Infographic PPTX Workflow 4-Step Minimal Poster

Educational infographic poster titled "PPTX Infographic Workflow" in landscape layout, designed as a simple 4-step technology/engineering explainer for a general audience; text labels must be sharp, high-contrast, and fully readable in clean sans-serif typography. Arrange four numbered panels from left to right with bold headings, one-line captions, and clear connecting arrows showing sequence flow; include small sequence numbers in solid black circles and thin dotted guide lines between panels. 

1. heading: "Plan Content", caption: "Define the message, audience, and key data points.", visual: a simplified document outline icon with stacked text bars, a small target symbol, and three bullet nodes connected by thin lines.
2. heading: "Build Layout", caption: "Place titles, icons, and charts into a clear slide structure.", visual: a wireframe slide rectangle divided into header, content blocks, and a sidebar, with alignment guides and placeholder boxes.
3. heading: "Add Visuals", caption: "Use simple diagrams, arrows, and charts to explain ideas quickly.", visual: a bar chart, pie chart, arrow connector set, and a small icon library grid, all rendered as clean vector symbols inside a slide frame.
4. heading: "Export PPTX", caption: "Finalize the presentation file for sharing and editing.", visual: a presentation file icon labeled by design only as a generic slide document, with an outward arrow to a monitor and cloud upload symbol, avoiding any real-brand logos.

Connect the four panels with bold horizontal arrows and subtle dotted progression lines; emphasize left-to-right workflow and numbered sequence. Add a small legend area with generic icons for "Text", "Chart", and "Flow" using simple monochrome symbols. Visual style: minimal corporate, monochrome black and white palette, crisp vector shapes, generous white space, balanced grid composition, calm professional mood, magazine-grade editorial illustration, vector-clean lines, no photographic textures. No identifiable people, no branded UI, no copyrighted characters, no watermarks. All text MUST be written in English (array). Every heading, label, caption, legend and metric name in the image must be in English — not English. Spell each English word correctly using English characters and diacritics. Numbers stay as digits, no watermarks Render labels and headings in clean English typography (sans-serif). No real-brand logos, no copyrighted characters, no people that could be identified, no graphic medical content. If the topic touches a regulated domain (medicine, finance, law), keep the explanation conceptual and add no specific dosages, prices or legal advice.