.header {
  position: fixed;
  width: 100%;
  z-index: 100;
}

.logo {
  position: relative;
  width: 140px;
  height: 31px;
  background: #333;
  border-radius: 6px;
  margin: 16px 24px 16px 0;
  float: left;
}

.logo span {
  position: absolute;
  color: #fff;
  font-size: 15px;
  top: -17px;
  left: 9px;
}

.nav {
  line-height: 64px !important;
}