:root{--ink: #1B1E22;--ink-soft: #33393e;--muted: #5a6166;--paper: #FFFDF6;--bg: #FFFDF6;--mizu: #AEE3EB;--mizu-light: #E4F7FA;--umi: #1F7280;--bg-elev: #E4F7FA;--bg-2: #E4F7FA;--line: rgba(27, 30, 34, .18);--line-soft: rgba(27, 30, 34, .12);--rule: #1B1E22;--coral: #FF5A36;--coral-ink: #D6390B;--moss: #5C7A2E;--moss-ink: #46601F;--sun: #FFD23F;--momo: #FFC6D9;--accent: var(--moss);--accent-ink: var(--moss-ink);--accent-tint: #F1F5EA;--brand: var(--moss);--brand-ink: var(--accent-ink);--sage: var(--umi);--sage-tint: var(--mizu-light);--save: var(--umi);--save-soft: var(--mizu-light);--gold: var(--sun);--warn: var(--sun);--font-sans: "Zen Kaku Gothic New", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;--font-display: var(--font-sans);--font-rozha: "Rozha One", serif;--font-logo: "eurostile-extended", var(--font-mono);--font-michroma: "Michroma", var(--font-mono);--font-city: "DM Sans", "Helvetica Neue", Helvetica, sans-serif;--font-wide: "Archivo", "Arial Black", sans-serif;--font-caslon: "Libre Caslon Text", serif;--font-mono: "IBM Plex Mono", ui-monospace, monospace;--bw: 1px;--bw-sm: 1px;--edge: rgba(27, 30, 34, .18);--r-sm: 4px;--r-md: 6px;--r-lg: 8px;--r-pill: 6px;--shadow-ink: 0 10px 24px rgba(27, 30, 34, .1);--shadow-ink-sm: 0 3px 10px rgba(27, 30, 34, .08);--shadow-mizu: 0 10px 24px rgba(27, 30, 34, .1);--shadow-sun: 0 14px 28px rgba(27, 30, 34, .16);--shadow-sm: var(--shadow-ink-sm);--shadow-md: var(--shadow-ink);--container: 1280px;--gutter: clamp(1.75rem, 5vw, 3rem)}*{box-sizing:border-box}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:84px}body{margin:0;min-height:100dvh;display:flex;flex-direction:column;font-family:var(--font-sans);color:var(--ink);background:var(--bg);line-height:1.9;font-weight:400;font-feature-settings:"palt";letter-spacing:.015em;-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}main{flex:1 0 auto}::selection{background:var(--sun)}:focus-visible{outline:3px solid var(--moss);outline-offset:3px;border-radius:4px}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}h1,h2,h3,h4{font-family:var(--font-display);line-height:1.4;letter-spacing:.03em;font-weight:900}.container{width:min(100% - var(--gutter) * 2,var(--container));margin-inline:auto}.en{font-family:var(--font-rozha);font-weight:400}.en-sub{font-family:var(--font-michroma);font-style:normal;font-weight:400;color:var(--accent-ink);letter-spacing:.02em}.marker{background:linear-gradient(transparent 58%,var(--sun) 58% 92%,transparent 92%);padding:0 .08em}.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.78rem 1.7rem;border-radius:var(--r-pill);border:var(--bw) solid var(--edge);font-family:var(--font-sans);font-weight:900;font-size:.9rem;letter-spacing:.08em;cursor:pointer;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.btn-primary{background:var(--moss);color:#fff;box-shadow:var(--shadow-ink)}.btn-primary:hover{transform:translateY(-2px);box-shadow:0 14px 28px #1b1e2229}.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-ink-sm)}.btn-ghost{background:var(--paper);color:var(--ink);border-width:var(--bw-sm);padding:.6rem 1.4rem;font-size:.82rem;letter-spacing:.12em;box-shadow:var(--shadow-ink-sm)}.btn-ghost:hover{transform:translateY(-1px);box-shadow:var(--shadow-ink);background:var(--sun)}.pill{display:inline-flex;align-items:center;gap:.35rem;padding:.22rem .8rem;border-radius:var(--r-pill);border:var(--bw-sm) solid var(--edge);font-size:.7rem;font-weight:900;letter-spacing:.12em;background:var(--mizu);color:var(--ink)}.pill--sun{background:var(--sun)}.pill--momo,.pill--save{background:var(--momo)}.pill--mizu{background:var(--mizu)}.pill--brand{background:var(--sun)}.eyebrow{font-family:var(--font-mono);font-size:.72rem;font-weight:600;letter-spacing:.22em;color:var(--umi);text-transform:uppercase}.section-title{font-size:clamp(1.5rem,1rem + 1.8vw,2.15rem);margin:.35rem 0 0;letter-spacing:.03em;font-weight:900}.no-chip{display:inline-flex;align-items:center;justify-content:center;flex:none;width:2rem;height:2rem;border-radius:50%;background:var(--ink);color:var(--mizu-light);font-family:var(--font-mono);font-size:.76rem;font-weight:600}.lede{color:var(--ink-soft);font-size:1rem;font-weight:500}.cluster{display:flex;flex-wrap:wrap;gap:.6rem;align-items:center}.grid{display:grid;gap:1.2rem}@keyframes rise{0%{opacity:0;transform:translateY(14px)}to{opacity:1;transform:translateY(0)}}.rise{animation:rise .7s cubic-bezier(.2,.7,.2,1) both}@keyframes spin{to{transform:rotate(360deg)}}@media(prefers-reduced-motion:reduce){*,*:before,*:after{transition:none!important;animation:none!important}}.prose{font-size:.94rem;color:var(--ink-soft);line-height:2}.prose h2{font-size:1.4rem;color:var(--ink);margin:2.8rem 0 1rem;padding-left:.9rem;border-left:4px solid var(--mizu);letter-spacing:.03em}.prose h3{font-size:1.12rem;margin:2rem 0 .7rem;color:var(--ink)}.prose p{margin:1.05rem 0}.prose ul,.prose ol{padding-left:1.3rem}.prose li{margin:.45rem 0}.prose strong{color:var(--ink)}.prose a{color:var(--umi);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:2px;text-decoration-color:var(--mizu)}.prose a:hover{text-decoration-color:var(--umi)}.prose img{width:100%;border-radius:var(--r-sm);margin:1.8rem 0 .5rem}.prose img+em{display:block;font-style:normal;font-size:.76rem;color:var(--muted);line-height:1.8;margin-bottom:1.8rem}.prose .table-wrap{margin:1.5rem 0;overflow-x:auto;-webkit-overflow-scrolling:touch}.prose table{width:100%;border-collapse:separate;border-spacing:0;margin:0;font-size:.88rem;border:1px solid var(--line);border-radius:var(--r-sm);overflow:hidden}.prose th{background:var(--mizu-light);color:var(--ink);font-weight:900;font-size:.8rem;letter-spacing:.08em;border-bottom:1px solid var(--line)}.prose th,.prose td{padding:.75rem .95rem;text-align:left}.prose th{word-break:keep-all}.prose td{border-bottom:1px solid var(--line-soft)}.prose tbody tr:last-child td{border-bottom:none}.prose blockquote{margin:1.6rem 0;padding:1rem 1.3rem;border-left:4px solid var(--mizu);border-radius:0 var(--r-sm) var(--r-sm) 0;background:var(--mizu-light);color:var(--ink-soft)}.prose blockquote p{margin:0}@media(max-width:640px){.prose table{min-width:34rem}}.site-header[data-astro-cid-3ef6ksr2]{position:sticky;top:0;z-index:50;background:var(--paper);border-bottom:var(--bw) solid var(--edge);transition:background .25s ease,border-color .25s ease}.site-header[data-astro-cid-3ef6ksr2][data-tone=umi].at-top{background:var(--band-bg, var(--umi));border-color:var(--band-bg, var(--umi))}.site-header[data-astro-cid-3ef6ksr2][data-tone=cover].at-top{background:transparent;border-color:transparent}.site-header[data-astro-cid-3ef6ksr2][data-tone].at-top .logo-text[data-astro-cid-3ef6ksr2],.site-header[data-astro-cid-3ef6ksr2][data-tone].at-top .logo-text[data-astro-cid-3ef6ksr2] strong[data-astro-cid-3ef6ksr2],.site-header[data-astro-cid-3ef6ksr2][data-tone].at-top .nav-link[data-astro-cid-3ef6ksr2]{color:var(--paper)}.site-header[data-astro-cid-3ef6ksr2][data-tone].at-top .nav-link[data-astro-cid-3ef6ksr2]:hover{background:var(--ink);color:var(--sun)}.bar[data-astro-cid-3ef6ksr2]{display:flex;align-items:center;gap:1.5rem;min-height:66px;padding-block:.4rem}.logo[data-astro-cid-3ef6ksr2]{display:flex;align-items:center}.logo-text[data-astro-cid-3ef6ksr2]{font-family:var(--font-logo);font-style:normal;font-size:1.5rem;font-weight:900;color:var(--ink);line-height:1;transition:color .25s ease}.logo-text[data-astro-cid-3ef6ksr2] strong[data-astro-cid-3ef6ksr2]{font-weight:900;color:var(--umi);transition:color .25s ease}.logo-text[data-astro-cid-3ef6ksr2] .k-e1[data-astro-cid-3ef6ksr2],.logo-text[data-astro-cid-3ef6ksr2] .k-o[data-astro-cid-3ef6ksr2]{margin-left:-.07em}.logo-text[data-astro-cid-3ef6ksr2] .k-w[data-astro-cid-3ef6ksr2]{margin-left:-.08em}.logo-text[data-astro-cid-3ef6ksr2] .k-n[data-astro-cid-3ef6ksr2]{margin-left:-.05em}.logo-text[data-astro-cid-3ef6ksr2] .k-e2[data-astro-cid-3ef6ksr2],.logo-text[data-astro-cid-3ef6ksr2] .k-r[data-astro-cid-3ef6ksr2]{margin-left:-.04em}.nav[data-astro-cid-3ef6ksr2]{display:flex;flex-wrap:wrap;gap:.15rem;margin-left:.5rem}.nav-link[data-astro-cid-3ef6ksr2]{padding:.4rem .8rem;font-size:.82rem;font-weight:900;letter-spacing:.08em;color:var(--ink);white-space:nowrap;transition:background .15s ease,color .15s ease}.nav-link[data-astro-cid-3ef6ksr2]:hover{background:var(--ink);color:var(--sun)}.nav-link--en[data-astro-cid-3ef6ksr2]{font-family:var(--font-michroma);font-weight:400;font-size:.68rem;letter-spacing:.12em;padding:.5rem .7rem}.mnav-en[data-astro-cid-3ef6ksr2]{display:inline-block;min-width:6.2em;margin-right:.6em;font-family:var(--font-michroma);font-weight:400;font-size:.66rem;letter-spacing:.12em;color:var(--muted)}.mnav[data-astro-cid-3ef6ksr2]{display:none;margin-left:auto;position:relative}.mnav[data-astro-cid-3ef6ksr2] summary[data-astro-cid-3ef6ksr2]{list-style:none;cursor:pointer;width:42px;height:42px;display:grid;place-items:center}.mnav[data-astro-cid-3ef6ksr2] summary[data-astro-cid-3ef6ksr2]::-webkit-details-marker{display:none}.mnav-ico[data-astro-cid-3ef6ksr2]{position:relative;width:18px;height:2px;background:currentColor;color:var(--ink);transition:color .15s ease}.mnav-ico[data-astro-cid-3ef6ksr2]:before,.mnav-ico[data-astro-cid-3ef6ksr2]:after{content:"";position:absolute;left:0;width:18px;height:2px;background:currentColor}.mnav-ico[data-astro-cid-3ef6ksr2]:before{top:-6px}.mnav-ico[data-astro-cid-3ef6ksr2]:after{top:6px}.mnav[data-astro-cid-3ef6ksr2][open] .mnav-ico[data-astro-cid-3ef6ksr2]{color:var(--umi)}.mnav-panel[data-astro-cid-3ef6ksr2]{position:absolute;right:0;top:52px;min-width:220px;z-index:60;background:var(--paper);border:var(--bw) solid var(--edge);border-radius:var(--r-md);box-shadow:var(--shadow-ink);padding:.55rem;display:flex;flex-direction:column;gap:.1rem}.mnav-panel[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]{padding:.65rem .85rem;border-radius:var(--r-sm);font-weight:700;font-size:.95rem;color:var(--ink);white-space:nowrap}.mnav-panel[data-astro-cid-3ef6ksr2] a[data-astro-cid-3ef6ksr2]:hover{background:var(--mizu-light);color:var(--umi)}.mnav-cta[data-astro-cid-3ef6ksr2]{margin-top:.4rem;background:var(--moss);color:#fff!important;text-align:center;border:var(--bw-sm) solid var(--edge);border-radius:var(--r-pill);box-shadow:var(--shadow-ink-sm)}@media(max-width:900px){.nav[data-astro-cid-3ef6ksr2]{display:none}.mnav[data-astro-cid-3ef6ksr2]{display:block}}.site-footer[data-astro-cid-sz7xmlte]{background:var(--mizu-light);color:var(--ink-soft);margin-top:5rem;padding:3.5rem 0 1.5rem;border-top:var(--bw) solid var(--edge)}.top[data-astro-cid-sz7xmlte]{display:flex;flex-wrap:wrap;gap:2.5rem;justify-content:space-between}.logo-text[data-astro-cid-sz7xmlte]{font-family:var(--font-logo);font-style:normal;font-size:1.4rem;font-weight:900;color:var(--ink)}.logo-text[data-astro-cid-sz7xmlte] strong[data-astro-cid-sz7xmlte]{font-weight:900;color:var(--umi)}.logo-text[data-astro-cid-sz7xmlte] .k-e1[data-astro-cid-sz7xmlte],.logo-text[data-astro-cid-sz7xmlte] .k-o[data-astro-cid-sz7xmlte]{margin-left:-.07em}.logo-text[data-astro-cid-sz7xmlte] .k-w[data-astro-cid-sz7xmlte]{margin-left:-.08em}.logo-text[data-astro-cid-sz7xmlte] .k-n[data-astro-cid-sz7xmlte]{margin-left:-.05em}.logo-text[data-astro-cid-sz7xmlte] .k-e2[data-astro-cid-sz7xmlte],.logo-text[data-astro-cid-sz7xmlte] .k-r[data-astro-cid-sz7xmlte]{margin-left:-.04em}.tagline[data-astro-cid-sz7xmlte]{color:var(--ink-soft);margin-top:.6rem;max-width:22ch;font-weight:500;word-break:keep-all}.cols[data-astro-cid-sz7xmlte]{display:flex;gap:clamp(1.6rem,3vw,3rem);flex-wrap:wrap}.cols[data-astro-cid-sz7xmlte] h4[data-astro-cid-sz7xmlte]{color:var(--ink);font-size:.78rem;font-weight:900;margin:0 0 .8rem;letter-spacing:.14em}.cols[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]{display:block;color:var(--ink-soft);font-size:.9rem;font-weight:500;padding:.25rem 0;transition:color .15s ease}.cols[data-astro-cid-sz7xmlte] a[data-astro-cid-sz7xmlte]:hover{color:var(--umi)}.bottom[data-astro-cid-sz7xmlte]{display:flex;flex-wrap:wrap;gap:1rem;justify-content:space-between;margin-top:2.5rem;padding-top:1.5rem;border-top:1.5px dashed var(--line);color:var(--muted);font-size:.74rem;font-family:var(--font-mono);letter-spacing:.08em}