:root{--ink:#17263b;--ink-2:#3e5065;--brand:#1d4fa8;--brand-strong:#0d3a73;--link:#0b57d0;--bg:#ffffff;--bg-soft:#f2f7fd;--bg-mid:#e8f1fb;--line:#c9dcf2;--footer-bg:#0a2a52;--footer-ink:#dce9f9;--focus:#0b57d0;--radius:14px;--maxw:72rem;--content:46rem}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP","Yu Gothic UI",Meiryo,sans-serif;font-size:1rem;line-height:1.9;color:var(--ink);background:var(--bg);overflow-wrap:break-word}
h1,h2,h3,p,ul,ol,figure,table{margin:0}
img,svg{max-width:100%;height:auto;vertical-align:middle}
a{color:var(--link);text-decoration:underline;text-underline-offset:.2em}
a:hover{text-decoration-thickness:.12em}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(1rem,4vw,2rem)}
.skip-link{position:absolute;left:-999px;top:0;background:var(--brand-strong);color:#fff;padding:.75rem 1.25rem;z-index:100;border-radius:0 0 8px 0}
.skip-link:focus{left:0}
.site-header{background:var(--bg);border-bottom:1px solid var(--line)}
.site-header-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:.5rem 1.5rem;padding-block:.75rem}
.brand{display:inline-flex;align-items:center;gap:.6rem;text-decoration:none;padding:.25rem 0;min-height:44px}
.brand-mark{flex:none}
.brand-name{font-weight:700;font-size:1.25rem;letter-spacing:.04em;color:var(--brand-strong)}
.site-nav ul{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.25rem}
.site-nav a{display:inline-block;padding:.7rem .9rem;text-decoration:none;color:var(--brand-strong);font-weight:600;border-radius:8px}
.site-nav a:hover{background:var(--bg-mid);text-decoration:underline}
main{display:block}
.hero{background:linear-gradient(135deg,#f3f8fe,#dcEAFa);padding-block:clamp(2.5rem,7vw,5rem)}
.hero-grid{display:grid;grid-template-columns:1fr;gap:2rem;align-items:center}
.hero h1{font-size:clamp(1.6rem,4.5vw,2.5rem);line-height:1.4;color:var(--brand-strong)}
.hero p{margin-top:1.25rem;font-size:1.06rem;color:var(--ink-2);max-width:38em}
.hero-art{display:none;text-align:center}
.hero-actions{margin-top:2rem;display:flex;flex-wrap:wrap;gap:1rem}
.btn{display:inline-block;background:var(--link);color:#fff;text-decoration:none;font-weight:700;padding:.85rem 1.6rem;border-radius:999px;min-height:44px}
.btn:hover{background:var(--brand-strong)}
.btn-ghost{display:inline-block;color:var(--brand-strong);background:var(--bg);border:2px solid var(--brand);text-decoration:none;font-weight:700;padding:.75rem 1.5rem;border-radius:999px;min-height:44px}
.btn-ghost:hover{background:var(--bg-mid)}
.section{padding-block:clamp(2.5rem,6vw,4.5rem)}
.section-alt{background:var(--bg-soft)}
.section-title{font-size:clamp(1.35rem,3vw,1.8rem);color:var(--brand-strong);line-height:1.5}
.section-lead{margin-top:.75rem;color:var(--ink-2);max-width:44em}
.card-grid{margin-top:2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:1.25rem;list-style:none;padding:0}
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.card-icon{width:52px;height:52px;border-radius:50%;background:var(--bg-mid);display:flex;align-items:center;justify-content:center;margin-bottom:1rem}
.card h3{font-size:1.08rem;line-height:1.5;color:var(--brand-strong)}
.card p{margin-top:.6rem;font-size:.95rem;color:var(--ink-2)}
.guide-card{display:flex;flex-direction:column;background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem}
.guide-card h3{font-size:1.12rem;line-height:1.55}
.guide-card h3 a{color:var(--brand-strong);text-decoration:none}
.guide-card h3 a:hover{text-decoration:underline}
.guide-card p{margin-top:.6rem;font-size:.95rem;color:var(--ink-2);flex-grow:1}
.trust-list{margin-top:2rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:1.25rem;list-style:none;padding:0}
.breadcrumb{padding-block:1rem}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:.25rem;font-size:.9rem}
.breadcrumb li+li::before{content:"›";content:"›" / "";margin-inline:.5rem;color:var(--ink-2)}
.breadcrumb a{color:var(--ink-2)}
.breadcrumb [aria-current]{color:var(--ink);font-weight:600}
.page-main{padding-block:1rem 4rem}
.content{max-width:var(--content);margin-inline:auto}
.page-title{font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.45;color:var(--brand-strong);margin-top:1rem}
.page-intro{margin-top:1.25rem;color:var(--ink-2)}
.article-meta{margin-top:1.25rem;display:flex;flex-wrap:wrap;gap:.5rem 1.5rem;font-size:.9rem;color:var(--ink-2);list-style:none;padding:0}
.summary-card{margin-top:2rem;background:var(--bg-mid);border:1px solid var(--line);border-left:5px solid var(--brand);border-radius:var(--radius);padding:1.5rem 1.75rem}
.summary-card h2{font-size:1.05rem;color:var(--brand-strong)}
.summary-card ul{margin:1rem 0 0;padding-left:1.3em}
.summary-card li{margin-top:.4rem}
.article-hero{margin-top:2rem}
.article-hero img{width:100%;border-radius:var(--radius);border:1px solid var(--line)}
.article-body{margin-top:1rem}
.article-body h2{font-size:1.4rem;line-height:1.55;color:var(--brand-strong);margin-top:3rem;padding:.35rem 0 .35rem .85rem;border-left:5px solid var(--brand)}
.article-body h3{font-size:1.15rem;line-height:1.6;color:var(--brand-strong);margin-top:2rem}
.article-body p{margin-top:1.1rem}
.article-body ul,.article-body ol{margin-top:1.1rem;padding-left:1.5em}
.article-body li{margin-top:.5rem}
.article-body ol.steps{list-style:none;padding:0;counter-reset:step}
.article-body ol.steps>li{counter-increment:step;position:relative;margin-top:1rem;padding:1rem 1.25rem 1rem 3.6rem;background:var(--bg-soft);border:1px solid var(--line);border-radius:10px}
.article-body ol.steps>li::before{content:counter(step);position:absolute;left:1rem;top:1rem;width:1.9rem;height:1.9rem;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.95rem}
.table-scroll{margin-top:1.5rem;overflow-x:auto}
.table-scroll table{border-collapse:collapse;width:100%;min-width:34rem;font-size:.95rem}
.table-scroll caption{text-align:left;font-weight:700;color:var(--brand-strong);padding-bottom:.6rem}
.table-scroll th,.table-scroll td{border:1px solid var(--line);padding:.7rem .9rem;text-align:left;vertical-align:top;line-height:1.7}
.table-scroll thead th{background:var(--bg-mid);color:var(--brand-strong)}
.table-scroll tbody tr:nth-child(even){background:var(--bg-soft)}
.note{margin-top:1.5rem;background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;padding:1rem 1.25rem}
.note p{margin-top:0}
.note p+p{margin-top:.75rem}
.disclosure{margin-top:1.5rem;background:var(--bg-mid);border:1px solid var(--line);border-left:5px solid var(--brand-strong);border-radius:10px;padding:1rem 1.25rem;font-size:.93rem;color:var(--ink-2)}
.disclosure p{margin-top:0}
.faq-item{margin-top:1rem;border:1px solid var(--line);border-radius:10px;background:var(--bg)}
.faq-item summary{cursor:pointer;font-weight:700;padding:1rem 1.25rem;color:var(--brand-strong);border-radius:10px}
.faq-item summary:hover{background:var(--bg-soft)}
.faq-item[open] summary{border-bottom:1px solid var(--line);border-radius:10px 10px 0 0}
.faq-item p{padding:1rem 1.25rem;margin:0}
.related-guides{margin-top:3rem;padding-top:2rem;border-top:1px solid var(--line)}
.related-guides h2{font-size:1.25rem;color:var(--brand-strong)}
.related-list{list-style:none;margin:1.25rem 0 0;padding:0;display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,16rem),1fr));gap:1rem}
.related-list li{border:1px solid var(--line);border-radius:10px;padding:1.1rem 1.25rem;background:var(--bg-soft)}
.related-list a{font-weight:700}
.related-list p{margin-top:.4rem;font-size:.9rem;color:var(--ink-2)}
.sources{margin-top:1.1rem;padding-left:1.5em}
.info-table{margin-top:2rem}
.info-table table{min-width:0}
.info-table th{width:34%;background:var(--bg-mid);color:var(--brand-strong)}
.contact-block{margin-top:1.5rem;border:1px solid var(--line);border-radius:var(--radius);padding:1.5rem 1.75rem;background:var(--bg-soft)}
.contact-block h2{font-size:1.15rem;color:var(--brand-strong)}
.contact-block p{margin-top:.75rem}
.policy-body h2{font-size:1.3rem;line-height:1.55;color:var(--brand-strong);margin-top:2.75rem;padding:.3rem 0 .3rem .85rem;border-left:5px solid var(--brand)}
.policy-body p{margin-top:1.1rem}
.policy-body ul{margin-top:1.1rem;padding-left:1.5em}
.policy-body li{margin-top:.5rem}
.updated{margin-top:3rem;font-size:.9rem;color:var(--ink-2)}
.error-page{text-align:center;padding-block:4rem}
.error-page .page-title{margin-top:1.5rem}
.error-actions{margin-top:2rem;display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}
.site-footer{margin-top:4rem;background:var(--footer-bg);color:var(--footer-ink);padding-block:3rem 2rem}
.site-footer a{color:#fff}
.site-footer :focus-visible{outline-color:#9ec5ff}
.footer-grid{display:grid;grid-template-columns:1fr;gap:2rem}
.footer-logo{font-weight:700;font-size:1.15rem;letter-spacing:.04em;color:#fff}
.footer-brand p{margin-top:.75rem;font-size:.92rem;max-width:34em}
.footer-heading{font-weight:700;color:#fff;margin:0 0 .75rem;font-size:.98rem}
.footer-nav ul,.footer-social{list-style:none;margin:0;padding:0}
.footer-nav li,.footer-social li{margin-top:.5rem}
.footer-nav a,.footer-social a{display:inline-block;padding:.55rem 0;min-height:44px}
.footer-social{margin-top:1rem;display:flex;gap:1.5rem}
.footer-legal{margin-top:2.5rem;padding-top:1.5rem;border-top:1px solid #24466e;font-size:.85rem}
.footer-legal p{margin-top:.5rem}
.footer-copy{margin-top:1.25rem;color:#aac4e4}
@media (min-width:48em){
.hero-grid{grid-template-columns:1.2fr .8fr}
.hero-art{display:block}
.footer-grid{grid-template-columns:2fr 1fr 1fr}
}
@media (prefers-reduced-motion:reduce){
html{scroll-behavior:auto}
*,*::before,*::after{animation:none!important;transition:none!important}
}