:root{--ink:#12203a;--muted:#5a6b86;--bg:#f5f7fb;--card:#ffffff;--sky:#0e7ad6;
--sky2:#0a5aa8;--gold:#ffb020;--line:#dce4f0;--dark:#0d1526;--ok:#178f5a;--bad:#c0392b}
*{box-sizing:border-box}
html,body{width:100%;overflow-x:hidden;margin:0}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif;
color:var(--ink);background:var(--bg);line-height:1.68;font-size:17px}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}
a{color:var(--sky2)}
img{max-width:100%;height:auto;display:block}
header.site{background:var(--dark);position:sticky;top:0;z-index:40}
.head-row{display:flex;align-items:center;gap:16px;flex-wrap:nowrap;padding:12px 22px;
max-width:1080px;margin:0 auto}
.brand-logo{color:#fff;font-weight:800;font-size:20px;text-decoration:none;white-space:nowrap;letter-spacing:.2px}
.brand-logo span{color:var(--gold)}
nav.nav-main{display:flex;flex-wrap:nowrap;gap:2px;margin-left:auto}
nav.nav-main a{color:#cdd8ea;text-decoration:none;font-size:14.5px;padding:8px 9px;border-radius:7px;white-space:nowrap}
nav.nav-main a:hover,nav.nav-main a.active{background:#1d2942;color:#fff}
.cta-head{background:var(--gold);color:#22160a !important;font-weight:800;padding:9px 14px;
border-radius:9px;text-decoration:none;white-space:nowrap}
.burger{display:none;margin-left:auto;background:#1d2942;border:0;color:#fff;font-size:22px;
width:44px;height:40px;border-radius:9px;cursor:pointer}
main{padding:26px 0 10px}
h1{font-size:30px;line-height:1.25;margin:6px 0 14px}
h2{font-size:23px;margin:30px 0 10px;line-height:1.3}
h3{font-size:19px;margin:22px 0 8px}
p{margin:0 0 14px}
.crumbs{background:#eef2f9;border-bottom:1px solid var(--line);font-size:13.5px}
.crumbs .wrap{padding-top:9px;padding-bottom:9px}
.crumbs a{color:var(--sky2);text-decoration:none}
.lede{font-size:18.5px;background:var(--card);border-left:4px solid var(--sky);
padding:14px 18px;border-radius:10px;margin:0 0 20px;box-shadow:0 1px 3px rgba(20,40,80,.06)}
figure{margin:0 0 22px}
figure img{border-radius:14px;box-shadow:0 6px 22px rgba(15,40,80,.14);cursor:zoom-in}
figcaption{color:var(--muted);font-size:13.5px;margin-top:7px;text-align:center}
ul.ticks,ol.steps{margin:0 0 16px;padding-left:0}
ul.ticks{list-style:none}
ul.ticks li{position:relative;padding:6px 0 6px 30px}
ul.ticks li:before{content:"\2708";position:absolute;left:0;top:6px;color:var(--sky)}
ol.steps{padding-left:22px}
ol.steps li{margin:7px 0;padding-left:4px}
.pc{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:18px 0}
.pc .box{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px}
.pc .box h3{margin-top:0}
.pc .pros li:before{content:"\2714";color:var(--ok)}
.pc .cons li:before{content:"\2716";color:var(--bad)}
.pc ul{list-style:none;margin:0;padding:0}
.pc li{position:relative;padding:5px 0 5px 26px}
.pc li:before{position:absolute;left:0;top:5px}
.table-scroll{overflow-x:auto;margin:0 0 18px;border:1px solid var(--line);border-radius:12px}
table{border-collapse:collapse;width:100%;min-width:460px;background:var(--card)}
th,td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;font-size:15px}
th{background:#eaf2fb}
.spin{background:linear-gradient(135deg,#0e7ad6,#0a3f7d);color:#eaf3ff;border-radius:16px;
padding:20px 22px;margin:24px 0}
.spin h3{color:#fff;margin-top:0}
.spin b{color:var(--gold)}
.cta-block{text-align:center;margin:28px 0 10px}
.cta-block a.btn{display:inline-block;background:var(--gold);color:#22160a;font-weight:800;
font-size:18px;padding:15px 34px;border-radius:12px;text-decoration:none;box-shadow:0 6px 18px rgba(255,176,32,.4)}
.tabs{margin:20px 0}
.tabs .tabbtns{display:flex;flex-wrap:wrap;gap:6px}
.tabs .tabbtns button{background:#e7eef8;border:1px solid var(--line);border-radius:9px 9px 0 0;
padding:9px 15px;cursor:pointer;font-size:14.5px;font-weight:700;color:var(--ink)}
.tabs .tabbtns button.on{background:var(--card);border-bottom-color:var(--card);color:var(--sky2)}
.tabp{background:var(--card);border:1px solid var(--line);border-radius:0 12px 12px 12px;padding:16px 18px}
.tabp[hidden]{display:none}
.calc{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin:20px 0}
.calc label{display:block;font-size:14px;font-weight:700;margin:8px 0 4px}
.calc input{width:100%;padding:9px 11px;border:1px solid var(--line);border-radius:8px;font-size:15px}
.calc .out{margin-top:12px;font-size:17px;font-weight:800;color:var(--sky2)}
details{background:var(--card);border:1px solid var(--line);border-radius:11px;margin:9px 0;padding:2px 16px}
details summary{cursor:pointer;font-weight:700;padding:11px 0;list-style:none}
details summary::-webkit-details-marker{display:none}
details summary:after{content:"+";float:right;color:var(--sky)}
details[open] summary:after{content:"\2212"}
details .ans{padding:0 0 12px;color:#26364f}
.note{background:#fff7e6;border:1px solid #ffe1a6;border-radius:10px;padding:12px 15px;color:#5b4415;margin:16px 0}
footer.site{background:var(--dark);color:#aebbd0;margin-top:34px;padding:26px 0}
footer.site .cols{display:flex;flex-wrap:wrap;gap:26px;justify-content:space-between}
footer.site a{color:#cdd8ea;text-decoration:none;display:block;padding:3px 0;font-size:14.5px}
footer.site h4{color:#fff;font-size:15px;margin:0 0 8px}
footer.site .fine{border-top:1px solid #24314c;margin-top:18px;padding-top:14px;font-size:12.7px;color:#8595b0}
.totop{position:fixed;right:16px;bottom:16px;background:var(--sky2);color:#fff;border:0;border-radius:50%;
width:46px;height:46px;font-size:20px;cursor:pointer;display:none;z-index:50}
.totop.show{display:block}
.overlay{position:fixed;inset:0;background:rgba(6,12,24,.9);display:flex;align-items:center;
justify-content:center;padding:20px;z-index:60}
.overlay[hidden]{display:none}
.overlay img{max-width:96%;max-height:92%;border-radius:12px;cursor:zoom-out}
@media(max-width:860px){
.burger{display:block}
nav.nav-main{display:none;position:absolute;top:64px;left:0;right:0;background:var(--dark);
flex-direction:column;gap:0;padding:8px 14px 16px;margin-left:0}
nav.nav-main.open{display:flex}
nav.nav-main a{padding:12px 8px;border-bottom:1px solid #1d2942}
.cta-head{display:none}
nav.nav-main .cta-head{display:block;background:var(--gold);color:#22160a !important;
text-align:center;margin-top:10px;border-bottom:0}
.pc{grid-template-columns:1fr}
h1{font-size:25px}
}
@media(max-width:720px){
.wrap{padding:0 22px}
.head-row{padding:12px 22px}
}