:root {
  color-scheme: light;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f4f6f5;
  color: #182126;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  padding: 40px 20px;
}

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 34px;
  border: 1px solid #e1e7e4;
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 12px 36px rgba(29, 47, 41, 0.08);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
}

.brand-mark {
  display: flex;
  align-items: flex-end;
  justify-content: center;
  gap: 2px;
  width: 32px;
  height: 32px;
  padding: 8px;
  border-radius: 10px;
  background: #164b3e;
}

.brand-mark i {
  display: block;
  width: 3px;
  border-radius: 3px;
  background: #fff;
}

.brand-mark i:nth-child(1) { height: 7px; opacity: 0.65; }
.brand-mark i:nth-child(2) { height: 13px; }
.brand-mark i:nth-child(3) { height: 10px; opacity: 0.8; }

h1 {
  margin: 24px 0 4px;
  font-size: 28px;
}

h2 {
  margin: 28px 0 8px;
  font-size: 17px;
}

p,
li {
  color: #53615b;
  font-size: 14px;
  line-height: 1.75;
}

ul { padding-left: 22px; }
.updated { margin-top: 0; color: #87938d; }

@media (max-width: 560px) {
  body { padding: 0; }
  main { min-height: 100vh; padding: 24px 20px; border: 0; border-radius: 0; }
}