:root{--paper:#f7f8f5;--white:#fff;--ink:#152c36;--muted:#4d626b;--line:#d8e1df;--a:#11666a;--b:#98512c;--c:#414c9a;--accent:#11666a;font-family:"Segoe UI","Microsoft JhengHei",system-ui,sans-serif;color:var(--ink);background:var(--paper);font-synthesis:none;font-size:18px}
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.site-header{max-width:1344px;margin:auto;padding:24px 48px;display:flex;align-items:center;gap:28px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:9px;font-size:16px;font-weight:750;text-decoration:none;white-space:nowrap}.brand-mark{display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:7px;background:var(--ink);color:white;letter-spacing:-3px;padding-right:3px;font-family:monospace;font-weight:700}.brand-mark span{color:#87c2b1}.brand-owner{color:var(--muted);font-weight:400;font-size:14px}.site-header nav{display:flex;justify-content:center;gap:22px;flex:1}.site-header nav a{font-size:15px;text-decoration:none;font-weight:600}.site-header nav a:hover{text-decoration:underline}.language-switch{display:flex;gap:3px;border:1px solid var(--line);padding:3px;border-radius:8px}.language-switch a{font-size:14px;padding:6px 9px;text-decoration:none;white-space:nowrap}.language-switch [aria-current]{color:white;background:var(--ink);border-radius:5px}
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.lesson-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:30px}.lesson-number{display:block;font-family:monospace;font-size:14px;color:var(--a);margin-bottom:18px}.lesson-grid h3{font-size:19px;line-height:1.4;min-height:72px}.lesson-grid p{font-size:17px;color:var(--muted);margin-top:10px}.code-section{display:grid;grid-template-columns:1.65fr 1fr;gap:70px;align-items:center;background:#eaf0eb;margin:0 48px 48px;padding:36px 34px;border:1px solid #d2ddd5;border-radius:9px}.code-section h2{font-size:28px;max-width:620px}.code-section p:not(.eyebrow){font-size:17px;margin-top:15px;color:var(--muted)}.code-section .source-status{font-size:15px!important}.code-actions{display:flex;flex-direction:column;gap:10px}.site-footer{padding:0 48px 35px;display:flex;justify-content:space-between;gap:48px;font-size:14px;color:var(--muted)}.site-footer>div:first-child{max-width:830px}.footer-brand{font-size:16px;font-weight:700;text-decoration:none;color:var(--ink);display:inline-block;margin-bottom:12px}.site-footer p{margin-bottom:7px}.footer-links{display:flex;gap:13px;flex-wrap:wrap;align-content:start;justify-content:flex-end;min-width:180px}
:lang(zh) h1{font-size:clamp(34px,4.2vw,54px);line-height:1.25;letter-spacing:-.035em}:lang(zh) .hero-intro{line-height:1.9}:lang(zh) h2{line-height:1.4}:lang(zh) .round-question{min-height:63px}:lang(zh) .finding dd{line-height:1.9}
@media(min-width:1200px){.hero{min-height:660px}}
@media(max-width:1050px){.site-header{padding:20px 30px;gap:18px}.brand-owner{display:none}.site-header nav{gap:15px}.hero{padding:54px 30px 60px;gap:30px;grid-template-columns:1.15fr 1fr}.section{padding:50px 30px}.workflow-grid,.finding-grid{gap:14px}.workflow{padding:22px 18px}.workflow h3{font-size:18px}.round-question{min-height:85px}.training-tag{min-height:42px}.finding-heading{min-height:76px}.lesson-grid{gap:22px;grid-template-columns:repeat(2,minmax(0,1fr))}.lesson-grid h3{min-height:0}.code-section{margin:0 30px 35px;gap:32px;grid-template-columns:1.3fr 1fr}.site-footer{padding:0 30px 30px}}
@media(max-width:960px){.hero{grid-template-columns:1fr;gap:36px}.hero-copy{max-width:760px}.hero-figure{max-width:680px}.workflow-grid,.finding-grid{grid-template-columns:1fr;gap:28px}.round-question,.challenge,.finding-heading{min-height:0}.finding figure img{height:auto;max-height:360px}}
@media(max-width:760px){.site-header{padding:15px 20px;flex-wrap:wrap;justify-content:space-between;gap:16px}.site-header nav{order:3;flex-basis:100%;justify-content:space-between;gap:12px}.site-header nav a{font-size:14px}.hero{grid-template-columns:1fr;padding:42px 20px 48px;gap:35px}.hero h1{font-size:42px}.subtitle{font-size:19px}.hero-intro{font-size:18px}.hero-figure{max-width:580px}.section{padding:42px 20px}.workflow-grid,.finding-grid{grid-template-columns:1fr;gap:24px}.workflow{padding:24px}.round-question{min-height:0;margin-bottom:0}.training-tag{min-height:0}.steps li{min-height:55px}.challenge{min-height:0}.finding-heading{min-height:0}.finding figure img{height:auto;max-height:290px;object-fit:contain}.finding figcaption{min-height:0}.finding dl{margin-top:20px}.finding:not(:last-child){padding-bottom:22px;border-bottom:1px solid var(--line)}.lesson-grid{gap:28px 20px}.lesson-grid h3{font-size:18px}.code-section{grid-template-columns:1fr;padding:28px 24px;margin:0 20px 35px;gap:25px}.code-section h2{font-size:25px}.site-footer{padding:0 20px 30px;flex-direction:column;gap:15px}.footer-links{justify-content:flex-start}:lang(zh) .hero h1{font-size:38px}:lang(zh) .round-question{min-height:0}}
@media(max-width:370px){.hero h1{font-size:36px}:lang(zh) .hero h1{font-size:34px}.actions{flex-direction:column}.lesson-grid{grid-template-columns:1fr}.site-header nav a{font-size:13px}.brand{font-size:14px}.language-switch a{padding:6px 7px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
.print-only{display:none}
@media print{
  @page{size:A4;margin:12mm}
  html{background:white;scroll-behavior:auto}
  body{background:white;-webkit-print-color-adjust:exact;print-color-adjust:exact;font-size:11.5pt}
  .site-header,.skip-link,.actions,.download-note,a[href$=".pdf"],.footer-brand,.footer-links a[href$="NOTICE.md"]{display:none!important}
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  .hero{padding:12px 0 24px;grid-template-columns:1.15fr 1fr;gap:24px;min-height:0;break-after:page}
  .hero-copy{max-width:none}
  h1,:lang(zh) h1,:lang(zh) .hero h1{font-size:30pt;line-height:1.3}
  .subtitle{font-size:15pt;margin:16px 0}
  .hero-intro{font-size:11.5pt;line-height:1.85}
  .byline{font-size:10.5pt;margin-top:16px}
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  .steps li{font-size:11pt;line-height:1.6;min-height:58px;padding-bottom:18px}
  .challenge,.round-learning{font-size:10.5pt;line-height:1.75;min-height:0}
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  .finding{padding-bottom:0!important;border-bottom:0!important;break-inside:avoid}
  .finding figure img{height:110px;max-height:none;width:100%;object-fit:contain}
  .finding figcaption{font-size:9pt;line-height:1.5;padding:8px;min-height:60px}
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  .comparison-note{font-size:10.5pt;padding:10px 14px;margin-top:18px;break-inside:avoid}
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  .lesson-grid p{font-size:11.5pt}
  .lesson-number{font-size:10pt;margin-bottom:10px}
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  .code-section h2{font-size:18pt}
  .code-section p:not(.eyebrow){font-size:11pt}
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  .code-actions .button span{display:none}
  .code-actions a[href^="https://"]::after{content:" (" attr(href) ")"}
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  .footer-links{justify-content:flex-start;margin-top:10px}
  p{orphans:3;widows:3}
}