.header {
  width: 100%;
  height: 80px;
  position: sticky;
  top: 0;
  z-index: 9;
}

.header-content {
  width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  transition: all 0.3s;
  height: 100%;
}

.header-content .logo {
  width: 210px;
  height: 80px;
}

.header.fixed .header-content {
  position: static;
  height: 54px;

}
.header-content::after {
  display: block;
  content: "";
  position: absolute;
  width: 100vw;
  height: 54px;
  top: 0;
  right: 0;
  left: 0;
  z-index: -1;
  background-color: transparent;
  transition: all 0.3s;
}
.header.fixed .header-content::after {
  background-color: #131212;
}
.header.fixed .header-content .logo {
  width: 156px;
  height: 54px;
}

.lang-switch {
  width: 110px;
  height: 34px;
  border-radius: 4px;
  border: 1px solid #ffffff;
  font-size: 14px;
  font-weight: 500;
  color: #ffffff;
  cursor: pointer;
}

.lang-active {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 34px;
  padding: 0 10px 0 16px;
}

.lang-switch .icon {
  width: 14px;
  transition: all 0.3s;
}

.lang-switch .icon.open {
  transform: rotateZ(180deg);
}

.lang-box {
  width: 110px;
  background: #ffffff;
  border-radius: 4px;
  border: 1px solid #ffffff;
  position: absolute;
  right: 0;
  top: 10px;
  padding: 0 14px 14px;
  font-size: 14px;
  font-weight: 400;
  color: #71757b;
  position: relative;
  display: none;
}

.lang-box::after {
  display: block;
  content: "";
  width: 0;
  height: 0;
  border: 10px solid;
  border-color: transparent transparent #fff;
  position: absolute;
  top: -18px;
  right: 8px;
}

.lang-box .lang-item {
  margin-top: 20px;
  cursor: pointer;
}

.lang-box .lang-item:hover,
.lang-box .lang-item.active {
  font-weight: 500;
  color: #1e2029;
}

.lang-box .lang-item.active {
  background: url(https://qiniu-cdn.hotelux.com/FnGD2K5yaflHFYd3ezPQCa55NlOi_84.png)
    no-repeat center right;
  background-size: 14px 14px;
}

.main-bg {
  width: 100%;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
}

.bac-img {
  width: 100%;
}

.container {
  position: relative;
  z-index: 2;
}

.content {
  width: 1200px;
  margin: 0 auto;
}