:root{
  --bg:#0f1115; --panel:#161a21; --panel2:#1c222b;
  --text:#e6e9ef; --muted:#8b94a3; --line:#242b36;
  --accent:#4ea1ff; --accent2:#38d39f; --warn:#ffb454; --danger:#ff6b6b;
  --code-bg:#0b0e13;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);
  font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:900px;margin:0 auto;padding:0 24px}

/* header */
header.site{
  border-bottom:1px solid var(--line);
  background:linear-gradient(180deg,#12161d,#0f1115);
  padding:28px 0 22px;margin-bottom:44px;
}
header.site .wrap{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:12px}
.brand .logo{
  width:38px;height:38px;border-radius:10px;
  background:linear-gradient(135deg,var(--accent),var(--accent2));
  display:flex;align-items:center;justify-content:center;
  font-weight:700;color:#08111c;font-size:17px;
}
.brand h1{font-size:19px;font-weight:650;letter-spacing:.2px}
.brand p{font-size:12.5px;color:var(--muted);margin-top:1px}
nav.top{display:flex;gap:18px;font-size:14px}
nav.top a{color:var(--muted)}
nav.top a:hover{color:var(--text);text-decoration:none}

/* hero */
.hero{margin-bottom:44px}
.hero h2{font-size:30px;line-height:1.35;font-weight:680;letter-spacing:-.3px;margin-bottom:14px}
.hero p{color:var(--muted);font-size:15.5px;max-width:660px}
.stats{display:flex;gap:34px;margin-top:26px;flex-wrap:wrap}
.stat b{display:block;font-size:22px;color:var(--accent2);font-weight:650;font-variant-numeric:tabular-nums}
.stat span{font-size:12.5px;color:var(--muted)}

/* cards */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:16px;margin:26px 0 46px}
.card{
  background:var(--panel);border:1px solid var(--line);border-radius:14px;
  padding:20px 20px 18px;transition:.18s ease;display:block;
}
.card:hover{border-color:#31405a;background:var(--panel2);transform:translateY(-2px);text-decoration:none}
.card .tag{font-size:11.5px;letter-spacing:.6px;text-transform:uppercase;color:var(--accent);font-weight:600}
.card h3{font-size:16.5px;margin:8px 0 8px;font-weight:620;color:var(--text);line-height:1.45}
.card p{font-size:13.5px;color:var(--muted);line-height:1.65}
.card .meta{margin-top:12px;font-size:12px;color:#5f6b7d;font-variant-numeric:tabular-nums}

/* article */
article{max-width:760px;margin:0 auto 70px}
article .kicker{font-size:12.5px;color:var(--accent);letter-spacing:.8px;text-transform:uppercase;font-weight:600;margin-bottom:10px}
article h1{font-size:31px;line-height:1.35;font-weight:680;letter-spacing:-.3px;margin-bottom:12px}
article .sub{color:var(--muted);font-size:14.5px;margin-bottom:8px}
article .date{font-size:12.5px;color:#5f6b7d;padding-bottom:22px;border-bottom:1px solid var(--line);margin-bottom:30px}
article h2{font-size:21px;font-weight:650;margin:38px 0 14px;padding-left:12px;border-left:3px solid var(--accent)}
article h3{font-size:16.5px;font-weight:640;margin:26px 0 10px;color:#cfd6e2}
article p{margin-bottom:15px;color:#c8cfdb}
article ul,article ol{margin:0 0 16px 22px;color:#c8cfdb}
article li{margin-bottom:7px}
article strong{color:#fff;font-weight:640}
article code{
  background:var(--code-bg);border:1px solid var(--line);border-radius:5px;
  padding:1.5px 6px;font-size:13.5px;color:#8fd3ff;
  font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;
}
pre{
  background:var(--code-bg);border:1px solid var(--line);border-radius:11px;
  padding:16px 18px;overflow-x:auto;margin:0 0 20px;line-height:1.65;
}
pre code{background:none;border:none;padding:0;color:#b8c4d4;font-size:13px;display:block;white-space:pre}
blockquote{
  border-left:3px solid var(--accent2);background:rgba(56,211,159,.06);
  padding:12px 18px;border-radius:0 8px 8px 0;margin:0 0 20px;color:#b9c6d6;font-size:14.5px;
}
blockquote.warn{border-left-color:var(--warn);background:rgba(255,180,84,.07)}
blockquote.danger{border-left-color:var(--danger);background:rgba(255,107,107,.07)}

/* tables */
table{width:100%;border-collapse:collapse;margin:0 0 22px;font-size:14px}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line)}
th{color:var(--muted);font-weight:600;font-size:12.5px;letter-spacing:.4px;text-transform:uppercase;background:#12161d}
td{color:#c8cfdb;font-variant-numeric:tabular-nums}
tr:hover td{background:rgba(255,255,255,.015)}
td.good{color:var(--accent2);font-weight:600}
td.bad{color:var(--danger);font-weight:600}

/* misc */
.pill{display:inline-block;font-size:11.5px;padding:2px 9px;border-radius:20px;background:#1e2836;color:var(--accent);margin:0 6px 6px 0;border:1px solid #2a3444}
footer.site{border-top:1px solid var(--line);padding:26px 0 40px;margin-top:60px;color:#5f6b7d;font-size:13px}
footer.site .wrap{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.back{display:inline-block;margin-bottom:26px;font-size:13.5px;color:var(--muted)}
.back:hover{color:var(--accent);text-decoration:none}
@media(max-width:640px){
  .hero h2{font-size:24px}
  article h1{font-size:24px}
  .stats{gap:22px}
  header.site{padding:20px 0 16px;margin-bottom:30px}
}