generation'), 'failed');
+  assert.deepEqual(businessTypes(result({ sections: [
+    { id: 'a', title: '库存', question: '库存', display: 'table', result: result() },
+    { id: 'b', title: '交车', question: '交车', display: 'table', result: result({ plan: { ...result().plan, kind: 'flow' } }) },
+  ] })), ['inventory', 'flow']);
+  assert.equal(redactQuestion('库存 sk-12345678 password=secret123 Bearer token123'), '库存 [凭据已隐藏] password=[凭据已隐藏] Bearer [凭据已隐藏]');
+});
+
+test('storage outage rejects the request before querying data or invoking AI', async t => {
+  t.mock.method(questionLog, 'start', async () => { throw new Error('private DB error'); });
+  const query = t.mock.method(vehicleRepository, 'getVehicles', async () => []);
+  const response = await ask(appFor());
+  assert.equal(response.status, 503);
+  assert.equal(query.mock.callCount(), 0);
+  assert.ok(!(await response.text()).includes('private DB'));
+});
+
+test('concurrency rejection and expired session are still durable classified questions', async t => {
+  const start = t.mock.method(questionLog, 'start', async () => 'id');
+  const finish = t.mock.method(questionLog, 'finish', async (_id: string, _completion: QuestionCompletion) => {});
+  const release = acquire(user.userId)!;
+  try { assert.equal((await ask(appFor())).status, 429); } finally { release(); }
+  assert.equal((await ask(appFor(), { message: '追问', subject: null, sessionId: 'missing' })).status, 409);
+  assert.equal(start.mock.callCount(), 2);
+  assert.equal(finish.mock.calls[0].arguments[1].reason, 'busy');
+  assert.equal(finish.mock.calls[1].arguments[1].reason, 'session_expired');
+});
+
+test('failed queries are logged for preview users without creating gap feedback', async t => {
+  const start = t.mock.method(questionLog, 'start', async () => 'id');
+  const finish = t.mock.method(questionLog, 'finish', async (_id: string, _completion: QuestionCompletion) => {});
+  const gap = t.mock.method(gapStore, 'record', async () => {});
+  t.mock.method(vehicleRepository, 'getVehicles', async () => { throw new Error('private failure'); });
+  const response = await ask(appFor({ ...user, preview: { actorId: 'actor', sessionId: 'preview' } }));
+  const text = await response.text();
+  assert.match(text, /查询未完成/);
+  assert.ok(!text.includes('private failure'));
+  assert.equal(start.mock.callCount(), 1);
+  assert.equal(finish.mock.calls[0].arguments[1].outcome, 'failed');
+  assert.equal(gap.mock.callCount(), 0);
+});
+
+test('finalization retries transient failures and reports persistent failures', async t => {
+  let calls = 0, alwaysFail = false;
+  t.mock.method(questionLog, 'finish', async () => { if (++calls === 1 || alwaysFail) throw new Error('transient'); });
+  assert.equal(await finishQuestionLog('id', { outcome: 'success' }), true);
+  assert.equal(calls, 2);
+  alwaysFail = true;
+  const warning = t.mock.method(console, 'error', () => {});
+  assert.equal(await finishQuestionLog('id', { outcome: 'failed' }), false);
+  assert.deepEqual(warning.mock.calls[0].arguments, ['asset_ai_question_completion_failed', 'id']);
+});
+
+test('successful questions, follow-ups, actions and feedback keep distinct operation types', async t => {
+  const statements: unknown[][] = [];
+  t.mock.method(pool, 'query', async (options: { sql?: string } | string, values: unknown[]) => {
+    if (typeof options !== 'string' && options.sql?.includes('bi_asset_ai_questions')) statements.push(values);
+    return [[], []];
+  });
+  t.mock.method(vehicleRepository, 'getVehicles', async () => []);
+  t.mock.method(gapStore, 'record', async () => {});
+  const old = process.env.ASSET_AI_EXTERNAL_ENABLED;
+  process.env.ASSET_AI_EXTERNAL_ENABLED = '0';
+  t.after(() => { if (old === undefined) delete process.env.ASSET_AI_EXTERNAL_ENABLED; else process.env.ASSET_AI_EXTERNAL_ENABLED = old; });
+  const app = appFor({ ...user, userId: 'success-test' });
+  const response = await ask(app);
+  const events = (await response.text()).split('\n').filter(line => line.startsWith('data:')).map(line => JSON.parse(line.slice(5)));
+  const r = events.find(event => event.type === 'result')?.result as AssistantResult;
+  assert.ok(r, JSON.stringify(events));
+  assert.equal(statements[0][11], 'question');
+  assert.ok(['success', 'empty'].includes(String(statements[1][0])));
+  assert.equal(statements[1][2], r.sessionId);
+  assert.equal(statements[1][3], r.resultId);
+  assert.deepEqual(JSON.parse(String(statements[1][4])), ['inventory']);
+  await questionLog.start(user, { message: '按区域看', subject: null, sessionId: r.sessionId });
+  assert.equal(statements.at(-1)![11], 'followup');
+  await questionLog.start(user, { subject: null, sessionId: r.sessionId, baseResultId: r.resultId, action: { type: 'category', category: 'abnormal' } });
+  assert.equal(statements.at(-1)![11], 'action');
+  assert.deepEqual(JSON.parse(String(statements.at(-1)![13])), { type: 'category', category: 'abnormal' });
+  const feedback = await app.request('/ai/feedback', { method: 'POST', headers: { 'Content-Type': 'application/json' }, body: JSON.stringify({ sessionId: r.sessionId, resultId: r.resultId, subject: null }) });
+  assert.equal(feedback.status, 200);
+  assert.equal(statements.at(-2)![11], 'feedback');
+  assert.equal(statements.at(-1)![0], 'feedback');
+});
+
+test('client cancellation finalizes the durable question and releases the user query lock', async t => {
+  t.mock.method(questionLog, 'start', async () => 'cancel-id');
+  let complete!: (value: QuestionCompletion) => void;
+  const completed = new Promise<QuestionCompletion>(resolve => { complete = resolve; });
+  t.mock.method(questionLog, 'finish', async (_id: string, completion: QuestionCompletion) => { complete(completion); });
+  let continueQuery!: () => void;
+  t.mock.method(vehicleRepository, 'getVehicles', async () => { await new Promise<void>(resolve => { continueQuery = resolve; }); return []; });
+  const cancelledUser = { ...user, userId: 'cancel-test' };
+  const response = await ask(appFor(cancelledUser));
+  const reader = response.body!.getReader();
+  await reader.read();
+  await reader.cancel();
+  continueQuery();
+  const completion = await completed;
+  assert.equal(completion.outcome, 'cancelled');
+  // Finalizer releases the lock after the asynchronous database update.
+  await new Promise(resolve => setImmediate(resolve));
+  const release = acquire(cancelledUser.userId);
+  assert.ok(release);
+  release();
+});
diff --git a/src/server/routes/asset-assistant/question-log.ts b/src/server/routes/asset-assistant/question-log.ts
new file mode 100644
index 0000000..418471a
--- /dev/null
+++ b/src/server/routes/asset-assistant/question-log.ts
@@ -0,0 +1,72 @@
+import { randomUUID } from 'node:crypto';
+import pool from '../../db.js';
+import type { AuthUser } from '../../auth/types.js';
+import type { AssistantRequest, AssistantResult, GapReason } from '../../../shared/assets/assistant.js';
+
+export type QuestionOutcome = 'processing' | 'success' | 'empty' | 'partial' | 'clarification' | 'help' | 'unsupported' | 'failed' | 'cancelled' | 'rejected' | 'feedback';
+export type QuestionCompletion = {
+  outcome: QuestionOutcome;
+  sessionId?: string;
+  resultId?: string;
+  result?: AssistantResult;
+  reason?: string;
+};
+// Credentials are never useful for question analysis. Keep the rest of the accepted question intact.
+export function redactQuestion(value: string): string {
+  return value.replace(/sk-[a-z0-9_-]{8,}/gi, '[凭据已隐藏]')
+    .replace(/(Bearer\s+)[\w.+/=-]+/gi, '$1[凭据已隐藏]')
+    .replace(/((?:password|passwd|api[_-]?key|access[_-]?token|secret|密码|口令)\s*[:=：]\s*)[^\s,，;；]+/gi, '$1[凭据已隐藏]');
+}
+export function questionOutcome(result: AssistantResult, reason?: GapReason): QuestionOutcome {
+  if (result.outcome === 'partial' || result.unanswered?.length) return 'partial';
+  if (reason === 'unsupported' || result.outcome === 'unsupported') return 'unsupported';
+  if (reason === 'generation') return 'failed';
+  if (result.outcome === 'help' || result.answerKind === 'help') return 'help';
+  if (result.plan.kind === 'clarify') return 'clarification';
+  if (result.outcome === 'empty' || reason === 'empty') return 'empty';
+  return 'success';
+}
+export function businessTypes(result?: AssistantResult): string[] {
+  if (!result) return [];
+  const items = result.sections?.flatMap(section => section.result ? [section.result] : []) || [result];
+  return [...new Set(items.map(item => item.plan.kind === 'flow' ? 'flow' : item.plan.kind === 'clarify' ? 'general' : item.plan.category))];
+}
+export const questionLog = {
+  async start(user: AuthUser, input: AssistantRequest, eventType?: 'feedback'): Promise<string> {
+    const id = randomUUID();
+    await pool.query({ sql: `INSERT INTO bi_asset_ai_questions
+      (id,actor_id,user_id,login_name,user_name,permission_level,is_preview,preview_session_id,
+       session_id,base_result_id,subject,event_type,question,action_json,outcome,started_at)
+      VALUES (?,?,?,?,?,?,?,?,?,?,?,?,?,?,'processing',UTC_TIMESTAMP(3))`, timeout: 5000 }, [
+      id, user.preview?.actorId || user.userId, user.userId, user.loginName, user.userName,
+      user.permissionLevel, user.preview ? 1 : 0, user.preview?.sessionId || null,
+      input.sessionId || null, input.baseResultId || null, input.subject,
+      eventType || (input.action ? 'action' : input.sessionId ? 'followup' : 'question'),
+      input.message ? redactQuestion(input.message) : null,
+      input.action ? JSON.stringify(input.action, (_key, value) => typeof value === "string" ? redactQuestion(value) : value) : null,
+    ]);
+    return id;
+  },
+  async finish(id: string, completion: QuestionCompletion): Promise<void> {
+    const result = completion.result;
+    // Persist the textual answer and classification, not a duplicate of vehicle detail datasets.
+    await pool.query({ sql: `UPDATE bi_asset_ai_questions SET outcome=?,reason=?,session_id=COALESCE(?,session_id),
+      result_id=?,business_types=?,engine=?,answer=?,finished_at=UTC_TIMESTAMP(3),
+      duration_ms=TIMESTAMPDIFF(MICROSECOND,started_at,UTC_TIMESTAMP(3)) DIV 1000
+      WHERE id=? AND outcome='processing'`, timeout: 5000 }, [
+      completion.outcome, completion.reason || null, completion.sessionId || null,
+      completion.resultId || result?.resultId || null, JSON.stringify(businessTypes(result)),
+      result?.engine || null, result ? redactQuestion(JSON.stringify({ summary: result.summary, warning: result.warning,
+        unanswered: result.unanswered, sections: result.sections?.map(section => ({ title: section.title, summary: section.result?.summary })) })) : null, id,
+    ]);
+  },
+};
+
+/** A failed update never erases the durable original question. Retry once and expose failure to the caller. */
+export async function finishQuestionLog(id: string, completion: QuestionCompletion): Promise<boolean> {
+  for (let attempt = 0; attempt < 2; attempt++) {
+    try { await questionLog.finish(id, completion); return true; } catch { /* retry transient failures */ }
+  }
+  console.error('asset_ai_question_completion_failed', id);
+  return false;
+}
diff --git a/src/server/routes/asset-assistant/vehicle-answer.acceptance.test.ts b/src/server/routes/asset-assistant/vehicle-answer.acceptance.test.ts
index 452a015..2c780cb 100644
--- a/src/server/routes/asset-assistant/vehicle-answer.acceptance.test.ts
+++ b/src/server/routes/asset-assistant/vehicle-answer.acceptance.test.ts
@@ -1,3 +1,10 @@
+import { beforeEach } from 'node:test';
+import { questionLog } from './question-log.js';
+beforeEach(t => {
+  if (!('mock' in t)) throw new Error('Expected test context');
+  t.mock.method(questionLog, 'start', async () => 'synthetic-question');
+  t.mock.method(questionLog, 'finish', async () => {});
+});
 import assert from "node:assert/strict";
 import test, { type TestContext } from "node:test";
 import { Hono } from "hono";