:root{--color-bg:#fff;--color-ink:#111;--color-muted:#595959;--color-rule:#111;--color-hairline:#d4d4d4;--color-wash:#f2f2f0;--font-latin:"Helvetica Neue", Helvetica, Arial;--font-cjk:"PingFang SC", "Hiragino Sans GB", "Noto Sans CJK SC", "Noto Sans SC", "Microsoft YaHei";--font-sans:var(--font-latin), var(--font-cjk), sans-serif;--font-zh:var(--font-cjk), var(--font-latin), sans-serif;--font-serif-cjk:"Songti SC", "STSong", "Noto Serif CJK SC", "Noto Serif SC", "Source Han Serif SC", SimSun, serif;--font-serif:"Iowan Old Style", "Palatino Linotype", Palatino, Georgia, var(--font-serif-cjk);--font-mono:ui-monospace, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;--step--1:.8125rem;--step-0:1rem;--step-1:1.125rem;--step-2:1.375rem;--step-3:clamp(1.625rem, 1.2rem + 1.6vw, 2.25rem);--step-4:clamp(2rem, 1.1rem + 3.4vw, 3.75rem);--space-1:.25rem;--space-2:.5rem;--space-3:1rem;--space-4:1.5rem;--space-5:2.5rem;--space-6:clamp(3rem, 2rem + 4vw, 6rem);--space-7:clamp(4.5rem, 3rem + 6vw, 9rem);--columns:4;--gutter:1rem;--margin:1.25rem;--page-max:112rem;--rule:1px solid var(--color-rule);--hairline:1px solid var(--color-hairline);--duration:.16s;--ease:cubic-bezier(.2, 0, 0, 1)}@media (width>=48rem){:root{--columns:8;--gutter:1.25rem;--margin:2rem}}@media (width>=64rem){:root{--columns:12;--gutter:1.5rem;--margin:clamp(2.5rem, 4vw, 4rem)}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{min-height:100vh;font-family:var(--font-sans);font-size:var(--step-0);color:var(--color-ink);background:var(--color-bg);font-kerning:normal;text-rendering:optimizelegibility;-webkit-font-smoothing:antialiased;flex-direction:column;margin:0;line-height:1.7;display:flex}[lang|=zh]{font-family:var(--font-zh);line-break:strict}[lang|=en]{font-family:var(--font-sans)}main{flex:1}h1,h2,h3,p,figure,dl,dd{margin:0}h1,h2,h3{text-wrap:balance;font-weight:600;line-height:1.2}img,picture{max-width:100%;height:auto;display:block}a{color:inherit;text-underline-offset:.2em;text-decoration-thickness:1px}:focus-visible{outline:2px solid var(--color-ink);outline-offset:3px}::selection{background:var(--color-ink);color:var(--color-bg)}.frame{width:100%;max-width:var(--page-max);padding-inline:var(--margin);margin-inline:auto}.grid{grid-template-columns:repeat(var(--columns), minmax(0, 1fr));column-gap:var(--gutter);display:grid}.index-no{font-family:var(--font-mono);font-variant-numeric:tabular-nums;letter-spacing:0}.stamp{font-family:var(--font-mono);font-variant-numeric:tabular-nums;color:var(--color-bg);background:var(--color-ink);box-shadow:inset 0 0 0 1px var(--color-ink);padding:.2em .45em .15em;font-weight:500;line-height:1.2;display:inline-block}.label{font-family:var(--font-latin), sans-serif;font-size:var(--step--1);letter-spacing:.08em;text-transform:uppercase;font-weight:500;line-height:1.4}.muted{color:var(--color-muted)}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;position:absolute;overflow:hidden}.skip-link{z-index:10;left:var(--margin);top:var(--space-2);padding:var(--space-2) var(--space-3);background:var(--color-ink);color:var(--color-bg);text-decoration:none;position:absolute;transform:translateY(-200%)}.skip-link:focus{outline-color:var(--color-ink);transform:none}.page-head{padding-block:var(--space-5) var(--space-4);align-items:end}.page-head h1{margin-bottom:var(--space-2);font-family:var(--font-latin), sans-serif;font-size:var(--step-3);letter-spacing:.02em;grid-column:1/-1;font-weight:600;line-height:1}.page-head__sub{font-size:var(--step--1);color:var(--color-muted);grid-column:1/-1}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition:none!important;animation:none!important}}.site-header[data-astro-cid-fzpbxy5g]{border-top:.375rem solid var(--color-ink);border-bottom:var(--rule)}.site-header__inner[data-astro-cid-fzpbxy5g]{align-items:center;column-gap:var(--gutter);grid-template-columns:1fr auto;grid-template-areas:"mast lang""nav nav";display:grid}.masthead[data-astro-cid-fzpbxy5g]{padding-block:var(--space-3);grid-area:mast;align-items:baseline;gap:.75rem;text-decoration:none;display:flex}.masthead__mark[data-astro-cid-fzpbxy5g]{font-size:var(--step-2);letter-spacing:.12em;font-weight:600;line-height:1}.masthead__latin[data-astro-cid-fzpbxy5g]{font-family:var(--font-latin), sans-serif;font-size:var(--step--1);letter-spacing:.08em;text-transform:uppercase;font-weight:500}.primary-nav[data-astro-cid-fzpbxy5g]{border-top:var(--hairline);grid-area:nav}.primary-nav[data-astro-cid-fzpbxy5g] ul[data-astro-cid-fzpbxy5g]{grid-template-columns:repeat(4,auto);justify-content:space-between;margin:0;padding:0;list-style:none;display:grid}.primary-nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g],.lang-switch[data-astro-cid-fzpbxy5g]{font-family:var(--font-latin), sans-serif;font-size:var(--step--1);letter-spacing:.1em;border-bottom:2px solid #0000;margin-inline:-.375rem;padding-block:.875rem .75rem;padding-inline:.375rem;font-weight:500;line-height:1;text-decoration:none;display:block}.primary-nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g]:hover,.lang-switch[data-astro-cid-fzpbxy5g]:hover{border-bottom-color:var(--color-hairline)}.primary-nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g][aria-current=page]{border-bottom-color:var(--color-ink);font-weight:700}.lang-switch[data-astro-cid-fzpbxy5g]{letter-spacing:.04em;grid-area:lang}.lang-switch[data-astro-cid-fzpbxy5g]:lang(zh){font-family:var(--font-zh)}@media (width>=48rem){.site-header__inner[data-astro-cid-fzpbxy5g]{grid-template-columns:repeat(var(--columns), minmax(0, 1fr));grid-template-areas:none;min-height:4.5rem}.masthead[data-astro-cid-fzpbxy5g]{grid-area:auto/1/auto/span 3}.primary-nav[data-astro-cid-fzpbxy5g]{border-top:0;grid-area:auto/5/auto/span 3;align-self:stretch;display:flex}.primary-nav[data-astro-cid-fzpbxy5g] ul[data-astro-cid-fzpbxy5g]{flex:1;align-items:stretch}.primary-nav[data-astro-cid-fzpbxy5g] a[data-astro-cid-fzpbxy5g],.lang-switch[data-astro-cid-fzpbxy5g]{border-top:2px solid #0000;align-items:center;height:100%;padding-block:0;display:flex}.lang-switch[data-astro-cid-fzpbxy5g]{grid-area:auto/-2/auto/-1;place-self:stretch end}}@media (width>=64rem){.masthead[data-astro-cid-fzpbxy5g]{grid-column:1/span 4}.primary-nav[data-astro-cid-fzpbxy5g]{grid-column:7/span 4}}.site-footer[data-astro-cid-z4jru4n3]{margin-top:var(--space-7);border-top:var(--rule);font-size:var(--step--1);line-height:1.6}.site-footer__inner[data-astro-cid-z4jru4n3]{justify-content:space-between;gap:var(--space-2) var(--space-4);padding-block:var(--space-4) var(--space-5);flex-wrap:wrap;display:flex}.site-footer__name[data-astro-cid-z4jru4n3]{gap:.75em;font-weight:600;display:flex}
