NEW YORK – Whether the look is soft or tailored, Cynthia Steffe likes layers. Among the strengths of her spring collection are flowing, romantic chiffon dresses that drift gracefully to the ankle. But that doesn’t mean Steffe won’t show some leg. Swingy slip dresses over matching T-shirts clear the knee, while fitted jackets with interesting seaming are buttoned high over notch-collared blouses and short, straight skirts or little button-front skorts.