.rf-back-top{position:fixed;right:max(24px,env(safe-area-inset-right,0px));bottom:max(24px,env(safe-area-inset-bottom,0px));z-index:70;display:flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:12px 16px;border:1px solid #263548;border-radius:8px;background:#111a27;color:#fff;font-family:inherit;font-size:13px;font-weight:600;line-height:1.2;cursor:pointer}.rf-back-top[hidden]{display:none}.rf-back-top:hover{background:#2163e8}.rf-back-top:focus-visible{outline:3px solid #3479ff;outline-offset:4px}@media(max-width:600px){.rf-back-top{right:max(16px,env(safe-area-inset-right,0px));bottom:max(16px,env(safe-area-inset-bottom,0px));width:44px;height:44px;padding:0;border-radius:50%}.rf-back-top span:last-child{position:absolute;width:1px;height:1px;clip-path:inset(50%);overflow:hidden;white-space:nowrap}}