:root{--brand:#1E3A8A;--brand-dark:#0F1E47;--accent:#10B981;--ink-900:#111827;--ink-700:#374151;--ink-600:#6B7280;--ink-200:#E5E7EB;--ink-100:#F3F4F6;--surface:#FFFFFF;--canvas:#F5F7FB;--warn-bg:#FFFBEB;--warn-line:#F59E0B}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic UI","Meiryo",sans-serif;background:var(--surface);color:var(--ink-900);line-height:1.8;-webkit-font-smoothing:antialiased}
a{color:var(--brand)}
.container{max-width:880px;margin:0 auto;padding:0 20px}
header.site{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);border-bottom:1px solid var(--ink-200);backdrop-filter:saturate(1.2) blur(6px)}
header.site .nav{display:flex;align-items:center;justify-content:space-between;height:64px;max-width:1120px;margin:0 auto;padding:0 20px;gap:12px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink-900)}
.logo-icon{width:36px;height:36px;background:var(--brand);border-radius:8px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.logo-name{font-size:20px;font-weight:700}
.nav-links{display:flex;gap:8px;align-items:center}
.nav-links a{font-size:14px;text-decoration:none;padding:8px 12px;border-radius:8px;white-space:nowrap}
.nav-links a.sub{color:var(--ink-700)}
.nav-links a.cta{background:var(--brand);color:#fff;font-weight:700}
@media(max-width:640px){.nav-links a.sub{display:none}}
.crumbs{font-size:13px;color:var(--ink-600);padding:16px 0 0}
.crumbs a{color:var(--ink-600)}
.hero{background:var(--canvas);border-bottom:1px solid var(--ink-200);padding:40px 0 36px}
.kicker{display:inline-block;font-size:12px;font-weight:700;letter-spacing:.08em;color:var(--brand);background:#E0E7FF;padding:4px 10px;border-radius:999px;margin-bottom:14px}
h1{font-size:30px;line-height:1.45;color:var(--brand-dark);margin-bottom:16px}
.lead{font-size:16px;color:var(--ink-700)}
.answer{margin-top:20px;background:#fff;border:1px solid var(--ink-200);border-left:4px solid var(--accent);border-radius:10px;padding:16px 18px;font-size:15px}
.answer strong{color:var(--brand-dark)}
.updated{margin-top:14px;font-size:13px;color:var(--ink-600)}
main section{padding:36px 0;border-bottom:1px solid var(--ink-100)}
h2{font-size:22px;line-height:1.5;color:var(--brand-dark);margin-bottom:16px;padding-left:12px;border-left:4px solid var(--brand)}
h3{font-size:17px;color:var(--ink-900);margin:22px 0 8px}
p{margin:0 0 12px}
ul,ol{margin:0 0 14px 1.4em}
li{margin:4px 0}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:8px 0 14px}
table{width:100%;border-collapse:collapse;font-size:14px}
table.wide{min-width:560px}
th,td{border:1px solid var(--ink-200);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--canvas);color:var(--brand-dark);font-weight:700;white-space:nowrap}
.price{display:flex;flex-wrap:wrap;gap:12px;align-items:baseline;background:var(--brand);color:#fff;border-radius:12px;padding:20px 22px;margin:8px 0 14px}
.price .amount{font-size:30px;font-weight:800;letter-spacing:.01em}
.price .unit{font-size:14px;opacity:.9}
.cards{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin:8px 0 14px}
@media(max-width:640px){.cards{grid-template-columns:1fr}h1{font-size:25px}}
.card{border:1px solid var(--ink-200);border-radius:10px;padding:16px;background:#fff}
.card h3{margin:0 0 6px;font-size:16px;color:var(--brand-dark)}
.card p{font-size:14px;color:var(--ink-700);margin:0}
.steps{counter-reset:s;list-style:none;margin:8px 0 14px}
.steps li{counter-increment:s;position:relative;padding:12px 14px 12px 52px;border:1px solid var(--ink-200);border-radius:10px;margin:8px 0;background:#fff}
.steps li::before{content:counter(s);position:absolute;left:14px;top:12px;width:26px;height:26px;border-radius:50%;background:var(--brand);color:#fff;font-weight:700;font-size:14px;display:flex;align-items:center;justify-content:center}
.steps li strong{display:block;color:var(--brand-dark)}
.note{background:var(--warn-bg);border-left:4px solid var(--warn-line);border-radius:8px;padding:12px 14px;font-size:14px;color:var(--ink-700);margin:12px 0}
.yes,.no{font-weight:700}
.yes{color:#047857}.no{color:#B91C1C}
details{border:1px solid var(--ink-200);border-radius:10px;padding:12px 16px;margin:8px 0;background:#fff}
summary{cursor:pointer;font-weight:700;color:var(--brand-dark)}
details p{margin:10px 0 0;font-size:15px}
.cta-box{background:var(--brand-dark);color:#fff;border-radius:14px;padding:28px 24px;text-align:center;margin:8px 0}
.cta-box p{color:#E5E7EB}
.btn{display:inline-block;background:var(--accent);color:#fff;font-weight:700;text-decoration:none;padding:12px 22px;border-radius:10px;margin:6px 4px}
.btn.ghost{background:transparent;border:1px solid #fff}
.sources{font-size:13px;color:var(--ink-600)}
.sources li{word-break:break-all}
footer.site{background:var(--canvas);border-top:1px solid var(--ink-200);padding:24px 0;font-size:13px;color:var(--ink-600)}
footer.site .links{display:flex;flex-wrap:wrap;gap:14px;margin-top:8px}
footer.site a{color:var(--ink-600)}