:root {
  color: #182a42;
  background: #f2f6fa;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
  line-height: 1.7;
}
* { box-sizing: border-box; }
body { margin: 0; }
a { color: #2059a9; text-underline-offset: 4px; }
a:focus-visible { outline: 3px solid #087c77; outline-offset: 4px; }
.wrap { width: min(66rem, 100% - 2.5rem); margin-inline: auto; }
.site-header { background: #fff; border-bottom: 1px solid #dce4eb; }
.site-header .wrap, .brand, .site-header nav { display: flex; align-items: center; gap: 1rem; }
.site-header .wrap { justify-content: space-between; flex-wrap: wrap; padding-block: 0.85rem; }
.site-header nav { flex-wrap: wrap; gap: 0.5rem 1.2rem; font-size: 0.9rem; }
.brand { color: inherit; gap: 0.55rem; text-decoration: none; font-weight: 700; }
.brand img { border-radius: 0.5rem; }
.hero { background: #132942; color: white; padding: clamp(2rem, 6vw, 5rem) 0; }
.hero .wrap { display: grid; grid-template-columns: minmax(0, 1.7fr) minmax(0, 1fr); gap: 2.75rem; align-items: center; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 3.5rem); line-height: 1.25; margin: 0 0 1rem; }
.hero p { max-width: 40em; color: #d7e6f3; }
.hero ol { padding: 0; margin: 0; list-style: none; counter-reset: steps; }
.hero li { counter-increment: steps; border-top: 1px solid #4d687f; padding: 0.65rem 0; }
.hero li::before { content: counter(steps, decimal-leading-zero); color: #7cdfce; margin-right: 0.8rem; font-variant-numeric: tabular-nums; }
.action { display: inline-block; color: #093733; background: #83e3d2; font-weight: 700; border-radius: 0.4rem; padding: 0.55rem 0.9rem; text-decoration: none; }
.details { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.5rem; padding-block: 2.25rem; }
.details article { border-top: 2px solid #19746f; padding-top: 1rem; }
.details h2 { margin: 0; font-size: 1.22rem; }
.details p { margin: 0.6rem 0 0; }
.related { margin-bottom: 2.75rem; border-top: 1px solid #ccd9e4; padding-top: 1rem; display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; }
footer { padding: 1.2rem 0; background: white; border-top: 1px solid #dce4eb; color: #455d71; font-size: 0.86rem; }
footer .wrap { display: flex; flex-wrap: wrap; gap: 0.5rem 1.2rem; }
@media (max-width: 680px) {
  .hero .wrap, .details { grid-template-columns: 1fr; gap: 1.4rem; }
}