:root{--ink:#111827;--muted:#64748b;--line:#e2e8f0;--soft:#f8fafc;--brand:#0f172a;--accent:#2563eb;--warm:#f59e0b;--radius:22px;--shadow:0 18px 45px rgba(15,23,42,.08)}
*{box-sizing:border-box}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.7}a{color:inherit;text-decoration:none}img,video{max-width:100%;display:block}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.topbar{max-width:1180px;margin:auto;padding:16px 20px 10px;display:flex;gap:18px;align-items:center;justify-content:space-between}.brand-logo,.footer-logo{font-weight:900;font-size:30px;letter-spacing:.03em}.brand-logo{display:flex;align-items:baseline;gap:10px}.brand-logo small{font-size:13px;color:var(--muted);font-weight:700}.domain-chip{font-size:14px;padding:8px 12px;border:1px solid var(--line);border-radius:999px;background:var(--soft);color:var(--muted)}.primary-nav{max-width:1180px;margin:auto;padding:0 20px 14px;display:flex;gap:10px;overflow:auto}.primary-nav 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figure{position:relative;margin:0;background:#e2e8f0;aspect-ratio:16/9;overflow:hidden}.poster-video{width:100%;height:100%;object-fit:cover;background:#e2e8f0}.play-badge{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) scale(.92);width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:rgba(15,23,42,.78);color:#fff;font-size:26px;opacity:.0;transition:.2s ease}.video-card:hover .play-badge,.video-card:focus-within .play-badge{opacity:1;transform:translate(-50%,-50%) scale(1)}figcaption{position:absolute;left:12px;right:12px;bottom:10px;background:rgba(15,23,42,.68);color:#fff;border-radius:12px;padding:6px 10px;font-size:12px}.stats,.tags{display:flex;flex-wrap:wrap;gap:8px}.stats span,.tags span,.tag{font-size:13px;border-radius:999px;background:#f1f5f9;color:#475569;padding:5px 9px}.highlight{background:#0f172a;color:#fff;border-radius:28px;padding:28px}.highlight p,.highlight .eyebrow{color:#e2e8f0}.highlight 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