.site-header_header__WR2UA{position:sticky;z-index:30;top:0;border-bottom:1px solid var(--surface-line);background:color-mix(in srgb,var(--paper) 92%,transparent);-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px)}.site-header_inner__2jM7W{display:grid;grid-template-columns:1fr auto 1fr;align-items:center;max-width:var(--site-width);min-height:4rem;margin:0 auto;padding:0 var(--page-gutter)}.site-header_brand__29rTX{color:var(--ink);font-family:var(--font-serif);font-size:1.4rem;font-weight:700;letter-spacing:.08em;text-decoration:none;white-space:nowrap}.site-header_inner__2jM7W nav{justify-self:end}.site-header_search__abO_u{display:grid;width:2.5rem;height:2.5rem;place-items:center;border-radius:50%;color:var(--ink)}.site-header_search__abO_u:hover{background:var(--surface);color:var(--accent)}.site-header_search__abO_u svg{width:1.4rem;fill:none;stroke:currentColor;stroke-linecap:round;stroke-width:1.7}.site-header_visuallyHidden__UN_Ya{position:absolute;width:1px;height:1px;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}:root{--paper:#f0f3f1;--surface:#ffffff;--surface-line:#e1e6e3;--ink:#17211d;--muted:#65716c;--line:#d2d9d5;--accent:#176044;--accent-soft:#e1eee7;--site-width:68.75rem;--reading-width:45rem;--page-gutter:clamp(1rem,4vw,2rem);--font-serif:"Source Han Serif SC","Noto Serif CJK SC","Songti SC",serif;--font-sans:system-ui,-apple-system,"Segoe UI","Noto Sans CJK SC","Microsoft YaHei",sans-serif;--font-utility:"SFMono-Regular",Consolas,"Liberation Mono",monospace}*{box-sizing:border-box}html{color-scheme:light;scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:18px;line-height:1.8}a{color:var(--accent);text-decoration-thickness:.08em;text-underline-offset:.18em}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid var(--accent);outline-offset:3px}h1,h2,h3{font-family:var(--font-serif);line-height:1.35;text-wrap:balance}img{display:block;max-width:100%;height:auto}.skip-link{position:fixed;z-index:100;top:.5rem;left:.5rem;transform:translateY(-200%);padding:.5rem .75rem;background:var(--ink);color:var(--paper)}.skip-link:focus{transform:translateY(0)}.site-main{max-width:var(--site-width);min-height:60vh;margin:0 auto;padding:clamp(1rem,3vw,1.75rem) var(--page-gutter) 8rem}@media (max-width:42rem){body{font-size:17px}}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:after,:before{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}