/* 404 页面：复用主站样式，专业提示 */
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f4f7fb;
  color: #1f2a44;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}
.box {
  max-width: 520px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 6px 24px rgba(20, 40, 90, 0.08);
  padding: 40px;
  text-align: center;
}
.code {
  font-size: 72px;
  font-weight: 700;
  color: #1d6fe8;
  line-height: 1;
  margin: 0 0 12px;
}
h1 {
  font-size: 22px;
  margin: 0 0 12px;
  color: #1f2a44;
}
p {
  margin: 0 0 24px;
  color: #5a6b8c;
  line-height: 1.7;
  font-size: 15px;
}
.actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}
.btn {
  display: inline-block;
  padding: 10px 22px;
  border-radius: 6px;
  text-decoration: none;
  font-size: 15px;
  border: 1px solid #1d6fe8;
  color: #1d6fe8;
  background: #fff;
  transition: all .2s;
}
.btn-primary {
  background: #1d6fe8;
  color: #fff;
}
.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(29, 111, 232, .25);
}
ul {
  text-align: left;
  margin: 0 0 24px;
  padding-left: 20px;
  color: #5a6b8c;
  font-size: 14px;
  line-height: 1.8;
}
</content>