:root{--c-brand: #00bec8;--c-main: #333333;--c-accent: #007780;--c-warn: #99500c;--c-ink: #333333;--c-bg: #fdfdfd;--c-surface: #ffffff;--c-soft: #f2fafb;--c-muted: #626262;--c-line: #e5e5e5;--c-ended: #666666;--radius: 3px;--font-base: "游ゴシック体", "Yu Gothic", YuGothic, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;--shadow: none;--content: 1000px}*{box-sizing:border-box}body{margin:0;background:var(--c-bg);color:var(--c-ink);font-family:var(--font-base);line-height:1.9}a{color:var(--c-accent);text-underline-offset:3px}a:hover{opacity:.8}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--c-accent);outline-offset:4px}img{max-width:100%;height:auto}.brand-inner{max-width:1200px;margin:auto;padding:0 24px}.operator-strip{background:var(--c-brand);color:#163c3e;font-size:12px;line-height:1.8;padding:3px 0}.site-header{background:#fff;border-bottom:1px solid var(--c-line)}.head{display:flex;align-items:center;justify-content:space-between;min-height:88px;gap:24px}.brand{display:inline-flex;align-items:center;gap:18px;text-decoration:none;color:var(--c-ink)}.brand img{width:192px;height:auto}.brand-section{border-left:1px solid #ddd;padding-left:17px;font-size:17px;font-weight:700;white-space:nowrap}.utility{display:flex;gap:26px}.utility a{font-size:13px;color:var(--c-ink);text-decoration:none}.primary-nav{display:flex;justify-content:center;gap:0;max-width:1200px;margin:auto;padding:0 24px}.primary-nav a{flex:1;text-align:center;padding:18px 10px;font-size:14px;color:var(--c-ink);text-decoration:none;border-bottom:3px solid transparent}.primary-nav a[aria-current=page],.primary-nav a:hover{border-bottom-color:var(--c-brand);color:var(--c-accent)}.mobile-menu{display:none}main{max-width:var(--content);margin:auto;padding:28px 24px 64px;min-height:55vh}.breadcrumbs{margin-bottom:30px}.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:8px;list-style:none;margin:0;padding:0}.breadcrumbs li{font-size:12px;color:var(--c-muted)}.breadcrumbs li+li:before{content:"›";margin-right:8px}.breadcrumbs a{color:var(--c-muted);text-decoration:none}h1{font-size:clamp(1.5rem,3.3vw,2rem);line-height:1.6;color:var(--c-main);margin:8px 0 20px;padding-bottom:16px;border-bottom:1px solid var(--c-line);position:relative}h1:after{content:"";position:absolute;bottom:-1px;left:0;width:160px;height:2px;background:var(--c-brand)}h2{font-size:1.3rem;line-height:1.65;margin:40px 0 24px;padding:14px 20px;background:var(--c-soft);border-left:5px solid var(--c-brand)}h3{font-size:1.15rem}.lead{color:var(--c-muted);font-size:1rem}.button{display:inline-block;background:var(--c-accent);border-radius:var(--radius);color:#fff;padding:12px 24px;font-weight:700;text-decoration:none}.card-grid{display:grid;gap:24px;grid-template-columns:repeat(2,minmax(0,1fr))}.card-grid:has(>:only-child){grid-template-columns:minmax(0,1fr)}.site-footer{background:#f6f6f6;color:var(--c-ink);border-top:1px solid var(--c-line);padding:32px 24px 20px;text-align:center}.footer-inner{max-width:1100px;margin:auto}.footer-nav{display:flex;justify-content:center;flex-wrap:wrap;gap:12px 22px;margin-bottom:26px}.footer-nav a{font-size:13px;color:var(--c-ink);text-decoration:none}.site-footer p{font-size:12px;margin:8px 0}.site-footer .copyright{font-size:11px;margin-top:24px}.skip-link{position:absolute;top:-100px;left:16px;background:#fff;z-index:99;padding:12px}.skip-link:focus{top:8px}@media(max-width:700px){.brand-inner{padding:0 16px}.operator-strip{font-size:10px;line-height:1.6}.head{min-height:74px;gap:10px}.brand{gap:12px}.brand img{width:150px}.brand-section{font-size:14px;padding-left:12px}.utility,.primary-nav{display:none}.mobile-menu{display:block;position:relative}.mobile-menu summary{cursor:pointer;list-style:none;font-size:11px;text-align:center;padding:8px}.mobile-menu summary:before{content:"☰";display:block;font-size:21px;line-height:1.2}.mobile-menu summary::-webkit-details-marker{display:none}.mobile-menu nav{position:absolute;right:0;top:100%;z-index:10;background:#fff;border:1px solid var(--c-line);width:240px;box-shadow:0 5px 12px #0001}.mobile-menu a{display:block;padding:12px 18px;border-bottom:1px solid var(--c-line);font-size:14px;text-decoration:none}main{padding:20px 18px 40px}.breadcrumbs{margin-bottom:22px}h1{font-size:1.5rem}h2{font-size:1.15rem;padding:12px 14px}.card-grid{grid-template-columns:minmax(0,1fr)}}