Style is an expression of the interest you take in the making of every sentence. It emerges, almost without intent, from your engagement with each sentence. It’s the discoveries you make in the making of the prose itself. Know what each sentence says, what it doesn’t say and what it implies.
Where ambiguity rules, there is no “style”. If you write ambiguous sentences, you create a state of uncontrolled implication. Pursue clarity instead as in the pursuit of clarity, style reveals itself.