*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  color: #1a1a1a;
  background: #fff;
  font: 15px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    "PingFang SC", "Microsoft YaHei", sans-serif;
}
header {
  position: sticky;
  top: 0;
  z-index: 10;
  padding: 15px 20px 12px;
  background: #fff;
  border-bottom: 1px solid #eee;
}
h1 { margin: 0; font-size: 18px; line-height: 1.4; text-align: center; }
main { padding: 16px 20px 36px; }
article { max-width: 1100px; margin: 0 auto; word-break: break-word; }
article p, article div { margin: 0 0 .75em; }
article h1, article h2, article h3, article h4, article h5, article h6 {
  margin: 1.2em 0 .6em;
  line-height: 1.4;
}
article ul, article ol { margin: 0 0 .75em; padding-left: 1.6em; }
article table { width: 100%; border-collapse: collapse; }
article th, article td { padding: 8px 10px; border: 1px solid #ddd; }
article img { max-width: 100%; height: auto; }
article a { color: #1677ff; text-decoration: underline; cursor: pointer; }
.state { min-height: 60vh; display: grid; place-items: center; color: #666; }
.error { color: #c62828; }
[hidden] { display: none !important; }
@media (max-width: 640px) {
  body { font-size: 14px; }
  header { padding: 13px 14px 10px; }
  main { padding: 14px 14px 28px; }
}