If you haven’t been to Philadelphia lately you might be caught off guard by the fact that the current Four Seasons is an entirely different hotel a few blocks away from the one you used to know. Four Seasons Hotel Philadelphia at Comcast Center, to give it its full name, is no longer a historical landmark on Logan Square, but a skyscraper-topping refuge in Four Seasons’ new forward-looking contemporary-cool style. With architecture by Norman Foster, sound design by Brian Eno, floral arrangements by Jeff Leatham, and food by Jean-Georges Vongerichten, among others, this Four Seasons makes a big splash. And though it’s decidedly modern in style, the city’s traditionally minded Four Seasons clientele has embraced it with open arms. (Nobody particularly minds a spectacular 57th-floor infinity pool.)