@charset "UTF-8";
:root{--mag-paper:#ffffff;--mag-ink:#233b40;--mag-muted:#65787c;--mag-green:#23616a;--mag-line:#dde6e5;--mag-light:#f0f6f5;--mag-rust:#23616a;--mag-serif:'Songti SC','STSong','Noto Serif CJK SC',serif;--mag-sans:'PingFang SC','Hiragino Sans GB','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body.magazine{margin:0;background:var(--mag-paper);color:var(--mag-ink);font:16px/1.8 var(--mag-sans);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}a:hover{color:var(--mag-rust)}a:focus-visible{outline:3px solid var(--mag-rust);outline-offset:5px}::selection{background:#dcebea}.skip{position:absolute;top:-100px;left:20px;padding:12px 20px;background:var(--mag-green);color:white;z-index:20}.skip:focus{top:10px}.mag-masthead{max-width:1200px;margin:auto;padding:20px 32px 0}.mag-topline{display:flex;justify-content:space-between;font:12px/1.7 var(--mag-sans);color:var(--mag-muted);letter-spacing:.1em}.mag-wordmark{display:block;text-align:center;color:var(--mag-green);font:600 clamp(38px,5vw,66px)/1.35 var(--mag-serif);letter-spacing:.12em;padding:14px 0 20px}.mag-wordmark small{display:block;font:11px/2 Georgia,serif;letter-spacing:.3em;padding-top:8px}.mag-masthead nav{display:flex;justify-content:center;gap:48px;border-top:1px solid var(--mag-line);border-bottom:1px solid var(--mag-ink);padding:15px 0;font:15px/1.7 var(--mag-sans)}.mag-masthead nav a[aria-current]{color:var(--mag-green);text-decoration:underline;text-underline-offset:7px;text-decoration-thickness:2px}.mag-container{max-width:1136px;margin:auto}.magazine h1,.magazine h2,.magazine h3{font-family:var(--mag-serif);font-weight:600;color:var(--mag-ink);margin-top:0}.magazine h1{font-size:48px;line-height:1.5;letter-spacing:.015em}.magazine h2{font-size:29px;line-height:1.6}.magazine h3{font-size:26px;line-height:1.6}.mag-kicker{color:var(--mag-rust);font:13px/1.8 var(--mag-sans);letter-spacing:.1em;margin:0 0 16px}.mag-home-lead{display:grid;grid-template-columns:1fr 1.15fr;gap:54px;align-items:center;padding:44px 0 48px}.mag-home-lead h1{font-size:44px;margin-bottom:20px}.mag-home-lead>div>p:not(.mag-kicker){font-size:17px;line-height:1.95;color:var(--mag-muted);margin-bottom:25px}.mag-home-lead figure{margin:0;min-width:0}.editorial-art{width:100%;height:auto;display:block;aspect-ratio:3/2;object-fit:cover}.mag-home-lead figcaption{font-size:12px;color:var(--mag-muted);margin-top:9px}.mag-inline-links{display:flex;gap:26px;flex-wrap:wrap;font-size:14px;color:var(--mag-green)}.mag-inline-links a{border-bottom:1px solid var(--mag-green);padding-bottom:3px}.mag-section{padding:24px 0 42px}.mag-section-heading{display:flex;justify-content:space-between;align-items:baseline;gap:20px;border-top:2px solid var(--mag-green);padding-top:18px;margin-bottom:23px}.mag-section-heading h2{margin:0;font-size:28px}.mag-section-heading>a{font-size:14px;color:var(--mag-green);white-space:nowrap}.mag-section-intro{font-size:15px;color:var(--mag-muted);margin:-10px 0 24px}.mag-stories{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:36px}.mag-story{padding:0 0 25px;border-bottom:1px solid var(--mag-line);min-width:0}.mag-meta{display:flex;gap:16px;justify-content:space-between;font-size:13px;color:var(--mag-muted);margin-bottom:13px}.mag-meta>a{color:var(--mag-rust)}.mag-story h3{margin:0 0 12px;font-size:25px}.mag-story>p{font-size:15px;line-height:1.9;color:var(--mag-muted);margin:0 0 17px}.mag-story time{font-size:12px;color:var(--mag-muted)}.mag-resource-band{background:var(--mag-light);padding:30px 36px;margin:20px 0 65px;display:flex;justify-content:space-between;align-items:center;gap:30px}.mag-resource-band h2{font-size:27px;margin:0 0 10px}.mag-resource-band p{font-size:15px;color:var(--mag-muted);margin:0}.mag-resource-band .mag-kicker{font-size:12px;color:var(--mag-rust);margin-bottom:10px}.mag-resource-band>a{font-size:15px;white-space:nowrap;color:var(--mag-green);border-bottom:1px solid}.mag-footer{max-width:1136px;margin:50px auto 0;padding:30px 0 35px;border-top:1px solid var(--mag-line);display:flex;align-items:center;justify-content:space-between;gap:25px;color:var(--mag-ink);font:14px/1.8 var(--mag-sans)}.mag-footer-brand{font:600 27px var(--mag-serif);color:var(--mag-green)}.mag-footer p{font-size:13px;color:var(--mag-muted);margin:10px 0 0}.mag-footer nav{display:flex;gap:24px;font-size:13px}.mag-footer>small{font-size:12px;color:var(--mag-muted)}.mag-topics{max-width:1136px;margin:0 auto;display:flex;justify-content:center;gap:30px;padding:18px 0;border-bottom:1px solid var(--mag-line);font-size:14px;flex-wrap:wrap}.mag-topics a[aria-current]{color:var(--mag-green);font-weight:600;text-decoration:underline;text-underline-offset:5px}.mag-library-intro{display:flex;align-items:center;justify-content:space-between;gap:30px;padding:42px 0 22px}.mag-library-intro h1{font-size:43px;margin:0}.mag-library-intro .mag-kicker{margin-bottom:5px;font:12px Georgia,serif;letter-spacing:.16em}.mag-library-intro>p{color:var(--mag-muted);font-size:16px;line-height:1.9;margin:0}.mag-topic-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0}.mag-topic{position:relative;display:block;padding:8px 20px 27px;border-right:1px solid var(--mag-line)}.mag-topic:first-child{padding-left:0}.mag-topic:last-child{border-right:0;padding-right:0}.mag-topic>span{display:flex;justify-content:space-between;gap:6px;color:var(--mag-green);font-size:13px}.mag-topic small{font-size:12px;color:var(--mag-muted);white-space:nowrap}.mag-topic h3{font-size:21px;line-height:1.7;margin:17px 0 10px}.mag-topic p{font-size:14px;color:var(--mag-muted);line-height:1.85;margin:0 0 20px}.mag-topic b{position:absolute;bottom:0;font-weight:400;color:var(--mag-green)}.mag-dossier{background:var(--mag-light);padding:30px 36px;display:grid;grid-template-columns:1fr 1fr;gap:55px;margin:15px 0 65px}.mag-dossier h2{font-size:27px;margin:0 0 13px}.mag-dossier p{font-size:15px;color:var(--mag-muted)}.mag-dossier .mag-kicker{font-size:12px;color:var(--mag-rust)}.mag-dossier a{color:var(--mag-green)}.mag-dossier>div>a{font-size:14px}.mag-dossier ul{list-style:none;margin:0;padding:0;align-self:center}.mag-dossier li{border-bottom:1px solid var(--mag-line);padding:13px 0;font-family:var(--mag-serif);font-size:20px}.mag-collection-intro{padding:35px 0}.mag-back{display:inline-block;color:var(--mag-muted);font-size:14px;margin-bottom:27px}.mag-collection-intro h1{font-size:42px;margin:0 0 15px}.mag-collection-intro>p:not(.mag-kicker){font-size:17px;color:var(--mag-muted);max-width:750px}.mag-empty{background:var(--mag-light);padding:35px;max-width:750px;margin-bottom:65px}.mag-empty h2{font-size:26px}.mag-empty p{color:var(--mag-muted)}.mag-empty a{color:var(--mag-green);font-size:15px}.mag-breadcrumb{display:flex;gap:12px;padding:26px 0 35px;font-size:13px;color:var(--mag-muted)}.mag-article-heading{max-width:790px;margin:0 auto 40px}.mag-article-heading h1{font-size:44px;line-height:1.5;margin:0 0 23px}.mag-deck{font-size:19px;line-height:1.9;color:var(--mag-muted);margin:0 0 26px}.mag-byline{font-size:13px;color:var(--mag-muted);border-top:1px solid var(--mag-line);padding-top:18px}.mag-article-layout{display:grid;grid-template-columns:195px minmax(0,710px);gap:50px}.mag-toc{position:sticky;top:25px;align-self:start;font-size:14px}.mag-toc>p{color:var(--mag-green);margin:0 0 17px}.mag-toc ul{list-style:none;padding:0;margin:0}.mag-toc li{margin:0 0 15px;line-height:1.7}.mag-toc a{display:block;border-left:1px solid var(--mag-line);padding-left:14px;color:var(--mag-muted)}.mag-prose{font-size:18px;line-height:2.05;overflow-wrap:anywhere}.mag-prose p{margin:0 0 25px}.mag-prose h2{font-size:28px;line-height:1.6;margin:42px 0 20px}.mag-prose a{color:var(--mag-green);text-decoration:underline;text-underline-offset:5px}.mag-prose ul,.mag-prose ol{padding-left:24px}.mag-prose li{margin-bottom:12px}.mag-related{max-width:790px;margin:65px auto 0}.mag-related .mag-stories{grid-template-columns:repeat(2,minmax(0,1fr))}.mag-pagination{display:flex;gap:12px;margin:35px 0}.mag-pagination a{border:1px solid var(--mag-line);padding:7px 16px}.mag-pagination [aria-current]{background:var(--mag-green);color:white}
@media(max-width:1200px){.mag-container,.mag-footer,.mag-topics{margin-left:32px;margin-right:32px}.mag-home-lead{gap:30px}.mag-home-lead h1{font-size:39px}.mag-topic{padding-inline:14px}.mag-topic h3{font-size:20px}}
@media(max-width:800px){.mag-topline{font-size:11px}.mag-masthead{padding:16px 22px 0}.mag-masthead nav{gap:24px;font-size:14px;flex-wrap:wrap;padding:13px 0}.mag-wordmark{font-size:45px;padding:17px 0}.mag-container,.mag-footer,.mag-topics{margin-left:24px;margin-right:24px}.mag-home-lead{grid-template-columns:1fr;padding:30px 0;gap:25px}.mag-home-lead h1{font-size:36px}.mag-home-lead figure{max-width:600px}.mag-stories{grid-template-columns:1fr;gap:25px}.mag-story h3{font-size:25px}.mag-topic-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:22px}.mag-topic,.mag-topic:first-child,.mag-topic:last-child{padding:0 0 24px;border:0;border-bottom:1px solid var(--mag-line)}.mag-topic h3{font-size:23px}.mag-library-intro{display:block;padding:28px 0 15px}.mag-library-intro h1{font-size:36px;margin-bottom:17px}.mag-topics{gap:12px 24px;justify-content:flex-start;padding:15px 0}.mag-section{padding-bottom:28px}.mag-section-heading h2{font-size:26px}.mag-dossier{grid-template-columns:1fr;padding:25px;gap:15px}.mag-resource-band{display:block;padding:25px}.mag-resource-band>a{display:inline-block;margin-top:22px}.mag-footer{flex-wrap:wrap;gap:22px}.mag-footer nav{flex-wrap:wrap;gap:20px}.mag-article-heading h1{font-size:34px}.mag-deck{font-size:17px}.mag-article-layout{display:block}.mag-toc{position:static;padding:18px 0;border-block:1px solid var(--mag-line);margin-bottom:28px}.mag-toc ul{display:flex;gap:12px 22px;flex-wrap:wrap}.mag-toc li{margin:0}.mag-toc a{border:0;padding:0}.mag-prose{font-size:17px}.mag-prose h2{font-size:25px}.mag-related .mag-stories{grid-template-columns:1fr}.mag-collection-intro h1{font-size:34px}.mag-collection-intro{padding:28px 0 15px}}
@media(max-width:420px){.mag-topline>span:last-child{display:none}.mag-masthead nav{gap:16px}.mag-topic-grid{gap:20px}.mag-topic h3{font-size:21px}.mag-topic>span{flex-wrap:wrap}.mag-wordmark{font-size:41px}.mag-section-heading>a{font-size:13px}.mag-article-heading h1{font-size:31px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}@media print{.mag-masthead,.mag-footer,.mag-topics,.mag-toc,.mag-related{display:none}.mag-article-layout{display:block}}

/* Selected direction: A's open blue-green composition + B's magazine masthead. */
.mag-masthead{padding-top:30px}.mag-wordmark{font-size:60px;letter-spacing:9px;color:var(--mag-ink);padding:0 0 24px}.mag-wordmark small{letter-spacing:6px;padding-top:14px}.mag-masthead nav{border-top:0;border-bottom:3px double var(--mag-ink);padding:0 0 20px;gap:44px}.mag-home-lead{grid-template-columns:.85fr 1.15fr;gap:65px;padding:50px 0}.mag-home-lead h1{font-size:48px;line-height:1.4;letter-spacing:-1px}.mag-home-lead>div>p:not(.mag-kicker){font-size:16px}.mag-feature{background:var(--mag-light);min-width:0}.mag-cover{display:block;width:100%;height:auto;aspect-ratio:3/2;object-fit:cover}.mag-feature .mag-cover{aspect-ratio:1.95}.mag-feature>div{padding:22px 26px 25px}.mag-feature h2{font-size:27px;margin:0 0 10px;line-height:1.5}.mag-feature .mag-kicker{font-size:12px;margin-bottom:12px}.mag-feature p{font-size:14px;color:var(--mag-muted);margin:0 0 15px}.mag-feature-read{font-size:12px;color:var(--mag-green)}.mag-cover-link{display:block;margin-bottom:20px;overflow:hidden}.mag-cover-link img{transition:transform .3s}.mag-cover-link:hover img{transform:scale(1.025)}.mag-section-heading{border-top:1px solid var(--mag-line);padding-top:25px}.mag-section-heading h2{font-size:25px}.mag-topic-grid{gap:24px}.mag-topic,.mag-topic:first-child,.mag-topic:last-child{border:0;padding:0 15px 25px 0}.mag-topic h3{font-family:var(--mag-sans);font-size:16px;line-height:1.75;margin:12px 0 15px}.mag-topic p{display:none}.mag-topic>span{font-size:12px;color:var(--mag-muted)}.mag-topic b{right:0;bottom:20px}.mag-topic small{font-size:11px}.mag-article-heading{text-align:center;max-width:850px}.mag-article-heading h1{font-size:45px}.mag-byline{border:0;padding-top:0}.mag-article-cover{display:block;width:100%;height:auto;aspect-ratio:1.9;object-fit:cover;max-width:850px;margin:0 auto 48px}.mag-article-layout{justify-content:center}.mag-prose{font-size:17px;line-height:2}.mag-related{max-width:950px}.mag-story h3{font-size:25px}.mag-meta{font-size:12px}.mag-topics{font-size:13px}.mag-story>p{font-size:14px}.mag-resource-band{background:var(--mag-light)}
@media(max-width:1200px){.mag-home-lead{gap:36px}.mag-home-lead h1{font-size:42px}.mag-topic-grid{gap:18px}}
@media(max-width:800px){.mag-wordmark{font-size:43px;letter-spacing:6px}.mag-masthead nav{gap:20px;font-size:14px}.mag-home-lead{grid-template-columns:1fr;gap:28px;padding:30px 0}.mag-home-lead h1{font-size:37px}.mag-feature h2{font-size:26px}.mag-topic-grid{gap:22px}.mag-topic h3{font-size:16px}.mag-article-heading h1{font-size:32px}.mag-article-cover{margin-bottom:30px}.mag-meta{justify-content:flex-start}.mag-cover-link .mag-cover{aspect-ratio:1.8}.mag-article-heading{text-align:left}.mag-feature>div{padding:20px}.mag-topic>span{flex-wrap:wrap}}
@media(prefers-reduced-motion:reduce){.mag-cover-link img{transition:none}}

.path-demo-note{padding:10px 32px;background:#233b40;color:#fff;font:12px/1.8 'PingFang SC',sans-serif;display:flex;justify-content:space-between}.path-demo-note a{color:#fff}.growth-path{--path-line:#adc6c8;--path-accent:#23616a;--path-muted:#617579;padding:35px 0 28px;border-top:1px solid var(--mag-line);margin-bottom:25px}.path-heading{display:flex;justify-content:space-between;align-items:end;gap:30px;margin-bottom:37px}.path-heading .path-eyebrow{color:var(--path-accent);font-size:12px;letter-spacing:.12em;margin:0 0 10px}.path-heading h2{font-size:31px;margin:0;line-height:1.5}.path-heading>p{font-size:14px;color:var(--path-muted);line-height:1.85;margin:0 0 4px}.path-track{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:0}.path-step{position:relative;min-width:0;padding-right:22px}.path-step:not(:last-child):before{content:'';position:absolute;top:22px;left:45px;right:0;height:1px;background:var(--path-line)}.path-step:not(:last-child):after{content:'';position:absolute;top:19px;right:13px;width:6px;height:6px;border-top:1px solid var(--path-line);border-right:1px solid var(--path-line);transform:rotate(45deg)}.path-step>a,.path-upcoming{display:block;position:relative}.path-node{width:45px;height:45px;border:1px solid var(--path-accent);border-radius:50%;display:grid;place-items:center;font:19px/1 Georgia,serif;letter-spacing:.03em;color:var(--path-accent);background:white;transition:background .2s,color .2s}.path-copy{margin-top:19px;padding:12px 12px 16px 0;transition:background .2s}.path-category{font-size:12px;color:var(--path-muted);margin:0 0 8px}.path-copy h3{font-size:27px;line-height:1.45;margin:0 0 12px;letter-spacing:.03em}.path-question{font-size:14px;line-height:1.9;color:var(--mag-ink);margin:0 0 19px;min-height:54px}.path-link{font-size:12px;color:var(--path-accent);display:flex;gap:18px;align-items:center;min-height:44px}.path-step>a:hover .path-node,.path-step>a:focus-visible .path-node{background:var(--path-accent);color:white}.path-step>a:hover .path-copy{background:#f0f6f5}.path-step>a:focus-visible{outline:2px solid var(--path-accent);outline-offset:6px;border-radius:3px}.coming .path-node{border-color:var(--path-line);border-style:dashed}.coming .path-link{color:var(--path-muted)}.path-return{border-top:1px solid var(--mag-line);padding-top:18px;margin-top:5px;display:flex;align-items:center;gap:12px;color:var(--path-muted)}.path-return>span{font-size:26px;line-height:1;color:var(--path-accent)}.path-return p{font-size:13px;margin:0}.path-return>a{font-size:12px;color:var(--path-accent);margin-left:auto;min-height:44px;display:flex;align-items:center;gap:12px}.path-step a:hover{color:inherit}
@media(max-width:900px){.path-heading{align-items:start}.path-heading h2{font-size:27px}.path-heading>p{font-size:13px}.path-step{padding-right:12px}.path-copy h3{font-size:23px}.path-question{font-size:13px}.path-return{flex-wrap:wrap}.path-return>a{margin-left:0}}
@media(max-width:650px){.growth-path{padding-top:25px}.path-heading{display:block;margin-bottom:25px}.path-heading>p{margin-top:15px}.path-track{display:block}.path-step{padding:0 0 25px}.path-step>a,.path-upcoming{display:grid;grid-template-columns:44px 1fr;gap:22px}.path-node{width:44px;height:44px;margin-top:3px;font-size:18px}.path-step:not(:last-child):before{top:47px;left:21px;bottom:0;right:auto;width:1px;height:auto}.path-step:not(:last-child):after{top:auto;bottom:12px;left:18px;right:auto;transform:rotate(135deg)}.path-copy{margin:0;padding:0 0 12px;display:grid;grid-template-columns:1fr auto;column-gap:10px;border-bottom:1px solid var(--mag-line)}.path-category{grid-column:1/-1}.path-copy h3{font-size:25px;margin-bottom:8px}.path-question{grid-column:1;grid-row:3;min-height:0;font-size:14px;margin:0}.path-question br{display:none}.path-link{grid-column:2;grid-row:2/4;align-self:center;gap:8px;font-size:12px}.path-return{margin-top:0;padding-top:15px;gap:10px}.path-return p{flex:1}.path-return>a{flex-basis:100%;padding-left:34px}.path-demo-note{padding-inline:20px}}
@media(prefers-reduced-motion:reduce){.path-node,.path-copy{transition:none}}

/* Practice articles share the reading typography while retaining tutorial components. */
.article-main{max-width:1136px}.article-header{max-width:850px;margin:0 auto 40px;text-align:center}.article-header h1{font-family:var(--mag-serif);font-size:45px;line-height:1.5;color:var(--mag-ink)}.article-deck{font-size:19px;line-height:1.9;color:var(--mag-muted)}.article-meta{justify-content:center}.article-layout{display:grid;grid-template-columns:195px minmax(0,710px);gap:50px;justify-content:center}.article-layout .prose{font-size:17px;line-height:2}.article-layout .prose h2{font:600 28px/1.6 var(--mag-serif);margin:42px 0 20px}.article-main .breadcrumb{font-size:13px}.article-main .toc{font-size:14px}.mag-container>.mag-topics{margin:0;justify-content:flex-start}.related{max-width:950px;margin:65px auto 0}
@media(max-width:1200px){.article-main{margin-inline:32px}}@media(max-width:800px){.article-main{margin-inline:24px}.article-header{text-align:left}.article-header h1{font-size:32px}.article-layout{display:block}.article-meta{justify-content:flex-start}.article-deck{font-size:17px}}