diff --git a/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.test.tsx
index 8fa77675..2d444961 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.test.tsx
@@ -1,5 +1,5 @@
 import { QueryClient, QueryClientProvider } from '@tanstack/react-query';
-import { cleanup, fireEvent, render, screen, waitFor } from '@testing-library/react';
+import { act, cleanup, fireEvent, render, screen, waitFor } from '@testing-library/react';
 import { afterEach, beforeEach, expect, test, vi } from 'vitest';
 import { MemoryRouter, useNavigate } from 'react-router-dom';
 import type { TrackPlaybackResponse } from '../../api/types';
@@ -316,6 +316,35 @@ test('uses the shared Semi editor SideSheet for mobile track criteria and eviden
   expect(screen.getByRole('button', { name: '关闭轨迹查询与明细' })).toBeInTheDocument();
 });
 
+test('keeps the mobile track canvas focused when the viewport crosses the responsive breakpoint', async () => {
+  let mobile = false;
+  let mobileListener: (() => void) | undefined;
+  Object.defineProperty(window, 'matchMedia', {
+    configurable: true,
+    value: vi.fn((query: string) => ({
+      get matches() { return mobile; },
+      addEventListener: (_type: string, listener: () => void) => {
+        if (query.includes('680px')) mobileListener = listener;
+      },
+      removeEventListener: vi.fn()
+    }))
+  });
+  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  const view = render(<QueryClientProvider client={client}><MemoryRouter future={ROUTER_FUTURE} initialEntries={['/tracks']}><TrackPage /></MemoryRouter></QueryClientProvider>);
+
+  expect(view.container.querySelector('.v2-track-page')).not.toHaveClass('is-mobile-layout', 'is-rail-collapsed');
+  expect(screen.getByRole('textbox', { name: '搜索轨迹车辆' })).toBeInTheDocument();
+
+  await act(async () => {
+    mobile = true;
+    mobileListener?.();
+  });
+
+  expect(view.container.querySelector('.v2-track-page')).toHaveClass('is-mobile-layout', 'is-rail-collapsed');
+  expect(document.querySelector('.v2-track-detail-sidesheet .semi-sidesheet-animation-content_hide_bottom')).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: /选择车辆/ })).toBeInTheDocument();
+});
+
 test('keeps one clear mobile query entry before a vehicle is selected', async () => {
   Object.defineProperty(window, 'matchMedia', { configurable: true, value: vi.fn(() => ({ matches: true, addEventListener: vi.fn(), removeEventListener: vi.fn() })) });
   const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.tsx b/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.tsx
index 51dfca86..e1aa1296 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/TrackPage.tsx
@@ -357,6 +357,7 @@ export default function TrackPage() {
   const [queryCollapsed, setQueryCollapsed] = useState(() => Boolean(criteria.keyword));
   const animationRef = useRef<number>();
   const lastFrameRef = useRef(0);
+  const previousMobileLayoutRef = useRef(mobileLayout);
 
   const params = useMemo(() => {
     const next = new URLSearchParams({ keyword: criteria.keyword, maxPoints: '1600' });
@@ -393,6 +394,12 @@ export default function TrackPage() {
   });
   const addressSettling = Boolean(!playing && currentAddressPoint && currentAddressPoint.key !== addressPoint?.key);
 
+  useEffect(() => {
+    const previousMobileLayout = previousMobileLayoutRef.current;
+    previousMobileLayoutRef.current = mobileLayout;
+    if (previousMobileLayout === mobileLayout || track?.points.length) return;
+    setRailCollapsed(mobileLayout);
+  }, [mobileLayout, track?.points.length]);
   useEffect(() => { setActiveIndex(0); setPlaying(false); setFollow(true); setAddressPoint(undefined); if (track?.points.length) setRailCollapsed(window.matchMedia('(max-width: 960px)').matches); }, [track?.asOf]);
   useEffect(() => {
     if (!playing || points.length < 2) return;
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 790d4a47..ce0d8f71 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -7096,6 +7096,13 @@
     display: none;
   }
 
+  .v2-mobile-navigation .v2-mobile-nav-item:focus-visible,
+  .v2-mobile-navigation > .semi-button.v2-mobile-nav-item:focus-visible {
+    outline: 2px solid rgba(18, 104, 243, .42);
+    outline-offset: -3px;
+    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .7);
+  }
+
   .v2-mobile-navigation > .semi-button.v2-mobile-nav-item .semi-button-content {
     display: flex;
     align-items: center;
@@ -25294,17 +25301,26 @@
   display: grid;
   width: 100%;
   grid-template-columns: repeat(3, minmax(0, 1fr));
-  gap: 8px;
+  gap: 0;
+  overflow: hidden;
+  border: 1px solid #e0e7f0;
+  border-radius: 12px;
+  background: linear-gradient(180deg, #fff 0%, #fbfcfe 100%);
   margin-top: 21px;
+  box-shadow: 0 8px 24px rgba(31, 48, 70, .045);
 }
 
 .v2-workspace-empty-guide-step.semi-card {
   min-width: 0;
   overflow: hidden;
-  border: 1px solid #e0e7f0;
-  border-radius: 10px;
-  background: #fff;
-  box-shadow: 0 3px 12px rgba(31, 48, 70, .04);
+  border: 0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+.v2-workspace-empty-guide-step.semi-card + .v2-workspace-empty-guide-step.semi-card {
+  border-left: 1px solid #e7edf4;
 }
 
 .v2-workspace-empty-guide-step > .semi-card-body {
@@ -25420,7 +25436,6 @@
   }
 
   .v2-workspace-empty-guide-steps.semi-card-group {
-    gap: 6px;
     margin-top: 16px;
   }