:root{--bg:#f8fafc;--card:#fff;--text:#0f172a;--muted:#64748b;--border:rgba(15,23,42,.10);--shadow:0 10px 30px rgba(15,23,42,.06)}
*{box-sizing:border-box}
body{margin:0;font-family:ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial; background:var(--bg); color:var(--text)}
a{color:#2563eb;text-decoration:none} a:hover{text-decoration:underline}
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}
.header-inner{max-width:1100px;margin:0 auto;padding:14px 16px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{font-weight:800}
nav a{margin-left:12px;color:#0f172a}
.container{max-width:1100px;margin:0 auto;padding:18px 16px}
.card{background:var(--card);border:1px solid var(--border);border-radius:16px;box-shadow:var(--shadow);padding:16px;margin:14px 0}
.small-muted{color:var(--muted);font-size:14px}
.breadcrumbs{color:var(--muted);font-size:14px;margin:10px 0}
.ad-slot{border:1px dashed rgba(15,23,42,.18);border-radius:12px;padding:12px;margin:14px 0;color:var(--muted);text-align:center;background:rgba(15,23,42,.02)}
table{width:100%;border-collapse:collapse;font-size:14px}
th,td{padding:10px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top}
h1{margin:0 0 8px 0;font-size:28px}
h2{margin:0 0 10px 0;font-size:20px}
.footer{max-width:1100px;margin:24px auto 40px auto;padding:0 16px;color:var(--muted);font-size:13px}