:root{
  --bg: #fbfcff;
  --bg2:#f4f8ff;
  --card:#ffffff;
  --text:#0f172a;
  --muted:#475569;
  --line:#e5e7eb;
  --brand:#2563eb;
  --brand2:#10b981;
  --shadow: 0 10px 28px rgba(2,8,23,.08);
  --radius: 18px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji","Segoe UI Emoji";
  background: radial-gradient(1200px 700px at 10% 0%, #eef6ff 0%, var(--bg) 55%) ,
              radial-gradient(900px 600px at 95% 10%, #effdf8 0%, rgba(255,255,255,0) 55%),
              linear-gradient(180deg, var(--bg) 0%, #ffffff 100%);
  color:var(--text);
  line-height:1.55;
}
a{color:inherit;text-decoration:none}
a:hover{opacity:.92}
.container{max-width:1120px;margin:0 auto;padding:0 18px}
header{
  position:sticky;top:0;z-index:10;
  backdrop-filter:saturate(160%) blur(10px);
  background: rgba(251,252,255,.74);
  border-bottom:1px solid rgba(229,231,235,.75);
}
.nav{display:flex;align-items:center;justify-content:space-between;padding:12px 0;gap:14px}
.brand{display:flex;align-items:center;gap:10px}
.brand .mark{
  width:38px;height:38px;border-radius:12px;
  background: linear-gradient(135deg, var(--brand) 0%, var(--brand2) 100%);
  box-shadow: var(--shadow);
}
.brand .title{font-weight:800;letter-spacing:-.02em}
.brand .sub{font-size:.85rem;color:var(--muted);margin-top:1px}
.links{display:flex;gap:10px;flex-wrap:wrap;align-items:center;justify-content:flex-end}
.links a{
  padding:8px 10px;border-radius:12px;border:1px solid rgba(229,231,235,.8);
  background: rgba(255,255,255,.7);
}
.links a.primary{
  border-color: rgba(37,99,235,.35);
  background: linear-gradient(180deg, rgba(37,99,235,.10), rgba(16,185,129,.08));
}
.hero{padding:34px 0 14px}
.hero-grid{display:grid;grid-template-columns:1.3fr .7fr;gap:16px;align-items:stretch}
@media (max-width: 900px){.hero-grid{grid-template-columns:1fr}}
.card{
  background: rgba(255,255,255,.82);
  border:1px solid rgba(229,231,235,.85);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.hero-card{padding:22px}
.h-eyebrow{
  display:inline-flex;gap:8px;align-items:center;
  font-size:.86rem;color:var(--muted);
  padding:6px 10px;border-radius:999px;border:1px solid rgba(229,231,235,.85);
  background: rgba(255,255,255,.7);
}
h1{font-size:2.2rem;line-height:1.08;letter-spacing:-.03em;margin:10px 0 10px}
@media (max-width: 520px){h1{font-size:1.85rem}}
.lede{color:var(--muted);font-size:1.03rem;margin:0 0 16px}
.btns{display:flex;gap:10px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:10px;
  padding:10px 14px;border-radius:14px;border:1px solid rgba(229,231,235,.9);
  background: rgba(255,255,255,.8);
  font-weight:700;
}
.btn.primary{
  border-color: rgba(37,99,235,.35);
  background: linear-gradient(135deg, rgba(37,99,235,.16), rgba(16,185,129,.12));
}
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width: 900px){.grid-3{grid-template-columns:1fr}}
.section{padding:10px 0 24px}
.section h2{margin:0 0 10px;font-size:1.3rem;letter-spacing:-.02em}
.kicker{color:var(--muted);margin:0 0 12px}
.pad{padding:16px}
.badge{
  display:inline-flex;align-items:center;gap:8px;
  font-size:.85rem;color:var(--muted);
  padding:6px 10px;border-radius:999px;border:1px solid rgba(229,231,235,.9);
  background: rgba(255,255,255,.7);
}
.list{display:flex;flex-direction:column;gap:10px}
.item{padding:14px;border-radius:16px;border:1px solid rgba(229,231,235,.9);background:rgba(255,255,255,.75)}
.item .small{color:var(--muted);font-size:.92rem;margin-top:6px}
hr{border:none;border-top:1px solid rgba(229,231,235,.9);margin:12px 0}
footer{padding:26px 0 34px;color:var(--muted);font-size:.95rem}
.footer-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:14px}
@media (max-width: 900px){.footer-grid{grid-template-columns:1fr}}
.footer-links{display:flex;flex-wrap:wrap;gap:8px}
.footer-links a{padding:6px 10px;border-radius:999px;border:1px solid rgba(229,231,235,.9);background:rgba(255,255,255,.72)}
.notice{font-size:.9rem;color:var(--muted)}
.article{max-width:820px;margin:0 auto;padding:18px}
.article h1{font-size:2rem}
.article p{margin:10px 0}
.article blockquote{
  margin:12px 0;padding:12px 14px;border-left:4px solid rgba(37,99,235,.35);
  background: rgba(37,99,235,.06);border-radius:14px;color:var(--text)
}
.breadcrumbs{font-size:.9rem;color:var(--muted);margin:8px 0 0}
.code{
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  font-size:.9rem;background:rgba(15,23,42,.03);border:1px solid rgba(229,231,235,.9);
  padding:10px 12px;border-radius:14px;overflow:auto
}