墙上那道叶影，干净利落

Single subject: one botanical silhouette, cast as a sharp-edged shadow across a plain plaster wall, occupying roughly the left third and lower two-thirds of a 2:3 frame -- a single dark form showing visible stem and three to five distinct leaf shapes. Hold the composition tall portrait 2:3, negative space concentrated across the right two-thirds and upper third, leaving clean wall area for a poster crop or later typography. Speak in abstract-photography terms: soft natural side light producing a crisp yet slightly feathered shadow edge, tonal falloff easing toward the right. Let the wall texture read as fine matte plaster with faint brush striations and micro-variation visible in the midtones. Bias color toward muted warm-beige midtones with deep charcoal shadow and a soft sage-green ambient tint in the reflected highlights. Keep focus shallow-to-moderate so the shadow edge and nearby wall texture stay crisp while the distant wall surface softens slightly. Styling stays minimal and unadorned -- no props, no lettering -- crop locked to a centered vertical axis within the 2:3 portrait frame.