.learning-public{--learn-ink:#10213b;--learn-muted:#586a80;--learn-line:#dce3ed;--learn-blue:#174cff;--learn-soft:#f5f7fc;color:var(--learn-ink);background:#fff;min-height:65vh;font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif}.learning-public *,.learning-markdown *{box-sizing:border-box}.learning-public a{color:var(--learn-blue);text-underline-offset:4px}.learning-public :focus-visible,.learning-markdown :focus-visible{outline-offset:4px;outline:2px solid #174cff}.learning-shell{max-width:1280px;margin:0 auto;padding:0 40px 88px}.learning-intro{justify-content:space-between;align-items:flex-end;gap:32px;padding:50px 0 42px;display:flex}.learning-eyebrow{color:#174cff;font-size:13px;font-weight:650}.learning-intro h1,.learning-series-intro h1{letter-spacing:-.045em;margin:12px 0 16px;font-size:clamp(30px,3.5vw,44px);font-weight:750;line-height:1.25}.learning-intro p{max-width:720px;color:var(--learn-muted);margin:0;font-size:17px;line-height:1.8}.learning-intro-links{flex-direction:column;flex-shrink:0;align-items:flex-start;display:flex}.learning-text-link{flex-shrink:0;align-items:center;gap:12px;min-height:44px;font-size:15px;font-weight:600;text-decoration:none;display:inline-flex}.learning-text-link:hover{text-decoration:underline}.learning-section-heading{flex-wrap:wrap;justify-content:space-between;align-items:baseline;gap:12px;padding:0 0 20px;display:flex}.learning-section-heading h2{letter-spacing:-.025em;margin:0;font-size:25px;font-weight:720}.learning-section-heading p,.learning-section-heading>span{color:var(--learn-muted);margin:0;font-size:14px}.learning-featured{padding-bottom:48px}.learning-featured-grid{border:1px solid var(--learn-line);grid-template-columns:repeat(3,minmax(0,1fr));display:grid}.learning-featured-card{border-left:1px solid var(--learn-line);flex-direction:column;align-items:flex-start;min-width:0;padding:25px 25px 20px;display:flex}.learning-featured-card:first-child{border-left:0}.learning-series-label{font-size:13px;font-weight:550;text-decoration:none}.learning-featured-card h3{letter-spacing:-.025em;margin:12px 0 10px;font-size:22px;line-height:1.45}.learning-featured-card h3 a,.learning-series-card h3 a{color:var(--learn-ink);text-decoration:none;display:block}.learning-featured-card h3 a:hover,.learning-series-card h3 a:hover{color:var(--learn-blue)}.learning-featured-card>p{color:var(--learn-muted);margin:0 0 22px;font-size:15px;line-height:1.8}.learning-card-bottom{width:100%;color:var(--learn-muted);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:12px;margin-top:auto;font-size:13px;display:flex}.learning-card-bottom a{align-items:center;gap:10px;min-height:40px;text-decoration:none;display:inline-flex}.learning-series-catalog{border-top:2px solid var(--learn-ink);padding-top:28px}#learning-catalog-title{scroll-margin-top:108px}.learning-search{margin:0 0 18px}.learning-search label{margin-bottom:8px;font-size:14px;font-weight:600;display:block}.learning-search>div{max-width:660px;display:flex}.learning-search input[type=search]{width:100%;min-width:0;min-height:48px;font:inherit;color:var(--learn-ink);background:#fff;border:1px solid #bcc8d8;border-radius:4px 0 0 4px;padding:10px 15px;font-size:16px}.learning-search button,.learning-primary{min-height:46px;font:inherit;cursor:pointer;background:#174cff;border:1px solid #174cff;border-radius:4px;justify-content:center;align-items:center;gap:12px;padding:10px 22px;font-size:15px;font-weight:600;text-decoration:none;display:inline-flex;color:#fff!important}.learning-search button{border-radius:0 4px 4px 0;flex-shrink:0}.learning-search button:hover,.learning-primary:hover{background:#123dcf}.learning-domains{flex-wrap:wrap;align-items:center;gap:6px 10px;margin-bottom:24px;display:flex}.learning-domains a{min-height:42px;color:var(--learn-muted);border-radius:3px;align-items:center;padding:7px 13px;font-size:14px;text-decoration:none;display:inline-flex}.learning-domains a[aria-current],.learning-domains a:hover{color:#174cff;background:#edf1ff}.learning-series-grid{grid-template-columns:repeat(2,minmax(0,1fr));column-gap:44px;display:grid}.learning-series-card{border-top:1px solid var(--learn-line);min-width:0;padding:25px 0 23px}.learning-series-card__heading{color:var(--learn-muted);justify-content:space-between;gap:16px;font-size:13px;display:flex}.learning-series-card__heading>:first-child{color:#174cff}.learning-series-card h3{letter-spacing:-.035em;margin:13px 0 10px;font-size:25px;line-height:1.4}.learning-series-card>p{max-width:530px;color:var(--learn-muted);margin:0 0 12px;font-size:16px;line-height:1.8}.learning-series-card__footer{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:8px 18px;display:flex}.learning-series-card__footer>span{color:var(--learn-muted);font-size:12px}.learning-matched-articles{border-block:1px solid var(--learn-line);margin:18px 0;padding:16px 0;font-size:14px}.learning-matched-articles h4{margin:0 0 8px;font-size:14px}.learning-matched-articles h4 span{color:var(--learn-muted);margin-left:10px;font-weight:400}.learning-matched-articles ul{margin:0;padding:0;list-style:none}.learning-matched-articles a{align-items:center;gap:12px;min-height:44px;line-height:1.6;display:inline-flex}.learning-empty{border-top:1px solid var(--learn-line);padding:40px 0 52px}.learning-empty h3{font-size:22px}.learning-empty p{color:var(--learn-muted);line-height:1.8}.learning-pagination{border-top:1px solid var(--learn-line,#dce3ed);color:var(--learn-muted,#586a80);flex-wrap:wrap;justify-content:space-between;align-items:center;gap:20px;padding:22px 0;font-size:14px;display:flex}.learning-pagination a{align-items:center;min-height:44px;text-decoration:none;display:inline-flex}.learning-breadcrumb{color:var(--learn-muted);overflow-wrap:anywhere;flex-wrap:wrap;align-items:center;gap:8px 11px;padding:30px 0;font-size:13px;line-height:1.7;display:flex}.learning-breadcrumb a{color:inherit;text-decoration:none}.learning-breadcrumb a:hover{color:#174cff}.learning-series-intro{padding:10px 0 28px}.learning-series-intro>p{max-width:920px;color:var(--learn-muted);margin:0 0 24px;font-size:18px;line-height:1.9}.learning-series-notes{border-left:2px solid #174cff;flex-wrap:wrap;gap:24px 48px;margin-bottom:40px;padding:2px 0 2px 20px;display:flex}.learning-series-notes>div{flex:300px}.learning-series-notes h2{margin:0 0 8px;font-size:15px}.learning-series-notes ul{color:var(--learn-muted);margin:0;padding:0;font-size:15px;line-height:1.8;list-style:none}.learning-series-directory{border-top:1px solid var(--learn-line);padding:26px 0 20px}.learning-series-directory>ol{margin:0;padding:0;list-style:none}.learning-directory-group{color:var(--learn-muted);margin:20px 0 3px;font-size:14px;font-weight:500}.learning-series-directory li>a{border-bottom:1px solid var(--learn-line);color:var(--learn-ink);grid-template-columns:38px minmax(0,1fr) auto;align-items:center;gap:16px;padding:22px 4px;text-decoration:none;display:grid}.learning-series-directory li>a:hover{background:#f7f9ff}.learning-order{color:var(--learn-muted);align-self:start;padding-top:4px;font-size:13px}.learning-series-directory li>a h3{margin:0 0 6px;font-size:19px;font-weight:650;line-height:1.6}.learning-series-directory li>a p{color:var(--learn-muted);margin:0;font-size:15px;line-height:1.8}.learning-reading-time{color:var(--learn-muted);white-space:nowrap;font-size:13px}.learning-reader-shell{max-width:1440px;margin:0 auto;padding:0 48px 88px}.learning-reader-layout{grid-template-columns:232px minmax(0,960px);align-items:start;gap:32px;display:grid}.learning-reader-sidebar{min-width:0;max-height:calc(100dvh - 116px);padding-right:6px;position:sticky;top:96px;overflow-y:auto}.learning-reader-sidebar summary{cursor:pointer;padding:7px 0 16px;font-size:15px;font-weight:650}.learning-reader-sidebar summary>span{color:var(--learn-muted);font-size:13px;font-weight:400}.learning-reader-sidebar nav{flex-direction:column;gap:4px;display:flex}.learning-reader-sidebar nav a{color:var(--learn-muted);overflow-wrap:anywhere;border-left:2px solid #0000;align-items:baseline;gap:10px;padding:11px 10px;font-size:14px;line-height:1.7;text-decoration:none;display:flex}.learning-reader-sidebar nav a>span{flex-shrink:0;font-size:12px}.learning-reader-sidebar nav a[aria-current]{color:#174cff;background:#f0f3ff;border-left-color:#174cff}.learning-reader-sidebar nav a:hover{color:#174cff}.learning-sidebar-back{align-items:center;min-height:44px;margin-top:15px;font-size:13px;text-decoration:none;display:inline-flex}.learning-sidebar-page{color:var(--learn-muted);font-size:13px;line-height:1.7}.learning-reader-article{min-width:0}.learning-article-intro{border-bottom:1px solid var(--learn-line);padding:4px 0 25px}.learning-article-intro h1{letter-spacing:-.045em;overflow-wrap:anywhere;margin:18px 0;font-size:clamp(29px,3vw,41px);line-height:1.35}.learning-article-intro>p{color:var(--learn-muted);margin:0 0 22px;font-size:18px;line-height:1.8}.learning-article-meta{color:var(--learn-muted);flex-wrap:wrap;gap:7px 17px;font-size:13px;line-height:1.7;display:flex}.learning-article-toc{border:1px solid var(--learn-line);background:#f6f8fc;margin:20px 0 28px;padding:13px 16px}.learning-article-toc summary{cursor:pointer;font-size:14px}.learning-article-toc nav{flex-wrap:wrap;gap:10px 24px;padding:16px 0 6px;font-size:14px;display:flex}.learning-markdown{color:#172c49;overflow-wrap:anywhere;font-size:18px;line-height:1.95}.learning-markdown>:first-child{margin-top:28px}.learning-markdown p{margin:18px 0}.learning-markdown h2,.learning-markdown h3,.learning-markdown h4,.learning-markdown h5,.learning-markdown h6{color:#10213b;scroll-margin-top:100px;line-height:1.5}.learning-markdown h2{letter-spacing:-.025em;margin:38px 0 16px;font-size:26px;font-weight:720}.learning-markdown h3{margin:30px 0 14px;font-size:22px}.learning-markdown ul,.learning-markdown ol{margin:18px 0;padding-left:1.55em}.learning-markdown li{margin:8px 0;padding-left:4px}.learning-markdown a{color:#174cff;text-underline-offset:4px}.learning-markdown blockquote{background:#f3f6fc;border-left:3px solid #3d6baf;margin:26px 0;padding:3px 22px}.learning-markdown pre{white-space:pre;tab-size:2;background:#f3f5f9;border:1px solid #dce3ed;border-radius:3px;max-width:100%;margin:24px 0;padding:18px 20px;font-size:14px;line-height:1.85;overflow-x:auto}.learning-markdown code{background:#f0f3f8;border-radius:2px;padding:2px 5px;font-family:Cascadia Code,Consolas,monospace;font-size:.88em}.learning-markdown pre code{font-size:inherit;background:0 0;padding:0}.learning-markdown img{border:1px solid #dce3ed;max-width:100%;height:auto;margin:24px auto;display:block}.learning-markdown hr{border:0;border-top:1px solid #dce3ed;margin:32px 0}.learning-table-scroll{max-width:100%;margin:24px 0;overflow-x:auto}.learning-markdown table{border-collapse:collapse;width:100%;font-size:16px;line-height:1.75}.learning-markdown th,.learning-markdown td{text-align:left;vertical-align:top;border:1px solid #dce3ed;min-width:100px;padding:11px 14px}.learning-markdown th{background:#f3f6fb;font-weight:650}.learning-source{border-top:1px solid var(--learn-line);color:var(--learn-muted);overflow-wrap:anywhere;margin-top:36px;padding-top:16px;font-size:14px;line-height:1.85}.learning-related-resources{margin:24px 0}.learning-related-resources h2{margin-bottom:10px;font-size:18px}.learning-related-resources ul{padding:0;font-size:16px;line-height:1.9;list-style:none}.learning-next-previous{border-top:1px solid var(--learn-line);grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;margin-top:30px;padding-top:20px;display:grid}.learning-next-previous a{flex-direction:column;gap:10px;font-size:16px;line-height:1.7;text-decoration:none;display:flex}.learning-next-previous a>span{color:var(--learn-muted);font-size:13px}.learning-next-previous a:last-child{text-align:right}.learning-content-error{color:#9b2c2c;padding:18px 0;line-height:1.8}@media (width<=1100px){.learning-shell,.learning-reader-shell{padding-left:32px;padding-right:32px}.learning-featured-card{padding:20px}}@media (width<=900px){.learning-reader-layout{display:block}.learning-reader-sidebar{background:#f7f9fd;border:1px solid #dce3ed;max-height:none;margin-bottom:25px;padding:0 14px;position:static}.learning-reader-sidebar summary{min-height:46px;padding:12px 0}.learning-reader-sidebar details[open]{padding-bottom:14px}.learning-featured-grid{grid-template-columns:1fr}.learning-featured-card{border-top:1px solid #dce3ed;border-left:0}.learning-featured-card:first-child{border-top:0}.learning-intro{flex-direction:column;align-items:flex-start;gap:14px}}@media (width<=580px){.learning-shell,.learning-reader-shell{padding-bottom:56px;padding-left:20px;padding-right:20px}.learning-intro{padding:34px 0}.learning-intro h1{font-size:31px}.learning-intro p,.learning-article-intro>p,.learning-series-intro>p{font-size:16px}.learning-featured{padding-bottom:32px}.learning-featured-card>p,.learning-card-bottom,.learning-series-label{font-size:14px}.learning-section-heading h2{font-size:23px}.learning-series-grid{grid-template-columns:1fr}.learning-series-card h3{font-size:23px}.learning-breadcrumb{padding:22px 0;font-size:12px}.learning-series-intro h1{font-size:32px}.learning-series-notes{gap:18px;margin-bottom:26px}.learning-series-directory li>a{grid-template-columns:27px minmax(0,1fr);gap:10px;padding:18px 0}.learning-series-directory li>a h3{font-size:18px}.learning-series-directory li>a p{font-size:16px}.learning-reading-time{grid-column:2}.learning-reader-sidebar nav a{font-size:16px}.learning-article-intro h1{font-size:30px}.learning-article-meta{gap:5px 12px;font-size:12px}.learning-markdown{font-size:17px;line-height:1.9}.learning-markdown h2{margin-top:30px;font-size:23px}.learning-markdown h3{font-size:20px}.learning-markdown pre{padding:14px;font-size:14px}.learning-markdown table{font-size:16px}.learning-next-previous{gap:18px}.learning-source{font-size:14px}}