复古四城：水彩墨水的城市地标旅行明信片

VINTAGE CITY TRAVEL POSTER - [CITY, COUNTRY] (3:4)

A loose, hand-painted watercolor-and-ink travel sketch of [CITY], with fast broken lines, uneven washes, generous bare paper, and warm golden-hour light. Bright white cold-press paper — no cream or sepia cast.

SUBJECT
Hero: [PRIMARY LANDMARK], viewed from street level, frontal and slightly upward-tilted, full height within the frame, occupying roughly 68–75% of the poster height and positioned on the right third.

Behind it: [SECONDARY LANDMARK], smaller and lower on the left, with 2–3 soft architectural masses suggesting the surrounding city. Include only the landmarks specified — no unrelated attractions.

IDENTITY LOCK
The primary landmark must remain clearly recognizable through its defining silhouette, proportions, major structural features, and distinctive crown, roofline, dome, spire, or tower top. These features receive the strongest contrast and must never be cropped or lost into the paper.

COUPLE
A young couple seen from behind, arms linked and walking toward the landmark, with one looking upward. They occupy 14–18% of the poster height within the bottom 22–25%.

Mid-century travel coats, a small handbag, and compact suitcase. Use simple silhouettes with minimal strokes. No faces, fingers, detailed clothing folds, or extra figures.

LINE
Loose, broken, imperfect ink contours. Lines may skip, overshoot corners, vary in weight, or stop before connecting.

Background buildings remain highly gestural — simple rooflines, corners, and vertical suggestions. Never draw individual windows or bricks. Some forms should exist only as watercolor washes.

WATERCOLOR
Use irregular, transparent washes rather than solid fills. Show natural blooms, backruns, wet-in-wet bleeding, pooled pigment, dry-brush skips, dissolved edges, and subtle paper-grain granulation.

Washes may slightly overshoot or fall short of the ink. Keep overall coverage around 55–65%, leaving generous bare paper in the sky, distant city, sunlit surfa

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