:root{--bg:#050d24;--bg2:#0a1838;--card:#0f2149;--card2:#13285a;--line:rgba(126,200,240,.2);--text:#e8eefb;--muted:#b3c2e0;--soft:#8fa3c8;--gold1:#ffe7a3;--gold2:#f2b84b;--gold3:#b07a1e;--blue:#1f86e0;--blue2:#6fc6ff}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
body{margin:0;background:radial-gradient(circle at 50% -10%,#1d3f86 0,var(--bg) 55%) fixed,var(--bg);color:var(--text);font:16px/1.7 Inter,"Segoe UI",Roboto,system-ui,-apple-system,sans-serif;overflow-x:clip}
img{max-width:100%;height:auto;display:block}
a{color:var(--blue2)}
.wrap{width:min(100% - 32px,1140px);margin:0 auto}

/* header */
.top{position:sticky;top:0;z-index:50;background:rgba(5,13,36,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.top .wrap{display:flex;align-items:center;gap:16px;height:68px}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none;color:#fff;flex:none}
.logo img{width:40px;height:40px;border-radius:11px;border:1px solid rgba(242,184,75,.6)}
.logo b{display:block;font-size:17px;letter-spacing:.06em;line-height:1.1}
.logo small{display:block;font-size:10px;color:var(--gold1);letter-spacing:.08em;text-transform:uppercase}
.nav{display:none;gap:2px;margin-left:auto}
.nav a{padding:8px 11px;border-radius:9px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:600;white-space:nowrap}
.nav a:hover,.nav a[aria-current]{background:var(--card2);color:#fff}
.top .btn{margin-left:auto}
.menu{position:relative}
.menu>summary{list-style:none;cursor:pointer;width:42px;height:42px;display:grid;place-items:center;border-radius:10px;background:var(--card)}
.menu>summary::-webkit-details-marker{display:none}
.menu>summary span,.menu>summary span:before,.menu>summary span:after{display:block;width:20px;height:2px;background:#fff;border-radius:2px;position:relative;content:""}
.menu>summary span:before{position:absolute;top:-6px}.menu>summary span:after{position:absolute;top:6px}
.menu nav{position:absolute;right:0;top:50px;width:240px;padding:8px;border-radius:14px;background:#0b1a3f;border:1px solid var(--line);box-shadow:0 20px 50px rgba(0,0,0,.6)}
.menu nav a{display:block;padding:11px 12px;border-radius:9px;color:#fff;text-decoration:none;font-weight:600;font-size:15px}
.menu nav a:hover,.menu nav a[aria-current]{background:var(--card2)}
@media(min-width:1080px){.nav{display:flex}.menu{display:none}.top .btn{margin-left:8px}}

/* buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:11px 20px;border-radius:999px;font-weight:800;font-size:14px;letter-spacing:.04em;text-transform:uppercase;text-decoration:none;white-space:nowrap;transition:transform .15s,filter .15s}
.btn:hover{transform:translateY(-1px);filter:brightness(1.07)}
.btn-gold{color:#2a1200;background:linear-gradient(180deg,var(--gold1),var(--gold2) 55%,var(--gold3));box-shadow:0 0 18px rgba(242,184,75,.35)}
.btn-blue{color:#fff;background:linear-gradient(180deg,#5cc0ff,var(--blue) 50%,#0b4a9a);box-shadow:0 0 18px rgba(31,134,224,.4)}
.btn-ghost{color:#fff;background:var(--card);border:1px solid var(--line)}
.top .btn{padding:9px 16px;font-size:13px}

/* banners */
.banner{display:block;margin:18px 0;border-radius:16px;overflow:hidden;box-shadow:0 0 0 1px rgba(126,200,240,.35),0 14px 36px rgba(0,0,0,.45)}
.banner img{width:100%}
.banner-sq{max-width:300px;margin:28px auto}

/* hero */
.hero{padding:10px 0 6px}
.crumbs{font-size:13px;color:var(--soft);margin:14px 0 4px}
.crumbs a{color:var(--soft);text-decoration:none}.crumbs a:hover{color:#fff}
.kicker{display:inline-block;margin:10px 0 6px;padding:4px 12px;border-radius:999px;background:rgba(242,184,75,.14);color:var(--gold1);font-size:12px;font-weight:800;letter-spacing:.12em;text-transform:uppercase}
h1{margin:4px 0 12px;font-size:clamp(28px,5vw,42px);line-height:1.15;letter-spacing:-.02em}
.lead{color:var(--muted);font-size:17px;max-width:780px;margin:0 0 18px}
.hero-cta{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:8px}
.meta{font-size:13px;color:var(--soft);margin-top:10px}

/* layout */
.layout{display:grid;gap:28px;margin:20px 0 40px;grid-template-columns:minmax(0,1fr)}
.layout>*{min-width:0}
@media(min-width:960px){.layout{grid-template-columns:minmax(0,1fr) 300px}.side{position:sticky;top:88px;align-self:start}}
.card{background:linear-gradient(160deg,var(--card),#0a1736);border:1px solid var(--line);border-radius:20px;padding:clamp(18px,4vw,34px)}
.toc{margin:0 0 26px;padding:16px 18px;border-radius:14px;background:var(--bg2);border:1px solid var(--line)}
.toc strong{display:block;color:var(--gold2);margin-bottom:6px;font-size:14px;letter-spacing:.06em;text-transform:uppercase}
.toc ol{margin:0;padding-left:20px;columns:2;column-gap:28px}
.toc li{font-size:14px;margin:3px 0;break-inside:avoid}
.toc a{color:var(--muted);text-decoration:none}.toc a:hover{color:#fff}
@media(max-width:640px){.toc ol{columns:1}}

/* article typography */
.article h2{margin:38px 0 12px;font-size:clamp(22px,3.2vw,28px);line-height:1.25;color:#fff}
.article h2:first-of-type{margin-top:6px}
.article h3{margin:26px 0 8px;font-size:19px;color:var(--gold1)}
.article p,.article li{color:var(--muted)}
.article strong{color:#fff}
.article ul,.article ol{padding-left:22px}
.article li{margin:6px 0}
.article li::marker{color:var(--gold2);font-weight:700}
.article a{font-weight:600}
.table-wrap{overflow-x:auto;margin:16px 0 20px;border-radius:12px;border:1px solid var(--line)}
table{width:100%;border-collapse:collapse;font-size:14px;min-width:480px}
th{background:var(--card2);color:#fff;text-align:left;padding:11px 12px}
td{padding:10px 12px;border-top:1px solid var(--line);color:var(--muted);vertical-align:top}
td:first-child{color:#fff;font-weight:600}

.steps{display:grid;gap:10px;margin:16px 0}
.step{display:flex;gap:14px;padding:14px;border-radius:14px;background:var(--bg2);border:1px solid var(--line)}
.step b{flex:none;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#2a1200;background:linear-gradient(180deg,var(--gold1),var(--gold2))}
.step strong{display:block;color:#fff}.step span{display:block;color:var(--muted);font-size:14px}
.step a{font-size:13px;text-decoration:none}
.compare{display:grid;gap:10px;margin:16px 0}
@media(min-width:640px){.compare{grid-template-columns:repeat(auto-fit,minmax(180px,1fr))}}
.compare>div{padding:16px;border-radius:14px;background:var(--bg2);border:1px solid var(--line)}
.compare strong{display:block;color:var(--gold1);margin-bottom:4px}.compare span{color:var(--muted);font-size:14px}
.cta-box{display:flex;flex-wrap:wrap;align-items:center;gap:8px 16px;margin:26px 0;padding:18px 20px;border-radius:16px;background:linear-gradient(135deg,#0e2a66,#13285a);border:1px solid rgba(242,184,75,.5)}
.cta-box strong{color:var(--gold1);font-size:17px;flex:1 1 100%}
.cta-box span{color:var(--muted);font-size:14px;flex:1 1 220px}

/* faq */
.faq{margin-top:34px}
.faq details{margin:10px 0;border-radius:13px;background:var(--bg2);border:1px solid var(--line);overflow:hidden}
.faq summary{list-style:none;cursor:pointer;display:flex;justify-content:space-between;gap:12px;padding:15px 16px;font-weight:700;color:#fff}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";color:var(--gold2);font-size:22px;line-height:1;transition:transform .2s}
.faq details[open] summary:after{transform:rotate(45deg)}
.faq details p{margin:0;padding:0 16px 16px;color:var(--muted)}

/* side */
.side .card{padding:18px}
.side h3{margin:0 0 10px;font-size:15px;letter-spacing:.06em;text-transform:uppercase;color:var(--gold2)}
.side ul{list-style:none;margin:0;padding:0}
.side li a{display:block;padding:8px 10px;border-radius:9px;color:var(--muted);text-decoration:none;font-size:14px;font-weight:600}
.side li a:hover,.side li a[aria-current]{background:var(--card2);color:#fff}
.side .banner{margin:16px auto 0;max-width:300px}

/* related */
.related{display:grid;gap:12px;margin:10px 0 40px}
@media(min-width:720px){.related{grid-template-columns:repeat(3,1fr)}}
.related a{display:block;padding:18px;border-radius:16px;background:var(--card);border:1px solid var(--line);text-decoration:none}
.related a:hover{border-color:rgba(242,184,75,.6)}
.related b{display:block;color:#fff;margin-bottom:4px}.related span{color:var(--muted);font-size:14px}
.section-title{font-size:22px;margin:0 0 12px}

/* footer */
footer{border-top:1px solid var(--line);background:#040a1c;padding:30px 0 120px;color:var(--soft);font-size:14px}
footer .cols{display:grid;gap:20px}
@media(min-width:760px){footer .cols{grid-template-columns:2fr 1fr 1fr}}
footer h4{color:#fff;margin:0 0 8px;font-size:15px}
footer ul{list-style:none;padding:0;margin:0}footer li{margin:5px 0}
footer a{color:var(--soft);text-decoration:none}footer a:hover{color:#fff}
.disclaimer{margin-top:22px;padding:14px 16px;border-radius:12px;background:var(--bg2);border:1px solid var(--line);font-size:13px}

/* sticky bar */
.bar-toggle{display:none}
.bar{position:fixed;z-index:60;left:50%;bottom:max(10px,env(safe-area-inset-bottom));transform:translateX(-50%);width:min(100% - 20px,520px);display:flex;align-items:center;gap:10px;padding:8px 10px;border-radius:16px;background:rgba(8,20,52,.97);border:1px solid rgba(242,184,75,.6);box-shadow:0 14px 40px rgba(0,0,0,.6)}
.bar img{width:42px;height:42px;border-radius:10px;flex:none}
.bar span{flex:1;min-width:0;font-size:12px;line-height:1.3;color:var(--muted)}
.bar span strong{display:block;color:var(--gold1);font-size:13px}
.bar .btn{padding:9px 14px;font-size:12px}
.bar label{flex:none;width:26px;height:26px;display:grid;place-items:center;cursor:pointer;color:var(--soft);font-size:20px}
.bar-toggle:checked~.bar{display:none}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}