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L13 · 沙漏流图

分阶段递减人数（漏斗）的 Lupi Editorial 真实参考实现。示例结论为“漏斗像沙一样倾泻”，副标题已经把图例、单位或时间口径写在图旁：每段宽度代表该阶段人数 · 丝线逐级向下流动 · 2026 年第二季度用户群

技术档案

项目 约定
数据形状 分阶段递减人数（漏斗）
场合 年报/故事页
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 HOURGLASS STREAM · MONO-EDITORIAL2 · GROWTH

实现与使用边界

  • 页面直接复用 gallery 中 “The funnel, poured” 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“分阶段递减人数（漏斗）”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 L13 Hourglass Stream，真实骨架取自 templates/lupi-gallery.html 的 “The funnel, poured” 卡片与对应渲染块。

l13-hourglass-stream.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 — L13 沙漏流图</title>
<link rel="stylesheet" href="../../../../vendor/fonts/fonts.css">
<style>
  :root{--bg:#F0EFEB;--dark:#1C1C1A;--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:1400px;margin:0 auto}
  .card{background:var(--bg);border-radius:24px;padding:28px 28px 20px}
  .card.dark{background:var(--dark);color:#F0EFEB}
  .card.dark .sub{color:#8F8E88}
  .card.dark .src{color:#55554F}
  .card.wide{grid-column:1/-1}
  .split{display:grid;grid-template-columns:250px 1fr;gap:30px;align-items:start}
  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}
  .note{font-size:11px;color:#6A6963;line-height:1.65;margin-bottom:16px}
  .legend{font-size:9px;letter-spacing:.1em;font-weight:600;color:var(--muted);line-height:2}
  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}}
  @media (prefers-reduced-motion:reduce){
    .pop,.fade{animation:none}
    .draw{animation:none;stroke-dasharray:none;stroke-dashoffset:0}
  }

  .pagehead{max-width:1400px;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}
  .pagehead .badge{margin:0 2px}
  .badge{display:inline-block;font-size:9px;font-weight:700;letter-spacing:.08em;
    padding:3px 10px;border-radius:99px;margin-bottom:10px}
  .badge.del{background:#1C1C1A;color:#F0EFEB}
  .badge.pick{border:1.5px solid #1C1C1A;color:#1C1C1A}
  .badge.pair{border:1px dashed #B0AFA9;color:#8F8E88}
  .card.dark .badge.del{background:#F0EFEB;color:#1C1C1A}
  .card.dark .badge.pick{border-color:#F0EFEB;color:#F0EFEB}
  .card.dark .badge.pair{border-color:#55554F;color:#8F8E88}

  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 编辑型 · L13</span>
    <h2>漏斗像沙一样倾泻</h2>
    <div class="sub">每段宽度代表该阶段人数 · 丝线逐级向下流动 · 2026 年第二季度用户群</div>
    <svg id="hourglass" viewBox="0 0 400 330" preserveAspectRatio="xMidYMid meet"></svg>
    <div class="src">HOURGLASS STREAM · MONO-EDITORIAL2 · GROWTH</div>
  </div>
</main>
<script>
// ── shared Mono tokens ──
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; // deterministic
const D2R=Math.PI/180;
const pol=(cx,cy,r,deg)=>[cx+r*Math.cos(deg*D2R),cy+r*Math.sin(deg*D2R)];
const sect=(cx,cy,r0,r1,a0,a1)=>{
  const big=a1-a0>180?1:0;
  const [xa,ya]=pol(cx,cy,r1,a0),[xb,yb]=pol(cx,cy,r1,a1);
  const [xc,yc]=pol(cx,cy,r0,a1),[xd,yd]=pol(cx,cy,r0,a0);
  return `M${xa} ${ya} A${r1} ${r1} 0 ${big} 1 ${xb} ${yb} L${xc} ${yc} A${r0} ${r0} 0 ${big} 0 ${xd} ${yd} Z`;
};
// unified reveal: draw when scrolled into view; click replays
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);
};

// ════ 9 · hourglass stream ════
(()=>{
const STAGE=[['VISITORS',4200],['SIGN-UPS',1900],['ACTIVATED',960],['RETAINED',540],['PAYING',310]];
obsReveal('hourglass',s=>{
  const CXm=185,sy=k=>34+k*64,w=c=>c/4200*290;
  STAGE.forEach(([name,c],k)=>{
    const y=sy(k),hw=w(c)/2;
    // barcode strip: one tick ≈ 40 people
    const n=Math.round(c/40);
    for(let t=0;t<n;t++){
      const x=CXm-hw+(t+.5)/n*hw*2+(rnd(t+1,k+3)-.5)*3;
      el(s,'line',{x1:x,y1:y-6,x2:x,y2:y+6,stroke:INK,'stroke-width':.8,
        opacity:.45+rnd(t+2,k+5)*.5,class:'fade',style:`animation-delay:${k*.12+t*.004}s`});
    }
    // threads trickling to the next strip
    if(k<4){
      const hw1=w(STAGE[k+1][1])/2;
      for(let t=0;t<34;t++){
        const xt=CXm+(rnd(t+1,k*7+1)-.5)*2*hw*.94;
        const xb=CXm+(rnd(t+3,k*7+5)-.5)*2*hw1*.94;
        el(s,'path',{d:`M${xt} ${y+8} C${xt} ${y+34} ${xb} ${sy(k+1)-34} ${xb} ${sy(k+1)-8}`,
          fill:'none',stroke:'#B0AFA9','stroke-width':.5,opacity:.32,pathLength:1,
          class:'draw',style:`animation-delay:${.2+k*.15+t*.008}s;animation-duration:.8s`});
      }
      // conversion between stages, parked in the left margin
      const pct=Math.round(STAGE[k+1][1]/c*100);
      txt(s,{x:26,y:(y+sy(k+1))/2+3,'font-size':8.5,'font-weight':800,fill:'#8F8E88',
        class:'fade',style:`animation-delay:${.5+k*.15}s`},pct+'%');
      txt(s,{x:26,y:(y+sy(k+1))/2+13,'font-size':6,'font-weight':600,fill:'#C6C5BF',
        'letter-spacing':'.08em',class:'fade',style:`animation-delay:${.5+k*.15}s`},'GET THROUGH');
    }
    // stage label, tied to the strip edge
    el(s,'line',{x1:CXm+hw+6,y1:y,x2:340,y2:y,stroke:'#DEDDD6','stroke-width':.8,
      class:'fade',style:`animation-delay:${.3+k*.12}s`});
    txt(s,{x:344,y:y-1,'font-size':7.5,'font-weight':700,fill:'#4A4944',
      'letter-spacing':'.08em',class:'fade',style:`animation-delay:${.35+k*.12}s`},name);
    txt(s,{x:344,y:y+10,'font-size':9.5,'font-weight':800,fill:INK,
      class:'fade',style:`animation-delay:${.4+k*.12}s`},c.toLocaleString());
  });
});
})();
</script>
</body>
</html>