
.knowledge-bottom-space{height:72px}@media(max-width:520px){.knowledge-bottom-space{height:52px}}
:root{--blue:#356cff;--blue-dark:#2457df;--ink:#172337;--muted:#6f7f93;--line:#e1e5eb;--soft:#f5f8fc}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;margin:0;color:var(--ink);background:#fff;font-family:"Microsoft YaHei","Segoe UI",sans-serif;line-height:1.75}a{color:inherit}.topbar{min-height:50px;display:flex;align-items:center;gap:24px;padding:0 22px;color:#202936;background:#f5f6f8;border-bottom:1px solid var(--line)}.brand{min-width:180px;display:flex;align-items:center;color:#202936;text-decoration:none}.brand strong,.brand small{display:block}.brand strong{color:#121923;font-size:16px;font-weight:600}.brand small{margin-top:1px;color:#88929e;font-size:10px}.topbar nav{min-height:50px;display:flex;align-self:stretch;gap:0;flex:1;overflow-x:auto}.topbar nav a{display:flex;align-items:center;padding:0 15px;color:#53606d;border-top:2px solid transparent;text-decoration:none;font-size:12px;white-space:nowrap}.topbar nav a[hidden]{display:none}.topbar nav a:hover{color:var(--blue);background:#fafbff}.topbar nav a.active{color:var(--blue);background:#fff;border-top-color:var(--blue);font-weight:600}.button{min-height:33px;display:flex;align-items:center;padding:0 14px;border:1px solid transparent;border-radius:2px;font:inherit;font-size:12px;font-weight:600;text-decoration:none;white-space:nowrap}.button.secondary{color:#4b5664;background:#fff;border-color:#d7dce3}.button.secondary:hover{color:var(--blue);border-color:#aebde8}#article-account-button{flex:0 0 auto}.knowledge-shell,.article-detail-shell{width:min(1240px,calc(100% - 44px));margin:0 auto}.knowledge-hero{min-height:280px;display:grid;grid-template-columns:minmax(0,1fr) minmax(380px,.72fr);align-items:center;gap:70px;padding:54px 0}.knowledge-hero>div>p,.knowledge-results-heading p,.related-articles header p{margin:0;color:var(--blue);font-size:12px;font-weight:700}.knowledge-hero h1{margin:8px 0 0;font-size:42px;line-height:1.25}.knowledge-hero>div>span{display:block;margin-top:13px;color:var(--muted);font-size:14px}.knowledge-search label{display:block;margin-bottom:8px;color:#4e6078;font-size:12px}.knowledge-search>div{display:grid;grid-template-columns:minmax(0,1fr) 88px;height:48px}.knowledge-search input{min-width:0;padding:0 15px;border:1px solid #cdd8e7;border-right:0;border-radius:3px 0 0 3px;font:inherit}.knowledge-search button{color:#fff;background:var(--blue);border:0;border-radius:0 3px 3px 0;font:inherit;cursor:pointer}.knowledge-categories{display:flex;gap:7px;padding:12px;background:var(--soft);border:1px solid var(--line);overflow-x:auto}.knowledge-categories a{display:flex;align-items:center;gap:7px;padding:8px 13px;color:#53657c;background:#fff;border:1px solid #dfe6ef;border-radius:3px;text-decoration:none;font-size:12px;white-space:nowrap}.knowledge-categories a.active{color:#fff;background:var(--blue);border-color:var(--blue)}.knowledge-categories span{opacity:.72}.featured-article{min-height:330px;display:grid;grid-template-columns:minmax(0,1.15fr) minmax(300px,.85fr);margin-top:28px;overflow:hidden;background:#1269d7}.featured-article>div{padding:48px;color:#fff}.featured-article>div>p{margin:0;color:#d5e9ff;font-size:12px}.featured-article>div>p span{margin-right:9px;padding:4px 8px;color:#1769dc;background:#fff}.featured-article h2{max-width:720px;margin:20px 0 0;font-size:30px;line-height:1.45}.featured-article h2 a{text-decoration:none}.featured-article>div>div{max-width:730px;margin-top:14px;color:#dcecff;font-size:14px}.featured-article footer{display:flex;align-items:center;justify-content:space-between;gap:20px;margin-top:32px;color:#c8e1ff;font-size:12px}.featured-article footer a{color:#1769dc;background:#fff;padding:10px 17px;text-decoration:none}.featured-article aside{display:flex;align-items:center;justify-content:center;flex-direction:column;color:#fff;background:#0b85e5}.featured-article aside strong{font-size:72px;line-height:1}.featured-article aside span{margin-top:14px;font-size:13px}.knowledge-results-heading{display:flex;align-items:flex-end;justify-content:space-between;margin:58px 0 24px}.knowledge-results-heading h2,.related-articles h2{margin:5px 0 0;font-size:28px}.knowledge-results-heading>span{color:var(--muted);font-size:12px}.knowledge-grid,.related-articles>div{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.knowledge-card{min-width:0;min-height:280px;display:flex;flex-direction:column;padding:25px;background:#fff;border:1px solid var(--line);transition:transform .2s ease,box-shadow .2s ease}.knowledge-card:hover{transform:translateY(-3px);box-shadow:0 14px 34px rgba(29,73,129,.1)}.knowledge-card-top{display:flex;justify-content:space-between;gap:12px;color:#8491a1;font-size:11px}.knowledge-card-top span{color:var(--blue)}.knowledge-card h2{margin:19px 0 0;font-size:19px;line-height:1.5}.knowledge-card h2 a{text-decoration:none}.knowledge-card>p{margin:12px 0 0;color:var(--muted);font-size:12px;line-height:1.85}.knowledge-card footer{display:grid;grid-template-columns:auto auto 1fr;align-items:center;gap:10px;margin-top:auto;padding-top:24px;color:#8a96a4;font-size:10px}.knowledge-card footer a{justify-self:end;color:var(--blue);font-size:12px;text-decoration:none}.knowledge-empty{grid-column:1/-1;padding:70px 20px;text-align:center;background:var(--soft);border:1px dashed #cbd7e7}.knowledge-empty strong{font-size:20px}.knowledge-empty p{color:var(--muted)}.knowledge-empty a{color:var(--blue)}.knowledge-pagination{display:flex;justify-content:center;gap:7px;margin:36px 0 74px}.knowledge-pagination a{width:36px;height:36px;display:grid;place-items:center;color:#53657c;border:1px solid var(--line);text-decoration:none}.knowledge-pagination a.active{color:#fff;background:var(--blue);border-color:var(--blue)}.article-detail-shell{padding:34px 0 80px}.breadcrumbs{display:flex;gap:9px;align-items:center;color:#7a899b;font-size:12px}.breadcrumbs a{text-decoration:none}.article-head{max-width:950px;margin:52px auto 0;text-align:center}.article-head>p{margin:0;color:#8492a2;font-size:12px}.article-head>p span{margin-right:12px;color:var(--blue)}.article-head h1{margin:18px 0 0;font-size:42px;line-height:1.35}.article-head>div{max-width:800px;margin:18px auto 0;color:var(--muted);font-size:15px}.article-head footer{display:flex;justify-content:center;gap:22px;margin-top:24px;color:#8b97a5;font-size:11px}.article-reading-layout{max-width:1100px;display:grid;grid-template-columns:190px minmax(0,820px);gap:48px;margin:58px auto 0;align-items:start}.article-toc{position:sticky;top:24px;padding:18px;border-left:2px solid #dbe6f5}.article-toc strong{font-size:13px}.article-toc nav{display:grid;gap:8px;margin-top:14px}.article-toc a{color:#6d7d91;text-decoration:none;font-size:11px;line-height:1.55}.article-toc a.level-3{padding-left:12px}.article-toc a:hover{color:var(--blue)}.article-content{min-width:0;font-size:16px;line-height:1.95}.article-content>:first-child{margin-top:0}.article-content h2,.article-content h3{scroll-margin-top:24px;color:#1b2b42;line-height:1.4}.article-content h2{margin:48px 0 18px;padding-bottom:10px;border-bottom:1px solid var(--line);font-size:27px}.article-content h3{margin:34px 0 14px;font-size:21px}.article-content p{margin:0 0 20px}.article-content a{color:var(--blue)}.article-content blockquote{margin:24px 0;padding:16px 20px;color:#53657a;background:#f2f7fd;border-left:3px solid var(--blue)}.article-content blockquote p{margin:0}.article-content pre{max-width:100%;padding:20px;overflow:auto;color:#e5edf7;background:#172337;border-radius:3px;line-height:1.65}.article-content code{font-family:Consolas,monospace}.article-content :not(pre)>code{padding:2px 5px;color:#be3f31;background:#fff1ef}.article-content table{width:100%;border-collapse:collapse;margin:24px 0;font-size:13px}.article-content th,.article-content td{padding:10px 12px;border:1px solid #dce4ee;text-align:left}.article-content th{background:#f2f6fb}.article-content img{max-width:100%;height:auto}.article-conversion{max-width:1100px;display:flex;align-items:center;justify-content:space-between;gap:32px;margin:70px auto 0;padding:34px 38px;color:#fff;background:#1769dc}.article-conversion p{margin:0;color:#cfe5ff;font-size:11px}.article-conversion h2{margin:6px 0 0;font-size:22px}.article-conversion>div:last-child{display:flex;gap:9px}.article-conversion a{padding:10px 15px;border:1px solid rgba(255,255,255,.6);text-decoration:none;font-size:12px}.article-conversion a.primary{color:var(--blue);background:#fff;border-color:#fff}.article-neighbors{max-width:1100px;display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:24px auto 0}.article-neighbors>a{display:grid;padding:20px;border:1px solid var(--line);text-decoration:none}.article-neighbors a.next{text-align:right}.article-neighbors span{color:#8290a1;font-size:10px}.article-neighbors strong{margin-top:5px;font-size:13px}.related-articles{max-width:1100px;margin:70px auto 0}.related-articles header{margin-bottom:22px}.article-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:32px max(22px,calc((100% - 1240px)/2));color:#d2deee;background:#182538}.article-footer strong,.article-footer span{display:block}.article-footer span{margin-top:4px;color:#8fa2bc;font-size:10px}.article-footer nav{display:flex;gap:20px}.article-footer a{color:#c3d0e1;text-decoration:none;font-size:12px}@media(max-width:850px){.topbar{flex-wrap:wrap;gap:8px;padding:9px 14px}.brand{min-width:0;flex:1}.topbar nav{order:3;width:100%;min-height:38px}.topbar nav a{min-height:38px;padding:0 12px}.knowledge-shell,.article-detail-shell{width:min(100% - 28px,1240px)}.knowledge-hero{grid-template-columns:1fr;gap:28px;padding:42px 0}.knowledge-hero h1{font-size:33px}.featured-article{grid-template-columns:1fr}.featured-article>div{padding:30px 24px}.featured-article aside{min-height:150px}.featured-article aside strong{font-size:48px}.knowledge-grid,.related-articles>div{grid-template-columns:1fr 1fr}.article-head{margin-top:36px}.article-head h1{font-size:32px}.article-reading-layout{grid-template-columns:1fr;gap:24px;margin-top:40px}.article-toc{position:static;border:1px solid var(--line)}.article-conversion{align-items:flex-start;flex-direction:column}.article-footer{align-items:flex-start;flex-direction:column}}@media(max-width:520px){.brand small{display:none}#article-account-button{display:none}.knowledge-shell,.article-detail-shell{width:min(100% - 24px,1240px)}.knowledge-hero h1{font-size:29px}.knowledge-search>div{grid-template-columns:minmax(0,1fr) 72px}.featured-article h2{font-size:23px}.knowledge-grid,.related-articles>div{grid-template-columns:1fr}.knowledge-card{min-height:250px}.knowledge-results-heading h2,.related-articles h2{font-size:23px}.article-head{text-align:left}.article-head h1{font-size:28px}.article-head footer{align-items:flex-start;flex-direction:column;gap:5px}.article-content{font-size:15px}.article-content h2{font-size:23px}.article-content h3{font-size:19px}.article-conversion{padding:28px 22px}.article-conversion>div:last-child{width:100%;display:grid}.article-conversion a{text-align:center}.article-neighbors{grid-template-columns:1fr}.article-footer nav{flex-wrap:wrap}}
