<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<title>Huashu-Design · Infographic Demo</title>
<script crossorigin src="https://unpkg.com/react@18.3.1/umd/react.production.min.js"></script>
<script crossorigin src="https://unpkg.com/react-dom@18.3.1/umd/react-dom.production.min.js"></script>
<script src="https://unpkg.com/@babel/standalone@7.25.6/babel.min.js"></script>
<link rel="preconnect" href="https://fonts.googleapis.com">
<link rel="preconnect" href="https://fonts.gstatic.com" crossorigin>
<link href="https://fonts.googleapis.com/css2?family=Newsreader:ital,opsz,wght@0,6..72,300;0,6..72,400;0,6..72,500;0,6..72,600;0,6..72,700;1,6..72,300;1,6..72,400;1,6..72,500&family=Noto+Serif+SC:wght@300;400;500;600;700&family=Inter:wght@400;500;600&family=JetBrains+Mono:wght@400;500&display=swap" rel="stylesheet">
<style>
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html, body { width: 100%; height: 100%; overflow: hidden; }
  body {
    background: #0c0c0c;
    font-family: 'Newsreader', 'Noto Serif SC', Georgia, serif;
    color: #1a1a1a;
    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;
  }
</style>
</head>
<body>
<div id="root"></div>

<!-- animations.jsx inlined -->
<script type="text/babel">
(function() {
  const { createContext, useContext, useState, useEffect, useRef } = React;
  const TimeContext = createContext({ time: 0, duration: 10, playing: false });
  const SpriteContext = createContext(null);
  const Easing = {
    linear: t => t,
    easeIn: t => t * t,
    easeOut: t => 1 - (1 - t) * (1 - t),
    easeInOut: t => t < 0.5 ? 2 * t * t : 1 - Math.pow(-2 * t + 2, 2) / 2,
    spring: t => {
      const c = (2 * Math.PI) / 3;
      return t === 0 ? 0 : t === 1 ? 1 : Math.pow(2, -10 * t) * Math.sin((t * 10 - 0.75) * c) + 1;
    },
  };
  function interpolate(t, input, output, easing) {
    const [a, b] = input, [x, y] = output;
    if (t <= a) return x; if (t >= b) return y;
    let p = (t - a) / (b - a); if (easing) p = easing(p);
    return x + (y - x) * p;
  }
  function useTime() { return useContext(TimeContext).time; }
  function useSprite() { return useContext(SpriteContext) || { t: 0, elapsed: 0, duration: 0 }; }
  function Stage({ duration = 10, width = 1920, height = 1080, loop = true, children, bgColor = '#fff' }) {
    const [time, setTime] = useState(0);
    const [playing, setPlaying] = useState(true);
    const [scale, setScale] = useState(1);
    const rafRef = useRef(null);
    const effectiveLoop = (typeof window !== 'undefined' && window.__recording) ? false : loop;
    useEffect(() => {
      const update = () => {
        const s = Math.min(window.innerWidth / width, (window.innerHeight - 56) / height);
        setScale(s);
      };
      update(); window.addEventListener('resize', update);
      return () => window.removeEventListener('resize', update);
    }, [width, height]);
    useEffect(() => {
      if (!playing) return;
      let cancelled = false, last = null;
      function tick(now) {
        if (cancelled) return;
        if (last === null) { last = now; if (typeof window !== 'undefined') window.__ready = true; }
        const delta = (now - last) / 1000; last = now;
        setTime(prev => {
          const next = prev + delta;
          if (next >= duration) return effectiveLoop ? 0 : duration - 0.001;
          return next;
        });
        rafRef.current = requestAnimationFrame(tick);
      }
      const start = () => { if (!cancelled) rafRef.current = requestAnimationFrame(tick); };
      if (document.fonts && document.fonts.ready) document.fonts.ready.then(start); else start();
      return () => { cancelled = true; cancelAnimationFrame(rafRef.current); };
    }, [playing, duration, effectiveLoop]);
    const progress = time / duration;
    const ctx = { time, duration, playing, setPlaying, setTime };
    return (
      <TimeContext.Provider value={ctx}>
        <div style={{position:'fixed', inset:0, background:'#0c0c0c', display:'flex', flexDirection:'column'}}>
          <div style={{flex:1, position:'relative', overflow:'hidden'}}>
            <div style={{position:'absolute', top:'50%', left:'50%', transformOrigin:'center center', width, height, background: bgColor, overflow:'hidden', transform:`translate(-50%, -50%) scale(${scale})`}}>
              {children}
            </div>
          </div>
          <div className="no-record" style={{position:'fixed', bottom:0, left:0, right:0, background:'rgba(0,0,0,0.8)', padding:'12px 20px', display:'flex', alignItems:'center', gap:16, color:'#fff', fontSize:12, zIndex:100}}>
            <button onClick={()=>setPlaying(p=>!p)} style={{background:'none', border:'1px solid rgba(255,255,255,0.3)', color:'#fff', padding:'6px 14px', borderRadius:4, cursor:'pointer', fontSize:12}}>{playing?'⏸ 暂停':'▶ 播放'}</button>
            <button onClick={()=>setTime(0)} style={{background:'none', border:'1px solid rgba(255,255,255,0.3)', color:'#fff', padding:'6px 14px', borderRadius:4, cursor:'pointer', fontSize:12}}>⏮ 开始</button>
            <div style={{fontFamily:'ui-monospace, monospace', fontVariantNumeric:'tabular-nums', minWidth:90}}>{time.toFixed(2)}s / {duration.toFixed(2)}s</div>
            <div style={{flex:1, height:4, background:'rgba(255,255,255,0.2)', borderRadius:2, position:'relative'}}>
              <div style={{position:'absolute', top:0, left:0, height:'100%', width:`${progress*100}%`, background:'#fff', borderRadius:2}} />
            </div>
          </div>
        </div>
      </TimeContext.Provider>
    );
  }
  function Sprite({ start = 0, end, children, style }) {
    const { time } = useContext(TimeContext);
    const actualEnd = end == null ? Infinity : end;
    if (time < start || time >= actualEnd) return null;
    const duration = actualEnd - start;
    const elapsed = time - start;
    const t = duration === 0 ? 1 : Math.max(0, Math.min(1, elapsed / duration));
    return (
      <SpriteContext.Provider value={{ t, elapsed, duration, start, end: actualEnd }}>
        <div style={{position:'absolute', inset:0, ...style}}>{children}</div>
      </SpriteContext.Provider>
    );
  }
  window.Animations = { Stage, Sprite, useTime, useSprite, Easing, interpolate };
})();
</script>

<!-- Demo scene -->
<script type="text/babel">
const { Stage, Sprite, useTime, useSprite, Easing, interpolate } = window.Animations;

// ── Design tokens ─────────────────────────────────────────
const CREAM = '#FAF6EF';
const INK = '#1a1a1a';
const TERRA = '#C04A1A';
const ASH = '#6b6b6b';
const LINE = '#d9d2c5';
const OLIVE = '#6a6b4e';
const DEEP_BLUE = '#2a3552';

const serif = "'Newsreader', 'Noto Serif SC', Georgia, serif";
const sans = "'Inter', -apple-system, sans-serif";
const mono = "'JetBrains Mono', ui-monospace, monospace";

// ── Scene 1: Title (0 – 3s) ───────────────────────────────
function Scene1_Title() {
  const { elapsed } = useSprite();
  const topOp = interpolate(elapsed, [0.0, 0.6], [0, 1]);
  const topLineW = interpolate(elapsed, [0.3, 1.0], [0, 220]);
  const mainOp = interpolate(elapsed, [0.5, 1.2], [0, 1]);
  const mainY = interpolate(elapsed, [0.5, 1.3], [32, 0], Easing.easeOut);
  const italicOp = interpolate(elapsed, [1.0, 1.6], [0, 1]);
  const subOp = interpolate(elapsed, [1.5, 2.1], [0, 1]);
  const fadeOut = interpolate(elapsed, [2.6, 3.0], [1, 0], Easing.easeIn);

  return (
    <div style={{position:'absolute', inset:0, background: CREAM, opacity: fadeOut,
      display:'flex', alignItems:'center', justifyContent:'center', flexDirection:'column'}}>
      <div style={{display:'flex', alignItems:'center', gap: 18, opacity: topOp, marginBottom: 48}}>
        <div style={{height: 1, background: TERRA, width: topLineW}}/>
        <div style={{fontFamily: mono, fontSize: 12, color: TERRA,
          letterSpacing:'0.35em'}}>
          信息图 · 数据驱动 · 印刷级
        </div>
        <div style={{height: 1, background: TERRA, width: topLineW}}/>
      </div>
      <div style={{fontFamily: serif, fontSize: 160, fontWeight: 500,
        color: INK, lineHeight: 1, letterSpacing: '-0.02em',
        opacity: mainOp, transform: `translateY(${mainY}px)`}}>
        让数据<span style={{fontStyle:'italic', color: TERRA, opacity: italicOp}}>说话</span>
      </div>
      <div style={{fontFamily: serif, fontStyle: 'italic', fontSize: 24,
        color: ASH, marginTop: 44, opacity: subOp, letterSpacing: '0.02em'}}>
        精确排版 · 一眼看懂 · 可印刷
      </div>
    </div>
  );
}

// ── Scene 2: Full infographic layout (3 – 10s) ────────────
// Uses a magazine spread style: headline, three columns (big numbers / bars / pie), trend line footer
function Scene2_Spread() {
  const { elapsed } = useSprite();
  const headerOp = interpolate(elapsed, [0, 0.5], [0, 1]);
  const ruleW = interpolate(elapsed, [0.3, 1.0], [0, 1800]);
  const colDelay = [0.6, 1.0, 1.4];

  return (
    <div style={{position:'absolute', inset:0, background: CREAM,
      padding: '60px 80px 50px', display:'flex', flexDirection:'column'}}>
      {/* Masthead */}
      <div style={{opacity: headerOp, display:'flex', justifyContent:'space-between',
        alignItems:'baseline', marginBottom: 14, fontFamily: mono, fontSize: 11,
        letterSpacing: '0.3em', color: ASH}}>
        <span>HUASHU · INFOGRAPHIC REPORT</span>
        <span>VOL. 01 · 2026.04</span>
      </div>
      {/* Headline */}
      <div style={{opacity: headerOp, fontFamily: serif, fontSize: 72,
        fontWeight: 500, color: INK, lineHeight: 1.05, letterSpacing: '-0.01em',
        marginBottom: 8}}>
        2026 AI 写作工具
        <span style={{fontStyle:'italic', color: TERRA, marginLeft: 20}}>年度观察</span>
      </div>
      <div style={{opacity: headerOp, fontFamily: serif, fontStyle:'italic',
        fontSize: 20, color: ASH, marginBottom: 22}}>
        156 位创作者匿名问卷 · 3 月 15 日 – 4 月 10 日
      </div>
      {/* Top rule */}
      <div style={{width: ruleW, height: 1, background: INK, marginBottom: 28}}/>

      {/* Three-column grid */}
      <div style={{display:'grid', gridTemplateColumns:'1fr 1px 1.15fr 1px 0.95fr',
        gap: 36, flex: 1}}>
        <ColumnLeft elapsed={elapsed - colDelay[0]} />
        <div style={{background: LINE}}/>
        <ColumnMid elapsed={elapsed - colDelay[1]} />
        <div style={{background: LINE}}/>
        <ColumnRight elapsed={elapsed - colDelay[2]} />
      </div>

      {/* Footer trend line */}
      <FooterTrend elapsed={elapsed - 3.5} />
    </div>
  );
}

function ColumnLeft({ elapsed }) {
  const e = Math.max(0, elapsed);
  const labelOp = interpolate(e, [0, 0.4], [0, 1]);
  // 87%
  const n1 = Math.round(interpolate(e, [0.3, 1.8], [0, 87], Easing.easeOut));
  const bar1 = interpolate(e, [0.3, 1.8], [0, 87], Easing.easeOut);
  // 3.2x
  const n2 = interpolate(e, [1.3, 2.8], [1.0, 3.2], Easing.easeOut);
  const bar2 = interpolate(e, [1.3, 2.8], [0, 3.2/5*100], Easing.easeOut);
  // 156
  const n3 = Math.round(interpolate(e, [2.3, 3.6], [0, 156], Easing.easeOut));
  const bar3 = interpolate(e, [2.3, 3.6], [0, 100], Easing.easeOut);

  return (
    <div style={{display:'flex', flexDirection:'column', gap: 30}}>
      <div style={{fontFamily: mono, fontSize: 10, letterSpacing:'0.3em',
        color: TERRA, opacity: labelOp}}>
        COLUMN / 01 · 核心指标
      </div>
      <MetricRow
        value={`${n1}%`}
        width={`${bar1}%`}
        label="用户每周使用 AI 辅助写作"
        note="¹ 每周 ≥ 3 次"
        color={TERRA}
      />
      <MetricRow
        value={`${n2.toFixed(1)}×`}
        width={`${bar2}%`}
        label="平均产出效率提升"
        note="² 自述周稿字数"
        color={OLIVE}
      />
      <MetricRow
        value={String(n3)}
        width={`${bar3}%`}
        label="有效样本数"
        note="³ 剔除 AI 默认答卷"
        color={DEEP_BLUE}
      />
    </div>
  );
}

function MetricRow({ value, width, label, note, color }) {
  return (
    <div>
      <div style={{display:'flex', alignItems:'baseline', gap: 10, marginBottom: 8}}>
        <div style={{fontFamily: serif, fontSize: 72, fontWeight: 500,
          color: INK, lineHeight: 0.95, letterSpacing:'-0.02em',
          fontVariantNumeric:'tabular-nums'}}>
          {value}
        </div>
      </div>
      <div style={{height: 6, background: '#eee7d7', width:'100%',
        marginBottom: 10, position:'relative'}}>
        <div style={{position:'absolute', top:0, left:0, height:'100%',
          width, background: color}}/>
      </div>
      <div style={{fontFamily: serif, fontSize: 15, color: INK, lineHeight: 1.4}}>
        {label}
        <span style={{fontFamily: mono, fontSize: 9, color: ASH,
          verticalAlign:'super', marginLeft: 4}}>{note}</span>
      </div>
    </div>
  );
}

function ColumnMid({ elapsed }) {
  const e = Math.max(0, elapsed);
  const labelOp = interpolate(e, [0, 0.4], [0, 1]);
  // 5 bars, staggered 0.15s
  const bars = [
    { name:'长文创作', pct: 78, color: TERRA },
    { name:'短内容', pct: 64, color: OLIVE },
    { name:'标题/文案', pct: 52, color: DEEP_BLUE },
    { name:'润色校对', pct: 41, color: ASH },
    { name:'翻译', pct: 29, color: ASH },
  ];
  const chartH = 320;
  const maxPct = 100;

  return (
    <div style={{display:'flex', flexDirection:'column', gap: 18}}>
      <div style={{fontFamily: mono, fontSize: 10, letterSpacing:'0.3em',
        color: TERRA, opacity: labelOp}}>
        COLUMN / 02 · 用途分布
      </div>
      <div style={{fontFamily: serif, fontSize: 28, fontWeight: 500,
        color: INK, lineHeight: 1.2, opacity: labelOp,
        letterSpacing: '-0.01em'}}>
        你最常用 AI 做什么？
      </div>
      <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 13,
        color: ASH, opacity: labelOp}}>
        多选题 · 百分比占全样本
      </div>
      {/* chart */}
      <div style={{position:'relative', height: chartH, display:'flex',
        alignItems:'flex-end', gap: 18, padding: '0 8px', marginTop: 4,
        borderBottom:`1px solid ${INK}`}}>
        {/* y-axis gridlines */}
        {[25, 50, 75, 100].map(v => (
          <div key={v} style={{position:'absolute', left: 0, right: 0,
            bottom: (v/maxPct)*chartH, height: 1,
            borderTop:`1px dashed ${LINE}`, pointerEvents:'none'}}>
            <div style={{position:'absolute', left: -36, top: -8,
              fontFamily: mono, fontSize: 9, color: ASH,
              letterSpacing:'0.05em'}}>
              {v}%
            </div>
          </div>
        ))}
        {bars.map((b, i) => {
          const delay = 0.8 + i * 0.15;
          const growT = Math.max(0, Math.min(1, (e - delay) / 0.55));
          const h = growT * (b.pct / maxPct) * chartH;
          const labelOpB = Math.max(0, Math.min(1, (e - delay - 0.35) / 0.3));
          return (
            <div key={i} style={{flex: 1, position:'relative',
              display:'flex', flexDirection:'column', alignItems:'center',
              justifyContent:'flex-end', height:'100%'}}>
              <div style={{position:'absolute', top: -22,
                fontFamily: mono, fontSize: 11, color: INK,
                letterSpacing:'0.02em', fontVariantNumeric:'tabular-nums',
                opacity: labelOpB}}>
                {b.pct}%
              </div>
              <div style={{width: '100%', height: h, background: b.color,
                transition:'none'}}/>
            </div>
          );
        })}
      </div>
      {/* x-axis labels */}
      <div style={{display:'flex', gap: 18, padding: '0 8px', marginTop: -8}}>
        {bars.map((b, i) => (
          <div key={i} style={{flex: 1, textAlign:'center',
            fontFamily: serif, fontSize: 12, color: INK,
            letterSpacing:'0.02em', opacity: labelOp}}>
            {b.name}
          </div>
        ))}
      </div>
    </div>
  );
}

function ColumnRight({ elapsed }) {
  const e = Math.max(0, elapsed);
  const labelOp = interpolate(e, [0, 0.4], [0, 1]);
  // Three pie slices sweep in
  const slices = [
    { label:'Claude', pct: 46, color: TERRA },
    { label:'GPT', pct: 31, color: DEEP_BLUE },
    { label:'GLM/国产', pct: 23, color: OLIVE },
  ];
  const cx = 130, cy = 130, r = 104;
  const C = 2 * Math.PI * r;

  // cumulative pct as fractions
  let acc = 0;
  const slicesCalc = slices.map((s, i) => {
    const delay = 0.6 + i * 0.45;
    const sweepT = Math.max(0, Math.min(1, (e - delay) / 0.7));
    const start = acc;
    const end = acc + s.pct / 100;
    acc = end;
    return { ...s, start, end, sweepT, delay };
  });

  return (
    <div style={{display:'flex', flexDirection:'column', gap: 14}}>
      <div style={{fontFamily: mono, fontSize: 10, letterSpacing:'0.3em',
        color: TERRA, opacity: labelOp}}>
        COLUMN / 03 · 模型占有率
      </div>
      <div style={{fontFamily: serif, fontSize: 24, fontWeight: 500,
        color: INK, lineHeight: 1.2, opacity: labelOp,
        letterSpacing:'-0.01em'}}>
        主力模型分布
      </div>
      <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 12,
        color: ASH, opacity: labelOp, marginBottom: 6}}>
        单选题 · 日常首选
      </div>

      <div style={{display:'flex', alignItems:'center', gap: 18}}>
        <svg width="260" height="260" viewBox="0 0 260 260">
          {/* Background ring */}
          <circle cx={cx} cy={cy} r={r} fill="none"
            stroke={LINE} strokeWidth={1}/>
          {slicesCalc.map((s, i) => {
            // Draw partial arc with stroke-dasharray
            const sweepLen = (s.end - s.start) * s.sweepT;
            const dash = sweepLen * C;
            const gap = C - dash;
            const rot = s.start * 360 - 90;
            return (
              <circle key={i} cx={cx} cy={cy} r={r}
                fill="none" stroke={s.color} strokeWidth={28}
                strokeDasharray={`${dash} ${gap}`}
                strokeDashoffset={0}
                transform={`rotate(${rot} ${cx} ${cy})`}
                opacity={0.95}/>
            );
          })}
          {/* Inner text */}
          <text x={cx} y={cy - 4} textAnchor="middle"
            fontFamily={serif} fontSize={34} fill={INK}
            fontWeight={500} letterSpacing="-0.5">
            n=156
          </text>
          <text x={cx} y={cy + 22} textAnchor="middle"
            fontFamily={mono} fontSize={10} fill={ASH}
            letterSpacing="0.2em">
            TOTAL
          </text>
        </svg>
        <div style={{display:'flex', flexDirection:'column', gap: 14, flex: 1}}>
          {slicesCalc.map((s, i) => {
            const txtOp = Math.max(0, Math.min(1, (e - s.delay - 0.3) / 0.4));
            return (
              <div key={i} style={{display:'flex', alignItems:'baseline',
                gap: 10, opacity: txtOp}}>
                <div style={{width: 10, height: 10, background: s.color,
                  marginTop: 4, flexShrink: 0}}/>
                <div style={{flex: 1}}>
                  <div style={{fontFamily: serif, fontSize: 18,
                    fontWeight: 500, color: INK, letterSpacing:'0.01em'}}>
                    {s.label}
                  </div>
                </div>
                <div style={{fontFamily: serif, fontSize: 22,
                  fontWeight: 500, color: INK,
                  fontVariantNumeric:'tabular-nums'}}>
                  {s.pct}%
                </div>
              </div>
            );
          })}
        </div>
      </div>
    </div>
  );
}

function FooterTrend({ elapsed }) {
  const e = Math.max(0, elapsed);
  const op = interpolate(e, [0, 0.5], [0, 1]);
  const data = [12, 18, 24, 31, 38, 48, 57, 64, 71, 78, 84, 87];
  const months = ['05','06','07','08','09','10','11','12','01','02','03','04'];
  const W = 1760, H = 86, PAD = 8;
  const maxV = 100;
  // progressive reveal of line
  const revealT = Math.max(0, Math.min(1, (e - 0.3) / 1.4));
  const nPoints = Math.max(1, Math.floor(revealT * data.length));
  const pts = [];
  for (let i = 0; i < data.length; i++) {
    const x = (i / (data.length - 1)) * W;
    const y = H - (data[i] / maxV) * (H - PAD * 2) - PAD;
    pts.push([x, y]);
  }
  const visiblePts = pts.slice(0, nPoints);
  const d = visiblePts.map((p, i) => (i === 0 ? 'M' : 'L') + p[0].toFixed(1) + ' ' + p[1].toFixed(1)).join(' ');
  const area = visiblePts.length > 1
    ? d + ` L ${visiblePts[visiblePts.length-1][0].toFixed(1)} ${H} L 0 ${H} Z`
    : '';

  return (
    <div style={{marginTop: 26, opacity: op}}>
      <div style={{display:'flex', justifyContent:'space-between',
        alignItems:'baseline', marginBottom: 8}}>
        <div style={{fontFamily: mono, fontSize: 10, color: TERRA,
          letterSpacing:'0.3em'}}>TREND · 过去 12 个月 AI 周使用率（%）</div>
        <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 13,
          color: ASH}}>
          从 12% 到 87% · 增长 7.25×
        </div>
      </div>
      <svg width={W} height={H} viewBox={`0 0 ${W} ${H}`}
        style={{display:'block', width:'100%', height: H}}>
        {area && <path d={area} fill={TERRA} opacity={0.08}/>}
        {d && <path d={d} fill="none" stroke={TERRA} strokeWidth={1.6}/>}
        {visiblePts.map((p, i) => (
          <circle key={i} cx={p[0]} cy={p[1]} r={2.4} fill={TERRA}/>
        ))}
        {/* Axis labels */}
        {pts.map((p, i) => (
          <text key={i} x={p[0]} y={H - 0}
            textAnchor="middle" fontFamily={mono} fontSize={9} fill={ASH}
            opacity={0.6}>
            {months[i]}
          </text>
        ))}
      </svg>
    </div>
  );
}

// ── Scene 3: Typography close-up (10 – 17s) ───────────────
function Scene3_Typography() {
  const { elapsed } = useSprite();
  const fadeIn = interpolate(elapsed, [0, 0.6], [0, 1]);
  const fadeOut = interpolate(elapsed, [6.5, 7.0], [1, 0], Easing.easeIn);
  const opacity = Math.min(fadeIn, fadeOut);
  const labelOp = interpolate(elapsed, [0.2, 0.8], [0, 1]);
  const leftOp = interpolate(elapsed, [0.4, 1.2], [0, 1]);
  const compareOp = interpolate(elapsed, [1.8, 2.6], [0, 1]);
  const captionOp = interpolate(elapsed, [3.6, 4.4], [0, 1]);

  // Pulsing scale on "87"
  const pulse = 1 + Math.sin(elapsed * 1.6) * 0.008;

  return (
    <div style={{position:'absolute', inset:0, background: CREAM, opacity,
      padding: '60px 80px', display:'flex', flexDirection:'column'}}>
      {/* Top label */}
      <div style={{display:'flex', alignItems:'baseline',
        justifyContent:'space-between', marginBottom: 32, opacity: labelOp}}>
        <div>
          <div style={{fontFamily: mono, fontSize: 11, color: TERRA,
            letterSpacing:'0.3em', marginBottom: 6}}>DETAIL · ZOOM 1.5×</div>
          <div style={{fontFamily: serif, fontSize: 46, fontWeight: 500,
            color: INK, letterSpacing:'-0.01em'}}>
            排版细节：<span style={{fontStyle:'italic', color: TERRA}}>品味税</span>
          </div>
        </div>
        <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 18,
          color: ASH, textAlign:'right', maxWidth: 400, lineHeight: 1.5}}>
          "AI 能写中文，但分不清什么是好的中文排版"
        </div>
      </div>

      <div style={{display:'grid', gridTemplateColumns:'1.25fr 1fr',
        gap: 56, flex: 1}}>
        {/* Left: Number gradient showcase */}
        <div style={{opacity: leftOp, display:'flex', flexDirection:'column',
          gap: 28}}>
          <div style={{fontFamily: mono, fontSize: 10, color: ASH,
            letterSpacing:'0.3em'}}>01 · 字号梯度 · HIERARCHY</div>
          <div style={{display:'flex', alignItems:'baseline', gap: 36,
            borderBottom:`1px solid ${LINE}`, paddingBottom: 28}}>
            <div style={{fontFamily: serif, fontSize: 220, fontWeight: 500,
              color: INK, lineHeight: 0.88, letterSpacing:'-0.04em',
              fontVariantNumeric:'tabular-nums', display:'inline-block',
              transform:`scale(${pulse})`, transformOrigin:'left bottom'}}>
              87<span style={{fontSize: 80, color: TERRA,
                verticalAlign:'super', marginLeft: 4, fontStyle:'italic'}}>%</span>
            </div>
            <div style={{fontFamily: serif, fontSize: 110, fontWeight: 400,
              color: OLIVE, lineHeight: 0.88, letterSpacing:'-0.02em',
              fontVariantNumeric:'tabular-nums'}}>
              3.2<span style={{fontSize: 44, fontStyle:'italic',
                color: ASH, marginLeft: 2}}>×</span>
            </div>
            <div style={{fontFamily: serif, fontSize: 56, fontWeight: 400,
              color: DEEP_BLUE, lineHeight: 0.88,
              fontVariantNumeric:'tabular-nums'}}>
              156
            </div>
          </div>
          <div style={{fontFamily: serif, fontSize: 15, color: ASH,
            lineHeight: 1.55, maxWidth: 580}}>
            主数据 <span style={{color: INK, fontWeight: 500}}>220pt</span>、
            次级 <span style={{color: INK, fontWeight: 500}}>110pt</span>、
            辅助 <span style={{color: INK, fontWeight: 500}}>56pt</span>——
            梯度 2× 不是工程师拍脑袋，是几百年印刷品的视觉惯性。
          </div>

          <div style={{fontFamily: mono, fontSize: 10, color: ASH,
            letterSpacing:'0.3em', marginTop: 10}}>02 · 换行 · TEXT-WRAP: PRETTY</div>
          <div style={{fontFamily: serif, fontSize: 34, fontWeight: 500,
            color: INK, lineHeight: 1.25, letterSpacing:'-0.01em',
            maxWidth: 620, textWrap:'pretty'}}>
            标题在该断的地方断开<br/>
            避免孤字和单字成行
          </div>

          <div style={{fontFamily: mono, fontSize: 10, color: ASH,
            letterSpacing:'0.3em', marginTop: 4}}>03 · 上标辅注 · MONO FOOTNOTE</div>
          <div style={{fontFamily: serif, fontSize: 20, color: INK,
            lineHeight: 1.6, maxWidth: 620}}>
            87%
            <span style={{fontFamily: mono, fontSize: 11, color: TERRA,
              verticalAlign:'super', marginLeft: 4}}>¹</span>
            用户每周用 AI 辅助写作
            <div style={{fontFamily: mono, fontSize: 11, color: ASH,
              marginTop: 10, letterSpacing:'0.05em'}}>
              ¹ 基于 156 位创作者调研，每周 ≥ 3 次
            </div>
          </div>
        </div>

        {/* Right: AI slop vs 精致 */}
        <div style={{opacity: compareOp, display:'flex', flexDirection:'column',
          gap: 20}}>
          <div style={{fontFamily: mono, fontSize: 10, color: ASH,
            letterSpacing:'0.3em'}}>04 · AI SLOP vs 精致版</div>
          {/* Slop version */}
          <div style={{position:'relative', border: `1.5px dashed #c06060`,
            padding: '22px 22px', borderRadius: 16,
            background: 'linear-gradient(135deg, #6a47d4 0%, #3a1a7a 100%)'}}>
            <div style={{position:'absolute', top: -10, left: 14,
              background: '#c06060', color:'#fff', fontFamily: mono,
              fontSize: 9, padding:'2px 10px', letterSpacing:'0.2em'}}>
              ✕ 反例 · 不要这样做
            </div>
            <div style={{fontFamily: sans, fontSize: 28, fontWeight: 700,
              color:'#fff', marginBottom: 6, letterSpacing:'-0.01em'}}>
              🚀 AI 写作工具爆发增长！
            </div>
            <div style={{fontFamily: sans, fontSize: 13, color:'rgba(255,255,255,0.85)',
              lineHeight: 1.5}}>
              ✨ 87% 用户都在用！💡 效率提升 3.2 倍！🎯 赶紧加入！
            </div>
            <div style={{marginTop: 14, display:'flex', gap: 8}}>
              <div style={{background:'rgba(255,255,255,0.2)',
                padding:'6px 12px', borderRadius: 999,
                fontFamily: sans, fontSize: 11, color:'#fff'}}>
                #AI写作
              </div>
              <div style={{background:'rgba(255,255,255,0.2)',
                padding:'6px 12px', borderRadius: 999,
                fontFamily: sans, fontSize: 11, color:'#fff'}}>
                #爆款
              </div>
            </div>
          </div>

          {/* Good version */}
          <div style={{position:'relative', background:'#fff',
            border: `1px solid ${LINE}`, padding: '22px 22px'}}>
            <div style={{position:'absolute', top: -10, left: 14,
              background: TERRA, color:'#fff', fontFamily: mono,
              fontSize: 9, padding:'2px 10px', letterSpacing:'0.2em'}}>
              ✓ 精致版 · DO THIS
            </div>
            <div style={{fontFamily: mono, fontSize: 9, color: TERRA,
              letterSpacing:'0.3em', marginBottom: 4}}>ESSAY · 2026.04</div>
            <div style={{fontFamily: serif, fontSize: 26, fontWeight: 500,
              color: INK, lineHeight: 1.2, letterSpacing:'-0.01em',
              marginBottom: 8}}>
              AI 写作<br/>
              <span style={{fontStyle:'italic'}}>悄然</span>改变创作者
            </div>
            <div style={{height: 1, background: INK, width: 70, marginBottom: 10}}/>
            <div style={{fontFamily: serif, fontSize: 13, color:'#444',
              lineHeight: 1.6}}>
              87% 的创作者已经把 AI 纳入日常工作流；
              效率提升 3.2×，但人味不减反增——
              工具不定义内容，品味才定义。
            </div>
          </div>
        </div>
      </div>

      {/* Caption */}
      <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 20,
        color: ASH, textAlign:'center', marginTop: 22, opacity: captionOp,
        letterSpacing:'0.02em'}}>
        排版细节是 AI 分不清的 <span style={{color: TERRA, fontWeight: 500,
          fontStyle:'normal'}}>品味税</span>
      </div>
    </div>
  );
}

// ── Scene 4: Outro (17 – 22s) ─────────────────────────────
function Scene4_Outro() {
  const { elapsed } = useSprite();
  const fadeIn = interpolate(elapsed, [0, 0.6], [0, 1]);
  const mainY = interpolate(elapsed, [0, 1.2], [28, 0], Easing.easeOut);
  const italicOp = interpolate(elapsed, [0.8, 1.4], [0, 1]);
  const lineW = interpolate(elapsed, [1.0, 1.8], [0, 680]);
  const subOp = interpolate(elapsed, [1.6, 2.2], [0, 1]);
  const monoOp = interpolate(elapsed, [2.4, 3.2], [0, 1]);
  const monoLineW = interpolate(elapsed, [2.8, 3.8], [0, 520]);

  return (
    <div style={{position:'absolute', inset:0, background: CREAM, opacity: fadeIn,
      display:'flex', alignItems:'center', justifyContent:'center',
      flexDirection:'column'}}>
      <div style={{fontFamily: mono, fontSize: 12, letterSpacing:'0.4em',
        color: TERRA, marginBottom: 32, opacity: fadeIn}}>
        HUASHU-DESIGN · INFOGRAPHIC CAPABILITY
      </div>

      <div style={{fontFamily: serif, fontSize: 148, fontWeight: 500,
        color: INK, lineHeight: 1, letterSpacing:'-0.02em',
        transform:`translateY(${mainY}px)`}}>
        <span style={{fontStyle:'italic', opacity: italicOp}}>数据</span>
        <span style={{opacity: fadeIn}}> 配得上 </span>
        <span style={{color: TERRA, opacity: italicOp}}>好看</span>
      </div>

      <div style={{height: 1, background: INK, width: lineW, marginTop: 44}}/>

      <div style={{fontFamily: serif, fontStyle:'italic', fontSize: 24,
        color: ASH, marginTop: 26, opacity: subOp, letterSpacing:'0.02em'}}>
        印刷级 · 不因为缩放而失真
      </div>

      <div style={{marginTop: 60, opacity: monoOp,
        display:'flex', alignItems:'center', flexDirection:'column', gap: 14}}>
        <div style={{height: 1, background: LINE, width: monoLineW}}/>
        <div style={{fontFamily: mono, fontSize: 14, color: INK,
          letterSpacing:'0.18em'}}>
          export → <span style={{color: TERRA}}>PDF 矢量</span> /
          <span style={{color: OLIVE}}> PNG 300dpi</span> /
          <span style={{color: DEEP_BLUE}}> SVG 原生</span>
        </div>
        <div style={{height: 1, background: LINE, width: monoLineW}}/>
      </div>
    </div>
  );
}

// ── Watermark ─────────────────────────────────────────────
function Watermark() {
  return (
    <div style={{position:'absolute', bottom: 24, right: 32,
      fontSize: 11, color: 'rgba(0,0,0,0.38)', letterSpacing:'0.15em',
      fontFamily: mono, pointerEvents:'none', zIndex: 100}}>
      Created by Huashu-Design
    </div>
  );
}

// ── Composition ───────────────────────────────────────────
function App() {
  return (
    <Stage duration={22} width={1920} height={1080} bgColor={CREAM}>
      <Sprite start={0} end={3}><Scene1_Title /></Sprite>
      <Sprite start={3} end={10}><Scene2_Spread /></Sprite>
      <Sprite start={10} end={17}><Scene3_Typography /></Sprite>
      <Sprite start={17} end={22}><Scene4_Outro /></Sprite>
      <Watermark />
    </Stage>
  );
}

ReactDOM.createRoot(document.getElementById('root')).render(<App />);
</script>
</body>
</html>
