feat: update document

apps/nt-css/Readme.md

@@ -51,6 +51,13 @@ To use nt-css in your project, include the generated `styles.css` file in the `<
 
 You can customize nt-css by editing the `tailwind.config.js` file. Add your own styles or override existing ones to fit your design needs.
 
+```css
+@import 'nt-css/dist/styles.css';
+@tailwind base;
+@tailwind components;
+@tailwind utilities;
+```
+
 ```js
 /** @type {import('tailwindcss').Config} */
 module.exports = {