:root{font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans TC",sans-serif;color:#233b3b;background:#fafbf8;font-synthesis:none;--green:#236650;--muted:#6b7772;--line:#dde4dc;--pale:#edf3ea}*{box-sizing:border-box}body{margin:0}a{color:var(--green);text-underline-offset:4px}button,input{font:inherit}button,a,input{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,main:focus-visible{outline:3px solid #ba7f27;outline-offset:4px}button{border:1px solid var(--line);background:white;border-radius:6px;padding:9px 13px;color:inherit}a{text-decoration:none}p{line-height:1.9}h1,h2,h3{text-wrap:balance}h1{font-size:clamp(32px,4vw,52px);line-height:1.3;font-weight:650}h2{font-size:25px}h3{font-size:19px}.topbar{height:78px;position:sticky;top:0;z-index:20;background:#fafbf8;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 36px;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-size:23px;font-weight:750;color:#233b3b}.brand-icon{background:var(--green);color:white;display:grid;place-items:center;width:34px;height:38px;border-radius:8px;font-size:32px}.brand-note{font-size:13px;color:var(--muted);font-weight:400;border-left:1px solid var(--line);padding-left:14px;margin-left:6px}.topbar nav{display:flex;align-items:center;gap:25px;font-size:14px}.topbar nav a{color:#53625b}#menu{display:none}.layout{display:grid;grid-template-columns:282px minmax(0,1fr);max-width:1700px;margin:auto}#sidebar{height:calc(100dvh - 78px);position:sticky;top:78px;overflow:auto;border-right:1px solid var(--line);padding:30px 22px 50px;background:#f6f8f3}.eyebrow{font-size:11px;font-weight:700;color:var(--green)}.side-head h2{font-size:14px;margin:12px 0 25px}.search-label{font-size:12px;color:var(--muted)}.search-box{display:flex;gap:8px;align-items:center;border:1px solid #d7dfd4;background:white;border-radius:6px;padding:0 10px;margin-top:8px}.search-box span{font-size:23px}.search-box input{min-width:0;width:100%;border:0;background:transparent;padding:12px 0;font-size:12px}.progress-head{display:flex;justify-content:space-between;font-size:12px;margin:24px 0 10px}progress{width:100%;height:5px;accent-color:var(--green);display:block}progress::-webkit-progress-bar{background:#e1e8de;border-radius:4px}progress::-webkit-progress-value{background:var(--green);border-radius:4px}.local-note{font-size:10px;color:var(--muted);margin-bottom:23px}.group-title{font-size:11px;color:#66776b;font-weight:650;margin:23px 8px 10px}.chapter-link{display:flex;align-items:baseline;gap:10px;padding:9px 10px;border-radius:5px;font-size:12px;color:#52615a;line-height:1.7}.chapter-link:hover{background:#e9eee5}.chapter-link[aria-current=page]{background:#dfebdf;color:#1e593e;font-weight:650}.chapter-link .num{font-size:10px;min-width:18px;color:#7b897f;font-variant-numeric:tabular-nums}.chapter-link.done .num{color:var(--green)}main{min-width:0;padding:47px clamp(24px,4.3vw,74px) 80px}.hero{display:grid;grid-template-columns:1.45fr 1fr;gap:30px;align-items:center;border-bottom:1px solid var(--line);padding:0 0 42px}.tag{display:inline-block;background:var(--pale);padding:7px 11px;border-radius:5px;font-size:11px;font-weight:600;color:var(--green)}.hero h1{margin:22px 0 18px}.hero h1 em{font-style:normal;color:var(--green)}.intro{color:var(--muted);font-size:14px;max-width:430px}.actions{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-top:26px}.primary{display:inline-block;background:var(--green);color:white;padding:13px 20px;border-radius:6px;font-size:13px;border:0}.secondary{display:inline-block;border:1px solid var(--line);padding:12px 18px;border-radius:6px;font-size:13px}.score-art{background:#edf2e8;padding:30px 22px 22px;border-radius:12px;transform:rotate(-2deg);max-width:330px;margin:auto;width:100%}.score-sheet{background:#fffef9;border:1px solid #dbe1d4;border-radius:4px;padding:20px 16px;box-shadow:0 8px 18px #233b3b09}.score-caption{font-size:10px;color:#74816e;display:flex;justify-content:space-between}.score-sheet svg{width:100%;height:auto;margin:15px 0}.note-labels{display:flex;justify-content:space-around;font-family:Georgia,serif;color:var(--green);font-size:14px}.art-footer{display:flex;justify-content:space-between;align-items:center;font-size:11px;margin:20px 0 0;color:var(--green)}.stats{display:flex;gap:35px;margin-top:27px;font-size:11px;color:var(--muted)}.stats strong{font-size:20px;color:#233b3b;margin-right:5px;font-weight:600}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-top:35px}.section-head h2{font-size:22px;margin-bottom:6px}.section-head p{font-size:12px;color:var(--muted);margin-top:7px}.route-list{margin-top:18px;border-top:1px solid var(--line)}.stage{display:grid;grid-template-columns:44px 1fr auto;gap:18px;align-items:center;padding:22px 0;border-bottom:1px solid var(--line);color:inherit}.stage:hover h3{color:var(--green)}.stage-letter{height:39px;width:39px;display:grid;place-items:center;border:1px solid #d4dfce;background:#f1f5ed;border-radius:8px;font-size:16px;color:var(--green);font-family:Georgia,serif}.stage h3{font-size:15px;margin:0 0 5px}.stage p{font-size:12px;color:var(--muted);margin:0}.stage-range{font-size:11px;color:var(--muted);white-space:nowrap}.stage-range span{font-size:17px;margin-left:18px}.bottom-note{padding:20px 0;font-size:12px;color:var(--muted)}.breadcrumb{font-size:12px;color:var(--muted);margin-bottom:26px}.lesson-head{border-bottom:1px solid var(--line);padding-bottom:24px;margin-bottom:30px}.lesson-head h1{font-size:clamp(28px,3.2vw,40px);margin:15px 0}.lesson-tools{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;align-items:center}.reader-grid{display:grid;grid-template-columns:minmax(0,760px) 175px;gap:34px;align-items:start}.article{font-size:15px;line-height:1.9;min-width:0;overflow-wrap:anywhere}.article>h1:first-child{display:none}.article h2{margin:45px 0 16px;padding-bottom:12px;border-bottom:1px solid var(--line);font-size:24px}.article h3{margin-top:30px}.article h1,.article h2,.article h3,.article h4{scroll-margin-top:100px}.article a{text-decoration:underline}.article li{margin:6px 0}.article img{max-width:100%;height:auto}.article pre{position:relative;background:#20352f;color:#e7f0e4;border-radius:7px;padding:44px 20px 20px;overflow:auto;line-height:1.75;font-size:13px;tab-size:4}.article code{font-family:"SFMono-Regular",Consolas,monospace}.article :not(pre)>code{background:#edf0e7;padding:2px 5px;border-radius:3px;font-size:.88em}.copy{position:absolute;right:10px;top:8px;background:#314b40;color:#e7f0e4;border-color:#496052;font-size:11px;padding:4px 9px}.table-wrap{overflow:auto;max-width:100%}table{border-collapse:collapse;width:100%;font-size:13px}th,td{border:1px solid var(--line);padding:10px 13px;text-align:left;min-width:95px}th{background:var(--pale)}blockquote,.admonition,.callout{margin:22px 0;padding:12px 20px;border-left:3px solid #78936b;background:#f0f4ea}blockquote p{margin:5px 0}.toc{position:sticky;top:110px;border-left:1px solid var(--line);padding-left:18px;max-height:70dvh;overflow:auto}.toc h2{font-size:12px;margin-top:0}.toc a{display:block;font-size:11px;line-height:1.8;color:var(--muted);margin:10px 0}.lesson-nav{display:flex;justify-content:space-between;gap:15px;margin-top:45px;padding-top:25px;border-top:1px solid var(--line)}.lesson-nav a{font-size:13px;max-width:48%;line-height:1.8}.lesson-nav small{display:block;color:var(--muted)}.resource-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin:25px 0}.resource{padding:24px;border:1px solid var(--line);border-radius:8px}.resource h2{font-size:18px}.resource p{font-size:13px;color:var(--muted)}.search-result{display:block;border-bottom:1px solid var(--line);padding:22px 0}.search-result h2{font-size:18px}.search-result p{font-size:13px;color:var(--muted)}.loading{padding:70px 0;color:var(--muted)}.sr-only,.skip:not(:focus){position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.skip:focus{position:fixed;z-index:30;background:white;padding:20px}hr{border:0;border-top:1px solid var(--line);margin:35px 0}@media(min-width:1450px){main{padding-left:80px;padding-right:80px}}@media(max-width:1150px){.reader-grid{grid-template-columns:minmax(0,1fr)}.toc{display:none}.hero{grid-template-columns:1.4fr 1fr}.score-art{padding:20px 12px}}@media(max-width:850px){.layout{grid-template-columns:235px minmax(0,1fr)}#sidebar{padding:24px 14px}.hero{grid-template-columns:1fr}.score-art{display:none}.brand-note{display:none}.topbar{padding:0 23px}main{padding:32px 25px}.resource-grid{grid-template-columns:1fr}}@media(max-width:640px){.topbar{height:66px;padding:0 16px}.brand{font-size:19px;gap:8px}.brand-icon{width:28px;height:32px}.topbar nav{gap:12px;font-size:12px}.topbar nav>a:first-child{display:none}#menu{display:block;font-size:12px;padding:8px}.layout{display:block}#sidebar{display:none;position:fixed;z-index:10;top:66px;left:0;right:0;height:calc(100dvh - 66px);padding:25px}#sidebar.open{display:block}main{padding:30px 21px 60px}.hero h1{font-size:36px}.hero{padding-bottom:28px}.stats{gap:23px}.stage{gap:12px;grid-template-columns:35px 1fr}.stage-letter{width:33px;height:35px}.stage-range{grid-column:2}.stage-range span{float:right}.section-head{align-items:start}.article{font-size:15px}.article pre{font-size:12px}.lesson-head h1{font-size:29px}}@media print{.topbar,#sidebar,.toc,.lesson-tools,.lesson-nav,.copy{display:none!important}.layout,.reader-grid{display:block}main{padding:0}.article pre{white-space:pre-wrap;color:#111;background:#eee}.article h2{break-after:avoid}body{background:white}}