:root{color-scheme:light dark;--bg:#e9eee2;--paper:#f8f9f2;--ink:#263d30;--muted:#536454;--accent:#3d5e49;--line:#cbd5c5;--soft:#dee6d6;--white:#f8faf3;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;font-synthesis:none}
*{box-sizing:border-box}html{scroll-padding-top:24px}body{margin:0;background:var(--bg);color:var(--ink);line-height:1.8;-webkit-text-size-adjust:100%}a{color:var(--accent);text-underline-offset:4px;overflow-wrap:anywhere}a:hover{text-decoration-thickness:2px}a:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:3px}.skip{position:absolute;top:-100px;left:20px;background:var(--paper);padding:12px;z-index:5}.skip:focus{top:10px}.site-header,main,footer{max-width:1120px;margin:auto;padding-left:40px;padding-right:40px}.site-header{padding-top:32px}.header-top{display:flex;justify-content:space-between;align-items:center;gap:24px}.brand{display:inline-flex;align-items:center;gap:12px;font-size:20px;font-weight:650;letter-spacing:-.4px;text-decoration:none;color:var(--ink)}.language{display:flex;gap:4px;padding:4px;border:1px solid var(--line);border-radius:30px}.language a{display:flex;align-items:center;justify-content:center;min-width:66px;min-height:36px;padding:2px 12px;font-size:13px;text-decoration:none;border-radius:24px}.language a[aria-current=true]{background:var(--paper);color:var(--ink);box-shadow:0 1px 4px #182a1510}.main-nav{display:flex;flex-wrap:wrap;gap:8px 24px;border-bottom:1px solid var(--line);padding:23px 0 18px}.main-nav a{display:inline-flex;align-items:center;min-height:44px;font-size:14px;text-decoration:none;color:var(--muted)}.main-nav a[aria-current=page]{color:var(--ink);font-weight:650;text-decoration:underline}.hero{padding-top:64px;padding-bottom:44px;max-width:840px}.eyebrow{text-transform:uppercase;letter-spacing:2px;font-size:12px;font-weight:650;color:var(--accent);margin:0 0 18px}h1{font-family:Georgia,"Songti SC","Noto Serif CJK SC",serif;font-weight:500;font-size:clamp(38px,6vw,68px);line-height:1.22;letter-spacing:-1.8px;margin:0 0 24px;overflow-wrap:anywhere}.intro{font-size:18px;line-height:1.9;color:var(--muted);max-width:740px;margin:0 0 24px}.date{font-size:12px;letter-spacing:.3px;color:var(--muted);margin:24px 0 0}.button{display:inline-flex;align-items:center;gap:24px;background:var(--accent);color:var(--white);padding:10px 24px;min-height:48px;border-radius:28px;text-decoration:none;font-size:14px;font-weight:550}.reading-layout{display:grid;grid-template-columns:210px minmax(0,1fr);gap:40px;align-items:start;padding-bottom:64px}aside{position:sticky;top:24px;border-top:1px solid var(--line);padding-top:20px}.toc-heading{font-size:12px;letter-spacing:1px;color:var(--muted);margin:0 0 14px}aside ol{list-style:none;padding:0;margin:0}aside li{margin-bottom:6px}aside a{font-size:13px;line-height:1.6;display:block;padding:7px 0;color:var(--muted);text-decoration:none}article{min-width:0;background:var(--paper);border:1px solid var(--line);border-radius:24px;padding:12px 36px}article section{padding:25px 0;border-bottom:1px solid var(--line);scroll-margin-top:24px}article section:last-child{border-bottom:0}h2{font-size:19px;line-height:1.5;font-weight:600;letter-spacing:-.3px;margin:0 0 14px}article p{font-size:15px;line-height:1.95;margin:0;color:var(--muted);overflow-wrap:anywhere}footer{border-top:1px solid var(--line);padding-top:28px;padding-bottom:32px;color:var(--muted);font-size:13px}footer p{margin:0 0 8px}footer nav{display:flex;flex-wrap:wrap;gap:6px 20px;margin:14px 0}footer nav a{min-height:44px;display:inline-flex;align-items:center}footer .small{font-size:11px;margin-top:18px}
@media(prefers-color-scheme:dark){:root{--bg:#202720;--paper:#29322a;--ink:#ebf0e5;--muted:#bac7b8;--accent:#bfdbb9;--line:#465345;--soft:#334232;--white:#203320}.button{background:var(--accent);color:var(--white)}}
@media(max-width:760px){.site-header,main,footer{padding-left:22px;padding-right:22px}.site-header{padding-top:22px}.brand{font-size:17px;gap:9px}.brand img{width:30px;height:30px}.header-top{gap:12px;flex-wrap:wrap}.language a{min-width:56px;padding:2px 9px;min-height:40px}.main-nav{gap:2px 20px;padding:15px 0 12px}.main-nav a{font-size:13px}.hero{padding-top:40px;padding-bottom:30px}h1{letter-spacing:-1px}.intro{font-size:16px}.reading-layout{display:block;padding-bottom:36px}aside{position:static;margin-bottom:24px;padding-top:14px}aside ol{display:flex;flex-wrap:wrap;gap:0 18px}aside li{margin:0}aside a{padding:9px 0}article{padding:4px 22px;border-radius:20px}article section{padding:24px 0}article p{font-size:15px}h2{font-size:18px}}
@media print{body{background:white;color:black}.site-header,aside,footer,.button,.date{display:none}.site-header,main{max-width:none;padding:0}.hero{padding:0 0 20px}.reading-layout{display:block}article{border:0;padding:0}article section{break-inside:avoid}article p,.intro{color:black}a{color:inherit}h1{font-size:32px}h2{font-size:18px}}