SpecGrid from @kuppwest/apple-clean. Use via `window.KuppwestAppleClean.SpecGrid` (bundle loaded from the root `_ds_bundle.js`). Wrap the tree in `<Page>` (full provider chain in README.md — components read theme/i18n from that context).

Two-column grid of spec panels (`.kwac-specs`), max 960px. Single column
below 740px. Put it inside a `Section alt`.

## Props

```ts
interface SpecGridProps {
  /** Two `SpecColumn`s, e.g. "Anhängerkupplung" and "Elektrosatz". */
  children: React.ReactNode;
}
```