UnoCSS version

latest

Describe the bug

we have an class like this class="bg-background group/calendar p-3 [--cell-size:--spacing(8)] [[data-slot=card-content]_&]:bg-transparent [[data-slot=popover-content]_&]:bg-transparent rounded-md border shadow-sm"

tailiwndcss gives [--cell-size:--spacing(8)] = calc(var(--spacing)*8)

but unocss gives var(--spacing(8))

Reproduction

https://unocss.dev/play/#html=DwEwlgbgBAxgNgQwM5ILwCIDaBabMCmcc2SYAXvgFy5IAOCMYAdgOYAUAHAJQC66AfFGAB6cBH5A&config=JYWwDg9gTgLgBAbwFBzgEwKYDNgDsMDCEuOA5gDQpxhQYDOGMAgjDFMAEYCuMwWAnpVQ16jAJIBjYnSHVaDGAHU8aACyUAvnCxQIIOAHIuuCBLp0DSJBgAekWOmwBDLgBt4mHPiIlgpABTIqFBu9ABccADaVKiRBhJcdDB6ALQhrhgG5IhwUq7QEQa0aAZwGgC6spVUdAAW0DAJMHQRQaiGCUmpdQ1NBoUwtjAprqRwgzbD0E64pBhw9QBuGFBhE8ODTq5ZVBqyIgotUTFyokoqqv4AlLLC8owsbJw8fPzXt6cKktKBJ6h0Ei2GAiAEYAHQAJg%2BqAkaFwhVqrDALQA9Cj6CAwXUUTt2mUblRqhorkggA&css=PQKgBA6gTglgLgUzAYwK4Gc4HsC2YDCAyoWABYJQIA0YAhgHYAmYcUD6AZllDhWOqgAOg7nAB0YAGLcwCAB60cggDYIAXGBDAAUKDBi0mXGADe2sGC704AWgDuCGAHNScDQFYADJ4Dc5sAACtMLKAJ5gggCMLPK2ABR2pPBIcsoAlH4WAEa0yADWTlBYqEw2yFjK3Bpw5LxxAOTllVDoYpSMYgAs3vUZ2gC%2BmsBAA&options=N4XyA

.\[--cell-size\:--spacing\(8\)\] {
  --cell-size: calc(var(--spacing) * 8);
}

System Info

No response

Validations

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• The provided reproduction is a minimal reproducible example of the bug.