F8 · 铅垂散点图
二维散点（≤20 点）的 Lupi Basics 真实参考实现。示例结论为“十二款产品，价格与满意度”，副标题已经把图例、单位或时间口径写在图旁：每个圆点垂下一根铅垂线 · 横向位置读价格，纵向高度读满意度
技术档案
| 项目 | 约定 |
|---|---|
| 数据形状 | 二维散点（≤20 点） |
| 场合 | 产品分析 |
| 读者时间 | ~30s |
| 渲染引擎 | SVG |
| 交互与动效 | 滚入视野播放，点击图表重播；数据点带浏览器原生提示 |
| 示例来源行 | PLUMB SCATTER · MONO-BASIC · PRODUCT PANEL |
实现与使用边界
- 页面直接复用 gallery 中 “Price against satisfaction” 的卡片结构和同名渲染块，没有按截图重新绘制。
- 标题、副标题、图形、来源行四件套保持原样；数据编码、比例关系、灰阶和动画节奏由原实现决定。
- 使用时只替换数据与文案，并保持“二维散点（≤20 点）”这一数据契约；若数据本体改变，应回到总目录重新选型。
- 颜色限于 Mono 灰阶，面积编码继续使用平方根换算；柱长、位置与角度编码不得断轴或视觉夸大。
模板来源：Lieflat Charts
F8 Plumb Scatter，真实骨架取自templates/basics-gallery.html的 “Price against satisfaction” 卡片与对应渲染块。
f8-plumb-scatter.html —— 自包含单页源码
<!doctype html>
<html lang="zh-CN">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width,initial-scale=1" />
<title>Lieflat Charts — F8 铅垂散点图</title>
<link rel="stylesheet" href="../../../../vendor/fonts/fonts.css">
<style>
:root{--bg:#F0EFEB;--ink:#1C1C1A;--muted:#8F8E88;--faint:#C6C5BF;--grid:#DEDDD6}
*{margin:0;padding:0;box-sizing:border-box}
body{background:var(--bg);font-family:'Inter',sans-serif;color:var(--ink);padding:40px;-webkit-font-smoothing:antialiased}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:1100px;margin:0 auto}
.card{background:var(--bg);border-radius:24px;padding:28px 28px 20px}
h2{font-weight:700;font-size:16.5px;letter-spacing:-.02em;margin-bottom:3px}
.sub{font-size:11.5px;color:var(--muted);margin-bottom:14px}
.src{font-size:9.5px;color:var(--faint);margin-top:10px;letter-spacing:.08em;font-weight:500}
.badge{display:inline-block;font-size:9px;font-weight:700;letter-spacing:.08em;
padding:3px 10px;border-radius:99px;margin-bottom:10px;border:1px dashed #B0AFA9;color:#8F8E88}
svg{width:100%;max-height:330px;display:block;margin:0 auto}
svg text{font-family:'Inter',sans-serif}
.pop{transform-box:fill-box;transform-origin:center;animation:pop .5s cubic-bezier(.2,.7,.3,1.3) both}
@keyframes pop{from{transform:scale(0)}to{transform:none}}
.fade{animation:fade .9s ease both}
@keyframes fade{from{opacity:0}}
.draw{stroke-dasharray:1;stroke-dashoffset:1;animation:draw 1s cubic-bezier(.4,0,.2,1) both}
@keyframes draw{to{stroke-dashoffset:0}}
.pagehead{max-width:1100px;margin:0 auto 26px;padding:0 4px}
.pagehead h1{font-size:22px;letter-spacing:-.02em;font-weight:800}
.pagehead p{font-size:12px;color:#8F8E88;margin-top:5px;line-height:1.7}
html,body{min-height:100%;margin:0}
body{display:grid;place-items:center;padding:28px}
.pagehead{display:none}
.grid2{display:block;width:min(100%,920px);max-width:920px;margin:0 auto}
.card,.card.wide{display:block;width:100%;min-height:520px;padding:38px 42px 24px}
.card .split{grid-template-columns:minmax(190px,250px) 1fr}
.wiki-code{display:inline-block;margin-bottom:12px;padding:4px 11px;border:1px dashed #B0AFA9;border-radius:99px;color:#8F8E88;font-size:10px;font-weight:700;letter-spacing:.08em}
.card.dark .wiki-code{border-color:#55554F}
@media(max-width:620px){
body{padding:10px}
.card,.card.wide{min-height:500px;padding:26px 18px 20px}
.card .split{display:block}
.card .note,.card .legend{display:none}
}
</style>
</head>
<body>
<main class="grid2">
<div class="card">
<span class="wiki-code">LUPI 基础型 · F8</span>
<span class="badge">LUPI 基础型 · 散点</span>
<h2>十二款产品，价格与满意度</h2>
<div class="sub">每个圆点垂下一根铅垂线 · 横向位置读价格，纵向高度读满意度</div>
<svg id="plumb" viewBox="0 0 400 320" preserveAspectRatio="xMidYMid meet"></svg>
<div class="src">PLUMB SCATTER · MONO-BASIC · PRODUCT PANEL</div>
</div>
</main>
<script>
// ── shared Mono tokens（与 lupi-gallery 同源） ──
const INK='#1C1C1A',PAPER='#F0EFEB',MUTED='#8F8E88',GRID='#DEDDD6';
const NS='http://www.w3.org/2000/svg';
const el=(p,t,a)=>{const n=document.createElementNS(NS,t);for(const k in a)n.setAttribute(k,a[k]);p.appendChild(n);return n};
const txt=(p,a,s)=>{const n=el(p,'text',a);n.textContent=s;return n};
const tip=(n,s)=>{const t=document.createElementNS(NS,'title');t.textContent=s;n.appendChild(t)};
const rnd=(i,k)=>Math.abs(((i*73856093)^(k*19349663))%1000)/1000;
const D2R=Math.PI/180;
const pol=(cx,cy,r,deg)=>[cx+r*Math.cos(deg*D2R),cy+r*Math.sin(deg*D2R)];
const obsReveal=(id,fn)=>{
const n=document.getElementById(id);
const go=()=>{n.innerHTML='';fn(n)};
const io=new IntersectionObserver(es=>{if(es[0].isIntersecting){go();io.disconnect()}},{threshold:.3});
io.observe(n);
n.style.cursor='pointer';
n.addEventListener('click',go);
};
// ════ C4 · plumb scatter ════
// 散点：每个点垂一根发丝铅垂线到地板，x 读线脚、y 读高度。
// 地板是 barcode 刻度。最好/最差两个点标名。
(()=>{
const P=[['Editor',72,86],['Boards',58,74],['Docs',44,79],['Chat',38,62],['Flows',66,58],
['Vault',82,71],['Pages',28,55],['Sync',52,49],['Grid',88,44],['Views',20,68],
['Hub',76,32],['Forms',34,38]];
obsReveal('plumb',s=>{
const X0=48,X1=368,base=258,mapX=p=>X0+p/100*(X1-X0),mapY=v=>base-(v-20)*2.6;
// barcode floor
for(let g=0;g<=20;g++){
const x=X0+g/20*(X1-X0);
el(s,'line',{x1:x,y1:base,x2:x,y2:base-(g%5===0?7:4),stroke:'#CFCEC7','stroke-width':.6,
class:'fade',style:`animation-delay:${g*.01}s`});
}
el(s,'line',{x1:X0-6,y1:base,x2:X1+6,y2:base,stroke:GRID,'stroke-width':.8,class:'fade'});
txt(s,{x:X0,y:base+16,'font-size':7,'font-weight':600,fill:'#C6C5BF',class:'fade'},'CHEAP');
txt(s,{x:X1,y:base+16,'font-size':7,'font-weight':600,fill:'#C6C5BF','text-anchor':'end',
class:'fade'},'PREMIUM');
const best=P.reduce((a,b)=>b[2]>a[2]?b:a),worst=P.reduce((a,b)=>b[2]<a[2]?b:a);
P.forEach(([name,px,sat],i)=>{
const x=mapX(px),y=mapY(sat),hero=name===best[0]||name===worst[0];
el(s,'line',{x1:x,y1:base,x2:x,y2:y,stroke:'#B0AFA9','stroke-width':.55,
opacity:.6,class:'fade',style:`animation-delay:${.2+i*.05}s`});
const dot=el(s,'circle',{cx:x,cy:y,r:hero?4.6:2.6,fill:hero?INK:'#55554F',
class:'pop',style:`animation-delay:${.25+i*.05}s`});
tip(dot,`${name} — price ${px} · satisfaction ${sat}`);
if(hero)txt(s,{x,y:y-10,'font-size':8.5,'font-weight':800,fill:INK,'text-anchor':'middle',
style:`paint-order:stroke;stroke:${PAPER};stroke-width:3px;animation-delay:${.8}s`,
class:'fade'},`${name} · ${sat}`);
});
txt(s,{x:26,y:mapY(85),'font-size':7,'font-weight':600,fill:'#C6C5BF',
transform:`rotate(-90 26 ${mapY(85)})`,'text-anchor':'end','letter-spacing':'.08em',class:'fade'},'HAPPIER ↑');
txt(s,{x:200,y:306,'font-size':7,'font-weight':600,fill:'#B0AFA9','text-anchor':'middle',
'letter-spacing':'.12em',class:'fade',style:'animation-delay:1s'},
'EVERY DOT HANGS A PLUMB LINE · READ X AT THE FLOOR');
});
})();
</script>
</body>
</html>