磨痕比橫杆更誠實地記著舊高度

A 1:1 square cutout asset: the entire high-jump rig and its crank-turning glove sit isolated on a fully transparent background — alpha equals zero, never white or colored, no checkerboard pattern, a genuine alpha channel. The rig and glove occupy the middle 80% of the frame width, with at least 8% clear transparent margin on both left and right edges and at least 6% top and bottom, so every part stays fully inside the frame with generous breathing room; the transparency runs uniformly to all four edges, and a soft semi-transparent black contact shadow sits in the alpha channel beneath both upright bases, darkest where they touch ground and fading outward. The rig itself: two plain brushed-steel uprights hold one straight matte white horizontal bar with blue end caps, raised well above a pair of faint pale scuff smudges — identical marks on both uprights at the exact same lower height, recording where the bar used to sit. The bar reads perfectly level, both ends matching height, and the clear vertical gap between the old scuff marks and the current bar position makes the raised standard legible at a glance. Both uprights stay blank and unprinted apart from those grey smudges. At the base of the left upright, a black crank handle with a rounded red knob juts outward, gripped mid-turn by a single white classic cartoon glove — a complete four-fingers-and-thumb hand, floating free with no attached arm; exactly five digits are visible and anatomically accounted for. Light it as crisp conceptual studio photography: clean highlights on the steel, matte white on the bar, one deep-red accent at the crank knob, bright soft illumination from the upper left. Everything in the shot stays grounded and still except for the glove's mid-turn grip on the crank.