Create a 16:9 horizontal literary editorial infographic poster from the input content.

Source text: {{source_text}}
Mood hint: {{theme_hint}}

First understand the season, imagery, emotion, cultural context, and visual focus of the source text, then translate it into an editorial poster that combines art illustration with infographic-style typography. The image is not a normal illustration, not a quote card, not a page full of chaotic text, and not an evenly split left-right layout. It should feel like a premium literary magazine spread, art exhibition poster, or poetic knowledge infographic.

Overall composition: the large illustration is the main visual and should occupy most of the canvas, extending full-bleed across the center, right side, upper area, and distance when appropriate. Keep a clear text information area on the left. Illustration and typography should interlock naturally, but the illustration must not swallow the text and the text must not collapse into one clump. The image must be horizontal 16:9, open, bright, airy, and breathable.

The left-side text must be arranged into three distinct hierarchy zones and remain left-aligned:
1. Top-left information cluster: include a small eyebrow, year or issue number, English subtitle, and Chinese main title or subtitle. Use varied sizes, clear spacing, and enough white space to create the upper visual starting point.
2. Middle-left auxiliary reading area: place 4 to 6 small information groups, such as keywords, short paragraphs, marginal notes, tiny explanations, poetic knowledge points, or observation hints. They should be staggered with varied density and varied length, like a real infographic poster reading area, not identical stacked text blocks.
3. Bottom-left closing area: add one Chinese short sentence, poetic summary, or invitation line, plus a small English note or tiny annotation as the lower landing point. It must be clearly separated from the top and middle zones.

Generate the text content naturally from the source text: extract imagery, season, emotion, keywords, reading hints, and a poetic summary. Important text should try to preserve the core imagery from the input accurately. Do not invent unrelated allusions, authors, dates, or facts. Use Chinese as the main display language with a small amount of English subtitle or micro-copy. If the image model cannot render every character perfectly, prioritize making the text area look like intentionally designed infographic typography that can be replaced later.

Visual style: flat illustration, impressionist and post-impressionist brush feeling, simple abstract lines, soft focus, airy atmosphere, bokeh brush marks, translucent layering, and bright colors. Let the palette grow naturally from the input theme. It should feel refined, soft, clear, breathable, and luminous; vivid is fine, but never dirty or chaotic. For gentle floral themes, soft pink, pale violet, misty purple, tender green, water blue, or morning gold may appear, but do not lock every topic into a pink-purple formula.

Illustration content should derive from the source text: let the most important natural object, figure, object, city, landscape, light, or abstract imagery become the main visual subject. The illustration is not corner decoration; it is the aesthetic core of the whole poster. The text is a left-side infographic reading structure. The final result should attract viewers through the image first, then impress them with the layered left-side layout, and finally invite them to stop and read.

Avoid: evenly split left-right layout, giant centered text over an image, ordinary travel poster, cheap PPT infographic, random gibberish covering the page, all text squeezed into one box, a single text column, overly cartoonish style, heavy dark palette, plastic 3D, low clarity, watermark, logo, generic border-template look, tiny main subject, or illustration only used as a corner accent.