.transition-all {
  transition: all 0.2s;
}
.flex-center {
  display: flex;
  align-items: center;
}
header {
  width: 100vw;
  height: 80px;
  background-color: rgba(255, 255, 255, 0);
  display: flex;
  align-items: center;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 999;
  font-size: 16px;
  /* 
  background-color: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px); 
  -webkit-backdrop-filter: blur(10px); 
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: @shadow-light;
  */
}
header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
header .container .left-nav {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}
header .container .left-nav .logo {
  width: 126px;
  height: 40px;
  margin-right: 80px;
  cursor: pointer;
}
header .container .left-nav .nav-list {
  display: flex;
  padding-top: 30px;
}
header .container .left-nav .nav-list a {
  color: #000000;
  transition: color 0.2s;
  margin-right: 60px;
  font-size: 16px;
  position: relative;
  white-space: nowrap;
  font-weight: 600;
}
header .container .left-nav .nav-list a:hover {
  color: #FE6C6C;
}
header .container .left-nav .nav-list .btn {
  cursor: pointer;
  position: relative;
  display: flex;
  align-items: center;
}
header .container .left-nav .nav-list .btn .title {
  display: flex;
  flex-wrap: nowrap;
  align-items: center;
  font-weight: 600;
}
header .container .left-nav .nav-list .btn #showTitle {
  font-weight: bold;
  font-size: 14px;
  color: #FE6C6C;
  margin-top: 4px;
}
header .container .left-nav .nav-list .btn .title-icon1,
header .container .left-nav .nav-list .btn .title-icon2 {
  width: 12px;
  height: 8px;
  margin-left: 6px;
}
header .container .left-nav .nav-list .btn .title-icon2 {
  display: none;
}
header .container .left-nav .nav-list .btn:hover .title-icon1 {
  display: none;
}
header .container .left-nav .nav-list .btn:hover .title-icon2 {
  display: block;
}
header .container .left-nav .nav-list .btn:hover .list {
  display: flex;
  padding: 32px 30px;
  flex-direction: row;
  flex-wrap: wrap;
}
header .container .left-nav .nav-list .btn .list {
  width: 545px;
  height: 380px;
  background: #FFFFFF;
  box-shadow: 0px 0px 20px 1px rgba(0, 0, 0, 0.1);
  border-radius: 10px;
  cursor: auto;
  position: absolute;
  top: 34px;
  left: 0;
  display: none;
}
header .container .left-nav .nav-list .btn .list .list-item {
  width: 230px;
  height: 66px;
  cursor: pointer;
  border-bottom: 1px solid #F2F2F2;
  display: flex;
  margin-bottom: 20px;
}
header .container .left-nav .nav-list .btn .list .list-item:nth-child(2n) {
  margin-left: 20px;
}
header .container .left-nav .nav-list .btn .list .list-item:hover .title {
  color: #FE6C6C;
}
header .container .left-nav .nav-list .btn .list .list-item .icon-img {
  width: 48px;
  height: 48px;
  margin-right: 10px;
}
header .container .left-nav .nav-list .btn .list .list-item .title {
  font-weight: bold;
  font-size: 18px;
  color: #000000;
  transition: color 0.2s;
}
header .container .left-nav .nav-list .btn .list .list-item .content {
  font-weight: 400;
  font-size: 14px;
  color: #666666;
}
header .right-btn {
  white-space: nowrap;
  font-weight: bold;
  font-size: 20px;
  color: #000000;
  display: flex;
  align-items: center;
}
header .right-btn .icon-img {
  width: 18px;
  height: 18px;
  margin-right: 6px;
}