:root{--blue:#2563eb;--blue-d:#1d4ed8;--navy:#0f172a;--ink:#1e293b;--muted:#64748b;--line:#e2e8f0;--bg:#fff;--soft:#f8fafc}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:17px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Inter,Roboto,Helvetica,Arial,sans-serif}
a{color:var(--blue)}
.wrap{max-width:760px;margin:0 auto;padding:0 20px}
header.site{border-bottom:1px solid var(--line);background:#fff}
header.site .wrap{max-width:1080px;display:flex;align-items:center;justify-content:space-between;height:64px;gap:16px}
.brand{font-weight:800;font-size:19px;color:var(--navy);text-decoration:none;letter-spacing:-.01em}
.brand span{color:var(--blue)}
nav.top{display:flex;align-items:center;gap:18px;font-size:15px}
nav.top a{color:var(--ink);text-decoration:none}
.btn{display:inline-block;background:var(--blue);color:#fff!important;text-decoration:none;font-weight:600;border-radius:10px;padding:10px 18px;font-size:15px;line-height:1.3}
.btn:hover{background:var(--blue-d)}
.hero{background:var(--navy);color:#e2e8f0;padding:56px 0 48px}
.hero h1{color:#fff;font-size:38px;line-height:1.2;margin:0 0 12px;letter-spacing:-.02em}
.hero p{margin:0;color:#cbd5e1;font-size:18px}
.list{padding:40px 0 64px}
.card{display:grid;grid-template-columns:220px 1fr;gap:22px;padding:24px 0;border-bottom:1px solid var(--line);text-decoration:none;color:inherit}
.card img{width:100%;aspect-ratio:16/10;object-fit:cover;border-radius:12px;background:var(--soft)}
.card h2{font-size:22px;line-height:1.3;margin:0 0 8px;color:var(--navy)}
.card p{margin:0 0 8px;color:var(--muted);font-size:16px}
.meta{font-size:14px;color:var(--muted)}
.tag{display:inline-block;font-size:13px;color:var(--blue);font-weight:600;text-transform:uppercase;letter-spacing:.04em;margin-bottom:6px}
article.post{padding:40px 0 24px}
article.post .cover{width:100%;border-radius:14px;margin:8px 0 28px;aspect-ratio:16/9;object-fit:cover;background:var(--soft)}
article.post h1{font-size:38px;line-height:1.2;color:var(--navy);letter-spacing:-.02em;margin:8px 0 12px}
article.post h2{font-size:27px;line-height:1.3;color:var(--navy);margin:44px 0 12px;letter-spacing:-.01em}
article.post h3{font-size:21px;line-height:1.35;color:var(--navy);margin:32px 0 8px}
article.post img{max-width:100%;height:auto;border-radius:10px}
article.post table{border-collapse:collapse;width:100%;display:block;overflow-x:auto;font-size:15px;margin:20px 0}
article.post th,article.post td{border:1px solid var(--line);padding:8px 12px;text-align:left;vertical-align:top}
article.post th{background:var(--soft)}
article.post blockquote{margin:24px 0;padding:4px 20px;border-left:4px solid var(--blue);background:var(--soft);border-radius:0 8px 8px 0}
article.post pre{overflow-x:auto;background:var(--soft);padding:14px;border-radius:8px;font-size:14px}
article.post iframe{max-width:100%}
details.toc{background:var(--soft);border:1px solid var(--line);border-radius:12px;padding:12px 18px;margin:0 0 28px;font-size:15px}
details.toc summary{cursor:pointer;font-weight:600;color:var(--navy)}
details.toc ul{margin:8px 0 4px;padding-left:20px}
.cta{background:var(--navy);color:#cbd5e1;border-radius:16px;padding:32px;margin:48px 0 16px}
.cta h2{color:#fff!important;margin:0 0 8px!important;font-size:26px!important}
.cta p{margin:0 0 20px}
.related{padding:8px 0 56px}
.related h2{font-size:20px;color:var(--navy)}
.related ul{padding-left:20px}
footer.site{border-top:1px solid var(--line);padding:28px 0;color:var(--muted);font-size:14px}
footer.site .wrap{max-width:1080px;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap}
footer.site a{color:var(--muted)}
@media (max-width:640px){
  body{font-size:16px}
  .hero{padding:40px 0 36px}.hero h1,article.post h1{font-size:30px}
  article.post h2{font-size:23px}
  .card{grid-template-columns:1fr;gap:12px}
  nav.top .hide-sm{display:none}
  .cta{padding:24px}
}