huashu-pentagram-grid

name	huashu-pentagram-grid
description	Pentagram Info-Architecture (信息建筑·红) — rational Swiss-grid data decks adapted from the ppt-pentagram showcase of 花叔 (alchaincyf)'s huashu-design. Black-and-white restraint on a 1920×1080 canvas, Helvetica Neue hierarchy, one red (#E63946), 64px black chrome bars, 5%-opacity grid hairlines, giant 900-weight numerals anchoring red/dark/grey comparison bar charts. Use when the user wants a data report, benchmark deck, annual report, KPI review, 数据报告, 基准对比, or a Swiss-grid / Pentagram-style presentation.
triggers	["pentagram","swiss grid","data report deck","benchmark deck","信息建筑","数据报告 PPT","瑞士网格","红黑白幻灯片"]
od	{"mode":"deck","surface":"web","preview":{"type":"html","entry":"index.html"},"design_system":{"requires":false},"example_prompt":"Use the Pentagram Info-Architecture template to turn my data story into a Swiss-grid HTML deck: 1920×1080 fixed canvas, black 64px chrome bars top and bottom, Helvetica Neue hierarchy, a single #E63946 red accent, giant 900-weight hero numerals, and red/dark/grey comparison bar charts. Start from example.html, replace the content only, and keep the design system intact.","example_prompt_i18n":{"zh-CN":"用「信息建筑·红」模板把我的数据故事做成瑞士网格 HTML 幻灯片：1920×1080 固定画布、上下 64px 黑色信息条、Helvetica Neue 强层级、唯一红色 #E63946、巨型 900 字重数字锚点、红/黑/灰三色对比条形图。从 example.html 出发只换内容，不要重写设计。"}}

Pentagram Info-Architecture · 信息建筑·红

Produce a single-file, Swiss-grid data deck. You are an information architect working in HTML: every page is a measured grid, every number has a coordinate, and red appears exactly where the eye must land. The visual system, canvas contract, and navigation runtime are locked by example.html. Start from example.html, replace content only — do not rewrite the design or the script. Do not introduce any color or font outside this spec.

Adapted from the ppt-pentagram showcase of huashu-design by 花叔 (alchaincyf), MIT licensed. The upstream file is a single data page; this plugin extends it into a full multi-section deck while preserving its DNA.

Hard spec (locked — violating any line is a regression)

Canvas & runtime

• One <div id="stage"> fixed at 1920 × 1080 px, centered with position: fixed; top: 50%; left: 50%; a fit() function applies translate(-50%, -50%) scale(min(innerWidth/1920, innerHeight/1080)) on load and resize. All inner layout in px — the scaler owns responsiveness.
• Each page is one <section class="slide"> inside #stage with a data-screen-label="01 封面"-style label; exactly one slide carries .active; dark pages add .dark.
• Navigation (keep the script verbatim): ←/↑/PageUp previous, →/↓/Space/PageDown next, Home/End first/last; #/N hash routing (1-indexed) read on load + hashchange, written via history.replaceState; click left third = back, rest = forward; fixed counter pill bottom-right, key-hint bottom-left. No external JS, no build step — the file must open inside a sandboxed iframe via file://.

Design tokens (:root — keep the names, re-theme values only)

Token	Value	Role
--paper	#FFFFFF	light page background
--night	#111111	dark pages + chrome bars
--ink	#111111	primary text on light
--night-ink	#FFFFFF	primary text on dark
--accent	#E63946	the only red — the only accent
--grid	#E8E8E8	hairline rules / column rules
--track	#F5F5F5	bar-chart track
--bar-base	#E0E0E0	losing / baseline bar
--muted	#999999	secondary labels
--muted-2	#666666	body copy on light
--faint	#BBBBBB	tertiary captions
--night-line	#333333	hairlines on dark pages
--night-mut	#888888	secondary text on dark
--sans	'Helvetica Neue', 'Helvetica', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', Arial, sans-serif	the only family

Zero external dependencies: no Google Fonts, no @import, no CDN. One font stack, one accent. A second accent color is the cardinal sin of this style.

Signature devices (the visual DNA — every deck must show them)

1. 64px black chrome bars top and bottom of every light page: top bar = uppercase 12px/700/3px-tracking label left (with a red / separator) + red uppercase label right; bottom bar = 900-weight logotype + 1px #444 vertical divider + grey footnote left, red uppercase label right. Dark pages swap solid bars for 1px --night-line hairline strips with the same text.
2. Grid hairlines: absolutely-positioned 1px verticals (top:64px; bottom:64px) and horizontals (left/right:80px) at opacity: 0.05 black (0.08 white on dark). 80px outer margins are the master gutter; columns land on them.
3. Giant numeral anchor: one 180–260px, weight-900, negative-tracked (≈ −1px per 20px of size) number per hero page; its decimal point, slash, or unit glyph is red (<span class="decimal"> / .red). Hero numerals on dark divider pages may be fully red.
4. Red/dark/grey bar charts: .bar-row = right-aligned 90px label + --track track + fill (winner red / dark black / base grey) with the value printed inside, right-aligned, white (grey on base). The subject of the page is always the red bar. Optional .delta red uppercase annotation underneath.
5. Summary strip: border-top: 1px solid var(--grid) row of .summary-items — 32px/900 number with one red glyph + 11px uppercase spaced caption.
6. Outlined red badge (.open-badge): 2px red border, red uppercase 11px text, optional inline-SVG dot glyph. Square corners — this style has zero border-radius anywhere except the runtime counter pill.

Layout enumeration (use 5+ per deck, never one layout everywhere)

Layout	Role
cover	giant statement headline (red full stop) + right-column hero numeral
contents	numbered red-kicker rows separated by --grid hairlines
big-number	one 260px numeral protagonist + side stat rail
data-theater	left hero column + 2–3 .bench-col bar-chart columns + summary strip (the upstream master)
divider	dark page, 260px red chapter number + oversized title
two-column	before/after comparison: grey bars left, red bars right
timeline	equal columns, 96px year numerals graded grey→black→red
quote	whitespace + red SVG quote marks + 54px/900 quote, key phrase red
stats-grid	2×2 grid of 128px numerals with red glyph accents
closing	dark page, giant CTA with red punctuation + key-hint capsule

Typography & scale (read from 10 meters)

• Headlines 64–120px weight 900, tracking −2 to −5px. Hero numerals 180–260px weight 900. Body 15–18px, --muted-2, line-height 1.7, emphasized spans in --ink 700.
• Labels: 11–13px, weight 700, letter-spacing: 2–3px, text-transform: uppercase — this is the connective tissue of the style.
• Chinese copy uses 「」 quotes and full-width punctuation; red is applied to single punctuation glyphs (。 ， /) inside headlines, never whole headings.

Rhythm & discipline

• Default 10 pages (8–11 allowed). White pages dominate; at most 2–3 dark pages (divider + closing, optionally one dark hero) — this is a white style with black bookends, not a dark theme.
• Red budget: ≤ 4 red touches per page (bars count as one device). If everything is red, nothing is.
• No emoji, no icon fonts, no decorative illustrations, no gradients, no shadows, no rounded corners. Flat ink on paper. Icons, if truly needed, are minimal inline SVG strokes.
• Real content only — the user's actual numbers; missing data gets an honest <!-- 待用户提供 --> placeholder, never invented statistics. (The seed deck's "析衡" data is fictional demo content and must be fully replaced.)

Workflow

1. Clarify once: topic, audience, page count, and which 2–4 numbers are the protagonists. This style lives and dies by its hero numerals — pick them before writing any page.
2. Copy example.html, retitle, then replace each section's content following the layout enumeration. Keep chrome bars, grid hairlines, token names, and the script intact. Re-theme by changing token values only — and only if the user's brand genuinely demands it; the red/black/white triad is the identity.
3. For ≥ 5 pages, showcase first: build the cover + one data-theater page, confirm the grammar, then batch the rest.
4. Self-check before delivery: arrow through every page; counter and #/N hash stay in sync; no overflow beyond 1920×1080; bar widths match their printed values proportionally; every page shows the chrome bars and at least one grid hairline; red count per page ≤ 4; no leftover demo ("析衡"/"XIHENG") text; grep for TODO.