:root{--ink:#13251c;--paper:#f4f0e6;--paper-2:#fffdf7;--signal:#f05727;--acid:#d5ff46;--line:rgba(19,37,28,.22);--serif:"Songti SC","STSong","SimSun",serif;--sans:"PingFang SC","Microsoft YaHei",sans-serif;--mono:"SFMono-Regular",Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);line-height:1.7}.case-header{min-height:72px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);font-size:13px}.case-brand{display:flex;gap:10px;align-items:center;color:inherit;text-decoration:none;font-weight:700}.case-brand b{display:grid;place-items:center;width:28px;height:28px;background:var(--ink);color:var(--acid);font-family:var(--mono)}.case-nav{display:flex;gap:24px}.case-nav a,.case-header>a{color:inherit;text-decoration:none}.case-header>a:last-child{border-bottom:1px solid currentColor}.case-shell{max-width:1320px;margin:auto;padding:0 5vw}.case-hero{padding:10vh 0 8vh;display:grid;grid-template-columns:1.5fr .75fr;gap:7vw;align-items:end;border-bottom:2px solid var(--ink)}.case-kicker,.case-stamp,.case-number{font:700 11px/1.4 var(--mono);letter-spacing:.11em;text-transform:uppercase}.case-kicker,.case-number{color:var(--signal)}.case-hero h1{font:600 clamp(3.2rem,7vw,7.5rem)/.98 var(--serif);letter-spacing:-.07em;margin:22px 0}.case-hero h1 em{font-style:normal;color:var(--signal)}.case-lede{max-width:760px;font-size:clamp(1rem,1.5vw,1.25rem)}.case-proof{border:1px solid var(--ink);background:var(--paper-2);padding:24px}.case-proof strong{display:block;font:600 2rem/1.15 var(--serif);margin:28px 0 12px}.case-proof p{font-size:13px;margin:0}.case-lanes{display:grid;grid-template-columns:repeat(3,1fr);margin:50px 0;border-top:1px solid var(--line);border-left:1px solid var(--line)}.case-lanes article{padding:26px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:210px}.case-lanes h2{font:600 2rem/1.1 var(--serif);margin:34px 0 12px}.case-lanes a{font:700 12px var(--mono);color:inherit}.case-section{padding:7vh 0}.case-section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:32px}.case-section h2{font:600 clamp(2.4rem,5vw,5rem)/1 var(--serif);letter-spacing:-.055em;margin:0}.case-filters{display:flex;gap:8px;flex-wrap:wrap}.case-filters button{border:1px solid var(--ink);background:transparent;color:inherit;padding:10px 14px;font:700 12px var(--sans);cursor:pointer}.case-filters button[aria-pressed="true"]{background:var(--ink);color:var(--paper)}.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-left:1px solid var(--line)}.scenario-card{padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column;min-height:470px;background:var(--paper-2)}.scenario-card[hidden]{display:none}.scenario-card h3{font:600 2.1rem/1.12 var(--serif);letter-spacing:-.045em;margin:45px 0 14px}.scenario-card p{font-size:15px}.case-badges{display:flex;gap:6px;flex-wrap:wrap;margin:18px 0}.case-badges span{padding:5px 7px;background:#e9e4d8;font:700 10px var(--mono)}.scenario-card a{margin-top:auto;background:var(--ink);color:var(--paper);padding:14px 16px;text-decoration:none;font-weight:700}.case-callout{background:var(--ink);color:var(--paper);padding:7vh 6vw;margin:30px 0 80px;display:grid;grid-template-columns:1.3fr .7fr;gap:8vw;align-items:end}.case-callout h2{font:600 clamp(2.5rem,5vw,5rem)/1 var(--serif);margin:0}.case-callout p{max-width:580px}.case-actions{display:flex;gap:10px;flex-wrap:wrap}.case-button{display:inline-flex;justify-content:space-between;gap:26px;border:1px solid currentColor;padding:14px 17px;color:inherit;text-decoration:none;font-weight:700}.case-button.primary{background:var(--signal);color:#1b160f;border-color:var(--signal)}.case-footer{padding:32px 5vw;background:var(--ink);color:var(--paper);display:flex;justify-content:space-between;gap:20px;font:11px var(--mono)}
.dossier-hero{padding:8vh 0 6vh;border-bottom:2px solid var(--ink)}.dossier-meta{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}.dossier-meta span{font:700 11px var(--mono)}.dossier-hero h1{font:600 clamp(3rem,6.5vw,6.6rem)/.98 var(--serif);letter-spacing:-.065em;margin:35px 0 24px;max-width:1100px}.dossier-hero>p{font-size:clamp(1rem,1.5vw,1.2rem);max-width:780px}.dossier-status{display:flex;gap:8px;flex-wrap:wrap;margin-top:24px}.dossier-status span{padding:7px 9px;background:var(--ink);color:var(--paper);font:700 11px var(--mono)}.dossier-status span:last-child{background:#dfead9;color:var(--ink)}.dossier-grid{display:grid;grid-template-columns:260px 1fr;gap:6vw;padding:7vh 0}.dossier-index{position:sticky;top:24px;align-self:start;border-top:2px solid var(--ink)}.dossier-index a{display:block;padding:10px 0;border-bottom:1px solid var(--line);color:inherit;text-decoration:none;font-size:13px}.dossier-content section{padding:0 0 55px;margin-bottom:55px;border-bottom:1px solid var(--line)}.dossier-content h2{font:600 clamp(2rem,4vw,3.8rem)/1.05 var(--serif);letter-spacing:-.05em;margin:0 0 24px}.dossier-content h3{font:600 1.45rem var(--serif);margin:20px 0 8px}.dossier-content p,.dossier-content li{font-size:16px;max-width:820px}.data-sample{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}.data-sample div{padding:18px;background:var(--paper-2);border:1px solid var(--line)}.data-sample b,.workflow-step b{display:block;font:700 11px var(--mono);color:var(--signal);margin-bottom:7px}.workflow{display:grid;grid-template-columns:repeat(5,1fr);border-top:1px solid var(--ink);border-left:1px solid var(--ink)}.workflow-step{padding:18px;min-height:170px;border-right:1px solid var(--ink);border-bottom:1px solid var(--ink)}.workflow-step strong{font:600 1.25rem/1.2 var(--serif)}.workflow-step p{font-size:13px}.review-gate{padding:28px;background:var(--acid);border-left:8px solid var(--ink)}.output-list,.metric-grid,.delivery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.output-list article,.metric-grid article,.delivery-grid article{padding:20px;background:var(--paper-2);border:1px solid var(--line)}.output-list h3,.metric-grid h3,.delivery-grid h3{margin-top:0}.metric-grid strong{display:block;font:600 2rem var(--serif)}.boundary{display:grid;grid-template-columns:1fr 1fr}.boundary>div{padding:28px;background:#e0ead9}.boundary>div:last-child{background:#efc6b8}.demo-script{counter-reset:demo;list-style:none;padding:0}.demo-script li{counter-increment:demo;display:grid;grid-template-columns:55px 1fr;padding:16px 0;border-bottom:1px solid var(--line)}.demo-script li:before{content:"0" counter(demo);font:700 11px var(--mono);color:var(--signal)}.plan-30{display:grid;grid-template-columns:repeat(4,1fr)}.plan-30 article{padding:20px;border-top:1px solid var(--ink);border-right:1px solid var(--ink)}.plan-30 article:first-child{border-left:1px solid var(--ink)}.evidence-note{padding:28px;background:var(--ink);color:var(--paper)}.evidence-note strong{color:var(--acid)}
@media(max-width:900px){.case-hero,.case-callout,.dossier-grid{grid-template-columns:1fr}.case-lanes,.scenario-grid{grid-template-columns:1fr}.dossier-index{position:static;display:none}.workflow{grid-template-columns:1fr}.workflow-step{min-height:auto}.output-list,.metric-grid,.delivery-grid,.plan-30{grid-template-columns:1fr 1fr}.case-nav{display:none}}@media(max-width:520px){.case-header{padding:0 5vw}.case-shell{padding:0 5vw}.case-hero{padding-top:7vh}.case-hero h1,.dossier-hero h1{font-size:2.85rem}.case-section-head{align-items:flex-start;flex-direction:column}.case-lanes{margin-top:30px}.scenario-card{min-height:390px}.data-sample,.output-list,.metric-grid,.delivery-grid,.plan-30,.boundary{grid-template-columns:1fr}.case-callout{margin-bottom:40px}.case-footer{flex-direction:column}.case-button{width:100%}}