:root{--ink:#272a23;--muted:#686d60;--paper:#f8f7f1;--line:#dedfd5;--sage:#66715e}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:16px/1.65 Arial,"Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}img{max-width:100%;display:block}h1,h2,p{margin:0 0 20px}h1{font:400 clamp(30px,3.1vw,52px)/1.2 Georgia,"Songti SC",serif;overflow-wrap:anywhere}h2{font-size:21px;line-height:1.35}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:3px solid var(--sage);outline-offset:5px}.seo-skip{position:absolute;left:20px;top:-100px;background:white;padding:10px;z-index:10}.seo-skip:focus{top:10px}.seo-header{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:25px max(24px,5vw);border-bottom:1px solid var(--line)}.seo-header img{width:190px;height:auto}.seo-header nav{display:flex;gap:22px;font-size:14px}.seo-languages{white-space:nowrap}.seo-languages [aria-current]{text-decoration:underline;text-underline-offset:5px}.seo-main{max-width:1440px;margin:auto;padding:0 44px 64px}.seo-breadcrumb{font-size:12px;color:var(--muted);padding:24px 0}.seo-breadcrumb ol{display:flex;flex-wrap:wrap;gap:7px 12px;list-style:none;padding:0;margin:0}.seo-breadcrumb li:not(:last-child):after{content:' /';margin-left:12px;opacity:.6}.seo-intro{max-width:840px;margin:24px 0 36px}.seo-intro>p:not(.seo-kicker){color:var(--muted);font-size:18px}.seo-kicker{text-transform:uppercase;letter-spacing:.1em;font-size:11px;color:var(--muted);margin-bottom:16px}.seo-intro>span{font-size:13px;color:var(--muted)}.seo-category-links{display:flex;gap:10px;flex-wrap:wrap;margin:30px 0}.seo-category-links a{font-size:12px;border:1px solid var(--line);padding:8px 12px}.seo-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:36px 24px}.seo-card img{width:100%;height:auto;aspect-ratio:1;object-fit:contain;background:#fff;margin-bottom:18px}.seo-card h2{font:400 22px/1.35 Georgia,"Songti SC",serif;margin-bottom:14px}.seo-card span{font-size:12px;text-decoration:underline;text-underline-offset:5px}.seo-card .seo-kicker{margin-bottom:9px}.seo-product{display:grid;grid-template-columns:1.05fr 1fr;gap:clamp(28px,5vw,74px);align-items:start;padding:16px 0 50px}.seo-product-photo{position:sticky;top:24px;background:white}.seo-product-photo img{width:100%;height:auto;aspect-ratio:1;object-fit:contain}.seo-description{color:var(--muted);font-size:17px}.seo-product-copy h2{margin:28px 0 14px}.seo-specs{margin:0}.seo-specs div{display:grid;grid-template-columns:minmax(100px,.65fr) 1fr;gap:20px;padding:10px 0;border-bottom:1px solid var(--line);font-size:14px}.seo-specs dt{color:var(--muted)}.seo-specs dd{margin:0}.seo-actions{display:flex;align-items:center;gap:18px;flex-wrap:wrap;margin-top:28px;font-size:14px}.seo-button{display:inline-flex;justify-content:center;background:var(--ink);color:white;padding:14px 22px}.seo-buying{border-block:1px solid var(--line);padding:32px 0;margin:0 0 44px}.seo-buying p{max-width:870px;color:var(--muted);margin:0}.seo-related>h2{margin-bottom:24px}.seo-services{margin-top:55px;padding:32px 0;border-block:1px solid var(--line)}.seo-services>div{display:flex;flex-wrap:wrap;gap:18px 30px}.seo-services a{text-decoration:underline;text-underline-offset:5px}.seo-footer{padding:35px max(24px,5vw);background:#edeee5;font-size:13px}.seo-footer p{margin-bottom:10px}.seo-footer>div{margin-top:15px}.seo-footer button{border:0;background:none;padding:0;text-decoration:underline}.analytics-choice{position:fixed;left:16px;bottom:16px;z-index:100;max-width:390px;width:calc(100% - 32px);background:white;padding:16px;border:1px solid var(--line);box-shadow:0 5px 22px #0001;font-size:12px;border-radius:10px}.analytics-choice[hidden]{display:none}.analytics-choice p{margin-bottom:10px}.analytics-choice>div{display:flex;gap:10px;align-items:center}.analytics-choice button{padding:8px 12px;background:var(--paper);border:1px solid var(--line);border-radius:4px}
.seo-header img{height:48px;object-fit:cover;object-position:50% 52.5%;mix-blend-mode:multiply}
.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px;margin:32px 0 48px}.guide-card{border:1px solid var(--line);background:#fff}.guide-card img{width:100%;height:260px;object-fit:contain;padding:20px}.guide-card> a{display:block;height:100%}.guide-card> a>div{padding:24px}.guide-card h2{font:400 26px/1.3 Georgia,"Songti SC",serif}.guide-card p{font-size:14px;color:var(--muted)}.guide-card span{font-size:13px;text-decoration:underline}.guide-heading{max-width:1020px;margin:22px 0 38px}.guide-meta{font-size:12px;color:var(--muted)}.guide-lead{font-size:19px;max-width:920px}.guide-layout{display:grid;grid-template-columns:230px minmax(0,800px);gap:clamp(30px,6vw,90px);align-items:start}.guide-toc{position:sticky;top:28px;font-size:13px;border-top:2px solid var(--sage);padding-top:18px}.guide-toc h2{font-size:16px}.guide-toc ol{padding-left:20px}.guide-toc li{margin:0 0 14px}.guide-toc a:hover,.guide-body a:hover{text-decoration:underline}.guide-body section{scroll-margin-top:26px;margin-bottom:38px}.guide-body h2{font-size:25px}.guide-body p,.guide-body li{line-height:1.85}.guide-body ul{padding-left:22px}.guide-body li{margin-bottom:12px}.guide-brief{padding:28px;background:#ecede4;border:1px solid var(--line)}.guide-brief pre{font:inherit;white-space:pre-wrap;overflow-wrap:anywhere;line-height:2;margin:0 0 24px}.guide-basis{font-size:13px;color:var(--muted)}.guide-references{margin-top:42px;padding-top:34px;border-top:1px solid var(--line)}.guide-references h3{font:400 21px/1.4 Georgia,"Songti SC",serif}.guide-category{display:inline-block;margin-top:25px;text-decoration:underline}.seo-guide-links{margin-top:28px;display:flex;flex-wrap:wrap;gap:16px 26px;font-size:14px}.seo-guide-links a{text-decoration:underline;text-underline-offset:4px}
@media(max-width:900px){.guide-layout{grid-template-columns:190px minmax(0,1fr);gap:30px}.guide-grid{gap:16px}.guide-card> a>div{padding:18px}.guide-card h2{font-size:23px}.guide-card img{height:220px}}
@media(max-width:680px){.guide-grid{grid-template-columns:1fr;gap:22px}.guide-card img{height:210px}.guide-card h2{font-size:25px}.guide-heading{margin:14px 0 24px}.guide-heading h1{font-size:32px}.guide-lead{font-size:16px}.guide-layout{grid-template-columns:1fr;gap:28px}.guide-toc{position:static}.guide-toc ol{margin-bottom:15px}.guide-toc li{margin-bottom:8px}.guide-body h2{font-size:23px}.guide-brief{padding:20px}.guide-brief .seo-button{font-size:14px}.guide-body p,.guide-body li{font-size:16px}.guide-references h3{font-size:18px}.seo-guide-links{flex-direction:column}}
@media(max-width:680px){.seo-main .seo-category-links{flex-wrap:nowrap;overflow-x:auto;padding-bottom:8px}.seo-main .seo-category-links a{flex:0 0 auto;white-space:nowrap}}
@media(max-width:1000px){.seo-header{flex-wrap:wrap;padding:20px 28px}.seo-header>nav:not(.seo-languages){order:3;width:100%}.seo-main{padding-inline:28px}.seo-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.seo-product{gap:28px}.seo-product h1{font-size:34px}}
@media(max-width:680px){.seo-header{padding:18px 20px;gap:16px}.seo-header img{width:148px}.seo-header nav{gap:14px;font-size:11px}.seo-main{padding:0 20px 30px}.seo-breadcrumb{padding:18px 0;font-size:10px}.seo-intro{margin:16px 0 24px}.seo-intro>p:not(.seo-kicker){font-size:15px}.seo-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:28px 14px}.seo-card h2{font-size:18px}.seo-kicker{font-size:10px}.seo-product{grid-template-columns:1fr;padding-top:0;gap:26px}.seo-product-photo{position:static}.seo-product h1{font-size:32px}.seo-description{font-size:15px}.seo-actions{align-items:stretch;flex-direction:column;gap:14px}.seo-actions>a{text-align:center}.seo-category-links{gap:7px}.seo-category-links a{font-size:11px;padding:6px 9px}.seo-footer{padding:28px 20px;overflow-wrap:anywhere}.seo-services{margin-top:36px}}