body {
  margin: 0;
  background: #f8fafc;
  font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

.help {
  position: fixed;
  right: 20px;
  bottom: 20px;
  padding: 12px 16px;
  border-radius: 999px;
  background: #0f766e;
  color: #ffffff;
  text-decoration: none;
}

.page {
  width: min(760px, calc(100% - 40px));
  margin: 0 auto;
}

.topbar {
  position: sticky;
  top: 0;
  padding: 16px;
  background: #ffffff;
  border-bottom: 1px solid #cbd5e1;
  font-weight: 700;
  width: 100%;
}

.content {
  min-height: 1200px;
  padding: 24px 0 80px;
}