NEW YORK — The upbeat, feminine spring season was a natural for Vera Wang. Her elegant spring collection featured great looks for day and evening, many of them with a strong sportswear slant. And the night beauties she’s known for had a special ethereal charm. Here, one of them, in tiers of delicate ruffles, worn with a necklace from her stunning new fine jewelry collection. For more on the season, see photospread Tiering Up.