header {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  width: 12rem;
  height: 0.8rem;
  margin: 0 auto;
}
header .content {
  width: 12rem;
  margin: 0 auto;
  height: 100%;
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  -webkit-box-pack: justify;
      -ms-flex-pack: justify;
          justify-content: space-between;
}
header ul {
  display: -webkit-box;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-align: center;
      -ms-flex-align: center;
          align-items: center;
  height: 100%;
}
header ul li {
  font-size: 0.16rem;
  margin-right: 0.6rem;
  cursor: pointer;
  height: 100%;
  line-height: 0.8rem;
}
header ul li a {
  color: #3b4387;
  font-size: 0.16rem;
}
header ul li a:hover {
  color: #4c59ff;
}
header ul li:last-child {
  margin: 0;
}
header ul li.active a {
  font-weight: bold;
}

header.fixed {
  position: fixed;
  top: 0;
  left: 0;
  z-index: 2;
  width: 100%;
}

header.active {
  background-color: #ffffff;
  width: 100%;
  -webkit-box-shadow: 0rem 0.08rem 0.13rem 0.03rem rgba(106, 117, 164, 0.19);
          box-shadow: 0rem 0.08rem 0.13rem 0.03rem rgba(106, 117, 164, 0.19);
}