:root{--navy:#263746;--blue:#6e879a;--pale:#e8eef0;--paper:#f8f6ef;--red:#e34a32;--ink:#1d262d;--muted:#6d777d;--line:#aab7bd;--white:#fff;--mono:"Courier New",Consolas,monospace;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
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.manual-rail{height:28px;background:var(--navy);color:#dfe7ea;display:flex;justify-content:space-between;align-items:center;padding:0 24px;font:10px var(--mono);letter-spacing:1.5px}.manual-head{background:rgba(248,246,239,.96);border-bottom:1px solid var(--navy);position:sticky;top:0;z-index:50}.head-grid{height:84px;display:flex;align-items:center;gap:36px}.manual-logo{display:flex;align-items:center;gap:12px;flex-shrink:0}.manual-logo>span{display:grid;place-items:center;width:46px;height:46px;background:var(--red);color:#fff;font:700 18px var(--mono);transform:rotate(-3deg)}.manual-logo strong{font-size:22px;line-height:1.05}.manual-logo small{display:block;margin-top:6px;color:var(--blue);font:9px var(--mono);letter-spacing:1.5px}.manual-nav{display:flex;justify-content:center;gap:14px;flex:1;min-width:0;list-style:none;margin:0;padding:0}.manual-nav>li{position:relative}.manual-nav>li>a{display:block;padding:14px 4px;font-size:13px;font-weight:700;white-space:nowrap}.manual-nav .nav-sub{display:none;position:absolute;top:100%;left:0;min-width:178px;max-height:360px;overflow-y:auto;background:#fff;border:1px solid var(--navy);box-shadow:0 8px 20px rgba(0,0,0,.14);padding:6px 0;list-style:none;margin:0;z-index:200}.manual-nav .nav-sub a{display:block;padding:9px 16px;font-size:12px;font-weight:600;white-space:nowrap}.manual-nav .nav-sub a:hover{background:var(--pale);color:var(--red)}.manual-nav .nav-sub.open{display:block}.manual-search{display:flex;width:175px;border-bottom:1px solid var(--navy);flex-shrink:0}.manual-search input{width:100%;min-width:0;background:transparent;border:0;outline:0;padding:7px 2px;font-size:12px}.manual-search button{border:0;background:transparent}.menu-trigger{display:none;width:42px;height:42px;border:1px solid var(--navy);background:transparent}
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.article-head{background:var(--navy);color:#fff;padding:75px 0}.article-head p{color:#c7d1d6}.article-head .manual-shell>div{display:flex;gap:20px;font:10px var(--mono)}.article-columns{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:50px;padding:60px 0 90px}.procedure-article{background:#fff;padding:48px 55px;min-width:0}.article-lead{font-size:20px;font-weight:700;border-left:4px solid var(--red);padding-left:20px}.article-body{line-height:2}.article-body h2{font-size:26px;margin:38px 0 12px}.procedure-box{display:grid;grid-template-columns:65px 1fr;background:#fce5e0;border:1px solid var(--red);padding:18px;margin:30px 0}.procedure-box b{font:700 18px var(--mono);color:var(--red)}.procedure-box p{margin:0}.article-summary{margin:38px 0;padding:22px;background:var(--pale);border-left:4px solid var(--red)}.article-summary-head{display:flex;gap:10px;align-items:center}.summary-deco{font:10px var(--mono);color:var(--red)}.article-summary-title{margin:0}.article-summary-cite{display:flex;gap:8px;border-top:1px dashed var(--line);padding-top:10px;font-size:12px}.cite-label{flex-shrink:0}.cite-text{flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;background:#fff;padding:3px 7px}.article-switch{display:grid;grid-template-columns:1fr 1fr;border-top:1px solid var(--navy);padding-top:20px}.article-switch a:last-child{text-align:right}.article-switch span{display:block;color:var(--muted);font-size:11px}.gear-register{margin-top:55px;margin-bottom:30px;border:1px solid var(--navy)}.register-head,.gear-register>a{display:grid;grid-template-columns:90px 1.1fr 1.35fr 1.65fr .8fr}.register-head{background:var(--navy);color:#fff;font:10px var(--mono)}.register-head>b,.gear-register>a>*{padding:15px;border-right:1px solid var(--line);margin:0;font-style:normal}.gear-register>a{border-bottom:1px solid var(--line);align-items:center}.gear-register>a:last-child{border-bottom:0}.gear-register>a>*:last-child{border-right:0}.gear-register strong{font:700 18px var(--mono);color:var(--red)}.gear-register span{font-weight:700}.gear-register span i{width:26px;color:var(--navy)}.gear-register p,.gear-register small{color:var(--muted)}.no-shop-note{display:flex;gap:20px;background:var(--pale);padding:20px;margin-bottom:85px}.no-shop-note b{font:700 11px var(--mono);color:var(--red);flex-shrink:0}.no-shop-note p{margin:0}.product-manual-head{background:var(--pale);border-bottom:1px solid var(--navy);padding:55px 0}.product-manual-head>.manual-shell{display:grid;grid-template-columns:1fr 380px;gap:60px;align-items:center}.product-manual-head h1{font-size:43px}.product-manual-head p{font:10px var(--mono);color:var(--blue)}.stove-diagram{display:grid;grid-template-columns:55px 35px 1fr;align-items:center;border:1px solid var(--navy);padding:20px}.stove-diagram i{grid-row:span 4;font-size:50px;color:var(--red)}.stove-diagram b{font-family:var(--mono);color:var(--red)}.product-manual{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:50px;padding:60px 0 85px}.product-manual main{min-width:0}.product-manual main>section{border-top:1px solid var(--navy);padding:27px 0}.product-manual h2{font-size:28px}.spec-list>div{display:grid;grid-template-columns:140px 1fr;border-bottom:1px solid var(--line);padding:11px}.pack-parts{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--navy)}.pack-parts article{padding:18px;border-right:1px solid var(--navy)}.pack-parts article:last-child{border:0}.pack-parts b{font-family:var(--mono);color:var(--red)}.pack-parts h3{font-size:17px}.pack-parts p{font-size:12px;color:var(--muted)}.gear-notice{background:var(--navy);color:#fff;padding:20px}.gear-notice p{margin:5px 0;color:#c9d2d6}
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.manual-footer{background:var(--navy);color:#d3dce0;padding-top:55px}.footer-board{display:grid;grid-template-columns:1fr 1fr;gap:70px;padding-bottom:40px}.footer-board>div>span{font:10px var(--mono);color:#ff8a75}.footer-board h2{font-size:32px;color:#fff}.footer-board p{max-width:550px}.footer-links{display:grid;grid-template-columns:1fr 1fr}.footer-links a{padding:9px 0;border-bottom:1px solid rgba(255,255,255,.2)}.footer-meta{display:flex;justify-content:space-between;border-top:1px solid rgba(255,255,255,.2);padding-top:16px;padding-bottom:16px;font-size:11px}.footer-meta a{color:#d3dce0}#back-to-top{position:fixed;right:22px;bottom:22px;width:43px;height:43px;border:0;background:var(--red);color:#fff;opacity:0;pointer-events:none;z-index:40}#back-to-top.visible{opacity:1;pointer-events:auto}
@media(max-width:1050px){.manual-nav{gap:14px}.manual-search{display:none}.cover-grid{grid-template-columns:130px 1fr 320px}.cover-copy{padding:55px 35px}.cover-copy h1{font-size:52px}.handbook-grid{grid-template-columns:repeat(3,1fr)}.priority-board{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){.manual-shell{width:calc(100% - 32px)}.head-grid{height:auto;min-height:76px;flex-wrap:wrap;padding:12px 0}.menu-trigger{display:block;margin-left:auto}.manual-nav{display:none;order:4;flex-basis:100%;flex-direction:column;align-items:stretch}.manual-nav.open{display:flex}.manual-nav a{padding:10px 0;border-top:1px solid var(--line)}.cover-grid{grid-template-columns:95px 1fr}.kit-outline{grid-column:span 2;border-top:1px solid var(--navy);grid-template-columns:repeat(3,1fr)}.kit-outline .kit-tarp{grid-column:auto}.manual-ticker>.manual-shell{grid-template-columns:1fr 1fr}.section-heading{align-items:flex-start;gap:20px}.system-lines article{grid-template-columns:110px 150px minmax(0,1fr)}.system-lines article>a{display:none}.sequence-table>div{grid-template-columns:65px 1fr 1fr}.sequence-table>div>*:last-child{display:none}.page-columns,.article-columns,.product-manual,.contact-columns{grid-template-columns:1fr}.page-aside{display:grid;grid-template-columns:1fr 1fr;gap:20px}.product-manual-head>.manual-shell{grid-template-columns:1fr}.blueprint-gallery{grid-template-columns:1fr 1fr}.gear-register>a,.register-head{grid-template-columns:70px 1fr 1.3fr}.gear-register>a>*:nth-child(4),.gear-register>a>*:nth-child(5),.register-head>*:nth-child(4),.register-head>*:nth-child(5){display:none}.pack-parts{grid-template-columns:1fr 1fr}.priority-board{grid-template-columns:1fr 1fr}.footer-board{gap:30px}}
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/* 导航子菜单：桌面 hover 显示 */
@media(min-width:821px){.manual-nav>li:hover>.nav-sub{display:block}.manual-nav>li:hover>a{color:var(--red)}}
/* 导航子菜单：移动端点击展开 */
@media(max-width:820px){.manual-nav .nav-sub{position:static;min-width:0;border:0;box-shadow:none;background:transparent;padding:0 0 2px 20px}.manual-nav .nav-sub a{padding:8px 0;border-top:0;font-size:12px}}