fix(metrics): 数字口径 basis 结构强制，删除详情页虚构佐证

复评 P0 收尾：把「每个数字带口径」从个别页自觉升级为结构性强制。
- metrics-basis.ts：METRIC_BASES / METRIC_BASIS_NOTES + resolveMetricBasis
  （缺失·非法·大小写错一律回落最弱 target）+ weakestBasis（一组数字取最弱者聚合）
  + FORBIDDEN_PROOF_PHRASES；MetricsBasisNote 收 basis prop
- 类型层 Product.metrics / DataProof / ServiceMetric / Solution.outcomes /
  DataMetric / about keyMetrics 全部加 basis?；9 处调用点改为 basis 驱动
- content-types.ts 新增共享 metricBasisField（select）展开进 9 处字段定义；
  trustSignals 有意跳过（已有自己的 source）。seed 显式声明 55 条 target
- 删除字面虚构佐证：详情页「每一项指标都源自真实客户案例」、「经过实战验证」×3、
  「来自真实客户的使用数据」、「经实际场景验证」；给此前完全裸奔的 3 个共享
  数字渲染器（DataProofSection / detail-trust / detail-product-value）补上角注
- metrics-basis.test 3→16 例：basis 解析正控制、weakestBasis 次序、seed 全量
  显式声明 + 覆盖证明（防空跑假绿）+ 禁任何条目自称 verified + 禁词全源码扫描
- 文档同源：DESIGN.md 立 The Declared-Basis Rule；PRODUCT.md 常驻禁令；
  CONTEXT.md 记决策并警示 admin 字段需重跑 seed 才激活

边界：CMS 字段定义存 ContentModel.fields（DB 内 JSON），basis 下拉须重跑 seed
才会出现在 admin 表单；本次 DB 与 seed 数据值零改动，渲染端对缺 basis 兜底 target。

Gates: type-check 0 · jest 1594/132 · contrast 7/7 · headings 10/10
lint 0e/128w（与 stash 基线逐行比对，零新增告警）

src/components/content/sections.tsx

@@ -5,6 +5,8 @@ import { ScrollReveal, StaggerReveal } from '@/components/ui/scroll-reveal';
 import { EASE_OUT } from '@/components/ui/page-decoration';
 import { CheckCircle2, ChevronDown } from 'lucide-react';
 import { cn } from '@/lib/utils';
+import { MetricsBasisNote } from '@/components/ui/metrics-basis-note';
+import { weakestBasis, type MetricBasis } from '@/lib/constants/metrics-basis';
 import { useState } from 'react';
 
 export interface MethodologyLayer {
@@ -318,6 +320,7 @@ export interface DataMetric {
   description?: string;
   trend?: string;
   trendUp?: boolean;
+  basis?: MetricBasis;
 }
 
 export interface DataProofSectionProps {
@@ -328,6 +331,7 @@ export interface DataProofSectionProps {
 
 export function DataProofSection({ title, subtitle, metrics }: DataProofSectionProps) {
   if (!metrics || metrics.length === 0) return null;
+  const basis = weakestBasis(metrics.map((m) => m.basis));
 
   return (
     <section className="relative py-20 sm:py-28 md:py-32 lg:py-40 overflow-hidden bg-bg-primary">
@@ -375,6 +379,7 @@ export function DataProofSection({ title, subtitle, metrics }: DataProofSectionP
             ))}
           </StaggerReveal>
         </div>
+        <MetricsBasisNote basis={basis} className="mt-6" />
       </div>
     </section>
   );

src/components/detail/detail-product-value.tsx

@@ -15,6 +15,8 @@ import {
   type LucideIcon,
 } from 'lucide-react';
 import type { Product } from '@/lib/constants/products';
+import { MetricsBasisNote } from '@/components/ui/metrics-basis-note';
+import { weakestBasis } from '@/lib/constants/metrics-basis';
 
 interface ProductValueSectionProps {
   product: Product;
@@ -250,11 +252,11 @@ export function ProductValueSection({ product }: ProductValueSectionProps) {
               <div className="flex items-center gap-3 mb-6">
                 <div className="w-10 h-px bg-brand" />
                 <span className="text-[13px] tracking-[0.12em] font-semibold text-brand-ink">
-                  效果数据
+                  设计目标
                 </span>
               </div>
               <h3 className="text-2xl sm:text-3xl md:text-4xl lg:text-5xl font-black text-ink tracking-tight leading-[0.95]">
-                用真实效果证明价值
+                以可量化的目标约束交付
               </h3>
             </div>
 
@@ -275,6 +277,10 @@ export function ProductValueSection({ product }: ProductValueSectionProps) {
                 );
               })}
             </div>
+            <MetricsBasisNote
+              basis={weakestBasis(product.dataProofs.map((proof) => proof.basis))}
+              className="mt-8"
+            />
           </motion.div>
         )}
       </div>

src/components/detail/detail-trust-section.tsx

@@ -5,6 +5,8 @@ import { useRef, useEffect, useState } from 'react';
 import { CaseStudyCard } from './detail-case-study';
 import { CertificationList } from './detail-certification';
 import type { CaseStudy, DataProof, Certification } from '@/lib/constants/products';
+import { MetricsBasisNote } from '@/components/ui/metrics-basis-note';
+import { weakestBasis } from '@/lib/constants/metrics-basis';
 
 interface DetailTrustSectionProps {
   caseStudies?: CaseStudy[];
@@ -84,13 +86,13 @@ export function DetailTrustSection({
               <div className="flex items-center gap-3 mb-6">
                 <div className="w-10 h-px bg-brand" />
                 <span className="text-[13px] tracking-[0.12em] font-semibold text-brand-ink">
-                  用真实效果证明价值
+                  目标口径
                 </span>
               </div>
               <h2 className="text-2xl sm:text-3xl md:text-4xl lg:text-5xl font-black text-ink tracking-tight leading-[0.95]">
-                来自真实客户的使用数据，
+                以设计目标约束交付，
                 <br />
-                让效果可衡量、可验证
+                在首批共创中转为可核验数据
               </h2>
             </motion.div>
 
@@ -114,6 +116,10 @@ export function DetailTrustSection({
                 </motion.div>
               ))}
             </div>
+            <MetricsBasisNote
+              basis={weakestBasis(dataProofs.map((proof) => proof.basis))}
+              className="mt-8"
+            />
           </div>
         )}
 

src/components/detail/detail.test.tsx

@@ -435,14 +435,14 @@ describe('ProductValueSection', () => {
   it('should render data proofs when available', async () => {
     const { ProductValueSection } = await import('./detail-product-value');
     render(<ProductValueSection product={mockProduct} />);
-    expect(screen.getByText('用真实效果证明价值')).toBeInTheDocument();
+    expect(screen.getByText('以可量化的目标约束交付')).toBeInTheDocument();
   });
 
   it('should not render data proofs section when empty', async () => {
     const { ProductValueSection } = await import('./detail-product-value');
     const productWithoutData = { ...mockProduct, dataProofs: [] };
     render(<ProductValueSection product={productWithoutData} />);
-    expect(screen.queryByText('用真实效果证明价值')).not.toBeInTheDocument();
+    expect(screen.queryByText('以可量化的目标约束交付')).not.toBeInTheDocument();
   });
 
 });
@@ -462,8 +462,10 @@ describe('DetailTrustSection', () => {
         dataProofs={mockProduct.dataProofs}
       />
     );
-    expect(screen.getByText('用真实效果证明价值')).toBeInTheDocument();
+    expect(screen.getByText('目标口径')).toBeInTheDocument();
     expect(screen.getByText(mockProduct.dataProofs[0]!.metric)).toBeInTheDocument();
+    // 未声明 basis 的 dataProofs 必须自动落最弱口径角注，不得裸奔
+    expect(screen.getByTestId('metrics-basis-note')).toHaveTextContent('目标口径，非既成结果');
   });
 
   it('should render case studies', async () => {
@@ -500,7 +502,7 @@ describe('DetailTrustSection', () => {
         accentColor="#C41E3A"
       />
     );
-    expect(screen.getByText('用真实效果证明价值')).toBeInTheDocument();
+    expect(screen.getByText('目标口径')).toBeInTheDocument();
     expect(screen.getByText('他们已经实现了转型突破')).toBeInTheDocument();
     expect(screen.getByText('资质认证')).toBeInTheDocument();
   });

src/components/detail/early-access-notice.tsx

@@ -9,7 +9,7 @@
  * - 内容源于 `EARLY_ACCESS` 常量（company.ts L119），单一真源。
  *
  * 与 L3SignalsSlot 关系：EarlyAccessNotice 是 L3EmptyFallback 的次要兜底块，
- * 在 signals（4 类信号卡）下方呈现——回答「为什么没有真实客户案例」这个问题。
+ * 在 signals（4 类信号卡）下方呈现——回答「为什么还没有可公开案例」这个问题。
  */
 
 import Link from 'next/link';

src/components/ui/metrics-basis-note.tsx

@@ -1,14 +1,21 @@
 import { cn } from '@/lib/utils';
-import { METRICS_BASIS_NOTE } from '@/lib/constants/metrics-basis';
+import { METRIC_BASIS_NOTES, resolveMetricBasis, type MetricBasis } from '@/lib/constants/metrics-basis';
 
 /**
  * 结果型数字（提升百分比 / 可用性 / 达标率等）下方的口径角注。
- * 全站统一文案，见 METRICS_BASIS_NOTE。供 solutions / services / home / about / products 复用。
+ * 文案按数字声明的 `basis` 口径解析，未声明一律按最弱的 target 处理，见 METRIC_BASIS_NOTES。
+ * 供 solutions / services / home / about / products 与详情页 DataProofSection 复用。
  */
-export function MetricsBasisNote({ className }: { className?: string }) {
+export function MetricsBasisNote({
+  className,
+  basis = 'target',
+}: {
+  className?: string;
+  basis?: MetricBasis | string | null;
+}) {
   return (
     <p className={cn('text-xs text-text-muted', className)} data-testid="metrics-basis-note">
-      {METRICS_BASIS_NOTE}
+      {METRIC_BASIS_NOTES[resolveMetricBasis(basis)]}
     </p>
   );
 }