feat(products): enable externalUrl redirect and external-site badge

- product 模型补 externalUrl 字段（CMS 可编辑），企业套装详情页支持外链跳转（复用 standalone 模板）
- 矩阵卡 externalUrl 产品加「外部站点」徽标（对齐 Google / 字节 / 腾讯对标）
- 清理 3 个无引用 AoyagiReisho 字体文件（性能优化）
- 测试 17/17 + 视觉基线三端更新，type-check / lint 0 errors

src/app/(marketing)/products/[id]/page.tsx

@@ -1,5 +1,5 @@
 import { Metadata } from 'next';
-import { notFound } from 'next/navigation';
+import { notFound, redirect } from 'next/navigation';
 import { COMPANY_INFO } from '@/lib/constants';
 import { getPublishedItemBySlug, getAllPublishedSlugs } from '@/lib/cms/data-server';
 import type { Product } from '@/lib/constants/products';
@@ -36,6 +36,12 @@ export default async function ProductDetailPage({ params }: { params: Promise<{
     notFound();
   }
 
+  // 若配置 externalUrl，则跳转到独立子域名产品站（对齐品牌矩阵「成熟产品外链」机制）
+  const externalUrl = item.data.externalUrl as string | undefined;
+  if (externalUrl) {
+    redirect(externalUrl);
+  }
+
   const product = { ...item.data, title: item.data.title || item.title } as unknown as Product;
   return <ProductDetailContentV3 product={JSON.parse(JSON.stringify(product))} />;
 }

src/app/(marketing)/products/products-content-v3.test.tsx

@@ -77,6 +77,7 @@ jest.mock('lucide-react', () => {
   };
   return {
     ArrowRight: mockIcon('arrow-right'),
+    ArrowUpRight: mockIcon('arrow-up-right'),
     Package: mockIcon('package'),
     Cpu: mockIcon('cpu'),
     TrendingUp: mockIcon('trendingup'),
@@ -188,6 +189,7 @@ const mockSpecializedProducts: Product[] = [
     image: '/novavis.png',
     heroThemeId: 'novavis',
     bundle: 'standalone',
+    externalUrl: 'https://novavis.p.novalon.cn',
     scenario: '面向执法机关的离线智能数据分析与资金关系图谱平台',
     metrics: [
       { value: '100万+', label: '秒级处理' },
@@ -253,6 +255,13 @@ describe('ProductsContentV3 - 产品列表页集成测试', () => {
     expect(screen.getAllByText('NovaVis 数据可视化平台').length).toBeGreaterThanOrEqual(1);
   });
 
+  it('should show external-site badge for products with externalUrl', async () => {
+    const { default: ProductsContentV3 } = await import('./products-content-v3');
+    render(<ProductsContentV3 products={allMockProducts} />);
+
+    expect(screen.getAllByText('外部站点').length).toBeGreaterThanOrEqual(1);
+  });
+
   it('should render product capabilities on cards', async () => {
     const { default: ProductsContentV3 } = await import('./products-content-v3');
     render(<ProductsContentV3 products={allMockProducts} />);

src/app/(marketing)/products/products-content-v3.tsx

@@ -7,7 +7,7 @@ import { EASE_OUT } from '@/components/ui/page-decoration';
 import { Button } from '@/components/ui/button';
 import { StaticLink } from '@/components/ui/static-link';
 import { BentoItem } from '@/components/sections/bento-grid';
-import { ArrowRight, Package, Cpu, TrendingUp, Users, Settings, FileText } from 'lucide-react';
+import { ArrowRight, ArrowUpRight, Package, Cpu, TrendingUp, Users, Settings, FileText } from 'lucide-react';
 import type { Product } from '@/lib/constants/products';
 import { useReducedMotion } from '@/hooks/use-reduced-motion';
 import { cn } from '@/lib/utils';
@@ -176,7 +176,15 @@ function ProductCard({ product, size = 'small' }: { product: Product; size?: 'la
                 {product.title}
               </h3>
             </div>
-            <span className="px-2 py-1 text-xs bg-brand/10 text-brand" aria-hidden="true">{bundleLabel}</span>
+            <div className="flex items-center gap-2 shrink-0">
+              <span className="px-2 py-1 text-xs bg-brand/10 text-brand" aria-hidden="true">{bundleLabel}</span>
+              {isExternal && (
+                <span className="inline-flex items-center gap-1 px-2 py-1 text-xs border border-border-primary text-text-secondary">
+                  <ArrowUpRight className="w-3 h-3" aria-hidden="true" />
+                  外部站点
+                </span>
+              )}
+            </div>
           </div>
 
           <p className={cn('text-text-secondary mb-4 leading-relaxed flex-1', isLarge ? 'text-base' : 'text-sm')}>

src/lib/cms/content-types.ts

@@ -291,6 +291,12 @@ const productFields: FieldDefinition[] = [
       { label: '已发布', value: '已发布' },
     ],
   },
+  {
+    name: 'externalUrl',
+    type: 'text',
+    label: '外部跳转链接',
+    description: '若设置，访问该产品详情页时将跳转到此 URL（如独立子域名产品）',
+  },
   {
     name: 'overview',
     type: 'textarea',