*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;text-size-adjust:100%;scroll-behavior:smooth}
:root{
--blue-900:#0b1e4d;--blue-800:#123a8a;--blue-700:#1d4ed8;--blue-600:#2563eb;--blue-500:#3b82f6;
--blue-100:#dbe7ff;--blue-50:#f4f8ff;
--ink:#0f172a;--ink-2:#334155;--muted:#475569;--line:#e2e8f0;
--bg:#ffffff;--soft:#f4f8ff;--card:#ffffff;
--focus:#1d4ed8;--radius:16px;--radius-sm:10px;
--shadow:0 1px 2px rgba(15,23,42,.06),0 8px 24px rgba(15,23,42,.06);
--wrap:1120px;--space:clamp(20px,5vw,40px);
--font:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","Hiragino Kaku Gothic ProN","Hiragino Sans","Noto Sans JP",Meiryo,"Yu Gothic",Arial,sans-serif;
}
html{color-scheme:light}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:17px;line-height:1.75;font-feature-settings:"palt" 1;-webkit-font-smoothing:antialiased;letter-spacing:.01em}
h1,h2,h3,h4,p,ul,ol,figure,dl{margin:0}
img,svg{max-width:100%;height:auto;display:block}
a{color:var(--blue-700);text-underline-offset:.18em;text-decoration-thickness:.08em}
a:hover{color:var(--blue-800)}
strong{font-weight:700}
:focus-visible{outline:3px solid var(--focus);outline-offset:2px;border-radius:4px}
main[tabindex="-1"]:focus{outline:none}
.table-wrap:focus-visible{outline:3px solid var(--focus);outline-offset:2px}
::selection{background:var(--blue-100);color:var(--ink)}
.skip-link{position:absolute;left:12px;top:-56px;z-index:100;background:var(--blue-700);color:#fff;padding:12px 18px;border-radius:0 0 10px 10px;text-decoration:none;transition:top .15s ease}
.skip-link:focus{top:0;color:#fff}
.container{width:100%;max-width:var(--wrap);margin-inline:auto;padding-inline:var(--space)}
.visually-hidden{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;border:0}

.site-header{position:relative;background:rgba(255,255,255,.92);backdrop-filter:saturate(1.4) blur(6px);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:66px;flex-wrap:wrap}
.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;color:var(--ink);font-weight:800;letter-spacing:.06em;font-size:1.12rem;padding:6px 4px}
.brand__mark{width:38px;height:38px;flex:0 0 auto}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
.nav a{display:inline-flex;align-items:center;min-height:44px;padding:6px 14px;border-radius:999px;text-decoration:none;color:var(--ink-2);font-weight:600;font-size:.98rem}
.nav a:hover{background:var(--soft);color:var(--blue-800)}
.nav a[aria-current="page"]{background:var(--blue-700);color:#fff}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:48px;padding:12px 22px;border-radius:999px;font-weight:700;font-size:1rem;text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:transform .12s ease,background .12s ease,border-color .12s ease}
.btn--primary{background:var(--blue-700);color:#fff}
.btn--primary:hover{background:var(--blue-800);color:#fff;transform:translateY(-1px)}
.btn--ghost{background:#fff;color:var(--blue-800);border-color:var(--blue-100)}
.btn--ghost:hover{background:var(--soft);color:var(--blue-800);border-color:var(--blue-500)}

.hero{background:linear-gradient(180deg,var(--soft) 0%,#fff 100%);border-bottom:1px solid var(--line)}
.hero__inner{display:grid;grid-template-columns:1fr;gap:36px;align-items:center;padding-block:clamp(44px,7vw,84px)}
.eyebrow{display:inline-block;font-size:.82rem;font-weight:700;letter-spacing:.14em;text-transform:uppercase;color:var(--blue-700);background:var(--blue-100);padding:6px 14px;border-radius:999px;margin-bottom:18px}
.hero h1{font-size:clamp(1.9rem,4.6vw,3rem);line-height:1.28;font-weight:800;letter-spacing:.01em}
.hero .lead{margin-top:18px;font-size:clamp(1.03rem,1.8vw,1.2rem);color:var(--ink-2);max-width:60ch}
.hero__actions{margin-top:30px;display:flex;flex-wrap:wrap;gap:14px}
.hero__art{justify-self:center;width:min(320px,80%)}

.section{padding-block:clamp(48px,7vw,80px)}
.section--soft{background:var(--soft);border-block:1px solid var(--line)}
.section__head{max-width:64ch;margin-bottom:clamp(28px,4vw,44px)}
.section__title{font-size:clamp(1.5rem,3vw,2.05rem);font-weight:800;line-height:1.35}
.section__sub{margin-top:12px;color:var(--ink-2);font-size:1.05rem}

.grid{display:grid;gap:20px}
.grid--4{grid-template-columns:1fr}
.grid--3{grid-template-columns:1fr}
.grid--2{grid-template-columns:1fr}

.feature{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow);height:100%}
.feature__icon{width:52px;height:52px;display:grid;place-items:center;border-radius:14px;background:var(--blue-50);color:var(--blue-700);margin-bottom:16px}
.feature__icon svg{width:28px;height:28px}
.feature__title{font-size:1.16rem;font-weight:800;margin-bottom:8px}
.feature__text{color:var(--ink-2);font-size:.99rem}
.feature__badge{display:inline-block;margin-top:14px;font-size:.78rem;font-weight:700;letter-spacing:.08em;color:var(--blue-700);background:var(--blue-100);padding:4px 10px;border-radius:999px}

.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 26px;box-shadow:var(--shadow);height:100%}
.card__tag{align-self:flex-start;font-size:.78rem;font-weight:700;letter-spacing:.06em;color:var(--blue-700);background:var(--blue-100);padding:5px 12px;border-radius:999px;margin-bottom:16px}
.card__title{font-size:1.28rem;font-weight:800;line-height:1.4;margin-bottom:10px}
.card__title a{color:var(--ink);text-decoration:none}
.card__title a:hover{color:var(--blue-800)}
.card__text{color:var(--ink-2);font-size:1rem;flex:1}
.card__more{margin-top:18px;font-weight:700;color:var(--blue-700);text-decoration:none;display:inline-flex;align-items:center;gap:7px}
.card__more:hover{color:var(--blue-800);gap:11px}
.card__more::after{content:"→";transition:transform .12s ease}

.privacy-band{background:linear-gradient(180deg,#fff,var(--soft));border:1px solid var(--line);border-radius:var(--radius);padding:clamp(28px,4vw,44px);box-shadow:var(--shadow);display:grid;gap:22px;align-items:center;text-align:center}
.privacy-band h2{font-size:clamp(1.4rem,2.6vw,1.85rem);font-weight:800}
.privacy-band p{color:var(--ink-2);max-width:70ch;margin-inline:auto}
.privacy-band .badges{display:flex;flex-wrap:wrap;gap:12px;justify-content:center}
.pill{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--blue-100);color:var(--blue-800);font-weight:700;font-size:.92rem;padding:9px 16px;border-radius:999px}
.pill svg{width:18px;height:18px;color:var(--blue-700)}

.breadcrumb{padding-top:26px}
.breadcrumb ol{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;font-size:.9rem;color:var(--muted)}
.breadcrumb li{display:flex;align-items:center;gap:8px}
.breadcrumb li+li::before{content:"/";color:#94a3b8}
.breadcrumb a{color:var(--blue-700);text-decoration:none}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb [aria-current="page"]{color:var(--ink-2)}

.page-head{padding-block:clamp(26px,4vw,40px) 6px}
.page-head h1{font-size:clamp(1.8rem,4vw,2.6rem);font-weight:800;line-height:1.3}
.page-head .lead{margin-top:16px;color:var(--ink-2);font-size:1.1rem;max-width:70ch}
.meta{margin-top:18px;display:flex;flex-wrap:wrap;gap:8px 20px;color:var(--muted);font-size:.92rem}
.meta strong{color:var(--ink-2);font-weight:700}

.article{padding-block:clamp(30px,4vw,48px)}
.prose{max-width:74ch}
.prose>*+*{margin-top:22px}
.prose h2{font-size:clamp(1.4rem,2.8vw,1.85rem);font-weight:800;line-height:1.4;margin-top:52px;padding-top:8px}
.prose h3{font-size:clamp(1.15rem,2vw,1.35rem);font-weight:800;margin-top:34px}
.prose p{color:var(--ink)}
.prose ul,.prose ol{padding-left:1.3em;color:var(--ink)}
.prose li+li{margin-top:8px}
.prose a{font-weight:600}
.prose figure{margin:0}

.summary{background:var(--blue-50);border:1px solid var(--blue-100);border-left:5px solid var(--blue-600);border-radius:var(--radius-sm);padding:24px 26px}
.summary h2{margin:0 0 12px;font-size:1.12rem;font-weight:800;color:var(--blue-800);display:flex;align-items:center;gap:10px}
.summary h2 svg{width:22px;height:22px;flex:0 0 auto}
.summary ul{margin:0;padding-left:1.2em}
.summary li{color:var(--ink)}
.summary li+li{margin-top:8px}

.note{background:#fff;border:1px solid var(--line);border-left:5px solid var(--blue-500);border-radius:var(--radius-sm);padding:20px 22px;color:var(--ink-2);font-size:.97rem}
.note strong{color:var(--ink)}

.steps{list-style:none;counter-reset:s;padding:0;margin:0}
.steps>li{position:relative;padding:2px 0 24px 62px;counter-increment:s}
.steps>li::before{content:counter(s);position:absolute;left:0;top:0;width:42px;height:42px;display:grid;place-items:center;border-radius:12px;background:var(--blue-700);color:#fff;font-weight:800;font-size:1.05rem}
.steps>li:not(:last-child)::after{content:"";position:absolute;left:21px;top:46px;bottom:6px;width:2px;background:var(--blue-100)}
.steps h3{margin:6px 0 6px;font-size:1.12rem}
.steps p{color:var(--ink-2);margin:0}

.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--radius-sm);-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;min-width:460px;font-size:.96rem}
caption{text-align:left;color:var(--muted);font-size:.88rem;padding:12px 16px}
th,td{text-align:left;padding:14px 16px;border-bottom:1px solid var(--line);vertical-align:top}
thead th{background:var(--soft);color:var(--ink);font-weight:800;border-bottom:2px solid var(--blue-100)}
tbody tr:last-child td{border-bottom:0}

.faq-block{border:1px solid var(--line);border-radius:var(--radius-sm);overflow:hidden}
details.qa{border-top:1px solid var(--line);background:#fff}
details.qa:first-of-type{border-top:0}
details.qa>summary{cursor:pointer;list-style:none;padding:18px 22px;font-weight:700;color:var(--ink);display:flex;justify-content:space-between;gap:16px;align-items:center}
details.qa>summary::-webkit-details-marker{display:none}
details.qa>summary::after{content:"+";font-size:1.4rem;color:var(--blue-700);line-height:1}
details.qa[open]>summary::after{content:"–"}
details.qa>div{padding:0 22px 20px;color:var(--ink-2)}

.related{margin-top:56px;padding-top:34px;border-top:1px solid var(--line)}
.related h2{font-size:1.35rem;font-weight:800;margin-bottom:20px}

.info-grid{display:grid;gap:20px;grid-template-columns:1fr}
.info-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;box-shadow:var(--shadow)}
.info-card h2{font-size:1.15rem;font-weight:800;margin-bottom:10px}
.info-card p,.info-card address{font-style:normal;color:var(--ink-2);line-height:1.8}
.info-card a{font-weight:600;word-break:break-word}
.dl{display:grid;grid-template-columns:1fr;gap:14px 24px;margin:0}
.dl div{display:grid;gap:2px}
.dl dt{font-size:.85rem;font-weight:700;letter-spacing:.04em;color:var(--muted)}
.dl dd{margin:0;color:var(--ink);font-weight:600;word-break:break-word}

.legal{max-width:78ch}
.legal>*+*{margin-top:20px}
.legal h2{font-size:clamp(1.25rem,2.4vw,1.6rem);font-weight:800;margin-top:44px;line-height:1.4}
.legal h3{font-size:1.1rem;font-weight:800;margin-top:26px}
.legal p,.legal li{color:var(--ink)}
.legal ul,.legal ol{padding-left:1.3em}
.legal li+li{margin-top:8px}

.site-footer{background:var(--blue-900);color:#c9d8ff;--focus:#9dc0ff;margin-top:0}
.site-footer a{color:#dbe7ff}
.site-footer a:hover{color:#fff}
.footer__grid{display:grid;grid-template-columns:1fr;gap:34px;padding-block:clamp(44px,6vw,64px)}
.footer__brand{max-width:34ch}
.footer__brand .brand{color:#fff}
.footer__brand p{margin-top:14px;color:#a9c0f0;font-size:.95rem;line-height:1.75}
.footer__col h2{font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;color:#8fa9e0;font-weight:700;margin-bottom:14px}
.footer__col ul{list-style:none;padding:0;margin:0;display:grid;gap:11px}
.footer__col a{text-decoration:none;font-weight:500;font-size:.98rem}
.footer__col a:hover{text-decoration:underline}
.footer__bottom{border-top:1px solid rgba(157,192,255,.22);padding-block:26px 34px;display:grid;gap:14px}
.footer__legal{display:grid;gap:8px;color:#a9c0f0;font-size:.9rem;line-height:1.7}
.footer__legal .name{color:#fff;font-weight:700}
.footer__ids{display:flex;flex-wrap:wrap;gap:6px 22px}
.footer__note{color:#8fa9e0;font-size:.85rem}
.footer__social{display:flex;gap:10px}
.footer__social a{display:grid;place-items:center;width:42px;height:42px;border-radius:12px;background:rgba(157,192,255,.12);border:1px solid rgba(157,192,255,.2)}
.footer__social a:hover{background:rgba(157,192,255,.22)}
.footer__social svg{width:20px;height:20px}

@media (min-width:640px){
.grid--2{grid-template-columns:repeat(2,1fr)}
.grid--3{grid-template-columns:repeat(2,1fr)}
.grid--4{grid-template-columns:repeat(2,1fr)}
.info-grid{grid-template-columns:repeat(2,1fr)}
.dl{grid-template-columns:repeat(2,1fr)}
.footer__grid{grid-template-columns:1.6fr 1fr 1fr}
.footer__bottom{grid-template-columns:1fr auto;align-items:end}
.footer__social{justify-content:flex-end}
}
@media (min-width:900px){
.hero__inner{grid-template-columns:1.15fr .85fr}
.hero__art{width:min(360px,100%)}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}
.privacy-band{grid-template-columns:1fr;text-align:center}
.footer__grid{grid-template-columns:2fr 1fr 1fr 1.2fr}
}
@media (prefers-reduced-motion:reduce){
*{animation-duration:.001ms!important;transition:none!important;scroll-behavior:auto!important}
}