diff --git a/infra/deploy/build.sh b/infra/deploy/build.sh
index d24a640..ec364f8 100755
--- a/infra/deploy/build.sh
+++ b/infra/deploy/build.sh
@@ -27,6 +27,8 @@ pnpm astro build
 # 按页字体 CSS 子集化（车道 A 任务 1）：裁 @font-face 声明数，构建仓与本地同链；
 # 存在性守卫：新文件未推送到 main 前构建仓无此脚本，绝不让发布链因车道在途文件断掉
 [ -f scripts/build-perf/subset-font-css.mjs ] && node scripts/build-perf/subset-font-css.mjs dist || echo "[build] subset 脚本未就绪，跳过"
+# 首页阻塞 CSS 内联（车道 D）：守卫先行同上——脚本未到 main 前绝不炸链
+[ -f scripts/build-perf/inline-home-css.mjs ] && node scripts/build-perf/inline-home-css.mjs || echo "[build] inline-home 脚本未就绪，跳过"
 
 echo "[build] rsync -> $STAGING"
 mkdir -p "$STAGING"
diff --git a/scripts/build-perf/gz-server.py b/scripts/build-perf/gz-server.py
new file mode 100644
index 0000000..9b2f9cc
--- /dev/null
+++ b/scripts/build-perf/gz-server.py
@@ -0,0 +1,29 @@
+import gzip, os, functools
+from http.server import ThreadingHTTPServer, SimpleHTTPRequestHandler
+
+class GZ(SimpleHTTPRequestHandler):
+    def do_GET(self):
+        path = self.translate_path(self.path)
+        if os.path.isdir(path):
+            path = os.path.join(path, 'index.html')
+        compressible = os.path.isfile(path) and not path.endswith(('.woff2', '.png', '.jpg', '.webp', '.ico', '.svg'))
+        if compressible:
+            with open(path, 'rb') as f: body = f.read()
+            gz = gzip.compress(body, 6)
+            self.send_response(200)
+            self.send_header('Content-Type', self.guess_type(path))
+            self.send_header('Content-Encoding', 'gzip')
+            self.send_header('Content-Length', str(len(gz)))
+            self.end_headers()
+            self.wfile.write(gz)
+        else:
+            super().do_GET()
+
+# 用法：gz-server.py [端口=18743] [目录=www-staging]
+# 团队标准测试床（车道 D 移交）：ThreadingHTTPServer+gzip=生产 nginx/ESA 等价口径；
+# 单线程 SimpleHTTPServer 双宗罪：不压缩致 LH 双峰伪影 + 与 SW 预缓存风暴竞速
+import sys
+port = int(sys.argv[1]) if len(sys.argv) > 1 else 18743
+root = sys.argv[2] if len(sys.argv) > 2 else os.path.expanduser('~/docker_apps/blog/www-staging')
+print(f'gz server on {port} -> {root}')
+ThreadingHTTPServer(('127.0.0.1', port), functools.partial(GZ, directory=root)).serve_forever()
diff --git a/scripts/build-perf/inline-home-css.mjs b/scripts/build-perf/inline-home-css.mjs
new file mode 100644
index 0000000..efb8b51
--- /dev/null
+++ b/scripts/build-perf/inline-home-css.mjs
@@ -0,0 +1,26 @@
+#!/usr/bin/env node
+/**
+ * 首页 render-blocking CSS 内联（车道 D）：把 dist/index.html 唯一的阻塞样式表
+ * （BaseLayout 共享块，~11KB）内联进 <head>。
+ * 慢模式双峰根因不在 css（实测：字体子集也内联后 6.0s 模式反成主流），
+ * 本脚本只保留 BaseLayout 内联这一确定性收益（省一次发现+下载跳）。
+ */
+import { readFileSync, writeFileSync } from 'node:fs';
+
+const htmlPath = 'dist/index.html';
+let html;
+try {
+  html = readFileSync(htmlPath, 'utf8');
+} catch {
+  console.error('[inline-home-css] dist/index.html 不存在，跳过');
+  process.exit(0);
+}
+
+const m = html.replace(/<noscript>[\s\S]*?<\/noscript>/g, '').match(/<link rel="stylesheet" href="(\/_astro\/[^"']+\.css)">/);
+if (!m || !html.includes(m[0])) {
+  console.log('[inline-home-css] 无阻塞样式表链接，跳过');
+  process.exit(0);
+}
+const css = readFileSync(`dist${m[1]}`, 'utf8');
+writeFileSync(htmlPath, html.replace(m[0], `<style>${css}</style>`));
+console.log(`[inline-home-css] ${m[1]} (${css.length}B) 已内联进首页`);
diff --git a/src/pages/index.astro b/src/pages/index.astro
index a75826d..78660df 100644
--- a/src/pages/index.astro
+++ b/src/pages/index.astro
@@ -73,13 +73,16 @@ const photos = (await getCollection('photos')).slice(0, 4);
       <a class="tap more" href="/gallery/">进入图库 →</a>
     </div>
     <div class="thumbs">
-      {photos.map((photo) => (
+      {photos.map((photo, i) => (
         <a class="thumb" href="/gallery/" aria-label={`查看图库：${photo.data.title}`}>
+          {/* 首两图 eager（Astro Image 默认 lazy 会把 LCP 压到 6s+），首图再拔 fetchpriority */}
           <Image
             src={photo.data.image}
             alt={photo.data.alt ?? photo.data.title}
             widths={[180, 360]}
             sizes="(min-width: 820px) 20vw, 42vw"
+            loading={i < 2 ? 'eager' : 'lazy'}
+            fetchpriority={i === 0 ? 'high' : undefined}
           />
         </a>
       ))}
diff --git a/tests/e2e.mjs b/tests/e2e.mjs
index 28e9164..12829b0 100644
--- a/tests/e2e.mjs
+++ b/tests/e2e.mjs
@@ -20,7 +20,7 @@ const ok = (name, pass, note = '') => {
 const browser = await chromium.launch();
 
 async function newPage(viewport, ua) {
-  const ctx = await browser.newContext({ viewport, userAgent: ua });
+  const ctx = await browser.newContext({ serviceWorkers: 'block', viewport, userAgent: ua });
   const page = await ctx.newPage();
   page.on('pageerror', (e) => console.log('  [pageerror]', String(e).slice(0, 120)));
   return page;