*,*::before,*::after{box-sizing:border-box}
:root{
  --bg:#fbfaf8; --panel:#fff; --ink:#16181d; --muted:#6b7280; --line:#e6e3dd;
  --accent:#1a4fd6; --hot:#c2410c; --good:#0f766e; --warn:#b45309;
}
@media (prefers-color-scheme:dark){
  :root{--bg:#0f1115;--panel:#161a21;--ink:#e8e6e1;--muted:#9aa1ac;--line:#272c35;--accent:#7aa2ff}
}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:900px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:var(--panel)}
header.site .wrap{display:flex;align-items:center;gap:14px;height:60px}
.brand{font-weight:700;letter-spacing:-.02em;font-size:18px;color:var(--ink)}
.brand span{color:var(--accent)}
header.site nav{margin-left:auto;display:flex;gap:18px;font-size:14px}
header.site nav a{color:var(--muted)}
.hero{padding:52px 0 30px}
.hero h1{font-size:34px;line-height:1.25;margin:0 0 12px;letter-spacing:-.02em}
.hero p{color:var(--muted);margin:0;max-width:62ch}
.stats{display:flex;flex-wrap:wrap;gap:26px;margin-top:26px;padding-top:22px;border-top:1px solid var(--line)}
.stat b{display:block;font-size:24px;letter-spacing:-.02em}
.stat i{font-style:normal;font-size:12px;color:var(--muted);text-transform:uppercase;letter-spacing:.08em}
.filters{display:flex;flex-wrap:wrap;gap:8px;margin:26px 0 20px}
.chip{border:1px solid var(--line);background:var(--panel);color:var(--muted);
  padding:6px 13px;border-radius:999px;font-size:13px;cursor:pointer}
.chip[aria-pressed=true]{background:var(--ink);color:var(--bg);border-color:var(--ink)}
.cards{display:grid;gap:14px;padding-bottom:70px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:12px;padding:20px 22px;
  display:block;color:inherit;transition:border-color .15s,transform .15s}
.card:hover{text-decoration:none;border-color:var(--accent);transform:translateY(-1px)}
.card .top{display:flex;align-items:flex-start;gap:14px}
.card h2{font-size:18px;margin:0;line-height:1.4;flex:1;letter-spacing:-.01em}
.score{font-variant-numeric:tabular-nums;font-weight:700;font-size:15px;padding:4px 10px;
  border-radius:8px;background:#eef2ff;color:#1a4fd6;white-space:nowrap}
.score.mid{background:#fef3c7;color:#92400e}
.score.low{background:#f3f4f6;color:#4b5563}
.card .thesis{color:var(--muted);font-size:14.5px;margin:10px 0 0}
.meta{display:flex;flex-wrap:wrap;gap:14px;margin-top:12px;font-size:12.5px;color:var(--muted)}
.meta span{display:inline-flex;align-items:center;gap:5px}
.dot{width:6px;height:6px;border-radius:50%;background:currentColor;opacity:.5}
article{padding:44px 0 80px}
article h1{font-size:30px;line-height:1.3;letter-spacing:-.02em;margin:0 0 18px}
article h2{font-size:19px;margin:38px 0 12px;letter-spacing:-.01em;
  padding-bottom:8px;border-bottom:1px solid var(--line)}
article h3{font-size:16px;margin:26px 0 10px}
article p{margin:0 0 14px}
article ul{margin:0 0 16px;padding-left:22px}
article li{margin:6px 0}
blockquote{margin:0 0 22px;padding:14px 18px;background:var(--panel);
  border:1px solid var(--line);border-left:3px solid var(--accent);border-radius:8px;
  color:var(--muted);font-size:14px}
blockquote br{content:"";display:block;margin-top:4px}
.tw{overflow-x:auto;margin:0 0 20px;border:1px solid var(--line);border-radius:10px;background:var(--panel)}
table{border-collapse:collapse;width:100%;font-size:13.5px}
th,td{padding:9px 12px;text-align:left;border-bottom:1px solid var(--line);vertical-align:top}
th{background:rgba(127,127,127,.06);font-weight:600;white-space:nowrap}
tr:last-child td{border-bottom:none}
td:first-child{white-space:nowrap}
code{background:rgba(127,127,127,.12);padding:2px 6px;border-radius:5px;font-size:12.5px}
hr{border:none;border-top:1px solid var(--line);margin:34px 0}
.back{display:inline-block;margin:30px 0 0;font-size:14px}
footer{border-top:1px solid var(--line);padding:26px 0 50px;color:var(--muted);font-size:13px}
footer .wrap{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between}
.note{background:var(--panel);border:1px solid var(--line);border-radius:10px;
  padding:16px 18px;margin:0 0 22px;font-size:14px;color:var(--muted)}
.srclist{display:flex;flex-wrap:wrap;gap:6px}
.srclist span{border:1px solid var(--line);border-radius:6px;padding:2px 8px;font-size:12px}