.header {
  width: 100%;
  height: 60px;
  background: #fff;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 199;
}
.header .content {
  width: 1200px;
  margin: 0 auto;
  height: 100%;
}
.header .logo {
  background-image: linear-gradient(to right, #f310d8, #f310d8);
  -ms-background-clip: text;
  -o-background-clip: text;
  -moz-background-clip: text;
  -webkit-background-clip: text;
  background-clip: text;
  -ms-text-fill-color: transparent;
  -o-text-fill-color: transparent;
  -moz-text-fill-color: transparent;
  -webkit-text-fill-color: transparent;
  margin-right: 70px;
}
.header .logo a {
  font-size: 28px;
  cursor: pointer;
}
.header nav {
  width: 735px;
}
.header nav li {
  height: 60px;
  line-height: 60px;
  font-size: 14px;
  color: #f310d8;
  margin: 0 22px;
  cursor: pointer;
}
.header nav li .drop-down-triangle {
  background-image: url(../img/icon-scene.png);
  width: 10px;
  height: 10px;
  background-size: 100% 100%;
  background-repeat: no-repeat;
  margin-left: 5px;
  margin-top: -3px;
}