:root{--text:#111827;--muted:#667085;--border:#e5e7eb;--soft:#f7f8fa;--blue:#2563eb;--blue-dark:#1d4ed8;--blue-soft:#eff6ff;--white:#fff;--green:#15803d}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;color:var(--text);background:var(--white);line-height:1.65}
a{color:var(--blue)}.wrap{width:min(980px,calc(100% - 36px));margin:0 auto}.topbar{border-bottom:1px solid var(--border);background:rgba(255,255,255,.96);position:sticky;top:0;z-index:10}.topbar .wrap{height:66px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{font-weight:800;color:var(--text);text-decoration:none;letter-spacing:-.02em}.brand::after{content:"";display:inline-block;width:7px;height:7px;margin-left:5px;border-radius:50%;background:var(--blue);vertical-align:2px}.nav{display:flex;gap:18px;flex-wrap:wrap}.nav a{font-size:14px;color:#475569;text-decoration:none}.nav a:hover{color:var(--blue)}
.hero{padding:74px 0 44px}.eyebrow{color:var(--blue);font-weight:800;font-size:12px;letter-spacing:.09em;text-transform:uppercase;margin-bottom:13px}.hero h1{font-size:clamp(38px,6vw,62px);line-height:1.04;letter-spacing:-.045em;margin:0 0 20px;max-width:900px}.lead{font-size:20px;color:#475569;max-width:760px;margin:0 0 28px}.cta-row{display:flex;gap:12px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 19px;border-radius:10px;font-weight:750;text-decoration:none;border:1px solid var(--border)}.btn-primary{background:var(--blue);border-color:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark)}.btn-secondary{background:#fff;color:var(--text)}
.stat{margin:26px 0 10px;padding:22px 24px;border:1px solid #bfdbfe;background:var(--blue-soft);border-radius:14px}.stat strong{display:block;font-size:30px;letter-spacing:-.03em;margin-bottom:4px}.stat span{color:#475569}.source-line{font-size:13px;color:var(--muted);margin-top:9px}
main section{padding:30px 0}.content{max-width:780px}.content h2{font-size:30px;line-height:1.18;letter-spacing:-.03em;margin:36px 0 12px}.content h3{font-size:21px;margin:28px 0 8px}.content p{margin:0 0 16px;color:#334155}.content ul{color:#334155;padding-left:22px}.content li{margin:7px 0}.formula{padding:18px 20px;background:var(--soft);border:1px solid var(--border);border-radius:12px;font-weight:700;margin:18px 0}.note{padding:17px 19px;border-left:4px solid var(--blue);background:#f8fafc;margin:22px 0;color:#334155}.cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:16px;margin-top:18px}.card{border:1px solid var(--border);border-radius:14px;padding:22px;text-decoration:none;color:inherit;background:#fff}.card:hover{border-color:#bfdbfe;box-shadow:0 10px 30px rgba(15,23,42,.06)}.card h3{margin:0 0 8px;font-size:20px}.card p{margin:0;color:var(--muted);font-size:14px}.kicker{font-size:13px;font-weight:800;color:var(--blue);text-transform:uppercase;letter-spacing:.07em}.table-wrap{overflow-x:auto;border:1px solid var(--border);border-radius:12px;margin:18px 0}table{border-collapse:collapse;width:100%;min-width:540px}th,td{text-align:left;padding:13px 15px;border-bottom:1px solid var(--border)}th{background:var(--soft);font-size:13px}tr:last-child td{border-bottom:0}
footer{margin-top:54px;border-top:1px solid var(--border);padding:30px 0 46px;color:var(--muted);font-size:13px}.footer-links{display:flex;gap:15px;flex-wrap:wrap;margin-top:12px}.footer-links a{color:#475569}.updated{font-size:13px;color:var(--muted);margin-top:18px}.breadcrumbs{padding-top:20px;font-size:13px;color:var(--muted)}.breadcrumbs a{color:#64748b;text-decoration:none}
@media(max-width:700px){.topbar .wrap{height:auto;padding:16px 0;align-items:flex-start}.nav{gap:10px 14px}.hero{padding:50px 0 30px}.hero h1{font-size:40px}.lead{font-size:18px}.cards{grid-template-columns:1fr}.wrap{width:min(100% - 28px,980px)}}