From the top of Belmont Hill the Boston skyline stands lit across the flats, and on a storm night it goes soft and gauzy behind the falling snow. James W. Ktona Landscaping is out under it, plowing the steep drives that switchback down the hill and shoveling the walks and front steps below. Grade is the whole problem in Belmont — a shaded slope that glazes over at dusk needs sand as much as it needs a blade. The crew works the dark hours so that the morning is only a morning. Nothing dramatic: open drives, a passable walk, a town that gets on with it.