:root{color-scheme:light;--ink:#162f2b;--green:#245747;--muted:#68776e;--line:#dbe1d5;--paper:#f7f7ef;--white:#fffefa}
*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit}button,a{-webkit-tap-highlight-color:transparent}button{font:inherit;cursor:pointer}button:focus-visible,a:focus-visible{outline:3px solid #8ca98e;outline-offset:4px}[hidden]{display:none!important}
.brandbar{max-width:1240px;padding:26px 36px;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:20px;font-weight:750;letter-spacing:2px}.brand img{border-radius:12px}.brand small{display:block;font-size:8px;letter-spacing:4px;margin-top:3px}.back{font-size:13px;color:var(--muted);text-decoration:none}.back span{margin-left:8px}
main{max-width:1168px;margin:24px auto 0;padding:0 36px}.eyebrow{display:flex;align-items:center;gap:9px;font-size:13px;letter-spacing:2px;color:var(--green)}.eyebrow span{width:7px;height:7px;background:var(--green);border-radius:100%}h1{font-size:42px;line-height:1.3;letter-spacing:1px;margin:15px 0}h2,h3,p{margin:0}.lead{color:var(--muted);font-size:16px;line-height:1.8}.mobile-break{display:none}.layout{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(290px,1fr);gap:28px;align-items:start;margin-top:32px}.install-card{padding:26px 30px 20px;background:var(--white);border:1px solid var(--line);border-radius:22px;box-shadow:0 6px 30px #21392d05}.platforms{display:grid;grid-template-columns:1fr 1fr;gap:8px;background:#edf0e7;padding:6px;border-radius:15px}.platforms button{display:flex;align-items:center;justify-content:center;gap:10px;border:1px solid transparent;background:transparent;border-radius:11px;padding:12px;color:#637469;font-weight:650;font-size:17px;text-align:left}.platforms button[aria-selected="true"]{background:var(--white);border-color:var(--line);box-shadow:0 2px 5px #21392d08;color:var(--green)}.platforms svg{width:24px;height:27px;stroke:currentColor;fill:none;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.platforms small{display:block;font-weight:400;font-size:10px;margin-top:3px}.guide{padding-top:26px}.guide-title{display:flex;align-items:center;justify-content:space-between;gap:8px}.guide-title h2{font-size:18px}.guide-title>span{font-size:11px;color:#80907e;white-space:nowrap}.steps{list-style:none;padding:0;margin:24px 0}.steps li{display:flex;align-items:flex-start;gap:15px;padding-bottom:24px}.steps li:last-child{padding-bottom:0}.steps b{display:grid;place-items:center;flex:0 0 32px;height:32px;background:#edf1e7;border-radius:9px;color:var(--green);font-size:12px;font-weight:600}.steps strong{font-size:15px;font-weight:650;line-height:1.6}.steps p{font-size:12px;line-height:1.8;color:var(--muted);margin-top:3px}.menu-dots{font-size:19px;line-height:0}.apple-note{font-size:11px;line-height:1.8;color:var(--muted);margin-top:-7px;margin-bottom:19px}.apple-note a{display:inline-block;color:var(--green);text-underline-offset:3px}.actions{display:flex;gap:10px;margin-top:24px}.primary,.secondary{display:flex;align-items:center;justify-content:center;gap:16px;min-height:49px;padding:12px 20px;border-radius:11px;text-decoration:none;font-weight:650;font-size:14px}.primary{flex:1;background:var(--green);color:#fff;border:1px solid var(--green)}.primary:hover{background:#1b4638}.secondary{border:1px solid #cad4c5;color:var(--green);background:transparent;white-space:nowrap}.site-url{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-top:17px;font-size:11px;color:#829080}.online{display:flex;align-items:center;gap:5px;white-space:nowrap}.online i{width:5px;height:5px;border-radius:100%;background:#658d62}.status{min-height:18px;margin-top:10px;color:var(--green);font-size:12px;line-height:1.5;overflow-wrap:anywhere}.wechat-note{margin-top:18px;padding:12px;border:1px solid #e4d8af;border-radius:9px;background:#fff9e8;color:#7c6225;font-size:12px;line-height:1.8}
.side{display:grid;gap:16px}.sync-card{background:#eaf0e4;border:1px solid #dce5d2;border-radius:22px;padding:27px 26px}.sync-heading{display:flex;align-items:center;gap:14px}.sync-heading img{border-radius:14px}.sync-heading h2{font-size:21px}.sync-heading p{color:#71826c;font-size:11px;margin-top:7px}.sync-card ul{list-style:none;margin:25px 0 0;padding:0;border-top:1px solid #d6dfce}.sync-card li{display:flex;gap:12px;padding-top:21px}.sync-card li>span{display:grid;place-items:center;width:21px;height:21px;border:1px solid #b9cbb0;border-radius:100%;color:#54734a;font-size:12px;flex-shrink:0}.sync-card strong{font-size:14px;font-weight:650}.sync-card li p{font-size:11px;color:#71816b;line-height:1.9;margin-top:4px}.qr-card{display:flex;align-items:center;justify-content:center;gap:20px;background:var(--white);border:1px solid var(--line);border-radius:18px;padding:18px}.qr-card img{max-width:44%;height:auto}.qr-card h3{font-size:15px}.qr-card p{font-size:11px;color:var(--muted);line-height:1.9;margin-top:9px}.update-note{text-align:center;font-size:11px;color:#879382;line-height:1.8}footer{padding:34px 20px;text-align:center;font-size:11px;letter-spacing:1px;color:#94a08e}
@media(max-width:860px){main{margin-top:16px}.layout{gap:18px;grid-template-columns:minmax(0,1.4fr) minmax(250px,1fr)}.install-card{padding:22px}.guide-title{display:block}.guide-title>span{display:block;margin-top:7px}.sync-card{padding:24px 20px}h1{font-size:36px}.actions{flex-wrap:wrap}.primary{flex-basis:60%}.sync-heading{gap:10px}.sync-heading h2{font-size:18px}.sync-heading img{width:48px;height:48px}.qr-card{gap:12px;padding:15px}}
@media(max-width:640px){.brandbar{padding:20px 20px 14px}.brand{font-size:17px;gap:9px}.brand img{width:38px;height:38px;border-radius:10px}.brand small{font-size:6px;letter-spacing:2.5px}.back{font-size:11px}.back span{margin-left:3px}main{padding:0 20px;margin-top:20px}.eyebrow{font-size:11px;letter-spacing:1px}h1{font-size:32px;line-height:1.45;margin:13px 0}.mobile-break{display:initial}.lead{font-size:13px;line-height:1.85}.layout{grid-template-columns:1fr;margin-top:24px;gap:18px}.install-card{padding:18px 18px 12px;border-radius:18px}.platforms{gap:5px;padding:5px}.platforms button{font-size:16px;padding:11px 7px;gap:8px}.platforms small{font-size:9px}.guide{padding-top:23px}.guide-title{display:flex}.guide-title h2{font-size:16px}.guide-title>span{font-size:10px;margin:0}.steps{margin:23px 0}.steps li{gap:12px;padding-bottom:22px}.steps strong{font-size:13px}.steps p{font-size:11px;line-height:1.9}.steps b{flex-basis:28px;height:28px;font-size:11px}.actions{margin-top:22px;gap:8px}.primary,.secondary{padding:12px 14px;font-size:13px;min-height:48px}.site-url{font-size:10px;margin-top:16px}.status{font-size:11px}.sync-card{padding:22px;border-radius:18px}.sync-card ul{display:grid;gap:17px;margin-top:20px;padding-top:20px}.sync-card li{padding:0}.sync-card li p{font-size:11px}.sync-heading h2{font-size:19px}.sync-heading p{font-size:10px}.qr-card{display:none}.update-note{font-size:10px}footer{font-size:10px;padding:26px 15px 30px}.apple-note{font-size:10px}}
@media(max-width:350px){main{padding:0 12px}.brandbar{padding-left:12px;padding-right:12px}.install-card{padding:16px 14px 10px}.guide-title{display:block}.guide-title>span{margin-top:6px}.actions{gap:6px}.primary,.secondary{font-size:12px;padding:12px}.site-url{font-size:9px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important}}

/* Three device choices share one installation and account flow. */
.platforms{grid-template-columns:repeat(3,minmax(0,1fr))}
.platforms button{gap:7px;padding:12px 5px;font-size:15px;min-width:0}
.platforms small{font-size:9px;white-space:nowrap}
.platforms svg{width:21px;flex-shrink:0}
.login-help{border-top:1px solid var(--line);padding-top:18px;margin-top:12px}
.login-help strong{font-size:13px}
.login-help p{font-size:11px;color:var(--muted);line-height:1.9;margin-top:6px}
.login-help a{display:inline-block;font-size:12px;color:var(--green);margin-top:10px;text-underline-offset:3px}
.login-help .install-kind{font-size:10px;color:#879382;margin-top:13px}
@media(max-width:1000px) and (min-width:641px){.platforms svg{display:none}.platforms button{font-size:14px;justify-content:center}}
@media(max-width:640px){.platforms button{gap:5px;font-size:14px;padding:11px 3px}.platforms svg{width:18px;height:23px}.platforms small{font-size:8px}.login-help{padding-top:15px}.login-help p{font-size:11px}}
@media(max-width:350px){.platforms svg{display:none}.platforms button{justify-content:center}.platforms small{font-size:7px}}