:root{--brand:#caa66a;--bg:#ffffff;--ink:#222;--muted:#666}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{font-family:system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6}
a{color:inherit;text-decoration:none}
.container{max-width:1080px;margin:0 auto;padding:16px}
header.site{position:sticky;top:0;background:#fff;z-index:50;border-bottom:1px solid #eee}
.nav{display:flex;gap:1rem;align-items:center;justify-content:space-between;padding:12px 16px}
.logo{font-weight:700;letter-spacing:.2px}
.navlinks{display:flex;gap:12px;flex-wrap:wrap}
.navlinks a{padding:8px 10px;border-radius:10px}
.navlinks a:hover{background:#f6f6f6;color:#111}
.hero{padding:40px 16px;background:linear-gradient(180deg,#fff,#f9f7f3)}
.hero h1{margin:0 0 10px 0;font-size:28px}
.cta{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.btn{display:inline-block;padding:10px 14px;border-radius:10px;background:var(--brand);color:#fff}
.btn.secondary{background:#111;color:#fff}
.grid{display:grid;gap:16px}
.grid.cards{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card{border:1px solid #eee;border-radius:14px;padding:16px;background:#fff}
.card h3{margin-top:0}
.video{position:relative;padding-top:56.25%;border-radius:12px;overflow:hidden;border:1px solid #eee;background:#000}
.video iframe{position:absolute;top:0;left:0;width:100%;height:100%}
footer{padding:28px 16px;border-top:1px solid #eee;color:var(--muted);background:#fff;margin-top:32px}
.badge{font-size:12px;padding:2px 8px;border-radius:999px;background:#f0f0f0;color:#333;display:inline-block;margin-left:8px}
.tag{font-size:12px;padding:4px 8px;border-radius:999px;border:1px solid #ddd}
.cards .meta{color:#777;font-size:14px}
@media (min-width: 720px){.hero h1{font-size:34px}}

/* Right ad rail — v5: 160px wide (skyscraper) */
#ad-rail{display:none}
@media (min-width:1200px){
  #ad-rail{display:block}
  .ad-rail{position:fixed; top:96px; right:16px; width:160px; z-index:40}
  body{padding-right:188px} /* 160 + 16 + 12余量 */
}
.ad-rail .ad-box{width:100%;}
.ad-rail .ad-note{font-size:12px;color:#777;margin-top:6px}