/* Reuse the same design system as index.css, with subtle variants */
:root{
  --bg:#f7f9ff;--surface:#ffffff;--ink:#0f1a2e;--ink-soft:#445072;--muted:#6b7793;
  --primary:#2b5bff;--primary-700:#1d44d6;--accent:#ff7a3c;--accent-2:#ffb648;
  --line:#e6ecf7;--shadow:0 10px 30px rgba(43,91,255,.10);--radius:14px;--maxw:1140px;
}
*{box-sizing:border-box}html,body{margin:0;padding:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Pretendard","Noto Sans KR","Segoe UI",Roboto,sans-serif;color:var(--ink);background:var(--bg);line-height:1.65}
img{max-width:100%;height:auto;display:block;border-radius:12px}
a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.25;margin:0 0 14px;font-weight:800;letter-spacing:-.02em}
h1{font-size:clamp(26px,4vw,42px)}h2{font-size:clamp(22px,2.8vw,30px)}h3{font-size:17px}
p{margin:0 0 12px;color:var(--ink-soft)}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.center{text-align:center}.muted{color:var(--muted)}
.site-header{position:sticky;top:0;background:rgba(255,255,255,.85);backdrop-filter:saturate(180%) blur(10px);border-bottom:1px solid var(--line);z-index:10}
.nav{display:flex;align-items:center;justify-content:space-between;padding:14px 20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--ink)}
.brand img{border-radius:8px}
.site-header nav a{margin-left:18px;color:var(--ink-soft);font-weight:600}
.site-header nav a.active,.site-header nav a:hover{color:var(--primary)}

.hero{padding:60px 0 40px;background:radial-gradient(1200px 400px at 80% -50px,rgba(43,91,255,.12),transparent 60%),linear-gradient(180deg,#eef3ff,transparent)}
.hero-sm{padding:50px 0 30px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:42px;align-items:center}
.badge{display:inline-block;background:#fff;border:1px solid var(--line);color:var(--primary);font-weight:700;padding:6px 12px;border-radius:999px;font-size:13px;box-shadow:var(--shadow)}
.accent{color:var(--primary)}
.lead{font-size:17px;color:var(--ink-soft);margin:14px 0 22px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.hero-visual img{box-shadow:var(--shadow);border-radius:18px}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 22px;font-weight:700;border-radius:12px;border:1px solid transparent;cursor:pointer;transition:transform .08s ease,background .2s ease;font-size:15px}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:linear-gradient(135deg,var(--primary),#5a82ff);color:#fff;box-shadow:0 8px 20px rgba(43,91,255,.35)}
.btn-primary:hover{background:linear-gradient(135deg,var(--primary-700),var(--primary))}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.lg{padding:16px 28px;font-size:16px}

.section{padding:70px 0}
.section-alt{background:#fff;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}

.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:28px}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow);transition:transform .15s ease}
.card:hover{transform:translateY(-3px)}
.card img{aspect-ratio:16/10;object-fit:cover;margin-bottom:14px}
.card.small{padding:18px 20px}
.card.small h3{margin-bottom:4px}

.steps-list{padding-left:18px;color:var(--ink-soft);margin:0 0 18px}
.steps-list li{margin-bottom:10px}

.usage{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:24px}
.u-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow)}
.u-card span{font-size:36px;display:block;margin-bottom:6px}
.u-card h3{margin:0 0 4px;color:var(--primary)}
.u-card p{font-size:13px;color:var(--muted);margin:0}

.exclusive{display:inline-block;background:linear-gradient(135deg,var(--accent),var(--accent-2));color:#fff;font-size:12px;font-weight:800;padding:4px 10px;border-radius:999px;margin-left:8px;vertical-align:middle}
.table-wrap{overflow-x:auto;background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-top:22px}
.cmp{width:100%;border-collapse:collapse;min-width:640px}
.cmp th,.cmp td{padding:14px 16px;text-align:center;border-bottom:1px solid var(--line);font-size:14px}
.cmp thead th{background:#f3f6ff;color:var(--ink);font-weight:700}
.cmp tr.highlight td{background:#fff7ef;font-weight:600}
.cmp tr:last-child td{border-bottom:0}

.calc{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);margin-top:22px}
.calc-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-bottom:18px}
.calc label{display:flex;flex-direction:column;font-size:13px;font-weight:700;color:var(--ink-soft);gap:6px}
.calc input,.calc select{padding:11px 12px;border:1px solid var(--line);border-radius:10px;font-size:14px;background:#fafbff;color:var(--ink)}
.calc input:focus,.calc select:focus{outline:2px solid var(--primary);border-color:transparent;background:#fff}
.calc-result{margin-top:18px;padding:16px 18px;background:linear-gradient(135deg,#eef3ff,#fff);border:1px dashed var(--primary);border-radius:12px;font-weight:700;color:var(--ink)}

.cta-final{padding:70px 20px;background:linear-gradient(135deg,#1d44d6,#2b5bff 60%,#5a82ff);color:#fff;text-align:center}
.cta-final h2{color:#fff}.cta-final p{color:#dbe5ff;margin-bottom:22px}
.cta-final .btn-primary{background:#fff;color:var(--primary)}
.cta-final .btn-primary:hover{background:#f0f4ff;color:var(--primary-700)}

.site-footer{background:#0f1a2e;color:#9aa6c2;padding:28px 0}
.foot{display:flex;flex-direction:column;gap:6px;text-align:center;font-size:13px}
.foot a{color:#cfd8ff}

@media (max-width:900px){
  .hero-grid{grid-template-columns:1fr}
  .two-col{grid-template-columns:1fr}
  .cards{grid-template-columns:repeat(2,1fr)}
  .usage{grid-template-columns:repeat(2,1fr)}
  .calc-grid{grid-template-columns:1fr}
  .hero{padding:40px 0 20px}
}
@media (max-width:540px){
  .cards{grid-template-columns:1fr}
  .usage{grid-template-columns:1fr}
  .site-header nav a{margin-left:12px;font-size:14px}
}