Concord keeps a gold dome at its center, and the light it throws changes with the year — thin and silver in February, wide and warm by the end of June. Capital Mowing & Property Services works below it, in the dooryards and back lots of a city that is equal parts statehouse and neighborhood. Summer means straight passes across a lawn, trimmed corners, and clippings swept off the brick walks instead of left to scatter. Winter means a plowed drive and a cleared path before the first car turns onto Main Street. Two kinds of work, one habit: leave a place tidier than the weather found it.