Sprinter Duotone Step Window Editorial

Create a 16:9 editorial poster in the "Duotone Step Window" visual style.

**Subject & Composition:**
A fictional adult woman sprinting on an urban athletics track, captured mid-stride from a side-on low angle. Her rear leg extends back powerfully while her forward knee lifts high—dynamic but anatomically natural. She wears simple, unbranded running kit in plain contemporary design. Sparse lane lines are visible on the track surface. The runner moves continuously across the frame, her figure intersecting hard-edged stepped color windows that selectively re-ink portions of the photograph.

**Visual System (LOCKED):**
- **Photography treatment:** One continuous grainy action photograph spans the entire composition. Outside the light windows, render it as a black-on-{{base-color}} duotone. Inside the stepped white/light windows, re-ink it as {{spot-color}}-on-neutral-white. The image geometry remains perfectly aligned across every boundary—no breaks, no insets, no repeated figures.
- **Stepped window device:** Hard rectangular or stepped masks (the "windows") cut through the photograph, creating sharp graphic contrast. Design the window's scale, position, contour and number of turns to answer the runner's diagonal motion and energy. These are framing devices, not separate products.
- **Color palette:** Flat vivid {{base-color}} field with contrasting {{spot-color}} ink for the light-window zones. Black text. Maintain strong contrast between the duotone zones and the light windows—no pastels, no grunge, no natural-color portrait insets.
- **Typography:** Oversized regular-to-medium weight neo-grotesk sans-serif. Tightly set, asymmetric editorial hierarchy. Black type on the vivid base.
- **Texture:** Restrained photographic print grain throughout. Sharp graphic/photographic contrast—no photorealistic paper mockups or transparent canvas.

**Content to include:**
- Main headline: "City in motion" (large neo-grotesk, black)
- Emphatic oversized event numerals as an accent symbol
- Date label and a simple footer line as secondary text

All text, numerals, and scene are entirely fictional. No real event names, sponsors, logos, watermarks, QR codes, platform UI, cycling scenes, source portraits, or reference layouts. Keep the visual system; change the subject, text, and scene completely.

**Avoid:**
Disconnected anatomy, repeated person, generic scrapbook boxes, serif headline, heavy condensed or outline display type, hand-lettered headline, pastel wash, grunge scratches, unreadable required title.