diff --git a/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.test.tsx
index e0087eb5..f3dcbf42 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.test.tsx
@@ -237,6 +237,8 @@ test('renders only selectable Semi alert cards on mobile', async () => {
   expect(action).toHaveAttribute('aria-pressed', 'true');
   expect(action).toHaveAttribute('aria-expanded', 'true');
   expect(await screen.findByRole('dialog', { name: '告警事件详情' })).toBeInTheDocument();
+  expect(document.querySelector('.v2-alert-detail-sidesheet')).toHaveClass('semi-sidesheet-bottom');
+  expect(document.querySelector('.v2-alert-detail-sidesheet .semi-sidesheet-inner')).toHaveStyle({ height: 'min(86dvh, 760px)' });
   expect(await screen.findByText('mobile-event')).toBeInTheDocument();
   fireEvent.click(screen.getByRole('button', { name: '关闭告警详情' }));
   expect(screen.queryByText('mobile-event')).not.toBeInTheDocument();
@@ -265,6 +267,23 @@ test('keeps the primary alert query compact and applies advanced filters from a
   expect(screen.getByRole('button', { name: /更多筛选 · 1/ })).toHaveAttribute('aria-expanded', 'false');
 });
 
+test('uses the shared Semi bottom SideSheet pattern for mobile advanced filters', async () => {
+  layout.mobile = true;
+  mocks.alertSummaryV2.mockResolvedValue({ active: 0, unprocessed: 0, processing: 0, recovered: 0, closed: 0, ignored: 0, unreadNotifications: 0, asOf: '' });
+  mocks.alertEventsV2.mockResolvedValue({ items: [], total: 0, limit: 20, offset: 0 });
+  mocks.alertRulesV2.mockResolvedValue([alertRule()]);
+  mocks.alertNotificationsV2.mockResolvedValue({ items: [], total: 0, limit: 100, offset: 0 });
+  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  render(<QueryClientProvider client={client}><MemoryRouter future={ROUTER_FUTURE} initialEntries={['/alerts']}><AlertsPage /></MemoryRouter></QueryClientProvider>);
+
+  await screen.findByText('当前筛选条件没有告警事件');
+  fireEvent.click(screen.getByRole('button', { name: /更多筛选/ }));
+
+  expect(await screen.findByRole('dialog', { name: '告警高级筛选' })).toBeInTheDocument();
+  expect(document.querySelector('.v2-alert-filter-sidesheet')).toHaveClass('semi-sidesheet-bottom');
+  expect(document.querySelector('.v2-alert-filter-sidesheet .semi-sidesheet-inner')).toHaveStyle({ height: 'min(72dvh, 620px)' });
+});
+
 test('creates auditable drafts from simple offline and hydrogen rule templates', async () => {
   mocks.alertRulesV2.mockResolvedValue([alertRule()]);
   mocks.metricCatalog.mockResolvedValue({
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx b/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx
index c8288e4f..eea84c32 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx
@@ -268,7 +268,9 @@ function EventWorkspace({ filters, draft, setDraft, setFilters, rules, unread, e
       className="v2-alert-filter-sidesheet"
       visible={advancedOpen}
       aria-label="告警高级筛选"
-      width={430}
+      placement={mobileLayout ? 'bottom' : 'right'}
+      width={mobileLayout ? undefined : 430}
+      height={mobileLayout ? 'min(72dvh, 620px)' : undefined}
       title={<div className="v2-alert-sheet-title"><strong>更多筛选</strong><span>按规则、协议和触发时间收窄告警范围</span></div>}
       onCancel={() => setAdvancedOpen(false)}
       footer={<div className="v2-alert-sheet-footer"><Button theme="light" onClick={() => setDraft({ ...draft, ruleId: '', protocol: '', dateFrom: '', dateTo: '' })}>清空高级条件</Button><Button theme="solid" onClick={() => { applyDraft(); setAdvancedOpen(false); }}>应用筛选</Button></div>}
@@ -284,7 +286,8 @@ function EventWorkspace({ filters, draft, setDraft, setFilters, rules, unread, e
       className="v2-alert-detail-sidesheet"
       visible={mobileLayout && Boolean(selectedID)}
       aria-label="告警事件详情"
-      width="100%"
+      placement="bottom"
+      height="min(86dvh, 760px)"
       title={<div className="v2-alert-sheet-title"><strong>告警详情</strong><span>{selectedEvent ? `${selectedEvent.plate || selectedEvent.vin} · ${selectedEvent.ruleName}` : '证据、状态与处置履历'}</span></div>}
       onCancel={closeDetail}
     >
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 edd2c177..592f751d 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -1826,6 +1826,30 @@
     width: 100% !important;
   }
 
+  .v2-alert-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-header,
+  .v2-alert-detail-sidesheet.semi-sidesheet-bottom .semi-sidesheet-header {
+    min-height: 72px;
+    padding: 15px 16px 12px;
+  }
+
+  .v2-alert-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-body {
+    padding: 12px 14px 16px;
+  }
+
+  .v2-alert-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-footer {
+    padding: 10px 14px calc(10px + env(safe-area-inset-bottom));
+  }
+
+  .v2-alert-detail-sidesheet.semi-sidesheet-bottom .semi-sidesheet-body {
+    overflow: auto;
+    overscroll-behavior: contain;
+  }
+
+  .v2-alert-detail-sidesheet.semi-sidesheet-bottom .v2-alert-inspector.is-sheet.semi-card {
+    border-radius: 11px 11px 0 0;
+    background: transparent;
+  }
+
   .v2-alert-sheet-footer {
     width: 100%;
   }