:root { color-scheme: light; }
* { box-sizing: border-box; }
body {
  margin: 0;
  background: #f4f7fc;
  color: #0e1117;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  font-size: 16px;
  line-height: 1.62;
}
.bar {
  position: sticky;
  top: 0;
  z-index: 5;
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: saturate(180%) blur(18px);
  border-bottom: 1px solid #e6ebf2;
}
.bar-in {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 12px;
  min-height: 60px;
}
.bar a.back {
  color: #0a84ff;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
}
.bar a.back:hover { text-decoration: underline; }
.bar .brand {
  margin-left: auto;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: #0e1117;
  text-decoration: none;
}
.bar .brand img { width: 26px; height: 26px; display: block; }
.bar .brand .pro { color: #0a84ff; }
main {
  width: min(920px, calc(100% - 32px));
  margin: 32px auto;
  padding: 48px min(56px, 7vw);
  background: #ffffff;
  border: 1px solid #e6ebf2;
  border-radius: 20px;
  box-shadow: 0 18px 50px rgba(16, 24, 40, 0.06);
}
h1 {
  margin: 0 0 12px;
  font-size: 28px;
  line-height: 1.25;
  text-align: center;
  text-transform: uppercase;
}
h2 {
  margin: 28px 0 10px;
  font-size: 20px;
  line-height: 1.35;
}
p { margin: 0 0 10px; }
p.center { text-align: center; }
p.bullet {
  position: relative;
  margin-left: calc(24px + var(--list-level, 0) * 24px);
}
p.bullet::before {
  content: "•";
  position: absolute;
  left: -18px;
}
strong { font-weight: 700; }
em { font-style: italic; }
a { color: #0a84ff; }
.req { background: #fff6e5; border: 1px dashed #e0a53e; border-radius: 8px; padding: 10px 14px; }
@media (max-width: 640px) {
  body { font-size: 15px; }
  main {
    width: 100%;
    margin: 0;
    padding: 28px 18px;
    border: 0;
    border-radius: 0;
  }
  h1 { font-size: 22px; }
  h2 { font-size: 18px; }
}
@media print {
  body { background: #ffffff; }
  .bar { display: none; }
  main { width: 100%; margin: 0; padding: 0; border: 0; box-shadow: none; }
}