diff --git a/e2e/remediation-flows.spec.ts b/e2e/remediation-flows.spec.ts
index 2c59941..b9410be 100644
--- a/e2e/remediation-flows.spec.ts
+++ b/e2e/remediation-flows.spec.ts
@@ -41,7 +41,18 @@ test('F06 已验收工单返工：归档旧验收 → 再完成 → 再验收',
   await page.keyboard.press('Escape');
   await navigate(page, '/components/signature');
   await page.getByRole('combobox').first().click();
-  await page.locator('.ant-select-item-option', { hasText: 'WO-SCN-REWORK' }).click();
+  // 候选按创建时间倒序，下拉是虚拟列表（只渲染可视的约 10 项）。排在这张工单前面的近期工单数随当天时刻
+  // 与时区变化（演示数据按本地自然日生成；CI 为 UTC 时它常落在第 10 项之后），用滚轮逐屏翻到它渲染出来再点
+  const option = page.locator('.ant-select-item-option', { hasText: 'WO-SCN-REWORK' });
+  const dropdown = page.locator('.ant-select-dropdown:visible');
+  await expect(async () => {
+    if (!(await option.count())) {
+      await dropdown.hover();
+      await page.mouse.wheel(0, 240);
+    }
+    await expect(option).toBeVisible({ timeout: 500 });
+  }).toPass({ timeout: 15_000 });
+  await option.click();
   // getByText 会先命中 select 的 aria-live 隐藏区，断言可见的选中项
   await expect(page.locator('.ant-select', { hasText: 'WO-SCN-REWORK' }).first()).toBeVisible();
 });
diff --git a/src/components/GroupNav/index.test.tsx b/src/components/GroupNav/index.test.tsx
index 477b643..216cd10 100644
--- a/src/components/GroupNav/index.test.tsx
+++ b/src/components/GroupNav/index.test.tsx
@@ -21,6 +21,7 @@ vi.mock('@umijs/max', () => ({
 vi.mock('antd', async () => {
   const React = await import('react');
   return {
+    ConfigProvider: ({ children }: { children?: React.ReactNode }) => children,
     Menu: (props: { selectedKeys?: string[]; items?: { key: string; label?: string }[] }) => {
       menuProps.last = props;
       return React.createElement(
diff --git a/src/components/GroupNav/index.tsx b/src/components/GroupNav/index.tsx
index 529033d..4152462 100644
--- a/src/components/GroupNav/index.tsx
+++ b/src/components/GroupNav/index.tsx
@@ -1,6 +1,6 @@
 import { canAccessRoute, groupOf, matchedKey, useNamedChain, type NavRoute } from '@/utils/routeNav';
 import { history, useAccess, useIntl, useLocation } from '@umijs/max';
-import { Menu, theme } from 'antd';
+import { ConfigProvider, Menu, theme } from 'antd';
 import { useEffect, useRef } from 'react';
 
 /**
@@ -71,24 +71,29 @@ export default function GroupNav() {
       }}
     >
       <div ref={scroller} className="min-w-0 flex-1" style={{ overflowX: 'auto', scrollbarWidth: 'none' }}>
-        <Menu
-          mode="horizontal"
-          disabledOverflow
-          selectedKeys={selected ? [selected] : []}
-          items={items}
-          onClick={({ key }) => {
-            if (key !== pathname) {
-              history.push(key);
-              window.scrollTo(0, 0);
-            }
-          }}
-          style={{
-            borderBottom: 'none',
-            background: 'transparent',
-            minWidth: 0,
-            lineHeight: '40px',
-          }}
-        />
+        {/* 选中页签文字（及底部指示条）antd 默认取 colorPrimary：暗色派生 #1668dc 压在 #141414 上只有 3.55:1
+            （axe color-contrast）。改用 colorLink：浅色两者同为 #0958d9 不变，暗色为 #5c99dc 6.18:1
+            （见 styles/themeTokens.ts）。取运行时 token 而非写死色值，冷启动与顶栏热切换都跟随当前主题 */}
+        <ConfigProvider theme={{ components: { Menu: { horizontalItemSelectedColor: token.colorLink } } }}>
+          <Menu
+            mode="horizontal"
+            disabledOverflow
+            selectedKeys={selected ? [selected] : []}
+            items={items}
+            onClick={({ key }) => {
+              if (key !== pathname) {
+                history.push(key);
+                window.scrollTo(0, 0);
+              }
+            }}
+            style={{
+              borderBottom: 'none',
+              background: 'transparent',
+              minWidth: 0,
+              lineHeight: '40px',
+            }}
+          />
+        </ConfigProvider>
       </div>
       <span
         className="hidden self-center text-xs font-medium tracking-wider whitespace-nowrap uppercase md:inline"
diff --git a/tailwind.css b/tailwind.css
index 79ee27d..3676c40 100644
--- a/tailwind.css
+++ b/tailwind.css
@@ -152,3 +152,13 @@ div.ant-spin-description {
 main.ant-pro-layout-content:has([data-tour='groupnav']) {
   padding: 0 !important;
 }
+
+/*
+ * ProLayout 在 fixedHeader（及 mix 布局）下会在真正的顶栏前插一个空的透明 <header> 占位撑开 56px，
+ * 它和顶栏都是页面级 <header>，读屏器的地标列表里多出一个空「横幅」（axe landmark-no-duplicate-banner /
+ * landmark-unique）。组件没有给占位传属性的口子：visibility: hidden 把它移出无障碍树，而盒子高度照旧
+ * 占位（visibility 不影响布局）；它本来就是透明空元素，视觉无变化。
+ */
+header.ant-layout-header:has(+ header[data-testid='pro-layout-header']) {
+  visibility: hidden;
+}