diff --git a/packages/core/scripts/verify-widths.ts b/packages/core/scripts/verify-widths.ts
new file mode 100644
index 0000000..0322742
--- /dev/null
+++ b/packages/core/scripts/verify-widths.ts
@@ -0,0 +1,60 @@
+/**
+ * # 脚本 verify-widths
+ * 说明：验证五站 PC 端容器宽度统一为 80rem(1280px) > 1200px。
+ *      在 1440x900 视口下打开各站 /tools,测量:
+ *      1. .site-container 的 computed max-width(应为 1280px)
+ *      2. header 内 .site-container 的实际盒宽(应 1280px,且 > 1200)
+ *      3. 工具卡片网格的实际盒宽(应 1280px)
+ *      并整页截图供目检。
+ */
+import { chromium } from "playwright";
+
+const SITES = [
+  { name: "ai-stack", port: 3001 },
+  { name: "launchai", port: 3002 },
+  { name: "the-ai-ledger", port: 3003 },
+  { name: "devai-tools", port: 3004 },
+  { name: "findai", port: 3005 },
+];
+
+const browser = await chromium.launch({
+  executablePath: "/opt/brave.com/brave/brave",
+  args: ["--no-sandbox", "--disable-dev-shm-usage"],
+});
+
+let failed = false;
+for (const site of SITES) {
+  const page = await browser.newPage({ viewport: { width: 1440, height: 900 } });
+  await page.goto(`http://localhost:${site.port}/tools`, { waitUntil: "networkidle" });
+  const m = await page.evaluate(() => {
+    const cs = (el) => (el ? getComputedStyle(el).maxWidth : null);
+    const box = (el) => (el ? Math.round(el.getBoundingClientRect().width) : null);
+    const header = document.querySelector("header .site-container");
+    const grid = document.querySelector("header .site-container")
+      ? null
+      : null;
+    // /tools 页内容列:找第一个 grid 布局的工具列表容器(向上找最近的 .site-container)
+    const all = [...document.querySelectorAll(".site-container")];
+    const widths = all.slice(0, 6).map((el) => ({
+      cls: el.className.split(" ").slice(0, 3).join(" "),
+      maxW: cs(el),
+      w: box(el),
+    }));
+    // 卡片网格实际宽度
+    const gridEl = [...document.querySelectorAll(".grid")].find((g) => g.children.length >= 8);
+    return { count: all.length, widths, gridW: box(gridEl) };
+  });
+  const okMax = m.widths.every((w) => parseFloat(w.maxW) === 1280);
+  const okBox = m.widths.every((w) => w.w > 1200);
+  // 网格为容器 px-4(16px×2) 内的内容宽,≥1200 即达标
+  const pass = okMax && okBox && m.gridW >= 1200;
+  console.log(
+    `${pass ? "PASS" : "FAIL"} ${site.name}: containers=${m.count} grid=${m.gridW}px\n` +
+      m.widths.map((w) => `   ${w.w}px (max ${w.maxW}) ${w.cls}`).join("\n")
+  );
+  if (!pass) failed = true;
+  await page.screenshot({ path: `/tmp/width-${site.name}.png`, fullPage: false });
+  await page.close();
+}
+await browser.close();
+process.exit(failed ? 1 : 0);
diff --git a/packages/core/src/features/alternatives/components/views.tsx b/packages/core/src/features/alternatives/components/views.tsx
index df1e432..899303f 100644
--- a/packages/core/src/features/alternatives/components/views.tsx
+++ b/packages/core/src/features/alternatives/components/views.tsx
@@ -55,7 +55,7 @@ export async function AlternativesView({
   const url = `${baseUrl()}/${locale}/tools/${baseSlug}-alternatives`;
 
   return (
-    <div className="mx-auto max-w-4xl px-4 py-10 sm:px-6">
+    <div className="site-container px-4 py-10 sm:px-6">
       <FaqPageJsonLd faqs={seo.faqs} />
       <BreadcrumbJsonLd
         items={[
@@ -285,7 +285,7 @@ export async function ComparisonView({
         : null;
 
   return (
-    <div className="mx-auto max-w-4xl px-4 py-10 sm:px-6">
+    <div className="site-container px-4 py-10 sm:px-6">
       <BreadcrumbJsonLd
         items={[
           { name: "Home", url: `${baseUrl()}/${locale}` },
diff --git a/packages/core/src/pages/[locale]/(marketing)/loading.tsx b/packages/core/src/pages/[locale]/(marketing)/loading.tsx
index 1f60865..84f914b 100644
--- a/packages/core/src/pages/[locale]/(marketing)/loading.tsx
+++ b/packages/core/src/pages/[locale]/(marketing)/loading.tsx
@@ -10,7 +10,7 @@
 export default function Loading() {
   return (
     <div className="site-container px-4 py-12 sm:px-6">
-      <div className="loading-shell mx-auto max-w-5xl">
+      <div className="loading-shell">
         {/* ai-stack（classic）：居中标题 + 三列方角卡片 */}
         <div className="loading-variant lv-ai-stack">
           <div className="mb-10 space-y-3 text-center">
diff --git a/packages/core/src/styles/globals.css b/packages/core/src/styles/globals.css
index 03f6974..f423b3f 100644
--- a/packages/core/src/styles/globals.css
+++ b/packages/core/src/styles/globals.css
@@ -104,7 +104,8 @@ html {
     text-wrap: balance;
   }
   /* 站点统一容器:宽度由各主题的 --container 令牌决定,
-     header / footer / 所有营销页面共用,保证整站宽度一致 */
+     header / footer / 所有营销页面共用,保证整站宽度一致。
+     宽度策略:PC 端(视口 > 1200px)一律 80rem(1280px),正文段落阅读宽度不受影响 */
   .site-container {
     margin-inline: auto;
     width: 100%;
@@ -134,6 +135,7 @@ html {
 
 /* ---------- 1. AI Stack：深蓝专业（浅：白底蓝主色 / 深：海军蓝） ---------- */
 [data-theme="ai-stack"] {
+  --container: 80rem;
   --primary: 224 64% 33%;
   --primary-foreground: 0 0% 100%;
   --ring: 224 64% 33%;
@@ -163,7 +165,7 @@ html {
 
 /* ---------- 2. LaunchAI：暖橙社区（浅：暖白橙 / 深：深棕橙） ---------- */
 [data-theme="launchai"] {
-  --container: 72rem;
+  --container: 80rem;
   --primary: 16 85% 50%;
   --primary-foreground: 0 0% 100%;
   --background: 30 55% 97%;
@@ -187,7 +189,7 @@ html {
 
 /* ---------- 3. The AI Ledger：报纸（浅：纸白墨黑 / 深：炭黑米白） ---------- */
 [data-theme="the-ai-ledger"] {
-  --container: 64rem;
+  --container: 80rem;
   --primary: 24 10% 12%;
   --primary-foreground: 40 40% 98%;
   --background: 42 45% 97%;
@@ -226,7 +228,7 @@ html {
 
 /* ---------- 4. DevAI.tools：终端（深：默认深色 / 浅：日间终端） ---------- */
 [data-theme="devai-tools"] {
-  --container: 64rem;
+  --container: 80rem;
   --primary: 150 60% 38%;
   --primary-foreground: 0 0% 100%;
   --background: 150 20% 97%;
@@ -268,7 +270,7 @@ html {
 
 /* ---------- 5. findai：极简（浅：纯白紫 / 深：深紫黑） ---------- */
 [data-theme="findai"] {
-  --container: 56rem;
+  --container: 80rem;
   --primary: 262 65% 52%;
   --primary-foreground: 0 0% 100%;
   --ring: 262 65% 52%;