diff --git a/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts b/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
index 78ef0612..34b8fd20 100644
--- a/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
+++ b/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
@@ -117,9 +117,11 @@ describe('V2 production entry', () => {
     expect(corePageSources.MonitorPage).toContain('<Empty className="v2-monitor-table-empty"');
     expect(corePageSources.MonitorPage).toContain('<Spin size="small" tip="正在更新车辆实时数据…"');
     expect(corePageSources.MonitorPage).not.toContain('<table><thead><tr><th>车辆</th>');
-    expect(sourceEvidenceSource).toContain("import { Button, Card, Empty, Input, Spin, Tag } from '@douyinfe/semi-ui'");
+    expect(sourceEvidenceSource).toContain("import { Button, Card, Empty, Input, SideSheet, Spin, Tag } from '@douyinfe/semi-ui'");
     expect(sourceEvidenceSource).toContain('<Card className={`v2-source-evidence');
     expect(sourceEvidenceSource).toContain('<Card className={`v2-source-evidence-card');
+    expect(sourceEvidenceSource).toContain('<SideSheet');
+    expect(sourceEvidenceSource).toContain('className="v2-source-evidence-sidesheet"');
     expect(sourceEvidenceSource).toContain('<Tag className="is-recommended"');
     expect(sourceEvidenceSource).toContain('<Spin size="small"');
     expect(sourceEvidenceSource).toContain('<Empty className="v2-source-evidence-empty"');
diff --git a/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.test.tsx b/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.test.tsx
index 1dbe4e99..d4d9b0a0 100644
--- a/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.test.tsx
@@ -3,8 +3,11 @@ import { cleanup, fireEvent, render, screen, waitFor } from '@testing-library/re
 import { afterEach, expect, test, vi } from 'vitest';
 import { api } from '../../api/client';
 import type { VehicleSourceEvidence } from '../../api/types';
+import { useMobileLayout } from '../hooks/useMobileLayout';
 import { VehicleSourceEvidencePanel } from './VehicleSourceEvidencePanel';
 
+vi.mock('../hooks/useMobileLayout', () => ({ useMobileLayout: vi.fn(() => false) }));
+
 const evidence: VehicleSourceEvidence = {
   vin: 'VIN-001',
   plate: '粤A12345',
@@ -40,6 +43,7 @@ const evidence: VehicleSourceEvidence = {
 afterEach(() => {
   cleanup();
   vi.restoreAllMocks();
+  vi.mocked(useMobileLayout).mockReturnValue(false);
 });
 
 test('loads all source evidence only after the user expands it', async () => {
@@ -59,3 +63,24 @@ test('loads all source evidence only after the user expands it', async () => {
   expect(screen.queryByText('13307795425')).not.toBeInTheDocument();
   client.clear();
 });
+
+test('opens source evidence in a Semi bottom SideSheet on mobile without expanding the page card', async () => {
+  vi.mocked(useMobileLayout).mockReturnValue(true);
+  const sourceEvidence = vi.spyOn(api, 'vehicleSourceEvidence').mockResolvedValue(evidence);
+  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+
+  const view = render(<QueryClientProvider client={client}><VehicleSourceEvidencePanel vin="VIN-001" /></QueryClientProvider>);
+
+  fireEvent.click(screen.getByRole('button', { name: '查看全部来源' }));
+
+  await waitFor(() => expect(sourceEvidence).toHaveBeenCalledTimes(1));
+  expect(view.container.querySelector('.v2-source-evidence.is-mobile-sheet')).toHaveClass('is-open');
+  expect(view.container.querySelector('.v2-source-evidence > .semi-card-body > .v2-source-evidence-body')).not.toBeInTheDocument();
+  expect(await screen.findByText('北斗平台')).toBeInTheDocument();
+  expect(document.querySelector('.v2-source-evidence-sidesheet')).toBeInTheDocument();
+  expect(document.querySelectorAll('.v2-source-evidence-sidesheet .v2-source-evidence-card')).toHaveLength(3);
+
+  fireEvent.click(screen.getByRole('button', { name: '关闭来源证据' }));
+  await waitFor(() => expect(view.container.querySelector('.v2-source-evidence')).not.toHaveClass('is-open'));
+  client.clear();
+});
diff --git a/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.tsx b/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.tsx
index 79511ec9..a1e378c8 100644
--- a/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/shared/VehicleSourceEvidencePanel.tsx
@@ -1,9 +1,11 @@
 import { useQuery } from '@tanstack/react-query';
-import { Button, Card, Empty, Input, Spin, Tag } from '@douyinfe/semi-ui';
+import { Button, Card, Empty, Input, SideSheet, Spin, Tag } from '@douyinfe/semi-ui';
 import { useMemo, useState } from 'react';
 import { api } from '../../api/client';
 import type { VehicleLocationSourceEvidence, VehicleMileageSourceEvidence } from '../../api/types';
 import { protocolDisplayLabel, protocolSourceLabel } from '../domain/protocols';
+import { useMobileLayout } from '../hooks/useMobileLayout';
+import { useSideSheetA11y } from '../hooks/useSideSheetA11y';
 import { QUERY_MEMORY } from '../queryPolicy';
 
 function today() {
@@ -86,6 +88,7 @@ export function VehicleSourceEvidencePanel({
   open?: boolean;
   onOpenChange?: (open: boolean) => void;
 }) {
+  const mobileLayout = useMobileLayout();
   const [internalOpen, setInternalOpen] = useState(false);
   const expanded = open ?? internalOpen;
   const setExpanded = (value: boolean) => {
@@ -107,13 +110,9 @@ export function VehicleSourceEvidencePanel({
     if (sourceCount <= 2) return '当前车辆来源较少，仅展示实际存在的证据';
     return `已读取 ${query.data.locationSources.length} 个位置来源、${query.data.mileageSources.length} 个里程来源`;
   }, [query.data, sourceCount]);
+  useSideSheetA11y(mobileLayout && expanded, '.v2-source-evidence-sidesheet', 'v2-source-evidence-sheet', '位置与里程来源证据', '关闭来源证据');
 
-  return <Card className={`v2-source-evidence${compact ? ' is-compact' : ''}${expanded ? ' is-open' : ''}`} bodyStyle={{ padding: 0 }}>
-    <header className="v2-source-evidence-trigger">
-      <div><strong>位置与里程来源</strong><span>{description}</span></div>
-      <Button theme="light" aria-expanded={expanded} onClick={() => setExpanded(!expanded)}>{expanded ? '收起来源' : '查看全部来源'}</Button>
-    </header>
-    {expanded ? <div className="v2-source-evidence-body">
+  const evidenceBody = <div className="v2-source-evidence-body">
       <div className="v2-source-evidence-toolbar">
         <label><span>里程日期</span><Input aria-label="里程日期" type="date" value={date} max={today()} onChange={setDate} /></label>
         <small>终端已脱敏；推荐结果来自后台选举，不改动原始证据。</small>
@@ -131,6 +130,27 @@ export function VehicleSourceEvidencePanel({
         {query.data.mileageSources.length ? <section className="v2-source-evidence-group"><header><strong>{query.data.mileageDate} 里程来源</strong><span>日里程差 {number(query.data.comparison.dailyMileageDeltaKm)} km</span></header><div>{query.data.mileageSources.map((source, index) => <MileageSourceCard key={`${source.protocol}-${source.sourceLabel}-${source.terminalLabel}-${index}`} source={source} />)}</div></section> : null}
         {!query.data.locationSources.length && !query.data.mileageSources.length ? <Empty className="v2-source-evidence-empty" title="暂无来源证据" description="该车辆当前没有可展示的位置或里程来源。" /> : null}
       </> : null}
-    </div> : null}
-  </Card>;
+    </div>;
+
+  return <>
+    <Card className={`v2-source-evidence${compact ? ' is-compact' : ''}${expanded ? ' is-open' : ''}${mobileLayout ? ' is-mobile-sheet' : ''}`} bodyStyle={{ padding: 0 }}>
+      <header className="v2-source-evidence-trigger">
+        <div><strong>位置与里程来源</strong><span>{description}</span></div>
+        <Button theme="light" aria-expanded={expanded} onClick={() => setExpanded(!expanded)}>{expanded ? '收起来源' : '查看全部来源'}</Button>
+      </header>
+      {expanded && !mobileLayout ? evidenceBody : null}
+    </Card>
+    {mobileLayout ? <SideSheet
+      className="v2-source-evidence-sidesheet"
+      visible={expanded}
+      placement="bottom"
+      height="min(88dvh, 780px)"
+      aria-label="位置与里程来源证据"
+      title={<div className="v2-source-evidence-sheet-title"><strong>位置与里程来源</strong><span>{description}</span></div>}
+      footer={null}
+      onCancel={() => setExpanded(false)}
+    >
+      <div className="v2-source-evidence-sheet-body">{evidenceBody}</div>
+    </SideSheet> : null}
+  </>;
 }
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 280bb108..2929ad4e 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -16087,6 +16087,86 @@
   flex: 0 0 auto;
 }
 
+.v2-source-evidence-sidesheet .semi-sidesheet-inner {
+  overflow: hidden;
+  border-radius: 16px 16px 0 0;
+  background: #f4f7fb;
+  box-shadow: 0 -18px 48px rgba(25, 45, 72, .18);
+}
+
+.v2-source-evidence-sidesheet .semi-sidesheet-header {
+  min-height: 68px;
+  border-bottom: 1px solid #dfe7f0;
+  background: rgba(255, 255, 255, .98);
+  padding: 11px 14px;
+}
+
+.v2-source-evidence-sheet-title {
+  display: grid;
+  min-width: 0;
+  gap: 3px;
+}
+
+.v2-source-evidence-sheet-title > strong {
+  color: #1f3046;
+  font-size: 15px;
+  font-weight: 750;
+  letter-spacing: -.015em;
+}
+
+.v2-source-evidence-sheet-title > span {
+  overflow: hidden;
+  color: #7c899b;
+  font-size: 10px;
+  font-weight: 500;
+  text-overflow: ellipsis;
+  white-space: nowrap;
+}
+
+.v2-source-evidence-sidesheet .semi-sidesheet-body {
+  overflow: auto;
+  background: #f4f7fb;
+  padding: 0;
+  overscroll-behavior: contain;
+}
+
+.v2-source-evidence-sheet-body > .v2-source-evidence-body {
+  border-top: 0;
+  padding: 10px 9px 24px;
+}
+
+.v2-source-evidence-sidesheet .v2-source-evidence-toolbar {
+  position: sticky;
+  z-index: 2;
+  top: 0;
+  margin: -10px -9px 10px;
+  border-bottom: 1px solid #e2e9f1;
+  background: rgba(255, 255, 255, .97);
+  padding: 10px 12px;
+  backdrop-filter: blur(12px);
+}
+
+.v2-source-evidence-sidesheet .v2-source-evidence-summary {
+  border-color: #d9e3ee;
+  background: #fff;
+}
+
+.v2-source-evidence-sidesheet .v2-source-evidence-group > header {
+  padding-inline: 2px;
+}
+
+.v2-source-evidence-sidesheet .v2-source-evidence-group > div {
+  display: grid;
+  grid-template-columns: minmax(0, 1fr);
+  overflow: visible;
+}
+
+.v2-source-evidence-sidesheet .v2-source-evidence-card {
+  width: 100%;
+  min-width: 0;
+  flex: none;
+}
+
 .v2-vehicle-record-v3.v2-vehicle-record-page {
   display: flex;
   width: 100%;