:root{--color-brand-navy:#092653;--color-action:#2871e8;--color-action-hover:#1d5fd0;--color-action-text:#1d5fd0;--color-action-soft:#e6f0ff;--color-action-soft-hover:#d6e6ff;--color-on-action:#fff;--color-focus-ring:#2871e8;--color-assured:#ddf72f;--color-assured-soft:#f4f8b9;--color-assured-ink:#101828;--color-assured-text:#4d6400;--color-surface:#f5f6fa;--color-surface-raised:#fff;--color-surface-sunken:#eef0f5;--color-line:#e3e6ee;--color-line-strong:#c9ced9;--color-ink:#101828;--color-ink-muted:#4b5565;--color-ink-subtle:#667085;--color-warning-text:#92400e;--color-warning-soft:#fef3c7;--color-on-navy:#fff;--color-on-navy-muted:#c7d2e0;--font-sans:"UD新ゴ Pr6N", "UDShinGoPr6N", "Hiragino Sans", "Hiragino Kaku Gothic ProN", "Yu Gothic UI", "Noto Sans JP", Meiryo, system-ui, sans-serif;--font-latin:Inter, var(--font-sans);--text-xs:.75rem;--text-sm:.875rem;--text-base:1rem;--text-lg:1.125rem;--text-xl:1.375rem;--text-2xl:1.75rem;--text-3xl:clamp(1.75rem, 1.2rem + 2vw, 2.5rem);--text-4xl:clamp(2rem, 1.3rem + 3vw, 3.25rem);--leading-tight:1.4;--leading-body:1.8;--tracking-ja:.04em;--space-1:.25rem;--space-2:.5rem;--space-3:.75rem;--space-4:1rem;--space-6:1.5rem;--space-8:2rem;--space-12:3rem;--space-16:4rem;--space-24:6rem;--container-max:75rem;--container-gutter:var(--space-4);--header-height:4.5rem;--radius-sm:4px;--radius-md:8px;--radius-lg:12px;--radius-full:9999px;--shadow-card:0 1px 2px #1018280f;--shadow-pop:0 8px 24px #1018281f;--control-height:2.75rem}@media (width>=768px){:root{--container-gutter:var(--space-8)}}*,:before,:after{box-sizing:border-box}html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-padding-top:var(--header-height)}body{font-family:var(--font-sans);font-size:var(--text-base);line-height:var(--leading-body);letter-spacing:var(--tracking-ja);color:var(--color-ink);background:var(--color-surface-raised);font-feature-settings:"palt" 0;-webkit-font-smoothing:antialiased;margin:0}html[lang=en] 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.15s;display:inline-flex}.btn--primary{background:var(--color-action);color:var(--color-on-action)}.btn--primary:hover{background:var(--color-action-hover)}.btn--secondary{background:var(--color-action-soft);color:var(--color-action-text)}.btn--secondary:hover{background:var(--color-action-soft-hover)}.btn--ghost-light{border-color:var(--color-on-navy);color:var(--color-on-navy)}.btn--ghost-light:hover{background:#ffffff1a}.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(--space-4);z-index:100;padding:var(--space-2) var(--space-4);background:var(--color-action);color:var(--color-on-action);border-radius:var(--radius-md);position:absolute;top:-100px}.skip-link:focus{top:var(--space-2)}.prose{max-width:46rem}.prose h2{font-size:var(--text-2xl);margin-top:var(--space-12)}.prose h3{margin-top:var(--space-8)}.prose img{border-radius:var(--radius-md)}@media 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var(--space-2);font-size:var(--text-xs);color:var(--color-ink-subtle);letter-spacing:.08em;font-weight:700}.mega[data-astro-cid-nen7h5rs] ul[data-astro-cid-nen7h5rs]{margin:0;padding:0;list-style:none}.mega__link[data-astro-cid-nen7h5rs]{padding:var(--space-2) 0;color:var(--color-ink);text-decoration:none;display:block}.mega__link[data-astro-cid-nen7h5rs]:hover .mega__label[data-astro-cid-nen7h5rs]{color:var(--color-action-text)}.mega__label[data-astro-cid-nen7h5rs]{font-weight:700;display:block}.mega__desc[data-astro-cid-nen7h5rs]{font-size:var(--text-sm);color:var(--color-ink-muted);display:block}.site-header__actions[data-astro-cid-nen7h5rs]{align-items:flex-start;gap:var(--space-4);margin-top:var(--space-6);flex-direction:column;display:flex}@media (width>=1024px){.site-header__toggle[data-astro-cid-nen7h5rs]{display:none}.site-header__nav[data-astro-cid-nen7h5rs]{max-height:none;box-shadow:none;background:0 0;border:0;flex:1;justify-content:space-between;align-items:center;padding:0;display:flex;position:static;overflow:visible}.menu[data-astro-cid-nen7h5rs]{gap:var(--space-8);margin-left:var(--space-8);display:flex}.menu__item[data-astro-cid-nen7h5rs]{position:static}.menu__trigger[data-astro-cid-nen7h5rs],.menu__link[data-astro-cid-nen7h5rs]{width:auto;min-height:var(--header-height)}.mega[data-astro-cid-nen7h5rs]{background:var(--color-surface-raised);border-top:1px solid var(--color-line);border-bottom:1px solid var(--color-line);box-shadow:var(--shadow-pop);position:absolute;inset:100% 0 auto}.mega__inner[data-astro-cid-nen7h5rs]{padding:var(--space-8) var(--container-gutter);grid-template-columns:repeat(auto-fit,minmax(14rem,1fr))}.site-header__actions[data-astro-cid-nen7h5rs]{align-items:center;gap:var(--space-6);flex-direction:row;margin:0}}.site-footer[data-astro-cid-jo6i4kqk]{padding-block:var(--space-16) var(--space-8);background:var(--color-brand-navy);color:var(--color-on-navy-muted);font-size:var(--text-sm)}.site-footer[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]{color:var(--color-on-navy-muted);text-decoration:none}.site-footer[data-astro-cid-jo6i4kqk] a[data-astro-cid-jo6i4kqk]:hover{color:var(--color-on-navy);text-decoration:underline}.site-footer[data-astro-cid-jo6i4kqk] ul[data-astro-cid-jo6i4kqk]{margin:0;padding:0;list-style:none}.site-footer[data-astro-cid-jo6i4kqk] li[data-astro-cid-jo6i4kqk]+li[data-astro-cid-jo6i4kqk]{margin-top:var(--space-2)}.site-footer__top[data-astro-cid-jo6i4kqk]{gap:var(--space-8);grid-template-columns:repeat(auto-fit,minmax(12rem,1fr));display:grid}.site-footer__heading[data-astro-cid-jo6i4kqk]{margin-bottom:var(--space-3);color:var(--color-on-navy);font-weight:700}.site-footer__bottom[data-astro-cid-jo6i4kqk]{justify-content:space-between;gap:var(--space-4);margin-top:var(--space-12);padding-top:var(--space-6);border-top:1px solid #ffffff26;flex-wrap:wrap;display:flex}.site-footer__bottom[data-astro-cid-jo6i4kqk] p[data-astro-cid-jo6i4kqk]{margin:0}.site-footer__legal[data-astro-cid-jo6i4kqk]{gap:var(--space-6);display:flex}.site-footer__legal[data-astro-cid-jo6i4kqk] li[data-astro-cid-jo6i4kqk]+li[data-astro-cid-jo6i4kqk]{margin-top:0}