refactor(admin): tokenize 语义色并补暗黑模式变量覆盖

将 admin 8 文件 ~50 处 raw red/green/yellow/amber/blue 类替换为语义 token
（error/success/warning/info），使其错误/成功/警告框在暗黑模式正确反色。

- tailwind.config.js: error 补 text 子键（原缺，text-error 暗黑底仅 3.3:1 不达 AA）
- globals.css: 新增 --color-error-text；html[data-theme='dark'] 补四语义色的
  *-bg（深色底）与 *-text（浅色，暗底达 AA）覆盖，原暗黑块完全漏掉这些变量
- 映射纪律：语义框 bg-<c>-bg border border-border-secondary text-<c>-text；
  危险按钮 bg-error/bg-success hover:bg-*-hover text-white；字段校验 border-error

验证：type-check 0 errors；lint 0 errors；单测 1624 passed；视觉回归 22 passed；
Playwright 实测 8 变量 light/dark 翻转 + 真实登录错误框背景反色确认。

Co-Authored-By: 阿睿 <workbuddy@tencent.com>

src/app/admin/content/[modelCode]/[itemId]/page.tsx

@@ -106,12 +106,12 @@ function JsonEditor({
         placeholder={placeholder || '输入 JSON 数据'}
         rows={10}
         className={`w-full px-3 py-2 border rounded-lg text-sm font-mono focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent resize-y ${
-          error || parseError ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+          error || parseError ? 'border-error bg-error-bg' : 'border-border-secondary'
         }`}
         spellCheck={false}
       />
-      {parseError && <p className="mt-1 text-xs text-red-500">{parseError}</p>}
+      {parseError && <p className="mt-1 text-xs text-error-text">{parseError}</p>}
-      {error && !parseError && <p className="mt-1 text-xs text-red-500">{error}</p>}
+      {error && !parseError && <p className="mt-1 text-xs text-error-text">{error}</p>}
     </div>
   );
 }
@@ -119,7 +119,7 @@ function JsonEditor({
 function FieldError({ error }: { error?: string }) {
   if (!error) return null;
   return (
-    <p className="mt-1 text-xs text-red-500 flex items-center gap-1">
+    <p className="mt-1 text-xs text-error-text flex items-center gap-1">
       <AlertTriangle className="w-3 h-3" />
       {error}
     </p>
@@ -422,7 +422,7 @@ export default function ContentEditorPage() {
           <div key={key}>
             <label htmlFor={key} className="block text-sm font-medium text-text-secondary mb-1">
               {field.label}
-              {field.required && <span className="text-red-500 ml-1">*</span>}
+              {field.required && <span className="text-error-text ml-1">*</span>}
             </label>
             {field.description && (
               <p className="text-xs text-text-muted mb-1.5">{field.description}</p>
@@ -435,7 +435,7 @@ export default function ContentEditorPage() {
               onBlur={() => handleFieldBlur(field.name)}
               placeholder={field.placeholder}
               className={`w-full px-3 py-2 border rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent ${
-                error ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+                error ? 'border-error bg-error-bg' : 'border-border-secondary'
               }`}
             />
             <FieldError error={error} />
@@ -447,7 +447,7 @@ export default function ContentEditorPage() {
           <div key={key}>
             <label htmlFor={key} className="block text-sm font-medium text-text-secondary mb-1">
               {field.label}
-              {field.required && <span className="text-red-500 ml-1">*</span>}
+              {field.required && <span className="text-error-text ml-1">*</span>}
             </label>
             {field.description && (
               <p className="text-xs text-text-muted mb-1.5">{field.description}</p>
@@ -460,7 +460,7 @@ export default function ContentEditorPage() {
               placeholder={field.placeholder}
               rows={4}
               className={`w-full px-3 py-2 border rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent resize-y ${
-                error ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+                error ? 'border-error bg-error-bg' : 'border-border-secondary'
               }`}
             />
             <FieldError error={error} />
@@ -472,7 +472,7 @@ export default function ContentEditorPage() {
           <div key={key}>
             <label htmlFor={key} className="block text-sm font-medium text-text-secondary mb-1">
               {field.label}
-              {field.required && <span className="text-red-500 ml-1">*</span>}
+              {field.required && <span className="text-error-text ml-1">*</span>}
             </label>
             <input
               id={key}
@@ -480,7 +480,7 @@ export default function ContentEditorPage() {
               value={(value as number) ?? ''}
               onChange={(e) => handleFieldChange(field.name, parseFloat(e.target.value) || 0)}
               className={`w-full px-3 py-2 border rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent ${
-                error ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+                error ? 'border-error bg-error-bg' : 'border-border-secondary'
               }`}
             />
             <FieldError error={error} />
@@ -532,7 +532,7 @@ export default function ContentEditorPage() {
           <div key={key}>
             <label htmlFor={key} className="block text-sm font-medium text-text-secondary mb-1">
               {field.label}
-              {field.required && <span className="text-red-500 ml-1">*</span>}
+              {field.required && <span className="text-error-text ml-1">*</span>}
             </label>
             {field.description && (
               <p className="text-xs text-text-muted mb-1.5">{field.description}</p>
@@ -636,13 +636,13 @@ export default function ContentEditorPage() {
           {!isNew && (
             <div className="flex items-center gap-1.5 text-xs">
               {autoSaveStatus === 'saving' && (
-                <span className="text-amber-600 flex items-center gap-1">
+                <span className="text-warning-text flex items-center gap-1">
                   <Loader2 className="w-3 h-3 animate-spin" />
                   保存中...
                 </span>
               )}
               {autoSaveStatus === 'saved' && (
-                <span className="text-green-600 flex items-center gap-1">
+                <span className="text-success-text flex items-center gap-1">
                   <CheckCircle className="w-3 h-3" />
                   已保存
                   {lastSaved && (
@@ -653,7 +653,7 @@ export default function ContentEditorPage() {
                 </span>
               )}
               {autoSaveStatus === 'unsaved' && (
-                <span className="text-amber-600 flex items-center gap-1">
+                <span className="text-warning-text flex items-center gap-1">
                   <CloudOff className="w-3 h-3" />
                   未保存
                 </span>
@@ -683,7 +683,7 @@ export default function ContentEditorPage() {
             <button
               onClick={handlePublishClick}
               disabled={saving || publishPending}
-              className="flex items-center gap-2 px-4 py-2 bg-green-700 text-white rounded-lg text-sm font-medium hover:bg-green-600 disabled:opacity-50 transition-colors"
+              className="flex items-center gap-2 px-4 py-2 bg-success hover:bg-success-hover text-white rounded-lg text-sm font-medium disabled:opacity-50 transition-colors"
             >
               {publishPending ? (
                 <Loader2 className="w-4 h-4 animate-spin" />
@@ -707,19 +707,19 @@ export default function ContentEditorPage() {
       </div>
 
       {error && (
-        <div className="bg-red-50 border border-red-200 text-red-700 rounded-lg px-4 py-3 text-sm">
+        <div className="bg-error-bg border border-border-secondary text-error-text rounded-lg px-4 py-3 text-sm">
           {error}
         </div>
       )}
 
       {/* 验证错误汇总 */}
       {Object.keys(validationErrors).length > 0 && (
-        <div className="bg-amber-50 border border-amber-200 rounded-lg px-4 py-3">
+        <div className="bg-warning-bg border border-border-secondary rounded-lg px-4 py-3">
-          <div className="flex items-center gap-2 text-amber-700 text-sm font-medium mb-1">
+          <div className="flex items-center gap-2 text-warning-text text-sm font-medium mb-1">
             <AlertTriangle className="w-4 h-4" />
             请修正以下错误
           </div>
-          <ul className="list-disc list-inside text-xs text-amber-600 space-y-0.5">
+          <ul className="list-disc list-inside text-xs text-warning-text space-y-0.5">
             {Object.entries(validationErrors).map(([field, msg]) => (
               <li key={field}>{msg}</li>
             ))}
@@ -732,7 +732,7 @@ export default function ContentEditorPage() {
         {/* 标题 */}
         <div>
           <label htmlFor="title" className="block text-sm font-medium text-text-secondary mb-1">
-            标题 <span className="text-red-500">*</span>
+            标题 <span className="text-error-text">*</span>
           </label>
           <input
             id="title"
@@ -753,7 +753,7 @@ export default function ContentEditorPage() {
             }}
             placeholder="请输入标题"
             className={`w-full px-3 py-2 border rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent ${
-              validationErrors.title ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+              validationErrors.title ? 'border-error bg-error-bg' : 'border-border-secondary'
             }`}
           />
           <FieldError error={validationErrors.title} />
@@ -784,7 +784,7 @@ export default function ContentEditorPage() {
             }}
             placeholder="URL 友好标识（留空自动生成）"
             className={`w-full px-3 py-2 border rounded-lg text-sm focus:outline-none focus:ring-2 focus:ring-border-dark focus:border-transparent ${
-              validationErrors.slug ? 'border-red-300 bg-red-50' : 'border-border-secondary'
+              validationErrors.slug ? 'border-error bg-error-bg' : 'border-border-secondary'
             }`}
           />
           <FieldError error={validationErrors.slug} />
@@ -850,7 +850,7 @@ export default function ContentEditorPage() {
             </AlertDialogDescription>
           </AlertDialogHeader>
           {Object.keys(validationErrors).length > 0 && (
-            <div className="bg-amber-50 border border-amber-200 rounded-lg px-3 py-2 text-xs text-amber-700">
+            <div className="bg-warning-bg border border-border-secondary rounded-lg px-3 py-2 text-xs text-warning-text">
               注意：表单中存在 {Object.keys(validationErrors).length} 个错误，发布可能会失败。
             </div>
           )}
@@ -858,7 +858,7 @@ export default function ContentEditorPage() {
             <AlertDialogCancel>取消</AlertDialogCancel>
             <AlertDialogAction
               onClick={handlePublishConfirm}
-              className="bg-green-700 hover:bg-green-600 text-white"
+              className="bg-success hover:bg-success-hover text-white"
             >
               确认发布
             </AlertDialogAction>

src/app/admin/content/[modelCode]/page.tsx

@@ -147,7 +147,7 @@ export default function ContentListPage() {
 
       {/* Error */}
       {error && (
-        <div className="bg-red-50 border border-red-200 text-red-700 rounded-lg px-4 py-3 text-sm">
+        <div className="bg-error-bg border border-border-secondary text-error-text rounded-lg px-4 py-3 text-sm">
           {error}
         </div>
       )}
@@ -195,9 +195,9 @@ export default function ContentListPage() {
                       <span
                         className={`inline-flex text-xs px-2 py-0.5 rounded-full font-medium ${
                           item.status === 'published'
-                            ? 'bg-green-50 text-green-700'
+                            ? 'bg-success-bg text-success-text'
                             : item.status === 'draft'
-                            ? 'bg-yellow-50 text-yellow-700'
+                            ? 'bg-warning-bg text-warning-text'
                             : 'bg-bg-hover text-text-tertiary'
                         }`}
                       >
@@ -218,7 +218,7 @@ export default function ContentListPage() {
                         </button>
                         <button
                           onClick={() => openDeleteDialog(item.id)}
-                          className="p-1.5 rounded hover:bg-red-50 text-text-muted hover:text-red-500 transition-colors"
+                          className="p-1.5 rounded hover:bg-error-bg text-text-muted hover:text-error-text transition-colors"
                           title="删除"
                         >
                           <Trash2 className="w-4 h-4" />
@@ -271,7 +271,7 @@ export default function ContentListPage() {
             <AlertDialogCancel onClick={() => setPendingDeleteId(null)}>取消</AlertDialogCancel>
             <AlertDialogAction
               onClick={handleConfirmDelete}
-              className="bg-red-600 hover:bg-red-700 text-white"
+              className="bg-error hover:bg-error-hover text-white"
             >
               删除
             </AlertDialogAction>

src/app/admin/login/page.tsx

@@ -42,7 +42,7 @@ export default function AdminLoginPage() {
           className="bg-bg-primary rounded-xl shadow-sm border border-border-primary p-6 space-y-5"
         >
           {error && (
-            <div className="bg-error-bg border border-border-secondary text-error rounded-lg px-4 py-3 text-sm">
+            <div className="bg-error-bg border border-border-secondary text-error-text rounded-lg px-4 py-3 text-sm">
               {error}
             </div>
           )}

src/app/admin/media/page.tsx

@@ -172,7 +172,7 @@ export default function MediaPage() {
                 title="复制链接"
               >
                 {copiedId === item.id ? (
-                  <Check className="w-3 h-3 text-green-500" />
+                  <Check className="w-3 h-3 text-success-text" />
                 ) : (
                   <Copy className="w-3 h-3" />
                 )}
@@ -180,7 +180,7 @@ export default function MediaPage() {
               </button>
               <button
                 onClick={() => openDeleteDialog(item.id)}
-                className="flex-1 flex items-center justify-center gap-1 py-1.5 text-xs text-text-muted hover:bg-red-50 hover:text-red-500 transition-colors"
+                className="flex-1 flex items-center justify-center gap-1 py-1.5 text-xs text-text-muted hover:bg-error-bg hover:text-error-text transition-colors"
                 title="删除"
               >
                 <Trash2 className="w-3 h-3" />
@@ -224,7 +224,7 @@ export default function MediaPage() {
             <AlertDialogCancel onClick={() => setPendingDeleteId(null)}>取消</AlertDialogCancel>
             <AlertDialogAction
               onClick={handleConfirmDelete}
-              className="bg-red-600 hover:bg-red-700 text-white"
+              className="bg-error hover:bg-error-hover text-white"
             >
               删除
             </AlertDialogAction>

src/app/admin/notifications/page.tsx

@@ -38,16 +38,16 @@ const NOTIFICATION_TYPE_LABELS: Record<string, string> = {
 };
 
 const NOTIFICATION_TYPE_ICONS: Record<string, React.ReactNode> = {
-  review_pending: <AlertCircle className="w-4 h-4 text-amber-500" />,
+  review_pending: <AlertCircle className="w-4 h-4 text-warning-text" />,
-  review_approved: <CheckCircle className="w-4 h-4 text-green-500" />,
+  review_approved: <CheckCircle className="w-4 h-4 text-success-text" />,
-  review_rejected: <XCircle className="w-4 h-4 text-red-500" />,
+  review_rejected: <XCircle className="w-4 h-4 text-error-text" />,
   item_archived: <Archive className="w-4 h-4 text-text-muted" />,
 };
 
 const NOTIFICATION_TYPE_COLORS: Record<string, string> = {
-  review_pending: 'bg-amber-50 border-amber-200',
+  review_pending: 'bg-warning-bg border-border-secondary',
-  review_approved: 'bg-green-50 border-green-200',
+  review_approved: 'bg-success-bg border-border-secondary',
-  review_rejected: 'bg-red-50 border-red-200',
+  review_rejected: 'bg-error-bg border-border-secondary',
   item_archived: 'bg-bg-secondary border-border-primary',
 };
 
@@ -156,7 +156,7 @@ export default function NotificationsPage() {
           <p className="text-sm text-text-muted mt-1">
             共 {total} 条通知
             {unreadCount > 0 && (
-              <span className="ml-2 inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-red-100 text-red-700">
+              <span className="ml-2 inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium bg-error-bg text-error-text">
                 {unreadCount} 条未读
               </span>
             )}
@@ -194,7 +194,7 @@ export default function NotificationsPage() {
       </div>
 
       {error && (
-        <div className="p-4 bg-red-50 border border-red-200 rounded-lg text-sm text-red-600">
+        <div className="p-4 bg-error-bg border border-border-secondary rounded-lg text-sm text-error-text">
           {error}
         </div>
       )}
@@ -223,12 +223,12 @@ export default function NotificationsPage() {
               className={`relative flex items-start gap-4 p-4 rounded-lg border transition-colors ${
                 item.read
                   ? 'bg-bg-primary border-border-light'
-                  : NOTIFICATION_TYPE_COLORS[item.type] || 'bg-blue-50 border-blue-200'
+                  : NOTIFICATION_TYPE_COLORS[item.type] || 'bg-info-bg border-border-secondary'
               }`}
             >
               {/* Unread indicator */}
               {!item.read && (
-                <div className="absolute top-4 left-4 w-2 h-2 rounded-full bg-blue-500" />
+                <div className="absolute top-4 left-4 w-2 h-2 rounded-full bg-info" />
               )}
 
               {/* Type icon */}
@@ -278,7 +278,7 @@ export default function NotificationsPage() {
                   {item.relatedItemId && item.relatedModelCode && (
                     <button
                       onClick={() => handleViewRelated(item)}
-                      className="text-xs text-blue-600 hover:text-blue-800 flex items-center gap-1"
+                      className="text-xs text-info-text hover:text-info flex items-center gap-1"
                     >
                       <ExternalLink className="w-3 h-3" />
                       查看详情

src/app/admin/page.tsx

@@ -50,7 +50,7 @@ interface DashboardStats {
 const modelCards = [
   { code: 'news', name: '新闻资讯', icon: Newspaper, color: 'bg-blue-50 text-blue-600' },
   { code: 'case-study', name: '案例研究', icon: Briefcase, color: 'bg-amber-50 text-amber-600' },
-  { code: 'service', name: '服务管理', icon: Settings, color: 'bg-green-50 text-green-600' },
+  { code: 'service', name: '服务管理', icon: Settings, color: 'bg-success-bg text-success-text' },
   { code: 'product', name: '产品管理', icon: Box, color: 'bg-purple-50 text-purple-600' },
   { code: 'solution', name: '解决方案', icon: Layers, color: 'bg-teal-50 text-teal-600' },
   { code: 'hero-banner', name: 'Hero Banner', icon: Image, color: 'bg-rose-50 text-rose-600' },
@@ -81,15 +81,15 @@ const STATUS_LABELS: Record<string, string> = {
 
 const STATUS_COLORS: Record<string, string> = {
   draft: 'bg-bg-hover text-text-secondary',
-  review: 'bg-amber-100 text-amber-700',
+  review: 'bg-warning-bg text-warning-text',
-  published: 'bg-green-100 text-green-700',
+  published: 'bg-success-bg text-success-text',
-  archived: 'bg-red-100 text-red-700',
+  archived: 'bg-error-bg text-error-text',
 };
 
 const NOTIFICATION_TYPE_ICONS: Record<string, React.ReactNode> = {
-  review_pending: <AlertCircle className="w-4 h-4 text-amber-500" />,
+  review_pending: <AlertCircle className="w-4 h-4 text-warning-text" />,
-  review_approved: <CheckCircle className="w-4 h-4 text-green-500" />,
+  review_approved: <CheckCircle className="w-4 h-4 text-success-text" />,
-  review_rejected: <XCircle className="w-4 h-4 text-red-500" />,
+  review_rejected: <XCircle className="w-4 h-4 text-error-text" />,
   item_archived: <Archive className="w-4 h-4 text-text-muted" />,
 };
 
@@ -133,12 +133,12 @@ export default function AdminDashboardPage() {
           { label: '内容模型', value: stats?.models ?? '-', icon: FileText, color: 'bg-blue-50' },
           { label: '内容条目', value: stats?.items ?? '-', icon: Layers, color: 'bg-purple-50' },
           { label: '页面区域', value: stats?.zones ?? '-', icon: Briefcase, color: 'bg-amber-50' },
-          { label: '活跃用户', value: stats?.activeUsers ?? '-', icon: Users, color: 'bg-green-50' },
+          { label: '活跃用户', value: stats?.activeUsers ?? '-', icon: Users, color: 'bg-success-bg' },
           {
             label: '待审核',
             value: stats?.pendingReviews ?? '-',
             icon: AlertCircle,
-            color: 'bg-red-50',
+            color: 'bg-error-bg',
             highlight: (stats?.pendingReviews ?? 0) > 0,
           },
           {
@@ -152,21 +152,21 @@ export default function AdminDashboardPage() {
           <div
             key={stat.label}
             className={`bg-bg-primary rounded-lg border p-4 ${
-              stat.highlight ? 'border-red-200 ring-1 ring-red-100' : 'border-border-primary'
+              stat.highlight ? 'border-error ring-1 ring-error-bg' : 'border-border-primary'
             }`}
           >
             <div className="flex items-center justify-between">
               <div>
                 <p className="text-xs text-text-muted">{stat.label}</p>
                 <p className={`text-2xl font-bold mt-1 ${
-                  stat.highlight ? 'text-red-600' : 'text-text-primary'
+                  stat.highlight ? 'text-error-text' : 'text-text-primary'
                 }`}>
                   {fetching ? '-' : stat.value}
                 </p>
               </div>
               <div className={`w-10 h-10 rounded-lg ${stat.color} flex items-center justify-center`}>
                 <stat.icon className={`w-5 h-5 ${
-                  stat.highlight ? 'text-red-500' : 'text-text-tertiary'
+                  stat.highlight ? 'text-error-text' : 'text-text-tertiary'
                 }`} />
               </div>
             </div>
@@ -202,7 +202,7 @@ export default function AdminDashboardPage() {
             <h2 className="text-sm font-semibold text-text-primary">最近通知</h2>
             <button
               onClick={() => router.push('/admin/notifications')}
-              className="text-xs text-blue-600 hover:text-blue-800"
+              className="text-xs text-info-text hover:text-info"
             >
               查看全部
             </button>
@@ -230,7 +230,7 @@ export default function AdminDashboardPage() {
                       {new Date(n.createdAt).toLocaleDateString('zh-CN')}
                     </p>
                   </div>
-                  {!n.read && <div className="w-2 h-2 rounded-full bg-blue-500 flex-shrink-0 mt-1.5" />}
+                  {!n.read && <div className="w-2 h-2 rounded-full bg-info flex-shrink-0 mt-1.5" />}
                 </div>
               ))}
             </div>

src/app/admin/roles/page.tsx

@@ -154,7 +154,7 @@ export default function RolesPage() {
 
       {/* Alerts */}
       {error && (
-        <div className="bg-red-50 border border-red-200 text-red-700 rounded-lg px-4 py-3 text-sm">
+        <div className="bg-error-bg border border-border-secondary text-error-text rounded-lg px-4 py-3 text-sm">
           {error}
         </div>
       )}

src/app/admin/users/page.tsx

@@ -45,10 +45,10 @@ const ROLE_LABELS: Record<string, string> = {
 };
 
 const ROLE_COLORS: Record<string, string> = {
-  super_admin: 'bg-red-100 text-red-700',
+  super_admin: 'bg-error-bg text-error-text',
-  content_admin: 'bg-blue-100 text-blue-700',
+  content_admin: 'bg-info-bg text-info-text',
-  content_editor: 'bg-green-100 text-green-700',
+  content_editor: 'bg-success-bg text-success-text',
-  reviewer: 'bg-amber-100 text-amber-700',
+  reviewer: 'bg-warning-bg text-warning-text',
   readonly: 'bg-bg-hover text-text-secondary',
 };
 
@@ -266,7 +266,7 @@ export default function UsersPage() {
       </div>
 
       {error && (
-        <div className="p-4 bg-red-50 border border-red-200 rounded-lg text-sm text-red-600">
+        <div className="p-4 bg-error-bg border border-border-secondary rounded-lg text-sm text-error-text">
           {error}
         </div>
       )}
@@ -344,8 +344,8 @@ export default function UsersPage() {
                       <span
                         className={`inline-flex items-center px-2 py-0.5 rounded-full text-xs font-medium ${
                           u.status === 1
-                            ? 'bg-green-100 text-green-700'
+                            ? 'bg-success-bg text-success-text'
-                            : 'bg-red-100 text-red-700'
+                            : 'bg-error-bg text-error-text'
                         }`}
                       >
                         {u.status === 1 ? '启用' : '禁用'}
@@ -368,7 +368,7 @@ export default function UsersPage() {
                         </button>
                         <button
                           onClick={() => { setPendingDeleteId(u.id); setDeleteDialogOpen(true); }}
-                          className="p-1.5 rounded hover:bg-red-50 text-text-muted hover:text-red-600"
+                          className="p-1.5 rounded hover:bg-error-bg text-text-muted hover:text-error-text"
                           title="删除"
                         >
                           <Trash2 className="w-4 h-4" />
@@ -529,7 +529,7 @@ export default function UsersPage() {
           </AlertDialogHeader>
           <AlertDialogFooter>
             <AlertDialogCancel>取消</AlertDialogCancel>
-            <AlertDialogAction onClick={handleDelete} className="bg-red-600 hover:bg-red-700">
+            <AlertDialogAction onClick={handleDelete} className="bg-error hover:bg-error-hover">
               确认删除
             </AlertDialogAction>
           </AlertDialogFooter>

src/app/globals.css

@@ -114,6 +114,9 @@ body {
   --color-error-hover: #A01830;
   --color-error-bg: #FEF2F4;
   --color-error-rgb: 196 30 58;
+  /* 文字专用：--color-error（品牌红）在暗黑底仅 3.3:1，不达 AA；本值浅红，
+     暗黑模式经 html[data-theme='dark'] 覆盖（#F87171）后于暗底达 AA。 */
+  --color-error-text: #C41E3A;
 
   --color-info: #3B82F6;
   --color-info-rgb: 59 130 246;
@@ -419,6 +422,17 @@ html[data-theme='dark'] {
   /* 链接反色 */
   --color-link: #F8FAFC;
   --color-link-hover: #E04A68;
+
+  /* 功能色反色：浅色调背景 → 深色同色调底；文字/图标 → 同色调浅色，于暗底达 AA。
+     按钮底色（DEFAULT）与边框（border-*）保持品牌饱和色，暗黑底仍可读/可见，故不覆盖。 */
+  --color-success-bg: #0E2A1A;
+  --color-success-text: #4ADE80;
+  --color-warning-bg: #2A2008;
+  --color-warning-text: #FBBF24;
+  --color-error-bg: #2A1418;
+  --color-error-text: #F87171;
+  --color-info-bg: #0E1A2A;
+  --color-info-text: #60A5FA;
 }
 
 /* html/body 背景跟随主题 token（覆盖顶部 !important 硬编码） */

tailwind.config.js

@@ -93,6 +93,9 @@ module.exports = {
           hover: 'var(--color-error-hover)',
           bg: 'var(--color-error-bg)',
           rgb: 'var(--color-error-rgb)',
+          /** 文字请用此变体：DEFAULT（品牌红 #C41E3A）在暗黑底仅 3.3:1，不达 AA；
+           *  本值浅红，暗黑模式经 html[data-theme='dark'] 覆盖后达 AA。 */
+          text: 'var(--color-error-text)',
         },
         info: {
           DEFAULT: 'rgb(var(--color-info-rgb) / <alpha-value>)',