:root{
  color-scheme: light;
  --bg:#ffffff; --fg:#0f172a; --muted:#475569; --card:#f8fafc; --card-2:#ffffff;
  --accent:#2563eb; --accent-2:#0ea5e9; --border:#e5e7eb; --ok:#16a34a; --warn:#ca8a04; --danger:#dc2626;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0;background:var(--bg);color:var(--fg);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,
  "PingFang SC","Hiragino Sans GB","Noto Sans CJK SC","Microsoft YaHei",sans-serif;line-height:1.7}
a{color:var(--accent);text-decoration:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.header{position:sticky;top:0;background:#fff;border-bottom:1px solid var(--border);z-index:20}
.nav{display:flex;align-items:center;gap:18px;height:64px}
.nav .brand{font-weight:900;letter-spacing:.3px;font-size:18px;color:var(--fg)}
.nav a{color:var(--fg);opacity:.85}
.nav a:hover{opacity:1}
.hero{padding:42px 0 10px}
.badge{display:inline-block;font-weight:800;color:#fff;background:linear-gradient(90deg,var(--accent),var(--accent-2));
  border-radius:999px;padding:6px 12px;font-size:12px;letter-spacing:.4px}
h1{margin:8px 0 8px;font-size:40px;letter-spacing:.2px}
h2{margin:22px 0 12px;font-size:26px}
h3{margin:10px 0 6px;font-size:18px}
.lead{font-size:18px;color:var(--muted);max-width:860px}
.panel{margin:18px 0;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:18px}
.panel.white{background:var(--card-2)}
.grid{display:grid;gap:16px}
.grid.cols-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid.cols-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid.cols-4{grid-template-columns:repeat(4,minmax(0,1fr))}
@media (max-width:980px){.grid.cols-3{grid-template-columns:repeat(2,1fr)} .grid.cols-4{grid-template-columns:repeat(2,1fr)}}
@media (max-width:680px){.grid.cols-2,.grid.cols-3,.grid.cols-4{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:16px}
.icon{width:28px;height:28px;vertical-align:middle;margin-right:8px}
.kpi{display:flex;align-items:center;gap:10px;background:#fff;border:1px dashed var(--border);border-radius:12px;padding:12px}
.kpi b{font-size:22px}
.table{width:100%;border-collapse:collapse;font-size:14px}
.table th,.table td{border:1px solid var(--border);padding:10px;text-align:left}
.alert{padding:12px 14px;border-radius:10px}
.alert.ok{background:#ecfdf5;border:1px solid #bbf7d0;color:#065f46}
.alert.warn{background:#fffbeb;border:1px solid #fde68a;color:#713f12}
.alert.danger{background:#fef2f2;border:1px solid #fecaca;color:#7f1d1d}
.code{background:#0f172a;color:#e2e8f0;border-radius:12px;padding:14px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:13px;overflow:auto}
.cta{display:flex;gap:12px;flex-wrap:wrap;margin-top:10px}
.btn{display:inline-block;background:var(--accent);color:#fff;padding:10px 14px;border-radius:10px;font-weight:800}
.btn.secondary{background:#0ea5e9}
.note{color:var(--muted);font-size:13px}
.list{background:#fff;border:1px solid var(--border);border-radius:12px;padding:14px}
blockquote{margin:0;padding:12px 14px;border-left:4px solid var(--accent);background:#fff;border-radius:8px}
.footer{margin-top:40px;border-top:1px solid var(--border);background:#fff}
.footer .inner{display:grid;gap:18px;grid-template-columns:2fr 1fr 1fr 1fr;padding:24px 0}
.footer h4{margin:0 0 8px}
.footer ul{list-style:none;margin:0;padding:0}
.footer li{margin:6px 0}
.legal{border-top:1px solid var(--border);padding:12px 0;color:var(--muted);font-size:12px}
.badges{display:flex;gap:10px;flex-wrap:wrap}
.badge-os{display:inline-block;border:1px solid var(--border);border-radius:8px;padding:8px 10px;background:#fff}
hr.sep{border:0;border-top:1px solid var(--border);margin:18px 0}