lululemon posted first-quarter sales that topped analysts’ estimates, helped by new products like an expanded selection of women’s tops. Sales rose 17 percent to $495.5 million in the quarter ended May 1, the Vancouver-based company said in a statement Wednesday. Analysts projected $487.6 million, on average. The results signal that lululemon’s new merchandise is gaining traction. The yogawear retailer has been adding more innovative pants and fabrics to appeal both to hardcore athletes and casual buyers.