:root{--bg:#081b31;--bg-deep:#06162a;--surface:#102d4b;--ink:#f3f5f7;--muted:#b6c4d4;--accent:#d6ae70;--line:#b6c4d438;--line-strong:#b6c4d48c;--button:#f4eee4;--button-hover:#fff;--button-ink:#0b1e35;--focus:#f0cf95;--danger:#ffab98;--ok:#9fdcb2;--font-display:"Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--font-body:"Manrope", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;--display-weight:500;--display-tracking:-.022em;--body-leading:1.6;--measure:68ch;--container:1280px;--gutter:clamp(20px, 5vw, 80px);--space-tight:48px;--space-loose:120px;--radius:6px;--radius-panel:10px;--ease-out-quart:cubic-bezier(.25, 1, .5, 1);color-scheme:dark}html[lang=ja]{--font-body:"Hiragino Sans", "Yu Gothic UI", "Yu Gothic", "Meiryo", "Noto Sans JP", sans-serif;--font-display:var(--font-body);--display-weight:700;--display-tracking:0;--body-leading:1.75;--measure:40em}html[lang=zh]{--font-body:"PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;--font-display:var(--font-body);--display-weight:700;--display-tracking:0;--body-leading:1.75;--measure:40em}html[lang=ja] :is(h1,h2,h3,p,li,dd,dt),html[lang=zh] :is(h1,h2,h3,p,li,dd,dt){word-break:auto-phrase;line-break:strict}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%}body{background:var(--bg);color:var(--ink);font-family:var(--font-body);font-size:1.0625rem;line-height:var(--body-leading);overflow-wrap:break-word;margin:0;font-weight:400}h1,h2,h3{font-family:var(--font-display);font-weight:var(--display-weight);letter-spacing:var(--display-tracking);text-wrap:balance;overflow-wrap:break-word;hyphens:auto;margin:0;line-height:1.15}h1{font-size:clamp(2.25rem,1.4rem + 3.2vw,3.75rem);font-weight:500;line-height:1.08}h2{font-size:clamp(1.6rem,1.2rem + 1.6vw,2.4rem)}h3{font-size:1.3rem;line-height:1.3}p{max-width:var(--measure);margin:0}small,.small{font-size:.875rem}a{color:var(--accent);text-underline-offset:.18em;transition:color .15s var(--ease-out-quart);text-decoration-thickness:1px}a:hover{color:var(--ink)}:focus-visible{outline:2px solid var(--focus);outline-offset:2px;border-radius:2px}img{max-width:100%;height:auto;display:block}.container{width:100%;max-width:calc(var(--container) + 2 * var(--gutter));padding-inline:var(--gutter);margin-inline:auto}.section{padding-block:var(--space-tight)}.section--loose{padding-block:clamp(var(--space-tight), 10vw, var(--space-loose))}.section--surface{background:var(--surface)}.stack>*+*{margin-top:1rem}.lead{color:var(--muted);font-size:1.1875rem}.muted{color:var(--muted)}.visually-hidden{clip:rect(0 0 0 0);white-space:nowrap;border:0;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;position:absolute!important}.skip-link{left:var(--gutter);z-index:10;background:var(--button);color:var(--button-ink);border-radius:var(--radius);padding:.5rem 1rem;font-weight:600;position:absolute;top:-100px}.skip-link:focus{top:8px}.button{border-radius:var(--radius);min-height:48px;font:inherit;cursor:pointer;transition:background-color .15s var(--ease-out-quart), color .15s var(--ease-out-quart), border-color .15s var(--ease-out-quart);border:1px solid #0000;justify-content:center;align-items:center;padding:.7rem 1.4rem;font-weight:600;line-height:1.2;text-decoration:none;display:inline-flex}.button--primary{background:var(--button);color:var(--button-ink)}.button--primary:hover{background:var(--button-hover);color:var(--button-ink)}.button--ghost{color:var(--ink);background:0 0;border-color:#d6ae70bf}.button--ghost:hover{border-color:var(--accent);color:var(--ink);background:#d6ae701f}.button[disabled],.button[aria-disabled=true]{opacity:.6;cursor:progress}.notice{border:1px solid var(--accent);border-radius:var(--radius);color:var(--accent);background:#d6ae701a;padding:.35rem .7rem;font-size:.875rem;font-weight:500;line-height:1.4;display:inline-block}.link-arrow{white-space:nowrap;font-weight:600;text-decoration:none}.link-arrow:after{content:" →"}.link-arrow:hover{text-decoration:underline}.facts{border-top:1px solid var(--line);grid-template-columns:minmax(10rem,16rem) 1fr;margin:0;display:grid}.facts dt,.facts dd{border-bottom:1px solid var(--line);margin:0;padding:.8rem 0}.facts dt{color:var(--muted);padding-right:1.5rem}.facts dd{font-weight:500}@media (width<=640px){.facts{grid-template-columns:1fr}.facts dt{border-bottom:0;padding-bottom:0;font-size:.875rem}.facts dd{padding-top:.15rem}}@media (prefers-reduced-motion:reduce){*,:before,:after{transition:none!important;animation:none!important;transform:none!important}}.page-head{padding-block:clamp(40px,6vw,72px) clamp(24px,4vw,40px)}.page-head__lead{margin-top:1rem}.page-head .notice{margin-top:1.25rem}