:root{font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;color:#263c35;background:#f6f7f3;font-size:16px}*{box-sizing:border-box}body{margin:0}main{max-width:520px;margin:9vh auto;padding:24px}.eyebrow{font-size:14px;letter-spacing:.1em;color:#617c68}h1{font-size:clamp(28px,5vw,38px);margin:24px 0 12px}h2{font-size:20px;margin:0 0 28px}.intro,.help,.foot{color:#65756b;line-height:1.8}.intro{margin-bottom:36px}form{background:#fffefa;border:1px solid #dce3da;border-radius:14px;padding:32px}label{display:block;margin:20px 0 8px}input,button{font:inherit;width:100%;border-radius:7px;padding:13px 14px}input{border:1px solid #aab8ac;background:white;color:#263c35}button{border:0;background:#225a49;color:white;margin-top:28px;cursor:pointer}input:focus-visible,button:focus-visible{outline:3px solid #92b9a1;outline-offset:3px}.help{font-size:14px;margin:20px 0 0}.foot{font-size:13px;margin-top:24px}.error{padding:12px;background:#fff0e8;color:#863c20;border-radius:6px;line-height:1.7}@media(max-width:480px){main{margin:3vh auto;padding:24px 20px}form{padding:24px}}