:root{--ink:#102435;--muted:#607386;--paper:#f5f9fa;--white:#fff;--line:#cbdbe1;--line-dark:#9db5bf;--mist:#e5f1f5;--pale:#edf6f8;--blue:#216d91;--blue-deep:#174d6b;--aqua:#7fc7dc;--lichen:#6f7d68;--lichen-pale:#e5ebe1;--wool:#ddd9cf;--cotton:#cfdce1;--synthetic:#9bbac5;--side:250px;--radius:2px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--paper);font-family:"Taipei Sans TC",system-ui,sans-serif;font-size:16px;line-height:1.72;letter-spacing:.01em}
.skip-link{position:fixed;left:16px;top:-70px;background:#fff;padding:8px 12px;z-index:20}
.skip-link:focus{top:16px}
a{color:inherit}
.rail{position:fixed;inset:0 auto 0 0;width:var(--side);padding:34px 28px 24px;border-right:1px solid var(--line);background:rgba(245,249,250,.92);backdrop-filter:blur(12px);z-index:9;display:flex;flex-direction:column}
.rail-mark{font-weight:700;font-size:20px;text-decoration:none;letter-spacing:-.05em}
.rail-mark span{color:var(--blue);font-size:15px}
.chapter-nav{display:flex;flex-direction:column;gap:10px;margin-top:16vh}
.chapter-nav a{display:grid;grid-template-columns:12px 23px auto;align-items:center;gap:8px;color:#78909c;text-decoration:none;font-size:12px;letter-spacing:.015em;transition:color .3s}
.chapter-nav a i{width:5px;height:5px;border:1px solid #91aeb9;border-radius:50%;display:block}
.chapter-nav a span{font-variant-numeric:tabular-nums;color:#93aab5}
.chapter-nav a.active{color:var(--ink)}
.chapter-nav a.active i{border-color:var(--blue);background:var(--blue);box-shadow:0 0 0 4px rgba(33,109,145,.1)}
.rail-end{margin-top:auto;color:#8aa0aa;font-size:10px;line-height:1.5;text-transform:uppercase;letter-spacing:.09em}
.mobile-header{display:none}
main{margin-left:var(--side)}
.hero{height:100vh;min-height:680px;position:relative;isolation:isolate;display:flex;align-items:flex-end;padding:7vw;overflow:hidden;background:#0e3449}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(6,28,40,.62),rgba(6,28,40,.08) 65%),linear-gradient(0deg,rgba(8,35,48,.35),transparent 45%);z-index:-1}
.hero-copy{max-width:780px;color:#fff;padding-bottom:5vh}
.eyebrow{font-size:11px;line-height:1.2;letter-spacing:.13em;color:var(--lichen);font-weight:700;margin:0 0 20px;text-transform:uppercase}
.eyebrow.light{color:#d8f1f6}
.hero h1{font-size:clamp(50px,7vw,105px);line-height:1.03;letter-spacing:-.07em;margin:0;font-weight:700}
.hero-sub{font-size:17px;line-height:1.6;margin:27px 0 0;color:#dcecf0}
.scroll-cue{position:absolute;bottom:33px;left:7vw;font-size:12px;color:#e5f1f5;text-decoration:none}
.scroll-cue span{display:inline-block;margin-left:10px;font-size:16px;animation:down 2s infinite}
.asset-label{position:absolute;right:28px;bottom:28px;font-size:9px;letter-spacing:.08em;margin:0;opacity:.75}
.chapter{position:relative;padding:13vw 9vw;border-bottom:1px solid var(--line);scroll-margin-top:24px}
.section-index{position:absolute;right:32px;top:30px;color:#8b9a82;font-size:11px;letter-spacing:.08em}
.measure{max-width:700px}
.measure-wide{max-width:900px}
.chapter h2{font-size:clamp(36px,4.5vw,68px);line-height:1.16;letter-spacing:-.065em;margin:0 0 28px;font-weight:700}
.lead{font-size:20px;line-height:1.75;color:#375061;margin:0}
.definition-points{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin-top:100px}
.definition-points article{padding:30px 26px 28px 0;min-height:180px}
.definition-points article+article{border-left:1px solid var(--line);padding-left:26px}
.definition-points span{font-size:28px;letter-spacing:-.05em;font-weight:700;color:var(--lichen)}
.definition-points p{font-size:14px;line-height:1.75;margin:12px 0 0;color:#536b78}
.claim-note,.balanced-callout{display:flex;gap:28px;margin-top:30px;padding:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);color:#526a76;font-size:13px}
.claim-note b,.balanced-callout b{flex:0 0 145px;font-size:10px;letter-spacing:.1em;color:var(--blue-deep)}
.claim-note span,.balanced-callout p{margin:0}
.split-section{background:#fff}
.fineness-visual{margin:80px 0 18px;min-height:310px;display:grid;grid-template-columns:1fr 80px 1fr;align-items:end;gap:4vw;padding:30px 4vw;background:linear-gradient(180deg,#fbfdfe,#eff6f7);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.fineness-side{text-align:center;min-height:245px;position:relative;padding-top:35px}
.fineness-side b{font-size:16px;display:block;line-height:1.45}
.fineness-side p{font-size:12px;color:#627985;margin:10px auto 0;max-width:160px;line-height:1.5}
.fiber-loop{display:inline-block;width:17px;height:124px;border:2px solid var(--blue);border-radius:50%;transform:rotate(23deg);margin:0 -3px 13px}
.coarse .fiber-loop{width:28px;border-width:5px;border-color:#738995;transform:rotate(10deg);margin:0 -5px 13px}
.skin-line{height:9px;border-radius:99px;background:#d9c9c2;position:relative;margin-bottom:68px}
.skin-line span{position:absolute;top:17px;left:50%;translate:-50%;color:#9a8179;font-size:11px;white-space:nowrap}
.caption{font-size:11px;line-height:1.6;color:#718893;margin:0}
.source-drawer{margin-top:38px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);font-size:13px}
.source-drawer summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;align-items:center;padding:16px 0;color:var(--blue-deep)}
.source-drawer summary::-webkit-details-marker{display:none}
.source-drawer summary span:before{content:"+";margin-right:10px}
.source-drawer[open] summary span:before{content:"−"}
.source-drawer em{font-size:10px;font-style:normal;letter-spacing:.08em;color:#8098a3}
.source-drawer>div{padding:0 0 17px;color:#536b78}
.source-drawer p{margin:0 0 10px}
.source-drawer a,.honesty-card a,.evidence-columns a,.evidence-register a{color:var(--blue-deep);text-underline-offset:3px}
.temperature{background:var(--mist)}
.thermal-story{display:grid;grid-template-columns:repeat(3,1fr);gap:36px;margin-top:90px}
.thermal-step{border-top:1px solid var(--line-dark);padding-top:18px}
.thermal-step .time{font-size:11px;color:var(--blue);font-weight:700}
.thermal-step h3{font-size:18px;margin:19px 0 6px}
.thermal-step p{font-size:14px;line-height:1.7;color:#546c78;margin:0}
.weather{width:78px;height:78px;margin:28px 0;border:1px solid #83b1c0;border-radius:50%;position:relative}
.weather.sun:before{content:"";position:absolute;width:21px;height:21px;border:2px solid var(--blue);border-radius:50%;left:27px;top:27px;box-shadow:0 -19px 0 -8px var(--blue),0 19px 0 -8px var(--blue),19px 0 0 -8px var(--blue),-19px 0 0 -8px var(--blue)}
.weather.transit:before,.weather.transit:after{content:"";position:absolute;left:16px;right:16px;border-top:1px solid var(--blue);transform:rotate(-25deg)}
.weather.transit:before{top:26px}
.weather.transit:after{top:46px}
.weather.cool:before{content:"";position:absolute;inset:19px;background:linear-gradient(45deg,transparent 46%,var(--blue) 47% 53%,transparent 54%),linear-gradient(-45deg,transparent 46%,var(--blue) 47% 53%,transparent 54%)}
.term-grid{display:grid;grid-template-columns:repeat(4,1fr);margin-top:75px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.term-grid article{min-height:114px;padding:20px}
.term-grid article+article{border-left:1px solid var(--line)}
.term-grid b{font-size:17px;display:block}
.term-grid span{font-size:12px;color:#69808b;line-height:1.5;display:block;margin-top:6px}
.pre-sweat-panel{margin:70px 0 0;display:grid;grid-template-columns:1.1fr .9fr;align-items:stretch;background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.pre-sweat-panel img{width:100%;height:390px;object-fit:cover}
.pre-sweat-panel>div{padding:48px;display:flex;flex-direction:column;justify-content:center}
.pre-sweat-panel h3{font-size:27px;line-height:1.35;letter-spacing:-.045em;margin:0 0 20px}
.pre-sweat-panel p{font-size:14px;line-height:1.8;color:#526b77;margin:0}
.pre-sweat-panel .visual-note{font-size:10px;letter-spacing:.06em;color:#8aa0aa;margin-top:25px}
.three-routes{display:grid;grid-template-columns:repeat(3,1fr);margin-top:80px;gap:16px}
.route{background:#fff;padding:27px 25px 24px;border:1px solid var(--line);min-height:360px}
.route-no{font-size:11px;color:var(--blue);font-weight:700}
.route h3{font-size:20px;line-height:1.3;margin:13px 0}
.route p{font-size:14px;line-height:1.75;color:#4c6571;margin:19px 0 10px}
.route small{font-size:11px;color:#718a95;line-height:1.55}
.route-fiber{height:64px;display:flex;gap:8px;align-items:center}
.route-fiber i{height:58px;width:10px;display:block;border:1.5px solid #778f9a;border-radius:50%}
.wool-fiber i{border-color:var(--blue);transform:rotate(21deg)}
.cotton-fiber i{height:52px;border-radius:47% 53% 42% 58%;border-color:#9caeb6;transform:rotate(36deg)}
.coolmax-fiber i{height:50px;border-radius:1px;clip-path:polygon(0 0,100% 0,72% 38%,100% 100%,0 100%,28% 58%);border-color:#668d9d}
.evidence-block{margin-top:100px;background:#102f40;color:#eff8fa;padding:55px}
.evidence-block .eyebrow{color:#8fd6e8}
.evidence-block h3{font-size:28px;line-height:1.35;margin:0;max-width:700px;letter-spacing:-.04em}
.buffer-bars{margin:50px 0 20px;display:grid;gap:19px}
.buffer-bars div{display:grid;grid-template-columns:100px 75px 1fr;gap:15px;align-items:center}
.buffer-bars span{font-size:13px;color:#c1d9df}
.buffer-bars b{font-size:20px;color:#fff}
.buffer-bars i{height:12px;background:linear-gradient(90deg,#5eaec4,#a5e1eb);display:block;width:var(--bar);min-width:30px;transition:width 1s}
.method-note{font-size:11px;line-height:1.65;color:#b9d0d6;margin:28px 0 0;max-width:780px}
.evidence-block .source-drawer{border-color:#527084;margin-top:28px}
.evidence-block .source-drawer summary,.evidence-block .source-drawer a{color:#b7e6ef}
.evidence-block .source-drawer>div{color:#d1e3e7}
.honesty-card{margin:34px 0 0;padding:35px 40px;background:#d8eaf0;border-left:3px solid var(--blue)}
.honesty-card .eyebrow{margin-bottom:12px}
.honesty-card h3{font-size:24px;line-height:1.35;margin:0 0 13px;letter-spacing:-.04em}
.honesty-card p{font-size:14px;color:#435d69;max-width:800px;margin:0}
.honesty-card a{font-size:12px;display:inline-block;margin-top:15px}
.odor{background:#fff}
.odor-scene{margin-top:78px;display:grid;grid-template-columns:260px 1fr;gap:56px;align-items:center;padding:40px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.person{height:230px;position:relative;margin:auto;width:160px}
.head{position:absolute;width:52px;height:52px;border:2px solid var(--blue-deep);border-radius:50%;left:54px;top:5px}
.body{position:absolute;width:108px;height:142px;border:2px solid var(--blue-deep);border-radius:52px 52px 20px 20px;left:26px;bottom:0}
.sweat{position:absolute;width:10px;height:14px;border:1.5px solid var(--blue);border-radius:100% 0 100% 100%;rotate:45deg;animation:drip 2.7s infinite}
.s1{left:17px;top:70px}
.s2{right:10px;top:110px;animation-delay:.7s}
.s3{left:8px;bottom:22px;animation-delay:1.3s}
.scene-copy h3{font-size:29px;line-height:1.35;letter-spacing:-.05em;margin:0 0 13px}
.scene-copy p:not(.eyebrow){font-size:14px;color:#59717c;max-width:530px;margin:0}
.odor-routes{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:45px}
.odor-card{padding:28px 25px;background:var(--paper);border-top:2px solid var(--line-dark)}
.odor-card:nth-child(2){background:#f8fbfc}
.odor-card.wool{background:#e7f3f6;border-color:var(--blue)}
.odor-card>span{font-size:11px;color:var(--blue)}
.odor-card h3{font-size:20px;margin:12px 0 18px}
.odor-card p{font-size:13px;color:#506975;line-height:1.75;margin:18px 0 8px}
.odor-card small{font-size:11px;color:#738a94;line-height:1.5}
.odor-line{height:35px;display:flex;gap:8px;align-items:center}
.odor-line i{width:13px;height:13px;border:1.5px solid #738d98;border-radius:50%;position:relative}
.odor-line i:after{content:"";position:absolute;left:12px;top:5px;width:13px;border-top:1px solid #8ba2ac}
.odor-card.wool .odor-line i{border-color:var(--blue);background:rgba(127,199,220,.28)}
.odor-card.wool .odor-line i:after{border-color:var(--blue)}
.evidence-columns{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:76px}
.evidence-columns article{padding:33px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.evidence-columns h3{font-size:23px;line-height:1.38;margin:0 0 15px;letter-spacing:-.04em}
.evidence-columns p:not(.eyebrow){font-size:13px;color:#556e79;margin:0}
.evidence-columns a{font-size:12px;display:inline-block;margin-top:16px}
.recovery{background:var(--mist)}
.recovery-sequence{display:grid;grid-template-columns:repeat(3,1fr);gap:25px;margin-top:90px}
.recovery-sequence article{padding:28px 0;border-top:1px solid var(--line-dark)}
.recovery-sequence article>span{font-size:11px;color:var(--blue);font-weight:700}
.recovery-sequence h3{font-size:22px;margin:22px 0 8px}
.recovery-sequence p{font-size:13px;color:#5b737e;margin:0;line-height:1.65}
.yarn{height:116px;display:flex;align-items:center;justify-content:center;gap:0;padding:20px 0}
.yarn i{display:block;width:18px;height:64px;border:2px solid var(--blue-deep);border-radius:50%;margin:-4px}
.yarn-stretched i{height:8px;border-radius:99px;margin:-1px;width:28px;transition:all .8s}
.yarn-return i{animation:returnCurl 3.5s infinite}
.materials{background:#fff}
.material-list{margin-top:80px;border-top:1px solid var(--line)}
.material-list article{display:grid;grid-template-columns:1.1fr 1fr 1.1fr;gap:40px;padding:28px 0;border-bottom:1px solid var(--line)}
.material-list article>div+div{border-left:1px solid var(--line);padding-left:28px}
.material-title{display:flex;gap:18px}
.material-title span{font-size:11px;color:var(--blue);padding-top:6px}
.material-title h3{font-size:22px;line-height:1.3;margin:0}
.material-list b{font-size:10px;letter-spacing:.09em;color:#65808d}
.material-list p{font-size:13px;line-height:1.7;color:#506975;margin:7px 0 0}
.material-merino{background:#eef7f9;margin:0 -26px;padding-left:26px!important;padding-right:26px!important}
.evidence{background:#f1f7f8}
.label-legend{display:flex;gap:8px;flex-wrap:wrap;margin-top:65px}
.badge{font-size:9px;letter-spacing:.08em;padding:5px 7px;border:1px solid var(--line-dark);color:#537181}
.badge.product{background:#fff}
.badge.study{background:#102f40;color:#d8eff4;border-color:#102f40}
.badge.schematic{background:#e2f1f5}
.badge.ai{background:#e9e7e1}
.evidence-register{margin-top:25px;border-top:1px solid var(--line)}
.evidence-register details{border-bottom:1px solid var(--line);padding:0}
.evidence-register summary{display:grid;grid-template-columns:56px 1fr 145px;gap:12px;list-style:none;padding:20px 0;cursor:pointer;font-size:14px}
.evidence-register summary::-webkit-details-marker{display:none}
.evidence-register summary b{color:var(--blue)}
.evidence-register summary em{font-size:10px;letter-spacing:.08em;font-style:normal;color:#77929c;text-align:right}
.evidence-register details>div{padding:0 0 22px 68px;font-size:13px;color:#506a76}
.evidence-register details>div p{margin:0 0 10px}
.claims-box{display:grid;grid-template-columns:1fr 1fr;margin-top:85px;background:#fff;border:1px solid var(--line)}
.claims-box>div{padding:30px}
.claims-box>div+div{border-left:1px solid var(--line);background:#f9efee}
.claims-box .eyebrow{margin-bottom:9px}
.claims-box p:not(.eyebrow){margin:0;font-size:14px;line-height:1.7;color:#526a75}
footer{margin-left:var(--side);padding:28px 9vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;gap:30px;font-size:10px;line-height:1.6;color:#77909a}
footer p{margin:0;max-width:520px}
@keyframes down{50%{translate:0 6px}
}
@keyframes drip{50%{translate:0 9px;opacity:.35}
}
@keyframes returnCurl{0%,25%{height:8px;width:28px;border-radius:99px;margin:-1px}
60%,100%{height:64px;width:18px;border-radius:50%;margin:-4px}
}
@media(max-width:1100px){:root{--side:210px}
.chapter{padding-left:7vw;padding-right:7vw}
.chapter-nav{margin-top:12vh}
.pre-sweat-panel>div{padding:35px}
.evidence-block{padding:40px}
.odor-scene{grid-template-columns:200px 1fr}
}
@media(max-width:780px){:root{--side:0}
.rail{display:none}
.mobile-header{display:flex;position:fixed;left:0;right:0;top:0;height:58px;padding:14px 18px;align-items:center;justify-content:space-between;background:rgba(245,249,250,.93);border-bottom:1px solid var(--line);backdrop-filter:blur(10px);z-index:10}
.mobile-header>a{font-size:17px;font-weight:700;text-decoration:none}
.mobile-header details{font-size:13px}
.mobile-header summary{list-style:none;cursor:pointer}
.mobile-header summary::-webkit-details-marker{display:none}
.mobile-header summary span{margin-left:6px}
.mobile-header nav{position:absolute;right:0;top:57px;width:min(310px,90vw);background:#f5f9fa;border:1px solid var(--line);padding:12px}
.mobile-header nav a{display:block;padding:10px;text-decoration:none;border-bottom:1px solid var(--line);font-size:13px}
main,footer{margin-left:0}
.hero{min-height:690px;padding:96px 24px 56px}
.hero h1{font-size:55px}
.hero-sub{font-size:14px}
.scroll-cue{left:24px}
.asset-label{right:16px;bottom:16px;font-size:8px}
.chapter{padding:92px 24px 72px}
.section-index{right:24px;top:22px}
.chapter h2{font-size:38px}
.lead{font-size:17px}
.definition-points,.term-grid,.thermal-story,.three-routes,.odor-routes,.recovery-sequence,.evidence-columns,.claims-box{grid-template-columns:1fr}
.definition-points article,.definition-points article+article{border-left:0;border-top:1px solid var(--line);padding:22px 0;min-height:0}
.definition-points article:first-child{border-top:0}
.claim-note,.balanced-callout{display:block}
.claim-note b,.balanced-callout b{display:block;margin-bottom:8px}
.fineness-visual{grid-template-columns:1fr;gap:10px;padding:28px}
.fineness-side{min-height:0;padding-top:5px}
.fiber-loop{height:90px}
.skin-line{margin:15px 0}
.term-grid article+article{border-left:0;border-top:1px solid var(--line)}
.pre-sweat-panel{grid-template-columns:1fr}
.pre-sweat-panel img{height:280px}
.pre-sweat-panel>div{padding:28px}
.three-routes{gap:10px;margin-top:45px}
.route{min-height:0}
.evidence-block{padding:30px 24px;margin-left:-24px;margin-right:-24px}
.evidence-block h3{font-size:24px}
.buffer-bars div{grid-template-columns:78px 57px 1fr;gap:9px}
.honesty-card{padding:28px 24px}
.odor-scene{grid-template-columns:1fr;gap:14px;margin-top:50px}
.person{margin:0}
.scene-copy h3{font-size:25px}
.recovery-sequence{gap:0;margin-top:50px}
.recovery-sequence article{padding:25px 0}
.material-list{margin-top:52px}
.material-list article{grid-template-columns:1fr;gap:17px;padding:25px 0}
.material-list article>div+div{border-left:0;border-top:1px solid var(--line);padding:15px 0 0}
.material-merino{margin:0 -18px;padding:25px 18px!important}
.evidence-register summary{grid-template-columns:44px 1fr;line-height:1.45}
.evidence-register summary em{grid-column:2;font-size:9px;text-align:left}
.evidence-register details>div{padding-left:44px}
.claims-box>div+div{border-left:0;border-top:1px solid var(--line)}
footer{padding:24px;display:block}
footer p+p{margin-top:10px}
}

/* v0.3: material studies replace symbolic line art */
.fineness-study,.human-thermal-story,.moisture-pathways-study,.odor-pathways-study{margin:78px 0 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:#fff}
.fineness-study img,.human-thermal-story img,.moisture-pathways-study img,.odor-pathways-study img{display:block;width:100%;height:auto}
.fineness-study figcaption,.human-thermal-story figcaption,.moisture-pathways-study figcaption,.odor-pathways-study figcaption{display:grid;gap:12px;padding:18px 22px;color:#54707c;font-size:12px;line-height:1.55}
.fineness-study figcaption,.human-thermal-story figcaption,.moisture-pathways-study figcaption{grid-template-columns:repeat(3,1fr)}
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