diff --git a/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.test.tsx
index 987a8b92..88293f2c 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.test.tsx
@@ -37,6 +37,22 @@ const monitorSummaryFixture = vi.hoisted(() => ({
 const vehicleCardFixture = vi.hoisted(() => ({ detail: undefined as unknown }));
 const originalClipboard = Object.getOwnPropertyDescriptor(navigator, 'clipboard');
 
+function mockMobileViewport() {
+  const addEventListener = vi.fn();
+  const removeEventListener = vi.fn();
+  vi.spyOn(window, 'matchMedia').mockReturnValue({
+    matches: true,
+    media: '(max-width: 760px)',
+    onchange: null,
+    addEventListener,
+    removeEventListener,
+    addListener: vi.fn(),
+    removeListener: vi.fn(),
+    dispatchEvent: vi.fn(() => false)
+  } as unknown as MediaQueryList);
+  return { addEventListener, removeEventListener };
+}
+
 vi.mock('../map/FleetMap', () => ({
   FleetMap: ({ selectedVin, onSelectVin, initialViewport }: { selectedVin?: string; onSelectVin?: (vin: string) => void; initialViewport?: { zoom: number; bounds: string } }) => {
     fleetMapRenderSpy(selectedVin, initialViewport);
@@ -384,6 +400,21 @@ test('keeps authorized vehicles without realtime coordinates in the list without
   expect(reverseGeocode).not.toHaveBeenCalled();
 });
 
+test('keeps the desktop realtime list available when a runtime response omits protocols', async () => {
+  const runtimeRow = {
+    ...vehicles[0],
+    protocols: null,
+    primaryProtocol: ''
+  } as unknown as VehicleRealtimeRow;
+  vi.spyOn(api, 'vehicleRealtime').mockResolvedValue({ items: [runtimeRow], total: 1, limit: 50, offset: 0 });
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  render(<QueryClientProvider client={queryClient}><MemoryRouter future={ROUTER_FUTURE} initialEntries={['/monitor?mode=list']}><MonitorPage /></MemoryRouter></QueryClientProvider>);
+
+  expect(await screen.findByText('粤A12345')).toBeInTheDocument();
+  expect(screen.getByText('待识别')).toBeInTheDocument();
+  expect(screen.queryByText('当前模块暂时无法显示')).not.toBeInTheDocument();
+});
+
 test('pauses selected-vehicle polling in list mode and resumes it when returning to the map', () => {
   vi.spyOn(api, 'vehicleRealtime').mockResolvedValue({ items: vehicles, total: 2, limit: 50, offset: 0 });
   const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
@@ -446,18 +477,7 @@ test('shows a retry action when on-demand QR generation fails', async () => {
 });
 
 test('mounts only the mobile list representation and removes its viewport listener', async () => {
-  const addEventListener = vi.fn();
-  const removeEventListener = vi.fn();
-  vi.spyOn(window, 'matchMedia').mockReturnValue({
-    matches: true,
-    media: '(max-width: 760px)',
-    onchange: null,
-    addEventListener,
-    removeEventListener,
-    addListener: vi.fn(),
-    removeListener: vi.fn(),
-    dispatchEvent: vi.fn(() => false)
-  } as unknown as MediaQueryList);
+  const { addEventListener, removeEventListener } = mockMobileViewport();
   vi.spyOn(api, 'vehicleRealtime').mockResolvedValue({ items: [vehicles[0]], total: 1, limit: 50, offset: 0 });
   monitorSummaryFixture.frameToday = 2_861_323;
   const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
@@ -479,11 +499,11 @@ test('mounts only the mobile list representation and removes its viewport listen
   await waitFor(() => expect(view.container.querySelectorAll('.v2-monitor-mobile-cards .v2-monitor-mobile-card.semi-card')).toHaveLength(1));
   const mobileCard = view.container.querySelector('.v2-monitor-mobile-card');
   expect(mobileCard).toHaveAttribute('aria-label', '粤A12345 实时数据');
-  expect(mobileCard?.querySelector('.v2-monitor-mobile-primary')).toHaveTextContent('当日里程18.6 km总里程1,234 km协议来源JT/T 808');
-  expect(mobileCard?.querySelectorAll('.v2-monitor-mobile-primary > div')).toHaveLength(3);
+  expect(mobileCard?.querySelector('.v2-monitor-mobile-primary')).toHaveTextContent('速度42 km/h当日里程18.6 km总里程1,234 km协议来源JT/T 808');
+  expect(mobileCard?.querySelectorAll('.v2-monitor-mobile-primary > div')).toHaveLength(4);
   expect(mobileCard?.querySelector('.v2-monitor-mobile-location')).toHaveTextContent('113.260000, 23.130000解析位置');
   expect(view.container.querySelector('.v2-monitor-table-scroll')).not.toBeInTheDocument();
-  expect(screen.getByRole('button', { name: '在地图中定位粤A12345' })).toHaveTextContent('地图');
+  expect(screen.getByRole('button', { name: '在地图中定位粤A12345' })).toHaveTextContent('定位');
   expect(screen.getByTitle('今日上报 2,861,323 条')).toHaveTextContent('今日上报286.1万条');
   expect(view.container.querySelector('.v2-monitor-mobile-card footer')).not.toBeInTheDocument();
   expect(addEventListener).toHaveBeenCalledWith('change', expect.any(Function));
@@ -492,6 +512,27 @@ test('mounts only the mobile list representation and removes its viewport listen
   expect(removeEventListener).toHaveBeenCalledWith('change', expect.any(Function));
 });
 
+test('renders missing and multiple runtime protocol sources on mobile without crashing', async () => {
+  mockMobileViewport();
+  const runtimeRows = [{
+    ...vehicles[0],
+    protocols: null,
+    primaryProtocol: ''
+  }, {
+    ...vehicles[1],
+    protocols: ['GB32960', 'JT808'],
+    primaryProtocol: 'GB32960'
+  }] as unknown as VehicleRealtimeRow[];
+  vi.spyOn(api, 'vehicleRealtime').mockResolvedValue({ items: runtimeRows, total: 2, limit: 50, offset: 0 });
+  const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  const view = render(<QueryClientProvider client={queryClient}><MemoryRouter future={ROUTER_FUTURE} initialEntries={['/monitor?mode=list']}><MonitorPage /></MemoryRouter></QueryClientProvider>);
+
+  await waitFor(() => expect(view.container.querySelectorAll('.v2-monitor-mobile-card')).toHaveLength(2));
+  expect(screen.getByText('待识别')).toBeInTheDocument();
+  expect(screen.getByText('2 路')).toBeInTheDocument();
+  expect(screen.queryByText('当前模块暂时无法显示')).not.toBeInTheDocument();
+});
+
 test('pastes, deduplicates, and submits multiple plates as one batch search', async () => {
   const vehicleRealtime = vi.spyOn(api, 'vehicleRealtime').mockResolvedValue({ items: vehicles, total: 2, limit: 50, offset: 0 });
   const queryClient = new QueryClient({ defaultOptions: { queries: { retry: false } } });
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.tsx b/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.tsx
index fd03a282..2e19ee8d 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/MonitorPage.tsx
@@ -89,6 +89,33 @@ function hasTodayMileage(vehicle: VehicleRealtimeRow): vehicle is VehicleRealtim
   return vehicle.todayMileageAvailable === true && vehicle.todayMileageKm != null;
 }
 
+function vehicleProtocols(vehicle: VehicleRealtimeRow): string[] {
+  const runtimeValue = (vehicle as VehicleRealtimeRow & { protocols?: unknown }).protocols;
+  const normalized: string[] = [];
+  const seen = new Set<string>();
+  if (Array.isArray(runtimeValue)) {
+    for (const value of runtimeValue) {
+      if (typeof value !== 'string') continue;
+      const protocol = value.trim();
+      if (!protocol || seen.has(protocol)) continue;
+      seen.add(protocol);
+      normalized.push(protocol);
+    }
+  }
+  const primaryProtocol = typeof vehicle.primaryProtocol === 'string' ? vehicle.primaryProtocol.trim() : '';
+  if (!normalized.length && primaryProtocol) normalized.push(primaryProtocol);
+  return normalized;
+}
+
+function vehiclePrimaryProtocol(vehicle: VehicleRealtimeRow, sourceProtocols = vehicleProtocols(vehicle)) {
+  const primaryProtocol = typeof vehicle.primaryProtocol === 'string' ? vehicle.primaryProtocol.trim() : '';
+  return primaryProtocol || sourceProtocols[0] || '';
+}
+
+function vehicleProtocolSignature(vehicle: VehicleRealtimeRow) {
+  return vehicleProtocols(vehicle).join('|');
+}
+
 function formatSupportCount(value: number, compact: boolean) {
   if (!compact) return formatNumber(value);
   const absolute = Math.abs(value);
@@ -142,18 +169,20 @@ type MonitorMobileVehicleCardProps = {
 const MonitorMobileVehicleCard = memo(function MonitorMobileVehicleCard({ row, onSelect }: MonitorMobileVehicleCardProps) {
   const identity = row.plate || '未绑定车牌';
   const location = hasRealtimeLocation(row);
+  const sourceProtocols = vehicleProtocols(row);
+  const primaryProtocol = vehiclePrimaryProtocol(row, sourceProtocols);
   return <Card className="v2-monitor-mobile-card" bodyStyle={{ padding: 0 }} aria-label={`${identity} 实时数据`}>
     <header className="v2-monitor-mobile-card-header">
       <div className="v2-monitor-mobile-identity"><strong>{identity}</strong><span>{row.vin}</span></div>
       <div className="v2-monitor-card-heading-actions">
-        <b>{hasRealtimeSpeed(row) ? formatNumber(row.speedKmh, 1) : '—'}{hasRealtimeSpeed(row) ? <small>km/h</small> : null}</b>
-        <Button className="v2-monitor-card-locate" size="small" theme="light" type="primary" icon={<IconMapPin />} aria-label={`在地图中定位${identity}`} onClick={() => onSelect(row.vin)}>地图</Button>
+        <Button className="v2-monitor-card-locate" size="small" theme="light" type="primary" icon={<IconMapPin />} aria-label={`在地图中定位${identity}`} onClick={() => onSelect(row.vin)}>定位</Button>
       </div>
     </header>
     <dl className="v2-monitor-mobile-primary">
-      <div><dt>当日里程</dt><dd className="is-today">{hasTodayMileage(row) ? `${formatNumber(row.todayMileageKm, 1)} km` : '—'}</dd></div>
-      <div><dt>总里程</dt><dd>{hasRealtimeMileage(row) ? `${formatNumber(row.totalMileageKm, 1)} km` : '—'}</dd></div>
-      <div><dt>协议来源</dt><dd><span className="v2-monitor-mobile-protocol"><ProtocolTag protocol={row.primaryProtocol} compact unknownLabel="未知协议" />{row.protocols.length > 1 ? <small>{row.protocols.length} 路</small> : null}</span></dd></div>
+      <div><dt>速度</dt><dd>{hasRealtimeSpeed(row) ? <>{formatNumber(row.speedKmh, 1)}<small> km/h</small></> : '—'}</dd></div>
+      <div><dt>当日里程</dt><dd className="is-today">{hasTodayMileage(row) ? <>{formatNumber(row.todayMileageKm, 1)}<small> km</small></> : '—'}</dd></div>
+      <div><dt>总里程</dt><dd>{hasRealtimeMileage(row) ? <>{formatNumber(row.totalMileageKm, 1)}<small> km</small></> : '—'}</dd></div>
+      <div><dt>协议来源</dt><dd><span className="v2-monitor-mobile-protocol"><ProtocolTag protocol={primaryProtocol} compact unknownLabel="待识别" />{sourceProtocols.length > 1 ? <small>{sourceProtocols.length} 路</small> : null}</span></dd></div>
     </dl>
     <div className={`v2-monitor-mobile-location${location ? '' : ' is-unavailable'}`}>
       <span className="v2-monitor-mobile-coordinate"><IconMapPin aria-hidden="true" />{location ? <code>{row.longitude.toFixed(6)}, {row.latitude.toFixed(6)}</code> : <small>暂无经纬度</small>}</span>
@@ -173,7 +202,7 @@ const MonitorMobileVehicleCard = memo(function MonitorMobileVehicleCard({ row, o
     && before.mileageAvailable === after.mileageAvailable
     && before.totalMileageKm === after.totalMileageKm
     && before.primaryProtocol === after.primaryProtocol
-    && before.protocols.join('|') === after.protocols.join('|')
+    && vehicleProtocolSignature(before) === vehicleProtocolSignature(after)
     && before.locationAvailable === after.locationAvailable
     && before.longitude === after.longitude
     && before.latitude === after.latitude;
@@ -185,7 +214,10 @@ function MonitorVehicleTable({ rows, total, page, totalPages, limit, loading, er
     { title: '速度', dataIndex: 'speedKmh', width: 120, render: (_value: number, row: VehicleRealtimeRow) => <><strong className="v2-monitor-live-value">{hasRealtimeSpeed(row) ? formatNumber(row.speedKmh, 1) : '—'}</strong>{hasRealtimeSpeed(row) ? <small className="v2-monitor-live-unit">km/h</small> : null}</> },
     { title: '当日里程', dataIndex: 'todayMileageKm', width: 140, render: (_value: number, row: VehicleRealtimeRow) => <><strong className="v2-monitor-live-value is-today">{hasTodayMileage(row) ? formatNumber(row.todayMileageKm, 1) : '—'}</strong>{hasTodayMileage(row) ? <small className="v2-monitor-live-unit">km</small> : null}</> },
     { title: '总里程', dataIndex: 'totalMileageKm', width: 170, render: (_value: number, row: VehicleRealtimeRow) => <><strong className="v2-monitor-live-value">{hasRealtimeMileage(row) ? formatNumber(row.totalMileageKm, 1) : '—'}</strong>{hasRealtimeMileage(row) ? <small className="v2-monitor-live-unit">km</small> : null}</> },
-    { title: '协议来源', dataIndex: 'primaryProtocol', width: 150, render: (_value: string, row: VehicleRealtimeRow) => <div className="v2-monitor-protocol"><ProtocolTag protocol={row.primaryProtocol} compact unknownLabel="未知协议" />{row.protocols.length > 1 ? <small>+{row.protocols.length - 1} 路</small> : null}</div> },
+    { title: '协议来源', dataIndex: 'primaryProtocol', width: 150, render: (_value: string, row: VehicleRealtimeRow) => {
+      const sourceProtocols = vehicleProtocols(row);
+      return <div className="v2-monitor-protocol"><ProtocolTag protocol={vehiclePrimaryProtocol(row, sourceProtocols)} compact unknownLabel="待识别" />{sourceProtocols.length > 1 ? <small>+{sourceProtocols.length - 1} 路</small> : null}</div>;
+    } },
     { title: '经纬度', dataIndex: 'longitude', width: 190, render: (_value: number, row: VehicleRealtimeRow) => hasRealtimeLocation(row) ? <code className="v2-monitor-coordinate">{row.longitude.toFixed(6)}<br />{row.latitude.toFixed(6)}</code> : <span className="v2-monitor-unavailable">—</span> },
     { title: '地理位置', dataIndex: 'vin', render: (_value: string, row: VehicleRealtimeRow) => <MonitorAddressCell vehicle={row} /> }
   ], [onSelect]);
diff --git a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
index 9f050ce4..7c8ce9f6 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -26869,17 +26869,8 @@
     gap: 6px !important;
   }
 
-  .v2-monitor-card-heading-actions > b {
-    font-size: 15px;
-    font-weight: 740;
-  }
-
-  .v2-monitor-card-heading-actions > b small {
-    font-size: 9px;
-  }
-
   .v2-monitor-card-heading-actions > .v2-monitor-card-locate.semi-button {
-    width: 46px;
+    width: 52px;
     height: 28px;
     min-height: 28px;
     border-radius: 7px;
@@ -26889,7 +26880,7 @@
 
   .v2-monitor-mobile-cards .v2-monitor-mobile-primary {
     display: grid;
-    grid-template-columns: .9fr 1.08fr 1.12fr;
+    grid-template-columns: .72fr 1fr 1.08fr 1.2fr;
     gap: 0;
     margin: 0;
     border-top: 1px solid #edf1f5;
@@ -26935,6 +26926,12 @@
     white-space: nowrap;
   }
 
+  .v2-monitor-mobile-cards .v2-monitor-mobile-primary dd > small {
+    color: #8b99aa;
+    font-size: 8px;
+    font-weight: 600;
+  }
+
   .v2-monitor-mobile-cards .v2-monitor-mobile-primary dd.is-today {
     color: #1268df;
   }