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 dd21c979..503a363c 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
@@ -123,9 +123,12 @@ test('clears old alert rows and inspector evidence when the event scope changes'
   const view = render(<QueryClientProvider client={client}><MemoryRouter future={ROUTER_FUTURE} initialEntries={['/alerts?keyword=OLDVIN']}><AlertsPage /></MemoryRouter></QueryClientProvider>);
 
   expect((await screen.findAllByText('旧告警车牌')).length).toBeGreaterThan(0);
-  for (const className of ['v2-alert-filter-card', 'v2-alert-kpis-card', 'v2-alert-table-card']) {
+  for (const className of ['v2-alert-filter-card', 'v2-alert-kpis-card', 'v2-alert-context-card', 'v2-alert-table-card']) {
     expect(view.container.querySelector(`.${className}.semi-card`)).toBeInTheDocument();
   }
+  expect(view.container.querySelector('.v2-alert-navigation')).toBeInTheDocument();
+  expect(screen.getByText('可处置事件')).toBeInTheDocument();
+  expect(screen.queryByRole('heading', { level: 2, name: '告警中心' })).not.toBeInTheDocument();
   expect(view.container.querySelector('.v2-alert-inspector')).not.toBeInTheDocument();
   expect(view.container.querySelector('.v2-alert-workspace')).not.toHaveClass('is-inspector-open');
   expect(view.container.querySelectorAll('.v2-alert-kpis .v2-metric-action')).toHaveLength(4);
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 d79d160b..adce4c76 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/AlertsPage.tsx
@@ -8,7 +8,6 @@ import type { AlertEvent, AlertNotification, AlertQuery, AlertRule, AlertRuleInp
 import { actionLabels, alertValue, canAct, formatAlertTime, operatorLabels, ruleCondition, severityLabels, statusLabels, thresholdText } from '../domain/alert';
 import { InlineError, PanelEmpty, PanelLoading } from '../shared/AsyncState';
 import { MetricActionButton } from '../shared/MetricActionButton';
-import { PageHeader } from '../shared/PageHeader';
 import { SegmentedTabs } from '../shared/SegmentedTabs';
 import { TablePagination } from '../shared/TablePagination';
 import { WorkspacePanelHeader } from '../shared/WorkspacePanelHeader';
@@ -197,8 +196,8 @@ function EventWorkspace({ filters, draft, setDraft, setFilters, rules, unread, e
       </form>
     </WorkspaceFilterPanel>
     {summary.isError ? <InlineError message={summary.error instanceof Error ? summary.error.message : '告警汇总读取失败'} onRetry={() => summary.refetch()} /> : null}
-    <Card className="v2-alert-kpis-card" bodyStyle={{ padding: 0 }}>
-      <section className="v2-alert-kpis">{[
+    <Card className="v2-alert-kpis-card v2-alert-context-card" bodyStyle={{ padding: 0 }}>
+      <section className="v2-alert-kpis" aria-label="活跃告警概览">{[
         { label: '活跃告警', value: sums?.active, tone: 'active', status: '' },
         { label: '未处理', value: sums?.unprocessed, tone: 'unprocessed', status: 'unprocessed' },
         { label: '处理中', value: sums?.processing, tone: 'processing', status: 'processing' },
@@ -218,7 +217,12 @@ function EventWorkspace({ filters, draft, setDraft, setFilters, rules, unread, e
     {events.isError ? <InlineError message={events.error instanceof Error ? events.error.message : '告警事件读取失败'} onRetry={() => events.refetch()} /> : null}
     <div className={`v2-alert-workspace${selectedID && !mobileLayout ? ' is-inspector-open' : ''}`}>
       <Card className="v2-alert-table-card" bodyStyle={{ padding: 0 }}>
-        <WorkspacePanelHeader title="告警事件" meta={`共 ${(events.data?.total ?? 0).toLocaleString('zh-CN')} 条`} actions={<Button theme="borderless" icon={<IconRefresh />} onClick={() => Promise.all([events.refetch(), summary.refetch(), ...(selectedID ? [detail.refetch()] : [])])}>刷新</Button>} />
+        <WorkspacePanelHeader
+          title="告警事件"
+          description="点击事件查看触发证据、处理进度与处置动作"
+          meta={`共 ${(events.data?.total ?? 0).toLocaleString('zh-CN')} 条`}
+          actions={<Button theme="borderless" icon={<IconRefresh />} loading={events.isFetching} onClick={() => Promise.all([events.refetch(), summary.refetch(), ...(selectedID ? [detail.refetch()] : [])])}>刷新</Button>}
+        />
         <div className="v2-alert-table-scroll">
           {mobileLayout
             ? <div className="v2-alert-mobile-list">{rows.map((event) => <Card key={event.id} className={`v2-alert-mobile-card${selectedID === event.id ? ' is-selected' : ''}`} bodyStyle={{ padding: 0 }}><Button theme="borderless" type="tertiary" className="v2-alert-mobile-action" aria-pressed={selectedID === event.id} aria-expanded={selectedID === event.id} aria-label={`查看 ${event.plate || event.vin} ${event.ruleName} 告警详情`} onClick={() => setSelection({ scope: eventScope, id: event.id })}><span className="v2-alert-mobile-card-content"><header><strong>{event.plate || '未绑定车牌'}</strong><span><SeverityTag severity={event.severity} /><StatusTag status={event.status} /></span></header><p>{event.ruleName}</p><dl><div><dt>触发时间</dt><dd>{formatAlertTime(event.triggeredAt)}</dd></div><div><dt>数据来源</dt><dd>{event.protocol || '—'}</dd></div><div><dt>触发值</dt><dd>{alertValue(event)}</dd></div><div><dt>阈值</dt><dd>{thresholdText(event)}</dd></div></dl><footer>查看处置详情<IconChevronRight /></footer></span></Button></Card>)}</div>
@@ -406,5 +410,5 @@ export default function AlertsPage() {
   const setTab = (next: Tab) => { setTabState(next); const copy = new URLSearchParams(params); copy.set('tab', next); setParams(copy, { replace: true }); };
   const setFilters = (next: Filters) => { setFilterState(next); const copy = new URLSearchParams(); if (tab !== 'events') copy.set('tab', tab); Object.entries(next).forEach(([key, value]) => { if (value) copy.set(key, value); }); setParams(copy, { replace: true }); };
   const tabs = [{ key: 'events' as const, label: '告警事件', icon: <IconAlarm /> }, ...(admin ? [{ key: 'rules' as const, label: '规则配置' }] : []), { key: 'notifications' as const, label: '站内通知', icon: <IconBell />, count: unread || undefined }];
-  return <div className="v2-alert-page"><PageHeader title="告警中心" description="统一监控车辆运行异常，串联触发证据、处理进度与通知状态。" status={unread ? `${unread} 条未读` : '通知已读'} statusColor={unread ? 'orange' : 'green'} meta={<Typography.Text type="tertiary">{operator ? '可处置事件' : '只读查看'}</Typography.Text>} /><SegmentedTabs className="v2-alert-tabs" variant="filled" ariaLabel="告警中心分类" value={activeTab} items={tabs} onChange={setTab} />{activeTab !== 'notifications' && rules.isError ? <InlineError message={rules.error.message} onRetry={() => rules.refetch()} /> : null}{activeTab === 'rules' && metrics.isError ? <InlineError message={metrics.error.message} onRetry={() => metrics.refetch()} /> : null}{activeTab === 'events' ? <EventWorkspace filters={filters} draft={eventDraft} setDraft={setEventDraft} setFilters={setFilters} rules={rules.data ?? []} unread={unread} editable={operator} onTab={setTab} /> : activeTab === 'rules' ? <RulesWorkspace rules={rules.data ?? []} metrics={metrics.data?.metrics ?? []} /> : <NotificationsWorkspace editable={operator} notifications={notifications} />}</div>;
+  return <div className="v2-alert-page"><div className="v2-alert-navigation"><SegmentedTabs className="v2-alert-tabs" variant="filled" ariaLabel="告警中心分类" value={activeTab} items={tabs} onChange={setTab} /><div className="v2-alert-navigation-meta"><Typography.Text type="tertiary">{operator ? '可处置事件' : '只读查看'}</Typography.Text><Tag color={unread ? 'orange' : 'green'} type="light" size="small">{unread ? `${unread.toLocaleString('zh-CN')} 条未读` : '通知已读'}</Tag></div></div>{activeTab !== 'notifications' && rules.isError ? <InlineError message={rules.error.message} onRetry={() => rules.refetch()} /> : null}{activeTab === 'rules' && metrics.isError ? <InlineError message={metrics.error.message} onRetry={() => metrics.refetch()} /> : null}{activeTab === 'events' ? <EventWorkspace filters={filters} draft={eventDraft} setDraft={setEventDraft} setFilters={setFilters} rules={rules.data ?? []} unread={unread} editable={operator} onTab={setTab} /> : activeTab === 'rules' ? <RulesWorkspace rules={rules.data ?? []} metrics={metrics.data?.metrics ?? []} /> : <NotificationsWorkspace editable={operator} notifications={notifications} />}</div>;
 }
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 b5e8788e..26706a67 100644
--- a/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
+++ b/vehicle-data-platform/apps/web/src/v2/productionEntry.test.ts
@@ -55,11 +55,11 @@ describe('V2 production entry', () => {
       expect(source).toContain("from '@douyinfe/semi-ui'");
       expect(source).toContain('<Button');
     }
-    for (const name of ['VehiclePage', 'AlertsPage', 'AccessPage', 'UsersPage', 'OperationsPage']) {
+    for (const name of ['VehiclePage', 'AccessPage', 'UsersPage', 'OperationsPage']) {
       expect(corePageSources[name]).toContain("from '../shared/PageHeader'");
       expect(corePageSources[name]).toContain('<PageHeader');
     }
-    for (const name of ['HistoryPage', 'StatisticsPage']) {
+    for (const name of ['AlertsPage', 'HistoryPage', 'StatisticsPage']) {
       expect(corePageSources[name]).not.toContain("from '../shared/PageHeader'");
       expect(corePageSources[name]).not.toContain('<PageHeader');
     }
@@ -150,10 +150,10 @@ describe('V2 production entry', () => {
     expect(corePageSources.AlertsPage).toContain('<TextArea');
     expect(corePageSources.AlertsPage).toContain('<Radio');
     expect(corePageSources.AlertsPage).toContain('<Card key={event.id} className={`v2-alert-mobile-card');
-    for (const surface of ['v2-alert-kpis-card', 'v2-alert-table-card']) {
-      expect(corePageSources.AlertsPage).toContain(`<Card className="${surface}"`);
-    }
+    expect(corePageSources.AlertsPage).toContain('<Card className="v2-alert-kpis-card v2-alert-context-card"');
+    expect(corePageSources.AlertsPage).toContain('<Card className="v2-alert-table-card"');
     expect(corePageSources.AlertsPage).toContain('<Card className={`v2-alert-inspector');
+    expect(corePageSources.AlertsPage).toContain('className="v2-alert-navigation"');
     expect(corePageSources.AlertsPage).toContain('<SideSheet\n      className="v2-alert-filter-sidesheet"');
     expect(corePageSources.AlertsPage).toContain('<SideSheet\n      className="v2-alert-detail-sidesheet"');
     expect(corePageSources.AlertsPage).toContain('className="v2-alert-event-table"');
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 1f93e56f..c46daf55 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -5835,3 +5835,671 @@
     padding: 11px;
   }
 }
+
+/*
+ * Semi UI alert workspace — list first, evidence on demand.
+ * The shell already owns the page title, so the route begins with one compact
+ * command rail and reserves the remaining height for the operational list.
+ */
+.v2-alert-page {
+  gap: 9px;
+  padding: 12px 18px 16px;
+  background: #f6f8fb;
+}
+
+.v2-alert-navigation {
+  display: flex;
+  min-height: 46px;
+  flex: 0 0 auto;
+  align-items: center;
+  justify-content: space-between;
+  gap: 14px;
+  overflow: hidden;
+  border: 1px solid #dce4ed;
+  border-radius: 10px;
+  background: #fff;
+  padding: 4px 8px 4px 4px;
+  box-shadow: 0 3px 12px rgba(31, 53, 80, .04);
+}
+
+.v2-alert-navigation .v2-alert-tabs.v2-segmented-tabs {
+  width: auto;
+  min-height: 36px;
+  flex: 0 1 auto;
+  grid-auto-columns: minmax(126px, 1fr);
+  border: 0;
+  border-radius: 7px;
+  background: #f2f5f9;
+  padding: 3px;
+  box-shadow: none;
+}
+
+.v2-alert-navigation .v2-alert-tabs.v2-segmented-tabs > .semi-button {
+  min-height: 32px;
+  border-radius: 6px;
+  font-size: 12px;
+}
+
+.v2-alert-navigation-meta {
+  display: flex;
+  min-width: 0;
+  align-items: center;
+  justify-content: flex-end;
+  gap: 9px;
+  white-space: nowrap;
+}
+
+.v2-alert-navigation-meta > .semi-typography {
+  color: #7d899a;
+  font-size: 11px;
+}
+
+.v2-alert-navigation-meta > .semi-tag {
+  min-height: 24px;
+  border-radius: 6px;
+  font-size: 10px;
+}
+
+.v2-alert-filter-card.semi-card,
+.v2-alert-context-card.semi-card,
+.v2-alert-table-card.semi-card,
+.v2-alert-inspector.semi-card,
+.v2-alert-rule-list.semi-card,
+.v2-alert-rule-editor.semi-card,
+.v2-alert-notifications.semi-card {
+  border-color: #dce4ed;
+  border-radius: 9px;
+  box-shadow: 0 3px 14px rgba(31, 53, 80, .045);
+}
+
+.v2-alert-filter-card.semi-card {
+  overflow: visible;
+}
+
+.v2-alert-filter-card > .semi-card-body > .v2-workspace-filter-heading {
+  display: none;
+}
+
+.v2-alert-filter.v2-alert-filter-primary {
+  min-height: 60px;
+  grid-template-columns: minmax(250px, 1.45fr) minmax(122px, .62fr) minmax(136px, .68fr) auto auto auto;
+  gap: 8px;
+  padding: 9px 11px;
+}
+
+.v2-alert-filter.v2-alert-filter-primary label {
+  gap: 4px;
+  font-size: 10px;
+}
+
+.v2-alert-filter.v2-alert-filter-primary label > div,
+.v2-alert-filter.v2-alert-filter-primary .semi-select,
+.v2-alert-filter.v2-alert-filter-primary .semi-input-wrapper,
+.v2-alert-filter.v2-alert-filter-primary > .semi-button {
+  min-height: 34px;
+  border-radius: 7px;
+}
+
+.v2-alert-filter.v2-alert-filter-primary .semi-input,
+.v2-alert-filter.v2-alert-filter-primary .semi-select-selection-text,
+.v2-alert-filter.v2-alert-filter-primary > .semi-button {
+  font-size: 12px;
+}
+
+.v2-alert-context-card.semi-card {
+  min-height: 64px;
+  flex: 0 0 auto;
+  overflow: hidden;
+}
+
+.v2-alert-context-card > .semi-card-body {
+  display: grid;
+  height: 100%;
+  grid-template-columns: minmax(0, 1fr) 278px;
+}
+
+.v2-alert-context-card .v2-alert-kpis,
+.v2-alert-context-card .v2-alert-kpis .v2-metric-action-content {
+  min-height: 64px;
+}
+
+.v2-alert-context-card .v2-alert-kpis small {
+  font-size: 10px;
+}
+
+.v2-alert-context-card .v2-alert-kpis strong {
+  margin-top: 5px;
+  font-size: 19px;
+}
+
+.v2-alert-context-card .v2-alert-secondary-states {
+  padding: 6px;
+  gap: 4px;
+}
+
+.v2-alert-context-card .v2-alert-secondary-states > .semi-button {
+  border-radius: 6px;
+  padding: 5px 6px;
+}
+
+.v2-alert-context-card .v2-alert-secondary-states span {
+  font-size: 9px;
+}
+
+.v2-alert-context-card .v2-alert-secondary-states b {
+  font-size: 14px;
+}
+
+.v2-alert-workspace {
+  min-height: 0;
+  flex: 1 1 0;
+  gap: 9px;
+}
+
+.v2-alert-workspace.is-inspector-open {
+  grid-template-columns: minmax(680px, 1fr) 370px;
+}
+
+.v2-alert-table-card > .semi-card-body > .v2-workspace-panel-header {
+  min-height: 48px;
+  padding: 7px 12px;
+}
+
+.v2-alert-table-card .v2-workspace-panel-copy {
+  gap: 1px;
+}
+
+.v2-alert-table-card .v2-workspace-panel-copy > h5.semi-typography {
+  font-size: 14px;
+}
+
+.v2-alert-table-card .v2-workspace-panel-copy > .semi-typography {
+  color: #8793a4;
+  font-size: 9px;
+}
+
+.v2-alert-table-card .v2-workspace-panel-actions > .semi-button {
+  min-height: 30px;
+  border-radius: 6px;
+  font-size: 11px;
+}
+
+.v2-alert-table-scroll {
+  scrollbar-color: #aebdce transparent;
+  scrollbar-width: thin;
+}
+
+.v2-alert-table-scroll::-webkit-scrollbar {
+  width: 10px;
+  height: 10px;
+}
+
+.v2-alert-table-scroll::-webkit-scrollbar-thumb {
+  border: 2px solid transparent;
+  border-radius: 999px;
+  background: #aebdce;
+  background-clip: padding-box;
+}
+
+.v2-alert-table-scroll .v2-alert-event-table.semi-table-wrapper .semi-table-thead > .semi-table-row > .semi-table-row-head {
+  height: 38px;
+  background: #f7f9fc;
+  font-size: 10px;
+}
+
+.v2-alert-table-scroll .v2-alert-event-table.semi-table-wrapper .semi-table-tbody > .semi-table-row > .semi-table-row-cell {
+  height: 46px;
+  padding: 6px 9px;
+  font-size: 11px;
+}
+
+.v2-alert-table-card > .semi-card-body > footer {
+  min-height: 42px;
+  padding: 5px 10px;
+}
+
+.v2-alert-table-card > .semi-card-body > footer button,
+.v2-alert-table-card > .semi-card-body > footer select {
+  height: 28px;
+  font-size: 11px;
+}
+
+.v2-alert-inspector.semi-card {
+  background: #f7f9fc;
+}
+
+.v2-alert-inspector > .semi-card-body {
+  display: flex;
+  height: 100%;
+  min-height: 0;
+  flex-direction: column;
+}
+
+.v2-alert-inspector > .semi-card-body > .v2-alert-inspector-heading {
+  min-height: 58px;
+  padding: 8px 11px;
+}
+
+.v2-alert-inspector-content {
+  min-height: 0;
+  flex: 1 1 auto;
+  gap: 0;
+  overflow: auto;
+  padding: 0 10px 10px;
+}
+
+.v2-alert-inspector-content > .v2-alert-detail-card.semi-card {
+  flex: 0 0 auto;
+  overflow: visible;
+}
+
+.v2-alert-detail-card.semi-card {
+  border-width: 0 0 1px;
+  border-color: #e4e9f0;
+  border-radius: 0;
+  background: transparent;
+  box-shadow: none;
+}
+
+.v2-alert-detail-card > .semi-card-header {
+  min-height: 40px;
+  border-bottom: 0;
+  padding: 0 2px;
+}
+
+.v2-alert-detail-card > .semi-card-body {
+  border: 1px solid #e1e7ef;
+  border-radius: 7px;
+  background: #fff;
+}
+
+.v2-alert-detail-card.v2-alert-progress-card > .semi-card-body,
+.v2-alert-detail-card.v2-alert-disposition-card > .semi-card-body {
+  padding: 10px !important;
+}
+
+.v2-alert-inspector > .semi-card-body > .v2-alert-links {
+  min-height: 46px;
+  padding: 6px 10px;
+}
+
+.v2-alert-inspector > .semi-card-body > .v2-alert-links a {
+  min-height: 32px;
+}
+
+.v2-alert-rules {
+  min-height: 0;
+  flex: 1 1 0;
+  grid-template-columns: minmax(300px, 340px) minmax(600px, 1fr);
+  gap: 9px;
+}
+
+.v2-alert-rule-list.semi-card,
+.v2-alert-rule-editor.semi-card {
+  overflow: hidden;
+}
+
+.v2-alert-rule-list > .semi-card-body,
+.v2-alert-rule-editor > .semi-card-body,
+.v2-alert-rule-editor-form {
+  height: 100%;
+  min-height: 0;
+}
+
+.v2-alert-rule-list > .semi-card-body,
+.v2-alert-rule-editor-form {
+  display: flex;
+  flex-direction: column;
+}
+
+.v2-alert-rule-items,
+.v2-alert-rule-editor-form {
+  min-height: 0;
+}
+
+.v2-alert-rule-items {
+  flex: 1 1 auto;
+  overflow: auto;
+}
+
+.v2-alert-rule-editor-form {
+  overflow: auto;
+}
+
+.v2-alert-rule-list > .semi-card-body > .v2-alert-rule-list-heading,
+.v2-alert-rule-editor-form > .v2-alert-rule-editor-heading {
+  min-height: 56px;
+  padding: 8px 12px;
+}
+
+.v2-alert-rule-item.semi-button {
+  min-height: 68px;
+  padding: 8px 11px;
+}
+
+.v2-alert-rule-copy > small {
+  margin-top: 5px;
+}
+
+.v2-alert-rule-templates {
+  padding: 11px 12px;
+}
+
+.v2-alert-template-card.semi-button {
+  min-height: 72px;
+  padding: 9px;
+}
+
+.v2-rule-form-grid {
+  gap: 11px 13px;
+  padding: 13px 14px 16px;
+}
+
+.v2-alert-rule-editor-form > footer {
+  position: sticky;
+  z-index: 3;
+  bottom: 0;
+  min-height: 56px;
+  background: rgba(255, 255, 255, .97);
+  padding: 8px 14px;
+  backdrop-filter: blur(10px);
+}
+
+.v2-alert-notifications.semi-card {
+  min-height: 0;
+  flex: 1 1 0;
+  overflow: hidden;
+}
+
+.v2-alert-notifications > .semi-card-body {
+  display: grid;
+  height: 100%;
+  min-height: 0;
+  max-height: none;
+  grid-template-rows: 54px minmax(0, 1fr) auto;
+  overflow: hidden;
+}
+
+.v2-alert-notifications > .semi-card-body > .v2-workspace-panel-header {
+  min-height: 54px;
+  padding: 8px 12px;
+}
+
+.v2-alert-notification-list {
+  min-height: 0;
+  overflow: auto;
+  padding: 9px;
+}
+
+.v2-alert-notification-cards.semi-card-group {
+  grid-template-columns: repeat(2, minmax(0, 1fr));
+  gap: 9px;
+}
+
+.v2-alert-channel-card.semi-card {
+  border-width: 1px 0 0;
+  border-radius: 0;
+  box-shadow: none;
+}
+
+.v2-alert-channel-card > .semi-card-header {
+  min-height: 34px;
+  padding: 0 12px;
+}
+
+.v2-alert-channel-descriptions.semi-descriptions {
+  padding: 5px 9px 8px;
+}
+
+.v2-alert-channel-descriptions table {
+  width: 100%;
+}
+
+.v2-alert-channel-descriptions tbody {
+  display: grid;
+  grid-template-columns: repeat(3, minmax(0, 1fr));
+  gap: 6px;
+}
+
+.v2-alert-channel-descriptions tr {
+  display: flex;
+  min-width: 0;
+  min-height: 32px;
+  align-items: center;
+  justify-content: space-between;
+  gap: 6px;
+  border: 1px solid #e4e9f0;
+  border-radius: 6px;
+  background: #fafbfd;
+  padding: 4px 7px;
+}
+
+.v2-alert-channel-descriptions .semi-descriptions-item {
+  min-height: 0;
+  padding: 0;
+}
+
+.v2-alert-channel-descriptions .semi-descriptions-item-th {
+  width: auto;
+  padding-right: 0;
+}
+
+@media (max-width: 1180px) and (min-width: 681px) {
+  .v2-alert-filter.v2-alert-filter-primary {
+    grid-template-columns: minmax(220px, 1fr) 120px 130px auto auto auto;
+  }
+
+  .v2-alert-filter.v2-alert-filter-primary > .semi-button {
+    padding-inline: 9px;
+  }
+}
+
+@media (max-width: 900px) and (min-width: 681px) {
+  .v2-alert-page {
+    height: 100%;
+    min-height: 0;
+    overflow: hidden;
+  }
+
+  .v2-alert-workspace {
+    display: grid;
+    min-height: 0;
+    flex: 1 1 0;
+  }
+
+  .v2-alert-table-card {
+    min-height: 0;
+  }
+}
+
+@media (max-width: 680px) {
+  .v2-alert-page {
+    gap: 8px;
+    overflow: auto;
+    padding: 8px 7px 16px;
+  }
+
+  .v2-alert-navigation {
+    position: sticky;
+    z-index: 8;
+    top: 0;
+    min-height: 46px;
+    border-radius: 9px;
+    padding: 3px;
+  }
+
+  .v2-alert-navigation .v2-alert-tabs.v2-segmented-tabs {
+    position: static;
+    width: 100%;
+    min-height: 38px;
+    grid-auto-columns: minmax(104px, 1fr);
+    overflow-x: auto;
+  }
+
+  .v2-alert-navigation .v2-alert-tabs.v2-segmented-tabs > .semi-button {
+    min-height: 32px;
+    padding-inline: 7px;
+    font-size: 10px;
+  }
+
+  .v2-alert-navigation-meta {
+    display: none;
+  }
+
+  .v2-alert-filter-card > .semi-card-body > .v2-workspace-filter-heading {
+    display: flex;
+  }
+
+  .v2-alert-filter.v2-alert-filter-primary {
+    min-height: 0;
+    grid-template-columns: 1fr 1fr;
+    gap: 8px;
+    padding: 9px;
+  }
+
+  .v2-alert-filter.v2-alert-filter-primary label:first-child {
+    grid-column: 1 / -1;
+  }
+
+  .v2-alert-filter.v2-alert-filter-primary > .semi-button {
+    min-height: 40px;
+  }
+
+  .v2-alert-filter.v2-alert-filter-primary > .v2-secondary-button {
+    display: none;
+  }
+
+  .v2-alert-context-card.semi-card {
+    min-height: 0;
+  }
+
+  .v2-alert-context-card > .semi-card-body {
+    display: block;
+  }
+
+  .v2-alert-context-card .v2-alert-kpis {
+    min-height: 88px;
+    grid-template-columns: repeat(4, minmax(0, 1fr));
+  }
+
+  .v2-alert-context-card .v2-alert-kpis .v2-metric-action,
+  .v2-alert-context-card .v2-alert-kpis .v2-metric-action-content {
+    min-height: 44px;
+  }
+
+  .v2-alert-context-card .v2-alert-secondary-states {
+    border-top: 1px solid #e4e9f0;
+    border-left: 0;
+    padding: 4px;
+  }
+
+  .v2-alert-context-card .v2-alert-secondary-states > .semi-button {
+    min-height: 40px;
+    padding: 3px 5px;
+  }
+
+  .v2-alert-table-card {
+    min-height: 460px;
+  }
+
+  .v2-alert-table-card > .semi-card-body > .v2-workspace-panel-header {
+    min-height: 58px;
+    align-items: flex-start;
+    padding: 8px;
+  }
+
+  .v2-alert-table-card .v2-workspace-panel-copy > .semi-typography {
+    display: none;
+  }
+
+  .v2-alert-mobile-list {
+    gap: 7px;
+    padding: 7px;
+  }
+
+  .v2-alert-mobile-card-content {
+    padding: 11px;
+  }
+
+  .v2-alert-mobile-card-content p {
+    margin: 6px 0;
+  }
+
+  .v2-alert-mobile-card-content dl {
+    gap: 6px 10px;
+    padding-top: 7px;
+  }
+
+  .v2-alert-mobile-card-content dl > div {
+    display: grid;
+    min-width: 0;
+    min-height: 24px;
+    grid-template-columns: auto minmax(0, 1fr);
+    align-items: center;
+    gap: 6px;
+  }
+
+  .v2-alert-mobile-card-content dd {
+    min-width: 0;
+    margin: 0;
+    overflow: hidden;
+    text-align: right;
+    text-overflow: ellipsis;
+    white-space: nowrap;
+  }
+
+  .v2-alert-mobile-card-content footer {
+    margin-top: 6px;
+  }
+
+  .v2-alert-rules {
+    display: flex;
+    flex: none;
+    flex-direction: column;
+    overflow: visible;
+  }
+
+  .v2-alert-rule-list {
+    max-height: 270px;
+  }
+
+  .v2-alert-rule-editor.semi-card,
+  .v2-alert-rule-editor-form {
+    overflow: visible;
+  }
+
+  .v2-alert-rule-editor-form > footer {
+    position: static;
+  }
+
+  .v2-alert-notifications.semi-card {
+    min-height: 540px;
+    flex: none;
+  }
+
+  .v2-alert-notification-cards.semi-card-group {
+    grid-template-columns: 1fr;
+  }
+
+  .v2-alert-channel-descriptions tbody {
+    display: table-row-group;
+  }
+
+  .v2-alert-channel-descriptions tr {
+    display: table-row;
+    min-height: initial;
+    border: 0;
+    background: transparent;
+    padding: 0;
+  }
+
+  .v2-alert-channel-descriptions .semi-descriptions-item {
+    min-height: 32px;
+    padding: 4px 0;
+  }
+
+  .v2-alert-channel-descriptions .semi-descriptions-item-th {
+    width: 135px;
+    padding-right: 10px;
+  }
+}