:root {
  --bg: #f4f6fb;
  --card: #fff;
  --line: #e6ebf4;
  --text: #1c2434;
  --muted: #6b7690;
  --accent: #e85d75;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--text);
}
.wrap { width: min(880px, calc(100% - 32px)); margin: 0 auto; }
header {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 60px;
}
.logo { font-weight: 700; }
nav a { color: var(--muted); text-decoration: none; margin-left: 18px; }
.app {
  display: flex;
  gap: 24px;
  align-items: center;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 28px;
  margin: 28px 0;
}
.icon {
  width: 88px;
  height: 88px;
  border-radius: 20px;
  box-shadow: 0 8px 24px rgba(232, 93, 117, 0.25);
}
h1 { margin: 0 0 8px; font-size: 28px; }
.sub { margin: 0; color: var(--muted); }
.tags { display: flex; flex-wrap: wrap; gap: 8px; padding: 0; margin: 14px 0 0; list-style: none; }
.tags li {
  background: #ffe8ee;
  color: #c23b54;
  font-size: 12px;
  padding: 4px 8px;
  border-radius: 999px;
}
.btn {
  display: inline-block;
  margin-top: 18px;
  background: var(--accent);
  color: #fff;
  text-decoration: none;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 700;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  margin-bottom: 64px;
}
.card h2 { font-size: 18px; }
.card p, .card li { color: var(--muted); line-height: 1.7; }
footer { color: var(--muted); font-size: 13px; padding: 0 0 40px; }
@media (max-width: 640px) {
  .app { flex-direction: column; align-items: flex-start; }
}