:root{--primary:#1F3A5F;--accent:#5DA3FA;--muted:#6B7280;--bg:#ffffff}
*{box-sizing:border-box}
body{margin:0;font-family:Inter,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:#111;background:var(--bg)}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1100px;margin:0 auto;padding:0 20px}
nav{position:sticky;top:0;background:#fff;border-bottom:1px solid #eee;z-index:10}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;gap:10px;align-items:center;font-weight:700}
nav .links a{margin:0 12px;font-weight:600}
.hero{background:linear-gradient(180deg,#f7fbff,#fff);padding:64px 0 32px;border-bottom:1px solid #eee}
.badge{display:inline-block;background:#eaf3ff;color:var(--primary);padding:6px 10px;border-radius:999px;font-weight:600;font-size:12px;margin-bottom:12px}
h1{font-size:38px;line-height:1.15;margin:0 0 10px;color:var(--primary)}
h2{font-size:28px;color:var(--primary);margin:0 0 10px}
.subtitle{color:var(--muted);font-size:18px;max-width:780px}
.section{padding:42px 0;border-bottom:1px solid #f1f1f1}
.grid{display:grid;gap:16px}
.cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{border:1px solid #eee;border-radius:14px;padding:16px;background:#fff}
.card h3{margin:0 0 8px;color:var(--primary)}
.button{display:inline-block;padding:10px 14px;border-radius:10px;background:var(--primary);color:#fff;font-weight:700}
.button.secondary{background:#EEF2F7;color:var(--primary)}
.small{color:var(--muted);font-size:14px}
.table{width:100%;border-collapse:collapse;margin-top:8px}
.table th,.table td{border:1px solid #eee;padding:8px;text-align:left;font-size:14px}
.footer{padding:40px 0;color:#666}
.breadcrumbs{font-size:14px;color:var(--muted);margin:10px 0 0}
.post-title{font-size:32px;color:var(--primary);margin:0 0 8px}
.post-meta{color:#6b7280;font-size:14px;margin-bottom:18px}
code,kbd,pre{font-family:ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace}
@media(max-width:640px){h1{font-size:30px}}