:root {
  --ink: #1f2937;
  --muted: #4b5563;
  --line: #eceef8;
  --purple: #667eea;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, sans-serif;
  color: var(--ink);
  background: linear-gradient(180deg, #eef2ff 0%, #f8fafc 220px, #f8fafc 100%);
  line-height: 1.65;
}
.wrap {
  max-width: 760px;
  margin: 0 auto;
  padding: 28px 20px 48px;
}
.top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  margin-bottom: 22px;
}
.brand {
  color: var(--purple);
  font-weight: 800;
  text-decoration: none;
}
.back {
  color: #4338ca;
  text-decoration: none;
  font-weight: 650;
  font-size: 0.95em;
}
h1 { font-size: 1.85em; margin: 0 0 8px; }
.meta { color: var(--muted); margin: 0 0 24px; font-size: 0.95em; }
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 28px 28px 12px;
  box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
}
h2 { font-size: 1.15em; margin: 22px 0 8px; }
p, li { color: #374151; }
ul { padding-left: 1.2em; }
.foot {
  margin-top: 28px;
  font-size: 0.9em;
  color: var(--muted);
}
.foot a { color: var(--purple); text-decoration: none; }