:root{
  --bg:#0f1115;
  --bg-soft:#161a21;
  --card:#1b2028;
  --line:#2a313c;
  --text:#e6e9ef;
  --muted:#9aa4b2;
  --brand:#4f8cff;
  --brand-soft:#2a4a8a;
  --radius:14px;
  --maxw:880px;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--text);
  font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* header */
.site-header{
  position:sticky;top:0;z-index:20;
  background:rgba(15,17,21,.85);backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;min-height:62px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-weight:700;font-size:18px}
.brand:hover{text-decoration:none}
.brand-mark{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:10px;font-size:14px;letter-spacing:.5px;
  background:linear-gradient(135deg,var(--brand),#7b5cff);color:#fff;font-weight:800;
}
.site-nav{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.site-nav a{
  padding:6px 12px;border-radius:999px;color:var(--muted);font-size:14px;
  transition:.18s;
}
.site-nav a:hover{background:var(--bg-soft);color:var(--text);text-decoration:none}
.site-nav a.active{background:var(--brand-soft);color:#fff}
.site-nav a.nav-home{border:1px solid var(--line)}

/* list */
main{padding:28px 0 40px;min-height:50vh}
.page-head{margin:4px 0 22px}
.page-head h1{margin:0 0 6px;font-size:26px}
.page-head p{margin:0;color:var(--muted);font-size:14px}

.post-list{list-style:none;margin:0;padding:0;display:grid;gap:14px}
.post-item{
  background:var(--card);border:1px solid var(--line);border-radius:var(--radius);
  padding:20px 22px;transition:.18s;
}
.post-item:hover{border-color:var(--brand-soft);transform:translateY(-2px)}
.post-item h2{margin:0 0 8px;font-size:20px;line-height:1.4}
.post-item h2 a{color:var(--text)}
.post-item h2 a:hover{color:var(--brand);text-decoration:none}
.post-item .summary{color:var(--muted);margin:0 0 12px;font-size:15px}
.meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:13px}
.meta .cat{color:var(--brand)}
.tag{
  display:inline-block;padding:1px 9px;margin-right:6px;border-radius:999px;
  background:var(--bg-soft);border:1px solid var(--line);color:var(--muted);font-size:12px;
}

/* article */
.article{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px}
.article h1{margin:0 0 10px;font-size:26px;line-height:1.35}
.article .article-meta{color:var(--muted);font-size:13px;margin-bottom:22px;display:flex;flex-wrap:wrap;gap:14px}
.article .content{font-size:16px;line-height:1.85;word-wrap:break-word;overflow-wrap:break-word}
.article .content h2,.article .content h3{margin:1.4em 0 .6em}
.article .content img{max-width:100%;height:auto;border-radius:10px}
.article .content pre{
  background:#0b0d11;border:1px solid var(--line);border-radius:10px;
  padding:14px 16px;overflow:auto;font-size:14px;
}
.article .content code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.92em}
.article .content :not(pre) > code{background:#0b0d11;padding:2px 6px;border-radius:6px}
.article .content blockquote{
  margin:1em 0;padding:10px 16px;border-left:3px solid var(--brand);
  background:var(--bg-soft);color:var(--muted);border-radius:0 8px 8px 0;
}
.back-link{display:inline-block;margin-top:24px;color:var(--muted);font-size:14px}

/* empty / pager */
.empty{
  text-align:center;color:var(--muted);padding:60px 20px;
  background:var(--card);border:1px dashed var(--line);border-radius:var(--radius);
}
.pager{display:flex;justify-content:center;gap:8px;margin-top:26px}
.pager a,.pager span{
  padding:7px 14px;border-radius:10px;border:1px solid var(--line);
  color:var(--muted);font-size:14px;
}
.pager a:hover{background:var(--bg-soft);color:var(--text);text-decoration:none}
.pager .cur{background:var(--brand-soft);color:#fff;border-color:var(--brand-soft)}

/* footer */
.site-footer{border-top:1px solid var(--line);color:var(--muted);font-size:13px;padding:22px 0}
.footer-inner{display:flex;flex-wrap:wrap;justify-content:space-between;gap:10px}
.footer-inner p{margin:0}
.footer-links a{color:var(--muted)}
.footer-links a:hover{color:var(--brand)}

@media (max-width:560px){
  .header-inner{min-height:auto;padding:10px 0;flex-direction:column;align-items:flex-start}
  .article{padding:20px 18px}
  .page-head h1{font-size:22px}
  .post-item{padding:16px 16px}
}