:root{
  --blue:#6caed6;
  --blue-dark:#0a7bcc;
  --blue-soft:#eaf4fb;
  --bg:#ffffff;
  --text:#1e2433;
  --text-muted:#5b6472;
  --border:#e8e8ef;
  --radius:14px;
  --shadow:0 1px 3px rgba(16,24,40,.06), 0 1px 2px rgba(16,24,40,.04);
}
*{box-sizing:border-box;}
body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:var(--bg);
  color:var(--text);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--blue-dark);text-decoration:none;}
a:hover{text-decoration:underline;}

.site-header{border-bottom:1px solid var(--border);}
.header-inner{
  max-width:1100px;margin:0 auto;padding:16px 24px;
  display:flex;align-items:center;gap:24px;
}
.brand{display:inline-flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--text);text-decoration:none;}
.brand-badge{
  width:30px;height:30px;border-radius:9px;
  background:linear-gradient(135deg,#8dc6e6,var(--blue-dark));
  display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;
}
.main-nav{display:flex;gap:20px;flex-wrap:wrap;margin-right:auto;}
.main-nav a{color:var(--text-muted);font-size:14px;font-weight:600;text-decoration:none;}
.main-nav a:hover{color:var(--blue-dark);}
.cta-btn{
  background:var(--blue);color:#fff;padding:8px 16px;border-radius:8px;
  font-size:14px;font-weight:700;text-decoration:none;white-space:nowrap;
}
.cta-btn:hover{background:var(--blue-dark);text-decoration:none;}

.wrap{max-width:1100px;margin:0 auto;padding:40px 24px 70px;}
.wrap-narrow{max-width:720px;margin:0 auto;padding:40px 24px 70px;}

.breadcrumb{font-size:13px;color:var(--text-muted);margin:0 0 18px;}
.breadcrumb a{color:var(--text-muted);}

h1{font-size:34px;font-weight:800;margin:0 0 12px;letter-spacing:-.01em;}
.category-tagline{font-size:17px;color:var(--text-muted);max-width:620px;margin:0 0 36px;}

.cat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:18px;}
.cat-card{
  display:block;background:var(--blue-soft);border:1px solid var(--border);border-radius:var(--radius);
  padding:24px;color:var(--text);text-decoration:none;
}
.cat-card:hover{border-color:var(--blue);text-decoration:none;}
.cat-card h2{margin:0 0 8px;font-size:19px;color:var(--blue-dark);}
.cat-card p{margin:0;color:var(--text-muted);font-size:14px;}

.article-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;}
.article-card{
  display:block;background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  padding:22px;color:var(--text);text-decoration:none;box-shadow:var(--shadow);
}
.article-card:hover{border-color:var(--blue);text-decoration:none;}
.article-card-cat{font-size:11px;font-weight:800;color:var(--blue-dark);text-transform:uppercase;letter-spacing:.04em;}
.article-card h2{font-size:18px;margin:8px 0;line-height:1.35;}
.article-card p{font-size:14px;color:var(--text-muted);margin:0 0 12px;}
.read-more{font-size:13px;font-weight:700;color:var(--blue-dark);}

.article-meta{color:var(--text-muted);font-size:14px;margin:0 0 30px;}
.article-body p{font-size:17px;margin:0 0 20px;color:#2b3242;}
.article-body h2{font-size:24px;margin:44px 0 14px;letter-spacing:-.01em;}
.article-body h3{font-size:19px;margin:28px 0 10px;}
.article-body ul, .article-body ol{font-size:17px;color:#2b3242;padding-left:22px;margin:0 0 20px;}
.article-body li{margin:0 0 8px;}
.article-body code{background:var(--blue-soft);padding:2px 6px;border-radius:4px;font-size:15px;}
.article-body strong{color:var(--text);}

.cta-box{
  background:var(--blue-soft);border-radius:var(--radius);padding:30px;margin:50px 0 40px;text-align:center;
}
.cta-box h3{margin:0 0 8px;font-size:20px;}
.cta-box p{margin:0 0 18px;color:var(--text-muted);font-size:15px;}
.cta-btn-lg{
  display:inline-block;background:var(--blue-dark);color:#fff;padding:12px 26px;border-radius:9px;
  font-weight:700;text-decoration:none;font-size:15px;
}
.cta-btn-lg:hover{background:#086aab;text-decoration:none;}

.related{border-top:1px solid var(--border);padding-top:24px;}
.related h3{font-size:15px;text-transform:uppercase;letter-spacing:.04em;color:var(--text-muted);margin:0 0 12px;}
.related ul{padding-left:0;list-style:none;margin:0;}
.related li{margin:0 0 10px;}
.related a{font-size:15px;font-weight:600;}

.site-footer{border-top:1px solid var(--border);margin-top:20px;}
.footer-inner{
  max-width:1100px;margin:0 auto;padding:22px 24px 40px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;
  color:var(--text-muted);font-size:13px;
}
.footer-links{display:flex;gap:18px;}
.footer-links a{color:var(--text-muted);font-weight:600;}

@media (max-width:640px){
  .header-inner{flex-wrap:wrap;}
  .main-nav{order:3;width:100%;gap:14px;}
  h1{font-size:27px;}
}