body{font:16px/1.6 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;margin:0 auto;max-width:40rem;padding:1rem;color:#1d1d1f}
h1{font-size:1.4rem}h2{font-size:1.1rem;margin-top:2rem}
label{display:block;margin:.8rem 0 .3rem}select,input[type=text]{font:inherit;width:100%;padding:.5rem;box-sizing:border-box}
.check{display:flex;gap:.5rem;align-items:flex-start}.check input{margin-top:.35rem}
button{font:inherit;margin-top:1.2rem;padding:.6rem 1.4rem}
#result{margin-top:1rem;padding:.8rem;background:#f2f2f4;border-radius:6px}
#result dt{font-weight:600}#result dd{margin:0 0 .4rem;font-family:ui-monospace,monospace;word-break:break-all}
.note{color:#555;font-size:.92rem}code{font-family:ui-monospace,monospace}