This example demonstrates a minimal HTML page that combines CSS, JavaScript, and D3 v7. It displays a large centered text message, “Hello SVG!”, styled via a `.message` class. The page loads D3 from a CDN and runs `index.js`, which logs a string concatenated with a value imported from `sth.js`. The rendering uses plain HTML and CSS, with no SVG elements actively rendered, as the provided SVG circle is commented out.