:root{--bg:#f5eedb;--fg:#26221a;--seal:#8c2f23;--dim:rgba(38,34,26,0.65);
        --line:rgba(38,34,26,0.12);--mono:ui-monospace,"SF Mono",Menlo,monospace;
        --serif:"Songti SC","Source Han Serif SC",Georgia,serif;}
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{margin:0;background:var(--bg);color:var(--fg);line-height:1.65;
       font-family:-apple-system,"PingFang SC",system-ui,sans-serif;-webkit-font-smoothing:antialiased}
  .wrap{max-width:1120px;margin:0 auto;padding:0 26px 120px}

  /* 顶部固定条 */
  .topnav{position:sticky;top:0;z-index:40;background:rgba(245,238,219,.94);backdrop-filter:blur(8px);
          border-bottom:1px solid var(--line)}
  .topnav .in{max-width:1120px;margin:0 auto;padding:11px 26px;display:flex;gap:18px;align-items:center;
              font-family:var(--mono);font-size:11px;color:var(--dim);overflow-x:auto;white-space:nowrap}
  .topnav a{color:var(--dim);text-decoration:none}
  .topnav a:hover{color:var(--seal)}
  .topnav .brand{color:var(--fg);font-weight:700;letter-spacing:.04em;margin-right:6px}

  .kicker{font-family:var(--mono);font-size:11px;letter-spacing:.26em;color:var(--dim);margin:64px 0 14px}
  h1{font-size:clamp(26px,4vw,50px);line-height:1.14;margin:0 0 18px;font-weight:800;letter-spacing:-.02em}
  h1 em{font-style:normal;color:var(--seal)}
  h2{font-size:clamp(20px,2.6vw,28px);line-height:1.3;margin:0 0 12px;font-weight:700;letter-spacing:-.01em}
  p.lede{font-size:16px;color:rgba(38,34,26,0.82);max-width:46em;margin:0 0 10px}
  p.lede b{color:var(--fg)}
  section{margin-top:74px;scroll-margin-top:64px}

  .nums{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:var(--line);margin:34px 0 0}
  .num{background:var(--bg);padding:20px 16px}
  .num .v{font-family:var(--mono);font-size:clamp(22px,3vw,34px);font-weight:700;display:block;letter-spacing:-.02em}
  .num .k{font-size:11.5px;color:var(--dim);margin-top:5px;display:block}

  svg{display:block;width:100%;height:auto;overflow:visible;margin-top:12px}
  .tip{font-family:var(--mono);font-size:11px;color:var(--dim);margin-top:8px;line-height:1.7}
  .legend{display:flex;gap:18px;flex-wrap:wrap;margin-top:14px;font-family:var(--mono);font-size:11px;color:var(--dim)}
  .legend i{display:inline-block;width:20px;height:2px;margin-right:6px;vertical-align:middle}

  /* 滑块 */
  .scrub{background:rgba(38,34,26,0.04);border:1px solid var(--line);padding:16px 18px;margin-top:16px}
  .scrub .row{display:flex;gap:18px;align-items:center;flex-wrap:wrap}
  input[type=range]{-webkit-appearance:none;appearance:none;flex:1;min-width:220px;height:2px;background:var(--line);outline:none}
  input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:14px;height:14px;border-radius:50%;background:var(--seal);cursor:pointer}
  .readout{font-family:var(--mono);font-size:12px;color:var(--dim);display:flex;gap:16px;flex-wrap:wrap}
  .readout b{color:var(--fg)}

  /* 计分卡 */
  .score{margin-top:14px;border-top:1px solid var(--line)}
  .srow{display:grid;grid-template-columns:88px 1.3fr 1.2fr 96px;gap:14px;padding:14px 0;border-bottom:1px solid var(--line);align-items:start}
  .sd{font-family:var(--mono);font-size:10px;letter-spacing:.14em;color:var(--dim);padding-top:3px}
  .sq{font-family:var(--serif);font-size:14px;line-height:1.55;color:rgba(38,34,26,0.92)}
  .sr{font-size:12.5px;color:var(--dim);line-height:1.6}
  .sr b{color:var(--fg)}
  .sv{font-family:var(--mono);font-size:10px;padding:4px 7px;border-radius:2px;text-align:center;white-space:nowrap;
      background:rgba(38,34,26,0.07);border:1px solid var(--line);color:rgba(38,34,26,0.7)}

  /* 三声部 */
  .voice{display:grid;grid-template-columns:1.4fr .9fr;gap:36px;padding:26px 0;border-bottom:1px solid var(--line)}
  .voice blockquote{margin:0;font-family:var(--serif);font-size:clamp(17px,2.1vw,22px);line-height:1.55}
  .voice blockquote::before{content:"「";color:var(--seal)}
  .voice blockquote::after{content:"」";color:var(--seal)}
  .voice .src{font-family:var(--mono);font-size:11px;color:var(--dim);margin-top:10px}
  .voice .acct{border-left:2px solid var(--seal);padding-left:14px}
  .voice .acct .lbl{font-family:var(--mono);font-size:10px;letter-spacing:.16em;color:var(--dim)}
  .voice .acct .bal{font-family:var(--mono);font-size:22px;font-weight:700;margin-top:4px}
  .voice .acct .lag{font-family:var(--mono);font-size:11px;color:var(--dim);margin-top:8px}

  .note{margin-top:46px;padding-top:18px;border-top:1px solid var(--line);font-size:13px;color:var(--dim);max-width:56em;line-height:1.85}
  .note b{color:var(--fg)}
  .note summary{cursor:pointer;color:var(--fg);padding:6px 0}.voice a,.note a{color:inherit;text-underline-offset:4px}.voice p{font-size:14px;line-height:1.85}.voice .kicker{font-size:10px}
  .note code{font-family:var(--mono);font-size:12px;color:rgba(38,34,26,0.7)}
  .foot{margin-top:60px;padding-top:20px;border-top:1px solid var(--line);font-family:var(--mono);
        font-size:11px;color:rgba(38,34,26,0.65);line-height:2}
  @media(max-width:760px){
    .nums{grid-template-columns:repeat(2,1fr)}
    .srow{grid-template-columns:1fr;gap:5px}
    .voice{grid-template-columns:1fr;gap:18px}
  }

  a:focus-visible,input:focus-visible,summary:focus-visible,[role=button]:focus-visible{outline:2px solid var(--seal);outline-offset:5px}
  .chart-scroll{max-width:100%;overflow-x:auto;padding:0 0 18px;scrollbar-width:thin}
  .chart-text{margin-top:12px;padding:10px 0;border-top:1px solid var(--line);color:var(--dim);font-size:13px}
  .chart-text summary{cursor:pointer;min-height:38px;padding:6px 0}.chart-text li{margin:9px 0;line-height:1.85}.chart-text ul{padding-left:20px}
  @media(max-width:760px){.chart-scroll svg{min-width:1000px}.chart-scroll{border-bottom:1px solid var(--line)}.wrap{padding-left:20px;padding-right:20px}input[type=range]{min-width:0;width:100%;flex-basis:100%;min-height:44px}.readout{font-size:12px}.voice .acct{font-size:14px}}
  @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important;animation:none!important}}

  .skip{position:absolute;left:20px;top:-80px;z-index:60;background:var(--bg);color:var(--fg);padding:12px}
  .skip:focus{top:12px}
  .review-note{border:1px solid var(--line);padding:12px 16px;margin-top:24px;color:var(--dim);font-size:13px}
  .review-note a{color:var(--fg);text-underline-offset:4px}
  .topnav a{display:inline-flex;align-items:center;min-height:44px}
  .topnav .in{padding-top:2px;padding-bottom:2px}
  .chart-scroll:focus-visible{outline:2px solid var(--seal);outline-offset:3px}

/* Reuse site.css's paper, ink, stamp and brand navigation. Charts stay wide. */
@view-transition{navigation:none}
:root{--bg:var(--paper);--fg:var(--ink);--seal:var(--stamp);--dim:var(--ink-soft);--line:#d9cba9;--serif:Georgia,"Times New Roman","Songti SC",serif}
body{font-family:var(--serif);font-size:18px;background:var(--paper);color:var(--ink);line-height:1.8}
.case-header-shell{max-width:1120px;padding:0 26px;margin:0 auto}
.case-header-shell .topbar{position:relative;gap:12px;min-height:84px}
.case-header-shell .brand-lockup__text{max-width:300px}
.case-header-links{display:flex;align-items:center;gap:20px;font:12px/1.5 "Courier New",monospace;flex-wrap:wrap}
.case-header-links a{min-height:44px;display:inline-flex;align-items:center}
.case-header-links a:hover{color:var(--stamp)}
.case-header-links .lang-switch{display:flex;gap:8px;align-items:center}
.lang-switch [aria-current=page]{color:var(--stamp);font-weight:700;text-decoration:underline;text-underline-offset:5px}
.topnav{position:static;background:var(--paper-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.topnav .in{font-size:12px;gap:22px;padding-top:2px;padding-bottom:2px}
.topnav a{color:var(--ink-soft)}
.topnav a:hover{color:var(--stamp)}
.kicker{color:var(--brown);font-size:12px;letter-spacing:.13em;margin-top:54px}
h1{font-family:var(--serif);font-weight:700;font-size:clamp(32px,4.6vw,56px);line-height:1.2;max-width:950px;margin-bottom:28px;text-wrap:balance}
h1 em{color:var(--stamp)}
h2{font-family:var(--serif);font-size:clamp(23px,2.7vw,32px);line-height:1.4;text-wrap:balance}
p.lede{font-size:18px;color:var(--ink-soft);line-height:1.95;max-width:46em;margin-bottom:16px}
p.lede b,.sr b,.note b,.readout b{color:var(--ink)}
section{margin-top:76px;scroll-margin-top:24px}
section>.kicker{border-top:1px solid var(--line);padding-top:22px}
.nums{border:1px solid var(--line);background:var(--line);border-radius:16px;overflow:hidden}
.num{background:var(--paper-hi);padding:22px 18px}
.num .v{color:var(--stamp);font-size:clamp(23px,3vw,34px)}
.num .k{font-family:var(--mono);font-size:12px;color:var(--ink-soft)}
.review-note{background:var(--paper-soft);border:1px solid var(--line);border-radius:12px;font-family:var(--mono);line-height:1.9;color:var(--ink-soft)}
.review-note:first-child{font-size:12px;background:transparent;border-style:dashed}
.review-note:first-child a{margin-inline-start:.5em}
.review-note a{color:var(--stamp)}
.voice{padding:30px 24px;margin-top:38px;background:var(--paper-hi);border:1px solid var(--line);border-radius:16px}
.voice .acct{border-color:var(--stamp)}
.tip,.legend,.src,.sr,.sd,.readout,.chart-text,.note{color:var(--ink-soft)}
.sq{color:var(--ink);font-size:16px}
.sr{font-size:14px}
.srow{grid-template-columns:100px 1.3fr 1.2fr 120px;gap:18px}
.sv{font-size:11px;white-space:normal;color:var(--stamp);background:var(--stamp-soft);border-color:var(--line)}
.scrub{background:var(--paper-hi);border-color:var(--line);border-radius:12px}
.chart-scroll{margin-top:20px;padding:12px 0 20px;border-bottom:1px solid var(--line)}
.chart-scroll svg{margin-top:0}
.chart-hint{display:none}
.mobile-chart-controls,.mobile-product-toggle{display:none}
.chart-text{font-size:14px;border-color:var(--line)}
.chart-text summary,.note summary{color:var(--stamp);min-height:44px}
.chart-text summary:hover,.note summary:hover{text-decoration:underline;text-underline-offset:4px}
.foot{color:var(--brown);border-color:var(--line);font-size:12px}
input[type=range]{background:transparent}
input[type=range]::-webkit-slider-runnable-track{height:2px;background:var(--line)}
input[type=range]::-webkit-slider-thumb{background:var(--stamp);margin-top:-6px}
input[type=range]::-moz-range-track{height:2px;background:var(--line)}
input[type=range]::-moz-range-thumb{width:14px;height:14px;background:var(--stamp);border:0;border-radius:50%}
a:focus-visible,input:focus-visible,summary:focus-visible,[tabindex]:focus-visible{outline:2px solid var(--stamp);outline-offset:4px}
html[lang=en] h1{max-width:900px;letter-spacing:-.025em}
html[lang=en] .voice p{font-size:16px}
html[lang=en] .kicker{letter-spacing:.08em}
html[lang=en] .srow{grid-template-columns:100px 1.3fr 1.2fr 120px}
@media(max-width:767px){
 html{scroll-behavior:auto}
 .wrap,.wrap section,.case-header-shell{width:100%;min-width:0}
 .case-header-shell{padding:0 20px}.case-header-shell .topbar{padding:16px 0;gap:6px}
 .case-header-shell .brand-lockup{max-width:100%}
 .case-header-shell .brand-lockup__mark{flex:0 0 42px;width:42px;height:42px}
 .case-header-shell .brand-lockup__text{min-width:0;max-width:100%}
 .case-header-shell .brand-lockup__en{white-space:normal;overflow-wrap:anywhere;line-height:1.5;letter-spacing:.08em;font-size:10px}
 .case-header-links{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:12px;width:100%;font-size:11px}
 .case-header-links>a:nth-child(2){justify-self:center}
 .case-header-links>a{min-width:0;overflow-wrap:anywhere}
 .case-header-links .lang-switch{display:flex;justify-self:end;white-space:nowrap}
 .topnav .in{min-width:0;padding-left:20px;padding-right:20px;scrollbar-width:thin}
 .wrap{padding-left:20px;padding-right:20px}
 .review-note,.note,.foot{overflow-wrap:anywhere}
 .nums{grid-template-columns:repeat(2,minmax(0,1fr))}
 .nums>*,.voice>*,.srow>*{min-width:0}
 p.lede{font-size:17px;line-height:1.9}.voice{grid-template-columns:1fr;padding:20px 16px;gap:16px}
 .chart-scroll{width:100%;min-width:0;max-width:100%;overflow-x:auto;overscroll-behavior-inline:contain}
 .chart-scroll svg{width:1120px;min-width:1120px;max-width:none}
 .chart-hint{display:block;margin:18px 0 -8px;color:var(--stamp);font:12px/1.7 var(--mono)}
 .chart-scroll[hidden],.chart-hint[hidden],.chart-text[hidden]{display:none}
 .mobile-chart-controls{display:flex;gap:8px;margin:20px 0 12px;flex-wrap:wrap}
 .mobile-chart-controls button,.mobile-product-toggle{min-height:44px;padding:10px 14px;border:1px solid var(--line);border-radius:8px;background:var(--paper-hi);color:var(--ink);font:13px/1.5 var(--mono);cursor:pointer}
 .mobile-chart-controls button[aria-pressed=true],.mobile-product-toggle[aria-pressed=true]{background:var(--stamp);color:var(--paper-hi);border-color:var(--stamp)}
 .chart-text.mobile-records{border:0;margin-top:0;padding-top:0}
 .chart-text.mobile-records>summary{display:none}
 .chart-text.mobile-records ul{list-style:none;padding:0;margin:0;display:grid;gap:10px}
 .chart-text.mobile-records li{margin:0;padding:15px 16px;border:1px solid var(--line);border-radius:12px;background:var(--paper-hi);font-size:15px;line-height:1.85;overflow-wrap:anywhere}
 .chart-text.mobile-records li.is-current{border-color:var(--stamp);background:var(--paper-soft)}
 .mobile-product-toggle{display:block;margin-top:10px;text-align:left}
 .tip{font-size:14px;line-height:1.85}.legend{font-size:12px;gap:12px}
 input[type=range]{min-width:0;width:100%;flex-basis:100%;min-height:44px}
 .readout{font-size:13px;gap:10px}.readout span{max-width:100%;overflow-wrap:anywhere}
 .srow,html[lang=en] .srow{grid-template-columns:1fr;gap:7px}
 .sv{justify-self:start}.num{padding:18px 12px}.num .k{font-size:11px}
 .kicker{margin-top:38px}section{margin-top:56px}
}

/* Reading rhythm: examples first, optional record inventories. */
.opening-scene{margin:28px 0;padding:22px 0;border-block:1px solid var(--line)}
.opening-scene .kicker{margin-top:0}
.observer-note{margin:24px 0;padding:20px 24px;border-left:3px solid var(--stamp);background:var(--paper-soft)}
.observer-note .kicker{margin-top:0}
.observer-note p{line-height:1.9}
.chart-note{margin-top:16px;font-size:14px;color:var(--ink-soft)}
.chart-note summary{cursor:pointer;min-height:44px;display:flex;align-items:center;color:var(--stamp)}
.mobile-record-more{display:none}
@media(max-width:767px){
 .chart-text.mobile-records li[hidden]{display:none}
 .mobile-record-more{display:block;min-height:44px;margin:12px 0 20px;padding:8px 16px;border:1px solid var(--line);border-radius:8px;background:transparent;color:var(--stamp);font:inherit;font-size:14px;cursor:pointer}
 .mobile-record-more[hidden]{display:none}
 .opening-scene{margin:24px 0;padding:18px 0}
 .observer-note{padding:16px;margin:20px 0}
}

/* Let the scenes read without a separate editorial sidebar. */
.voice{grid-template-columns:1fr;gap:10px}
.voice .acct{border:0;padding:0}
.score .srow{grid-template-columns:85px 1.2fr 1.4fr}
@media(max-width:767px){.score .srow{grid-template-columns:1fr}}

/* Revision 9: continuous reading, with the original charts available on demand. */
.review-note.review-status{border:0;border-radius:0;padding:8px 0;margin-top:18px;font-size:11px;background:transparent}
.topic-hero>.kicker{margin-top:22px}
.topic-intro{margin-top:44px}
.life-scene{margin-top:24px;padding:18px 22px;background:var(--paper-hi);border-left:2px solid var(--line);max-width:46em}
.life-scene p.lede{font-size:16px;line-height:1.9}
.src{font-size:12px;line-height:1.7;margin:12px 0;color:var(--ink-soft)}
.src a{color:var(--stamp);text-underline-offset:4px;display:inline-flex;min-height:36px;align-items:center}
.visual-explorer{margin:22px 0;border:1px solid var(--line);border-radius:10px;background:var(--paper-hi);min-width:0;max-width:100%}
.visual-explorer>summary,.followup-questions>summary{cursor:pointer;color:var(--stamp);font-size:15px;line-height:1.7;padding:14px 18px;min-height:50px;overflow-wrap:anywhere}
.visual-explorer>summary:hover{background:var(--paper-soft)}
.explorer-content{padding:0 18px 16px;min-width:0;max-width:100%}
.explorer-content .chart-scroll{margin-top:12px}
.explorer-content .legend{font-size:12px}
.revenue-fact{border-left:3px solid var(--stamp);padding:4px 0 4px 22px;max-width:46em;margin:26px 0 20px}
.revenue-fact p.lede{color:var(--ink);margin:0}
.interactive-reading{margin-top:24px}
.interactive-reading h3{font-size:18px;font-weight:600;line-height:1.6;margin-bottom:12px}
.readout [hidden]{display:none}
.topic-library{margin-top:64px}
.topic-library [data-library]{scroll-margin-top:24px}
.followup-questions{border-top:1px solid var(--line);margin-top:34px}
.followup-questions p{padding:0 18px}
.topic-sources{margin-top:40px}
.source-website{color:var(--stamp);min-height:44px;display:inline-flex;align-items:center}
@media(max-width:767px){
 section{margin-top:48px}
 section>.kicker{margin-top:38px;padding-top:18px}
 .topic-intro{margin-top:28px}
 .life-scene{padding:14px 16px}
 .opening-scene{margin-bottom:18px}
 .visual-explorer>summary{padding:13px 14px;font-size:15px}
 .explorer-content{padding:0 12px 12px}
 .src a{min-height:44px}
 .revenue-fact{padding-left:16px}
 .interactive-reading h3{font-size:17px}
}


















/* Narrative web revision 10 */
.narrative{max-width:1000px}
.narrative .topic-hero,.narrative section{max-width:100%}
.narrative .story-copy{max-width:760px;margin-inline:0}
.narrative h1{font-size:clamp(32px,4.4vw,52px);max-width:820px;margin:24px 0 30px;line-height:1.3}
.narrative p.lede{color:var(--ink);font-size:18px;line-height:2;margin:0 0 22px;max-width:none}
.narrative .topic-hero>.kicker{max-width:760px;margin-inline:0}
.narrative section{margin-top:60px}
.narrative section>.story-copy>h2{padding-top:24px;border-top:1px solid var(--line);margin-bottom:26px}
.narrative .chapter-day{font:12px/1.6 var(--mono);color:var(--brown);margin-bottom:10px}
.narrative figure.visual-explorer{margin:28px 0 34px;padding:22px 0;border:0;border-block:1px solid var(--line);border-radius:0;background:transparent}
.narrative figure.visual-explorer figcaption h3{margin:0 0 14px;font-size:19px;line-height:1.6;color:var(--ink)}
.narrative figure .explorer-content{padding:0}
.narrative .chart-scroll{padding-bottom:16px;margin-top:12px}
.narrative .chart-text{margin-top:12px}
.narrative .chart-pan-hint{display:none}
.narrative .inline-visual>h3,.narrative .inline-visual>p{max-width:760px}
.narrative .topic-library{border-top:0;padding-top:0}
@media(max-width:767px){
 .narrative .chart-pan-hint{display:block;font:12px/1.7 var(--mono);color:var(--brown);margin:8px 0 12px}
 .narrative figure.visual-explorer{padding:18px 0;margin:24px 0}
 .narrative .chart-text[hidden]{display:none}
 .narrative .chart-text{font-size:14px}
 .narrative .chart-text ul{padding-left:20px}
 .narrative .chart-text li{margin-bottom:12px}
 .narrative .chart-scroll svg{width:1120px;min-width:1120px}
}

.narrative .inline-visual{margin:30px 0 36px}
.narrative .inline-visual h3{font-size:20px;line-height:1.5;margin:0 0 8px}
.narrative .inline-visual>p{font-size:14px;color:var(--ink-soft);margin:0 0 16px}
.product-card{border:1px solid var(--line);border-radius:10px;background:var(--paper-hi);padding:20px;min-width:0}
.product-card-header{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.product-card img{width:64px;height:64px;object-fit:contain;border-radius:14px;flex:none}
.product-card h4{font-size:20px;line-height:1.4;margin:0}
.product-card .product-day{font:12px/1.6 var(--mono);color:var(--brown);margin:0 0 3px}
.product-card p{font-size:15px;line-height:1.8;margin:0 0 12px}
.product-card a{font-size:13px;color:var(--stamp);min-height:44px;display:inline-flex;align-items:center}
.product-screen{display:grid;grid-template-columns:minmax(0,240px) minmax(0,1fr);align-items:center;gap:28px;margin:26px 0 0;padding:22px 0;border-block:1px solid var(--line)}
.product-screen img{display:block;width:100%;height:auto;border-radius:15px;border:1px solid var(--line)}
.product-screen figcaption{font-size:15px;line-height:1.8;color:var(--ink-soft)}
.product-screen figcaption strong{display:block;color:var(--ink);font-size:18px;margin-bottom:10px}
.product-screen .asset-source{display:block;font-size:12px;margin-top:14px}
.product-screen a{color:var(--stamp);text-underline-offset:3px}
.product-card .product-mark-note{font-size:11px;color:var(--ink-soft);margin-bottom:0}
@media(max-width:767px){.product-screen{grid-template-columns:1fr;gap:16px}.product-screen>a{max-width:240px;margin-inline:auto;width:100%}.product-card{padding:17px}}
.early-products{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.early-products details{border:1px solid var(--line);border-radius:8px;background:var(--paper-hi);min-width:0}
.early-products summary{cursor:pointer;padding:16px;min-height:48px;line-height:1.7;font-size:16px}
.early-products summary span{display:block;font:12px/1.7 var(--mono);color:var(--stamp)}
.early-products details p{padding:0 16px 16px;font-size:15px;line-height:1.8;margin:0}
.narrative .ending{margin-bottom:50px}
.narrative .ending p:last-child{font-size:21px;margin-top:28px}
.narrative .topic-library{border-top:1px solid var(--line);padding-top:26px}
.narrative .topic-library h2{border:0;padding:0}
.narrative .topic-sources{margin-top:36px}
@media(max-width:767px){
 .narrative h1{font-size:32px;line-height:1.35;margin-top:22px;margin-bottom:26px}
 .narrative p.lede{font-size:17px;line-height:1.95;margin-bottom:20px}
 .narrative section{margin-top:42px}
 .narrative section>.story-copy>h2{padding-top:20px;margin-bottom:22px}
 .early-products{grid-template-columns:1fr}
 .narrative .inline-visual{margin:24px 0 28px}
 .narrative .ending p:last-child{font-size:19px}
}

/* Responsive overviews and shorter reading pauses, revision 13. */
.mobile-overview,.chart-detail-toggle{display:none}
@media(min-width:768px){.narrative .original-chart svg{width:100%;min-width:0}}
.selection-feedback{font-size:14px;line-height:1.8;color:var(--stamp);margin:12px 0}
.selection-feedback a{min-height:44px;display:inline-flex;align-items:center;margin-left:8px;text-decoration:underline}
@media(max-width:767px){
 .narrative .original-chart:not(.show-chart-detail){display:none}
 .mobile-overview{display:block;margin:16px 0 10px;min-width:0}
 .mobile-overview .overview-svg{display:block;width:100%;min-width:0;max-width:100%;height:auto;margin:0;overflow:visible}
 .chart-detail-toggle,.overview-product-select{display:inline-flex;align-items:center;justify-content:center;min-height:44px;background:transparent;border:1px solid var(--line);border-radius:6px;padding:8px 12px;color:var(--stamp);font:13px/1.5 var(--mono);cursor:pointer}
 .chart-detail-toggle{margin:6px 0 8px}
 .overview-key{font-size:13px;line-height:1.7;margin:4px 0 12px}
 .overview-revenue{display:flex;width:100%;height:24px;border-radius:4px;overflow:hidden;margin:20px 0}
 .revenue-client{background:var(--stamp)}.revenue-rest{background:#b5aa91}
 .overview-revenue-label{display:flex;align-items:baseline;gap:9px;font-size:14px;line-height:1.7;margin:8px 0}
 .revenue-dot{width:9px;height:9px;background:var(--stamp);flex:none}.revenue-dot.rest{background:#b5aa91}
 .overview-row-head{display:flex;justify-content:space-between;gap:12px;font-size:13px;line-height:1.6}
 .overview-row-head strong{font-weight:500}.overview-row-head>span{white-space:nowrap;font-size:12px;color:var(--brown)}
 .overview-lane{padding:9px 0;margin:6px 0;border-radius:5px}
 .overview-lane-track{position:relative;height:10px;background:var(--paper-soft);margin-top:8px;border-radius:3px;overflow:hidden}
 .overview-lane-track span{position:absolute;height:100%;background:var(--stamp);border-radius:3px}
 .overview-interval{margin-bottom:18px}.overview-interval p{font-size:12px;line-height:1.7;margin:8px 0}
 .overview-product{padding:13px 12px;margin-bottom:10px;border:1px solid var(--line);border-radius:7px;background:var(--paper-hi)}
 .overview-product p{font-size:14px;line-height:1.8;margin:0 0 8px}
 .overview-product.is-current,.overview-lane.is-current{border:1px solid var(--stamp);background:var(--stamp-soft)}
 .overview-product-select[aria-pressed=true]{background:var(--stamp);color:var(--paper-hi)}.overview-product-link{display:inline-flex;align-items:center;min-height:44px;margin-left:10px;font-size:13px;color:var(--stamp);text-decoration:underline}.overview-product-link[hidden]{display:none}
 .product-card{padding:12px 14px}.product-card-header{gap:10px;margin-bottom:8px}.product-card img{width:44px;height:44px;border-radius:10px}.product-card h4{font-size:18px}
 .product-card p{font-size:14px;line-height:1.7;margin-bottom:5px}.product-card .product-mark-note{font-size:10px}.product-card a{min-height:36px}
 .product-screen{grid-template-columns:minmax(0,140px) minmax(0,1fr);gap:14px;padding:16px 0;margin-top:18px}
 .product-screen>a{max-width:140px}.product-screen figcaption{font-size:13px;line-height:1.7}.product-screen figcaption strong{font-size:15px;margin-bottom:6px}.product-screen .asset-source{font-size:11px;margin-top:8px}
}
/* Revision 15: use the host site's paper, ink, stamp and type system. */
.narrative{--bg:var(--paper);--fg:var(--ink);--seal:var(--stamp);--line:#d9cba9}
.narrative .story-copy{margin-left:0;margin-right:0}
.narrative .interactive-reading{border-block:1px solid var(--line);padding:24px 0;margin:32px 0}
.narrative .interactive-reading>h3{font-size:21px;line-height:1.5;margin:0 0 18px}
.narrative .interactive-reading .scrub{border:0;border-radius:0;padding:0;margin:0;background:transparent}
.narrative .scrub .row{display:flex;flex-direction:column;align-items:stretch;gap:16px}
.narrative .scrub input[type=range]{flex:none;width:100%;min-width:0;height:24px;background:linear-gradient(var(--line),var(--line)) center/100% 2px no-repeat;margin:0;accent-color:var(--stamp)}
.narrative input[type=range]:focus-visible{outline:2px solid var(--stamp);outline-offset:4px}
.narrative .readout{display:grid;grid-template-columns:1fr 2fr;gap:16px;font-size:14px}
.narrative .readout>span{min-width:0;line-height:1.8}
.narrative .readout b{display:block;color:var(--ink);font-size:17px;overflow-wrap:anywhere}
.narrative .interactive-reading .visual-explorer{border:0;margin:20px 0 0;padding:0}
.narrative .interactive-reading .visual-explorer h3{font-size:16px;color:var(--brown)}
.narrative .publication-selection{font:14px/1.8 var(--mono);color:var(--stamp);margin:14px 0}
.narrative .tip,.narrative .src{font-size:13px;line-height:1.8}
.narrative .chart-text{border:0;border-top:1px solid var(--line);border-radius:0;background:transparent;padding:12px 0}
.narrative .chart-text summary{min-height:44px;display:flex;align-items:center;cursor:pointer}
.narrative .product-card{border-radius:2px}
.narrative .product-card a{min-height:44px}
.narrative .chart-detail-toggle,.narrative .overview-product-select{border-radius:2px}
.narrative a:focus-visible,.narrative button:focus-visible{outline:2px solid var(--stamp);outline-offset:3px}
@media(max-width:767px){.narrative .readout{grid-template-columns:1fr;gap:10px}.narrative .readout b{display:inline;margin-left:8px;font-size:15px}.narrative .interactive-reading{padding:20px 0}.narrative .interactive-reading>h3{font-size:19px}}

/* Revision 18: chronological choices, native disclosure and no causal arrows. */
.narrative .choice-timeline{margin:42px 0 20px;padding-top:24px;border-top:1px solid var(--line)}
.choice-timeline>h3{font-size:24px;line-height:1.5;margin:0 0 10px}
.choice-track{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));list-style:none;margin:28px 0 0;padding:0;gap:0;align-items:start}
.choice-track>li{position:relative;border-top:1px solid var(--line);padding:22px 20px 0 0;min-width:0}
.choice-track>li:before{content:"";position:absolute;top:-5px;left:0;width:9px;height:9px;border-radius:50%;background:var(--stamp)}
.choice-track summary{cursor:pointer;list-style:none;min-height:44px}
.choice-track summary::-webkit-details-marker{display:none}
.choice-day{display:block;font:12px/1.6 var(--mono);color:var(--brown);margin-bottom:10px}
.choice-title{display:block;font-size:19px;line-height:1.5;margin-bottom:12px}
.choice-action{display:block;font-size:15px;line-height:1.8;color:var(--ink-soft)}
.choice-toggle{display:inline-flex;align-items:center;min-height:44px;font-size:13px;color:var(--stamp);gap:8px}
.choice-toggle:before{content:"+";font-family:var(--mono)}
.choice-track details[open] .choice-toggle:before{content:"−"}
.choice-track summary:focus-visible{outline:2px solid var(--stamp);outline-offset:5px}
.choice-detail{padding-top:10px;border-top:1px solid var(--line)}
.choice-detail h4{font-size:13px;color:var(--brown);font-weight:400;margin:12px 0 6px}
.choice-detail p{font-size:15px;line-height:1.8;margin:0 0 14px}
.choice-detail .src a{display:inline-block;min-height:44px;line-height:44px;font-size:12px}
@media(max-width:767px){
 .choice-track{display:block;margin-left:4px}
 .choice-track>li{border-top:0;border-left:1px solid var(--line);padding:0 0 24px 22px}
 .choice-track>li:before{top:5px;left:-5px}
 .choice-track>li:last-child{border-left-color:transparent;padding-bottom:0}
 .choice-day{margin-bottom:5px}.choice-title{margin-bottom:8px}
 .choice-timeline>h3{font-size:21px}
}

/* Revision 19: concise retrospective advice, all ten items visible. */
.narrative .advice-list{padding-left:1.7em;margin:22px 0 24px}
.narrative .advice-list li{padding-left:.4em;margin-bottom:13px;font-size:17px;line-height:1.85}
.narrative .advice-list li::marker{color:var(--stamp);font-family:var(--mono);font-size:13px}