:root{--bg:oklch(100% 0 0);--surface:oklch(97.5% .005 175);--surface-2:oklch(95.5% .007 175);--line:oklch(90.5% .008 200);--muted:oklch(46% .02 220);--ink:oklch(25% .02 230);--cream:#f6f5ea;--primary:oklch(47% .11 172);--primary-strong:oklch(40% .1 174);--primary-soft:oklch(90% .06 176);--primary-tint:oklch(96% .03 174);--accent:oklch(70% .15 50);--accent-ink:oklch(48% .13 48);--accent-tint:oklch(95% .035 60);--success:oklch(55% .12 150);--success-ink:oklch(48% .12 150);--success-tint:oklch(95% .04 150);--warning:oklch(72% .14 80);--warning-ink:oklch(50% .1 70);--warning-tint:oklch(95% .05 85);--danger:oklch(55% .18 25);--danger-ink:oklch(50% .18 25);--danger-tint:oklch(95% .04 25);--info:oklch(55% .12 255);--info-ink:oklch(48% .13 255);--info-tint:oklch(95% .03 255);--fs-display:clamp(2.4rem, 1.8rem + 3vw, 3.75rem);--fs-h1:clamp(1.95rem, 1.6rem + 1.75vw, 2.6rem);--fs-h2:clamp(1.55rem, 1.35rem + 1vw, 1.9rem);--fs-h3:1.4rem;--fs-body:1.25rem;--fs-sm:.95rem;--fs-xs:.8125rem;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-5:1.5rem;--space-6:2rem;--space-8:3rem;--space-10:4rem;--space-section:clamp(3rem, 2rem + 3vw, 5rem);--font-sans:var(--font-atkinson), "PingFang SC", "HarmonyOS Sans SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;--font-mono:ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;--radius:12px;--radius-sm:8px;--radius-full:999px;--shadow-sm:0 1px 2px oklch(26% .03 215/.06), 0 2px 8px oklch(26% .03 215/.07);--shadow:0 6px 20px oklch(26% .03 215/.09), 0 16px 40px oklch(26% .03 215/.08);--content:720px}body{font-family:var(--font-sans);text-align:left;background:var(--bg);color:var(--ink);font-size:var(--fs-body);-webkit-font-smoothing:antialiased;word-wrap:break-word;overflow-wrap:break-word;margin:0;padding:0;line-height:1.75;overflow-x:hidden}main{width:var(--content);max-width:calc(100% - 2em);margin:auto;padding:3em 1em}h1,h2,h3,h4,h5,h6{color:var(--ink);text-wrap:balance;margin:0 0 .5rem;font-weight:700;line-height:1.25}h1{font-size:var(--fs-h1);letter-spacing:-.02em}h2{font-size:var(--fs-h2);letter-spacing:-.015em}h3{font-size:var(--fs-h3)}h4{font-size:1.2rem}h5{font-size:1.05rem}strong,b{font-weight:700}a{color:var(--primary);text-underline-offset:2px}a:hover{color:var(--primary-strong)}p{margin-bottom:1em}.prose p{margin-bottom:1.5em}.prose h2{font-size:var(--fs-h2);letter-spacing:-.01em;margin:3rem 0 .6rem;scroll-margin-top:6rem}.prose h3{font-size:var(--fs-h3);margin:2rem 0 .5rem;scroll-margin-top:6rem}.prose{text-wrap:pretty}textarea{width:100%;font-size:16px}input{font-size:16px}table{width:100%}img{border-radius:var(--radius-sm);max-width:100%;height:auto}code{background-color:var(--surface-2);font-family:var(--font-mono);border-radius:4px;padding:.15em .4em;font-size:.9em}pre{border-radius:var(--radius);padding:1.2em}pre>code{all:unset}.callout{margin:var(--space-5) 0;padding:var(--space-4) var(--space-5);border-left:4px solid var(--c,var(--primary));border-radius:var(--radius-sm);background:var(--c-bg,var(--primary-tint));color:var(--ink);line-height:1.7}.callout>:last-child{margin-bottom:0}.callout>b:first-child,.callout>strong:first-child{color:var(--c-ink,var(--primary-strong));margin-right:.4em;font-weight:800}.callout>b:first-child:before,.callout>strong:first-child:before{content:"";vertical-align:-.18em;width:1.05em;height:1.05em;-webkit-mask:var(--icon) center / contain no-repeat;mask:var(--icon) center / contain no-repeat;background:currentColor;margin-right:.32em;display:inline-block}.callout.tip{--c:var(--info);--c-bg:var(--info-tint);--c-ink:var(--info-ink);--icon:url(/brand/callout/tip.svg)}.callout.warn{--c:var(--warning);--c-bg:var(--warning-tint);--c-ink:var(--warning-ink);--icon:url(/brand/callout/warn.svg)}.callout.danger{--c:var(--danger);--c-bg:var(--danger-tint);--c-ink:var(--danger-ink);--icon:url(/brand/callout/danger.svg)}.callout.do{--c:var(--success);--c-bg:var(--success-tint);--c-ink:var(--success-ink);--icon:url(/brand/callout/do.svg)}mark{background:var(--accent-tint);color:var(--accent-ink);border-radius:var(--radius-sm);font-weight:inherit;padding:.05em .32em}blockquote{background:var(--primary-tint);border-radius:var(--radius-sm);color:var(--ink);margin:0 0 1.2em;padding:.9em 1.2em;font-size:1.05em}hr{border:none;border-top:1px solid var(--line);margin:2em 0}.prose a{text-decoration:underline 1px;text-decoration-color:color-mix(in oklab, var(--primary) 45%, transparent)}.prose a:hover{text-decoration-color:var(--primary)}:focus-visible{outline:2px solid var(--primary);outline-offset:2px}[tabindex="-1"]:focus{outline:none}.btn{box-sizing:border-box;border-radius:var(--radius-full);border:1px solid var(--primary);background:var(--primary);color:#fff;min-height:44px;font:inherit;cursor:pointer;justify-content:center;align-items:center;gap:.4em;padding:.55em 1.4em;font-size:.98rem;font-weight:600;line-height:1.2;text-decoration:none;transition:background .16s,border-color .16s,transform .16s;display:inline-flex}.btn:hover{background:var(--primary-strong);border-color:var(--primary-strong);color:#fff;transform:translateY(-2px)}.btn:active{transform:translateY(0)}.btn.ghost{background:var(--bg);color:var(--primary-strong);border-color:var(--line)}.btn.ghost:hover{background:var(--primary-tint);border-color:var(--primary);color:var(--primary-strong)}.btn:disabled,.btn[aria-disabled=true]{background:var(--surface-2);border-color:var(--line);color:var(--muted);cursor:not-allowed;transform:none}.chip{font-size:var(--fs-xs);color:var(--primary-strong);background:var(--primary-tint);border-radius:var(--radius-full);align-self:flex-start;padding:.28em .75em;font-weight:700;line-height:1.4;display:inline-block}@media (width<=720px){body{font-size:18px}main{padding:1.5em 1em}}.sr-only{clip:rect(1px 1px 1px 1px);clip:rect(1px, 1px, 1px, 1px);clip-path:inset(50%);white-space:nowrap;border:0;width:1px;height:1px;margin:0;padding:0;overflow:hidden;position:absolute!important}@media (prefers-reduced-motion:reduce){*,:before,:after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}.social[data-astro-cid-y2qsmizv]{align-items:center;gap:.6rem;display:flex}.social[data-astro-cid-y2qsmizv] a[data-astro-cid-y2qsmizv]{border-radius:var(--radius);background:var(--brand);width:2.3rem;height:2.3rem;box-shadow:var(--shadow-sm);place-items:center;transition:transform .16s,box-shadow .16s;display:grid}.social[data-astro-cid-y2qsmizv] a[data-astro-cid-y2qsmizv]:hover{box-shadow:0 6px 16px color-mix(in oklab, var(--brand) 45%, transparent);transform:translateY(-2px)}.ico[data-astro-cid-y2qsmizv]{width:1.3rem;height:1.3rem;-webkit-mask:var(--icon) center / contain no-repeat;mask:var(--icon) center / contain no-repeat;background:#fff}footer[data-astro-cid-jo6i4kqk]{background:var(--surface);border-top:1px solid var(--line);margin-top:4rem}.foot-inner[data-astro-cid-jo6i4kqk]{max-width:1080px;margin:0 auto;padding:2.5rem 1.2rem 3rem}.foot-top[data-astro-cid-jo6i4kqk]{flex-wrap:wrap;justify-content:space-between;align-items:center;gap:.8rem;margin-bottom:1.1rem;display:flex}.foot-brand[data-astro-cid-jo6i4kqk]{align-items:center;gap:.5em;display:flex}.name[data-astro-cid-jo6i4kqk]{color:var(--ink);font-size:1.1rem;font-weight:800}.tag[data-astro-cid-jo6i4kqk]{font-size:var(--fs-xs);color:var(--muted);border-left:1px solid var(--line);padding-left:.7em}.foot-links[data-astro-cid-jo6i4kqk]{border-top:1px solid var(--line);flex-wrap:wrap;gap:.5rem 1.1rem;margin-bottom:.9rem;padding:1.1rem 0;display:flex}.foot-links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]{font-size:var(--fs-sm);color:var(--muted);text-decoration:none}.foot-links[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]:hover{color:var(--primary)}.copy[data-astro-cid-jo6i4kqk]{font-size:var(--fs-xs);color:var(--muted);margin:0}@media (width<=640px){.tag[data-astro-cid-jo6i4kqk]{display:none}}.skip-link[data-astro-cid-nen7h5rs]{z-index:100;background:var(--primary);color:#fff;border-radius:var(--radius-sm);padding:.5em 1em;font-weight:600;text-decoration:none;transition:transform .16s;position:absolute;top:.6rem;left:.6rem;transform:translateY(-160%)}.skip-link[data-astro-cid-nen7h5rs]:focus{transform:translateY(0)}#nav-top-sentinel[data-astro-cid-nen7h5rs]{height:1px}header[data-astro-cid-nen7h5rs]{z-index:50;background:var(--bg);border-bottom:1px solid var(--line);transition:box-shadow .2s;position:sticky;top:0}header[data-astro-cid-nen7h5rs][data-stuck]{box-shadow:var(--shadow-sm)}nav[data-astro-cid-nen7h5rs]{justify-content:space-between;align-items:center;max-width:1080px;margin:0 auto;padding:.7em 1.2em;display:flex}.brand[data-astro-cid-nen7h5rs]{align-items:center;gap:.5em;text-decoration:none;display:flex}.logo[data-astro-cid-nen7h5rs]{flex:none}.wordmark[data-astro-cid-nen7h5rs]{letter-spacing:-.01em;color:var(--ink);font-size:1.3rem;font-weight:800}.links[data-astro-cid-nen7h5rs]{gap:.3em;display:flex}.navlink[data-astro-cid-nen7h5rs]{border-radius:var(--radius-sm);color:var(--ink);font-size:var(--fs-sm);padding:.5em .85em;font-weight:500;text-decoration:none;transition:background .15s,color .15s}.navlink[data-astro-cid-nen7h5rs]:hover{background:var(--primary-tint);color:var(--primary-strong)}.navlink[data-astro-cid-nen7h5rs].active{color:var(--primary);font-weight:700}@media (width<=640px){nav[data-astro-cid-nen7h5rs]{padding:.6em 1em}}