Pie Chart Data Visualization with Gantt Project Trend Lines

Data visualization infographic titled "Gantt Chart Project" using a TREND LINE (over time) as the dominant visual element, reframing the project schedule story as progress trend over a 12-month timeline. Show a large central line chart with x-axis labeled in English with months "Jan, Feb, Mar, Apr, May, Jun, Jul, Aug, Sep, Oct, Nov, Dec" and y-axis labeled "Project completion (%)" from 0 to 100 with clear tick marks at 0, 20, 40, 60, 80, 100. Plot 4 clean trend lines for major workstreams: "Planning", "Design", "Development", "Testing" with realistic illustrative cumulative completion values, for example Planning rising early to 100 by Apr, Design reaching 100 by Jun, Development accelerating from Apr to Oct, Testing starting in Jul and reaching 100 by Dec. Add subtle milestone markers and a thin secondary band below the chart suggesting Gantt-like phases across the same timeline. Include a small English subtitle: "Illustrative project schedule and completion trend". Add 4 key insight callouts around the chart, each with a small icon and short English interpretation: 1) headline number "12 months" with calendar icon and text "Full illustrative project horizon"; 2) headline number "4 workstreams" with layers icon and text "Parallel phases overlap from spring onward"; 3) headline number "60%" with upward arrow icon and text "Development gains most rapidly in mid-year"; 4) headline number "Q4" with checkmark icon and text "Testing and final completion concentrate late in the year". Add a compact legend in English for the four lines. Add a bottom source/data-note strip in English reading "Data note: Illustrative example for visualization concept only. Figures are not sourced unless provided by the user." Use editorial data journalism illustration, FT / Bloomberg-grade chart aesthetics, vector-clean infographic layout. Visual style: NYT graphics desk, restrained, analytical, elegant, print-newsroom feel. Color palette: Economist warm beige background, charcoal typography, muted red, rust, slate blue, olive accents, soft gridlines, minimal decoration, high readability. Ensure sharp axis labels and tick marks, honest full-scale axes, no truncation, no scale manipulation. Incorporate subtle visual cues that nod to project planning while keeping the trend line chart dominant. 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.