Vis Dataset Sankey Heatmap Trend Infographic

Data visualization infographic titled "Heatmap Example" using a SANKEY FLOW as the dominant visual element to show trend progression across stages and periods. Create a clean left-to-right pipeline with 5 sequential time stages labeled in English: "Period 1", "Period 2", "Period 3", "Period 4", "Period 5". Within each stage, show flow bands representing intensity categories translated into English labels: "Low", "Moderate", "High", "Very High". Make the widths of the flow bands change plausibly over time to indicate an upward trend in higher-intensity segments and a decline in lower-intensity segments. Include a subtle supporting mini heatmap strip beneath the Sankey as contextual texture only, with rows labeled "Segment A", "Segment B", "Segment C", "Segment D" and columns labeled "Period 1" to "Period 5", all in English, to reinforce the heatmap theme while keeping the Sankey dominant. Add sharp axis-style stage markers and clear tick marks for a bottom guide labeled "Time" with evenly spaced ticks from 1 to 5, all in English, with no misleading truncation or scale manipulation. Use realistic illustrative values: total flow 100 units in each period, with category distribution shifting from Period 1: Low 42, Moderate 33, High 18, Very High 7; Period 2: Low 36, Moderate 34, High 21, Very High 9; Period 3: Low 30, Moderate 33, High 25, Very High 12; Period 4: Low 24, Moderate 31, High 29, Very High 16; Period 5: Low 19, Moderate 28, High 32, Very High 21. Show these as neat labels on the flow nodes in English with the word "illustrative" where appropriate, for example "High: 32 (illustrative)". Add 4 key insight callouts with headline numbers, short interpretations in English, and small icons: "21%" with text "Very High rises from 7 to 21 illustrative" and an upward arrow icon; "-23" with text "Low falls from 42 to 19 illustrative" and a downward arrow icon; "53" with text "High + Very High reach 53 by Period 5 illustrative" and a signal/wave icon; "Period 3" with text "Midpoint where higher intensity begins to accelerate illustrative" and a pivot/turn icon. Include a compact legend in English for category colors: "Low", "Moderate", "High", "Very High". Add a small source / data-note strip at the bottom in English reading: "Data note: Illustrative example for visualization concept. Figures are illustrative and not sourced from an external dataset." Visual style: retro 1970s magazine charts, editorial blue & cream palette with deep navy, faded cobalt, dusty sky blue, warm cream background, subtle paper grain, restrained ink lines, vintage print feel, geometric annotation boxes, simple period icons, confident newsroom layout. Emphasize editorial data journalism illustration, FT / Bloomberg-grade chart aesthetics, vector-clean infographic layout. 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 fake authoritative sources cited, no watermarks Numbers labeled "illustrative" unless the user supplied specific sourced data. No fake authoritative sources cited (do not invent "Source: Reuters 2025" — use "Illustrative example" instead). No misleading axis truncation or scale manipulation.