初始化

frontend-web/scripts/postcss-lightningcss-chrome109.mjs

@@ -0,0 +1,33 @@
+import postcss from "postcss";
+import { transform } from "lightningcss";
+
+const LEGACY_CHROME = 100 << 16;
+
+/**
+ * Keep Vite's PostCSS pipeline (required by Tailwind 4), then compile the
+ * resulting CSS to Chrome 100-compatible syntax for both dev and production.
+ */
+export default function lightningCssLegacyChrome() {
+  return {
+    postcssPlugin: "postcss-lightningcss-legacy-chrome",
+    OnceExit(root, { result }) {
+      const filename = root.source?.input.file ?? result.opts.from ?? "style.css";
+      const output = transform({
+        filename,
+        code: Buffer.from(root.toString()),
+        targets: { chrome: LEGACY_CHROME },
+        minify: false,
+      });
+      const compiled = postcss.parse(output.code.toString(), { from: filename });
+
+      root.removeAll();
+      root.append(compiled.nodes);
+
+      for (const warning of output.warnings) {
+        result.warn(warning.message, { plugin: "lightningcss" });
+      }
+    },
+  };
+}
+
+lightningCssLegacyChrome.postcss = true;