:root{color:#24364a;background:#f4f7fb;font-family:Microsoft YaHei,sans-serif}body{margin:0}main{max-width:720px;margin:12vh auto;padding:32px}.brand{color:#486584;font-size:14px}h1{margin:16px 0;font-size:32px}h2{font-size:18px}p{color:#52667c;line-height:1.8}section{border-top:1px solid #ccd8e5;margin-top:32px;padding-top:32px}button{color:#fff;font:inherit;cursor:pointer;background:#245e99;border:0;border-radius:8px;padding:12px 20px}button:disabled{opacity:.65;cursor:wait}button:focus-visible{outline-offset:3px;outline:3px solid #7caddd}