:root{
  --navy:#1E2A44; --ink:#33405C; --sub:#55607A;
  --bg:#F7F6F2; --line:#D9D6CC; --mark:#F2E3A6;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:80px}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:"BIZ UDPGothic","Hiragino Kaku Gothic ProN","Yu Gothic",Meiryo,sans-serif;
  font-size:16px;line-height:1.9;-webkit-text-size-adjust:100%}
a{color:inherit}
img{max-width:100%;height:auto}
:focus-visible{outline:2px solid var(--navy);outline-offset:3px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:16px;top:16px;z-index:100;background:#fff;padding:8px 12px}
.container{width:min(1040px,100% - 48px);margin-inline:auto}
.narrow{width:min(720px,100% - 48px);margin-inline:auto}

.site-header{position:sticky;top:0;z-index:10;background:rgba(247,246,242,.97);border-bottom:1px solid var(--line)}
.site-header .container{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px}
.brand{font-weight:700;letter-spacing:.1em;color:var(--navy);text-decoration:none;font-size:15px;white-space:nowrap}
.gnav{display:flex;gap:22px;font-size:14px}
.gnav a{text-decoration:none;color:var(--sub);white-space:nowrap}
.gnav a:hover{color:var(--navy)}
.gnav a[aria-current="page"]{color:var(--navy);font-weight:700}
.header-actions{display:flex;align-items:center;gap:8px}
.mnav{display:none;position:relative}
.mnav summary{list-style:none;cursor:pointer;min-height:44px;padding:0 14px;display:flex;align-items:center;
  border:1px solid var(--line);border-radius:4px;font-size:14px;color:var(--navy)}
.mnav summary::-webkit-details-marker{display:none}
.mnav nav{position:absolute;right:0;top:52px;background:var(--bg);border:1px solid var(--line);
  min-width:200px;padding:8px 0}
.mnav nav a{display:block;padding:12px 20px;text-decoration:none;color:var(--navy)}
.mnav nav a[aria-current="page"]{font-weight:700;background:rgba(30,42,68,.05)}

.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 28px;
  border-radius:4px;border:1px solid var(--navy);background:var(--navy);color:var(--bg);
  text-decoration:none;font-weight:700;font-size:15px;font-family:inherit;cursor:pointer;transition:background .2s}
.btn:hover{background:#33405C}
.btn--ghost{background:transparent;color:var(--navy)}
.btn--ghost:hover{background:rgba(30,42,68,.06)}
.btn--sm{min-height:44px;padding:0 16px;font-size:14px}
.btn--light{background:var(--bg);color:var(--navy);border-color:var(--bg)}
.btn--light:hover{background:#fff}

.kicker{font-size:12px;letter-spacing:.12em;color:var(--sub);margin:0 0 8px}
h1,h2,h3{color:var(--navy);line-height:1.45;margin:0}
h1{font-size:clamp(32px,5vw,48px);font-weight:700}
h2{font-size:clamp(24px,3.2vw,32px);font-weight:700;margin-bottom:16px}
h3{font-size:18px;font-weight:700}
.mk{background:linear-gradient(transparent 55%,var(--mark) 55%);padding:0 2px}
.lead{font-size:17px;margin:0 0 8px}
.small{font-size:13px;color:var(--sub)}
.textlink{font-weight:700;color:var(--navy)}

.section{padding:88px 0}
.section--line{border-top:1px solid var(--line)}
.section--navy{background:var(--navy);color:#E8EBF2}
.section--navy h2,.section--navy h3{color:#fff}
.section--navy .kicker{color:#AEB8D0}
.section--navy .small{color:#AEB8D0}
.section--navy .steps li{border-color:rgba(255,255,255,.2)}
.section--navy .steps li::before{color:#fff}

.hero{padding:72px 0 56px}
.hero--page{padding-top:32px}
.hero__grid{display:grid;grid-template-columns:1fr 340px;gap:56px;align-items:center}
.hero__img img{display:block;width:100%;aspect-ratio:2/3;object-fit:cover;border-radius:4px}
.hero__cta{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}

.breadcrumb{padding-top:24px;font-size:13px;color:var(--sub)}
.breadcrumb ol{list-style:none;margin:0;padding:0;display:flex;flex-wrap:wrap;gap:4px}
.breadcrumb li+li::before{content:"›";margin-right:6px}
.breadcrumb a{color:var(--sub)}

.photo{margin:28px 0}
.photo img{display:block;width:100%;aspect-ratio:3/2;object-fit:cover;border-radius:4px}

.facts{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);
  border-block:1px solid var(--line);margin:0}
.facts div{background:var(--bg);padding:18px 20px}
.facts dt{font-size:12px;color:var(--sub);margin:0}
.facts dd{margin:2px 0 0;font-size:18px;font-weight:700;color:var(--navy);line-height:1.5}

.qa{border-top:1px solid var(--line);padding:20px 0}
.qa:last-of-type{border-bottom:1px solid var(--line)}
.qa h3{margin:0 0 6px}
.qa p{margin:0}
.qa p+p{margin-top:8px}

.steps{list-style:none;padding:0;margin:0;counter-reset:s}
.steps li{counter-increment:s;display:grid;grid-template-columns:48px 1fr;gap:4px 16px;
  padding:20px 0;border-top:1px solid var(--line)}
.steps li::before{content:counter(s,decimal-leading-zero);grid-row:span 2;font-size:26px;font-weight:700;color:var(--navy);line-height:1.3}
.steps p{margin:0}
.steps .step-img{grid-column:1/-1;justify-self:center;display:block;width:100%;max-width:480px;
  aspect-ratio:3/2;object-fit:cover;margin-top:16px;border-radius:4px}

.spec{display:grid;grid-template-columns:160px 1fr;margin:0;border-top:1px solid var(--line)}
.spec dt,.spec dd{padding:16px 0;border-bottom:1px solid var(--line);margin:0}
.spec dt{font-weight:700;color:var(--navy);padding-right:16px}

.list{margin:0;padding:0;list-style:none;border-top:1px solid var(--line)}
.list li{position:relative;padding:14px 0 14px 20px;border-bottom:1px solid var(--line)}
.list li::before{content:"";position:absolute;left:2px;top:27px;width:8px;height:2px;background:var(--navy)}

/* フォーム */
.form{margin-top:32px}
.field{margin-bottom:24px}
.field>label{display:block;font-weight:700;color:var(--navy);margin-bottom:6px}
.req{display:inline-block;margin-left:8px;padding:0 6px;font-size:11px;line-height:1.7;background:var(--navy);
  color:#fff;border-radius:2px;vertical-align:2px;font-weight:700}
.input,.textarea{width:100%;font:inherit;font-size:16px;color:var(--ink);background:#fff;
  border:1px solid var(--line);border-radius:4px;padding:12px 14px}
.textarea{min-height:200px;resize:vertical;line-height:1.7}
.input:focus,.textarea:focus{outline:2px solid var(--navy);outline-offset:1px;border-color:var(--navy)}
.field>.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;color:var(--ink);cursor:pointer}
.check input{width:20px;height:20px;margin:5px 0 0;flex:none;accent-color:var(--navy)}
.check a{color:var(--navy);font-weight:700}
.form-error{border:1px solid #B5463C;background:#FBEFEC;color:#7A2A22;padding:14px 18px;border-radius:4px;margin:0 0 24px}
.form-error ul{margin:0;padding-left:1.2em}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}
.note{background:#fff;border:1px solid var(--line);border-radius:4px;padding:16px 20px;font-size:14px}

/* プライバシーポリシー */
.policy h2{font-size:20px;margin:48px 0 12px}
.policy h2:first-child{margin-top:0}
.policy p{margin:0 0 12px}
.policy ul{margin:0 0 12px;padding-left:1.4em}
.policy li{margin-bottom:4px}
.policy a{color:var(--navy);font-weight:700}

.site-footer{background:var(--navy);color:#C9D0E0;padding:56px 0 40px;font-size:14px}
.site-footer a{color:#E8EBF2}
.footer-nav{display:flex;flex-wrap:wrap;gap:8px 24px;margin:20px 0}
.site-footer .small{color:#9AA6C2;margin:8px 0 0}

@media (max-width:1000px){
  .gnav{display:none}
  .mnav{display:block}
}
@media (max-width:860px){
  .facts{grid-template-columns:1fr 1fr}
  .section{padding:64px 0}
  .hero{padding:48px 0 40px}
  .hero--page{padding-top:24px}
  .hero__grid{grid-template-columns:1fr;gap:32px}
  .hero__img{justify-self:center;width:100%;max-width:260px}
  .hero__cta .btn,.btn-row .btn{width:100%}
  .spec{grid-template-columns:1fr}
  .spec dt{padding-bottom:0;border-bottom:0}
}
@media (max-width:400px){
  .header-actions .btn--sm{display:none}
}
@media (prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}