:root{--paper:#f4efe5;--paper2:#ebe0cd;--ink:#10263a;--orange:#c94f2d;--gold:#b77932;--line:#cfbea2;--white:#fffaf1}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--ink);font-family:"Noto Sans SC","Microsoft YaHei",system-ui,sans-serif}
body:before{content:"";position:fixed;inset:0;pointer-events:none;opacity:.18;z-index:20;background-image:url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.18'/%3E%3C/svg%3E")}
a{color:inherit;text-decoration:none}
.site-header{height:78px;padding:0 4.2vw;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);position:absolute;z-index:10;width:100%}
.brand{display:flex;align-items:center;gap:13px}.brand-po{font:700 42px/1 Georgia,serif;letter-spacing:-3px}.brand-rule{width:1px;height:34px;background:var(--orange)}.brand-copy{font-size:11px;letter-spacing:.3em;font-weight:700}
nav{display:flex;gap:34px;font-size:13px;font-weight:700}nav a{padding:28px 0 24px;border-bottom:2px solid transparent}nav a:hover,nav a:focus{color:var(--orange);border-color:var(--orange)}
.hero{min-height:100vh;padding:120px 4.2vw 38px;display:grid;grid-template-columns:53% 47%;grid-template-rows:1fr auto;overflow:hidden}
.hero-copy{padding:4vh 3vw 3vh 0;position:relative;z-index:2}.eyebrow{font:700 17px/1.2 Georgia,"Noto Serif SC",serif;color:var(--orange);letter-spacing:.08em}.hero h1{font-family:"Noto Serif SC","Songti SC",SimSun,serif;font-size:clamp(54px,5.2vw,86px);line-height:1.06;letter-spacing:-.045em;margin:28px 0 34px}.lead{font-size:clamp(18px,1.35vw,23px);line-height:1.7;max-width:680px}.hero-badges{display:flex;gap:12px;margin:34px 0}.hero-badges span{border:1px solid var(--line);border-radius:7px;padding:15px 18px;background:#fff4df80;font-size:14px}.hero-badges b{color:var(--orange);margin-right:6px}.primary-link{display:inline-flex;gap:20px;align-items:center;font-weight:800;border-bottom:1px solid var(--ink);padding:10px 0}.primary-link span{color:var(--orange)}
.hero-art{position:relative;min-height:580px;display:flex;align-items:center;justify-content:center}.hero-art:before{content:"";position:absolute;height:74%;width:2px;background:var(--orange);left:44%;top:12%;z-index:2}.hero-art:after{content:"";position:absolute;width:11px;height:11px;background:var(--orange);left:calc(44% - 5px);top:54%;z-index:3}.hero-art-backdrop{position:absolute;inset:10% -10% 8% 8%;background:repeating-linear-gradient(90deg,transparent 0 44px,#c9b18e30 45px 46px),linear-gradient(135deg,#e3d5bd80,transparent 65%)}.hero-art img{width:116%;max-width:none;transform:translateX(5%);position:relative;z-index:1;mix-blend-mode:multiply}.art-caption{position:absolute;right:2%;bottom:12%;z-index:4;background:var(--ink);color:var(--white);padding:20px 24px;display:grid}.art-caption span{font-size:10px;letter-spacing:.35em;color:#d9a36c}.art-caption strong{font:700 20px/1.2 Georgia,serif;letter-spacing:.12em}.art-caption small{margin-top:8px;color:#cbd2d4}
.logic-strip{grid-column:1/-1;border-top:1px solid var(--line);border-bottom:1px solid var(--line);display:grid;grid-template-columns:repeat(4,1fr);min-height:110px}.logic-step{display:flex;align-items:center;gap:15px;padding:20px 2.5vw;position:relative;border-right:1px solid var(--line)}.logic-step:last-child{border:0}.logic-step span{font:700 13px Georgia;color:var(--orange)}.logic-step strong{font:700 22px "Noto Serif SC","Songti SC",serif}.logic-step i{position:absolute;right:-10px;background:var(--paper);color:var(--orange);font-size:24px;font-style:normal;z-index:2}
.section{padding:110px 6vw;scroll-margin-top:0}.section-kicker{color:var(--orange);letter-spacing:.18em;font:700 12px/1 Georgia;border-top:2px solid var(--orange);padding-top:12px;width:max-content}.section-heading{display:grid;grid-template-columns:1.15fr .85fr;gap:8vw;margin:34px 0 65px;align-items:end}.section-heading h2{font:700 clamp(40px,4vw,68px)/1.15 "Noto Serif SC","Songti SC",serif;margin:0;letter-spacing:-.04em}.section-heading p{font-size:17px;line-height:1.9;margin:0}
.gap-grid{display:grid;grid-template-columns:1fr 270px 1fr;gap:26px;align-items:stretch}.gap-grid article{border:1px solid var(--line);padding:38px;background:#fff9ed80}.gap-grid article span{font-size:12px;color:var(--orange);font-weight:800;letter-spacing:.16em}.gap-grid article strong{display:block;font:700 23px/1.5 "Noto Serif SC","Songti SC",serif;margin:20px 0 12px}.gap-grid article p{line-height:1.8;color:#52606b}.gap-center{background:var(--orange);color:white;padding:32px;text-align:center;display:flex;flex-direction:column;justify-content:center}.gap-center small{letter-spacing:.18em}.gap-center strong{font:700 28px/1.35 "Noto Serif SC","Songti SC",serif;margin:20px 0}.gap-center i{font-style:normal;font-size:13px;border-top:1px solid #ffffff70;padding-top:12px}.origin blockquote{font:700 clamp(25px,2.2vw,38px)/1.5 "Noto Serif SC","Songti SC",serif;text-align:center;margin:70px auto 0;max-width:900px}
.business{background:var(--ink);color:var(--white)}.light{color:#dc875d}.service-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #ffffff30;border-left:1px solid #ffffff30}.service-grid article{min-height:240px;padding:32px;border-right:1px solid #ffffff30;border-bottom:1px solid #ffffff30;transition:.2s}.service-grid article:hover{background:#ffffff09;transform:translateY(-3px)}.service-grid span{color:#dc875d;font:700 12px Georgia}.service-grid h3{font:700 25px "Noto Serif SC","Songti SC",serif;margin:28px 0 16px}.service-grid p{color:#c5cdd2;line-height:1.75;margin:0}
.model-flow{display:grid;grid-template-columns:1fr 60px 1.25fr 60px 1fr;align-items:center}.model-flow article{border:1px solid var(--line);min-height:215px;padding:36px;background:#fff9ed80}.model-flow article span{color:var(--orange);font:700 11px Georgia;letter-spacing:.18em}.model-flow article strong{display:block;font:700 26px "Noto Serif SC","Songti SC",serif;margin:25px 0 12px}.model-flow article p{line-height:1.7;color:#55616b}.model-flow>i{text-align:center;font-style:normal;color:var(--orange);font-size:29px}.model-flow .model-core{background:var(--orange);color:#fff;border-color:var(--orange)}.model-flow .model-core span,.model-flow .model-core p{color:#fff}
.tension{margin-top:60px;background:var(--paper2);padding:40px;display:grid;grid-template-columns:1fr 80px 1fr 1.25fr;align-items:center;gap:25px}.tension div{padding:8px 25px}.tension small{display:block;color:var(--orange);font-weight:800;margin-bottom:15px}.tension strong{font:700 22px/1.6 "Noto Serif SC","Songti SC",serif}.tension>span{text-align:center;font:700 46px Georgia;color:var(--orange)}.tension>p{border-left:1px solid var(--line);padding-left:35px;line-height:1.9}
.timeline-section{background:#eadfcd}.timeline{display:grid;grid-template-columns:repeat(4,1fr);position:relative}.timeline:before{content:"";position:absolute;left:0;right:0;top:63px;height:2px;background:var(--line)}.timeline article{padding-right:34px;position:relative}.timeline article>span{font:700 clamp(38px,4vw,64px)/1 Georgia;color:var(--orange)}.timeline article i{display:block;width:13px;height:13px;background:var(--orange);border:3px solid #eadfcd;border-radius:50%;outline:1px solid var(--orange);margin:18px 0 35px;position:relative;z-index:2}.timeline h3{font:700 23px "Noto Serif SC","Songti SC",serif}.timeline p{line-height:1.8;color:#4c5b66}.acquisition{margin-top:80px;padding:40px;background:var(--ink);color:white;display:grid;grid-template-columns:1fr 60px 1fr 60px 1.15fr;align-items:center}.acquisition div{padding:15px 26px}.acquisition small{color:#dc875d;display:block;margin-bottom:15px}.acquisition strong{font:700 20px/1.6 "Noto Serif SC","Songti SC",serif}.acquisition>span{text-align:center;color:#dc875d;font-size:38px}.acquisition .result{background:var(--orange);padding:30px}
.discussion{text-align:center;background:var(--orange);color:white}.discussion .eyebrow{color:#ffd7c8}.discussion h2{font:700 clamp(44px,5vw,76px)/1.25 "Noto Serif SC","Songti SC",serif;margin:28px auto 60px}.question-grid{display:grid;grid-template-columns:repeat(3,1fr);text-align:left;border-top:1px solid #ffffff55;border-left:1px solid #ffffff55}.question-grid article{padding:30px;border-right:1px solid #ffffff55;border-bottom:1px solid #ffffff55;min-height:170px}.question-grid span{font:700 12px Georgia;color:#ffd7c8}.question-grid p{font:700 18px/1.7 "Noto Serif SC","Songti SC",serif}
footer{background:#091c2d;color:#d3dade;padding:45px 6vw;display:flex;justify-content:space-between;align-items:center}footer>div:first-child{display:grid;gap:6px}footer strong{color:white}.sources{display:flex;gap:18px;font-size:12px}.sources a{color:#dc875d;border-bottom:1px solid transparent}.sources a:hover{border-color:#dc875d}
@media(max-width:900px){nav{display:none}.hero{grid-template-columns:1fr;padding-top:100px}.hero-art{min-height:420px}.logic-strip{grid-template-columns:1fr 1fr}.logic-step:nth-child(2){border-right:0}.section{padding:80px 6vw}.section-heading{grid-template-columns:1fr;gap:30px}.gap-grid{grid-template-columns:1fr}.service-grid{grid-template-columns:1fr 1fr}.model-flow{grid-template-columns:1fr}.model-flow>i{transform:rotate(90deg);padding:12px}.tension{grid-template-columns:1fr}.tension>p{border-left:0;border-top:1px solid var(--line);padding:25px 0 0}.timeline{grid-template-columns:1fr 1fr;gap:50px}.timeline:before{display:none}.acquisition{grid-template-columns:1fr}.question-grid{grid-template-columns:1fr}footer{gap:30px;align-items:flex-start;flex-direction:column}}
@media(max-width:560px){.hero{padding-left:20px;padding-right:20px}.hero h1{font-size:47px}.hero-badges{flex-direction:column}.logic-strip{grid-template-columns:1fr}.logic-step{border-right:0;border-bottom:1px solid var(--line)}.service-grid,.timeline{grid-template-columns:1fr}.section-heading h2{font-size:40px}.sources{flex-wrap:wrap}.hero-art{min-height:340px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.service-grid article{transition:none}}

/* PO explainer additions */
.definition{padding:48px 6vw;background:var(--ink);color:var(--white);display:grid;grid-template-columns:1fr 60px 1fr 1fr;align-items:center;gap:28px}.definition-name{display:grid;gap:8px}.definition-name>span{font:700 44px/1 Georgia,"Noto Serif SC",serif;color:#dc875d}.definition-name strong{font:700 18px/1.4 "Noto Serif SC","Songti SC",serif}.definition-name small,.definition-note{color:#bfc8ce;line-height:1.7}.definition-plus{font:300 38px/1 Georgia;color:#dc875d;text-align:center}.definition-note{border-left:1px solid #ffffff35;padding-left:32px}.definition-note strong{color:white}.origin-note{max-width:900px;margin:25px auto 0;text-align:center;color:#52606b;line-height:1.9}.works{margin-top:36px;display:flex;gap:14px;align-items:center;flex-wrap:wrap}.works span{color:#dc875d;font-size:12px;letter-spacing:.16em;font-weight:800;margin-right:12px}.works strong{font:600 15px/1 "Noto Serif SC",serif;border:1px solid #ffffff35;padding:13px 18px}.capability-line{margin-top:28px;border:1px solid var(--line);padding:24px;display:flex;gap:16px;justify-content:center;align-items:center;flex-wrap:wrap}.capability-line span{color:#68737b;margin-right:8px}.capability-line strong{font:700 16px "Noto Serif SC",serif}.capability-line i{font-style:normal;color:var(--orange)}.conclusion{text-align:center;background:var(--orange);color:white}.conclusion .eyebrow{color:#ffd7c8}.conclusion h2{font:700 clamp(44px,5vw,76px)/1.15 "Noto Serif SC","Songti SC",serif;margin:26px 0}.conclusion>p:last-child{max-width:1000px;margin:0 auto;font:600 clamp(20px,2vw,30px)/1.8 "Noto Serif SC","Songti SC",serif}
@media(max-width:900px){.definition{grid-template-columns:1fr 40px 1fr}.definition-note{grid-column:1/-1;border-left:0;border-top:1px solid #ffffff35;padding:24px 0 0}}
@media(max-width:560px){.definition{grid-template-columns:1fr;padding:40px 24px}.definition-plus{text-align:left}}