*{box-sizing:border-box;margin:0;padding:0}
body{font-family:Inter,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:#f8fafc;color:#0f172a;line-height:1.6}
a{text-decoration:none;color:inherit}
.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.96);border-bottom:1px solid #e2e8f0}
.nav-inner{max-width:1100px;margin:auto;padding:16px 20px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.logo{font-weight:800;font-size:1.2rem;color:#059669}
.nav-links{display:flex;flex-wrap:wrap;gap:18px}
.nav-links a{color:#334155;font-weight:600;font-size:.95rem}
.nav-links a:hover{color:#059669}
.container{max-width:1100px;margin:auto;padding:24px 20px}
.hero{text-align:center;padding:64px 20px 48px}
.hero h1{font-size:clamp(2.1rem,6vw,3.4rem);line-height:1.1;font-weight:850}
.hero p{color:#64748b;margin:14px auto 0;max-width:650px}
.btn{display:inline-block;background:#059669;color:#fff;padding:12px 18px;border-radius:10px;font-weight:700;margin-top:20px}
.section-title{margin-top:20px;font-size:1.5rem}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:20px}
.card{background:#fff;border:1px solid #e2e8f0;border-radius:16px;padding:22px;box-shadow:0 3px 10px rgba(15,23,42,.03)}
.calc-card{transition:.2s}
.calc-card:hover{transform:translateY(-2px);box-shadow:0 10px 25px rgba(15,23,42,.08);border-color:#a7f3d0}
.card p{color:#64748b;margin-top:7px;font-size:.94rem}
footer{margin-top:70px;border-top:1px solid #e2e8f0;padding:32px 20px;text-align:center;color:#64748b;font-size:.9rem}
.footer-links{display:flex;justify-content:center;flex-wrap:wrap;gap:14px;margin:10px 0}
.page{max-width:800px}
.back{display:inline-block;margin-bottom:12px;color:#475569;font-weight:600}
@media(max-width:850px){.grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.nav-inner{align-items:flex-start;flex-direction:column}.nav-links{gap:10px}.grid{grid-template-columns:1fr}.hero{padding-top:42px}}