:root{color-scheme:dark;--bg:#000;--layer:#0b0b0b;--secondary:#121212;--hover:#1a1a1a;--text:#ddd;--muted:#a5a5a5;--line:rgba(255,255,255,.12);--edge:rgba(255,255,255,.4)}*{box-sizing:border-box}html{scroll-padding-top:136px}body{margin:0;background:var(--bg);color:var(--text);font:16px/1.76 system-ui,-apple-system,"Microsoft YaHei",sans-serif;overflow-x:hidden}body.overlay-open{overflow:hidden}a{color:inherit;text-decoration:none}a:hover{text-decoration:underline;text-underline-offset:5px}button,input{font:inherit}button{cursor:pointer;color:inherit}button:focus-visible,a:focus-visible,input:focus-visible{outline:2px solid #fff;outline-offset:3px}img{max-width:100%;height:auto;object-fit:contain;object-position:center}h1,h2,h3,p{margin-top:0}h1{font-size:clamp(28px,3vw,34px);line-height:1.28;color:#f7f7f7}h2{font-size:clamp(21px,2vw,26px);line-height:1.4;color:#f7f7f7}h3{font-size:18px;color:#f7f7f7}p{max-width:78ch}small,.muted,.kicker{color:var(--muted)}.wrap{max-width:1240px;margin-inline:auto;padding-inline:clamp(16px,3vw,32px)}.brandbar{background:#050505;border-bottom:1px solid var(--line);position:relative;z-index:30}.brandrow{min-height:72px;display:flex;align-items:center;justify-content:space-between;gap:16px}.brand{display:inline-flex;align-items:center;gap:10px;white-space:nowrap;font-size:23px;font-weight:750;color:#f7f7f7}.brand img{height:32px;width:auto;max-width:100px}.brand-caption{font-size:12px;letter-spacing:.12em;color:var(--muted);text-align:center}.brand-caption span{display:block;letter-spacing:0;font-size:12px}.top-actions{display:flex;gap:6px;align-items:center;flex-shrink:0}.control,.text-button,.btn{display:inline-flex;justify-content:center;align-items:center;min-height:44px;padding:8px 14px;border:1px solid var(--edge);background:transparent;border-radius:6px;color:#f7f7f7;text-align:center}.control:hover,.text-button:hover,.btn:hover{background:var(--hover);text-decoration:none}.btn.primary{background:#fff;color:#000;border-color:#fff}.btn.primary:hover{background:#ddd}.desktop-nav{border-bottom:1px solid var(--line);background:#050505}.navrow{min-height:48px;display:flex;gap:clamp(9px,2.2vw,27px);align-items:center;white-space:nowrap}.navrow a{font-size:14px;padding:10px 0;border-bottom:2px solid transparent}.navrow a.active{border-color:#ddd;color:#fff}.panel{position:absolute;top:100%;left:0;right:0;z-index:60;visibility:hidden;pointer-events:none;opacity:0;background:#121212;border-bottom:1px solid var(--edge);max-height:70dvh;overflow-y:auto;transition:opacity .15s}.panel.open{visibility:visible;pointer-events:auto;opacity:1}.panel-top{display:flex;align-items:center;justify-content:space-between;gap:12px;padding-block:18px}.panel-top h2{margin:0}.menu-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px;padding-bottom:26px}.menu-group h3{padding-bottom:9px;border-bottom:1px solid var(--line)}.menu-item{display:block;padding:9px 0;border-bottom:1px solid var(--line);font-size:15px}.menu-item small{display:block;font-size:12px;line-height:1.5}.searchpanel .wrap{max-width:560px;padding-block:20px}.searchpanel label{display:block;margin-bottom:8px}.searchpanel input{width:100%;min-height:44px;color:#fff;background:#050505;border:1px solid var(--edge);border-radius:6px;padding:8px 12px}.search-links{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}.search-links a{font-size:13px;padding:6px 10px;border:1px solid var(--line);border-radius:5px}.scrim{position:fixed;inset:0;background:rgba(0,0,0,.7);z-index:20;visibility:hidden;pointer-events:none}.scrim.open{visibility:visible;pointer-events:auto}.page{padding-top:34px;padding-bottom:65px;min-height:60vh}.page-heading{padding:14px 0 28px;border-bottom:1px solid var(--line);margin-bottom:28px}.page-heading p{max-width:850px}.kicker{font-size:12px;letter-spacing:.15em;text-transform:uppercase}.buttonrow{display:flex;flex-wrap:wrap;gap:10px;margin-top:18px}.section{padding:32px 0;border-bottom:1px solid var(--line)}.section-head{display:flex;justify-content:space-between;gap:14px;align-items:baseline}.section-head a,.readmore,.content-block>a{color:#f7f7f7;text-decoration:underline;text-underline-offset:5px}.hero-img img{display:block;max-height:300px;width:auto;max-width:100%;margin-inline:auto}.hero-intro{display:grid;grid-template-columns:1fr 1fr;gap:clamp(24px,5vw,70px);padding-top:24px}.hero-intro p{max-width:58ch}.media{margin:0;min-width:0}.media img{display:block;width:auto;max-width:100%;height:auto;margin-inline:auto}.media-banner2 img{max-height:260px}.media-banner3 img{max-height:240px}.media-standard img{max-height:240px}.media-app img{max-height:420px}.media-icon img{max-width:72px;max-height:72px}.quick-grid,.two-grid,.four-grid{display:grid;gap:14px}.quick-grid,.four-grid{grid-template-columns:repeat(4,minmax(0,1fr))}.two-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tile{background:var(--layer);border:1px solid var(--line);border-radius:7px;padding:20px;min-width:0}.tile h3{margin-bottom:8px}.tile p:last-child{margin-bottom:0}.feature-grid{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr);gap:28px;align-items:start}.feature-grid.with-image{grid-template-columns:minmax(0,36%) minmax(0,1fr)}.feature-grid.reverse.with-image{grid-template-columns:minmax(0,1fr) minmax(0,36%)}.feature-grid.reverse.with-image .media{grid-column:2;grid-row:1}.feature-grid.reverse.with-image .feature-copy{grid-column:1;grid-row:1}.news-list,.short-list,.steps{display:grid;gap:12px}.news-list article,.short-list article,.step,.topic-bar{border-top:1px solid var(--line);padding:17px 0}.topic-bar{display:grid;grid-template-columns:minmax(0,210px) 1fr;gap:20px}.topic-bar p{margin-bottom:8px}.step{display:grid;grid-template-columns:80px 1fr;gap:12px}.step-num{color:var(--muted);font-size:24px}.content-block{padding:24px 0;border-bottom:1px solid var(--line);max-width:900px}.content-block p{max-width:79ch}.content-block p:last-child{margin-bottom:0}.article-layout{display:grid;grid-template-columns:minmax(0,810px) minmax(200px,1fr);gap:40px}.side-note{background:var(--secondary);padding:19px;border:1px solid var(--line);height:max-content}.faq-item{padding:19px 0;border-bottom:1px solid var(--line)}.faq-item h2{font-size:19px}.footer{background:#050505;border-top:1px solid var(--line);padding:42px 0 30px}.footer-intro{margin-bottom:24px}.footer-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:16px}.footer-grid h3{font-size:15px}.footer-grid a{display:block;font-size:14px;color:#bbb;padding:3px 0}.footer-end{margin-top:28px;padding-top:20px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}.mobile-bottom{display:none}.status{display:inline-block;border:1px solid var(--edge);padding:3px 10px;border-radius:3px;color:#fff;margin-bottom:9px}.intro-long{max-width:840px}.app-side{max-width:360px}.app-side img{max-height:420px}.notice{border-left:2px solid #bbb;padding:14px 18px;background:#121212}.foot-brand{margin-bottom:12px}
@media(max-width:1050px){.navrow a:nth-child(n+7){display:none}.brand-caption{display:none}.menu-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.footer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}}
@media(max-width:700px){html{scroll-padding-top:72px}.wrap{padding-inline:16px}.brandrow{min-height:60px;gap:7px}.brand{font-size:19px;gap:5px}.brand img{height:28px;max-width:57px}.top-actions{gap:3px}.top-actions .control,.top-actions .btn{padding:6px 8px;font-size:13px;min-width:44px}.desktop-nav{display:none}.menu-grid{grid-template-columns:minmax(0,1fr);gap:4px}.menu-group h3{margin:12px 0 4px}.panel{max-height:70dvh}.page{padding-top:20px;padding-bottom:95px}.hero-intro,.feature-grid,.feature-grid.with-image,.feature-grid.reverse.with-image,.article-layout{display:block}.feature-grid .media{margin-bottom:20px}.feature-grid.reverse.with-image .media,.feature-grid.reverse.with-image .feature-copy{grid-column:auto;grid-row:auto}.quick-grid,.four-grid,.two-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tile{padding:15px}.topic-bar{grid-template-columns:1fr;gap:2px}.footer{padding-bottom:95px}.footer-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.mobile-bottom{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));position:fixed;z-index:15;bottom:0;left:0;right:0;min-height:56px;padding-bottom:env(safe-area-inset-bottom);background:#111;border-top:1px solid var(--edge)}.mobile-bottom a,.mobile-bottom button{min-height:56px;display:flex;align-items:center;justify-content:center;background:none;border:0;font-size:12px;color:#ddd;text-align:center;padding:3px}.mobile-bottom .active{color:#fff;border-top:2px solid #fff}.media-app img{max-height:360px}}
@media(max-width:370px){.brand{font-size:17px}.top-actions .control,.top-actions .btn{font-size:12px;padding:5px 6px}.quick-grid{grid-template-columns:1fr}.footer-grid{gap:8px}}@media(prefers-reduced-motion:reduce){.panel{transition:none}}