.app_header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  box-sizing: border-box;
  height: 16vw;
  display: flex;
  align-items: center;
  padding: 0 5.3vw;
  justify-content: space-between;
  z-index: 1000;
  opacity: 0;
  transition: all 0.5s;
  cursor: pointer;
  tap-highlight-color: transparent;
  -webkit-tap-highlight-color: transparent;
}
.app_header.active {
  opacity: 1;
  z-index: 1001;
}
.app_header_black {
  background-color: #04041f;
  border-top: 1px solid #04041f;
  border-bottom: 1px solid rgba(4, 4, 31, 0.5);
  cursor: pointer;
}
.app_header_white {
  background-color: #ffffff;
  border-top: 1px solid #ffffff;
  border-bottom: 1px solid #c2c2c2;
  cursor: pointer;
}
.app_header .app_logo {
  height: 2.6vw;
  width: 19.46vw;
  display: block;
}
.app_header .app_logo img {
  height: 100%;
  width: 100%;
  display: block;
}
.app_header .app_menu_right {
  display: flex;
  align-items: center;
}
.app_header .langsign {
  width: 10vw;
  margin-right: 3vw;
}
.app_header .app_menu_btn {
  width: 5.3vw;
}
.app_header .app_menu_btn img {
  width: 100%;
  display: block;
}

.app_nav {
  position: fixed;
  z-index: 200;
  height: 0;
  top: 16vw;
  left: 100%;
  right: 0;
  padding-top: 3vw;
  padding-bottom: 3vw;
  background-color: #000000;
  overflow: hidden;
  transition: all 0.3s;
  box-sizing: border-box;
}

.app_nav ul {
  list-style-type: none;
  padding: 0;
  margin: 0;
}

.app_nav ul li {
  line-height: 10.6vw;
}

.app_nav ul li div {
  box-sizing: border-box;
  padding-left: 5.3vw;
  display: block;
  color: #ffffff;
  line-height: 10.6vw;
  font-size: 4.2vw;
}

.app_nav_white {
  background-color: #ffffff;
}

.app_nav_white ul li div {
  color: #000000;
}

.app_nav_white ul li div {
  color: #000000;
}
.app_nav ul li .active {
  font-size: 5.2vw;
  font-weight: bold;
}