:root{color-scheme:light;--bg:#fbfaf7;--ink:#24211d;--accent:#6f3f2d;--line:#e2ded6;--muted:#706b63;--soft:#f3f0ea}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:2rem}body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.85 'Noto Sans CJK TC','PingFang TC','Microsoft JhengHei',sans-serif}a{color:var(--accent);text-underline-offset:.22em}a:hover{color:#a05437}a:focus-visible,button:focus-visible,summary:focus-visible,pre:focus-visible{outline:3px solid var(--accent);outline-offset:4px}header{max-width:70rem;margin:auto;padding:28px 24px 0;border-bottom:1px solid var(--line)}.brand{display:flex;justify-content:space-between;align-items:center;gap:15px}.brand>a{font-weight:750;text-decoration:none;font-size:21px;letter-spacing:.03em;color:var(--ink)}.brand span{font-weight:400;color:var(--muted)}.edition{font-size:13px}header nav{display:flex;flex-wrap:wrap;gap:8px 26px;margin-top:24px}header nav a{padding:8px 0 13px;font-size:14px;text-decoration:none;color:var(--muted);border-bottom:2px solid transparent}header nav a[aria-current]{color:var(--accent);border-color:var(--accent);font-weight:bold}.layout{display:grid;grid-template-columns:13.5rem minmax(0,46rem);gap:3rem;max-width:70rem;margin:0 auto;padding:48px 24px 80px}aside{font-size:13px;min-width:0}aside details{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;padding-right:10px}summary{cursor:pointer;font-weight:700;margin-bottom:14px}aside nav{display:flex;flex-direction:column;gap:9px}aside a{color:var(--muted);text-decoration:none;line-height:1.6}aside .level-h3{padding-left:12px;font-size:12px}main{min-width:0}h1{font-size:clamp(28px,3.2vw,39px);line-height:1.4;letter-spacing:-.02em;margin:8px 0 24px;font-weight:750}h2{font-size:25px;line-height:1.5;margin:50px 0 18px;padding-top:12px;border-top:1px solid var(--line)}h3{font-size:20px;line-height:1.55;margin:35px 0 15px}p{margin:16px 0}li{margin:10px 0}ol,ul{padding-left:1.5em}.eyebrow{font-size:12px;color:var(--accent);letter-spacing:.12em;margin-bottom:20px}code{font-family:'Cascadia Code','DejaVu Sans Mono',monospace;font-size:.84em;overflow-wrap:anywhere;background:#eeeae3;padding:2px 5px;border-radius:3px}pre{position:relative;background:#f0eee8;border:1px solid #ddd7cc;border-radius:6px;padding:40px 20px 20px;overflow:auto;line-height:1.75;max-width:100%;font-size:14px}pre code{padding:0;background:none;white-space:pre;overflow-wrap:normal;font-size:inherit}pre button{position:absolute;top:6px;right:8px;font:12px inherit;color:var(--accent);background:var(--bg);border:1px solid #cfc8bc;padding:4px 10px;border-radius:4px;cursor:pointer}.table-scroll{overflow:auto}table{border-collapse:collapse;width:100%;font-size:14px}td,th{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;min-width:110px}th{background:var(--soft)}blockquote{margin:24px 0;border-left:3px solid #8b641f;background:#f6ecd4;padding:4px 20px;font-size:15px}.cards{display:grid;gap:14px;margin:32px 0}.cards>a{display:block;border:1px solid var(--line);border-radius:7px;padding:22px 24px;text-decoration:none;color:var(--ink);background:white;transition:border-color .15s}.cards>a:hover{border-color:var(--accent)}.cards span{font-size:11px;letter-spacing:.12em;color:var(--accent)}.cards h2{font-size:23px;border:0;margin:5px 0;padding:0}.cards p{font-size:15px;color:var(--muted);margin:4px 0 8px}.cards strong{font-size:12px;font-weight:500;color:var(--accent)}.pager{border-top:1px solid var(--line);margin-top:60px;padding-top:24px;display:flex;justify-content:space-between;gap:24px;font-size:14px}footer{max-width:70rem;margin:auto;border-top:1px solid var(--line);padding:28px 24px 45px;font-size:12px;color:var(--muted)}footer a{margin-left:20px}.skip{position:fixed;top:-80px;left:10px;background:white;padding:10px;z-index:99}.skip:focus{top:10px}@media(max-width:760px){body{font-size:16px}.layout{display:block;padding:24px 20px 50px}header{padding:18px 20px 0}.brand>a{font-size:18px}.edition{font-size:11px}header nav{gap:0 18px;margin-top:16px}header nav a{font-size:13px;padding:8px 0}aside{margin-bottom:30px;background:var(--soft);padding:14px;border-radius:5px}aside details{position:static;max-height:240px}main h1{font-size:29px}.pager{flex-wrap:wrap}pre{padding-left:14px;padding-right:14px;font-size:12px}h2{font-size:22px}h3{font-size:19px}.cards>a{padding:18px}.table-scroll{margin:0 -4px}footer a{display:block;margin:10px 0}li{margin:14px 0}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}@media print{header,aside,.pager,footer,pre button{display:none}.layout{display:block;max-width:none;padding:0}body{background:white;color:black;font-size:11pt}pre{white-space:pre-wrap;overflow:visible}pre code{white-space:pre-wrap}h2,h3{break-after:avoid}a{color:inherit}}
.home{max-width:70rem;margin:auto;padding:0 24px 72px}.home-hero{padding:76px 0 72px;max-width:50rem}.home h1{font-size:clamp(32px,4.1vw,48px);line-height:1.45;letter-spacing:-.035em}.lead{color:var(--muted);font-size:18px;margin:24px 0 30px}.cta{display:inline-block;background:var(--accent);color:white;text-decoration:none;padding:10px 20px;border-radius:4px;font-size:14px}.cta:hover{background:#583123;color:white}.home section{margin-bottom:58px}.section-label{color:var(--accent);font-size:11px;letter-spacing:.12em}.home section>h2{border:0;margin:6px 0 24px;padding:0}.course-feature{display:grid;grid-template-columns:1.4fr 1fr;gap:32px;padding:32px;background:white;border:1px solid var(--line);border-radius:8px;text-decoration:none;color:var(--ink)}.course-feature:hover{border-color:var(--accent);color:var(--ink)}.tag{font-size:12px;color:var(--accent)}.course-feature h3{font-size:29px;margin:10px 0}.course-feature p{color:var(--muted);font-size:16px}.course-meta{font-size:12px;color:var(--muted);display:block}.course-feature strong{font-size:14px;color:var(--accent);display:block;margin-top:24px}.course-art{background:var(--soft);border-radius:4px;display:flex;flex-direction:column;padding:25px 35px;justify-content:center;color:var(--accent);font:14px/2.2 monospace}.shapes{font-size:55px;letter-spacing:.12em;margin-top:12px;color:#8b641f}.topic-grid,.learning-steps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.topic-grid>*,.learning-steps li{padding:22px;border-top:1px solid var(--line);text-decoration:none;color:var(--ink)}.topic-grid p,.learning-steps p{font-size:14px;color:var(--muted);margin:8px 0}.topic-grid span{font-size:12px;color:var(--accent)}.learning-steps{list-style-position:inside;padding:0}.learning-steps li{margin:0}@media(max-width:760px){.home{padding:0 20px 40px}.home-hero{padding:45px 0}.home h1{font-size:33px}.lead{font-size:16px}.course-feature{grid-template-columns:1fr;padding:22px;gap:20px}.course-feature h3{font-size:25px}.course-art{padding:16px 24px;flex-direction:row;align-items:center;gap:12px;flex-wrap:wrap;font-size:11px}.shapes{font-size:34px;margin:0}.topic-grid,.learning-steps{grid-template-columns:1fr;gap:0}.home section{margin-bottom:38px}}
.home h1{text-wrap:balance}@media(max-width:420px){.home h1{font-size:30px}}