/* header */
header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding:0 16px;
  background-color: #fff;
  z-index: 99;
}
header .logo {
  height: 34px;
}
header .tail {
  text-decoration: none;
  color: #4698ff;
  font-size: 13px;
}
header .tail:hover {
  color: #3a8aee;
}