#backExitHint{position:fixed;left:50%;bottom:82px;z-index:120;transform:translate(-50%,12px);opacity:0;pointer-events:none;background:#1c1917;color:#fff;border-radius:999px;padding:10px 16px;font-weight:800;font-size:.85rem;box-shadow:0 8px 24px #0004;transition:.18s}#backExitHint.show{opacity:1;transform:translate(-50%,0)}