diff --git a/src/modules/energy/ETCDetails.tsx b/src/modules/energy/ETCDetails.tsx
index df7857f..3bb6772 100644
--- a/src/modules/energy/ETCDetails.tsx
+++ b/src/modules/energy/ETCDetails.tsx
@@ -1,16 +1,25 @@
 import { useEffect, useState } from 'react';
-import { ChevronLeft, ChevronRight, ReceiptText, Route, Search } from 'lucide-react';
+import { CheckCircle2, ChevronLeft, ChevronRight, ReceiptText, Route, Search, TriangleAlert } from 'lucide-react';
 import Blur from '../../components/Blur';
 import { ErrorState, LoadingState } from '../../components/ui/surface';
 import { fetchEtcBills, fetchEtcRecords } from './api';
-import type { EtcBillResponse, EtcTollRecordResponse } from './types';
+import type { EtcBillResponse, EtcOverviewResponse, EtcTollRecordResponse } from './types';
 import type { EtcDetailView, EtcDrillContext } from './etc-drill-context';
 import { DateRangeInputs } from './AnalysisDateFilters';
+import { reconcileEtcBills, reconcileEtcRecords } from './etc-reconciliation';
 
 function fmtMoney(value: number): string {
   return `¥${value.toLocaleString('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 })}`;
 }
 
+function formatSigned(value: number, fractionDigits = 0): string {
+  const formatted = Math.abs(value).toLocaleString('zh-CN', {
+    minimumFractionDigits: fractionDigits,
+    maximumFractionDigits: fractionDigits,
+  });
+  return `${value >= 0 ? '+' : '-'}${formatted}`;
+}
+
 function costTypeLabel(value: number): string {
   if (value === 1) return '客户承担';
   if (value === 2) return '我方承担';
@@ -25,9 +34,11 @@ function paymentLabel(receivable: number, paid: number): string {
 
 export default function ETCDetails({
   context,
+  overviewKpi,
   onContextChange,
 }: {
   context: EtcDrillContext;
+  overviewKpi: EtcOverviewResponse['kpi'];
   onContextChange: (context: EtcDrillContext, mode: 'push' | 'replace') => void;
 }) {
   const { view, startDate, endDate, search, page } = context;
@@ -72,6 +83,29 @@ export default function ETCDetails({
 
   const activeData = view === 'records' ? records : bills;
   const totalPages = activeData?.totalPages || 1;
+  const isFullDataset = !startDate && !endDate && !search;
+  const reconciliation = isFullDataset
+    ? view === 'records' && records
+      ? reconcileEtcRecords(overviewKpi, records)
+      : view === 'bills' && bills
+        ? reconcileEtcBills(overviewKpi, bills)
+        : null
+    : null;
+  const reconciliationDifferences = reconciliation && !reconciliation.matches
+    ? 'passageCountDifference' in reconciliation
+      ? [
+          reconciliation.passageCountDifference !== 0 && `通行次数 ${formatSigned(reconciliation.passageCountDifference)}`,
+          reconciliation.vehicleCountDifference !== 0 && `车辆数 ${formatSigned(reconciliation.vehicleCountDifference)}`,
+          reconciliation.tollAmountDifference !== 0 && `通行费 ${formatSigned(reconciliation.tollAmountDifference, 2)} 元`,
+          reconciliation.serviceFeeDifference !== 0 && `服务费 ${formatSigned(reconciliation.serviceFeeDifference, 2)} 元`,
+          reconciliation.totalAmountDifference !== 0 && `总费用 ${formatSigned(reconciliation.totalAmountDifference, 2)} 元`,
+        ].filter(Boolean).join(' · ')
+      : [
+          reconciliation.billCountDifference !== 0 && `账单数 ${formatSigned(reconciliation.billCountDifference)}`,
+          reconciliation.receivableAmountDifference !== 0 && `应收 ${formatSigned(reconciliation.receivableAmountDifference, 2)} 元`,
+          reconciliation.paidAmountDifference !== 0 && `已收 ${formatSigned(reconciliation.paidAmountDifference, 2)} 元`,
+        ].filter(Boolean).join(' · ')
+    : '';
   const applySearch = () => {
     onContextChange({ ...context, search: draftSearch.trim(), page: 1 }, 'replace');
   };
@@ -167,6 +201,26 @@ export default function ETCDetails({
         </div>
       ) : null}
 
+      {reconciliation && (
+        <div
+          role={reconciliation.matches ? 'status' : 'alert'}
+          className={`flex items-start gap-2 border-b px-3 py-2 text-[10px] font-bold md:px-4 ${
+            reconciliation.matches
+              ? 'border-emerald-100 bg-emerald-50 text-emerald-700'
+              : 'border-amber-200 bg-amber-50 text-amber-800'
+          }`}
+        >
+          {reconciliation.matches
+            ? <CheckCircle2 size={14} className="mt-0.5 shrink-0" />
+            : <TriangleAlert size={14} className="mt-0.5 shrink-0" />}
+          <span>
+            {reconciliation.matches
+              ? `口径核对通过：总览与 ${activeData?.total ?? 0} 条${view === 'records' ? '通行记录' : '结算账单'}全量汇总一致`
+              : `口径存在差异：${reconciliationDifferences}`}
+          </span>
+        </div>
+      )}
+
       {error ? (
         <ErrorState message={error} variant="inline" />
       ) : loading && !activeData ? (
diff --git a/src/modules/energy/ETCView.tsx b/src/modules/energy/ETCView.tsx
index 47ef5b3..444b225 100644
--- a/src/modules/energy/ETCView.tsx
+++ b/src/modules/energy/ETCView.tsx
@@ -176,7 +176,7 @@ export default function ETCView() {
         </SurfaceCard>
       </div>
 
-      <ETCDetails context={detailContext} onContextChange={commitDetailContext} />
+      <ETCDetails context={detailContext} overviewKpi={kpi} onContextChange={commitDetailContext} />
 
       {error && <ErrorState message={error} />}
     </div>
diff --git a/src/modules/energy/etc-reconciliation.test.ts b/src/modules/energy/etc-reconciliation.test.ts
new file mode 100644
index 0000000..1b09a39
--- /dev/null
+++ b/src/modules/energy/etc-reconciliation.test.ts
@@ -0,0 +1,69 @@
+import assert from 'node:assert/strict';
+import test from 'node:test';
+import { reconcileEtcBills, reconcileEtcRecords } from './etc-reconciliation.js';
+import type { EtcBillResponse, EtcOverviewResponse, EtcTollRecordResponse } from './types.js';
+
+const kpi: EtcOverviewResponse['kpi'] = {
+  passageCount: 12,
+  vehicleCount: 4,
+  tollAmount: 100.01,
+  serviceFee: 5.02,
+  totalAmount: 105.03,
+  billCount: 2,
+  receivableAmount: 105.03,
+  paidAmount: 80,
+  latestTransactionTime: '2026-07-01 12:00:00',
+};
+
+const records: EtcTollRecordResponse = {
+  page: 1,
+  limit: 20,
+  total: 12,
+  totalPages: 1,
+  filters: { startDate: null, endDate: null, search: '' },
+  summary: { vehicleCount: 4, tollAmount: 100.01, serviceFee: 5.02, totalAmount: 105.03 },
+  items: [],
+};
+
+const bills: EtcBillResponse = {
+  page: 1,
+  limit: 20,
+  total: 2,
+  totalPages: 1,
+  filters: { startDate: null, endDate: null, search: '' },
+  summary: { receivableAmount: 105.03, paidAmount: 80 },
+  items: [],
+};
+
+test('matches ETC overview against full record and bill summaries', () => {
+  assert.equal(reconcileEtcRecords(kpi, records).matches, true);
+  assert.equal(reconcileEtcBills(kpi, bills).matches, true);
+});
+
+test('reports record count, vehicle, and fee differences at hundredth precision', () => {
+  assert.deepEqual(reconcileEtcRecords(kpi, {
+    ...records,
+    total: 13,
+    summary: { vehicleCount: 3, tollAmount: 100, serviceFee: 5.04, totalAmount: 105.04 },
+  }), {
+    matches: false,
+    passageCountDifference: 1,
+    vehicleCountDifference: -1,
+    tollAmountDifference: -0.01,
+    serviceFeeDifference: 0.02,
+    totalAmountDifference: 0.01,
+  });
+});
+
+test('reports bill count and settlement differences at hundredth precision', () => {
+  assert.deepEqual(reconcileEtcBills(kpi, {
+    ...bills,
+    total: 1,
+    summary: { receivableAmount: 100, paidAmount: 80.01 },
+  }), {
+    matches: false,
+    billCountDifference: -1,
+    receivableAmountDifference: -5.03,
+    paidAmountDifference: 0.01,
+  });
+});
diff --git a/src/modules/energy/etc-reconciliation.ts b/src/modules/energy/etc-reconciliation.ts
new file mode 100644
index 0000000..c684437
--- /dev/null
+++ b/src/modules/energy/etc-reconciliation.ts
@@ -0,0 +1,61 @@
+import type { EtcBillResponse, EtcOverviewResponse, EtcTollRecordResponse } from './types';
+
+export interface EtcRecordReconciliation {
+  matches: boolean;
+  passageCountDifference: number;
+  vehicleCountDifference: number;
+  tollAmountDifference: number;
+  serviceFeeDifference: number;
+  totalAmountDifference: number;
+}
+
+export interface EtcBillReconciliation {
+  matches: boolean;
+  billCountDifference: number;
+  receivableAmountDifference: number;
+  paidAmountDifference: number;
+}
+
+function hundredths(value: number): number {
+  return Math.round(value * 100);
+}
+
+export function reconcileEtcRecords(
+  kpi: EtcOverviewResponse['kpi'],
+  records: EtcTollRecordResponse,
+): EtcRecordReconciliation {
+  const tollDifference = hundredths(records.summary.tollAmount) - hundredths(kpi.tollAmount);
+  const serviceFeeDifference = hundredths(records.summary.serviceFee) - hundredths(kpi.serviceFee);
+  const totalDifference = hundredths(records.summary.totalAmount) - hundredths(kpi.totalAmount);
+  const passageCountDifference = records.total - kpi.passageCount;
+  const vehicleCountDifference = records.summary.vehicleCount - kpi.vehicleCount;
+
+  return {
+    matches: passageCountDifference === 0
+      && vehicleCountDifference === 0
+      && tollDifference === 0
+      && serviceFeeDifference === 0
+      && totalDifference === 0,
+    passageCountDifference,
+    vehicleCountDifference,
+    tollAmountDifference: tollDifference / 100,
+    serviceFeeDifference: serviceFeeDifference / 100,
+    totalAmountDifference: totalDifference / 100,
+  };
+}
+
+export function reconcileEtcBills(
+  kpi: EtcOverviewResponse['kpi'],
+  bills: EtcBillResponse,
+): EtcBillReconciliation {
+  const receivableDifference = hundredths(bills.summary.receivableAmount) - hundredths(kpi.receivableAmount);
+  const paidDifference = hundredths(bills.summary.paidAmount) - hundredths(kpi.paidAmount);
+  const billCountDifference = bills.total - kpi.billCount;
+
+  return {
+    matches: billCountDifference === 0 && receivableDifference === 0 && paidDifference === 0,
+    billCountDifference,
+    receivableAmountDifference: receivableDifference / 100,
+    paidAmountDifference: paidDifference / 100,
+  };
+}
diff --git a/src/modules/energy/types.ts b/src/modules/energy/types.ts
index baceb0d..2976f53 100644
--- a/src/modules/energy/types.ts
+++ b/src/modules/energy/types.ts
@@ -203,7 +203,7 @@ export interface EtcTollRecordResponse {
   total: number;
   totalPages: number;
   filters: EtcListFilters;
-  summary: { tollAmount: number; serviceFee: number; totalAmount: number };
+  summary: { vehicleCount: number; tollAmount: number; serviceFee: number; totalAmount: number };
   items: EtcTollRecord[];
 }
 
diff --git a/src/server/routes/energy/index.ts b/src/server/routes/energy/index.ts
index 896b23f..c6d99b4 100644
--- a/src/server/routes/energy/index.ts
+++ b/src/server/routes/energy/index.ts
@@ -1020,6 +1020,7 @@ app.get('/etc/records', async (c) => {
   const [[summaryRows], [detailRows]] = await observeDataSource('etcDatabase', () => Promise.all([
     pool.query<RowDataPacket[]>(
       `SELECT COUNT(*) AS total,
+              COUNT(DISTINCT plate_number) AS vehicleCount,
               SUM(toll_amount) AS tollAmount,
               SUM(service_fee) AS serviceFee,
               SUM(total_amount) AS totalAmount
@@ -1058,6 +1059,7 @@ app.get('/etc/records', async (c) => {
     totalPages: Math.max(1, Math.ceil(total / limit)),
     filters: { startDate: startDate || null, endDate: endDate || null, search },
     summary: {
+      vehicleCount: Number(summary.vehicleCount) || 0,
       tollAmount: Math.round((Number(summary.tollAmount) || 0) * 100) / 100,
       serviceFee: Math.round((Number(summary.serviceFee) || 0) * 100) / 100,
       totalAmount: Math.round((Number(summary.totalAmount) || 0) * 100) / 100,