:root{
  --bg:#f4f7fb;
  --text:#142033;
  --muted:#5c6675;
  --accent:#0f766e;
  --accent-dark:#0b4f4a;
  --card:#ffffff;
  --line:#dbe3ee;
  --radius:18px;
  --shadow:0 10px 30px rgba(15,35,60,.08);
  --max:1180px;
}
*{box-sizing:border-box}
body{
  margin:0;
  font-family:Inter,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.7;
}
a{color:var(--accent-dark);text-decoration:none}
.container{width:min(var(--max),92%);margin:auto}
.site-header{
  position:sticky;
  top:0;
  background:rgba(255,255,255,.94);
  border-bottom:1px solid var(--line);
  z-index:100;
}
.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px;
  padding:16px 0;
}
.brand{
  display:flex;
  align-items:center;
  gap:14px;
  font-weight:800;
}
.brand-mark{
  width:44px;
  height:44px;
  border-radius:12px;
  background:linear-gradient(135deg,var(--accent),var(--accent-dark));
  color:#fff;
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight:800;
}
.main-nav{
  display:flex;
  gap:20px;
  flex-wrap:wrap;
}
.main-nav a{font-weight:700}
.hero{
  padding:90px 0 70px;
  background:
  linear-gradient(rgba(255,255,255,.84),rgba(255,255,255,.92)),
  radial-gradient(circle at top right,#d8f3ef 0%,transparent 35%);
}
.hero-grid{
  display:grid;
  grid-template-columns:1.2fr .8fr;
  gap:40px;
  align-items:center;
}
.hero h1{
  font-size:3.2rem;
  line-height:1.08;
  margin:0 0 20px;
}
.lead{
  font-size:1.16rem;
  color:var(--muted);
}
.tag{
  display:inline-block;
  padding:8px 12px;
  border-radius:999px;
  background:#e6f6f2;
  color:var(--accent-dark);
  font-weight:700;
  margin:0 10px 10px 0;
}
.btn-row{
  display:flex;
  gap:16px;
  flex-wrap:wrap;
  margin-top:28px;
}
.btn{
  padding:15px 22px;
  border-radius:14px;
  font-weight:800;
  display:inline-flex;
  align-items:center;
}
.btn-primary{
  background:var(--accent);
  color:#fff;
}
.btn-secondary{
  background:#fff;
  border:1px solid var(--line);
}
.hero-card,.card,.article{
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.hero-card{
  padding:28px;
}
.section{
  padding:72px 0;
}
.section-title h2{
  font-size:2.2rem;
  margin-bottom:10px;
}
.grid-3{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.card{
  padding:28px;
}
.article{
  padding:42px;
}
.notice{
  background:#eef8f7;
  border-left:4px solid var(--accent);
  border-radius:14px;
  padding:18px;
}
.faq details{
  background:#fff;
  border:1px solid var(--line);
  border-radius:14px;
  padding:20px;
  margin-bottom:14px;
}
.faq summary{
  font-weight:800;
  cursor:pointer;
}
.footer{
  background:#fff;
  border-top:1px solid var(--line);
  padding:40px 0;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:30px;
}
.small{
  color:var(--muted);
  font-size:.95rem;
}
@media(max-width:900px){
  .hero-grid,.grid-3,.footer-grid{
    grid-template-columns:1fr;
  }
  .hero h1{
    font-size:2.3rem;
  }
}
@media(max-width:640px){
  .hero{
    padding:70px 0 50px;
  }
  .hero h1{
    font-size:2rem;
  }
  .lead{
    font-size:1.08rem;
  }
  .article{
    padding:24px;
  }
}