:root{
  --accent:#32cd32;
  --bg:#f7fafc;
  --card:#ffffff;
  --text:#0f172a;
  --muted:rgba(15,23,42,.72);
  --border:rgba(15,23,42,.12);
  --shadow: 0 12px 30px rgba(15, 23, 42, .10);
}

*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Noto Sans JP", "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  background:
    radial-gradient(1100px 550px at 15% 0%, rgba(50,205,50,.16), transparent 55%),
    radial-gradient(900px 520px at 90% 12%, rgba(50,205,50,.10), transparent 60%),
    var(--bg);
  color:var(--text);
  line-height:1.65;
}

a{color:inherit}
.container{max-width:980px;margin:0 auto;padding:22px 16px 64px}

.header{
  display:flex;align-items:center;justify-content:space-between;gap:12px;
  padding:14px 16px;border:1px solid var(--border);
  background:rgba(255,255,255,.75);
  backdrop-filter: blur(10px);
  border-radius:18px;
  box-shadow: var(--shadow);
}

.brand{
  font-weight:900;
  letter-spacing:.2px;
  display:flex;
  align-items:center;
  gap:10px;
}
.brand::before{
  content:"";
  width:12px;height:12px;border-radius:999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px rgba(50,205,50,.18);
}

.nav{display:flex;gap:10px;flex-wrap:wrap;justify-content:flex-end}
.nav a{
  text-decoration:none;
  padding:8px 10px;border-radius:12px;
  border:1px solid rgba(15,23,42,.10);
  background:rgba(255,255,255,.65);
}
.nav a:hover{
  border-color: rgba(50,205,50,.55);
  box-shadow: 0 0 0 4px rgba(50,205,50,.12);
}

.hero{padding:26px 6px 10px}
.h1{
  font-size: clamp(28px, 4.2vw, 44px);
  line-height:1.15;
  margin:0 0 14px;
  letter-spacing:-.2px;
}
.h2{
  font-size: clamp(15px, 2.0vw, 18px);
  color:var(--muted);
  margin:0 0 18px;
}

.tagline{
  display:inline-block;
  margin-top:6px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid rgba(50,205,50,.55);
  background:rgba(50,205,50,.10);
  color: rgba(15,23,42,.90);
  font-weight:900;
}

.ctaRow{display:flex;gap:10px;flex-wrap:wrap;margin:18px 0 6px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:12px 14px;border-radius:14px;
  text-decoration:none;font-weight:900;
  border:1px solid rgba(15,23,42,.12);
  background:rgba(255,255,255,.80);
  box-shadow: 0 10px 24px rgba(15, 23, 42, .10);
}
.btnPrimary{
  border-color:rgba(50,205,50,.75);
  background:rgba(50,205,50,.18);
}
.btn:hover{filter:brightness(1.03)}

.grid{
  display:grid;
  grid-template-columns: repeat(12, 1fr);
  gap:14px;
  margin-top:18px;
}

.card{
  grid-column: span 12;
  padding:16px;
  border-radius:18px;
  border:1px solid var(--border);
  background: var(--card);
  box-shadow: var(--shadow);
}
.card h3{margin:0 0 6px;font-size:16px}
.card p{margin:0;color:var(--muted)}

@media(min-width:760px){
  .card.span6{grid-column: span 6;}
  .card.span4{grid-column: span 4;}
}

.footer{
  margin-top:28px;
  padding-top:18px;
  border-top:1px solid rgba(15,23,42,.10);
  color:rgba(15,23,42,.62);
  font-size:13px;
}

.footer a{opacity:.9}
.small{font-size:13px;color:rgba(15,23,42,.68)}
.kv{color:rgba(15,23,42,.92);font-weight:900}