:root{
  --bg:#ffffff; --text:#111827; --muted:#6b7280; --line:#e5e7eb;
  --brand:#111827; --chip:#f3f4f6;
}
*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--text);font-family:system-ui,-apple-system,Segoe UI,Roboto,sans-serif;line-height:1.65}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1000px;margin:0 auto;padding:18px}
.site-head{border-bottom:1px solid var(--line);position:sticky;top:0;background:#fff;z-index:5}
.brand{display:inline-flex;align-items:center;gap:8px}
.nav a{margin:0 8px;color:var(--text)}
.nav .linkbtn{padding:8px 12px;border:1px solid var(--line);border-radius:10px}
.hero{padding:22px 0 8px}
.hero h1{margin:0 0 6px}
.h2{font-size:20px;margin:14px 0}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:900px){.grid{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.grid{grid-template-columns:1fr}}
.card{border:1px solid var(--line);border-radius:14px;padding:16px;background:#fff}
.cover{width:100%;height:auto;border-radius:10px;margin-bottom:8px}
.meta{color:var(--muted);font-size:12px;margin:4px 0 8px}
.excerpt{color:#374151}
.more{font-weight:600}
.post{max-width:800px;margin:14px auto}
.post .cover.lg{width:100%;height:auto;border-radius:12px;margin:12px 0}
.post .content p{margin:0 0 14px}
.tags{margin-top:12px}
.tag{display:inline-block;background:var(--chip);padding:4px 8px;border-radius:999px;font-size:12px;color:var(--muted);margin-right:6px}
.sidebox{border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff;margin-top:14px}
.sb-title{font-weight:700;margin-bottom:6px}
.sb-list{margin:0;padding-left:18px}
.page h1{margin:6px 0 10px}
.site-foot{border-top:1px solid var(--line);margin-top:22px}
.muted{color:var(--muted);font-size:13px}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--text)}
.btn.primary{background:var(--brand);color:#fff;border-color:var(--brand)}
.cta{display:flex;gap:10px;margin-top:10px;flex-wrap:wrap}

.linkgrid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
@media (max-width:900px){.linkgrid{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.linkgrid{grid-template-columns:1fr}}
.linksec{margin:18px 0}
.linkcard{display:block;border:1px solid var(--line);border-radius:12px;padding:12px;background:#fff}
.row{display:flex;gap:10px;align-items:center}
.linkcard img{width:24px;height:24px;border-radius:6px}
.linkcard .desc{color:var(--muted);font-size:13px;margin-top:4px}