悬链线拱：不锈钢包裹的纪念性

Design a monument in the manner of Eero Saarinen shaped as a weighted catenary curve, its cross-section an equilateral triangle tapering from a broad base to a narrow crown, clad entirely in mirror-finish stainless steel. Compose a single enormous arch rising from a mown riverside lawn, the triangular section clearly readable at the base, welded stainless panels reflecting sky and cloud so the form nearly dissolves at the top, no other structure in view, clear low sun with one leg lit and one in shadow, low upward view, 24mm lens, architectural photography, ultra photorealistic, 8K