:root {
  --ink: #18212b;
  --muted: #5b6775;
  --line: #e5ebf1;
  --bg: #f6f8fb;
  --card: #ffffff;
  --accent: #2b6cb0;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eef3f8 0%, var(--bg) 45%, #fff 100%);
  line-height: 1.75;
}
.wrap { max-width: 900px; margin: 0 auto; padding: 40px 20px 28px; }
header, section, article {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 30px;
}
header { box-shadow: 0 8px 28px rgba(24, 40, 70, 0.05); }
section, article { margin-top: 18px; }
.eyebrow {
  color: var(--accent);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  margin-bottom: 10px;
}
h1 { margin: 0 0 12px; font-size: 30px; line-height: 1.3; }
h2 {
  margin: 0 0 12px;
  font-size: 19px;
  border-left: 4px solid var(--accent);
  padding-left: 10px;
}
h3 { margin: 18px 0 8px; font-size: 17px; }
.lead, p, li { color: #333; font-size: 15px; }
.lead { margin: 0; color: var(--muted); }
ul, ol { margin: 8px 0 0; padding-left: 1.25em; }
.meta {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 8px 12px;
  margin-top: 6px;
}
.meta dt { color: var(--muted); }
.meta dd { margin: 0; }
.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin-top: 8px;
}
@media (min-width: 720px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
}
a.item {
  display: block;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 16px 18px;
  background: #fafcfe;
  text-decoration: none;
  color: inherit;
  transition: border-color .15s, box-shadow .15s;
}
a.item:hover {
  border-color: #b7d0ea;
  box-shadow: 0 6px 18px rgba(43, 108, 176, 0.08);
}
a.item h3 { margin: 0 0 6px; font-size: 16px; color: var(--accent); }
a.item p { margin: 0; color: var(--muted); font-size: 14px; }
a.item .more { margin-top: 8px; font-size: 13px; color: var(--accent); }
.note {
  margin-top: 10px;
  background: #f2f7fc;
  border: 1px solid #d7e6f5;
  border-radius: 12px;
  padding: 14px 16px;
  color: #345;
  font-size: 14px;
}
.nav {
  margin-bottom: 14px;
  font-size: 14px;
}
.nav a { color: var(--accent); text-decoration: none; }
.nav a:hover { text-decoration: underline; }
footer {
  margin-top: 28px;
  text-align: center;
  color: var(--muted);
  font-size: 13px;
  padding-bottom: 20px;
}
footer a { color: var(--muted); text-decoration: none; }
.steps li { margin-bottom: 6px; }