.topbar{position:sticky;top:0;z-index:1000;backdrop-filter:blur(14px);background:rgba(255,255,255,.8);border-bottom:1px solid rgba(223,232,242,.85)}.nav{display:flex;align-items:center;justify-content:space-between;gap:18px;min-height:74px}.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--text);letter-spacing:.1px}.brand-mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(135deg,var(--primary) 0%,#6bb5ff 100%);display:grid;place-items:center;color:#fff;box-shadow:0 10px 24px rgba(47,111,236,.22);font-size:18px}.nav-links{display:flex;gap:18px;flex-wrap:wrap;align-items:center}.nav-links a{color:var(--muted);font-weight:600;font-size:.96rem}.meta-row{display:flex;flex-wrap:wrap;gap:12px;margin:22px 0 0}.meta-pill{display:inline-flex;align-items:center;gap:10px;padding:10px 14px;border-radius:999px;border:1px solid var(--line);background:#fff;color:var(--muted);font-weight:600;font-size:.93rem}.faq-item.active .faq-answer{display:block}.faq-item.active .faq-question span:last-child{transform:rotate(45deg)}.sidebar{position:sticky;top:96px;display:grid;gap:18px}.sidebar-card{padding:22px}.sidebar-card h3{margin:0 0 12px;font-size:1.02rem}.key-points{display:grid;gap:12px}.key-points li{list-style:none;display:flex;gap:10px;align-items:flex-start;color:#4c6280;font-size:.95rem}.small-dot{width:10px;height:10px;margin-top:8px;border-radius:50%;background:var(--primary);flex:0 0 auto}.share{display:flex;gap:10px;flex-wrap:wrap;margin-top:12px}.share a{display:inline-flex;width:40px;height:40px;border-radius:12px;border:1px solid var(--line);align-items:center;justify-content:center;color:#4d6480;background:#fff;text-decoration:none;font-weight:800}.stats-stack{display:grid;gap:12px;margin-top:12px}.stat-box{background:var(--surface-2);border:1px solid var(--line);padding:14px;border-radius:14px}.stat-box strong{display:block;font-size:1.15rem;margin-bottom:4px}@media (max-width:1080px){.sidebar{position:static}}@media (max-width:720px){.nav-links{display:none}.meta-row{gap:10px}}