feat(cms): 品牌叙事与结构性文案全站 CMS 化并补齐信任证据阶段 0

- 品牌叙事内核（价值主张/定位/承诺/三支柱/语气）下沉 site-config，经 SiteConfigProvider 注入全站
- 新增 page-copy 内容模型承载结构性文案（章节标题/眉标/描述/CTA/空状态），覆盖首页+服务/方案/产品/案例/新闻列表页，「CMS 优先 + 硬编码兜底」不白屏
- 首页「首批客户共创计划」板块（earlyAccessTitle/CtaLabel/Status 驱动）替代单行标签，如实呈现共创/内测/授权公开三档状态
- 关于页资质区数据空时如实展示「建设中」空态
- 零编造：不虚构客户/数据/资质

src/app/(marketing)/services/page.tsx

@@ -1,6 +1,6 @@
 import { Metadata } from 'next';
 import { COMPANY_INFO } from '@/lib/constants';
-import { getPublishedItems } from '@/lib/cms/data-server';
+import { getPublishedItems, getPageCopy } from '@/lib/cms/data-server';
 import type { Service } from '@/lib/constants/services';
 import ServicesContentV3 from './services-content-v3';
 
@@ -15,5 +15,7 @@ export const revalidate = 3600;
 export default async function ServicesPage() {
   const items = await getPublishedItems('service');
   const services = items.map((item) => ({ ...item.data, id: item.data.id || item.id, slug: item.data.slug || item.slug, title: item.data.title || item.title } as unknown as Service));
-  return <ServicesContentV3 services={services} />;
+  // 服务页结构性文案（Hero/区块标题/CTA/空状态），CMS 未配置时组件内部兜底
+  const pageCopy = await getPageCopy('services').catch(() => null);
+  return <ServicesContentV3 services={services} pageCopy={pageCopy?.data ?? null} />;
 }