diff --git a/internal/httpapi/api.go b/internal/httpapi/api.go
index 49c242d..0fe52c5 100644
--- a/internal/httpapi/api.go
+++ b/internal/httpapi/api.go
@@ -45,6 +45,7 @@ func (a *API) Register(mux *http.ServeMux) {
 	mux.HandleFunc("/v1/customer-services/", a.customerServiceResource)
 	mux.HandleFunc("/v1/notices", a.notices)
 	mux.HandleFunc("/v1/notices/popup", a.popupNotice)
+	mux.HandleFunc("/v1/notices/pending", a.pendingNotice)
 	mux.HandleFunc("/v1/notices/", a.noticeResource)
 	mux.HandleFunc("/v1/task-halls", a.taskHalls)
 	mux.HandleFunc("/v1/tasks/eligibility", a.taskEligibility)
diff --git a/internal/httpapi/portal.go b/internal/httpapi/portal.go
index 6a9f6ed..296c187 100644
--- a/internal/httpapi/portal.go
+++ b/internal/httpapi/portal.go
@@ -211,6 +211,27 @@ func (a *API) popupNotice(w http.ResponseWriter, r *http.Request) {
 	writeSuccess(w, r, result)
 }
 
+func (a *API) pendingNotice(w http.ResponseWriter, r *http.Request) {
+	w.Header().Set("Cache-Control", "private, no-store")
+	if r.Method != http.MethodGet {
+		methodNotAllowed(w, r, http.MethodGet)
+		return
+	}
+	if !a.ensurePortal(w, r) {
+		return
+	}
+	principal, ok := a.authenticateMember(w, r)
+	if !ok {
+		return
+	}
+	result, err := a.portal.PendingNotice(r.Context(), principal.TenantID, principal.MemberID)
+	if err != nil {
+		writePortalError(w, r, err)
+		return
+	}
+	writeSuccess(w, r, result)
+}
+
 func (a *API) noticeResource(w http.ResponseWriter, r *http.Request) {
 	path := strings.Trim(strings.TrimPrefix(r.URL.Path, "/v1/notices/"), "/")
 	parts := strings.Split(path, "/")
diff --git a/internal/portal/service.go b/internal/portal/service.go
index 805e8fb..209c7c0 100644
--- a/internal/portal/service.go
+++ b/internal/portal/service.go
@@ -22,7 +22,7 @@ type Repository interface {
 	PublishedContent(context.Context, int64, string) (*store.Content, error)
 	ActiveMemberLevels(context.Context, int64) ([]store.MemberLevel, error)
 	ActiveMemberNotices(context.Context, int64, int64, int) ([]store.MemberNotice, error)
-	LatestPopupNotice(context.Context, int64, int64) (*store.MemberNotice, error)
+	NextUnreadMemberNotice(context.Context, int64, int64) (*store.MemberNotice, error)
 	MarkMemberNoticeRead(context.Context, int64, int64, int64) error
 	MemberNotices(context.Context, int64, int64, int, int) (*store.MemberNoticePage, error)
 	MemberTaskSummary(context.Context, int64, int64) (*store.TaskSummary, error)
@@ -220,6 +220,16 @@ func (s *Service) PopupNotice(ctx context.Context, tenantID, memberID int64) (*N
 		SourceType: "managed_content", CreatedAt: row.PublishedAt}, nil
 }
 
+func (s *Service) PendingNotice(ctx context.Context, tenantID, memberID int64) (*Notice, error) {
+	row, err := s.repository.NextUnreadMemberNotice(ctx, tenantID, memberID)
+	if err != nil || row == nil {
+		return nil, err
+	}
+	return &Notice{ID: row.ID, Title: row.Title, Content: row.Content,
+		SourceType: noticeSourceName(row.SourceType), StartAt: row.StartAt,
+		EndAt: row.EndAt, CreatedAt: row.CreatedAt}, nil
+}
+
 func (s *Service) MarkNoticeRead(ctx context.Context, tenantID, memberID, noticeID int64) error {
 	return s.repository.MarkMemberNoticeRead(ctx, tenantID, memberID, noticeID)
 }
diff --git a/internal/portal/service_test.go b/internal/portal/service_test.go
index ff49b09..4df575b 100644
--- a/internal/portal/service_test.go
+++ b/internal/portal/service_test.go
@@ -42,7 +42,7 @@ func (r fakeRepository) ActiveMemberLevels(context.Context, int64) ([]store.Memb
 func (r fakeRepository) ActiveMemberNotices(context.Context, int64, int64, int) ([]store.MemberNotice, error) {
 	return r.notices, nil
 }
-func (r fakeRepository) LatestPopupNotice(context.Context, int64, int64) (*store.MemberNotice, error) {
+func (r fakeRepository) NextUnreadMemberNotice(context.Context, int64, int64) (*store.MemberNotice, error) {
 	if len(r.notices) == 0 {
 		return nil, nil
 	}
diff --git a/internal/store/portal.go b/internal/store/portal.go
index 4b3a539..447252f 100644
--- a/internal/store/portal.go
+++ b/internal/store/portal.go
@@ -5,10 +5,21 @@ import (
 	"database/sql"
 	"encoding/json"
 	"errors"
+	"time"
 )
 
 const publishStatusPublished = 3
 
+var noticeBusinessLocation = time.FixedZone("Asia/Shanghai", 8*60*60)
+
+func noticeBusinessNow() string {
+	return formatNoticeBusinessTime(time.Now())
+}
+
+func formatNoticeBusinessTime(value time.Time) string {
+	return value.In(noticeBusinessLocation).Format("2006-01-02 15:04:05.999999999")
+}
+
 type Banner struct {
 	ID          int64  `db:"id"`
 	ImageURL    string `db:"image_url"`
@@ -154,29 +165,33 @@ func (s *Store) ActiveMemberNotices(ctx context.Context, tenantID, memberID int6
 		return nil, errors.New("store is unavailable")
 	}
 	rows := make([]MemberNotice, 0)
+	now := noticeBusinessNow()
 	err := s.db.SelectContext(ctx, &rows, `SELECT id,title,content,source_type,
 		DATE_FORMAT(start_at,'%Y-%m-%dT%H:%i:%sZ') AS start_at,
 		DATE_FORMAT(end_at,'%Y-%m-%dT%H:%i:%sZ') AS end_at,
 		DATE_FORMAT(created_at,'%Y-%m-%dT%H:%i:%sZ') AS created_at
 		FROM hg_app_member_notice WHERE tenant_id=? AND member_id IN (0,?) AND notice_status=1
-		AND start_at<=UTC_TIMESTAMP(3) AND end_at>UTC_TIMESTAMP(3)
-		ORDER BY start_at DESC,id DESC LIMIT ?`, tenantID, memberID, limit)
+		AND start_at<=? AND end_at>?
+		ORDER BY start_at DESC,id DESC LIMIT ?`, tenantID, memberID, now, now, limit)
 	return rows, err
 }
 
-func (s *Store) LatestPopupNotice(ctx context.Context, tenantID, memberID int64) (*MemberNotice, error) {
+func (s *Store) NextUnreadMemberNotice(ctx context.Context, tenantID, memberID int64) (*MemberNotice, error) {
 	if s == nil || s.db == nil {
 		return nil, errors.New("store is unavailable")
 	}
 	var row MemberNotice
-	err := s.db.GetContext(ctx, &row, `SELECT id,title,content,source_type,
-		DATE_FORMAT(start_at,'%Y-%m-%dT%H:%i:%sZ') AS start_at,
-		DATE_FORMAT(end_at,'%Y-%m-%dT%H:%i:%sZ') AS end_at,
-		DATE_FORMAT(created_at,'%Y-%m-%dT%H:%i:%sZ') AS created_at
-		FROM hg_app_member_notice
-		WHERE tenant_id=? AND member_id IN (0,?) AND notice_status=1
-		AND start_at<=UTC_TIMESTAMP(3) AND end_at>UTC_TIMESTAMP(3)
-		ORDER BY start_at DESC,id DESC LIMIT 1`, tenantID, memberID)
+	now := noticeBusinessNow()
+	err := s.db.GetContext(ctx, &row, `SELECT n.id,n.title,n.content,n.source_type,
+		DATE_FORMAT(n.start_at,'%Y-%m-%dT%H:%i:%sZ') AS start_at,
+		DATE_FORMAT(n.end_at,'%Y-%m-%dT%H:%i:%sZ') AS end_at,
+		DATE_FORMAT(n.created_at,'%Y-%m-%dT%H:%i:%sZ') AS created_at
+		FROM hg_app_member_notice n
+		WHERE n.tenant_id=? AND n.member_id=? AND n.notice_status=1
+		AND n.start_at<=? AND n.end_at>?
+		AND NOT EXISTS (SELECT 1 FROM hg_app_member_notice_read r
+			WHERE r.tenant_id=n.tenant_id AND r.notice_id=n.id AND r.member_id=?)
+		ORDER BY n.start_at ASC,n.id ASC LIMIT 1`, tenantID, memberID, now, now, memberID)
 	if errors.Is(err, sql.ErrNoRows) {
 		return nil, nil
 	}
@@ -187,13 +202,14 @@ func (s *Store) MarkMemberNoticeRead(ctx context.Context, tenantID, memberID, no
 	if s == nil || s.db == nil {
 		return errors.New("store is unavailable")
 	}
+	now := noticeBusinessNow()
 	result, err := s.db.ExecContext(ctx, `INSERT INTO hg_app_member_notice_read
 		(tenant_id,notice_id,member_id,read_at,created_at)
-		SELECT n.tenant_id,n.id,?,UTC_TIMESTAMP(3),UTC_TIMESTAMP(3)
+		SELECT n.tenant_id,n.id,?,?,?
 		FROM hg_app_member_notice n
 		WHERE n.tenant_id=? AND n.id=? AND n.member_id IN (0,?) AND n.notice_status=1
-		AND n.start_at<=UTC_TIMESTAMP(3) AND n.end_at>UTC_TIMESTAMP(3)
-		ON DUPLICATE KEY UPDATE read_at=VALUES(read_at)`, memberID, tenantID, noticeID, memberID)
+		AND n.start_at<=? AND n.end_at>?
+		ON DUPLICATE KEY UPDATE read_at=VALUES(read_at)`, memberID, now, now, tenantID, noticeID, memberID, now, now)
 	if err != nil {
 		return err
 	}
@@ -212,8 +228,9 @@ func (s *Store) MemberNotices(ctx context.Context, tenantID, memberID int64, off
 		return nil, errors.New("store is unavailable")
 	}
 	const where = ` WHERE tenant_id=? AND member_id IN (0,?) AND notice_status=1
-		AND start_at<=UTC_TIMESTAMP(3) AND end_at>UTC_TIMESTAMP(3)`
-	args := []any{tenantID, memberID}
+		AND start_at<=? AND end_at>?`
+	now := noticeBusinessNow()
+	args := []any{tenantID, memberID, now, now}
 	var total int64
 	if err := s.db.GetContext(ctx, &total, `SELECT COUNT(*) FROM hg_app_member_notice`+where, args...); err != nil {
 		return nil, err
diff --git a/internal/store/portal_notice_integration_test.go b/internal/store/portal_notice_integration_test.go
new file mode 100644
index 0000000..b559685
--- /dev/null
+++ b/internal/store/portal_notice_integration_test.go
@@ -0,0 +1,85 @@
+package store
+
+import (
+	"context"
+	"errors"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/jmoiron/sqlx"
+)
+
+func TestPendingNoticeAudienceAndReadAcknowledgement(t *testing.T) {
+	dsn := os.Getenv("OLONS_TEST_MYSQL_DSN")
+	if dsn == "" {
+		t.Skip("set OLONS_TEST_MYSQL_DSN to run the notice integration test")
+	}
+	db, err := sqlx.Connect("mysql", dsn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	db.SetMaxOpenConns(1)
+	db.SetMaxIdleConns(1)
+	t.Cleanup(func() { _ = db.Close() })
+	// Connection-local temporary tables shadow the real tables without changing application data.
+	for _, statement := range []string{
+		`CREATE TEMPORARY TABLE hg_app_member_notice (
+			id BIGINT PRIMARY KEY, tenant_id BIGINT, member_id BIGINT,
+			title VARCHAR(120), content TEXT, source_type INT, notice_status INT,
+			start_at DATETIME(3), end_at DATETIME(3), created_at DATETIME(3))`,
+		`CREATE TEMPORARY TABLE hg_app_member_notice_read (
+			id BIGINT PRIMARY KEY AUTO_INCREMENT, tenant_id BIGINT, notice_id BIGINT,
+			member_id BIGINT, read_at DATETIME(3), created_at DATETIME(3),
+			UNIQUE KEY (tenant_id, notice_id, member_id))`,
+	} {
+		if _, err := db.Exec(statement); err != nil {
+			t.Fatal(err)
+		}
+	}
+	now := time.Now()
+	for _, notice := range []struct {
+		id, tenantID, memberID int64
+		status                 int
+		start, end             time.Time
+	}{
+		{1, 0, 9, 1, now.Add(-2 * time.Hour), now.Add(time.Hour)},
+		{2, 0, 9, 1, now.Add(-time.Hour), now.Add(time.Hour)},
+		{3, 0, 10, 1, now.Add(-time.Hour), now.Add(time.Hour)},
+		{4, 1, 9, 1, now.Add(-time.Hour), now.Add(time.Hour)},
+		{5, 0, 0, 1, now.Add(-time.Hour), now.Add(time.Hour)},
+		{6, 0, 9, 2, now.Add(-time.Hour), now.Add(time.Hour)},
+		{7, 0, 9, 1, now.Add(-2 * time.Hour), now.Add(-time.Hour)},
+		{8, 0, 9, 1, now.Add(time.Hour), now.Add(2 * time.Hour)},
+	} {
+		_, err := db.Exec(`INSERT INTO hg_app_member_notice
+			(id,tenant_id,member_id,title,content,source_type,notice_status,start_at,end_at,created_at)
+			VALUES (?,?,?,'系统通知','通知内容',1,?,?,?,?)`, notice.id, notice.tenantID, notice.memberID,
+			notice.status, formatNoticeBusinessTime(notice.start), formatNoticeBusinessTime(notice.end), formatNoticeBusinessTime(now))
+		if err != nil {
+			t.Fatal(err)
+		}
+	}
+	ctx := context.Background()
+	s := &Store{db: db}
+	for _, expectedID := range []int64{1, 2} {
+		notice, err := s.NextUnreadMemberNotice(ctx, 0, 9)
+		if err != nil || notice == nil || notice.ID != expectedID {
+			t.Fatalf("pending notice = %+v, error = %v, want id %d", notice, err, expectedID)
+		}
+		if err := s.MarkMemberNoticeRead(ctx, 0, 9, expectedID); err != nil {
+			t.Fatal(err)
+		}
+	}
+	if notice, err := s.NextUnreadMemberNotice(ctx, 0, 9); err != nil || notice != nil {
+		t.Fatalf("read, expired, revoked, foreign and broadcast notices must not pop up: %+v, %v", notice, err)
+	}
+	for _, forbiddenID := range []int64{3, 4} {
+		if err := s.MarkMemberNoticeRead(ctx, 0, 9, forbiddenID); !errors.Is(err, ErrResourceNotFound) {
+			t.Fatalf("reading foreign notice %d: error = %v", forbiddenID, err)
+		}
+	}
+	if notice, err := s.NextUnreadMemberNotice(ctx, 0, 10); err != nil || notice == nil || notice.ID != 3 {
+		t.Fatalf("other recipient must retain their unread notice: %+v, %v", notice, err)
+	}
+}
diff --git a/internal/store/portal_notice_test.go b/internal/store/portal_notice_test.go
new file mode 100644
index 0000000..01ad32b
--- /dev/null
+++ b/internal/store/portal_notice_test.go
@@ -0,0 +1,13 @@
+package store
+
+import (
+	"testing"
+	"time"
+)
+
+func TestFormatNoticeBusinessTimeUsesShanghaiWallClock(t *testing.T) {
+	value := time.Date(2026, 10, 22, 6, 12, 38, 0, time.UTC)
+	if got, want := formatNoticeBusinessTime(value), "2026-10-22 14:12:38"; got != want {
+		t.Fatalf("formatNoticeBusinessTime() = %q, want %q", got, want)
+	}
+}
diff --git a/internal/store/tasks.go b/internal/store/tasks.go
index 50be719..d7e506f 100644
--- a/internal/store/tasks.go
+++ b/internal/store/tasks.go
@@ -541,7 +541,7 @@ func orderSelectSQL() string {
 		COALESCE(JSON_UNQUOTE(JSON_EXTRACT(o.rule_snapshot,'$.deadline_at')),'') AS deadline_at,
 		COALESCE(DATE_FORMAT(o.matched_at,'%Y-%m-%dT%H:%i:%sZ'),'') AS matched_at,
 		COALESCE(DATE_FORMAT(o.completed_at,'%Y-%m-%dT%H:%i:%sZ'),'') AS completed_at,
-		DATE_FORMAT(o.created_at,'%Y-%m-%dT%H:%i:%sZ') AS created_at,
+		` + databaseWallTimeUTC("o.created_at") + ` AS created_at,
 		DATE_FORMAT(o.updated_at,'%Y-%m-%dT%H:%i:%sZ') AS updated_at,
 		COALESCE(t.title,'') AS task_title,COALESCE(t.description,'') AS task_description,
 		COALESCE(t.detail_html,'') AS task_detail_html,COALESCE(s.submission_no,'') AS submission_no,
diff --git a/internal/store/time.go b/internal/store/time.go
new file mode 100644
index 0000000..6ea49cc
--- /dev/null
+++ b/internal/store/time.go
@@ -0,0 +1,8 @@
+package store
+
+// databaseWallTimeUTC normalizes DATETIME values written by CURRENT_TIMESTAMP.
+// The database session can use UTC or Beijing time independently of the Go process.
+// Do not use it for fields explicitly written as UTC by application code.
+func databaseWallTimeUTC(column string) string {
+	return `DATE_FORMAT(TIMESTAMPADD(SECOND,TIMESTAMPDIFF(SECOND,NOW(),UTC_TIMESTAMP()),` + column + `),'%Y-%m-%dT%H:%i:%sZ')`
+}
diff --git a/internal/store/time_integration_test.go b/internal/store/time_integration_test.go
new file mode 100644
index 0000000..5827650
--- /dev/null
+++ b/internal/store/time_integration_test.go
@@ -0,0 +1,48 @@
+package store
+
+import (
+	"os"
+	"testing"
+
+	"github.com/jmoiron/sqlx"
+)
+
+func TestOrderCreatedTimeRespectsDatabaseSessionZone(t *testing.T) {
+	dsn := os.Getenv("OLONS_TEST_MYSQL_DSN")
+	if dsn == "" {
+		t.Skip("set OLONS_TEST_MYSQL_DSN to run the time integration test")
+	}
+	db, err := sqlx.Connect("mysql", dsn)
+	if err != nil {
+		t.Fatal(err)
+	}
+	db.SetMaxOpenConns(1)
+	db.SetMaxIdleConns(1)
+	t.Cleanup(func() { _ = db.Close() })
+	if _, err := db.Exec(`CREATE TEMPORARY TABLE order_time_fixture (created_at DATETIME(3))`); err != nil {
+		t.Fatal(err)
+	}
+	for _, test := range []struct{ zone, wallTime string }{
+		{"+00:00", "2026-10-22 13:06:00"},
+		{"+08:00", "2026-10-22 21:06:00"},
+	} {
+		t.Run(test.zone, func(t *testing.T) {
+			if _, err := db.Exec(`SET SESSION time_zone=?`, test.zone); err != nil {
+				t.Fatal(err)
+			}
+			if _, err := db.Exec(`DELETE FROM order_time_fixture`); err != nil {
+				t.Fatal(err)
+			}
+			if _, err := db.Exec(`INSERT INTO order_time_fixture (created_at) VALUES (?)`, test.wallTime); err != nil {
+				t.Fatal(err)
+			}
+			var actual string
+			if err := db.Get(&actual, `SELECT `+databaseWallTimeUTC("created_at")+` FROM order_time_fixture`); err != nil {
+				t.Fatal(err)
+			}
+			if actual != "2026-10-22T13:06:00Z" {
+				t.Fatalf("normalized timestamp = %q, want 2026-10-22T13:06:00Z", actual)
+			}
+		})
+	}
+}
diff --git a/internal/tasks/service.go b/internal/tasks/service.go
index bb57301..a0e26f5 100644
--- a/internal/tasks/service.go
+++ b/internal/tasks/service.go
@@ -438,8 +438,13 @@ func allowedActions(row store.TaskOrder) []string {
 	switch row.OrderStatus {
 	case 2:
 		var snapshot map[string]any
-		if json.Unmarshal(row.RuleSnapshot, &snapshot) == nil && snapshot["dispatch_mode"] == "manual" {
-			return []string{"submit", "contact_support"}
+		if json.Unmarshal(row.RuleSnapshot, &snapshot) == nil {
+			if snapshot["balance_shortage_pending"] == true {
+				return []string{"contact_support"}
+			}
+			if snapshot["dispatch_mode"] == "manual" {
+				return []string{"submit", "contact_support"}
+			}
 		}
 		return []string{"contact_support"}
 	case 3, 5, 6, 8:
diff --git a/internal/tasks/service_test.go b/internal/tasks/service_test.go
index d11b772..116612e 100644
--- a/internal/tasks/service_test.go
+++ b/internal/tasks/service_test.go
@@ -170,3 +170,12 @@ func TestOrdersRejectsUnknownStatus(t *testing.T) {
 		t.Fatalf("expected status error, got %v", err)
 	}
 }
+
+func TestAllowedActionsBalancePendingOrderCannotBeSubmitted(t *testing.T) {
+	row := store.TaskOrder{OrderStatus: 2, RuleSnapshot: json.RawMessage(`{"dispatch_mode":"manual","balance_shortage_pending":true}`)}
+	for _, action := range allowedActions(row) {
+		if action == "submit" {
+			t.Fatal("余额不足待处理订单不应允许提交")
+		}
+	}
+}
diff --git a/web/src/mobile/MobileShell.vue b/web/src/mobile/MobileShell.vue
index bd91d9f..e089aee 100644
--- a/web/src/mobile/MobileShell.vue
+++ b/web/src/mobile/MobileShell.vue
@@ -1,6 +1,7 @@
 <template>
   <main class="m-app" :class="{ 'm-app--with-nav': showNav }">
     <router-view />
+    <SystemNoticeHost />
     <nav v-if="showNav" class="m-bottom-nav" aria-label="主要导航">
       <router-link v-for="item in nav" :key="item.path" :to="item.path" :aria-label="item.label">
         <img :src="isActive(item.path) ? item.activeIcon : item.icon" alt="" />
@@ -13,12 +14,15 @@
 <script setup lang="ts">
   import { computed, watch } from 'vue';
   import { useRoute, useRouter } from 'vue-router';
+  import { lockHtmlScrollRightCompensationRef } from 'naive-ui/es/_utils';
   import { hasSession } from './api';
   import { mobileAssets } from './assets';
+  import SystemNoticeHost from './components/SystemNoticeHost.vue';
 
   const route = useRoute();
   const router = useRouter();
   const showNav = computed(() => Boolean(route.meta.mobileNav));
+  const scrollbarCompensation = lockHtmlScrollRightCompensationRef;
   const nav = [
     {
       label: '首页',
@@ -71,3 +75,9 @@
 
   watch(() => route.path, ensureAccess, { immediate: true });
 </script>
+
+<style scoped>
+  .m-bottom-nav {
+    right: v-bind(scrollbarCompensation);
+  }
+</style>
diff --git a/web/src/mobile/api.test.ts b/web/src/mobile/api.test.ts
new file mode 100644
index 0000000..d3d64e8
--- /dev/null
+++ b/web/src/mobile/api.test.ts
@@ -0,0 +1,25 @@
+import { describe, expect, it } from 'vitest';
+import { dateTime } from './api';
+
+describe('Beijing business time display', () => {
+  it.each(['UTC', 'America/New_York', 'Asia/Shanghai'])(
+    'displays the same Beijing time on a device using %s',
+    (deviceTimeZone) => {
+      const previous = process.env.TZ;
+      process.env.TZ = deviceTimeZone;
+      try {
+        expect(dateTime('2026-10-22T13:06:00Z')).toBe('2026-10-22 21:06');
+        expect(dateTime('2026-10-22T21:06:00+08:00')).toBe('2026-10-22 21:06');
+        expect(dateTime('2026-10-22T16:00:00Z')).toBe('2026-10-23 00:00');
+      } finally {
+        if (previous === undefined) delete process.env.TZ;
+        else process.env.TZ = previous;
+      }
+    }
+  );
+
+  it('uses a placeholder for missing or invalid timestamps', () => {
+    expect(dateTime()).toBe('--');
+    expect(dateTime('invalid-time')).toBe('--');
+  });
+});
diff --git a/web/src/mobile/api.ts b/web/src/mobile/api.ts
index 54889aa..edaf466 100644
--- a/web/src/mobile/api.ts
+++ b/web/src/mobile/api.ts
@@ -184,12 +184,13 @@ export function dateTime(value?: string) {
   const date = new Date(value);
   if (Number.isNaN(date.getTime())) return '--';
   return new Intl.DateTimeFormat('zh-CN', {
+    timeZone: 'Asia/Shanghai',
     year: 'numeric',
     month: '2-digit',
     day: '2-digit',
     hour: '2-digit',
     minute: '2-digit',
-    hour12: false,
+    hourCycle: 'h23',
   })
     .format(date)
     .replaceAll('/', '-');
diff --git a/web/src/mobile/assets/system-notice-popup@2x.png b/web/src/mobile/assets/system-notice-popup@2x.png
new file mode 100644
index 0000000..9655db6
Binary files /dev/null and b/web/src/mobile/assets/system-notice-popup@2x.png differ
diff --git a/web/src/mobile/components/AnnouncementPopup.vue b/web/src/mobile/components/AnnouncementPopup.vue
index 9b5cc25..5001e6c 100644
--- a/web/src/mobile/components/AnnouncementPopup.vue
+++ b/web/src/mobile/components/AnnouncementPopup.vue
@@ -1,34 +1,34 @@
 <template>
-  <Teleport to="body">
-    <Transition name="announcement-fade">
-      <div v-if="show" class="m-announcement-mask" role="presentation">
-        <section
-          class="m-announcement-dialog"
-          role="dialog"
-          aria-modal="true"
-          aria-labelledby="announcement-title"
-          aria-describedby="announcement-content"
-        >
-          <h2 id="announcement-title" class="m-announcement-sr-title">
-            {{ notice?.title || '公告通知' }}
-          </h2>
-          <img class="m-announcement-board" :src="announcementBoard" alt="" />
-          <div class="m-announcement-body">
-            <div id="announcement-content" class="m-announcement-content">
-              <div v-if="notice?.body_html" v-html="notice.body_html"></div>
-              <template v-else>{{ notice?.content }}</template>
-            </div>
-            <button type="button" @click="$emit('read')">我已阅读</button>
-          </div>
-        </section>
+  <n-modal :show="show" :mask-closable="false" :close-on-esc="false" :z-index="4000">
+    <section
+      class="m-announcement-dialog"
+      role="dialog"
+      aria-modal="true"
+      aria-labelledby="announcement-title"
+      aria-describedby="announcement-content"
+      tabindex="-1"
+    >
+      <h2 id="announcement-title" class="m-announcement-sr-title">系统通知</h2>
+      <img class="m-announcement-board" :src="announcementBoard" alt="" />
+      <div class="m-announcement-body">
+        <div id="announcement-content" class="m-announcement-content">
+          <h3
+            v-if="notice && notice.id > 0 && notice.title && notice.title !== '系统通知'"
+            class="m-announcement-subtitle"
+          >{{ notice.title }}</h3>
+          <div v-if="notice?.body_html" v-html="notice.body_html"></div>
+          <template v-else>{{ notice?.content }}</template>
+        </div>
+        <button type="button" :disabled="reading" @click="$emit('read')">
+          {{ reading ? '正在确认…' : '我已阅读' }}
+        </button>
       </div>
-    </Transition>
-  </Teleport>
+    </section>
+  </n-modal>
 </template>
 
 <script setup lang="ts">
-  import { onBeforeUnmount, watch } from 'vue';
-  import announcementBoard from '../assets/announcement-popup@2x.png';
+  import announcementBoard from '../assets/system-notice-popup@2x.png';
 
   export interface AnnouncementNotice {
     id: number;
@@ -38,39 +38,22 @@
     source_type?: string;
   }
 
-  const props = defineProps<{
+  defineProps<{
     show: boolean;
     notice?: AnnouncementNotice | null;
+    reading?: boolean;
   }>();
 
   defineEmits<{ read: [] }>();
-
-  watch(
-    () => props.show,
-    (show) => {
-      document.body.classList.toggle('m-announcement-open', show);
-    },
-    { immediate: true }
-  );
-
-  onBeforeUnmount(() => document.body.classList.remove('m-announcement-open'));
 </script>
 
 <style scoped>
-  .m-announcement-mask {
-    position: fixed;
-    inset: 0;
-    z-index: 3000;
-    display: grid;
-    place-items: center;
-    padding: 20px 16px;
-    background: rgba(0, 0, 0, 0.62);
-  }
-
   .m-announcement-dialog {
     position: relative;
     width: min(312px, calc(100vw - 32px), calc((100vh - 32px) * 2 / 3));
     aspect-ratio: 2 / 3;
+    background: transparent;
+    box-shadow: none;
   }
 
   .m-announcement-board {
@@ -107,6 +90,12 @@
     display: none;
   }
 
+  .m-announcement-subtitle {
+    margin: 0 0 8px;
+    font-size: 16px;
+    font-weight: 600;
+  }
+
   .m-announcement-body button {
     flex: none;
     width: 100%;
@@ -132,20 +121,4 @@
     border: 0;
   }
 
-  .announcement-fade-enter-active,
-  .announcement-fade-leave-active {
-    transition: opacity 0.2s ease;
-  }
-
-  .announcement-fade-enter-from,
-  .announcement-fade-leave-to {
-    opacity: 0;
-  }
-
-</style>
-
-<style>
-  body.m-announcement-open {
-    overflow: hidden;
-  }
 </style>
diff --git a/web/src/mobile/components/SystemNoticeHost.vue b/web/src/mobile/components/SystemNoticeHost.vue
new file mode 100644
index 0000000..d3c978f
--- /dev/null
+++ b/web/src/mobile/components/SystemNoticeHost.vue
@@ -0,0 +1,100 @@
+<template>
+  <AnnouncementPopup
+    :show="Boolean(activeSystemNotice)"
+    :notice="activeSystemNotice"
+    :reading="reading"
+    @read="markRead"
+  />
+</template>
+
+<script setup lang="ts">
+  import { onBeforeUnmount, onMounted, ref, watch } from 'vue';
+  import { useRoute } from 'vue-router';
+  import AnnouncementPopup, { type AnnouncementNotice } from './AnnouncementPopup.vue';
+  import {
+    completeLoginNotice,
+    errorText,
+    hasSession,
+    MobileApiError,
+    request,
+    shouldShowLoginNotice,
+  } from '../api';
+  import { activeSystemNotice, closeSystemNotice, openSystemNotice } from '../systemNotices';
+
+  const route = useRoute();
+  const reading = ref(false);
+  let timer: number | undefined;
+  let refreshing = false;
+  let disposed = false;
+  const controller = new AbortController();
+
+  async function refresh() {
+    if (disposed || refreshing || activeSystemNotice.value || !hasSession() ||
+      document.visibilityState === 'hidden') return;
+    refreshing = true;
+    let loadingLoginNotice = false;
+    try {
+      const pending = await request<AnnouncementNotice | null>({
+        url: '/v1/notices/pending', signal: controller.signal,
+      });
+      if (disposed || activeSystemNotice.value) return;
+      if (pending) {
+        openSystemNotice(pending);
+        return;
+      }
+      if (shouldShowLoginNotice()) {
+        loadingLoginNotice = true;
+        const loginNotice = await request<AnnouncementNotice | null>({
+          url: '/v1/notices/popup', signal: controller.signal,
+        });
+        if (disposed || activeSystemNotice.value) return;
+        if (loginNotice) openSystemNotice(loginNotice);
+        else completeLoginNotice();
+      }
+    } catch (error) {
+      if (loadingLoginNotice && error instanceof MobileApiError && error.status === 404) completeLoginNotice();
+      // Leave the page usable and retry on the next poll or when the page becomes visible.
+    } finally {
+      refreshing = false;
+    }
+  }
+
+  async function markRead() {
+    const notice = activeSystemNotice.value;
+    if (!notice || reading.value) return;
+    reading.value = true;
+    try {
+      if (notice.id > 0) {
+        await request({
+          url: `/v1/notices/${notice.id}/read`, method: 'POST', signal: controller.signal,
+        });
+      } else {
+        completeLoginNotice();
+      }
+      closeSystemNotice();
+    } catch (error) {
+      if (error instanceof MobileApiError && error.status === 404) closeSystemNotice();
+      else if (!disposed) window.$message.error(errorText(error));
+    } finally {
+      reading.value = false;
+    }
+    if (!disposed && !activeSystemNotice.value) void refresh();
+  }
+
+  const resume = () => void refresh();
+  watch(() => route.fullPath, resume);
+  onMounted(() => {
+    void refresh();
+    timer = window.setInterval(resume, 15000);
+    document.addEventListener('visibilitychange', resume);
+    window.addEventListener('online', resume);
+  });
+  onBeforeUnmount(() => {
+    disposed = true;
+    controller.abort();
+    if (timer) window.clearInterval(timer);
+    document.removeEventListener('visibilitychange', resume);
+    window.removeEventListener('online', resume);
+    closeSystemNotice();
+  });
+</script>
diff --git a/web/src/mobile/styles.css b/web/src/mobile/styles.css
index 508a9db..11082fa 100644
--- a/web/src/mobile/styles.css
+++ b/web/src/mobile/styles.css
@@ -94,11 +94,12 @@ body {
 }
 .m-bottom-nav {
   position: fixed;
-  left: 50%;
+  left: 0;
+  right: 0;
   bottom: 0;
-  transform: translateX(-50%);
+  margin-inline: auto;
   z-index: 20;
-  width: min(100%, 750px);
+  max-width: 750px;
   height: calc(76px + env(safe-area-inset-bottom));
   padding: 8px 18px env(safe-area-inset-bottom);
   background: rgba(255, 255, 255, 0.98);
@@ -540,10 +541,23 @@ body {
   flex: 1;
   min-width: 0;
   margin: 0;
+  overflow: hidden;
   white-space: nowrap;
+}
+.m-notice-track {
+  display: block;
   overflow: hidden;
   text-overflow: ellipsis;
 }
+.m-notice-track.is-marquee {
+  display: inline-flex;
+  gap: 28px;
+  padding-right: 28px;
+  width: max-content;
+  overflow: visible;
+  text-overflow: clip;
+  animation: m-notice-marquee 18s linear infinite;
+}
 .m-notice-tag {
   flex: none;
   padding: 2px 6px;
@@ -575,6 +589,19 @@ body {
     transform: translateY(0);
   }
 }
+@keyframes m-notice-marquee {
+  from {
+    transform: translateX(0);
+  }
+  to {
+    transform: translateX(-50%);
+  }
+}
+@media (prefers-reduced-motion: reduce) {
+  .m-notice-track.is-marquee {
+    animation: none;
+  }
+}
 .m-section {
   margin-top: 12px;
   padding: 17px 16px;
@@ -1059,6 +1086,31 @@ body {
   color: #ce8d3d;
   font-weight: 500;
 }
+.m-order-balance-warning {
+  display: grid;
+  gap: 5px;
+  margin-top: 12px;
+  padding: 12px 14px;
+  border: 1px solid #f2a5a5;
+  border-radius: 8px;
+  background: #fff0f0;
+  color: #b42318;
+  font-size: 13px;
+  line-height: 1.55;
+}
+.m-order-balance-warning strong {
+  font-size: 15px;
+}
+.m-order-balance-warning--detail {
+  padding: 16px;
+  font-size: 14px;
+}
+.m-order-balance-warning--detail p {
+  margin: 5px 0 0;
+}
+.m-order-balance-warning--detail .m-order-recharge-link {
+  margin: 10px 0 0;
+}
 .m-detail {
   display: grid;
   gap: 12px;
diff --git a/web/src/mobile/systemNotices.ts b/web/src/mobile/systemNotices.ts
new file mode 100644
index 0000000..afae683
--- /dev/null
+++ b/web/src/mobile/systemNotices.ts
@@ -0,0 +1,13 @@
+import { shallowRef } from 'vue';
+import type { AnnouncementNotice } from './components/AnnouncementPopup.vue';
+
+export const activeSystemNotice = shallowRef<AnnouncementNotice | null>(null);
+
+export function openSystemNotice(notice: AnnouncementNotice) {
+  if (activeSystemNotice.value) return;
+  activeSystemNotice.value = notice;
+}
+
+export function closeSystemNotice() {
+  activeSystemNotice.value = null;
+}
diff --git a/web/src/mobile/views/HomeView.vue b/web/src/mobile/views/HomeView.vue
index 0576720..52b0a7c 100644
--- a/web/src/mobile/views/HomeView.vue
+++ b/web/src/mobile/views/HomeView.vue
@@ -1,10 +1,5 @@
 <template>
   <section class="m-home">
-    <AnnouncementPopup
-      :show="popupVisible"
-      :notice="loginPopupNotice"
-      @read="markPopupRead"
-    />
     <div class="m-home-hero" :style="bannerStyle">
       <button
         v-if="currentBanner && currentBanner.target_type !== 'none'"
@@ -64,8 +59,11 @@
           <span :class="['m-notice-tag', { 'is-activity': displayNotice.source_type === 'operational_simulation' }]">
             {{ displayNotice.source_type === 'operational_simulation' ? '活动' : '公告' }}
           </span>
-          <p :key="displayNotice.id" class="m-notice-copy">
-            {{ displayNotice.title || displayNotice.content || '查看最新通知' }}
+          <p ref="noticeCopyRef" :key="displayNotice.id" class="m-notice-copy">
+            <span :class="['m-notice-track', { 'is-marquee': noticeNeedsMarquee }]">
+              <span ref="noticeTextRef">{{ noticeBarText }}</span>
+              <span v-if="noticeNeedsMarquee" aria-hidden="true">{{ noticeBarText }}</span>
+            </span>
           </p>
           <n-icon class="m-notice-arrow" :component="ChevronForwardOutline" />
         </button>
@@ -111,20 +109,17 @@
 </template>
 
 <script setup lang="ts">
-  import { computed, onBeforeUnmount, onMounted, ref, watch } from 'vue';
+  import { computed, nextTick, onBeforeUnmount, onMounted, ref, watch } from 'vue';
   import { useRouter } from 'vue-router';
   import { ChevronForwardOutline, MegaphoneOutline, SearchOutline } from '@vicons/ionicons5';
   import AsyncState from '../components/AsyncState.vue';
-  import AnnouncementPopup, {
-    type AnnouncementNotice,
-  } from '../components/AnnouncementPopup.vue';
+  import type { AnnouncementNotice } from '../components/AnnouncementPopup.vue';
+  import { openSystemNotice } from '../systemNotices';
   import {
-    completeLoginNotice,
     errorText,
     money,
     request,
     safeImage,
-    shouldShowLoginNotice,
   } from '../api';
   import { mobileAssets } from '../assets';
 
@@ -153,6 +148,9 @@
     content?: string;
     source_type?: string;
   }
+  interface NoticePageData {
+    items: NoticeData[];
+  }
   interface LeaderboardEntry {
     rank: number;
     username: string;
@@ -165,20 +163,30 @@
   const loading = ref(true);
   const error = ref('');
   const leaderboard = ref<LeaderboardEntry[]>([]);
-  const loginPopupNotice = ref<AnnouncementNotice | null>(null);
-  const popupVisible = ref(false);
   const homeAnnouncement = ref<AnnouncementNotice | null>(null);
   const activeBannerIndex = ref(0);
   const activeNoticeIndex = ref(0);
   let bannerTimer: number | undefined;
   let noticeTimer: number | undefined;
+  let noticeRefreshTimer: number | undefined;
+  let refreshingNotices = false;
   const formatPoints = (value: number) =>
     new Intl.NumberFormat('zh-CN', { minimumFractionDigits: 2, maximumFractionDigits: 2 }).format(
       (value || 0) / 100
     );
   const currentBanner = computed(() => home.value?.banners?.[activeBannerIndex.value]);
   const currentNotice = computed(() => home.value?.notices?.[activeNoticeIndex.value]);
-  const displayNotice = computed(() => homeAnnouncement.value || currentNotice.value);
+  const displayNotice = computed(() => currentNotice.value || homeAnnouncement.value);
+  const noticeBarText = computed(() => {
+    const title = displayNotice.value?.title?.trim() || '';
+    const content = displayNotice.value?.content?.trim() || '';
+    if (title && content && title !== content) return `${title}：${content}`;
+    return title || content || '查看最新通知';
+  });
+  const noticeCopyRef = ref<HTMLElement>();
+  const noticeTextRef = ref<HTMLElement>();
+  const noticeNeedsMarquee = ref(false);
+  let noticeResizeObserver: ResizeObserver | undefined;
   const bannerStyle = computed(() => {
     const url = safeImage(currentBanner.value?.image_url);
     return {
@@ -266,10 +274,16 @@
     if (count > 1) {
       noticeTimer = window.setInterval(() => {
         activeNoticeIndex.value = (activeNoticeIndex.value + 1) % count;
-      }, 4000);
+      }, 12000);
     }
   }
 
+  function measureNoticeMarquee() {
+    const element = noticeCopyRef.value;
+    const text = noticeTextRef.value;
+    noticeNeedsMarquee.value = Boolean(element && text && text.getBoundingClientRect().width > element.clientWidth + 1);
+  }
+
   async function load() {
     loading.value = true;
     error.value = '';
@@ -283,8 +297,6 @@
       home.value = homeData;
       leaderboard.value = rankData || [];
       homeAnnouncement.value = noticeData;
-      loginPopupNotice.value = shouldShowLoginNotice() ? noticeData : null;
-      popupVisible.value = Boolean(loginPopupNotice.value);
     } catch (err) {
       error.value = errorText(err);
     } finally {
@@ -292,25 +304,55 @@
     }
   }
 
-  function markPopupRead() {
-    if (!loginPopupNotice.value) return;
-    const noticeId = loginPopupNotice.value.id;
-    popupVisible.value = false;
-    loginPopupNotice.value = null;
-    completeLoginNotice();
-    if (noticeId > 0) {
-      request<void>({ url: `/v1/notices/${noticeId}/read`, method: 'POST' }).catch(() => undefined);
-    }
-  }
-
   function openNotice() {
+    if (currentNotice.value) {
+      openSystemNotice({
+        id: currentNotice.value.id,
+        title: currentNotice.value.title || '会员公告',
+        content: currentNotice.value.content || '',
+        source_type: currentNotice.value.source_type,
+      });
+      return;
+    }
     if (homeAnnouncement.value) {
-      loginPopupNotice.value = homeAnnouncement.value;
-      popupVisible.value = true;
+      openSystemNotice(homeAnnouncement.value);
       return;
     }
     void router.push('/app/content/notices');
   }
+  async function refreshNotices() {
+    if (document.visibilityState === 'hidden' || refreshingNotices) return;
+    refreshingNotices = true;
+    try {
+      const page = await request<NoticePageData>({
+        url: '/v1/notices',
+        params: { page: 1, page_size: 5 },
+      });
+      if (home.value) {
+        const nextNotices = page.items || [];
+        const previousIds = home.value.notices.map((notice) => notice.id).join(',');
+        const nextIds = nextNotices.map((notice) => notice.id).join(',');
+        home.value.notices = nextNotices;
+        if (previousIds !== nextIds) {
+          activeNoticeIndex.value = 0;
+          restartNoticeTimer();
+        }
+      }
+    } catch {
+      // Keep the latest successfully loaded announcement visible during transient failures.
+    } finally {
+      refreshingNotices = false;
+    }
+  }
+  function handleVisibilityChange() {
+    if (document.visibilityState === 'visible') void refreshNotices();
+  }
+  watch(noticeBarText, () => void nextTick(measureNoticeMarquee), { flush: 'post' });
+  watch(noticeCopyRef, (element, previous) => {
+    if (previous) noticeResizeObserver?.unobserve(previous);
+    if (element) noticeResizeObserver?.observe(element);
+    void nextTick(measureNoticeMarquee);
+  }, { flush: 'post' });
   watch(() => home.value?.banners?.length, () => {
     activeBannerIndex.value = 0;
     restartBannerTimer();
@@ -319,9 +361,22 @@
     activeNoticeIndex.value = 0;
     restartNoticeTimer();
   });
-  onMounted(load);
+  onMounted(async () => {
+    await load();
+    await nextTick();
+    measureNoticeMarquee();
+    if (noticeCopyRef.value && typeof ResizeObserver !== 'undefined') {
+      noticeResizeObserver = new ResizeObserver(measureNoticeMarquee);
+      noticeResizeObserver.observe(noticeCopyRef.value);
+    }
+    noticeRefreshTimer = window.setInterval(() => void refreshNotices(), 15000);
+    document.addEventListener('visibilitychange', handleVisibilityChange);
+  });
   onBeforeUnmount(() => {
     if (bannerTimer) window.clearInterval(bannerTimer);
     if (noticeTimer) window.clearInterval(noticeTimer);
+    if (noticeRefreshTimer) window.clearInterval(noticeRefreshTimer);
+    noticeResizeObserver?.disconnect();
+    document.removeEventListener('visibilitychange', handleVisibilityChange);
   });
 </script>
diff --git a/web/src/mobile/views/OrdersView.vue b/web/src/mobile/views/OrdersView.vue
index cb50df3..c37b820 100644
--- a/web/src/mobile/views/OrdersView.vue
+++ b/web/src/mobile/views/OrdersView.vue
@@ -53,6 +53,10 @@
                 ><strong>佣金：{{ money(item.commission_amount, item.currency) }}</strong></div
               >
             </div>
+            <div v-if="isBalancePending(item)" class="m-order-balance-warning">
+              <strong>余额不足 · 待处理</strong>
+              <span>{{ item.message }}</span>
+            </div>
           </button>
         </div>
       </AsyncState>
@@ -103,6 +107,14 @@
             ><b>{{ detail.product?.specification || detail.product?.spec || '--' }}</b></div
           >
         </section>
+        <section v-if="isBalancePending(detail)" class="m-order-balance-warning m-order-balance-warning--detail" role="alert">
+          <div>
+            <strong>余额不足，订单暂未完成</strong>
+            <p>{{ detail.message }}</p>
+            <p>充值审核通过后，系统会自动检查余额；余额足够时自动完成订单。</p>
+          </div>
+          <router-link class="m-order-recharge-link" to="/app/recharge">立即储入</router-link>
+        </section>
         <section v-if="canSubmit" class="m-order-submit-panel">
           <div>
             <strong>{{ balanceInsufficient ? '账户余额不足' : '大额订单已匹配' }}</strong>
@@ -198,6 +210,8 @@
   const balanceInsufficient = computed(
     () => canSubmit.value && availableAmount.value < requiredAmount.value
   );
+  const isBalancePending = (order: any) =>
+    order?.status === 'pending' && String(order?.message || '').startsWith('余额不足：');
   async function loadList() {
     listController?.abort();
     const controller = new AbortController();