:root{--c-bg:#ffffff;--c-bg-soft:#f4f7fa;--c-bg-accent:#e9f4f3;--c-text:#1b2733;--c-muted:#5a6b7b;--c-line:#dde4ea;--c-brand:#0f3b5f;--c-brand-2:#14857a;--c-link:#0b5cad;--c-warn-bg:#fff7e6;--c-warn-line:#f0c36d;--radius:12px;--wrap:1080px;--shadow:0 1px 2px rgba(16,40,64,.06),0 4px 16px rgba(16,40,64,.06)}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--c-bg);color:var(--c-text);font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Hiragino Kaku Gothic ProN","Noto Sans JP","Yu Gothic UI","Meiryo",sans-serif;font-size:16px;line-height:1.85;letter-spacing:.02em;word-break:normal;overflow-wrap:anywhere}
img,svg{max-width:100%;height:auto}
a{color:var(--c-link)}
a:hover{text-decoration-thickness:2px}
:focus-visible{outline:3px solid var(--c-brand-2);outline-offset:2px}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 16px}
.skip{position:absolute;left:-9999px}.skip:focus{left:8px;top:8px;background:#fff;padding:8px 12px;z-index:100}
/* header */
.site-header{background:#fff;border-bottom:1px solid var(--c-line);position:sticky;top:0;z-index:50}
.header-inner{display:flex;align-items:center;justify-content:space-between;min-height:60px;gap:12px}
.logo{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:1.15rem;color:var(--c-brand);text-decoration:none;letter-spacing:0}
.logo span:last-child{color:var(--c-brand-2);margin-left:2px}
.logo-mark{width:26px;height:26px;border-radius:7px;background:linear-gradient(135deg,var(--c-brand),var(--c-brand-2));position:relative}
.logo-mark::after{content:"";position:absolute;left:10px;top:7px;border-left:9px solid #fff;border-top:6px solid transparent;border-bottom:6px solid transparent}
.nav-toggle{display:none;border:1px solid var(--c-line);background:#fff;border-radius:8px;padding:6px 12px;font:inherit;font-size:.9rem;color:var(--c-text);cursor:pointer}
.site-nav ul{display:flex;gap:4px;list-style:none;margin:0;padding:0}
.site-nav a{display:block;padding:8px 10px;border-radius:8px;color:var(--c-text);text-decoration:none;font-size:.92rem;font-weight:600}
.site-nav a:hover,.site-nav a[aria-current=page]{background:var(--c-bg-soft);color:var(--c-brand)}
@media (max-width:820px){.nav-toggle{display:block}.site-nav{display:none;position:absolute;left:0;right:0;top:60px;background:#fff;border-bottom:1px solid var(--c-line);box-shadow:var(--shadow)}.site-nav.open{display:block}.site-nav ul{flex-direction:column;padding:8px 16px 16px}.site-nav a{padding:12px 8px;border-bottom:1px solid var(--c-bg-soft)}}
/* common */
.breadcrumb ol{list-style:none;margin:14px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:4px;font-size:.8rem;color:var(--c-muted)}
.breadcrumb li+li::before{content:"›";margin:0 6px;color:#9aa8b5}
.breadcrumb a{color:var(--c-muted)}
.pr-bar{margin:12px 0 0;font-size:.78rem;color:var(--c-muted);background:var(--c-bg-soft);border-radius:8px;padding:6px 12px}
.pr-bar a{margin-left:.5em}
.dates{margin:8px 0 0;font-size:.8rem;color:var(--c-muted)}
.article .content{max-width:760px;margin:0 auto;padding:8px 16px 56px}
h1,h2,h3{line-height:1.45;letter-spacing:.01em}
.content h1{font-size:clamp(1.55rem,4.6vw,2.1rem);margin:20px 0 12px;color:var(--c-brand)}
.lead{font-size:1.05rem;color:#2d3d4c}
.content h2{font-size:clamp(1.25rem,3.6vw,1.5rem);margin:48px 0 14px;padding:0 0 8px;border-bottom:2px solid var(--c-brand-2)}
.content h3{font-size:1.12rem;margin:32px 0 8px;padding-left:10px;border-left:4px solid var(--c-brand)}
.content p,.content ul,.content ol{margin:0 0 1.1em}
.content li{margin-bottom:.35em}
.toc{background:var(--c-bg-soft);border-radius:var(--radius);padding:16px 20px;margin:24px 0}
.toc p{font-weight:700;margin:0 0 6px}
.toc ol{margin:0;padding-left:1.3em;font-size:.95rem}
.notice{background:var(--c-warn-bg);border:1px solid var(--c-warn-line);border-radius:var(--radius);padding:14px 18px;margin:20px 0}
.notice p:last-child{margin-bottom:0}
.point{background:var(--c-bg-accent);border-radius:var(--radius);padding:14px 18px;margin:20px 0}
.point p:last-child,.point ul:last-child{margin-bottom:0}
.table-scroll{overflow-x:auto;margin:16px 0 24px;-webkit-overflow-scrolling:touch}
table{border-collapse:collapse;width:100%;font-size:.92rem;background:#fff}
th,td{border:1px solid var(--c-line);padding:10px 12px;text-align:left;vertical-align:top}
thead th{background:var(--c-brand);color:#fff;white-space:nowrap}
tbody th{background:var(--c-bg-soft);white-space:nowrap}
.compare{min-width:640px}
.info-table th{width:9em}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;min-height:48px;padding:10px 22px;border-radius:999px;font-weight:700;text-decoration:none;font-size:1rem;line-height:1.4;text-align:center}
.btn-primary{background:var(--c-brand-2);color:#fff}
.btn-primary:hover{background:#0f6d64}
.btn-ghost{border:2px solid var(--c-brand);color:var(--c-brand);background:#fff}
.btn-ghost:hover{background:var(--c-bg-soft)}
.ext{font-size:.85em}
.cta-box{border:2px solid var(--c-brand-2);border-radius:16px;padding:22px 20px;margin:36px 0;text-align:center;background:#fff}
.cta-box h2,.cta-box .cta-title{border:0;margin:0 0 8px;padding:0;font-size:1.2rem;font-weight:800;color:var(--c-brand)}
.cta-box p{font-size:.93rem;color:var(--c-muted)}
.cta-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:12px}
.cta-note{font-size:.78rem!important;margin:12px 0 0!important}
.pros-cons{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:16px 0 24px}
.pros-cons>div{border:1px solid var(--c-line);border-radius:var(--radius);padding:14px 16px}
.pros-cons h3{margin-top:0;border:0;padding:0;font-size:1rem}
.pros-cons ul{margin:0;padding-left:1.2em;font-size:.94rem}
.pros h3{color:var(--c-brand-2)}.cons h3{color:#a5521b}
@media (max-width:640px){.pros-cons{grid-template-columns:1fr}}
.steps{counter-reset:s;list-style:none;padding:0}
.steps li{counter-increment:s;position:relative;padding:0 0 14px 44px}
.steps li::before{content:counter(s);position:absolute;left:0;top:2px;width:30px;height:30px;border-radius:50%;background:var(--c-brand);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center;font-size:.9rem}
details.faq{border:1px solid var(--c-line);border-radius:10px;padding:0 16px;margin:0 0 10px}
details.faq summary{cursor:pointer;font-weight:700;padding:14px 0;list-style-position:outside}
details.faq[open] summary{border-bottom:1px solid var(--c-line);margin-bottom:10px}
.related{display:grid;gap:10px;padding:0;list-style:none}
.related a{display:block;border:1px solid var(--c-line);border-radius:10px;padding:12px 16px;text-decoration:none;font-weight:700}
.related a:hover{border-color:var(--c-brand-2);background:var(--c-bg-soft)}
.related small{display:block;font-weight:400;color:var(--c-muted)}
.source{font-size:.82rem;color:var(--c-muted)}
/* home / landing */
.hero{background:linear-gradient(160deg,#0f3b5f 0%,#13566d 60%,#14857a 100%);color:#fff;padding:56px 0 60px}
.hero h1{font-size:clamp(1.7rem,5.4vw,2.6rem);margin:0 0 16px;line-height:1.35}
.hero p{max-width:640px;color:#dceaf2;margin:0 0 24px}
.hero .eyebrow{font-size:.85rem;font-weight:700;letter-spacing:.08em;color:#9fe3d8;margin-bottom:10px}
.hero .btn-ghost{background:transparent;color:#fff;border-color:#fff}
.hero .btn-ghost:hover{background:rgba(255,255,255,.1)}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.section{padding:56px 0}
.section-soft{background:var(--c-bg-soft)}
.section h2{font-size:clamp(1.3rem,4vw,1.7rem);margin:0 0 8px;color:var(--c-brand)}
.section .sub{color:var(--c-muted);margin:0 0 28px}
.cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px}
.card{background:#fff;border:1px solid var(--c-line);border-radius:16px;padding:22px 20px;box-shadow:var(--shadow);display:flex;flex-direction:column}
.card h3{margin:6px 0 8px;font-size:1.2rem}
.card h3 a{color:var(--c-brand);text-decoration:none}
.card p{margin:0 0 14px;font-size:.94rem;color:#3b4b5a}
.card ul{margin:0 0 16px;padding-left:1.2em;font-size:.9rem;color:#3b4b5a}
.card .more{margin-top:auto;font-weight:700;text-decoration:none}
.tag{display:inline-block;font-size:.75rem;font-weight:700;color:var(--c-brand-2);background:var(--c-bg-accent);border-radius:999px;padding:2px 10px}
.goal-list{display:grid;gap:12px;list-style:none;padding:0;margin:0}
.goal-list a{display:flex;justify-content:space-between;gap:12px;align-items:center;background:#fff;border:1px solid var(--c-line);border-radius:12px;padding:16px 18px;text-decoration:none;color:var(--c-text)}
.goal-list a:hover{border-color:var(--c-brand-2)}
.goal-list strong{display:block;color:var(--c-brand)}
.goal-list span.arrow{color:var(--c-brand-2);font-weight:700;white-space:nowrap}
.policy-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.policy-grid div{border-left:4px solid var(--c-brand-2);padding:4px 0 4px 14px}
.policy-grid h3{margin:0 0 4px;font-size:1rem}
.policy-grid p{margin:0;font-size:.9rem;color:var(--c-muted)}
.service-band{background:var(--c-brand);color:#fff;border-radius:18px;padding:32px 24px;display:grid;gap:12px}
.service-band h2{color:#fff}
.service-band p{color:#d5e3ee;margin:0}
.service-band .btn{justify-self:start;background:#fff;color:var(--c-brand)}
/* 404 */
.notfound{text-align:center;padding:72px 16px}
.notfound h1{color:var(--c-brand)}
/* footer */
.site-footer{background:#0d2537;color:#c5d3de;padding:40px 0 24px;font-size:.9rem}
.site-footer a{color:#e3edf4;text-decoration:none}
.site-footer a:hover{text-decoration:underline}
.logo-footer{color:#fff}
.footer-brand p{margin:8px 0 24px;color:#9fb2c2;font-size:.85rem}
.footer-cols{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:20px}
.footer-h{font-size:.85rem;color:#8fb8c9;margin:0 0 8px;letter-spacing:.05em}
.footer-cols ul{list-style:none;margin:0;padding:0}
.footer-cols li{margin:0 0 6px}
.copy{border-top:1px solid #23415a;margin:28px 0 0;padding-top:16px;font-size:.78rem;color:#8ea2b3}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}}
.article>.wrap{max-width:792px}
@media (max-width:640px){.goal-list a{flex-direction:column;align-items:flex-start;gap:6px}}