.site-header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 88%,transparent);backdrop-filter:saturate(140%) blur(8px);border-bottom:1px solid var(--line)}.header-inner[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;justify-content:space-between;height:64px;gap:1rem}.brand[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:.6rem}.brand-mark[data-astro-cid-3ef6ksr2]{height:28px;width:auto}.brand-name[data-astro-cid-3ef6ksr2]{font-weight:800;letter-spacing:-.01em;font-size:1.05rem}.header-right[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:clamp(1rem,3vw,2rem)}.site-nav[data-astro-cid-3ef6ksr2]{display:flex;gap:clamp(.9rem,3vw,2rem);font-size:var(--step--1);font-weight:600;letter-spacing:.02em}.site-nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{color:var(--muted);transition:color .15s ease}.site-nav[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{color:var(--fg)}.lang-switch[data-astro-cid-3ef6ksr2]{display:inline-flex;align-items:center;gap:.35rem;font-size:var(--step--1);font-weight:700;letter-spacing:.04em}.lang-switch[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{color:var(--faint);transition:color .15s ease}.lang-switch[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover,.lang-switch[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2][aria-current=true]{color:var(--fg)}@media(max-width:520px){.brand-name[data-astro-cid-3ef6ksr2]{display:none}.site-nav[data-astro-cid-3ef6ksr2]{gap:.9rem}}@media(max-width:380px){.site-nav[data-astro-cid-3ef6ksr2]{display:none}}.site-footer[data-astro-cid-sz7xmlte]{border-top:1px solid var(--line-strong);padding-top:clamp(2.5rem,6vw,4rem);padding-bottom:2rem;margin-top:4rem}.footer-grid[data-astro-cid-sz7xmlte]{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:2.5rem}.footer-mark[data-astro-cid-sz7xmlte]{height:26px;width:auto;margin-bottom:.9rem}.footer-name[data-astro-cid-sz7xmlte]{font-weight:800;font-size:1.05rem}.footer-owner[data-astro-cid-sz7xmlte],.footer-addr[data-astro-cid-sz7xmlte]{font-size:var(--step--1);line-height:1.6}.footer-heading[data-astro-cid-sz7xmlte]{font-size:var(--step--1);font-weight:700;letter-spacing:.16em;text-transform:uppercase;color:var(--faint);margin-bottom:.9rem}.footer-nav[data-astro-cid-sz7xmlte] ul[data-astro-cid-sz7xmlte]{list-style:none;display:grid;gap:.6rem;font-size:var(--step--1)}.footer-nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{color:var(--muted);transition:color .15s ease}.footer-nav[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--fg)}.footer-base[data-astro-cid-sz7xmlte]{margin-top:clamp(2.5rem,6vw,4rem);padding-top:1.5rem;border-top:1px solid var(--line)}@media(max-width:700px){.footer-grid[data-astro-cid-sz7xmlte]{grid-template-columns:1fr 1fr}.footer-brand[data-astro-cid-sz7xmlte]{grid-column:1 / -1}}:root{--bg: #ffffff;--fg: #0a0a0a;--muted: #6f6f6f;--faint: #9a9a9a;--line: #e7e7e7;--line-strong: #0a0a0a;--surface: #f6f6f6;--max: 1080px;--pad: clamp(1.25rem, 5vw, 2.5rem);--radius: 2px;--font-sans: "Helvetica Neue", "Arial", -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Yu Gothic", "Meiryo", "Noto Sans JP", system-ui, sans-serif;--step--1: clamp(.8rem, .75rem + .2vw, .9rem);--step-0: clamp(.95rem, .9rem + .25vw, 1.05rem);--step-1: clamp(1.15rem, 1rem + .6vw, 1.4rem);--step-2: clamp(1.5rem, 1.2rem + 1.4vw, 2.2rem);--step-3: clamp(2.1rem, 1.6rem + 2.6vw, 3.6rem);--step-4: clamp(2.8rem, 2rem + 4vw, 5.5rem)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}body{background:var(--bg);color:var(--fg);font-family:var(--font-sans);font-size:var(--step-0);line-height:1.75;letter-spacing:.01em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility;display:flex;flex-direction:column;min-height:100vh}main{flex:1 0 auto}h1,h2,h3{line-height:1.2;letter-spacing:-.02em;font-weight:800}h1{font-size:var(--step-3)}h2{font-size:var(--step-2)}h3{font-size:var(--step-1)}p{color:var(--fg)}a{color:inherit;text-decoration:none}img,svg{display:block;max-width:100%}.container{width:100%;max-width:var(--max);margin-inline:auto;padding-inline:var(--pad)}.section{padding-block:clamp(3rem,8vw,6rem)}.section+.section{border-top:1px solid var(--line)}.eyebrow{display:inline-block;font-size:var(--step--1);font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--muted);margin-bottom:1rem}.lede{font-size:var(--step-1);color:var(--muted);max-width:46ch}.muted{color:var(--muted)}.btn{display:inline-flex;align-items:center;gap:.5em;padding:.8em 1.4em;border:1px solid var(--line-strong);background:var(--fg);color:var(--bg);font-weight:700;font-size:var(--step--1);letter-spacing:.04em;border-radius:var(--radius);transition:opacity .15s ease,transform .15s ease}.btn:hover{opacity:.82}.btn--ghost{background:transparent;color:var(--fg)}.btn--ghost:hover{background:var(--fg);color:var(--bg);opacity:1}.link-underline{border-bottom:1px solid currentColor;padding-bottom:1px;transition:opacity .15s ease}.link-underline:hover{opacity:.6}.prose{max-width:72ch}.prose h2{font-size:var(--step-1);margin-top:2.5rem;margin-bottom:.75rem}.prose h2:first-of-type{margin-top:0}.prose p,.prose li{color:var(--fg);margin-bottom:1rem}.prose ul,.prose ol{padding-left:1.25rem;margin-bottom:1rem}.deftable{width:100%;border-collapse:collapse;border-top:1px solid var(--line-strong)}.deftable th,.deftable td{text-align:left;vertical-align:top;padding:1rem .5rem;border-bottom:1px solid var(--line)}.deftable th{width:34%;font-weight:700;color:var(--muted);font-size:var(--step--1)}@media(max-width:560px){.deftable,.deftable tbody,.deftable tr,.deftable th,.deftable td{display:block;width:100%}.deftable th{border-bottom:none;padding-bottom:0}.deftable td{padding-top:.25rem}}.skip-link{position:absolute;left:-9999px;top:0;background:var(--fg);color:var(--bg);padding:.6rem 1rem;z-index:100}.skip-link:focus{left:0}