fix(ui,a11y): 修 logo 深色模式不可见 + 补 tailwind font-calligraphy 工具类

修复 A：header logo 深色模式字被吞
- logo.svg 右侧公司名（睿新致遠 + NOVALON）硬编码 fill='#0A0E14'，
  深色背景下 background 同色不可见，红色印章下书法字与英文全部被吞。
- 复用既有 logo-white.svg（白字 + 红印章）作为深色版，
  header 渲染双 <Image>，按 html[data-theme] CSS 显隐。
- 双 Image 不占位（display:none），零 JS 闪烁，未来主题切换器自动生效。

修复 B：font-calligraphy 工具类不生成
- tailwind.config.js 的 fontFamily 此前未声明 calligraphy key，
  导致 font-calligraphy utility 永不生成，4 处装饰书法字
  （BrandStamp「值得信赖」/ ChallengeSection「使命」/ WhyUsSection「睿」「我们」）
  静默回退 sans。
- fontFamily 加 calligraphy: ['var(--font-calligraphy-system)']。

审计脚本：
- logo-compare*.mjs：生产 vs 本地 logo 对比定位
- logo-dark-verify.mjs：明暗双版渲染验证
- font-calligraphy-verify.mjs：合成探针验证 utility 生效

验证：
- type-check 0 error · lint 0 error（127 warnings 既有项与本次无关）
- 深浅色 header 截图：明暗版正确切换，书法字 + NOVALON 清晰可见
- font-calligraphy 合成探针 computed fontFamily = STKaiti, KaiTi, 楷体, SimKai, serif ✓

scripts/audit/font-calligraphy-verify.mjs

@@ -0,0 +1,34 @@
+// 终极：直接构造一个含 font-calligraphy className 的测试元素，
+// 把它注入到任意真实页面 DOM，读取 computed fontFamily —— 验证 CSS 规则真生效
+import { chromium } from 'playwright';
+const browser = await chromium.launch();
+const page = await browser.newPage({ viewport: { width: 1280, height: 800 } });
+await page.goto('http://127.0.0.1:3000/', { waitUntil: 'networkidle' });
+await page.waitForTimeout(2000);
+
+const result = await page.evaluate(() => {
+  // 找一个已渲染的根节点挂测试元素
+  const mount = document.body;
+  const probe = document.createElement('span');
+  probe.id = '__probe_font_calligraphy__';
+  probe.className = 'font-calligraphy';
+  probe.textContent = '使命';
+  probe.style.position = 'fixed';
+  probe.style.top = '-9999px';
+  mount.appendChild(probe);
+  const cs = getComputedStyle(probe);
+  const out = {
+    probeFontFamily: cs.fontFamily,
+    probeClassList: Array.from(probe.classList),
+  };
+  probe.remove();
+  return out;
+});
+
+await browser.close();
+console.log(JSON.stringify(result, null, 2));
+
+const expectedPrefix = 'STKaiti';
+const pass = result.probeFontFamily.startsWith(expectedPrefix);
+console.log(`\n[assert] probe computed fontFamily starts with ${expectedPrefix}: ${pass}`);
+console.log(`[result] ${pass ? 'PASS' : 'FAIL'}`);

scripts/audit/logo-compare-dark.mjs

@@ -0,0 +1,62 @@
+/**
+ * 深色模式 logo 对比：生产 vs 本地
+ * 强制 prefers-color-scheme: dark，截 header logo
+ */
+import { chromium } from 'playwright';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const OUT = path.join(process.cwd(), 'dogfood-ui-audit', 'logo-compare');
+fs.mkdirSync(OUT, { recursive: true });
+
+const TARGETS = [
+  { tag: 'prod-dark', url: 'https://www.novalon.cn/' },
+  { tag: 'local-dark', url: 'http://127.0.0.1:3000/' },
+];
+
+const browser = await chromium.launch();
+for (const t of TARGETS) {
+  const ctx = await browser.newContext({
+    viewport: { width: 1440, height: 900 },
+    deviceScaleFactor: 2,
+    colorScheme: 'dark', // 强制深色模式
+  });
+  const page = await ctx.newPage();
+  try {
+    await page.goto(t.url, { waitUntil: 'networkidle', timeout: 60000 });
+    await page.waitForTimeout(1500);
+
+    // 1) 截 header
+    const header = page.locator('header').first();
+    await header.screenshot({ path: path.join(OUT, `${t.tag}-header.png`) }).catch(async () => {
+      await page.screenshot({ path: path.join(OUT, `${t.tag}-header.png`), clip: { x: 0, y: 0, width: 1440, height: 80 } });
+    });
+
+    // 2) 探测 logo 元素的可视状态（在深色背景下）
+    const info = await page.evaluate(() => {
+      const imgs = [...document.querySelectorAll('img')].filter(i => /logo\.svg$/.test(i.getAttribute('src') || ''));
+      return imgs.map(i => {
+        const r = i.getBoundingClientRect();
+        const cs = getComputedStyle(i);
+        const parentCs = getComputedStyle(i.closest('header') || document.body);
+        return {
+          src: i.getAttribute('src'),
+          renderedW: Math.round(r.width),
+          renderedH: Math.round(r.height),
+          filter: cs.filter,
+          opacity: cs.opacity,
+          visibility: cs.visibility,
+          parentBg: parentCs.backgroundColor,
+          htmlBg: getComputedStyle(document.documentElement).backgroundColor,
+        };
+      });
+    });
+    console.log(`[${t.tag}]`);
+    for (const l of info) console.log('  ' + JSON.stringify(l));
+  } catch (e) {
+    console.log(`[${t.tag}] FAILED ${e.message.slice(0, 120)}`);
+  }
+  await ctx.close();
+}
+await browser.close();
+console.log('\n✓ 输出目录：' + OUT);

scripts/audit/logo-compare-pages.mjs

@@ -0,0 +1,49 @@
+/**
+ * 综合视觉对比：生产 vs 本地，多个关键位置
+ * 收集决定性证据，让用户指出"logo 原本是书法体但生产不是"指的具体位置
+ */
+import { chromium } from 'playwright';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const OUT = path.join(process.cwd(), 'dogfood-ui-audit', 'logo-compare');
+fs.mkdirSync(OUT, { recursive: true });
+
+const PAGES = [
+  { name: 'home', url: '/' },
+  { name: 'about-brand', url: '/about/brand' },
+  { name: 'about', url: '/about' },
+];
+
+const TARGETS = [
+  { tag: 'prod', base: 'https://www.novalon.cn' },
+  { tag: 'local', base: 'http://127.0.0.1:3000' },
+];
+
+const browser = await chromium.launch();
+
+for (const t of TARGETS) {
+  const ctx = await browser.newContext({
+    viewport: { width: 1440, height: 900 },
+    deviceScaleFactor: 2,
+  });
+  const page = await ctx.newPage();
+  for (const p of PAGES) {
+    const url = t.base + p.url;
+    try {
+      await page.goto(url, { waitUntil: 'networkidle', timeout: 60000 });
+      await page.waitForTimeout(1500);
+      // 截首屏（Hero + header 区域）
+      await page.screenshot({
+        path: path.join(OUT, `${t.tag}-${p.name}-fold.png`),
+        clip: { x: 0, y: 0, width: 1440, height: 900 },
+      });
+      console.log(`[${t.tag}] ${p.name} OK`);
+    } catch (e) {
+      console.log(`[${t.tag}] ${p.name} FAILED ${e.message.slice(0, 100)}`);
+    }
+  }
+  await ctx.close();
+}
+await browser.close();
+console.log('\n✓ 输出：' + OUT);

scripts/audit/logo-compare-toggle.mjs

@@ -0,0 +1,79 @@
+/**
+ * 模拟点深色模式按钮后的 header 截图
+ * 找切换按钮：theme toggle / data-theme / aria-label 含亮暗
+ */
+import { chromium } from 'playwright';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const OUT = path.join(process.cwd(), 'dogfood-ui-audit', 'logo-compare');
+fs.mkdirSync(OUT, { recursive: true });
+
+const TARGETS = [
+  { tag: 'prod', url: 'https://www.novalon.cn/' },
+  { tag: 'local', url: 'http://127.0.0.1:3000/' },
+];
+
+const browser = await chromium.launch();
+for (const t of TARGETS) {
+  const ctx = await browser.newContext({
+    viewport: { width: 1440, height: 900 },
+    deviceScaleFactor: 2,
+  });
+  const page = await ctx.newPage();
+  try {
+    await page.goto(t.url, { waitUntil: 'networkidle', timeout: 60000 });
+    await page.waitForTimeout(1500);
+
+    // 1) 找主题切换按钮
+    const btnInfo = await page.evaluate(() => {
+      const candidates = [
+        ...document.querySelectorAll('header button, header [role="button"], [data-theme-toggle], [aria-label*="深" i], [aria-label*="暗" i], [aria-label*="dark" i], [aria-label*="theme" i], [aria-label*="切换" i]'),
+      ];
+      return candidates.map(b => ({
+        tag: b.tagName,
+        label: b.getAttribute('aria-label'),
+        text: (b.textContent || '').slice(0, 30),
+        className: (b.className || '').toString().slice(0, 60),
+        data: JSON.stringify(b.dataset).slice(0, 80),
+      })).slice(0, 6);
+    });
+    console.log(`[${t.tag}] 候选切换按钮:`, JSON.stringify(btnInfo, null, 2));
+
+    // 2) 直接通过 localStorage 强制 dark（更稳）
+    await page.evaluate(() => {
+      try { localStorage.setItem('novalon-theme', 'dark'); } catch {}
+    });
+    await page.reload({ waitUntil: 'networkidle' });
+    await page.waitForTimeout(1500);
+
+    // 3) 截深色模式下的 header
+    const header = page.locator('header').first();
+    await header.screenshot({ path: path.join(OUT, `${t.tag}-dark-header.png`) }).catch(async () => {
+      await page.screenshot({ path: path.join(OUT, `${t.tag}-dark-header.png`), clip: { x: 0, y: 0, width: 1440, height: 80 } });
+    });
+
+    // 4) 探测 logo 在深色模式下的实际颜色
+    const logoState = await page.evaluate(() => {
+      const img = [...document.querySelectorAll('img')].find(i => /logo\.svg$/.test(i.getAttribute('src') || ''));
+      if (!img) return { found: false };
+      const r = img.getBoundingClientRect();
+      const parent = img.closest('header') || document.body;
+      return {
+        found: true,
+        src: img.getAttribute('src'),
+        renderedW: Math.round(r.width),
+        renderedH: Math.round(r.height),
+        parentBg: getComputedStyle(parent).backgroundColor,
+        htmlClass: document.documentElement.className,
+        htmlDataTheme: document.documentElement.getAttribute('data-theme'),
+      };
+    });
+    console.log(`[${t.tag}] dark-mode logo state:`, JSON.stringify(logoState, null, 2));
+  } catch (e) {
+    console.log(`[${t.tag}] FAILED ${e.message.slice(0, 200)}`);
+  }
+  await ctx.close();
+}
+await browser.close();
+console.log('\n✓ 输出：' + OUT);

scripts/audit/logo-compare.mjs

@@ -0,0 +1,77 @@
+/**
+ * Logo 对比诊断：生产环境 vs 本地 dev
+ *
+ * 用法：node scripts/audit/logo-compare.mjs
+ * 输出：dogfood-ui-audit/logo-compare/{prod,local}-header.png + logo-meta.json
+ */
+import { chromium } from 'playwright';
+import fs from 'node:fs';
+import path from 'node:path';
+
+const OUT = path.join(process.cwd(), 'dogfood-ui-audit', 'logo-compare');
+fs.mkdirSync(OUT, { recursive: true });
+
+const TARGETS = [
+  { tag: 'prod', url: 'https://www.novalon.cn/' },
+  { tag: 'local', url: 'http://127.0.0.1:3000/' },
+];
+
+const browser = await chromium.launch();
+const meta = {};
+
+for (const t of TARGETS) {
+  const ctx = await browser.newContext({
+    viewport: { width: 1440, height: 900 },
+    deviceScaleFactor: 2,
+  });
+  const page = await ctx.newPage();
+  const errors = [];
+  page.on('requestfailed', r => errors.push('FAILED ' + r.url()));
+  page.on('console', m => { if (m.type() === 'error') errors.push('CONSOLE ' + m.text()); });
+
+  try {
+    await page.goto(t.url, { waitUntil: 'networkidle', timeout: 60000 });
+    await page.waitForTimeout(1500);
+
+    // header logo 元素探测
+    const info = await page.evaluate(() => {
+      const imgs = [...document.querySelectorAll('img')]
+        .filter(i => /logo/i.test(i.getAttribute('src') || ''));
+      return imgs.map(i => {
+        const r = i.getBoundingClientRect();
+        const cs = getComputedStyle(i);
+        return {
+          src: i.getAttribute('src'),
+          currentSrc: i.currentSrc,
+          renderedW: Math.round(r.width),
+          renderedH: Math.round(r.height),
+          naturalW: i.naturalWidth,
+          naturalH: i.naturalHeight,
+          complete: i.complete,
+          fontFamily: cs.fontFamily,
+        };
+      });
+    });
+
+    // 截 header 区域（放大到 logo 可见）
+    const header = page.locator('header').first();
+    await header.screenshot({ path: path.join(OUT, `${t.tag}-header.png`) }).catch(async () => {
+      await page.screenshot({ path: path.join(OUT, `${t.tag}-header.png`), clip: { x: 0, y: 0, width: 1440, height: 80 } });
+    });
+
+    meta[t.tag] = { url: t.url, logos: info, errors };
+    console.log(`[${t.tag}] OK  logos=${info.length}  errors=${errors.length}`);
+    for (const l of info) {
+      console.log(`   src=${l.src}  currentSrc=${l.currentSrc}`);
+      console.log(`   rendered=${l.renderedW}x${l.renderedH}  natural=${l.naturalW}x${l.naturalH}  complete=${l.complete}`);
+    }
+  } catch (e) {
+    meta[t.tag] = { url: t.url, error: e.message.slice(0, 200), errors };
+    console.log(`[${t.tag}] FAILED ${e.message.slice(0, 120)}`);
+  }
+  await ctx.close();
+}
+
+fs.writeFileSync(path.join(OUT, 'logo-meta.json'), JSON.stringify(meta, null, 2));
+await browser.close();
+console.log('\n✓ 输出目录：' + OUT);

scripts/audit/logo-dark-verify.mjs

@@ -0,0 +1,55 @@
+// 验证 header logo 明暗双版：浅色应显示 logo.svg（黑字），深色应显示 logo-white.svg（白字）
+// 用法：node scripts/audit/logo-dark-verify.mjs
+import { chromium } from 'playwright';
+
+const BASE = 'http://127.0.0.1:3000';
+const OUT = 'dogfood-output/logo-dark-verify';
+
+const shots = [];
+
+async function run() {
+  const browser = await chromium.launch();
+  const ctx = await browser.newContext({ viewport: { width: 1280, height: 800 } });
+  const page = await ctx.newPage();
+
+  // 浅色（默认）
+  await page.goto(BASE, { waitUntil: 'networkidle' });
+  await page.waitForTimeout(800);
+  const lightSrc = await page.$eval('header img', (el) => el.getAttribute('src'));
+  const visibleLight = await getVisible(page);
+  await page.screenshot({ path: `${OUT}/header-light.png` });
+  shots.push({ theme: 'light', htmlDataTheme: await page.getAttribute('html', 'data-theme'), firstImgSrc: lightSrc, visible: visibleLight });
+
+  // 深色：设 localStorage 后 reload（与站点内联脚本一致）
+  await page.evaluate(() => localStorage.setItem('novalon-theme', 'dark'));
+  await page.goto(BASE, { waitUntil: 'networkidle' });
+  await page.waitForTimeout(800);
+  const visibleDark = await getVisible(page);
+  const darkSrc = await page.$eval('header img', (el) => el.getAttribute('src')).catch(() => 'N/A');
+  await page.screenshot({ path: `${OUT}/header-dark.png` });
+  shots.push({ theme: 'dark', htmlDataTheme: await page.getAttribute('html', 'data-theme'), firstImgSrc: darkSrc, visible: visibleDark });
+
+  await browser.close();
+
+  console.log(JSON.stringify(shots, null, 2));
+  // 断言：浅色无 data-theme 属性（null），可见 logo.svg；深色 data-theme=dark，可见 logo-white.svg
+  const lightOk = shots[0].visible === 'logo.svg' && shots[0].htmlDataTheme !== 'dark';
+  const darkOk = shots[1].visible === 'logo-white.svg' && shots[1].htmlDataTheme === 'dark';
+  console.log(`\n[assert] light shows logo.svg: ${lightOk}`);
+  console.log(`[assert] dark shows logo-white.svg: ${darkOk}`);
+  console.log(`[result] ${lightOk && darkOk ? 'PASS' : 'FAIL'}`);
+}
+
+// 返回当前实际可见（display !== none）的 logo img 的 src
+async function getVisible(page) {
+  return page.evaluate(() => {
+    const imgs = Array.from(document.querySelectorAll('header img'));
+    const vis = imgs.filter((i) => {
+      const s = getComputedStyle(i);
+      return s.display !== 'none' && s.visibility !== 'hidden' && Number(s.opacity) > 0;
+    });
+    return vis.length ? vis[0].getAttribute('src') : 'NONE_VISIBLE';
+  });
+}
+
+run().catch((e) => { console.error(e); process.exit(1); });

src/app/globals.css

@@ -380,6 +380,17 @@ body {
   --grid-gap-2xl: 3rem;
 }
 
+/* === Logo 明暗双版（html[data-theme] 驱动）===
+   站点主题由 html[data-theme='dark'] 属性驱动，而非 .dark class，
+   因此 Tailwind dark: 变体（darkMode:'class'）不匹配 —— 用显式属性选择器切换。
+   - logo.svg（深黑字）用于浅色背景；logo-white.svg（白字）用于深色背景。
+   两个 <Image> 都在 DOM 内、按 data-theme 显隐（display:none，不占位），
+   无 JS 闪烁，未来主题切换器改 data-theme 时自动生效。
+   SSR 初始 HTML 无 data-theme → 默认显示 light 版，head 内联脚本同步设置
+   data-theme 后即时切换，不产生重叠。 */
+html[data-theme='dark'] .logo-on-light { display: none; }
+html:not([data-theme='dark']) .logo-on-dark { display: none; }
+
 /* === 暗黑模式（html[data-theme='dark']）===
    策略：仅覆盖 CSS 变量，组件无需逐元素反色。
    - 文字墨色 --color-ink 反色为浅色（其语义收窄为"文字/描边跟随主题"）

src/components/layout/header.tsx

@@ -96,16 +96,27 @@ function HeaderContent() {
               className="relative flex items-center group/logo"
               aria-label="返回首页"
             >
+              {/* Logo 明暗双版：浅色背景用 logo.svg（黑字），深色背景用 logo-white.svg（白字）。
+                  按 html[data-theme] 显隐（规则见 globals.css），修复黑字在深色背景被吞的 bug。 */}
               <Image
                 src="/logo.svg"
                 alt={config.name}
                 width={160}
                 height={40}
-                className="relative transition-all duration-300 ease-out group-hover/logo:scale-[1.02] w-auto h-8 md:h-10"
+                className="logo-on-light relative transition-all duration-300 ease-out group-hover/logo:scale-[1.02] w-auto h-8 md:h-10"
                 loading="eager"
                 priority
                 suppressHydrationWarning
               />
+              <Image
+                src="/logo-white.svg"
+                alt={config.name}
+                width={160}
+                height={40}
+                className="logo-on-dark relative transition-all duration-300 ease-out group-hover/logo:scale-[1.02] w-auto h-8 md:h-10"
+                loading="eager"
+                suppressHydrationWarning
+              />
             </StaticLink>
 
             <nav className="hidden md:flex items-center gap-0.5" role="navigation" aria-label="主导航" data-testid="desktop-navigation">

tailwind.config.js

@@ -124,6 +124,10 @@ module.exports = {
         mono: ['var(--font-mono)'],
         brand: ['var(--font-brand)'],
         serif: ['var(--font-serif)'],
+        // 书法体：globals.css 的 --font-calligraphy-system（STKaiti / KaiTi 系统字栈）
+        // 此前 fontFamily 未声明该 key，导致 font-calligraphy utility 不生成，
+        // 4 处装饰书法字（why-us / challenge / brand-visuals）静默回退 sans。
+        calligraphy: ['var(--font-calligraphy-system)'],
       },
       fontSize: {
         caption: 'var(--font-size-caption)',