:root{
  --ink:#17222e; --ink2:#3c4a57; --mut:#68737d; --line:#dde3e8;
  --bg:#ffffff; --bg2:#f4f6f7; --acc:#0f5257; --acc2:#b3852f;
  --radius:14px; --max:1080px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:var(--bg);
  font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic UI","Yu Gothic",Meiryo,"Noto Sans JP",sans-serif;
  line-height:1.85;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:var(--acc);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
h1,h2,h3{line-height:1.45;margin:0 0 .6em}
h2{font-size:1.65rem;letter-spacing:.02em}
h3{font-size:1.12rem}
p{margin:0 0 1em}
.eyebrow{font-size:.78rem;letter-spacing:.22em;color:var(--acc);font-weight:700;text-transform:uppercase;margin-bottom:.4rem}
.lead{font-size:1.06rem;color:var(--ink2)}
.small{font-size:.9rem;color:var(--mut)}
section{padding:64px 0}
section.alt{background:var(--bg2)}

/* header */
header.site{position:sticky;top:0;background:rgba(255,255,255,.96);backdrop-filter:blur(6px);border-bottom:1px solid var(--line);z-index:50}
.nav{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:64px}
.logo{font-weight:800;font-size:1.12rem;color:var(--ink);letter-spacing:.04em;white-space:nowrap}
.logo small{display:block;font-size:.68rem;font-weight:600;color:var(--mut);letter-spacing:.18em}
nav.main{display:flex;gap:26px;align-items:center}
nav.main a{color:var(--ink2);font-size:.95rem;font-weight:600;white-space:nowrap}
nav.main a:hover{color:var(--acc);text-decoration:none}
nav.main a.cta{background:var(--acc);color:#fff;padding:8px 16px;border-radius:999px}
nav.main a.cta:hover{background:#0b3f43;color:#fff}
#navtoggle{display:none}
.burger{display:none;cursor:pointer;padding:10px}
.burger span{display:block;width:24px;height:2px;background:var(--ink);margin:5px 0}
@media(max-width:820px){
  .burger{display:block}
  nav.main{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;align-items:stretch;padding:10px 20px 18px;border-bottom:1px solid var(--line);gap:0}
  nav.main a{padding:11px 4px;border-bottom:1px solid var(--bg2)}
  nav.main a.cta{margin-top:10px;text-align:center;border-bottom:none}
  #navtoggle:checked ~ nav.main{display:flex}
}

/* hero */
.hero{padding:84px 0 70px;background:linear-gradient(180deg,#eef3f3, #fff)}
.hero h1{font-size:2.35rem;letter-spacing:.03em;margin-bottom:.5em}
.hero .lead{max-width:760px}
.hero-img{margin-top:38px;border-radius:var(--radius);overflow:hidden}
.hero-img img{width:100%;height:auto}
@media(max-width:640px){.hero h1{font-size:1.7rem}.hero{padding:56px 0 48px}}

/* cards / grids */
.grid{display:grid;gap:20px}
.grid.c2{grid-template-columns:1fr 1fr}
.grid.c3{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.grid.c2,.grid.c3{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px}
.card h3{margin-bottom:.4em}
.card .tag{display:inline-block;font-size:.75rem;font-weight:700;color:var(--acc);border:1px solid var(--acc);border-radius:999px;padding:2px 10px;margin-bottom:12px}
.card .more{font-weight:700}
.btn{display:inline-block;background:var(--acc);color:#fff;padding:12px 26px;border-radius:999px;font-weight:700}
.btn:hover{background:#0b3f43;text-decoration:none}
.btn.ghost{background:#fff;color:var(--acc);border:1px solid var(--acc)}
.btn.ghost:hover{background:#eef3f3}
.btnrow{display:flex;gap:12px;flex-wrap:wrap;margin-top:18px}

/* steps */
.steps{counter-reset:step;display:grid;gap:14px}
.step{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px 20px}
.step .n{flex:0 0 auto;width:38px;height:38px;border-radius:50%;background:var(--acc);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center}
.step h3{margin:2px 0 2px;font-size:1.02rem}
.step p{margin:0;color:var(--ink2);font-size:.95rem}

/* tables */
table.spec{width:100%;border-collapse:collapse;background:#fff}
table.spec th,table.spec td{border:1px solid var(--line);padding:12px 16px;text-align:left;vertical-align:top;font-size:.97rem}
table.spec th{background:var(--bg2);width:180px;font-weight:700}
@media(max-width:640px){table.spec th{width:110px}}

/* lists */
ul.check{list-style:none;padding:0;margin:0 0 1em}
ul.check li{padding-left:1.5em;position:relative;margin-bottom:.45em}
ul.check li::before{content:"—";position:absolute;left:0;color:var(--acc);font-weight:700}
.note{background:#fdf8ec;border:1px solid #eadfbe;border-radius:var(--radius);padding:18px 20px;font-size:.95rem}

/* form */
form.contact{display:grid;gap:16px;max-width:720px}
form.contact label{font-weight:700;font-size:.95rem;display:block}
form.contact .req{color:#b03a2e;font-size:.8rem;margin-left:6px}
form.contact input,form.contact select,form.contact textarea{
  width:100%;margin-top:6px;padding:12px 14px;border:1px solid var(--line);border-radius:10px;
  font:inherit;background:#fff;color:var(--ink)}
form.contact textarea{min-height:150px;resize:vertical}
form.contact button{background:var(--acc);color:#fff;border:none;padding:14px 34px;border-radius:999px;font:inherit;font-weight:700;cursor:pointer;justify-self:start}
form.contact button:hover{background:#0b3f43}
.formmsg{padding:14px 18px;border-radius:10px;display:none}
.formmsg.ok{display:block;background:#eaf5ee;border:1px solid #bfe0cc}
.formmsg.ng{display:block;background:#fbeeee;border:1px solid #efc4c4}
.hp{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}

/* footer */
footer.site{background:var(--ink);color:#cfd8de;padding:52px 0 34px;margin-top:0}
footer.site a{color:#e8eef2}
footer.site .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:26px}
@media(max-width:820px){footer.site .cols{grid-template-columns:1fr}}
footer.site h4{color:#fff;margin:0 0 .6em;font-size:1rem}
footer.site ul{list-style:none;padding:0;margin:0}
footer.site li{margin-bottom:.35em}
footer.site .fine{border-top:1px solid #33404c;margin-top:30px;padding-top:18px;font-size:.82rem;color:#93a3ad;display:flex;gap:18px;flex-wrap:wrap;justify-content:space-between}