/* LearnMap · 学径 — styles derived from prototype V2.1 (prototype/source.html), unscoped for full pages. */
:root{
  --paper:light-dark(#F7F6F2,#171b1c);--surface:light-dark(#fff,#202628);--ink:light-dark(#203034,#e7efed);--sub:light-dark(#5f6f71,#a5b5b6);
  --line:light-dark(#e0e7e5,#354143);--soft:light-dark(#eef4f1,#293632);--brand:light-dark(#176b68,#92cfbd);--on:light-dark(#fff,#15302a);
  --warm:light-dark(#8a5a17,#e6be83);--warmbg:light-dark(#faf2e4,#3b3021);--danger:light-dark(#a3342b,#f0a69d);--dangerbg:light-dark(#fbeceb,#3d2523);
  color-scheme:light dark;
}
:root[data-theme="light"]{color-scheme:light}
:root[data-theme="dark"]{color-scheme:dark}
html{-webkit-text-size-adjust:100%}
body{margin:0;font:14px/1.65 'Segoe UI','PingFang SC','Microsoft YaHei','Noto Sans CJK SC',sans-serif;color:var(--ink);background:var(--paper);min-width:0;overflow-wrap:anywhere}

*{box-sizing:border-box}button,input,select,textarea{font:inherit;color:inherit}button,a{touch-action:manipulation}button{background:none;border:0}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--brand);outline-offset:3px}h1,h2,h3,p{margin:0}a{color:var(--brand);text-decoration:none}[hidden]{display:none!important}.shell{display:grid;grid-template-columns:168px minmax(0,1fr)}.side{background:var(--surface);padding:24px 13px;border-right:1px solid var(--line)}.brand{display:flex;align-items:center;gap:8px;font-size:15px;font-weight:650;white-space:nowrap;margin:0 5px 28px}.brandmark{width:29px;height:31px;border-radius:7px;display:grid;place-items:center;background:var(--brand);color:var(--on);font:23px Georgia,serif}.nav{display:flex;flex-direction:column;gap:4px}.nav button,.nav a{display:flex;align-items:center;gap:10px;padding:10px 11px;border-radius:7px;text-align:left;font-size:13px;color:var(--sub)}.nav button.active,.nav a.active{background:var(--soft);color:var(--brand);font-weight:600}.nav button:hover,.nav a:hover{background:var(--soft)}.navlabel{font-size:11px;letter-spacing:1px;padding:22px 11px 8px;color:var(--sub)}.navcount{margin-left:auto;font-size:11px}.sidebottom{margin-top:24px;padding:14px 5px 0;border-top:1px solid var(--line)}.github{border:1px solid var(--line);border-radius:22px;display:flex;gap:7px;align-items:center;justify-content:center;padding:8px;width:100%;font-size:12px}.appearance{display:flex;justify-content:space-between;border:1px solid var(--line);background:var(--paper);border-radius:22px;padding:4px;margin-top:13px}.appearance button{padding:7px 10px;border-radius:16px;display:flex;align-items:center}.appearance button.active{background:var(--surface);box-shadow:0 1px 4px #00000012;color:var(--brand)}.sidecaption{font-size:10px;color:var(--sub);text-align:center;margin-top:12px}.main{min-width:0}.top{padding:15px 24px;background:var(--surface);border-bottom:1px solid var(--line);display:flex;align-items:center;gap:15px;justify-content:space-between}.toplabel{font-size:12px;color:var(--sub)}.protonote{font-size:10px;color:var(--sub)}.content{padding:25px 25px 20px;min-height:760px}.head{display:flex;justify-content:space-between;gap:16px;align-items:flex-start;margin-bottom:20px}h1{font-size:28px;line-height:1.4;letter-spacing:-.8px;font-weight:650}.lead{font-size:12px;color:var(--sub);margin-top:7px;max-width:620px}.eyebrow{font-size:10px;color:var(--brand);letter-spacing:1.4px;margin-bottom:6px}.pill{font-size:11px;border:1px solid var(--line);padding:4px 9px;border-radius:20px;white-space:nowrap;background:var(--surface)}.row{display:flex;align-items:center;gap:8px;flex-wrap:wrap}.spread{display:flex;align-items:center;justify-content:space-between;gap:10px;flex-wrap:wrap}.search{display:flex;align-items:center;gap:10px;padding:12px 14px;border:1px solid var(--line);background:var(--surface);border-radius:9px}.search input{width:100%;min-width:0;border:0;background:none;font-size:14px}.search .shortcut{font-size:10px;white-space:nowrap;color:var(--sub)}.quick{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin:10px 0 21px;font-size:11px;color:var(--sub)}.quick button,.quick a{font-size:11px;color:var(--brand);padding:2px 4px}.filters{padding-bottom:14px;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap}.chip{font-size:12px;padding:5px 10px;border-radius:6px;border:1px solid var(--line);background:var(--surface)}.chip.active{background:var(--brand);color:var(--on);border-color:var(--brand)}select{border:1px solid var(--line);border-radius:6px;background:var(--surface);font-size:11px;padding:5px 7px;max-width:100%}.sort{font-size:11px;color:var(--sub);display:flex;gap:10px;align-items:center}.sort button,.sort a{font-size:11px;padding:5px 3px;color:var(--sub)}.sort button.active,.sort a.active{color:var(--brand);border-bottom:2px solid var(--brand)}.datehead{display:flex;align-items:baseline;gap:12px;margin:24px 0 13px}.datehead h2{font-size:20px;font-weight:600}.datehead span{font-size:11px;color:var(--sub)}.timeline{display:grid;grid-template-columns:49px minmax(0,1fr);gap:15px;margin-bottom:15px}.time{padding-top:16px;color:var(--sub);font:600 11px/1.5 Consolas,monospace;position:relative}.time:after{content:'';position:absolute;width:5px;height:5px;border-radius:50%;background:var(--brand);right:-7px;top:23px}.time:before{content:'';position:absolute;width:1px;background:var(--line);right:-5px;top:35px;bottom:-15px}.resource{background:var(--surface);border:1px solid var(--line);border-radius:11px;padding:16px;min-width:0}.resmeta{display:flex;justify-content:space-between;gap:10px;align-items:center;flex-wrap:wrap;font-size:11px;color:var(--sub);margin-bottom:12px}.origin{display:flex;align-items:center;gap:6px}.originmark{width:20px;height:20px;border:1px solid var(--line);border-radius:50%;display:grid;place-items:center;font:11px Georgia,serif;background:var(--soft);color:var(--brand)}.resbody{display:grid;grid-template-columns:142px minmax(0,1fr);gap:16px;align-items:start}.cover{height:104px;border-radius:7px;overflow:hidden;position:relative;background:#153c46;color:#f6f5e9;padding:12px 12px;display:flex;flex-direction:column;justify-content:space-between;isolation:isolate;text-align:left;user-select:none}.cover small{font-size:8px;letter-spacing:1.8px;z-index:1;font-weight:600}.cover strong{font:500 21px/1.05 Georgia,'Times New Roman',serif;letter-spacing:-.5px;max-width:112px;z-index:1;white-space:pre-line}.cover em{font-style:normal;font-size:8px;z-index:1;opacity:.8}.cover:before{content:'';position:absolute;z-index:-1;right:-55px;top:-45px;width:180px;height:180px;border-radius:50%;border:1px solid #c8e9db55;box-shadow:0 0 0 12px #c8e9db11,0 0 0 24px #c8e9db22,0 0 0 36px #c8e9db11,0 0 0 48px #c8e9db22;transform:rotate(-20deg)}.cover.amber{background:#efe6cf;color:#3e432c}.cover.amber:before{border-color:#68754577;box-shadow:0 0 0 12px #68754511,0 0 0 24px #68754522,0 0 0 36px #68754511,0 0 0 48px #68754522}.cover.blue{background:#dfe9ef;color:#163e5e}.cover.blue:before{border-color:#1a537955;box-shadow:0 0 0 12px #1a537911,0 0 0 24px #1a537922,0 0 0 36px #1a537911,0 0 0 48px #1a537922}.cover.plum{background:#413a51;color:#f1e5d4}.cover.plum:before{border-color:#d8b8de66;box-shadow:0 0 0 12px #d8b8de11,0 0 0 24px #d8b8de22,0 0 0 36px #d8b8de11,0 0 0 48px #d8b8de22}.cover.rust{background:#a3543e;color:#fff3de}.cover.book:after{content:'';position:absolute;left:0;top:0;bottom:0;width:5px;background:#00000025;border-right:1px solid #ffffff44}.cover.grid:before{width:160px;height:160px;border-radius:0;right:-25px;top:10px;border:0;box-shadow:none;background:repeating-linear-gradient(90deg,transparent 0 19px,#ffffff20 20px),repeating-linear-gradient(0deg,transparent 0 19px,#ffffff20 20px);transform:rotate(30deg)}.cover.neural:before{width:180px;height:180px;background:radial-gradient(circle,#cdebd277 2px,transparent 3px);background-size:19px 19px;right:-40px;top:14px;border:0;box-shadow:none;border-radius:0;transform:rotate(-25deg)}.title{font-size:16px;font-weight:600;line-height:1.4;text-align:left;padding:0;margin:0 0 7px}.title:hover{color:var(--brand)}.outcome{font-size:12px;line-height:1.85}.fit{font-size:11px;color:var(--sub);margin-top:8px}.fit b{font-weight:500;color:var(--ink)}.badges{display:flex;gap:5px;flex-wrap:wrap;margin:10px 0 0}.badge{font-size:10px;background:var(--soft);color:var(--sub);border-radius:4px;padding:2px 6px}.badge.free{color:var(--brand)}.badge.paid{background:var(--warmbg);color:var(--warm)}.resourcefoot{border-top:1px solid var(--line);margin-top:14px;padding-top:10px;display:flex;gap:10px;justify-content:space-between;align-items:center;flex-wrap:wrap}.discovery{font-size:10px;color:var(--sub)}.link{font-size:11px;color:var(--brand);display:inline-flex;align-items:center;gap:5px;padding:3px 0}.iconbtn{padding:3px;display:inline-flex;align-items:center;gap:3px;color:var(--sub);font-size:11px}.iconbtn.selected{color:var(--brand);background:var(--soft);border-radius:4px}.topiccrumb{font-size:10px;color:var(--sub);margin:9px 0 0;display:flex;flex-wrap:wrap;gap:5px}.topiccrumb button,.topiccrumb a{color:var(--brand);padding:0;font-size:10px}.primary{display:inline-flex;gap:7px;align-items:center;justify-content:center;padding:9px 13px;background:var(--brand);color:var(--on);border-radius:7px;font-size:12px;border:1px solid var(--brand)}.secondary{display:inline-flex;gap:7px;align-items:center;padding:9px 13px;border:1px solid var(--line);background:var(--surface);border-radius:7px;font-size:12px}.load{display:flex;justify-content:center;margin:20px 0}.catalog{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:20px}.catalog .resbody{display:block}.catalog .cover{height:145px;margin-bottom:14px}.catalog .cover strong{font-size:29px;max-width:190px}.catalog .cover small,.catalog .cover em{font-size:10px}.catalog .cover:before{right:-30px;top:-40px;width:245px;height:245px}.catalog .title{font-size:15px}.tree-layout{display:grid;grid-template-columns:218px minmax(0,1fr);gap:22px;margin-top:22px}.tree{border:1px solid var(--line);border-radius:9px;background:var(--surface);padding:12px;align-self:start}.tree-title{font-size:12px;font-weight:600;padding:4px 4px 10px}.tree ul{list-style:none;margin:0;padding-left:12px;border-left:1px solid var(--line)}.tree>ul{padding:0;border:0}.treeline{display:flex;align-items:center;gap:1px;margin:2px 0}.tree-toggle{flex:0 0 19px;width:19px;padding:4px 0;font-size:11px;color:var(--sub)}.tree-pick{padding:6px 5px;text-align:left;font-size:12px;border-radius:5px;min-width:0;flex:1}.tree-pick.active{background:var(--soft);color:var(--brand);font-weight:600}.tree-pick small{font-size:10px;color:var(--sub);margin-left:5px}.tree-results{min-width:0}.tree-results h2{font-size:22px;margin-bottom:7px}.tree-results .resource{margin-top:13px}.tree-results .resbody{grid-template-columns:105px minmax(0,1fr);gap:12px}.tree-results .cover{height:110px}.tree-results .cover strong{font-size:18px}.subtopics{display:flex;gap:7px;flex-wrap:wrap;margin:14px 0}.empty{padding:35px 14px;text-align:center;border:1px dashed var(--line);border-radius:8px;margin:15px 0;font-size:12px;color:var(--sub)}.section{margin:22px 0}.section h2{font-size:17px;font-weight:600;margin-bottom:13px}.section h3{font-size:14px;font-weight:600;margin:14px 0 8px}.section p,.section li{font-size:13px;line-height:1.9}.section ul{padding-left:20px}.notice{background:var(--soft);border-radius:7px;padding:12px 14px;font-size:12px;line-height:1.85;margin:14px 0}.notice.warm{background:var(--warmbg);color:var(--warm)}.muted{font-size:11px;color:var(--sub)}.detailhero{display:grid;grid-template-columns:minmax(0,1fr) 158px;gap:23px;margin:17px 0 23px}.detailhero .cover{height:181px}.detailhero .cover strong{font-size:28px;max-width:140px}.detailhero h1{font-size:27px;line-height:1.3;margin-top:8px}.detailhero .outcome{font-size:14px;margin:12px 0 16px}.tabs{display:flex;gap:21px;border-bottom:1px solid var(--line);margin-bottom:22px;flex-wrap:wrap}.tabs button,.tabs a{padding:10px 0;border-bottom:2px solid transparent;font-size:12px;color:var(--sub)}.tabs button.active,.tabs a.active{border-color:var(--brand);color:var(--brand);font-weight:600}.detailgrid{display:grid;grid-template-columns:minmax(0,1fr) 187px;gap:23px}.box{background:var(--surface);border:1px solid var(--line);padding:16px;border-radius:9px;margin-bottom:15px}.box h3{font-size:13px;margin-bottom:11px}.box p{font-size:12px;color:var(--sub)}.twobox{display:grid;grid-template-columns:1fr 1fr;gap:12px}.twobox .box{background:var(--soft);border:0}.check{padding:12px 0;border-bottom:1px solid var(--line);font-size:13px;display:flex;gap:10px}.check span{color:var(--brand)}.props{margin:0}.props div{padding:9px 0;border-bottom:1px solid var(--line)}.props dt{font-size:10px;color:var(--sub)}.props dd{font-size:12px;margin:4px 0 0}pre{font:12px/1.8 Consolas,monospace;white-space:pre-wrap;overflow-wrap:anywhere;margin:0;padding:13px;background:var(--soft)}.code{border:1px solid var(--line);border-radius:8px;overflow:hidden;margin:13px 0}.codehead{padding:8px 12px;display:flex;justify-content:space-between;align-items:center;font-size:11px;border-bottom:1px solid var(--line);background:var(--surface)}.step{padding:15px 0;border-bottom:1px solid var(--line)}.step h3{font-size:14px;margin:0 0 8px}.step p{font-size:12px}.tablewrap{overflow-x:auto;margin-top:16px}table{width:100%;border-collapse:collapse;min-width:420px;font-size:12px}td,th{text-align:left;vertical-align:top;padding:13px;border-bottom:1px solid var(--line)}th{background:var(--soft);font-weight:500}.comparebar{padding:12px 15px;margin-top:15px;background:var(--soft);border-radius:7px;display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap;font-size:12px}.sourcelist{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:19px}.sourcecard{padding:17px;background:var(--surface);border:1px solid var(--line);border-radius:9px}.sourcecard h3{font-size:14px;margin-bottom:8px}.sourcecard p{font-size:12px;color:var(--sub)}.flow{display:flex;gap:9px;align-items:center;flex-wrap:wrap;padding:13px 0;font-size:12px}.flow span{background:var(--soft);border-radius:6px;padding:7px 10px}.form{max-width:550px}.form label{display:block;margin:17px 0 7px;font-size:12px}.form input,.form textarea,.form select{width:100%;background:var(--surface);border:1px solid var(--line);border-radius:7px;padding:11px;font-size:13px}.form textarea{min-height:130px;resize:vertical}.status{font-size:12px;color:var(--brand);margin-top:13px;min-height:20px}.footer{margin-top:25px;padding-top:13px;border-top:1px solid var(--line);font-size:10px;color:var(--sub);display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}.ref-list a{display:block;font-size:12px;margin:8px 0}.mobile-menu{display:none}
@media(max-width:900px){.shell{grid-template-columns:150px minmax(0,1fr)}.content{padding:22px 18px}.side{padding:22px 10px}.brand{font-size:13px;gap:7px;margin-left:0}.resbody{grid-template-columns:115px minmax(0,1fr);gap:12px}.cover strong{font-size:19px}.tree-layout{grid-template-columns:190px minmax(0,1fr);gap:13px}.tree-results .resbody{display:block}.tree-results .cover{height:105px;margin-bottom:12px}.detailgrid{grid-template-columns:minmax(0,1fr)}.detailrail{display:grid;grid-template-columns:1fr 1fr;gap:13px}.catalog{grid-template-columns:1fr}.catalog .resbody{display:grid;grid-template-columns:142px minmax(0,1fr)}.catalog .cover{height:115px;margin-bottom:0}.catalog .cover strong{font-size:22px}}
@media(max-width:610px){.shell{display:block}.side{padding:13px 15px;border-right:0;border-bottom:1px solid var(--line)}.brand{margin:0 0 10px;font-size:15px}.nav{flex-direction:row;flex-wrap:wrap;gap:3px}.nav button,.nav a{padding:7px 8px;font-size:12px;gap:5px}.navlabel{padding:12px 8px 6px}.side-extra{display:none}body[data-menu="open"] .side-extra{display:block}.mobile-menu{display:inline-flex;position:absolute;right:18px;top:16px;padding:5px 8px;border:1px solid var(--line);border-radius:6px;font-size:11px}.side{position:relative}.sidebottom{display:flex;align-items:center;gap:10px;flex-wrap:wrap;margin-top:13px;padding-top:10px}.github{width:auto;padding:7px 11px}.appearance{margin-top:0;width:135px}.sidecaption{display:none}.top{padding:10px 16px;flex-wrap:wrap;gap:4px}.content{padding:20px 15px;min-height:580px}.head{margin-bottom:16px}h1{font-size:25px}.head .pill{display:none}.search input{font-size:16px}.shortcut{display:none}.timeline{grid-template-columns:minmax(0,1fr);gap:6px}.time{padding-top:0;font-size:11px}.time:before,.time:after{display:none}.resource{padding:13px}.resbody,.catalog .resbody{grid-template-columns:91px minmax(0,1fr);gap:11px}.cover,.catalog .cover{height:115px;padding:10px 9px}.cover strong,.catalog .cover strong{font-size:18px}.cover small,.cover em,.catalog .cover small,.catalog .cover em{font-size:7px;letter-spacing:.7px}.title{font-size:14px}.outcome{font-size:12px}.fit{grid-column:1/-1}.tree-layout{grid-template-columns:1fr}.tree{max-width:none}.tree-results .resbody{display:grid;grid-template-columns:91px minmax(0,1fr)}.tree-results .cover{margin:0}.tree-pick{padding-top:8px;padding-bottom:8px}.detailhero{grid-template-columns:1fr}.detailhero>.cover{display:none}.detailhero h1{font-size:25px}.twobox,.detailrail,.sourcelist{grid-template-columns:1fr}.protonote{font-size:9px}.tabs{gap:15px}.form input,.form textarea{font-size:16px}}
.cover{border-radius:var(--cover-radius,7px)}.cover strong{font-size:19px;max-width:100%}.nav button,.nav a{justify-content:flex-start}.tree-results .cover strong{font-size:15px}.cover em{font-size:8px}
@media(max-width:610px){.cover strong,.catalog .cover strong,.tree-results .cover strong{font-size:14px}.cover small{font-size:7px;letter-spacing:.4px}}

.brand{gap:8px;margin:0 0 7px;align-items:center;white-space:normal}
.brandmark{width:31px;height:31px;flex:0 0 31px;background:none;border-radius:0;display:block}
.brandmark img{display:block;width:100%;height:100%;object-fit:contain}
.brandmark .logo-dark{display:none}
:root[data-theme="dark"] .brandmark .logo-light{display:none}
:root[data-theme="dark"] .brandmark .logo-dark{display:block}
.brandwords{display:flex;flex-direction:column;min-width:0}
.brandwords strong{font-size:19px;line-height:1.3;letter-spacing:-.6px;font-weight:700}
.brandwords small{font-size:10px;line-height:1.6;font-weight:400;color:var(--sub);white-space:nowrap}
.brand-slogan{font-size:11px;line-height:1.6;color:var(--sub);margin:0 0 25px;white-space:nowrap}
.sidecaption{font-size:11px}
.about-brand{display:flex;align-items:center;gap:16px;margin:14px 0 18px}
.about-brand .brandmark{width:58px;height:58px;flex-basis:58px}
.about-brand h2{margin:0;font-size:24px}
@media(max-width:610px){.brand{margin:0 80px 5px 0}.brand-slogan{margin:0 0 14px;font-size:12px}.brandwords strong{font-size:21px}.brandwords small{font-size:11px}}
@media(prefers-color-scheme:dark){:root[data-theme="system"] .brandmark .logo-light{display:none}:root[data-theme="system"] .brandmark .logo-dark{display:block}}


/* ---- Production additions (not in the prototype preview) ---- */
.app{min-height:100vh}
.shell{min-height:100vh}
@media(min-width:611px){.side-inner{position:sticky;top:24px;max-height:calc(100vh - 48px);overflow-y:auto}}
.icon{width:15px;height:15px;flex:none;display:inline-block;vertical-align:-2px}
.icon svg{width:100%;height:100%}
a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
.sr-only{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;left:12px;top:-60px;background:var(--brand);color:var(--on);padding:8px 12px;border-radius:6px;z-index:10}
.skip-link:focus{top:12px}
html:not(.js) [data-js-only]{display:none!important}
.js [data-nojs-only]{display:none!important}
button{cursor:pointer;font:inherit;color:inherit;background:none;border:0}
a.chip,a.primary,a.secondary{display:inline-flex;align-items:center;gap:6px}
.nav a{display:flex;align-items:center;gap:10px;padding:10px 11px;border-radius:7px;text-align:left;font-size:13px;color:var(--sub)}
.title{display:block;color:var(--ink)}
.title:hover{color:var(--brand)}
h2.title-wrap,h3.title-wrap{margin:0;font-size:inherit;font-weight:inherit}
.badge.warn{background:var(--warmbg);color:var(--warm)}
.badge.danger{background:var(--dangerbg);color:var(--danger)}
.badge.ok{color:var(--brand)}
.notice.danger{background:var(--dangerbg);color:var(--danger)}
.cover img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:0}
.cover.has-image small,.cover.has-image strong,.cover.has-image em{display:none}
.demo-strip{background:var(--warmbg);color:var(--warm);font-size:12px;padding:7px 24px;border-bottom:1px solid var(--line)}
.interpretation{font-size:12px;color:var(--sub);margin:12px 0 0}
.interpretation b{color:var(--ink);font-weight:500}
.searchform{margin:0}
.search button[type=submit]{font-size:12px;color:var(--brand);padding:4px 6px;white-space:nowrap}
.filters form{display:flex;gap:8px;flex-wrap:wrap}
.pager{display:flex;justify-content:center;gap:12px;margin:20px 0;flex-wrap:wrap}
.tree details>summary{list-style:none}
.tree details>summary::-webkit-details-marker{display:none}
.tree-pick small{font-size:10px;color:var(--sub);margin-left:5px}
.tree-pick{display:block;color:var(--ink)}
.tree-pick.active{color:var(--brand)}
.roots{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:13px;margin-top:18px}
.roots a{display:block;padding:16px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink)}
.roots a:hover{border-color:var(--brand)}
.roots small{display:block;color:var(--sub);font-size:11px;margin-top:4px}
.step .meta{display:flex;flex-wrap:wrap;gap:6px;margin:8px 0}
.codehead .shell-name{display:flex;gap:8px;align-items:center}
.copy-status{font-size:11px;color:var(--brand)}
.recommendation{border-top:1px solid var(--line);padding:12px 0}
.recommendation:first-of-type{border-top:0}
.kv{display:grid;grid-template-columns:120px minmax(0,1fr);gap:6px 14px;font-size:12px;margin:10px 0}
.kv dt{color:var(--sub)}
.kv dd{margin:0}
.err{color:var(--danger);font-size:12px;margin-top:6px}
.flash{padding:10px 14px;border-radius:7px;margin:12px 0;font-size:13px;background:var(--soft);color:var(--brand)}
.flash.error{background:var(--dangerbg);color:var(--danger)}
.footer a{color:var(--sub);text-decoration:underline}
.footer nav{display:flex;gap:10px;flex-wrap:wrap}
/* admin */
.admin-top{display:flex;justify-content:space-between;align-items:center;gap:10px;flex-wrap:wrap}
.admin-nav{display:flex;gap:6px;flex-wrap:wrap;margin:14px 0 18px}
.admin-nav a{padding:6px 10px;border:1px solid var(--line);border-radius:6px;font-size:12px;background:var(--surface);color:var(--ink)}
.admin-nav a.active{background:var(--brand);color:var(--on);border-color:var(--brand)}
.datatable{width:100%;border-collapse:collapse;font-size:12px;min-width:560px}
.datatable td,.datatable th{padding:9px 10px;border-bottom:1px solid var(--line);vertical-align:top;text-align:left}
.datatable th{background:var(--soft);font-weight:500}
.grid2{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px}
.form-inline{display:flex;gap:8px;flex-wrap:wrap;align-items:flex-end}
.form-inline label{margin:0 0 4px}
.form .hint{font-size:11px;color:var(--sub);margin-top:4px}
.form fieldset{border:1px solid var(--line);border-radius:8px;padding:6px 14px 14px;margin:16px 0}
.form legend{font-size:12px;color:var(--sub);padding:0 6px}
.form .checks{display:flex;flex-wrap:wrap;gap:4px 14px;font-size:12px}
.form .checks label{display:flex;gap:5px;align-items:center;margin:4px 0}
.form .checks input{width:auto}
.btnrow{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
button.danger{background:var(--dangerbg);color:var(--danger);border:1px solid var(--danger);border-radius:7px;padding:8px 12px;font-size:12px}
pre.json{max-height:320px;overflow:auto;font-size:11px}
.stat{display:block;padding:14px;border:1px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink)}
.stat strong{display:block;font-size:22px}
.stat span{font-size:11px;color:var(--sub)}
@media(max-width:610px){
  .demo-strip{padding:7px 15px}
  .kv{grid-template-columns:1fr}
  .side .nav a{padding:7px 8px;font-size:12px;gap:5px}
}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}
.brand{color:var(--ink)}
.evkind{font:10px/1.5 'PingFang SC','Microsoft YaHei',sans-serif;margin-top:5px}
details[open]>summary .tree-toggle{transform:rotate(90deg)}
.tree-toggle{display:inline-block;text-align:center;transition:transform .15s}
summary.treeline{cursor:pointer}
.form-inline input,.form-inline select{border:1px solid var(--line);border-radius:7px;padding:8px 10px;background:var(--surface);font-size:13px;max-width:100%}
.box .form{max-width:none}
/* subject tree: toggle (summary) and topic link are sibling controls on one row */
.tree li.tree-branch{display:grid;grid-template-columns:19px minmax(0,1fr);align-items:center;margin:2px 0;column-gap:1px}
.tree li.tree-branch>details{display:contents}
.tree li.tree-branch>details>summary{grid-column:1;grid-row:1;list-style:none;cursor:pointer;border-radius:4px}
.tree li.tree-branch>details>summary::-webkit-details-marker{display:none}
.tree li.tree-branch>a.tree-pick{grid-column:2;grid-row:1}
.tree li.tree-branch>details>ul{grid-column:1/-1;grid-row:2}
/* links inside running text are underlined, not distinguished by colour alone */
.notice a,.lead a,.section p a,.form .hint a{text-decoration:underline}
.tree li.tree-branch>details::details-content{grid-column:1/-1;grid-row:2;min-width:0}

/* About page: sections with clear spacing instead of one long text block. */
.about-hero{padding-bottom:6px;border-bottom:1px solid var(--line);margin-bottom:8px}
.about-section{margin:34px 0 0;max-width:880px}
.about-section>h2{font-size:18px;font-weight:600;margin-bottom:14px}
.about-section>p{font-size:13px;line-height:1.9;color:var(--ink)}
.about-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px}
.about-grid.two{grid-template-columns:repeat(2,minmax(0,1fr))}
.about-card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:16px 18px}
.about-card h3{display:flex;align-items:center;gap:7px;font-size:14px;font-weight:600;margin-bottom:8px}
.about-card h3 .icon{color:var(--brand)}
.about-card p{font-size:12.5px;line-height:1.85;color:var(--sub)}
.about-note{font-size:12.5px!important;color:var(--sub)!important;line-height:1.85;margin-top:12px}
.about-steps{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px}
.about-steps li{display:flex;gap:10px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px}
.about-step-no{flex:0 0 24px;height:24px;border-radius:50%;display:grid;place-items:center;background:var(--soft);color:var(--brand);font-size:12px;font-weight:600}
.about-steps b{font-size:13px}
.about-steps p{font-size:12px;color:var(--sub);line-height:1.7;margin-top:3px}
.about-refs{margin-top:12px;font-size:12.5px}
.about-refs summary{cursor:pointer;color:var(--brand)}
.about-refs .ref-list{margin-top:6px;padding-left:4px}
.about-list{padding-left:20px;margin:0}
.about-list li{font-size:13px;line-height:1.9;margin-bottom:4px}
.about-operator{padding:16px 18px;background:var(--soft);border-radius:10px;margin-bottom:12px}
.about-operator h2{font-size:15px;margin-bottom:6px}
@media (max-width:900px){.about-grid,.about-steps{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:560px){.about-grid,.about-grid.two,.about-steps{grid-template-columns:minmax(0,1fr)}}

/* Compare selection floats at the bottom so the 对比 button has visible feedback on every page. */
.comparebar.floating{position:fixed;z-index:40;left:50%;transform:translateX(-50%);bottom:16px;width:min(640px,calc(100vw - 32px));margin:0;background:var(--surface);border:1px solid var(--line);box-shadow:0 6px 24px #0000001f}
body:has(.comparebar.floating) .content{padding-bottom:96px}