:root{
  --bg:#f6fbfa; --card:#ffffff; --ink:#18323a; --muted:#5b7279; --line:#dbe9e6;
  --accent:#1f9d8b; --accent-2:#e8f6f3; --warn:#c2410c; --warn-bg:#fff4ec; --ok:#15803d; --ok-bg:#ecfdf3;
  --radius:16px;
}
*{box-sizing:border-box}
html,body{margin:0}
body{background:var(--bg);color:var(--ink);font-family:system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.6}
a{color:var(--accent)}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.top{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}
header.top .wrap{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:14px;padding-bottom:14px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.15rem;color:var(--ink);text-decoration:none}
.brand svg{width:34px;height:34px}
nav.menu{display:flex;gap:18px;flex-wrap:wrap}
nav.menu a{color:var(--muted);text-decoration:none;font-weight:600;font-size:.95rem}
nav.menu a:hover,nav.menu a[aria-current="page"]{color:var(--accent)}
.hero{padding:56px 0 36px}
.hero h1{font-size:clamp(1.8rem,4.6vw,2.7rem);line-height:1.15;margin:0 0 14px;letter-spacing:-.02em}
.hero p.lead{font-size:1.1rem;color:var(--muted);max-width:640px;margin:0 0 22px}
.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;font-weight:700;padding:12px 20px;border-radius:999px}
.btn.ghost{background:transparent;color:var(--accent);border:2px solid var(--accent);margin-left:8px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;margin:8px 0 40px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px}
.card h3{margin:0 0 6px;font-size:1.08rem}
.card p{margin:0;color:var(--muted);font-size:.96rem}
.card .ico{font-size:1.6rem;margin-bottom:6px}
section.block{padding:8px 0 36px}
section.block h2{font-size:1.5rem;margin:0 0 14px}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;border-radius:var(--radius)}
table{width:100%;min-width:420px;border-collapse:collapse;background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;font-size:.97rem}
th,td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--line)}
th{background:var(--accent-2);font-weight:700}
td:not(:first-child),th:not(:first-child){white-space:nowrap}
tr:last-child td{border-bottom:none}
.note{background:var(--warn-bg);border:1px solid #fed7aa;color:#7c2d12;border-radius:12px;padding:14px 16px;font-size:.95rem;margin:18px 0}
.tip{background:var(--ok-bg);border:1px solid #bbf7d0;color:#14532d;border-radius:12px;padding:14px 16px;font-size:.95rem;margin:18px 0}
ol.steps{padding-left:22px}
ol.steps li{margin:0 0 10px}
.article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;margin:28px 0 40px}
.article h1{margin-top:0;font-size:clamp(1.6rem,4vw,2.2rem);line-height:1.2}
.meta{color:var(--muted);font-size:.9rem;margin:-6px 0 18px}
.calc{display:grid;grid-template-columns:1fr auto;gap:10px;align-items:end;max-width:460px}
.calc label{display:block;font-weight:600;margin-bottom:6px}
.calc input{width:100%;padding:11px 12px;border:1px solid var(--line);border-radius:10px;font:inherit}
.calc button{background:var(--accent);color:#fff;border:0;border-radius:10px;padding:12px 16px;font:inherit;font-weight:700;cursor:pointer}
#calcOut{margin-top:12px;font-weight:600}
footer.bot{border-top:1px solid var(--line);background:#fff;color:var(--muted);font-size:.9rem}
footer.bot .wrap{padding-top:22px;padding-bottom:28px;display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
@media (max-width:560px){.btn.ghost{margin:10px 0 0}.article{padding:20px}}