header {
  position: absolute;
  left: 0;
  top: 0;
  z-index: 9;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: #010101;
  height: 1.2162rem;
  width: 100%;
  padding: 0 0.5405rem;
}
header a .logo {
  width: 2.4324rem;
  height: 0.6486rem;
}
header a .text {
  height: 0.3514rem;
  margin-left: 0.6757rem;
  margin-top: -0.1892rem;
}
header .down {
  width: 1.7297rem;
  height: 0.6486rem;
  border-radius: 0.1081rem;
  line-height: 0.6486rem;
  text-align: center;
  background: #f4c210;
  font-size: 0.2703rem;
  transition: all 0.3s;
}
header .down:active {
  transform: scale(0.9);
}