:root{--ink:#12212b;--muted:#4a5b66;--bg:#f5f7f6;--card:#ffffff;--line:#dde5e2;
--brand:#c8402c;--brand-dark:#9c2c1c;--sky:#1f6f8b;--gold:#e0a021;--radius:12px}
*{box-sizing:border-box}
html,body{width:100%;overflow-x:hidden;margin:0}
body{font-family:"Segoe UI",Roboto,-apple-system,Helvetica,Arial,sans-serif;
color:var(--ink);background:var(--bg);line-height:1.62;font-size:17px}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
a{color:var(--sky)}
img{max-width:100%;height:auto;display:block}
h1,h2,h3{line-height:1.25;color:var(--ink)}
h1{font-size:2rem;margin:.4em 0 .3em}
h2{font-size:1.42rem;margin:1.7em 0 .5em;border-left:5px solid var(--brand);padding-left:12px}
h3{font-size:1.16rem;margin:1.3em 0 .4em}
p{margin:.8em 0}
ul,ol{margin:.8em 0;padding-left:1.3em}
li{margin:.35em 0}
/* header */
.site-head{background:var(--ink);color:#fff;position:sticky;top:0;z-index:50}
.head-row{display:flex;align-items:center;gap:14px;flex-wrap:nowrap;
padding:12px 0;min-height:60px}
.brand-logo{color:#fff;font-weight:800;font-size:1.24rem;text-decoration:none;
letter-spacing:.2px;white-space:nowrap;margin-right:6px}
.brand-logo b{color:var(--gold);font-weight:800}
.nav-wrap{margin-left:auto;display:flex;align-items:center;gap:12px;flex-wrap:nowrap}
.nav-main{display:flex;align-items:center;gap:4px;flex-wrap:nowrap}
.nav-main a{color:#e8eef0;text-decoration:none;padding:8px 10px;border-radius:8px;
font-size:.95rem;white-space:nowrap}
.nav-main a:hover,.nav-main a[aria-current="page"]{background:#22384a;color:#fff}
.head-cta{background:var(--brand);color:#fff;text-decoration:none;font-weight:700;
padding:9px 15px;border-radius:9px;white-space:nowrap}
.head-cta:hover{background:var(--brand-dark)}
.burger{display:none;background:none;border:2px solid #3a5062;color:#fff;
border-radius:8px;font-size:1.1rem;padding:6px 11px;cursor:pointer;margin-left:auto}
/* breadcrumb */
.crumbs{background:#eef2f0;border-bottom:1px solid var(--line);font-size:.9rem}
.crumbs .wrap{padding-top:9px;padding-bottom:9px}
.crumbs a{color:var(--sky);text-decoration:none}
.crumbs span{color:var(--muted)}
/* main */
main{padding:8px 0 40px}
.lede{font-size:1.12rem;background:var(--card);border:1px solid var(--line);
border-left:5px solid var(--sky);border-radius:var(--radius);padding:14px 18px;
color:#233}
.hero{border-radius:var(--radius);border:1px solid var(--line);margin:14px 0 6px}
figure{margin:0}
figcaption{font-size:.85rem;color:var(--muted);margin-top:6px}
.spin-note{background:#fff8ec;border:1px solid #f0dcb0;border-radius:var(--radius);
padding:14px 18px;margin:1.4em 0}
.table-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;margin:1em 0}
table{border-collapse:collapse;width:100%;min-width:420px}
th,td{border:1px solid var(--line);padding:9px 12px;text-align:left;font-size:.95rem}
th{background:#eef2f0}
/* widget */
.calc{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
padding:16px 18px;margin:1.4em 0}
.calc .row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.calc button{background:var(--sky);color:#fff;border:0;border-radius:8px;
width:40px;height:40px;font-size:1.3rem;cursor:pointer}
.calc .val{font-weight:800;font-size:1.2rem;min-width:70px;text-align:center}
.calc .out{margin-top:10px;font-weight:700;color:var(--brand-dark)}
/* faq */
details{background:var(--card);border:1px solid var(--line);border-radius:10px;
margin:.6em 0;padding:2px 16px}
summary{cursor:pointer;font-weight:700;padding:12px 0}
details[open]{border-color:var(--sky)}
/* cta */
.cta{text-align:center;margin:2em 0 1em}
.cta .btn{display:inline-block;background:var(--brand);color:#fff;font-weight:800;
text-decoration:none;padding:15px 30px;border-radius:11px;font-size:1.08rem}
.cta .btn:hover{background:var(--brand-dark)}
.cta small{display:block;color:var(--muted);margin-top:8px;font-weight:400}
/* footer */
.site-foot{background:var(--ink);color:#c7d2d8;margin-top:30px;font-size:.92rem}
.site-foot .wrap{padding-top:26px;padding-bottom:26px}
.foot-cols{display:flex;gap:30px;flex-wrap:wrap}
.foot-cols nav{display:flex;flex-direction:column;gap:7px}
.site-foot a{color:#cfe0e6;text-decoration:none}
.foot-legal{border-top:1px solid #2a3d4a;margin-top:18px;padding-top:16px;color:#9fb0b8}
.age{display:inline-block;border:2px solid #7d8f98;border-radius:50%;padding:2px 7px;
font-weight:800;margin-right:8px}
/* back to top */
#totop{position:fixed;right:16px;bottom:16px;background:var(--sky);color:#fff;
border:0;border-radius:50%;width:46px;height:46px;font-size:1.3rem;cursor:pointer;
display:none;z-index:60}
@media(max-width:820px){
  .burger{display:inline-block}
  .nav-wrap{position:absolute;left:0;right:0;top:60px;background:var(--ink);
  margin:0;flex-direction:column;align-items:stretch;gap:0;display:none;padding:6px 22px 16px}
  .nav-wrap.open{display:flex}
  .nav-main{flex-direction:column;align-items:stretch;gap:0}
  .nav-main a{padding:12px 6px;border-bottom:1px solid #23384a}
  .head-cta{margin-top:10px;text-align:center}
  .head-row{position:relative}
  h1{font-size:1.6rem}
}
@media(max-width:420px){.wrap{padding:0 16px}}