diff --git a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
index 09dc6c3f..56936a77 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.test.tsx
@@ -218,13 +218,18 @@ test('keeps the customer directory visible on mobile and opens details on demand
   const customer = await screen.findByRole('button', { name: /选择客户 华东客户/ });
   expect(view.container.querySelector('.v2-user-mobile-picker')).not.toBeInTheDocument();
   expect(view.container.querySelector('.v2-customer-list.semi-list')).toBeInTheDocument();
-  expect(screen.getByRole('textbox', { name: '搜索客户账号' })).toBeInTheDocument();
+  expect(screen.queryByRole('textbox', { name: '搜索客户账号' })).not.toBeInTheDocument();
   expect(screen.getByRole('button', { name: '新建客户账号' })).toHaveClass('v2-workspace-mobile-tool-button', 'is-primary');
   const filterToggle = screen.getByRole('button', { name: '修改账号范围：全部状态' });
   expect(filterToggle).toHaveAttribute('aria-expanded', 'false');
   fireEvent.click(filterToggle);
-  expect(screen.getByRole('button', { name: '收起账号范围：全部状态' })).toHaveAttribute('aria-expanded', 'true');
+  expect(screen.getByRole('button', { name: '关闭账号范围：全部状态' })).toHaveAttribute('aria-expanded', 'true');
+  expect(screen.getByRole('textbox', { name: '搜索客户账号' })).toBeInTheDocument();
+  expect(document.querySelector('.v2-user-mobile-filter-sidesheet .semi-sidesheet-inner')).toHaveAttribute('aria-label', '客户账号筛选');
+  expect(document.querySelector('.v2-user-filter-panel')).not.toBeInTheDocument();
   expect(document.querySelector('.v2-user-editor-sidesheet')).not.toBeInTheDocument();
+  fireEvent.click(screen.getByRole('button', { name: '关闭客户账号筛选' }));
+  await waitFor(() => expect(screen.getByRole('button', { name: '修改账号范围：全部状态' })).toHaveAttribute('aria-expanded', 'false'));
   fireEvent.click(customer);
   expect(await screen.findByRole('button', { name: '关闭账号详情' })).toBeInTheDocument();
   expect(customer).toHaveAttribute('aria-expanded', 'true');
@@ -234,6 +239,50 @@ test('keeps the customer directory visible on mobile and opens details on demand
   expect(screen.getAllByRole('button', { name: '新建客户账号' })).toHaveLength(1);
 });
 
+test('applies mobile customer filters explicitly and discards unconfirmed draft changes', async () => {
+  layout.mobile = true;
+  mocks.adminUsers.mockResolvedValue([
+    {
+      id: 7, username: 'customer-east', displayName: '华东客户', userType: 'customer', status: 'enabled',
+      customerRef: 'east', tenantRef: '', authProvider: 'local', menuKeys: ['monitor'], vehicleVins: [],
+      vehicles: [], grantHistory: [], createdAt: '2026-07-16T00:00:00Z', updatedAt: '2026-07-16T00:00:00Z'
+    },
+    {
+      id: 8, username: 'customer-west', displayName: '西部客户', userType: 'customer', status: 'disabled',
+      customerRef: 'west', tenantRef: '', authProvider: 'local', menuKeys: ['monitor'], vehicleVins: [],
+      vehicles: [], grantHistory: [], createdAt: '2026-07-16T00:00:00Z', updatedAt: '2026-07-16T00:00:00Z'
+    }
+  ]);
+  const client = new QueryClient({ defaultOptions: { queries: { retry: false } } });
+  render(<QueryClientProvider client={client}><UsersPage /></QueryClientProvider>);
+
+  expect(await screen.findByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
+  fireEvent.click(screen.getByRole('button', { name: '修改账号范围：全部状态' }));
+  fireEvent.change(screen.getByRole('textbox', { name: '搜索客户账号' }), { target: { value: '西部' } });
+
+  expect(screen.getByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
+  fireEvent.click(screen.getByRole('button', { name: '关闭客户账号筛选' }));
+  await waitFor(() => expect(screen.getByRole('button', { name: '修改账号范围：全部状态' })).toBeInTheDocument());
+  expect(screen.getByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument();
+
+  fireEvent.click(screen.getByRole('button', { name: '修改账号范围：全部状态' }));
+  expect(screen.getByRole('textbox', { name: '搜索客户账号' })).toHaveValue('');
+  fireEvent.change(screen.getByRole('textbox', { name: '搜索客户账号' }), { target: { value: '西部' } });
+  fireEvent.click(screen.getByRole('button', { name: '应用筛选' }));
+
+  await waitFor(() => expect(screen.queryByRole('button', { name: /选择客户 华东客户/ })).not.toBeInTheDocument());
+  expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '修改账号范围：全部状态 · 西部' })).toBeInTheDocument();
+
+  fireEvent.click(screen.getByRole('button', { name: '修改账号范围：全部状态 · 西部' }));
+  fireEvent.click(screen.getByRole('button', { name: '重置条件' }));
+  await waitFor(() => expect(screen.getByRole('button', { name: /选择客户 华东客户/ })).toBeInTheDocument());
+  expect(screen.getByRole('button', { name: /选择客户 西部客户/ })).toBeInTheDocument();
+  expect(screen.getByRole('button', { name: '修改账号范围：全部状态' })).toBeInTheDocument();
+});
+
 test('keeps granted vehicles primary and reveals mobile assignment tools on demand', async () => {
   layout.mobile = true;
   const vehicles = Array.from({ length: 5 }, (_, index) => ({
diff --git a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.tsx b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.tsx
index 9ef5659c..e2944ea0 100644
--- a/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.tsx
+++ b/vehicle-data-platform/apps/web/src/v2/pages/UsersPage.tsx
@@ -6,6 +6,7 @@ import { api } from '../../api/client';
 import type { AdminUser, CustomerUserInput, CustomerVehicleGrantInput } from '../../api/types';
 import { useMobileLayout } from '../hooks/useMobileLayout';
 import { useSideSheetA11y } from '../hooks/useSideSheetA11y';
+import { MobileFilterToggle } from '../shared/MobileFilterToggle';
 import { TablePagination } from '../shared/TablePagination';
 import { VehicleCandidateList } from '../shared/VehicleCandidateList';
 import { WorkspaceFilterPanel } from '../shared/WorkspaceFilterPanel';
@@ -42,6 +43,13 @@ type CustomerAccessState = {
   attention: boolean;
 };
 
+const customerScopeOptions: Array<{ value: CustomerScopeFilter; label: string }> = [
+  { value: 'all', label: '全部状态' },
+  { value: 'enabled', label: '启用账号' },
+  { value: 'disabled', label: '停用账号' },
+  { value: 'attention', label: '待完善权限' }
+];
+
 const shanghaiDateTimeFormatter = new Intl.DateTimeFormat('sv-SE', {
   timeZone: 'Asia/Shanghai', year: 'numeric', month: '2-digit', day: '2-digit', hour: '2-digit', minute: '2-digit', hour12: false
 });
@@ -104,6 +112,8 @@ export default function UsersPage() {
   const [customerKeyword, setCustomerKeyword] = useState('');
   const deferredCustomerKeyword = useDeferredValue(customerKeyword.trim());
   const [customerStatus, setCustomerStatus] = useState<CustomerScopeFilter>('all');
+  const [draftCustomerKeyword, setDraftCustomerKeyword] = useState('');
+  const [draftCustomerStatus, setDraftCustomerStatus] = useState<CustomerScopeFilter>('all');
   const [filtersCollapsed, setFiltersCollapsed] = useState(true);
   const visibleCustomers = useMemo(() => {
     const keyword = deferredCustomerKeyword.toLocaleLowerCase('zh-CN');
@@ -139,9 +149,11 @@ export default function UsersPage() {
   const editingGrantPlate = editingGrant ? vehicleLabels[editingGrant.vin] : '';
   const grantWindowInvalid = Boolean(editingGrant && (!editingGrant.validFrom || (editingGrant.validTo && editingGrant.validTo <= editingGrant.validFrom)));
   const editorVisible = creating || Boolean(selected);
+  const mobileFiltersOpen = mobileLayout && !filtersCollapsed;
   const vehicleComposerVisible = !mobileLayout || creating || draft.vehicleGrants.length === 0 || vehicleComposerOpen;
   const hasUnsavedChanges = useMemo(() => draftSignature(draft) !== draftSignature(baselineDraft), [baselineDraft, draft]);
   const draftAccessState = customerAccessState(draft.status, draft.menuKeys.length, draft.vehicleGrants.length);
+  useSideSheetA11y(mobileFiltersOpen, '.v2-user-mobile-filter-sidesheet', 'v2-user-mobile-filters', '客户账号筛选', '关闭客户账号筛选');
   useSideSheetA11y(editorVisible, '.v2-user-editor-sidesheet', 'v2-user-editor-sheet', '客户账号详情', '关闭账号详情');
   useSideSheetA11y(Boolean(editingGrant), '.v2-user-grant-sidesheet', 'v2-user-grant-window', '车辆授权有效期', '关闭车辆授权有效期');
 
@@ -330,6 +342,32 @@ export default function UsersPage() {
     event.preventDefault();
     persistDraft();
   };
+  const openMobileFilters = () => {
+    setDraftCustomerKeyword(customerKeyword);
+    setDraftCustomerStatus(customerStatus);
+    setFiltersCollapsed(false);
+  };
+  const closeMobileFilters = () => {
+    setDraftCustomerKeyword(customerKeyword);
+    setDraftCustomerStatus(customerStatus);
+    setFiltersCollapsed(true);
+  };
+  const applyMobileFilters = () => {
+    setCustomerKeyword(draftCustomerKeyword);
+    setCustomerStatus(draftCustomerStatus);
+    setFiltersCollapsed(true);
+  };
+  const resetMobileFilters = () => {
+    setDraftCustomerKeyword('');
+    setDraftCustomerStatus('all');
+    setCustomerKeyword('');
+    setCustomerStatus('all');
+    setFiltersCollapsed(true);
+  };
+  const submitMobileFilters = (event: FormEvent) => {
+    event.preventDefault();
+    applyMobileFilters();
+  };
 
   return <div className="v2-user-admin">
     <div className="v2-user-discovery-shell">
@@ -342,18 +380,58 @@ export default function UsersPage() {
         meta={<Typography.Text type="tertiary">本地账号 · 可扩展外部身份源</Typography.Text>}
         actions={<Button className="v2-workspace-mobile-tool-button is-primary" theme="solid" icon={<IconPlus />} aria-label="新建客户账号" onClick={startCreate}>新建客户账号</Button>}
       />
-      <WorkspaceFilterPanel
+      {mobileLayout ? <div className="v2-user-mobile-discovery">
+        <MobileFilterToggle
+          title="账号范围"
+          summary={`${customerScopeLabel(customerStatus)}${customerKeyword.trim() ? ` · ${customerKeyword.trim()}` : ''}`}
+          expanded={mobileFiltersOpen}
+          expandedLabel="关闭"
+          collapsedLabel="修改"
+          onToggle={mobileFiltersOpen ? closeMobileFilters : openMobileFilters}
+        />
+        <SideSheet
+          className="v2-user-mobile-filter-sidesheet"
+          visible={mobileFiltersOpen}
+          placement="bottom"
+          height="min(62dvh, 480px)"
+          aria-label="客户账号筛选"
+          title={<div className="v2-user-mobile-filter-title"><strong>筛选客户账号</strong><span>按账号信息与权限状态缩小客户范围</span></div>}
+          onCancel={closeMobileFilters}
+          footer={<div className="v2-user-mobile-filter-footer"><Button theme="light" onClick={resetMobileFilters}>重置条件</Button><Button theme="solid" onClick={applyMobileFilters}>应用筛选</Button></div>}
+        >
+          <form className="v2-user-mobile-filter-form" onSubmit={submitMobileFilters}>
+            <section aria-label="客户账号筛选条件">
+              <header><strong>账号范围</strong><span>筛选仅在应用后更新客户目录，关闭不会丢失当前结果。</span></header>
+              <div>
+                <label>
+                  <span>客户账号</span>
+                  <Input aria-label="搜索客户账号" prefix={<IconSearch />} showClear value={draftCustomerKeyword} onChange={setDraftCustomerKeyword} placeholder="搜索名称、账号或客户标识" />
+                </label>
+                <label>
+                  <span id="v2-user-mobile-status-filter-label">访问状态</span>
+                  <Select
+                    aria-labelledby="v2-user-mobile-status-filter-label"
+                    value={draftCustomerStatus}
+                    onChange={(value) => setDraftCustomerStatus(String(value) as CustomerScopeFilter)}
+                    optionList={customerScopeOptions}
+                  />
+                </label>
+              </div>
+            </section>
+          </form>
+        </SideSheet>
+      </div> : <WorkspaceFilterPanel
         className="v2-user-filter-panel"
         title="账号范围"
         description="按客户名称、登录账号与权限可用状态查找"
         mobileSummary={`${customerScopeLabel(customerStatus)}${customerKeyword.trim() ? ` · ${customerKeyword.trim()}` : ''}`}
-        expanded={!filtersCollapsed}
+        expanded
         status={users.isPending ? '正在读取账号' : `${visibleCustomers.length} / ${customers.length} 个账号`}
         statusColor={customerKeyword.trim() || customerStatus !== 'all' ? 'blue' : 'grey'}
         collapsedLabel="修改"
         onToggle={() => setFiltersCollapsed((value) => !value)}
       >
-        <div className={`v2-user-filter-form${filtersCollapsed ? ' is-mobile-collapsed' : ''}`}>
+        <div className="v2-user-filter-form">
           <label className="v2-user-filter-keyword">
             <span>客户账号</span>
             <Input className="v2-user-list-search" aria-label="搜索客户账号" prefix={<IconSearch />} showClear value={customerKeyword} onChange={setCustomerKeyword} placeholder="搜索名称、账号或客户标识" />
@@ -364,12 +442,7 @@ export default function UsersPage() {
               aria-labelledby="v2-user-status-filter-label"
               value={customerStatus}
               onChange={(value) => setCustomerStatus(String(value) as typeof customerStatus)}
-              optionList={[
-                { value: 'all', label: '全部状态' },
-                { value: 'enabled', label: '启用账号' },
-                { value: 'disabled', label: '停用账号' },
-                { value: 'attention', label: '待完善权限' }
-              ]}
+              optionList={customerScopeOptions}
             />
           </label>
           <Button
@@ -387,7 +460,7 @@ export default function UsersPage() {
             清空
           </Button>
         </div>
-      </WorkspaceFilterPanel>
+      </WorkspaceFilterPanel>}
     </div>
     <div className={`v2-user-admin-grid${creating || selected ? ' is-editor-open' : ''}`}>
       <Card className="v2-user-list" bodyStyle={{ padding: 0 }}>
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 eb01fa82..7a262c29 100644
--- a/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
+++ b/vehicle-data-platform/apps/web/src/v2/styles/workspace.css
@@ -17378,3 +17378,146 @@
     font-weight: 700;
   }
 }
+
+/*
+ * Semi UI account directory discovery.
+ * Keep the customer list in the first viewport and apply mobile filters only
+ * after an explicit confirmation, matching alerts, access and history.
+ */
+@media (max-width: 680px) {
+  .v2-user-mobile-discovery {
+    display: grid;
+    min-width: 0;
+    flex: 0 0 auto;
+    gap: 8px;
+  }
+
+  .v2-user-mobile-discovery > .v2-mobile-filter-toggle.semi-button {
+    min-height: 58px;
+    margin: 0;
+  }
+
+  .v2-user-mobile-filter-sidesheet .semi-sidesheet-inner {
+    width: 100vw !important;
+    max-width: 100%;
+    overflow: hidden;
+    border-radius: 18px 18px 0 0;
+    background: #f4f7fb;
+    box-shadow: 0 -20px 56px rgba(25, 45, 72, .2);
+    padding-bottom: env(safe-area-inset-bottom);
+  }
+
+  .v2-user-mobile-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-header {
+    min-height: 68px;
+    border-bottom: 1px solid #dfe7f0;
+    background: rgba(255, 255, 255, .98);
+    padding: 11px 14px;
+  }
+
+  .v2-user-mobile-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-body {
+    min-height: 0;
+    overflow-y: auto;
+    background: #f4f7fb;
+    padding: 12px;
+    overscroll-behavior: contain;
+  }
+
+  .v2-user-mobile-filter-sidesheet.semi-sidesheet-bottom .semi-sidesheet-footer {
+    border-top: 1px solid #dfe7f0;
+    background: rgba(255, 255, 255, .98);
+    padding: 10px 12px calc(10px + env(safe-area-inset-bottom));
+  }
+
+  .v2-user-mobile-filter-title {
+    display: grid;
+    gap: 3px;
+  }
+
+  .v2-user-mobile-filter-title > strong {
+    color: #253a52;
+    font-size: 15px;
+    line-height: 1.3;
+  }
+
+  .v2-user-mobile-filter-title > span {
+    color: #8090a3;
+    font-size: 10px;
+    font-weight: 500;
+    line-height: 1.4;
+  }
+
+  .v2-user-mobile-filter-form {
+    display: grid;
+    gap: 10px;
+  }
+
+  .v2-user-mobile-filter-form > section {
+    display: grid;
+    gap: 12px;
+    border: 1px solid #dfe7f0;
+    border-radius: 12px;
+    background: #fff;
+    padding: 12px;
+    box-shadow: 0 8px 24px rgba(31, 53, 80, .055);
+  }
+
+  .v2-user-mobile-filter-form > section > header {
+    display: grid;
+    min-width: 0;
+    gap: 3px;
+  }
+
+  .v2-user-mobile-filter-form > section > header > strong {
+    color: #2b4058;
+    font-size: 13px;
+    line-height: 1.3;
+  }
+
+  .v2-user-mobile-filter-form > section > header > span {
+    color: #7c8b9e;
+    font-size: 10px;
+    line-height: 1.45;
+  }
+
+  .v2-user-mobile-filter-form > section > div {
+    display: grid;
+    gap: 11px;
+  }
+
+  .v2-user-mobile-filter-form label {
+    display: grid;
+    min-width: 0;
+    gap: 6px;
+    color: #5f7188;
+    font-size: 11px;
+    font-weight: 650;
+  }
+
+  .v2-user-mobile-filter-form label > .semi-input-wrapper,
+  .v2-user-mobile-filter-form label > .semi-select {
+    width: 100%;
+    min-height: 44px;
+    border-radius: 9px;
+    background: #fff;
+  }
+
+  .v2-user-mobile-filter-form .semi-input,
+  .v2-user-mobile-filter-form .semi-select-selection-text {
+    height: 42px;
+    font-size: 14px;
+  }
+
+  .v2-user-mobile-filter-footer {
+    display: grid;
+    width: 100%;
+    grid-template-columns: minmax(0, .72fr) minmax(0, 1.28fr);
+    gap: 9px;
+  }
+
+  .v2-user-mobile-filter-footer > .semi-button {
+    width: 100%;
+    min-height: 44px;
+    border-radius: 9px;
+    font-weight: 700;
+  }
+}