body{color:#17202a;background:#f4f6f8;margin:0;font:16px system-ui}main{max-width:760px;margin:32px auto;padding:24px}section{background:#fff;border-radius:12px;margin:16px 0;padding:20px;box-shadow:0 2px 10px #0000000d}button{color:#fff;background:#1677ff;border:0;border-radius:8px;margin:6px;padding:10px 16px}button:disabled{background:#aab4c0}.hint{color:#667085}pre{white-space:pre-wrap;color:#d0d5dd;background:#101828;border-radius:8px;min-height:100px;padding:14px}audio{width:100%;margin:12px 0;display:block}