.top-tab {
  width: 1200px;
  margin: 0 auto;
  height: 64px;
  display: flex;
}
.tab-left {
  flex: 1;
  display: flex;
  align-items: center;
}
.tab-right {
  flex: 1;
}
.tab-nav {
  padding: 0;
  margin: 0;
}

.tab-nav li {
  display: inline-block;
  padding: 0 25px;
  line-height: 62px;
  cursor: pointer;
  color: #fff;
}
.li-normal {
  color: #fff;
}
.li-active {
  border-bottom: 3px solid #0084ff;
  /* color: #108ee9; */
}
.bg-color {
  background-color: rgba(0, 0, 0, 0.3);
}
.tab-expand,
.tab-expand-dev {
  width: 100%;
  background: #fff;
  position: fixed;
  left: 0;
  padding: 0;
  margin: 0;
  height: 0;
  background: #191e2d;
  box-shadow: 0px 4px 20px 0px rgba(25, 30, 45, 0.75);
  /* padding: 30px 30%; */
  box-sizing: border-box;
  list-style-type: none;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  transition: 15ms ease-in;
  overflow: hidden;
}
.tab-expand li,
.tab-expand-dev li {
  color: #fff;
  cursor: pointer;
  width: 25%;
  font-size: 14px;
}
.icon-down {
  width: 12px;
  height: 12px;
  margin: -1px 0 0 5px;
  vertical-align: middle;
}