:root{
  --bt-navy:#101923;
  --bt-blue:#1456a3;
  --bt-blue2:#1e75d8;
  --bt-red:#e33b32;
  --bt-yellow:#ffbf24;
  --bt-bg:#f5f7fb;
  --bt-card:#ffffff;
  --bt-text:#17212c;
  --bt-muted:#637181;
  --bt-line:#dbe4ef;
  --bt-shadow:0 16px 42px rgba(16,25,35,.12);
  --bt-radius:22px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:var(--bt-bg);
  color:var(--bt-text);
  line-height:1.6;
}
img{max-width:100%;height:auto;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,calc(100% - 34px));margin:0 auto}
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--bt-line);
}
.header-inner{min-height:86px;display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:14px;min-width:220px}
.brand img{max-width:220px;width:220px;height:auto}
.main-nav{display:flex;align-items:center;gap:4px;font-weight:850;color:var(--bt-navy)}
.main-nav ul{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.main-nav li{position:relative}
.main-nav a{display:block;padding:12px 13px;border-radius:12px}
.main-nav a:hover{background:#eef5ff;color:var(--bt-blue)}
.main-nav .menu-item-has-children>a::after{content:"▾";font-size:.8em;margin-left:6px}
.main-nav .sub-menu{
  display:none;position:absolute;top:100%;left:0;min-width:240px;
  background:#fff;border:1px solid var(--bt-line);box-shadow:var(--bt-shadow);
  border-radius:16px;padding:8px;z-index:60
}
.main-nav li:hover>.sub-menu{display:block}
.main-nav .sub-menu li,.main-nav .sub-menu a{width:100%}
.mobile-toggle{display:none;background:var(--bt-navy);color:#fff;border:0;border-radius:12px;padding:11px 14px;font-weight:900}
.hero{
  position:relative;overflow:hidden;background:#101923;color:#fff;
}
.hero-media{position:absolute;inset:0;z-index:0}
.hero-media img{width:100%;height:100%;object-fit:cover;opacity:.72}
.hero::after{
  content:"";position:absolute;inset:0;z-index:1;
  background:linear-gradient(90deg,rgba(16,25,35,.94),rgba(16,25,35,.70) 48%,rgba(16,25,35,.15));
}
.hero-content{
  position:relative;z-index:2;min-height:520px;
  display:flex;align-items:center;padding:72px 0;
}
.hero-copy{max-width:720px}
.eyebrow{margin:0 0 10px;color:var(--bt-yellow);font-weight:950;text-transform:uppercase;letter-spacing:.14em;font-size:.8rem}
h1,h2,h3{line-height:1.12;margin:0 0 18px;color:inherit}
h1{font-size:clamp(2.4rem,5.4vw,4.9rem);letter-spacing:-.045em}
h2{font-size:clamp(1.75rem,3vw,2.75rem);letter-spacing:-.03em;color:var(--bt-navy)}
h3{font-size:1.22rem;color:var(--bt-navy)}
.lead{font-size:1.18rem;color:rgba(255,255,255,.86);max-width:680px;margin:0}
.hero-actions,.section-actions{display:flex;gap:13px;flex-wrap:wrap;margin-top:28px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  min-height:48px;padding:13px 22px;border-radius:999px;
  font-weight:950;border:1px solid transparent;transition:.18s ease;
}
.btn:hover{transform:translateY(-1px)}
.btn-primary{background:var(--bt-red);color:#fff;box-shadow:0 14px 28px rgba(227,59,50,.28)}
.btn-secondary{background:#fff;color:var(--bt-navy);border-color:var(--bt-line)}
.quick-sections{margin-top:-42px;position:relative;z-index:5}
.quick-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:14px;
  background:#fff;border:1px solid var(--bt-line);border-radius:var(--bt-radius);
  padding:14px;box-shadow:var(--bt-shadow)
}
.quick-card{
  padding:20px;border-radius:18px;background:linear-gradient(180deg,#f8fbff,#fff);
  border:1px solid #e3edf8;
}
.quick-card strong{display:block;color:var(--bt-blue);font-size:1.05rem;margin-bottom:6px}
.quick-card span{display:block;color:var(--bt-muted);font-size:.92rem}
.section{padding:78px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:28px}
.section-head p{color:var(--bt-muted);max-width:680px;margin:0}
.post-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.post-card{
  background:#fff;border:1px solid var(--bt-line);border-radius:var(--bt-radius);
  overflow:hidden;box-shadow:0 12px 30px rgba(16,25,35,.08);transition:.18s ease;
}
.post-card:hover{transform:translateY(-3px);box-shadow:var(--bt-shadow)}
.post-thumb{aspect-ratio:3/2;background:#e8eef7;overflow:hidden}
.post-thumb img{width:100%;height:100%;object-fit:cover;transition:.22s ease}
.post-card:hover .post-thumb img{transform:scale(1.035)}
.post-content{padding:22px}
.post-meta{font-size:.82rem;text-transform:uppercase;letter-spacing:.08em;color:var(--bt-blue);font-weight:950;margin-bottom:10px}
.post-content h3{font-size:1.18rem;margin-bottom:10px}
.post-content p{color:var(--bt-muted);margin:0}
.cat-strip{background:#fff;border-top:1px solid var(--bt-line);border-bottom:1px solid var(--bt-line)}
.cat-list{display:flex;gap:10px;flex-wrap:wrap;padding:16px 0}
.cat-list a{background:#f1f6fd;color:var(--bt-navy);padding:10px 15px;border-radius:999px;font-weight:850;border:1px solid var(--bt-line)}
.cat-list a:hover{background:var(--bt-blue);color:#fff}
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 330px;gap:34px;align-items:start}
.content-card,.sidebar-card{
  background:#fff;border:1px solid var(--bt-line);border-radius:var(--bt-radius);
  padding:34px;box-shadow:0 12px 30px rgba(16,25,35,.08)
}
.entry-title{color:var(--bt-navy)}
.entry-content a{color:var(--bt-blue);font-weight:800;text-decoration:underline;text-underline-offset:3px}
.entry-content h2,.entry-content h3{margin-top:32px}
.entry-content p,.entry-content li{font-size:1.05rem}
.sidebar{display:grid;gap:18px;position:sticky;top:110px}
.sidebar-card{padding:24px}
.sidebar-card h3{margin-bottom:14px}
.sidebar-card ul{list-style:none;margin:0;padding:0;display:grid;gap:10px}
.sidebar-card li a{display:block;padding:11px 13px;background:#f7fbff;border:1px solid var(--bt-line);border-radius:12px;font-weight:800}
.newsletter{
  background:linear-gradient(135deg,var(--bt-navy),#1f3144);color:#fff;border-radius:var(--bt-radius);
  padding:32px;box-shadow:var(--bt-shadow)
}
.newsletter h2,.newsletter h3{color:#fff}
.newsletter p{color:rgba(255,255,255,.78)}
.newsletter input{width:100%;min-height:48px;border-radius:999px;border:1px solid rgba(255,255,255,.2);padding:0 18px;margin:10px 0;background:#fff;color:var(--bt-text)}
.newsletter button{width:100%;cursor:pointer}
.pagination{display:flex;justify-content:center;gap:8px;margin-top:34px}
.pagination .page-numbers{padding:10px 14px;background:#fff;border:1px solid var(--bt-line);border-radius:12px;font-weight:850}
.pagination .current{background:var(--bt-blue);color:#fff}
.site-footer{background:var(--bt-navy);color:#fff;padding:54px 0 28px;margin-top:50px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:28px}
.footer-logo img{max-width:230px;margin-bottom:16px}
.site-footer p{color:rgba(255,255,255,.72)}
.site-footer h3{color:#fff;font-size:1.1rem}
.site-footer ul{list-style:none;margin:0;padding:0;display:grid;gap:9px}
.site-footer a{color:rgba(255,255,255,.82)}
.site-footer a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.14);margin-top:32px;padding-top:22px;color:rgba(255,255,255,.62);font-size:.92rem}
.widget-section{background:#fff}
.widget-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}
.widget-box{border:1px solid var(--bt-line);border-radius:18px;padding:22px;background:#fff;box-shadow:0 8px 24px rgba(16,25,35,.06)}
.widget-box h3{font-size:1.08rem}
.widget-box p{color:var(--bt-muted);font-size:.94rem}
@media(max-width:1050px){
  .quick-grid,.widget-grid{grid-template-columns:repeat(2,1fr)}
  .post-grid{grid-template-columns:repeat(2,1fr)}
  .article-layout,.footer-grid{grid-template-columns:1fr}
  .sidebar{position:static}
}
@media(max-width:820px){
  .mobile-toggle{display:block}
  .nav-wrap{display:none;position:absolute;left:17px;right:17px;top:78px;background:#fff;border:1px solid var(--bt-line);border-radius:18px;padding:12px;box-shadow:var(--bt-shadow)}
  .nav-wrap.is-open{display:block}
  .main-nav ul{display:grid;width:100%;gap:4px}
  .main-nav .sub-menu{position:static;display:block;box-shadow:none;border:0;padding:0;margin-left:12px}
  .hero-content{min-height:440px;padding:52px 0}
}
@media(max-width:620px){
  .brand img{max-width:180px}
  .quick-grid,.post-grid,.widget-grid{grid-template-columns:1fr}
  .section{padding:56px 0}
  .section-head{display:block}
  .content-card{padding:24px}
}