:root{
  --bg:#fbfbfd; --panel:#ffffff; --ink:#16171c; --muted:#646b7a; --line:#e7e9ef;
  --accent:#3b5bdb; --accent-2:#2f49b0; --soft:#eef2ff; --warm:#e8590c;
  --radius:14px; --shadow:0 1px 2px rgba(16,24,40,.04),0 8px 24px -12px rgba(16,24,40,.18);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);
  font-family:system-ui,-apple-system,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.wrap{width:100%;max-width:1080px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;border-radius:8px;z-index:9;box-shadow:var(--shadow)}

/* header */
.hd{position:sticky;top:0;z-index:20;background:rgba(251,251,253,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.hd-in{display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;letter-spacing:.2px;white-space:nowrap}
.brand svg{width:26px;height:26px;flex:none}
.nav{display:flex;gap:4px;overflow-x:auto;scrollbar-width:none}
.nav::-webkit-scrollbar{display:none}
.nav a{padding:7px 11px;border-radius:9px;color:var(--muted);font-size:14.5px;white-space:nowrap}
.nav a:hover{background:var(--soft);color:var(--accent-2)}
.nav a.on{background:var(--soft);color:var(--accent-2);font-weight:600}

/* hero */
.hero{padding:56px 0 40px;border-bottom:1px solid var(--line);background:
  radial-gradient(900px 260px at 12% -40%,#e9eeff 0%,rgba(255,255,255,0) 70%),
  radial-gradient(700px 220px at 92% 0%,#fff1e8 0%,rgba(255,255,255,0) 70%)}
.kicker{margin:0 0 10px;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--accent);font-weight:700}
.hero h1{margin:0 0 14px;font-size:clamp(26px,4.2vw,40px);line-height:1.25;letter-spacing:-.5px;max-width:20em}
.hero .sub{margin:0;color:var(--muted);font-size:17px;max-width:36em}
.hero-links{display:flex;gap:12px;margin-top:26px;flex-wrap:wrap}
.btn{display:inline-block;padding:11px 20px;border-radius:10px;background:var(--accent);color:#fff;font-weight:600;font-size:15px;border:1px solid transparent}
.btn:hover{background:var(--accent-2)}
.btn.ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn.ghost:hover{border-color:#c9cfe0;background:#fff}

/* sections */
.sec{padding:44px 0}
.sec + .sec{border-top:1px solid var(--line)}
.sec-hd{display:flex;align-items:baseline;justify-content:space-between;gap:16px;margin-bottom:22px}
.sec-hd h2{margin:0;font-size:22px;letter-spacing:-.2px}
.sec-hd a{color:var(--accent-2);font-size:14.5px;font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:18px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .15s ease,border-color .15s ease}
.card:hover{transform:translateY(-2px);border-color:#cfd6ea}
.card-link{display:flex;flex-direction:column;height:100%;padding:20px}
.card-top{display:flex;align-items:center;gap:10px;margin-bottom:12px;font-size:12.5px;color:var(--muted)}
.cat{background:var(--soft);color:var(--accent-2);padding:2px 9px;border-radius:999px;font-weight:600}
.card h3{margin:0 0 8px;font-size:17.5px;line-height:1.45;letter-spacing:-.1px}
.card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7;
  display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card .more{margin-top:14px;font-size:13px;color:var(--accent-2);font-weight:600}
.card.hot{display:flex;gap:14px;padding:14px 18px;align-items:flex-start}
.rank{font:700 15px/1.6 ui-monospace,SFMono-Regular,Menlo,monospace;color:var(--accent);min-width:22px}
.card.hot h3{font-size:15.5px;margin:0}
.card.hot .meta{font-size:12.5px;color:var(--muted);margin-top:4px}

/* article */
.post-hd{padding:44px 0 26px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:18px}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0}
.crumbs li+li:before{content:"/";margin-right:6px;color:#c3c8d6}
.crumbs a:hover{color:var(--accent-2)}
.post-hd h1{margin:0 0 14px;font-size:clamp(26px,4vw,38px);line-height:1.3;letter-spacing:-.6px}
.post-meta{display:flex;flex-wrap:wrap;gap:14px;color:var(--muted);font-size:13.5px}
.post-body{padding:8px 0 40px;max-width:760px}
.prose{font-size:17px;line-height:1.9;color:#24262d}
.prose h2{font-size:23px;margin:38px 0 14px;line-height:1.4;letter-spacing:-.3px;padding-left:12px;border-left:4px solid var(--accent);border-radius:2px}
.prose h3{font-size:19px;margin:28px 0 10px}
.prose p{margin:0 0 18px}
.prose ul,.prose ol{margin:0 0 18px;padding-left:1.4em}
.prose li{margin:6px 0}
.prose a{color:var(--accent-2);text-decoration:underline;text-underline-offset:3px}
.prose blockquote{margin:0 0 18px;padding:14px 18px;background:var(--soft);border-left:3px solid var(--accent);border-radius:0 8px 8px 0;color:#333a4d}
.prose blockquote p:last-child{margin:0}
.prose code{background:#f2f4f9;padding:2px 6px;border-radius:5px;font-size:.9em}
.prose pre{background:#16181f;color:#e6e9f2;padding:16px 18px;border-radius:10px;overflow:auto;font-size:14px;line-height:1.7}
.prose pre code{background:none;padding:0;color:inherit}
.prose img{border-radius:10px;margin:8px 0 18px}
.prose hr{border:0;border-top:1px solid var(--line);margin:32px 0}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:8px 0 0}
.tags span{font-size:12.5px;color:var(--muted);background:#f2f4f9;padding:3px 10px;border-radius:999px}

/* list page */
.list-hd{padding:42px 0 22px;border-bottom:1px solid var(--line);margin-bottom:28px}
.list-hd h1{margin:0 0 10px;font-size:32px;letter-spacing:-.5px}
.list-hd p{margin:0;color:var(--muted);max-width:42em}
.rows{display:flex;flex-direction:column;gap:0;margin:0 0 40px}
.row{display:flex;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:flex-start}
.row h3{margin:0 0 6px;font-size:18px}
.row p{margin:0;color:var(--muted);font-size:14px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.row .meta{font-size:12.5px;color:var(--muted);margin-top:8px;display:flex;gap:12px}
.row .idx{font:700 13px/1.6 ui-monospace,monospace;color:#b7bdcc;min-width:26px;padding-top:3px}
.pager{display:flex;gap:10px;justify-content:center;padding:8px 0 50px}
.pager a,.pager span{padding:8px 14px;border:1px solid var(--line);border-radius:9px;background:#fff;font-size:14px}
.pager .cur{background:var(--accent);color:#fff;border-color:var(--accent)}

/* footer */
.ft{margin-top:20px;border-top:1px solid var(--line);background:#fff}
.ft-in{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:26px;padding:40px 0 26px}
.ft h4{margin:0 0 12px;font-size:14px;letter-spacing:.04em;color:var(--ink)}
.ft ul{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:8px}
.ft li a,.ft p{margin:0;color:var(--muted);font-size:14px}
.ft li a:hover{color:var(--accent-2)}
.ft-bot{border-top:1px solid var(--line);padding:18px 0 30px;color:var(--muted);font-size:13px}
.ft-bot p{margin:4px 0}
.disc{color:#8b91a1}

@media (max-width:720px){
  .hero{padding:36px 0 28px}
  .sec{padding:32px 0}
  .post-hd{padding:28px 0 18px}
  .nav a{padding:7px 9px;font-size:14px}
  .brand span{display:none}
  .prose{font-size:16.5px}
  .grid{grid-template-columns:1fr}
}