:root{font-family:"Microsoft YaHei UI","Microsoft YaHei",system-ui,sans-serif;color:#233047;background:#f5f6fa;font-size:14px;color-scheme:light}
*{box-sizing:border-box}
body{min-width:320px;min-height:100vh;margin:0;padding:16px;display:grid;place-items:center}
.card{width:min(420px,100%);padding:28px 24px 20px;background:#fff;border:1px solid #dce3ee;border-radius:8px}
.brand{display:flex;align-items:center;gap:9px;font-size:18px;font-weight:600;margin-bottom:25px}
.brand img{display:block}
h1{font-size:24px;line-height:1.4;margin:0 0 9px;font-weight:600}
p{line-height:1.7;margin:0 0 20px;color:#65748c}
#challenge{min-height:68px;width:100%}
.status{min-height:24px;margin:16px 0 0;color:#53627a;overflow-wrap:anywhere}
.status[data-state="success"]{color:#247749}
.status[data-state="error"]{color:#9c4f10}
.note{font-size:12px;margin:24px 0 0}
button{font:inherit;color:#3467e8;background:#fff;border:1px solid #dce3ee;border-radius:6px;min-height:40px;padding:8px 14px;margin-top:12px;cursor:pointer}
button:hover{background:#f0f4ff}
button:focus-visible{outline:2px solid #3467e8;outline-offset:2px}
[hidden]{display:none!important}
@media(max-width:400px){.card{padding:24px 16px 16px}}
@media(max-width:360px){body{padding:8px;background:#fff}.card{padding:20px 0;border:0}}