@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800;900&family=Noto+Serif+SC:wght@700;900&display=swap');

:root{
  font-family:"Noto Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  color-scheme:dark;
  --bg:#101719;
  --bg-deep:#0b1113;
  --surface:#172124;
  --surface-strong:#1d292d;
  --surface-soft:#eef2ed;
  --text:#f4f7f3;
  --ink:#172022;
  --muted:#a8b4b3;
  --muted-dark:#596565;
  --line:#2f3c40;
  --line-strong:#596a6e;
  --accent:#e5ff44;
  --accent-ink:#111611;
  --warning:#ffb45f;
  --max:1440px;
  --pad:clamp(20px,4vw,64px);
  --z-header:20;
  --z-compare:30;
  --z-dialog:40;
}

*{box-sizing:border-box}
html{scroll-padding-top:92px}
body{margin:0;min-width:320px;background:var(--bg);color:var(--text);font-size:16px;line-height:1.6}
button,input{font:inherit}
button,a{touch-action:manipulation}
button{cursor:pointer}
button:disabled{cursor:not-allowed}
a{color:inherit}
img{display:block;max-width:100%}
p,li,dd{max-width:75ch;text-wrap:pretty}
h1,h2,h3{margin-top:0;text-wrap:balance}
[hidden]{display:none!important}
.shell{width:min(var(--max),100%);margin-inline:auto;padding-inline:var(--pad)}
.skip-link{position:fixed;top:-80px;left:16px;z-index:var(--z-dialog);padding:12px 16px;background:#fff;color:#111;text-decoration:none}
.skip-link:focus{top:16px}
.eyebrow{margin:0;color:var(--accent);font-size:13px;font-weight:800;text-transform:uppercase}

.site-header{position:sticky;top:0;z-index:var(--z-header);background:var(--bg);border-bottom:1px solid var(--line)}
.nav-wrap{min-height:72px;display:flex;align-items:center;gap:28px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-size:20px;font-weight:900;white-space:nowrap}
.brand small{color:var(--muted);font-size:12px;font-weight:600;border-left:1px solid var(--line);padding-left:10px}
.brand-mark{display:grid;place-items:center;width:32px;height:32px;border-radius:9px;background:var(--accent);color:var(--accent-ink);font:900 13px/1 ui-monospace,monospace;transform:rotate(-6deg)}
.nav-links{display:flex;align-items:center;gap:22px;margin-left:auto}
.nav-links a,.version-link{color:var(--muted);font-size:14px;font-weight:700;text-decoration:none}
.nav-links a:hover,.nav-links a:focus-visible,.version-link:hover,.version-link:focus-visible{color:var(--text)}
.version-link{border-left:1px solid var(--line);padding-left:22px}
.nav-toggle{display:none;margin-left:auto;width:44px;height:44px;border:1px solid var(--line);background:transparent;color:var(--text)}
.nav-toggle span{display:block;width:18px;height:2px;margin:4px auto;background:currentColor}

.source-strip{border-bottom:1px solid var(--line);background:var(--bg-deep)}
.source-strip-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:46px}
.source-strip p{margin:0;color:var(--muted);font-size:13px}
.source-strip strong{color:var(--text)}
.source-strip span{color:var(--muted);font-size:12px;white-space:nowrap}

.hero{min-height:720px;display:grid;grid-template-columns:minmax(0,1.04fr) minmax(420px,.96fr);border-bottom:1px solid var(--line)}
.hero-copy{display:flex;flex-direction:column;justify-content:center;padding:clamp(64px,7vw,108px) var(--pad)}
.hero h1{max-width:820px;margin:22px 0 24px;font-size:clamp(52px,6.4vw,96px);line-height:.98;font-weight:900}
.hero h1 strong{display:block;color:var(--accent);font-family:"Noto Serif SC",serif;font-weight:900}
.hero-lead{max-width:700px;margin:0;color:var(--muted);font-size:18px}
.hero-search{max-width:760px;margin-top:34px}
.hero-search>label{display:block;margin-bottom:9px;color:var(--muted);font-size:13px;font-weight:700}
.search-control{display:flex;border:1px solid var(--line-strong);background:var(--bg-deep)}
.search-control input{min-width:0;flex:1;border:0;background:transparent;color:var(--text);padding:18px 20px;outline:none}
.search-control input:focus-visible{outline:2px solid var(--accent);outline-offset:-3px}
.search-control button{min-width:124px;border:0;background:var(--accent);color:var(--accent-ink);font-weight:900}
.hero-actions{display:flex;gap:10px;margin-top:14px}
.primary-btn,.secondary-btn{display:inline-flex;align-items:center;justify-content:center;min-height:48px;padding:0 20px;border:1px solid transparent;text-decoration:none;font-weight:800}
.primary-btn{background:var(--accent);color:var(--accent-ink)}
.secondary-btn{border-color:var(--line-strong);color:var(--text)}
.primary-btn:hover,.primary-btn:focus-visible{background:#f0ff83}
.secondary-btn:hover,.secondary-btn:focus-visible{border-color:var(--accent)}
.primary-btn.full{width:100%}
.hero-principles{display:flex;gap:18px;flex-wrap:wrap;margin:26px 0 0;padding:0;list-style:none;color:var(--muted);font-size:13px}
.hero-principles li{display:flex;align-items:center;gap:8px}
.hero-principles li::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--accent)}
.hero-media{position:relative;min-height:620px;background:var(--surface);overflow:hidden}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.83}
.hero-caption{position:absolute;right:28px;bottom:28px;left:28px;padding:20px;border:1px solid #ffffff33;background:#0b1113e8}
.hero-caption span{color:var(--accent);font-size:12px;font-weight:800}
.hero-caption strong{display:block;margin-top:6px;font-size:20px}
.hero-caption p{margin:6px 0 0;color:var(--muted);font-size:14px}

.section{padding-block:clamp(72px,8vw,116px)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:32px;margin-bottom:34px}
.section-head h2{margin:8px 0 0;font-size:clamp(34px,4.4vw,60px);line-height:1.08}
.section-head>p{margin:0;color:var(--muted)}

.chooser{border-bottom:1px solid var(--line)}
.decision-layout{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(330px,.65fr);gap:20px;align-items:start}
.decision-steps{border:1px solid var(--line)}
.choice-group{margin:0;padding:26px;border:0;border-bottom:1px solid var(--line)}
.choice-group:last-child{border-bottom:0}
.choice-group legend{display:flex;align-items:center;gap:10px;width:100%;padding:0;font-size:20px;font-weight:800}
.choice-group legend span{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--accent);color:var(--accent-ink);font:900 12px/1 ui-monospace,monospace}
.choice-list{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;margin-top:20px}
.choice-list button{min-height:86px;border:1px solid var(--line);background:var(--surface);color:var(--text);padding:14px;text-align:left;font-weight:800}
.choice-list.compact button{min-height:52px;text-align:center}
.choice-list button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}
.choice-list small{display:block;margin-top:6px;color:var(--muted);font-size:12px;font-weight:500}
.choice-list button[aria-pressed="true"] small{color:#293020}
.decision-summary{position:sticky;top:92px;padding:28px;border:1px solid var(--line-strong);background:var(--surface-strong)}
.decision-summary h3{margin:12px 0 24px;font-size:28px}
.summary-state{padding:18px;border:1px solid var(--line);background:var(--bg-deep)}
.summary-state span{display:block;color:var(--muted);font-size:12px}
.summary-state strong{display:block;margin-top:5px;color:var(--accent);font-size:19px}
.decision-summary dl{margin:20px 0}
.decision-summary dl div{display:grid;grid-template-columns:80px 1fr;gap:12px;padding:10px 0;border-top:1px solid var(--line)}
.decision-summary dt{color:var(--muted);font-size:13px}
.decision-summary dd{margin:0}

.ranking-section{background:var(--bg-deep);border-bottom:1px solid var(--line)}
.ranking-grid{display:grid;grid-template-columns:1fr 1fr;border:1px solid var(--line)}
.ranking-lane{min-height:330px;padding:28px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);display:flex;flex-direction:column}
.ranking-lane:nth-child(2n){border-right:0}
.ranking-lane.secondary{min-height:210px;border-bottom:0}
.ranking-lane header{display:flex;gap:16px;align-items:flex-start}
.ranking-lane header>span{color:var(--accent);font:900 28px/1 ui-monospace,monospace;font-variant-numeric:tabular-nums}
.ranking-lane h3{margin:0 0 4px;font-size:26px}
.ranking-lane header p,.ranking-placeholder p{margin:0;color:var(--muted)}
.ranking-placeholder{margin:34px 0;padding:24px;border:1px dashed var(--line-strong)}
.ranking-placeholder strong{font-size:18px}
.ranking-placeholder p{margin-top:8px}
.ranking-lane footer{margin-top:auto;color:var(--warning);font-size:13px}

.archive-tools{display:grid;grid-template-columns:1fr 1fr auto;gap:14px;align-items:center;margin-bottom:24px}
.filter-row{display:flex;gap:8px;flex-wrap:wrap}
.filter-row button{min-height:42px;padding:0 15px;border:1px solid var(--line);border-radius:999px;background:transparent;color:var(--muted)}
.filter-row button[aria-pressed="true"]{border-color:var(--accent);background:var(--accent);color:var(--accent-ink);font-weight:800}
.result-count{margin:0;color:var(--muted);font-size:13px;white-space:nowrap}
.product-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.product-card{display:flex;flex-direction:column;min-height:520px;padding:22px;border:1px solid var(--line);background:var(--surface)}
.product-card:focus-within{border-color:var(--accent)}
.product-meta{display:flex;justify-content:space-between;gap:12px;align-items:center;font:800 12px/1.3 ui-monospace,monospace;color:var(--accent)}
.status{padding:5px 8px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-family:inherit;font-weight:600}
.status.pending{border-color:#7a6b4e;color:#e1bf80}
.paddle-glyph{position:relative;width:74px;height:106px;margin:24px auto 48px;border:2px solid var(--accent);border-radius:34% 34% 28% 28%/22% 22% 34% 34%;background:#202c30}
.paddle-glyph::after{content:"";position:absolute;bottom:-42px;left:50%;width:20px;height:48px;border:1px solid currentColor;border-top:0;border-radius:0 0 8px 8px;background:#202c30;transform:translateX(-50%)}
.paddle-glyph.orange{color:#ff805d;border-color:#ff805d}.paddle-glyph.gray{color:#9da9a9;border-color:#9da9a9}.paddle-glyph.light{color:#d8ddd8;border-color:#d8ddd8}.paddle-glyph.amber{color:#e6a24e;border-color:#e6a24e}.paddle-glyph.bluegray{color:#7f9ba4;border-color:#7f9ba4}
.product-card h3{margin:0;font-size:24px}
.product-summary{margin:8px 0 20px;color:var(--muted)}
.evidence-list{margin:0;border-top:1px solid var(--line)}
.evidence-list div{display:flex;justify-content:space-between;gap:16px;padding:9px 0;border-bottom:1px solid var(--line)}
.evidence-list dt{color:var(--muted);font-size:13px}.evidence-list dd{margin:0;font-size:13px}
.fit-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin:18px 0}
.fit-grid p{margin:0;padding:10px;border:1px solid var(--line);font-size:13px}
.fit-grid span{display:block;margin-bottom:4px;color:var(--accent);font-weight:800}
.card-actions{display:grid;grid-template-columns:1fr 1fr;gap:8px;margin-top:auto}
.card-actions button{min-height:44px;border:1px solid var(--line-strong);background:transparent;color:var(--text);font-weight:800}
.card-actions button:hover,.card-actions button:focus-visible{border-color:var(--accent)}
.card-actions button.is-selected{border-color:var(--accent);background:var(--accent);color:var(--accent-ink)}
.empty-state{padding:48px;text-align:center;border:1px dashed var(--line-strong)}
.empty-state strong{font-size:22px}.empty-state p{margin:6px auto 18px;color:var(--muted)}
.empty-state button{min-height:44px;padding:0 18px;border:0;background:var(--accent);color:var(--accent-ink);font-weight:800}

.answer-section{background:var(--surface-soft);color:var(--ink)}
.answer-section .eyebrow{color:#4e6500}
.answer-layout{display:grid;grid-template-columns:1.1fr repeat(3,1fr);border:1px solid #b9c2bc}
.answer-intro,.answer-card{padding:28px}
.answer-card{border-left:1px solid #b9c2bc}
.answer-intro h2{font-size:clamp(36px,4.2vw,58px);line-height:1.08;margin:10px 0 20px}
.answer-intro>p:last-child{color:var(--muted-dark)}
.answer-card>span{color:#4e6500;font-size:12px;font-weight:800}
.answer-card h3{margin:16px 0;font-size:22px}
.answer-card p{color:#364243}
.answer-card footer{margin-top:24px;padding-top:14px;border-top:1px solid #c8cfca;color:var(--muted-dark);font-size:12px}

.field-notes{background:var(--bg-deep);border-bottom:1px solid var(--line)}
.notes-grid{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line)}
.note-card,.contribute-card{min-height:340px;padding:26px;border-right:1px solid var(--line)}
.notes-grid>*:last-child{border-right:0}
.note-card>span,.contribute-card>span{color:var(--accent);font-size:12px;font-weight:800}
.note-card h3,.contribute-card h3{margin:16px 0 10px;font-size:21px}
.note-card p,.contribute-card p{color:var(--muted)}
.note-card a{display:inline-block;margin-top:22px;color:var(--accent);font-weight:800;text-decoration:none}
.contribute-card{background:var(--surface-strong)}
.contribute-card button{min-height:44px;padding:0 16px;border:1px solid var(--line);background:transparent;color:var(--muted)}

.evidence-section{border-bottom:1px solid var(--line)}
.evidence-grid{display:grid;grid-template-columns:1fr 1.2fr .8fr;border:1px solid var(--line)}
.health-card,.revision-card,.method-card{padding:26px;border-right:1px solid var(--line)}
.evidence-grid>*:last-child{border-right:0}
.health-card>span,.revision-card>span,.method-card>span{color:var(--accent);font-size:12px;font-weight:800}
.health-card h3,.revision-card h3,.method-card h3{margin:14px 0 20px;font-size:24px}
.health-card ul{margin:0;padding:0;list-style:none}
.health-card li{display:flex;justify-content:space-between;gap:14px;padding:11px 0;border-top:1px solid var(--line)}
.health-card em{color:var(--muted);font-style:normal}
.revision-row{display:grid;grid-template-columns:120px 1fr auto;gap:14px;padding:12px 0;border-top:1px solid var(--line)}
.revision-row p{margin:0;color:var(--muted)}
.revision-row time{color:var(--muted);font-size:12px}
.method-card p{color:var(--muted)}
.method-card a{display:inline-block;margin-top:18px;color:var(--accent);font-weight:800}

.compare-bar{position:sticky;bottom:0;z-index:var(--z-compare);padding-bottom:env(safe-area-inset-bottom);border-top:1px solid var(--line-strong);background:#0b1113f4;box-shadow:0 -12px 32px #0008}
.compare-inner{display:grid;grid-template-columns:220px 1fr 1fr 220px;gap:10px;align-items:center;padding-block:12px}
.compare-label strong{display:block;font-size:18px}.compare-label span{color:var(--muted);font-size:12px}
.compare-slot{display:flex;align-items:center;justify-content:center;gap:8px;min-height:56px;padding:8px 12px;border:1px dashed var(--line-strong);color:var(--muted)}
.compare-slot.is-filled{justify-content:flex-start;border-style:solid;color:var(--text)}
.compare-slot.is-filled strong{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.compare-slot button{margin-left:auto;border:0;background:transparent;color:var(--muted);font-size:22px}
.compare-inner>[data-compare-action]{min-height:50px;border:0;background:var(--accent);color:var(--accent-ink);font-weight:900}
.compare-inner>[data-compare-action]:disabled{opacity:.36}

.site-footer{padding:52px 0 28px;background:var(--bg-deep);color:var(--muted)}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.footer-grid h2{margin-bottom:10px;color:var(--text);font-size:22px}
.footer-grid nav,.future-categories{display:grid;align-content:start;gap:8px}
.footer-grid strong{color:var(--text)}
.footer-grid a{text-decoration:none}.footer-grid a:hover{color:var(--text)}
.future-categories span:last-child{font-size:13px}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:36px;padding-top:18px;border-top:1px solid var(--line);font-size:12px}
.footer-bottom a{color:var(--text)}

dialog{z-index:var(--z-dialog);width:min(760px,calc(100% - 32px));padding:0;border:1px solid var(--line-strong);background:var(--surface-strong);color:var(--text);box-shadow:0 28px 80px #000a}
dialog::backdrop{background:#060a0ccf}
.dialog-head{display:flex;justify-content:space-between;gap:18px;padding:24px;border-bottom:1px solid var(--line)}
.dialog-head h2{margin:8px 0 0;font-size:30px}
.dialog-head button{width:44px;height:44px;border:1px solid var(--line);background:transparent;color:var(--text);font-size:26px}
.dialog-body{padding:24px}
.dialog-callout{margin-top:20px;padding:14px;border-left:3px solid var(--warning);background:var(--bg-deep);color:var(--muted)}
.compare-table{display:grid;gap:0}
.compare-table header,.compare-row{display:grid;grid-template-columns:1fr 1fr 1fr;gap:12px;padding:12px 0;border-bottom:1px solid var(--line)}
.compare-table header{color:var(--muted);font-size:12px}
.compare-row strong{font-variant-numeric:tabular-nums}
.compare-note{margin-top:18px;color:var(--muted);font-size:13px}

@media(max-width:1180px){
  .nav-links{gap:14px}.nav-links a{font-size:13px}.version-link{display:none}
  .hero{grid-template-columns:1fr 440px}.hero h1{font-size:64px}
  .archive-tools{grid-template-columns:1fr}.result-count{justify-self:start}
  .answer-layout{grid-template-columns:1fr 1fr}.answer-intro{grid-column:1/-1}.answer-card{border-top:1px solid #b9c2bc}.answer-card:nth-child(odd){border-left:0}
  .notes-grid{grid-template-columns:1fr 1fr}.note-card,.contribute-card{border-bottom:1px solid var(--line)}.notes-grid>*:nth-child(2n){border-right:0}.notes-grid>*:nth-child(n+3){border-bottom:0}
  .evidence-grid{grid-template-columns:1fr 1fr}.method-card{grid-column:1/-1;border-top:1px solid var(--line);border-right:0}
}

@media(max-width:900px){
  .brand small{display:none}.nav-toggle{display:block}.nav-links{position:absolute;top:72px;right:0;left:0;display:none;flex-direction:column;align-items:stretch;margin:0;padding:18px var(--pad);border-bottom:1px solid var(--line);background:var(--bg)}.nav-links.is-open{display:flex}.nav-links a{padding:8px 0}
  .source-strip-inner{align-items:flex-start;padding-block:10px}.source-strip span{display:none}
  .hero{grid-template-columns:1fr}.hero-media{min-height:420px}.hero h1{font-size:clamp(48px,10vw,72px)}
  .decision-layout{grid-template-columns:1fr}.decision-summary{position:static}
  .product-grid{grid-template-columns:1fr 1fr}
  .compare-inner{grid-template-columns:1fr 1fr}.compare-label,.compare-inner>[data-compare-action]{grid-column:1/-1}
  .footer-grid{grid-template-columns:1fr 1fr}
}

@media(max-width:640px){
  html{scroll-padding-top:72px}.nav-wrap{min-height:64px}.nav-links{top:64px}
  .section{padding-block:64px}.section-head{display:block}.section-head>p{margin-top:14px}
  .hero-copy{padding-block:58px}.hero h1{font-size:48px}.hero-actions{flex-direction:column}.hero-principles{display:grid;gap:8px}.hero-media{min-height:360px}.hero-caption{right:16px;bottom:16px;left:16px}
  .search-control{display:block}.search-control button{width:100%;min-height:48px}
  .choice-list{grid-template-columns:1fr}.choice-list button{min-height:68px}
  .ranking-grid{grid-template-columns:1fr}.ranking-lane{border-right:0}.ranking-lane.secondary{border-bottom:1px solid var(--line)}.ranking-lane:last-child{border-bottom:0}
  .product-grid{grid-template-columns:1fr}.product-card{min-height:500px}
  .answer-layout{grid-template-columns:1fr}.answer-intro{grid-column:auto}.answer-card{border-left:0}
  .notes-grid{grid-template-columns:1fr}.note-card,.contribute-card{border-right:0;border-bottom:1px solid var(--line)}.notes-grid>*:nth-child(n+3){border-bottom:1px solid var(--line)}.notes-grid>*:last-child{border-bottom:0}
  .evidence-grid{grid-template-columns:1fr}.health-card,.revision-card,.method-card{grid-column:auto;border-right:0;border-bottom:1px solid var(--line)}.method-card{border-bottom:0}
  .revision-row{grid-template-columns:1fr}.revision-row time{margin-top:-8px}
  .compare-bar{position:relative}.compare-inner{grid-template-columns:1fr}.compare-label,.compare-inner>[data-compare-action]{grid-column:auto}.compare-slot{display:none}
  .footer-grid{grid-template-columns:1fr}.footer-bottom{display:block}.footer-bottom a{display:inline-block;margin-top:8px}
  .compare-table header,.compare-row{grid-template-columns:1fr 1fr 1fr;font-size:13px}
}

@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}