diff --git a/packages/core/scripts/gen-favicons.mjs b/packages/core/scripts/gen-favicons.mjs
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+++ b/packages/core/scripts/gen-favicons.mjs
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+/**
+ * # 脚本 gen-favicons.mjs
+ * 说明：以各站点 public/icon.svg（已有差异化品牌设计）为唯一设计源，生成：
+ *      1) sites/<site>/src/app/favicon.ico —— 16/32/48 三档 PNG-in-ICO（Next App Router 约定，自动注入 <link rel="icon">）
+ *      2) sites/<site>/public/icon-192.png / icon-512.png —— 覆盖原五站同图的通用 PWA 图标（manifest.webmanifest 引用）
+ * 用法：bun packages/core/scripts/gen-favicons.mjs
+ */
+import { readFileSync, writeFileSync } from "node:fs";
+import { dirname, join } from "node:path";
+import { fileURLToPath } from "node:url";
+import sharp from "sharp";
+
+const ROOT = join(dirname(fileURLToPath(import.meta.url)), "..", "..", "..", "sites");
+const SITES = ["ai-stack", "launchai", "the-ai-ledger", "devai-tools", "findai"];
+const ICO_SIZES = [16, 32, 48];
+const PNG_SIZES = [192, 512];
+
+/** # 函数 renderSvg
+ * 说明：SVG 按目标尺寸矢量栅格化为 PNG（按 viewBox 64 推导 density 保证清晰度）。
+ * 参数：svgBuffer 源 SVG；size 目标像素
+ * 返回：PNG Buffer
+ */
+async function renderSvg(svgBuffer, size) {
+  const density = Math.round((72 * size) / 64);
+  return sharp(svgBuffer, { density }).resize(size, size).png().toBuffer();
+}
+
+/** # 函数 packIco
+ * 说明：把多档 PNG 打包为 ICO 容器（Vista+ 支持 PNG 压缩条目）。
+ * 参数：pngs [{ size, buf }]
+ * 返回：ICO Buffer
+ */
+function packIco(pngs) {
+  const header = Buffer.alloc(6);
+  header.writeUInt16LE(0, 0); // 保留位
+  header.writeUInt16LE(1, 2); // 类型：图标
+  header.writeUInt16LE(pngs.length, 4);
+  const entries = Buffer.alloc(16 * pngs.length);
+  let offset = 6 + entries.length;
+  const blobs = [];
+  pngs.forEach((p, i) => {
+    const e = entries.subarray(i * 16, (i + 1) * 16);
+    e[0] = p.size >= 256 ? 0 : p.size; // 宽（0 表示 256）
+    e[1] = p.size >= 256 ? 0 : p.size; // 高
+    e[2] = 0; // 调色板色数
+    e[3] = 0; // 保留位
+    e.writeUInt16LE(1, 4); // 色彩平面
+    e.writeUInt16LE(32, 6); // 位深
+    e.writeUInt32LE(p.buf.length, 8);
+    e.writeUInt32LE(offset, 12);
+    offset += p.buf.length;
+    blobs.push(p.buf);
+  });
+  return Buffer.concat([header, entries, ...blobs]);
+}
+
+for (const site of SITES) {
+  const svg = readFileSync(join(ROOT, site, "public", "icon.svg"));
+  const ico = packIco(
+    await Promise.all(
+      ICO_SIZES.map(async (size) => ({ size, buf: await renderSvg(svg, size) }))
+    )
+  );
+  writeFileSync(join(ROOT, site, "src", "app", "favicon.ico"), ico);
+  for (const size of PNG_SIZES) {
+    const buf = await renderSvg(svg, size);
+    writeFileSync(join(ROOT, site, "public", `icon-${size}.png`), buf);
+  }
+  console.log(`✓ ${site}: favicon.ico(16/32/48) + icon-192.png + icon-512.png`);
+}
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