.mobile-sidebar-toggle,.mobile-sidebar-close,.mobile-sidebar-overlay,.install-help-sidebar,.mobile-account-tools{display:none}
.install-banner{position:fixed;right:16px;bottom:calc(16px + env(safe-area-inset-bottom));z-index:950;display:flex;align-items:center;gap:10px;max-width:min(560px,calc(100vw - 32px));padding:12px 14px;border:1px solid #b9cdf1;border-radius:14px;background:#f5f9ff;box-shadow:0 12px 36px #183e8026;color:#233b64;font-size:13px;line-height:1.5}
.install-banner[hidden],.mobile-sidebar-overlay[hidden]{display:none!important}
.install-banner button,.install-help-actions button{min-height:40px;border:1px solid #aec5ef;border-radius:9px;background:#fff;color:#1d55c7;font-weight:700;cursor:pointer;white-space:nowrap}
.install-banner button{padding:0 10px}.install-banner #installBannerDismiss{font-size:20px}
.install-help-dialog{width:min(480px,calc(100vw - 28px));max-height:calc(100dvh - 32px);padding:24px;border:1px solid #cbdaf0;border-radius:16px;color:#233b64;box-shadow:0 20px 60px #11264c40}
.install-help-dialog::backdrop{background:#0e1d3899}.install-help-dialog h2{margin:0 0 12px;font-size:20px}.install-help-dialog p{margin:0 0 12px;line-height:1.65}.install-security-note,.activation-backup-note{color:#754b1c;font-size:13px;line-height:1.55}.install-help-actions{display:flex;justify-content:flex-end;gap:8px;margin-top:16px}.install-help-actions button{padding:0 14px}
.activation-backup-note{margin:10px 0}.activation-dialog #copyActivationCode{margin-top:8px}
@media(max-width:760px){
  .mobile-sidebar-toggle{display:flex;position:fixed;top:calc(10px + env(safe-area-inset-top));left:12px;z-index:900;align-items:center;justify-content:center;width:44px;height:44px;border:1px solid #cbd9ee;border-radius:10px;background:#fff;color:#215fe7;font-size:24px;box-shadow:0 4px 16px #183e8020}
  .mobile-sidebar-overlay:not([hidden]){display:block;position:fixed;inset:0;z-index:910;background:#071b3d8c}
  .moyuan-chat .sidebar{display:flex;position:fixed;inset:0 auto 0 0;z-index:920;width:min(86vw,340px);height:100dvh;transform:translateX(-105%);transition:transform .2s ease;overflow-y:auto;padding-top:env(safe-area-inset-top);padding-bottom:env(safe-area-inset-bottom);box-shadow:16px 0 40px #10254624}
  .moyuan-chat .sidebar.mobile-open{transform:translateX(0)}
  .mobile-sidebar-close{display:flex;align-items:center;justify-content:center;position:absolute;right:12px;top:calc(10px + env(safe-area-inset-top));width:40px;height:40px;border:0;border-radius:9px;background:#eaf1ff;color:#215fe7;font-size:27px}
  .moyuan-chat .header{padding-left:64px;min-height:64px}.moyuan-chat .header>div:first-child{min-width:0}.moyuan-chat .header h1{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
  .moyuan-chat .header-actions{min-width:0;gap:5px}.moyuan-chat .header .entitlement{max-width:105px;overflow:hidden;text-overflow:ellipsis}
  .install-help-sidebar{display:block;width:100%;margin-top:12px;padding:10px;border:1px solid #b8cef2;border-radius:9px;background:#fff;color:#215fe7;font-weight:700}
  .mobile-account-tools{display:grid;gap:8px;margin-top:12px}.mobile-account-tools button{min-height:44px;border:1px solid #b8cef2;border-radius:9px;background:#fff;color:#215fe7;font-weight:700}
  .install-banner{left:12px;right:12px;bottom:calc(12px + env(safe-area-inset-bottom));max-width:none;flex-wrap:wrap}.install-banner span{flex:1 1 100%}
}
@media(min-width:761px){.mobile-sidebar-toggle,.mobile-sidebar-close,.mobile-sidebar-overlay{display:none!important}}