:root{font-family:system-ui,-apple-system,"Microsoft YaHei",sans-serif;color:#21312e;background:#f3f5f1}*{box-sizing:border-box}body{margin:0}main{max-width:860px;margin:8vh auto;padding:24px}.eyebrow{font-size:12px;letter-spacing:2px;color:#477366}h1{font-size:42px;margin:8px 0 16px}p{line-height:1.7;color:#5b6963}section{margin-top:30px;background:white;border:1px solid #dce3dc;border-radius:20px;padding:26px}.row{display:flex;gap:12px;align-items:center;justify-content:space-between}input{font:inherit;width:100%;padding:12px;border:1px solid #cbd4ce;border-radius:10px;margin-top:10px}button{font:inherit;white-space:nowrap;background:#245e4b;color:white;border:0;border-radius:10px;padding:12px 18px;cursor:pointer}button:disabled{opacity:.5;cursor:wait}.secondary{background:#edf2ed;color:#27553d}h2{font-size:20px}.plans{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.plan{padding:18px;background:#f6f8f4;border-radius:12px}.plan strong{display:block;margin-bottom:8px}.available{color:#146d46;font-weight:700}.error{color:#ad362b}.actions{justify-content:flex-start;margin-top:24px}.hint{font-size:13px}footer{display:flex;gap:24px;justify-content:space-between;font-size:12px;margin-top:30px;color:#768078}a{color:#245e4b}label{font-size:14px}@media(max-width:600px){main{margin:20px auto;padding:18px}h1{font-size:34px}section{padding:18px}.row{flex-wrap:wrap}.plans{grid-template-columns:1fr}footer{flex-direction:column;gap:10px}}