:root{
  --bg:#f4f7f9; --ink:#0f2e32; --mut:#5c7377; --panel:#fff; --panel2:#e9f2f2;
  --line:#dce6e7; --teal:#00877d; --teal2:#006a62; --accent:#ffd43b;
  --radius:12px; --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--ink);font-family:"Helvetica Neue",Arial,"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic",sans-serif;line-height:1.75}
img{max-width:100%}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

header.site{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hd{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.12rem}
.logo img{border-radius:8px}
.logo .ja{font-weight:400;font-size:.76rem;color:var(--mut);margin-left:6px}
nav.main{display:flex;align-items:center;gap:4px;flex-wrap:wrap}
nav.main a{font-size:.9rem;font-weight:600;color:var(--mut);padding:8px 12px;border-radius:6px}
nav.main a:hover{color:var(--ink);background:var(--panel2)}
nav.main a.active{color:#fff;background:var(--teal)}
nav.main a.btn{background:var(--ink);color:#fff;padding:9px 16px;border-radius:6px}
nav.main a.btn:hover{background:var(--teal2)}
.nav-toggle{display:none;background:none;border:0;color:var(--ink);font-size:1.5rem;cursor:pointer}

.btn{display:inline-block;background:var(--teal);color:#fff;font-weight:700;padding:13px 26px;border-radius:6px;font-size:.95rem;transition:.2s}
.btn:hover{background:var(--teal2)}
.btn.big{font-size:1.05rem;padding:15px 30px}
.btn.ghost{background:#fff;color:var(--teal);border:1.5px solid var(--line)}
.btn.ghost:hover{border-color:var(--teal);background:var(--panel2)}
.link{color:var(--teal2);font-weight:600}
.link:hover{text-decoration:underline}
.note{font-size:.85rem;color:var(--mut);margin-top:16px}

.hero{padding:86px 0 78px;background:linear-gradient(135deg,#e9f3f3,var(--bg) 60%);border-bottom:1px solid var(--line)}
.kicker{display:inline-block;font-size:.74rem;letter-spacing:.2em;color:var(--teal);font-weight:800;margin-bottom:16px}
.hero h1{font-size:clamp(2rem,5vw,3.5rem);line-height:1.22;font-weight:900}
.hero h1 .accent{color:var(--teal)}
.hero .sub{color:var(--mut);margin-top:20px;font-size:1.05rem;max-width:680px}
.hero .cta{margin-top:30px;display:flex;gap:14px;flex-wrap:wrap}

.blk{padding:62px 0;border-bottom:1px solid var(--line)}
.blk.alt{background:#fff}
.blk.cta-band{background:var(--ink);text-align:center}
h2.sec{font-size:clamp(1.4rem,2.8vw,2rem);font-weight:800;margin-bottom:6px}
.sec-sub{color:var(--mut);margin-bottom:28px}
.grid{display:grid;gap:18px}
.g2{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.2s;display:block}
a.card:hover{transform:translateY(-3px);border-color:var(--teal);box-shadow:0 16px 34px rgba(15,46,50,.1)}
.card h3{font-size:1.15rem;margin-bottom:10px;font-weight:800}
.card p{color:var(--mut);font-size:.95rem}
.card.mini{padding:24px;border-top:3px solid var(--teal)}
.card.mini h3{font-size:1.02rem}
.more{color:var(--teal);font-weight:700;display:inline-block;margin-top:14px;font-size:.92rem}

.pagehead{padding:70px 0 54px;background:linear-gradient(180deg,#e9f3f3,var(--bg));border-bottom:1px solid var(--line)}
.pagehead .kicker{color:var(--teal)}
.pagehead h1{font-size:clamp(1.7rem,3.6vw,2.8rem);font-weight:800}
.pagehead .sub{color:var(--mut);margin-top:14px;max-width:720px}

.steps{display:flex;flex-direction:column;gap:14px}
.step{display:flex;gap:16px;align-items:flex-start;background:#fff;border:1px solid var(--line);border-radius:10px;padding:18px 20px}
.step>span{flex:0 0 34px;height:34px;border-radius:6px;background:var(--teal);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800}
.step strong{display:block;margin-bottom:4px}
.step p{color:var(--mut);font-size:.93rem}

.faqlist{max-width:820px;display:flex;flex-direction:column;gap:12px}
.faqlist details{background:#fff;border:1px solid var(--line);border-radius:10px;padding:16px 20px}
.faqlist summary{cursor:pointer;font-weight:700;color:var(--teal2)}
.faqlist .a{color:var(--mut);margin-top:10px;font-size:.95rem}

.cta-band h2{font-size:clamp(1.5rem,3vw,2.2rem);margin-bottom:12px;color:#fff}
.cta-band p{color:#aac4c9;margin-bottom:24px}
.cta-band .btn{background:var(--accent);color:var(--ink)}
.cta-band .btn:hover{background:#ffc61a}

footer.site{background:var(--ink);color:#fff;padding:44px 0}
.ft{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.ft p{color:#9fb8bc;font-size:.85rem;max-width:360px;margin-top:10px}
.ft nav{display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.ft nav a{color:#c5dcdf;font-size:.9rem}
.ft nav a:hover{color:#fff}
.ft nav a.foot-cta{color:var(--accent);font-weight:700}

@media(max-width:880px){
  .nav-toggle{display:block}
  nav.main{position:fixed;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:12px 16px;display:none;border-bottom:1px solid var(--line)}
  nav.main.open{display:flex}
  nav.main a{padding:12px;border-radius:6px}
  .hero{padding:58px 0 54px}
  .g3,.g2{grid-template-columns:1fr}
  .blk{padding:46px 0}
  .ft{flex-direction:column}
  .ft nav{align-items:flex-start}
}