:root{
  --bg:#f6f8fb;--card:#fff;--ink:#16202c;--muted:#5b6b7b;--line:#e3e8ef;
  --brand:#0b6bcb;--brand-d:#08518f;--good:#0a7d4f;--accent:#eef5ff;--radius:12px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:system-ui,-apple-system,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.6;font-size:16px}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1080px;margin:0 auto;padding:0 18px}
header{background:var(--card);border-bottom:1px solid var(--line)}
.bar{display:flex;align-items:center;justify-content:space-between;padding:14px 0;flex-wrap:wrap;gap:10px}
.logo{font-weight:800;font-size:1.25rem;color:var(--ink)}
.logo span{color:var(--brand)}
nav a{margin-left:18px;color:var(--muted);font-weight:600;font-size:.94rem}
main{padding:26px 0 40px}
.crumbs{font-size:.85rem;color:var(--muted);margin-bottom:14px}
.crumbs a{color:var(--muted)}
h1{font-size:1.8rem;line-height:1.25;margin-bottom:6px}
h2{font-size:1.3rem;margin:30px 0 12px}
.lead{color:var(--muted);margin-bottom:22px}
.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:24px;align-items:start}
@media(max-width:820px){.grid{grid-template-columns:1fr}}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px}
.field{margin-bottom:16px}
.field label{display:block;font-weight:600;font-size:.92rem;margin-bottom:6px}
.input-box{display:flex;align-items:stretch;border:1px solid var(--line);border-radius:9px;overflow:hidden;background:#fff}
.input-box:focus-within{border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,107,203,.12)}
.input-box input{flex:1;border:0;padding:11px 12px;font-size:1rem;outline:0;min-width:0;width:100%}
.affix{background:#f1f4f8;color:var(--muted);padding:11px 12px;font-size:.9rem;white-space:nowrap;display:flex;align-items:center}
.result{display:flex;justify-content:space-between;align-items:baseline;padding:12px 0;border-bottom:1px solid var(--line)}
.result:last-child{border-bottom:0}
.result .r-label{color:var(--muted);font-size:.95rem}
.result .r-value{font-weight:700;font-size:1.05rem}
.result.primary{background:var(--accent);margin:-6px -10px 6px;padding:16px 14px;border-radius:9px;border-bottom:0}
.result.primary .r-label{color:var(--brand-d);font-weight:600}
.result.primary .r-value{color:var(--brand-d);font-size:1.55rem}
details{margin-top:18px;border:1px solid var(--line);border-radius:9px}
summary{cursor:pointer;padding:12px 14px;font-weight:600;font-size:.92rem;color:var(--brand)}
.table-scroll{max-height:360px;overflow:auto;border-top:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:.85rem}
th,td{padding:8px 10px;text-align:right;border-bottom:1px solid var(--line);white-space:nowrap}
th{position:sticky;top:0;background:#f1f4f8;font-weight:600}
th:first-child,td:first-child{text-align:left}
.content{margin-top:30px;max-width:760px}
.content p{margin-bottom:14px}
.faq{margin-top:10px}
.faq dt{font-weight:700;margin-top:16px}
.faq dd{color:var(--muted);margin:4px 0 0}
.ad{margin:26px 0;min-height:90px;display:flex;align-items:center;justify-content:center;
  background:#eef1f5;border:1px dashed #c9d2dd;color:#9aa7b4;font-size:.8rem;border-radius:9px}
.cat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:16px;margin-top:18px}
.tile{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:18px;display:block}
.tile:hover{border-color:var(--brand);text-decoration:none;box-shadow:0 4px 14px rgba(16,32,44,.06)}
.tile h3{font-size:1.05rem;color:var(--ink);margin-bottom:4px}
.tile p{color:var(--muted);font-size:.88rem}
.cat-h{margin:28px 0 4px;font-size:1.15rem}
footer{background:var(--card);border-top:1px solid var(--line);padding:24px 0;color:var(--muted);font-size:.85rem}
footer a{color:var(--muted)}
.disclaimer{font-size:.8rem;color:var(--muted);margin-top:24px;padding-top:14px;border-top:1px solid var(--line)}
/* search */
.search-wrap{position:relative;max-width:560px;margin:0 auto 8px}
.search-wrap.hero{margin:18px auto 26px}
.js-search{width:100%;padding:14px 16px;font-size:1rem;border:1px solid var(--line);border-radius:10px;outline:0;background:#fff}
.js-search:focus{border-color:var(--brand);box-shadow:0 0 0 3px rgba(11,107,203,.12)}
.bar .js-search{padding:9px 12px;font-size:.92rem}
.bar .search-wrap{margin:0;max-width:260px;flex:1}
.js-search-results{display:none;position:absolute;z-index:30;left:0;right:0;top:calc(100% + 6px);background:#fff;border:1px solid var(--line);border-radius:10px;box-shadow:0 10px 30px rgba(16,32,44,.14);overflow:hidden}
.sr-item{display:flex;flex-direction:column;padding:10px 14px;border-bottom:1px solid var(--line);color:var(--ink)}
.sr-item:last-child{border-bottom:0}
.sr-item:hover{background:var(--accent);text-decoration:none}
.sr-item span{font-size:.8rem;color:var(--muted)}
.sr-empty{padding:14px;color:var(--muted);font-size:.9rem}
/* chart */
#calc-chart{margin-top:16px;display:flex;flex-wrap:wrap;gap:18px;align-items:center;justify-content:center}
.chart-svg{width:170px;height:170px}
.chart-svg.line{width:100%;max-width:340px;height:auto}
.legend{font-size:.85rem;color:var(--muted)}
.legend .lg{display:flex;align-items:center;gap:8px;margin:5px 0}
.legend .lg span{width:12px;height:12px;border-radius:3px;display:inline-block}
.foot-links{margin-bottom:8px;font-size:.88rem}
.foot-links a{color:var(--muted);font-weight:600}
.content h2{font-size:1.2rem;margin:24px 0 10px}
.content ul{margin:0 0 14px 20px}
.content li{margin:4px 0}
@media(max-width:560px){.bar nav{display:none}}