:root{--green:#16a34a;--deep:#064e3b;--mint:#ecfdf5;--line:#d1fae5;--text:#102018;--muted:#52645b;--gold:#f59e0b;--blue:#2563eb}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--text);background:#fff}a{color:inherit;text-decoration:none}.wrap{max-width:1160px;margin:auto;padding-left:20px;padding-right:20px}.site-header{background:radial-gradient(circle at 75% 15%,#bbf7d0 0,transparent 28%),linear-gradient(135deg,#fff 0,#f0fdf4 60%,#dcfce7 100%);border-bottom:1px solid var(--line)}.nav{height:72px;display:flex;align-items:center;justify-content:space-between;gap:18px}.brand{font-weight:850;color:var(--deep);letter-spacing:.3px}.nav-links{display:flex;align-items:center;gap:18px;font-size:14px;color:#285242}.nav-cta{background:#fff;border:1px solid var(--line);padding:9px 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.badge.internal{background:#fee2e2;color:#991b1b}
.energy-tool{margin-top:18px}.mini-form{display:grid;grid-template-columns:1.3fr 1fr auto;gap:10px;align-items:end}.mini-form select,.mini-form input{margin-top:0}.energy-result{font-weight:800;color:#14532d}@media(max-width:900px){.mini-form{grid-template-columns:1fr}}
.formula-box{margin-top:18px;background:#052e16;color:#dcfce7;border-radius:22px;padding:22px}.formula-box h3{color:#fff}.formula-box p{line-height:1.8}.formula-box strong{color:#fff;font-size:22px}
/* Compact homepage refresh */
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