:root{
  --navy:#0b2545; --navy2:#13315c; --blue:#0071e3; --blue2:#2c7be5;
  --ink:#1d2433; --mut:#5b6678; --bg:#f5f8fc; --card:#fff; --line:#e3e8ef;
  --ok:#1a8f5a;
}
*{box-sizing:border-box}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;font-size:16px}
a{color:var(--blue);text-decoration:none}a:hover{text-decoration:underline}
.wrap{max-width:920px;margin:0 auto;padding:0 20px}
/* Header */
.site-head{background:linear-gradient(135deg,var(--navy),var(--navy2));color:#fff;padding:18px 0}
.site-head .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px}
.brand{font-size:19px;font-weight:700;letter-spacing:.3px}
.brand span{color:#7fb2ff}
.nav a{color:#cdd8ea;margin-left:18px;font-size:14px}
.nav a:hover{color:#fff}
/* Hero */
.hero{padding:54px 0 40px;text-align:center;background:
  radial-gradient(1200px 400px at 50% -120px,rgba(0,113,227,.18),transparent)}
.hero h1{font-size:34px;margin:0 0 12px;color:var(--navy);line-height:1.25}
.hero p{font-size:17px;color:var(--mut);max-width:640px;margin:0 auto 22px}
.cta{display:inline-block;background:var(--blue);color:#fff;padding:12px 26px;border-radius:30px;font-weight:600;font-size:15px}
.cta:hover{background:var(--blue2);text-decoration:none}
/* Cards grid */
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:18px;margin:30px 0}
.card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;box-shadow:0 2px 8px rgba(20,40,80,.05);transition:.15s}
.card:hover{transform:translateY(-2px);box-shadow:0 6px 18px rgba(20,40,80,.1)}
.card h3{margin:0 0 8px;font-size:18px;color:var(--navy)}
.card p{margin:0 0 14px;color:var(--mut);font-size:14.5px}
.card .more{font-weight:600;font-size:14px}
/* Article */
.article{padding:30px 0 20px}
.article h1{font-size:30px;color:var(--navy);margin:0 0 6px;line-height:1.3}
.article .meta{color:var(--mut);font-size:13.5px;margin-bottom:22px;border-bottom:1px solid var(--line);padding-bottom:12px}
.article h2{font-size:22px;color:var(--navy2);margin:30px 0 10px;border-left:4px solid var(--blue);padding-left:10px}
.article h3{font-size:18px;color:var(--navy2);margin:22px 0 8px}
.article p{margin:12px 0}
.article ul,.article ol{padding-left:22px;margin:12px 0}
.article li{margin:6px 0}
.article blockquote{margin:18px 0;padding:12px 18px;background:#eef5ff;border-left:4px solid var(--blue);border-radius:0 10px 10px 0;color:var(--navy2)}
.note{background:#f1f8f4;border-left:4px solid var(--ok);border-radius:0 10px 10px 0;padding:12px 18px;margin:18px 0;font-size:14.5px;color:#14502f}
.back{display:inline-block;margin:24px 0;font-weight:600}
/* Footer */
.site-foot{background:var(--navy);color:#aebfd6;padding:30px 0;margin-top:40px;font-size:13.5px;text-align:center}
.site-foot a{color:#7fb2ff}
.breadcrumb{font-size:13px;color:var(--mut);margin:18px 0 0}
.breadcrumb a{color:var(--blue2)}