The idea

a quiet serif header with a hairline rule floats over a pen-and-wash drawing of the river. Dark text works because the hero is light. A thin rust line wipes under the hovered link. The phone number sits next to the main button, so it is easy to call (on narrower screens it becomes a round phone icon).

Palette and fonts: paper, ink navy, rust, old gold · Instrument Serif, Libre Franklin