:root{font-family:system-ui,-apple-system,Microsoft YaHei,sans-serif;color:#192438;background:#f2f5fc}*{box-sizing:border-box}body{margin:0}header{display:flex;gap:16px;align-items:center;justify-content:space-between;background:#fff;border-bottom:1px solid #ddd;padding:16px max(20px,calc((100vw - 1000px)/2))}main{max-width:1000px;margin:25px auto;padding:0 18px}.login{max-width:480px;margin:12vh auto}section,form{background:#fff;border:1px solid #e1e6f0;border-radius:16px;padding:22px;margin:16px 0;box-shadow:0 4px 18px #1b2a5210}label{display:block;margin:12px 0;font-weight:600}input:not([type=checkbox]),select{display:block;width:100%;padding:12px;border:1px solid #cbd4e5;border-radius:9px;margin-top:6px;font:inherit}button{border:0;background:#3157d5;color:#fff;border-radius:9px;padding:11px 15px;cursor:pointer;margin:5px 7px 5px 0}button:disabled{opacity:.45;cursor:not-allowed}.passage{font:20px/1.9 Georgia,serif;white-space:pre-wrap}#preview{max-height:160px;overflow:auto;white-space:pre-wrap;background:#f6f8fd;padding:12px;border-radius:8px}.result{padding:12px;border-bottom:1px solid #eee}#message{color:#b63a3a;min-height:22px}@media(max-width:600px){header{flex-wrap:wrap}h1{font-size:24px}section{padding:15px}.passage{font-size:18px}}