:root{
  --bg:#0d1117; --bg2:#161b22; --card:#161b22; --line:#30363d;
  --fg:#e6edf3; --muted:#8b949e; --accent:#58a6ff; --accent2:#3fb950;
  --code-bg:#0d1117; --tag:#1f6feb;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;line-height:1.75;font-size:16px}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:960px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:rgba(13,17,23,.9);position:sticky;top:0;z-index:10;backdrop-filter:blur(6px)}
header.site .wrap{display:flex;align-items:center;gap:26px;height:60px}
.logo{font-size:20px;font-weight:700;color:var(--fg)}
.logo span{color:var(--accent2)}
nav.main{display:flex;gap:20px;margin-left:auto}
nav.main a{color:var(--muted);font-size:15px}
nav.main a:hover{color:var(--fg);text-decoration:none}
.hero{padding:64px 0 40px;background:radial-gradient(600px 300px at 20% 0%,rgba(31,111,235,.18),transparent),radial-gradient(500px 260px at 85% 10%,rgba(63,185,80,.12),transparent)}
.hero h1{font-size:40px;line-height:1.25;margin-bottom:14px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero p{color:var(--muted);font-size:17px;max-width:640px}
.hero .term{margin-top:28px;background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:16px 18px;font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:14px;color:#a5d6ff;overflow-x:auto}
.hero .term .c{color:var(--muted)}
section{padding:36px 0}
h2.sec{font-size:24px;margin-bottom:18px}
.filters{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px}
.filters button{background:var(--bg2);border:1px solid var(--line);color:var(--muted);padding:6px 16px;border-radius:999px;cursor:pointer;font-size:14px}
.filters button.on{background:var(--tag);border-color:var(--tag);color:#fff}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:22px;display:flex;flex-direction:column;gap:10px;transition:border-color .2s,transform .2s}
.card:hover{border-color:var(--accent);transform:translateY(-2px)}
.card .tag{align-self:flex-start;background:rgba(31,111,235,.15);color:var(--accent);font-size:12px;padding:2px 10px;border-radius:999px}
.card h3{font-size:18px;line-height:1.45}
.card h3 a{color:var(--fg)}
.card p{color:var(--muted);font-size:14px;flex:1}
.card .meta{color:var(--muted);font-size:13px;border-top:1px solid var(--line);padding-top:10px}
.about{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:26px}
.about p{color:var(--muted)}
footer.site{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px;margin-top:20px}
/* article */
article.post{padding:40px 0 10px}
article.post h1{font-size:32px;line-height:1.35;margin:12px 0 10px}
article.post .meta{color:var(--muted);font-size:14px;margin-bottom:26px}
article.post h2{font-size:23px;margin:34px 0 12px;padding-bottom:6px;border-bottom:1px solid var(--line)}
article.post h3{font-size:18px;margin:24px 0 8px}
article.post p{margin:12px 0}
article.post ul,article.post ol{margin:12px 0 12px 22px}
article.post li{margin:5px 0}
article.post code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;background:rgba(110,118,129,.22);padding:1px 6px;border-radius:5px;font-size:.92em}
.codeblock{position:relative;margin:16px 0}
.codeblock pre{background:var(--code-bg);border:1px solid var(--line);border-radius:10px;padding:16px 18px;overflow-x:auto}
.codeblock pre code{background:none;padding:0;font-size:14px;line-height:1.65;color:#e6edf3}
.codeblock .copy{position:absolute;top:8px;right:8px;background:var(--bg2);border:1px solid var(--line);color:var(--muted);border-radius:6px;padding:3px 10px;font-size:12px;cursor:pointer}
.codeblock .copy:hover{color:var(--fg)}
.note{border-left:3px solid var(--accent);background:rgba(31,111,235,.08);padding:12px 16px;border-radius:0 8px 8px 0;margin:16px 0;color:#c9d1d9}
.warn{border-left-color:#d29922;background:rgba(210,153,34,.08)}
table{border-collapse:collapse;width:100%;margin:16px 0;font-size:14.5px}
th,td{border:1px solid var(--line);padding:8px 12px;text-align:left}
th{background:var(--bg2)}
.pager{display:flex;justify-content:space-between;gap:14px;margin:36px 0 8px}
.pager a{background:var(--bg2);border:1px solid var(--line);border-radius:10px;padding:12px 16px;flex:1;color:var(--fg);font-size:14px}
.pager a:hover{border-color:var(--accent);text-decoration:none}
.pager .dir{color:var(--muted);font-size:12px;display:block}
@media (max-width:640px){.hero h1{font-size:30px}article.post h1{font-size:26px}}