Narrative Sparkline.

Duarte-style narrative sparkline decks: one oscillating SVG bézier waveform spanning the full 1920×1080 canvas, brand-orange (#FF6B2C) turning-point annotations, greyed ghost comparison lines, stroke-dashoffset progressive reveal, mono hairline chrome, Inter + Geist Mono. Built for change narratives, before/after contrasts, and data story arcs. Based on https://github.com/alchaincyf/huashu-design narrative-sparkline (references/design-styles.md · 中性派 · Sparkline叙事波形), generated from spec into a full multi-section deck.