.echo-install-root{--echo-install-teal:#087f83;--echo-install-ink:#123b40;--echo-install-muted:#5d7275;font-family:Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--echo-install-ink);font-size:14px;line-height:1.6}
.echo-install-root [hidden]{display:none!important}
.echo-install-root button{box-sizing:border-box;min-height:44px;min-width:44px;cursor:pointer;font:inherit;letter-spacing:normal;text-transform:none;touch-action:manipulation}
.echo-install-root button:focus-visible{outline:3px solid #3dadae;outline-offset:3px}
.echo-install-root button:disabled{opacity:.6;cursor:wait}
.echo-install-banner{position:fixed;z-index:1100;right:24px;bottom:var(--echo-install-bottom,24px);display:flex;align-items:flex-start;gap:14px;box-sizing:border-box;width:356px;max-width:calc(100vw - 32px);padding:20px 50px 20px 20px;border:1px solid #c2dfdc;border-radius:22px;background:#fff;box-shadow:0 14px 48px #103e4026;text-align:left}
.echo-install-icon,.echo-install-guide-icon{display:block;flex:none;border-radius:14px;object-fit:contain;background:#eaf8f5}
.echo-install-banner-copy{min-width:0}
.echo-install-banner-copy strong{display:block;margin:0;font-size:16px;font-weight:750;line-height:1.4}
.echo-install-banner-copy p{margin:5px 0 13px;color:var(--echo-install-muted);font-size:13px;line-height:1.6}
.echo-install-root .echo-install-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 17px;border:1px solid var(--echo-install-teal);border-radius:12px;background:var(--echo-install-teal);color:#fff;font-weight:700;line-height:1.45;box-shadow:none;text-decoration:none;white-space:normal}
.echo-install-root .echo-install-primary:hover:not(:disabled){background:#05696d;border-color:#05696d}
.echo-install-root .echo-install-close{position:absolute;top:8px;right:8px;display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;padding:0;border:0;border-radius:12px;background:transparent;color:#526c70;font-size:27px;font-weight:400;line-height:1;box-shadow:none}
.echo-install-root .echo-install-close:hover{background:#edf6f4}
.echo-install-dialog{position:fixed;inset:0;box-sizing:border-box;width:min(480px,calc(100vw - 32px));max-width:480px;max-height:calc(100vh - 40px);max-height:calc(100dvh - 40px);margin:auto;padding:30px;border:1px solid #cee5e0;border-radius:26px;background:#fff;color:var(--echo-install-ink);font-family:inherit;text-align:left;overflow-y:auto;overscroll-behavior:contain;box-shadow:0 24px 80px #0b34393b;z-index:1201}
.echo-install-dialog:not([open]){display:none}
.echo-install-dialog::backdrop{background:#0a2e3c66;backdrop-filter:blur(3px)}
.echo-install-shade{position:fixed;inset:0;background:#0a2e3c66;backdrop-filter:blur(3px);z-index:1200}
.echo-install-guide-icon{margin-bottom:20px}
.echo-install-dialog .echo-install-eyebrow{margin:0 0 7px;color:var(--echo-install-teal);font-size:11px;font-weight:750;letter-spacing:1.4px;line-height:1.6}
.echo-install-dialog h2{margin:0 38px 9px 0;color:var(--echo-install-ink);font-family:inherit;font-size:25px;font-weight:800;line-height:1.4;letter-spacing:-.5px}
.echo-install-dialog .echo-install-description{margin:0 0 22px;color:var(--echo-install-muted);font-size:14px;line-height:1.75}
.echo-install-steps{display:grid;gap:14px;margin:0 0 24px;padding:0;list-style:none;counter-reset:echo-install-step}
.echo-install-steps li{position:relative;min-height:32px;margin:0;padding:3px 0 0 43px;counter-increment:echo-install-step;color:#254e53;font-size:14px;line-height:1.75}
.echo-install-steps li::before{position:absolute;left:0;top:0;display:flex;align-items:center;justify-content:center;width:30px;height:30px;border:1px solid #cee7e1;border-radius:10px;background:#f0faf7;color:var(--echo-install-teal);content:counter(echo-install-step);font-size:13px;font-weight:750;line-height:1}
.echo-install-root .echo-install-native{width:100%;min-height:48px}
.echo-install-dialog .echo-install-status{margin:13px 0 0;color:#35666b;font-size:13px;line-height:1.7}
.echo-install-status:empty{display:none}
.echo-install-dialog .echo-install-note{margin:18px 0 0;padding-top:16px;border-top:1px solid #e5eeeb;color:#718185;font-size:12px;line-height:1.7}
@media(max-width:680px){.echo-install-banner{top:calc(env(safe-area-inset-top,0px) + 12px);right:12px;bottom:auto;left:12px;width:auto;max-width:none;gap:12px;padding:16px 46px 16px 16px;border-radius:19px;box-shadow:0 8px 32px #103e4026}.echo-install-banner-copy p{margin-bottom:9px}.echo-install-icon{width:44px;height:44px}.echo-install-root .echo-install-primary{padding:9px 15px;font-size:13px}.echo-install-dialog{width:calc(100vw - 24px);max-height:calc(100vh - 24px);max-height:calc(100dvh - env(safe-area-inset-top,0px) - env(safe-area-inset-bottom,0px) - 24px);padding:26px 23px;border-radius:23px}.echo-install-dialog h2{font-size:23px}.echo-install-guide-icon{width:56px;height:56px}.echo-install-root .echo-install-native{font-size:14px}}
@media(prefers-reduced-motion:no-preference){.echo-install-root .echo-install-primary,.echo-install-root .echo-install-close{transition:background .15s ease,border-color .15s ease}}