:root{--navy:#0b1f33;--ink:#152b3e;--paper:#f5f1e8;--white:#fffdf8;--amber:#e59a2f;--line:#c9c1b2;--muted:#607080;--max:1240px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Segoe UI","Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit}.skip{position:absolute;left:-9999px}.skip:focus{left:10px;top:10px;background:white;padding:10px;z-index:100}.top{max-width:var(--max);margin:auto;min-height:88px;padding:12px 24px;display:flex;align-items:center;justify-content:space-between;border-bottom:2px solid var(--navy)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none}.brand img{object-fit:contain}.brand span{display:grid}.brand b{font-size:20px;letter-spacing:.04em}.brand small{font:10px/1.2 Consolas,monospace;letter-spacing:.15em;color:var(--muted)}.top nav{display:flex;gap:22px;align-items:center}.top nav a{text-decoration:none;font-size:14px}.top button{display:none}main{max-width:var(--max);margin:auto;padding:0 24px}.hero{min-height:650px;display:grid;grid-template-columns:1.55fr .7fr;gap:70px;align-items:center}.hero>div>span,.pagehead>span,.latest header span,.dimensions header span,.article header>span,.calc header span,.editorial header span,.about header span,.contact header span{font:700 12px/1.2 Consolas,monospace;letter-spacing:.18em;color:#9a5a00}.hero h1{font-family:Georgia,"Songti SC",serif;font-size:clamp(54px,8vw,104px);line-height:.98;margin:.18em 0 .3em;color:var(--navy);letter-spacing:-.04em}.hero p{font-size:20px;max-width:680px}.actions{display:flex;gap:12px;margin-top:34px}.actions a{padding:12px 18px;border:1px solid var(--navy);text-decoration:none}.actions a:first-child{background:var(--navy);color:white}.hero aside{background:var(--navy);color:white;padding:38px}.hero aside>b{color:var(--amber)}.hero aside ol{padding-left:22px}.hero aside li{padding:10px 0;border-bottom:1px solid #ffffff2b}.dimensions{padding:80px 0;border-top:1px solid var(--navy)}.dimensions header,.latest header{display:grid;grid-template-columns:180px 1fr;align-items:start}.dimensions h2,.latest h2{font:46px/1.1 Georgia,serif;margin:0 0 38px}.dimensions>div{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}.dimensions a{background:var(--white);padding:28px;text-decoration:none;min-height:180px}.dimensions a b{font-size:22px}.dimensions a strong{float:right;color:#9a5a00}.dimensions a p{color:var(--muted)}.latest{padding:90px 0}.latest>div{display:grid;grid-template-columns:repeat(2,1fr);border-top:1px solid var(--navy)}.latest a{padding:30px 24px;border-bottom:1px solid var(--line);text-decoration:none}.latest a:nth-child(odd){border-right:1px solid var(--line)}.latest a span,.indexlist a>span{font-size:12px;color:#9a5a00}.latest h3{font:28px/1.25 Georgia,serif;margin:8px 0}.latest p{color:var(--muted)}.disclosure{margin:0 0 80px;background:#e9dfcc;padding:28px;display:grid;grid-template-columns:150px 1fr auto;gap:30px;align-items:start}.disclosure p{margin:0}.pagehead{padding:90px 0 60px;border-bottom:3px solid var(--navy)}.pagehead h1{font:clamp(50px,8vw,94px)/1 Georgia,serif;margin:.15em 0}.pagehead p{font-size:20px}.indexlist{margin-bottom:90px}.indexlist a{display:grid;grid-template-columns:58px 120px 1fr 1fr;gap:22px;padding:26px 8px;border-bottom:1px solid var(--line);text-decoration:none;align-items:start}.indexlist i{font:18px Consolas,monospace;color:#9a5a00}.indexlist h2{font:24px/1.25 Georgia,serif;margin:0}.indexlist p{margin:0;color:var(--muted)}.topicgrid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px;padding:50px 0 90px}.topicgrid a{padding:30px;background:var(--white);text-decoration:none;border-top:5px solid var(--amber)}.topicgrid h2{font:28px/1.25 Georgia,serif}.topicgrid span{color:#9a5a00}.article{max-width:980px;margin:70px auto 100px}.article>header{border-bottom:3px solid var(--navy);padding-bottom:40px}.article header nav{display:flex;gap:10px;font-size:13px}.article h1{font:clamp(42px,6vw,72px)/1.12 Georgia,"Songti SC",serif;color:var(--navy);margin:.25em 0}.article header p{font-size:21px}.toc{margin:34px 0;padding:25px 30px;background:#e9dfcc}.toc ol{columns:2}.toc a{text-decoration:none}.prose{max-width:760px;margin:55px auto}.prose section{padding:10px 0 28px}.prose section>span{font:700 13px Consolas,monospace;color:#9a5a00}.prose h2{font:34px/1.25 Georgia,serif;margin:.2em 0}.prose p{font-size:18px;line-height:2}.conclusion{border-top:3px solid var(--navy);margin-top:28px}.boundary{background:#efe4cf;padding:24px;margin-top:30px}.calc,.editorial,.about,.contact{padding:80px 0 100px}.calc header h1,.editorial h1,.about h1,.contact h1{font:clamp(48px,7vw,86px)/1 Georgia,serif;margin:.2em 0}.calc form{display:grid;grid-template-columns:repeat(3,1fr) auto;gap:14px;padding:28px;background:var(--navy);color:white;margin-top:45px;align-items:end}.calc label{display:grid;gap:6px}.calc input{padding:12px;border:0;font-size:18px}.calc button{padding:13px 20px;background:var(--amber);border:0;font-weight:bold}.calc output{display:block;background:white;padding:40px;margin-top:1px}.calc output span{display:block}.calc output b{font:64px Georgia,serif}.calcnotes{margin-top:45px}.editorial>div,.about>div{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:45px}.editorial article,.about article{background:var(--white);padding:36px}.editorial article>b{color:#9a5a00}.contact address{font-style:normal;display:grid;gap:10px;background:var(--navy);color:white;padding:38px;max-width:720px;margin:42px 0}.contact address b{font-size:24px}.contact ol{max-width:720px}.notfound{min-height:600px;display:grid;place-content:center;text-align:center}.notfound span{font:100px Georgia,serif;color:var(--amber)}footer{max-width:var(--max);margin:auto;padding:34px 24px;border-top:2px solid var(--navy);display:grid;grid-template-columns:1fr auto;gap:20px;align-items:center}.footerbrand{display:flex;align-items:center;gap:10px;text-decoration:none}.footerbrand img{object-fit:contain}.footerbrand b{font-size:18px}footer nav{display:flex;gap:20px}footer>span{grid-column:1/-1;color:var(--muted);font-size:13px}@media(max-width:820px){.top{min-height:70px}.brand img{width:42px;height:42px}.top button{display:block;border:1px solid var(--navy);background:transparent;padding:8px 12px}.top nav{display:none}.top nav.open{display:flex;position:absolute;z-index:20;top:70px;left:12px;right:12px;background:var(--navy);color:white;flex-direction:column;align-items:stretch;padding:22px}.hero{display:block;min-height:auto;padding:70px 0}.hero h1{font-size:56px}.hero aside{margin-top:40px}.dimensions header,.latest header{display:block}.dimensions h2,.latest h2{font-size:38px;margin-top:12px}.dimensions>div,.latest>div,.topicgrid,.editorial>div,.about>div{grid-template-columns:1fr}.latest a:nth-child(odd){border-right:0}.disclosure{grid-template-columns:1fr}.indexlist a{grid-template-columns:45px 1fr}.indexlist a>span{grid-column:2}.indexlist p{grid-column:2}.toc ol{columns:1}.calc form{grid-template-columns:1fr}.calc output b{font-size:48px}footer{display:block}footer nav{display:grid;grid-template-columns:1fr 1fr;margin:25px 0}.article h1{font-size:44px}.prose h2{font-size:29px}}

/* batch6-topic-v2 */
.topichead{max-width:1040px}.topichead h1{font-size:clamp(44px,6.5vw,78px)}.topichead p{max-width:900px;line-height:1.9}.topicbrief{display:grid;grid-template-columns:1.25fr .75fr;gap:1px;background:var(--line);border:1px solid var(--line);margin:50px 0 12px}.topicbrief article{background:var(--white);padding:34px}.topicbrief b,.topicnote b{display:block;color:#9a5a00;margin-bottom:12px}.topicbrief p,.topicbrief ol{margin:0}.topicbrief li{margin:8px 0}.topicgrid{padding-top:24px}.topicgrid a{display:flex;flex-direction:column;min-height:280px}.topicgrid a>span{font:700 12px Consolas,monospace;letter-spacing:.12em}.topicgrid a h2{margin:.55em 0}.topicgrid a p{flex:1}.topicgrid a strong{color:#9a5a00}.topicnote{margin:0 0 90px;padding:34px;background:var(--navy);color:white}.topicnote p{max-width:900px;margin:0}.dimensions a p{font-size:14px;line-height:1.65}.top nav{gap:16px}
@media(max-width:820px){.topicbrief{grid-template-columns:1fr}.topicgrid a{min-height:auto}.topichead h1{font-size:43px}.top nav{gap:0}}
