body {
  background-color: #000;
}

header {
  width: 100%;
  height: 73px;
  display: flex;
  justify-content: space-between;
  padding: 0 90px;
  box-sizing: border-box;
  position: fixed;
  top: 0;
  z-index: 100;
  align-items: center;
  background-color: rgba(0, 0, 0, 0.6);
}

header .logo {
  width: 174px;
  height: 52px;
  background-color: rgb(85, 85, 85);
  background: url('/assets/img/logo.png') no-repeat;
  background-size: contain;
  text-indent: -400px;
  overflow: hidden;
}

header .menu {
  display: flex;
  align-items: center;
}

.menu .menu-item {
  min-width: 72px;
  margin-right: 40px;
  text-align: center;
  font-size: 18px;
  color: #fff;
  position: relative;

}


.menu .menu-item ::after {
  transition: all 0.6s;
  display: block;
  content: "";
  background-color: #fff;
  width: 10px;
  height: 3px;
  position: absolute;
  bottom: -20px;
  left: 50%;
  transform: translateX(-50%) translateY(-10px);
  opacity: 0;
}

.menu .menu-item.active ::after,
.menu .menu-item:hover ::after {
  transform: translateX(-50%) translateY(0px);
  opacity: 1;
  width: 80px;
}


.menu-item .en {
  font-size: 12px;
}

.null-box {
  height: 0;
  width: 100%;
}

.contact {
  background: rgba(0, 0, 0, 0.6);
  text-align: center;
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 100;
}

.contact h3 {
  letter-spacing: 0.1em;
  font-weight: normal;
  font-size: 18px;
  color: #fff;
}

.contact p,.contact a {
  color: #A6B2BF;
  font-size: 0.9rem;
}
.contact a{
  color: #f36168;
}
.hover-img img {
  width: 100%;
  height: 100%;
  transform: scale(1);
  transition: all 1s;
}

.hover-img:hover img {
  transform: scale(1.2);
}

@media screen and (max-width:1023px) {
  header{
    height: 50px;
    padding: 10px 15px;
    
  }
  header .logo{
    height: 40px;
    background-size: contain;
  }
  header .menu{
    position: absolute;
    display: block;
    right: -200px;
    top: 50px;
    z-index: 999;
    background-color:rgba(0, 0, 0, 0.6);
    padding: 20px;
    text-align: left;
  }
  .menu .menu-item{
    display: block;
    width: 100%;
    height: 40px;
    margin-right: 0;
  }
  header .menu-icon{
    width: 40px;
    height: 40px;
    margin-right: 7px;
  }
  .menu-icon svg{
    width: 100%;
    height: 100%;
  }
  .menu .menu-item ::after {
    bottom: 12px;
    width: 1px;
  }
  
  .menu .menu-item:last-child {
    /* margin-right: 0; */
  }
}
@media screen and (max-width:750px) {
  header{
    width: 100vw;
  }
}
body::-webkit-scrollbar {
  width: 0px;
  height: 10px;
  background-color: #f5f5f5;
}

/*定义滚动条轨道 内阴影+圆角*/
body::-webkit-scrollbar-track {
  background: #fff;
}

/*定义滑块 内阴影+圆角*/
body::-webkit-scrollbar-thumb {
  border-radius: 3px;
  background-color: #999;
}

body::-webkit-scrollbar-thumb:hover {
  border-radius: 3px;
  background-color: #ccc;
}