:root{--ink:#1f2328;--muted:#5b6470;--line:#e3e6ea;--bg:#fff;--soft:#f5f7f9;--accent:#1d4e89;--accent-ink:#fff;--max:1040px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Noto Sans JP",system-ui,-apple-system,"Segoe UI","Hiragino Sans","Hiragino Kaku Gothic ProN",Meiryo,sans-serif;color:var(--ink);background:var(--bg);line-height:1.8;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--accent)}
img{max-width:100%}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px}
.skip:focus{left:8px;top:8px;background:#fff;padding:8px;z-index:9}
header.site{border-bottom:1px solid var(--line);background:#fff;position:sticky;top:0;z-index:5}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.brand{font-weight:700;text-decoration:none;color:var(--ink);letter-spacing:.02em;font-size:17px;white-space:nowrap}
.brand small{display:block;font-size:11px;font-weight:400;color:var(--muted);line-height:1.2}
nav.main{display:flex;gap:18px;align-items:center}
nav.main a{text-decoration:none;color:var(--ink);font-size:14px}
nav.main a.cta{background:var(--accent);color:var(--accent-ink);padding:8px 14px;border-radius:6px;font-weight:700}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:6px;padding:6px 10px;font-size:14px}
@media(max-width:760px){
  nav.main{display:none;position:absolute;left:0;right:0;top:60px;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;padding:8px 20px 16px;gap:0}
  nav.main a{padding:12px 0;border-bottom:1px solid var(--line)}
  nav.main a.cta{margin-top:12px;text-align:center;border:0}
  nav.main.open{display:flex}
  .menu-btn{display:block}
}
main{display:block}
.hero{padding:64px 0 48px;border-bottom:1px solid var(--line)}
.hero h1{font-size:clamp(28px,5vw,44px);line-height:1.35;margin:0 0 16px;letter-spacing:.01em}
.hero p.lead{font-size:18px;color:var(--muted);margin:0 0 28px;max-width:640px}
.hero .note{display:inline-block;background:var(--soft);border-left:4px solid var(--accent);padding:10px 14px;font-size:14px;margin-top:24px}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:14px 26px;border-radius:6px;font-weight:700;font-size:16px}
.btn.ghost{background:#fff;color:var(--accent);border:2px solid var(--accent)}
.btn+.btn{margin-left:10px}
@media(max-width:480px){.btn{display:block;text-align:center}.btn+.btn{margin:10px 0 0}}
section{padding:56px 0;border-bottom:1px solid var(--line)}
section.soft{background:var(--soft)}
h2{font-size:clamp(22px,3.6vw,30px);line-height:1.4;margin:0 0 24px}
h2 small{display:block;font-size:13px;color:var(--muted);font-weight:400;letter-spacing:.1em}
h3{font-size:19px;margin:28px 0 10px}
p{margin:0 0 14px}
.grid{display:grid;gap:20px}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c2{grid-template-columns:repeat(2,1fr)}
@media(max-width:760px){.grid.c3,.grid.c2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;padding:22px}
.card h3{margin-top:0}
.card .num{font-size:36px;font-weight:700;color:var(--accent);line-height:1;margin-bottom:8px}
table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0 20px;background:#fff}
th,td{border:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
th{background:var(--soft);font-weight:700;white-space:nowrap}
td .price{font-size:22px;font-weight:700;color:var(--accent);white-space:nowrap}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch}
.do-dont{display:grid;grid-template-columns:1fr 1fr;gap:20px}
@media(max-width:760px){.do-dont{grid-template-columns:1fr}}
.do-dont .card h3{font-size:17px;padding-bottom:8px;border-bottom:2px solid var(--accent)}
.do-dont .card.dont h3{border-color:#b23a3a}
.do-dont ul{padding-left:20px;margin:0}
.do-dont li{margin:6px 0}
.warn{background:#fff6f6;border:1px solid #f0c9c9;border-radius:8px;padding:16px 18px;font-size:15px}
.warn strong{color:#b23a3a}
.steps{counter-reset:s;list-style:none;padding:0;margin:0;display:grid;gap:14px}
.steps li{position:relative;padding:16px 18px 16px 64px;background:#fff;border:1px solid var(--line);border-radius:10px}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:18px;top:16px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}
.steps li b{display:block;font-size:17px;margin-bottom:4px}
.cta-band{text-align:center;padding:64px 0}
.cta-band h2{margin-bottom:12px}
.cta-band p{color:var(--muted);margin-bottom:24px}
.small{font-size:13px;color:var(--muted)}
dl.spec{display:grid;grid-template-columns:160px 1fr;gap:0}
dl.spec dt,dl.spec dd{padding:12px 0;border-bottom:1px solid var(--line);margin:0}
dl.spec dt{font-weight:700}
@media(max-width:560px){dl.spec{grid-template-columns:1fr}dl.spec dt{border:0;padding-bottom:0}}
form .f{margin-bottom:18px}
form label{display:block;font-weight:700;margin-bottom:6px;font-size:15px}
form label .req{color:#b23a3a;font-size:12px;margin-left:6px}
form input[type=text],form input[type=email],form input[type=tel],form select,form textarea{width:100%;padding:12px;border:1px solid #c9ced4;border-radius:6px;font:inherit;font-size:16px}
form textarea{min-height:160px}
form button{cursor:pointer;border:0}
.breadcrumb{font-size:13px;color:var(--muted);padding:14px 0 0}
.breadcrumb a{color:var(--muted)}
.page-head{padding:28px 0 36px;border-bottom:1px solid var(--line)}
.page-head h1{font-size:clamp(26px,4.5vw,36px);margin:0 0 8px}
.page-head p{color:var(--muted);margin:0}
footer.site{padding:40px 0 32px;font-size:13px;color:var(--muted)}
footer.site .cols{display:flex;flex-wrap:wrap;gap:24px 40px;justify-content:space-between;align-items:flex-start}
footer.site nav a{color:var(--muted);text-decoration:none;margin-right:16px;display:inline-block;padding:4px 0}
footer.site .addr{line-height:1.7}
footer.site .legal{margin-top:20px;border-top:1px solid var(--line);padding-top:16px}