.install-fab{position:fixed;left:18px;bottom:calc(22px + env(safe-area-inset-bottom,0px));z-index:8;display:inline-flex;align-items:center;gap:8px;padding:13px 20px;min-height:44px;border:0;border-radius:999px;background:#183848;color:#fff;font-family:inherit;font-size:14px;font-weight:700;line-height:1.3;box-shadow:0 8px 24px #18384830;cursor:pointer}
.install-fab:hover{background:#264d60}
.install-fab:focus-visible{outline:3px solid #b99c61;outline-offset:4px}
.install-fab svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.install-fab[hidden]{display:none}
body:has(.install-fab:not([hidden])){padding-bottom:90px}
#install-guide{max-width:510px}
#install-guide .install-lead{font-weight:600;color:#183848}
#install-guide p,#install-guide li{font-size:14px;line-height:1.8}
#install-guide ol{padding-left:24px}
#install-guide li+li{margin-top:12px}
#install-guide .install-note{padding-top:14px;border-top:1px solid #e2e6dc;font-size:13px;color:#526476;overflow-wrap:anywhere}
@media(max-width:480px){.install-fab{left:12px;bottom:calc(16px + env(safe-area-inset-bottom,0px));padding:11px 16px;font-size:13px}}