diff --git a/vehicle-data-platform/apps/web/src/pages/Mileage.tsx b/vehicle-data-platform/apps/web/src/pages/Mileage.tsx
index e7b70049..f5cf4d44 100644
--- a/vehicle-data-platform/apps/web/src/pages/Mileage.tsx
+++ b/vehicle-data-platform/apps/web/src/pages/Mileage.tsx
@@ -1446,6 +1446,66 @@ export function Mileage({
       onClick: exportMileage
     }
   ];
+  const mileageDefinitionMetrics = [
+    {
+      label: '区间总值',
+      value: `${formatKm(summary.totalMileageKm)} km`,
+      detail: `来自汇总口径，覆盖 ${summary.vehicleCount.toLocaleString()} 辆车。`,
+      color: 'blue' as const,
+      onClick: copyStatisticsSummary
+    },
+    {
+      label: '明细合计',
+      value: `${formatKm(pageMileageTotal)} km`,
+      detail: `${rows.length.toLocaleString()} / ${summary.recordCount.toLocaleString()} 条明细，覆盖 ${formatPercent(pageCoverageRate)}。`,
+      color: hasFullMileagePage ? 'green' as const : 'orange' as const,
+      onClick: copyPublishAudit
+    },
+    {
+      label: '闭合差值',
+      value: closureDeltaKm == null ? '需全量' : `${formatKm(Math.abs(closureDeltaKm))} km`,
+      detail: closureDeltaKm == null ? '当前为分页抽样，交付前需要拉齐全量明细。' : closureActionText,
+      color: closureStatusColor,
+      onClick: copyPublishAudit
+    },
+    {
+      label: '异常记录',
+      value: `${anomalyRows.length.toLocaleString()} 条`,
+      detail: anomalyRows[0] ? `${anomalyRows[0].plate || anomalyRows[0].vin} / ${anomalyRows[0].date} 优先复核。` : '当前页没有异常日里程。',
+      color: anomalyRows.length > 0 ? 'orange' as const : 'green' as const,
+      onClick: () => anomalyRows[0] ? copyMileageEvidence(anomalyRows[0]) : copyMileageDecision()
+    }
+  ];
+  const mileageDefinitionActions = [
+    {
+      label: '复制口径',
+      action: '决策说明',
+      color: 'blue' as const,
+      disabled: false,
+      onClick: copyMileageDecision
+    },
+    {
+      label: '复制交付',
+      action: '交付包',
+      color: mileageDeliveryColor,
+      disabled: false,
+      onClick: copyMileageDeliveryPackage
+    },
+    {
+      label: '轨迹复核',
+      action: '轨迹',
+      color: currentVehicleKeyword ? 'blue' as const : 'grey' as const,
+      disabled: !currentVehicleKeyword || !onOpenHistory,
+      onClick: () => onOpenHistory?.({ keyword: currentVehicleKeyword, protocol: currentProtocol, dateFrom: filters.dateFrom ?? '', dateTo: filters.dateTo ?? '' })
+    },
+    {
+      label: '导出明细',
+      action: 'CSV',
+      color: rows.length > 0 ? 'blue' as const : 'grey' as const,
+      disabled: rows.length === 0,
+      onClick: exportMileage
+    }
+  ];
   const mileageServiceTasks = [
     {
       title: '发布判断',
@@ -1655,6 +1715,51 @@ export function Mileage({
           ))}
         </div>
       </section>
+      <section className="vp-mileage-definition-strip" aria-label="客户里程口径交付条">
+        <div className="vp-mileage-definition-copy">
+          <Space wrap>
+            <Tag color="blue">客户里程口径交付条</Tag>
+            <Tag color={closureStatusColor}>{closureStatus}</Tag>
+            <Tag color={publishAuditColor}>{publishAuditConclusion}</Tag>
+          </Space>
+          <Typography.Title heading={5} style={{ margin: 0 }}>
+            日里程按当天首末总里程差值计算；区间总值必须等于每日里程之和，异常日进入轨迹和历史明细复核。
+          </Typography.Title>
+          <Typography.Text type="secondary">
+            这是客户、BI 和运营三方共用口径：同一车辆、同一时间窗、同一统计证据，导出前先看闭合差值和异常记录。
+          </Typography.Text>
+        </div>
+        <div className="vp-mileage-definition-metrics">
+          {mileageDefinitionMetrics.map((item) => (
+            <button
+              key={item.label}
+              type="button"
+              className="vp-mileage-definition-metric"
+              onClick={item.onClick}
+              aria-label={`客户里程口径交付 ${item.label} ${item.value}`}
+            >
+              <Tag color={item.color}>{item.label}</Tag>
+              <strong>{item.value}</strong>
+              <span>{item.detail}</span>
+            </button>
+          ))}
+        </div>
+        <div className="vp-mileage-definition-actions">
+          {mileageDefinitionActions.map((item) => (
+            <button
+              key={item.label}
+              type="button"
+              className="vp-mileage-definition-action"
+              disabled={item.disabled}
+              onClick={item.onClick}
+              aria-label={`客户里程口径动作 ${item.label} ${item.action}`}
+            >
+              <Tag color={item.color}>{item.label}</Tag>
+              <span>{item.action}</span>
+            </button>
+          ))}
+        </div>
+      </section>
       <section className="vp-mileage-customer-workbench" aria-label="客户里程统计工作台">
         <div className="vp-mileage-customer-workbench-main">
           <Space wrap>
diff --git a/vehicle-data-platform/apps/web/src/styles/global.css b/vehicle-data-platform/apps/web/src/styles/global.css
index f4e4cb89..720fee60 100644
--- a/vehicle-data-platform/apps/web/src/styles/global.css
+++ b/vehicle-data-platform/apps/web/src/styles/global.css
@@ -8932,6 +8932,109 @@ button.vp-realtime-command-item:focus-visible {
   white-space: nowrap;
 }
 
+.vp-mileage-definition-strip {
+  margin-top: 12px;
+  border: 1px solid rgba(11, 159, 119, 0.18);
+  border-radius: var(--vp-radius);
+  background: #fff;
+  display: grid;
+  grid-template-columns: minmax(300px, 0.92fr) minmax(0, 1.28fr) minmax(190px, 0.5fr);
+  overflow: hidden;
+}
+
+.vp-mileage-definition-copy {
+  padding: 18px;
+  border-right: 1px solid var(--vp-border);
+  background: #f6fbf9;
+  display: grid;
+  gap: 10px;
+  align-content: start;
+}
+
+.vp-mileage-definition-metrics {
+  padding: 14px;
+  display: grid;
+  grid-template-columns: repeat(4, minmax(0, 1fr));
+  gap: 10px;
+}
+
+.vp-mileage-definition-metric {
+  min-height: 112px;
+  padding: 12px;
+  border: 1px solid rgba(11, 159, 119, 0.14);
+  border-radius: 8px;
+  background: #fbfefc;
+  color: inherit;
+  cursor: pointer;
+  font: inherit;
+  text-align: left;
+  display: grid;
+  gap: 8px;
+  align-content: start;
+}
+
+.vp-mileage-definition-metric:hover,
+.vp-mileage-definition-metric:focus-visible,
+.vp-mileage-definition-action:hover,
+.vp-mileage-definition-action:focus-visible {
+  border-color: rgba(11, 159, 119, 0.4);
+  background: #f5fbf8;
+  box-shadow: var(--vp-shadow-sm);
+  outline: none;
+}
+
+.vp-mileage-definition-metric strong {
+  color: var(--vp-text);
+  font-size: 19px;
+  line-height: 24px;
+  word-break: break-word;
+}
+
+.vp-mileage-definition-metric span {
+  color: var(--vp-text-muted);
+  font-size: 12px;
+  line-height: 18px;
+  word-break: break-word;
+}
+
+.vp-mileage-definition-actions {
+  padding: 14px;
+  border-left: 1px solid var(--vp-border);
+  background: #fbfefc;
+  display: grid;
+  grid-template-columns: 1fr;
+  gap: 8px;
+}
+
+.vp-mileage-definition-action {
+  min-height: 46px;
+  padding: 8px 10px;
+  border: 1px solid rgba(11, 159, 119, 0.14);
+  border-radius: 8px;
+  background: #fff;
+  color: inherit;
+  cursor: pointer;
+  font: inherit;
+  text-align: left;
+  display: flex;
+  align-items: center;
+  justify-content: space-between;
+  gap: 8px;
+}
+
+.vp-mileage-definition-action:disabled {
+  cursor: not-allowed;
+  opacity: 0.62;
+}
+
+.vp-mileage-definition-action span {
+  color: var(--vp-success);
+  font-size: 12px;
+  font-weight: 700;
+  line-height: 18px;
+  white-space: nowrap;
+}
+
 .vp-mileage-customer-workbench {
   margin-top: 16px;
   border: 1px solid rgba(22, 100, 255, 0.18);
@@ -13699,6 +13802,8 @@ button.vp-realtime-command-item:focus-visible {
   .vp-stat-insight-grid,
   .vp-mileage-conclusion-strip,
   .vp-mileage-conclusion-metrics,
+  .vp-mileage-definition-strip,
+  .vp-mileage-definition-metrics,
   .vp-mileage-customer-workbench,
   .vp-mileage-customer-workbench-grid,
   .vp-mileage-reconciliation-conclusion,
@@ -13836,7 +13941,9 @@ button.vp-realtime-command-item:focus-visible {
   }
 
   .vp-mileage-conclusion-copy,
-  .vp-mileage-conclusion-actions {
+  .vp-mileage-conclusion-actions,
+  .vp-mileage-definition-copy,
+  .vp-mileage-definition-actions {
     border-left: 0;
     border-right: 0;
     border-bottom: 1px solid var(--vp-border);
diff --git a/vehicle-data-platform/apps/web/src/test/App.test.tsx b/vehicle-data-platform/apps/web/src/test/App.test.tsx
index cd62e0de..3bd240ec 100644
--- a/vehicle-data-platform/apps/web/src/test/App.test.tsx
+++ b/vehicle-data-platform/apps/web/src/test/App.test.tsx
@@ -9157,8 +9157,8 @@ test('shows mileage statistics workspace with trend source and definition', asyn
   expect(screen.getAllByText('140 km').length).toBeGreaterThanOrEqual(1);
   expect(screen.getByText('统计闭合工作台')).toBeInTheDocument();
   expect(screen.getByText('汇总总里程')).toBeInTheDocument();
-  expect(screen.getByText('明细合计')).toBeInTheDocument();
-  expect(screen.getByText('闭合差值')).toBeInTheDocument();
+  expect(screen.getAllByText('明细合计').length).toBeGreaterThanOrEqual(1);
+  expect(screen.getAllByText('闭合差值').length).toBeGreaterThanOrEqual(1);
   expect(screen.getByText('记录覆盖率')).toBeInTheDocument();
   expect(screen.getAllByText('闭合通过').length).toBeGreaterThanOrEqual(1);
   expect(screen.getAllByText('当前筛选范围汇总总里程与明细合计一致，可作为统计证据。').length).toBeGreaterThanOrEqual(1);
@@ -9312,6 +9312,16 @@ test('shows vehicle-first statistics domains for one vehicle service', async ()
   expect(screen.getByRole('button', { name: '客户里程动作 轨迹复核 轨迹回放' })).toBeInTheDocument();
   expect(screen.getByRole('button', { name: '客户里程动作 导出明细 导出CSV' })).toBeInTheDocument();
   expect(screen.getByRole('button', { name: '客户里程动作 告警通知 在线态势' })).toBeInTheDocument();
+  expect(screen.getByText('客户里程口径交付条')).toBeInTheDocument();
+  expect(screen.getByText('日里程按当天首末总里程差值计算；区间总值必须等于每日里程之和，异常日进入轨迹和历史明细复核。')).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径交付 区间总值 210 km' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径交付 明细合计 170 km' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径交付 闭合差值 需全量' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径交付 异常记录 1 条' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径动作 复制口径 决策说明' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径动作 复制交付 交付包' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径动作 轨迹复核 轨迹' })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '客户里程口径动作 导出明细 CSV' })).toBeInTheDocument();
   expect(screen.getByText('客户里程统计工作台')).toBeInTheDocument();
   expect(screen.getByText('统计页先回答客户这段时间跑了多少、每日是否闭合、异常在哪里、能否导出。')).toBeInTheDocument();
   expect(screen.getByText('来源证据只用于统计可信度：JT808')).toBeInTheDocument();