.public_all {
  margin-left: 15%;
  width: 85%;
  max-width: 1620px;
}
.header {
  position: fixed;
  top: 0;
  left: 0;
  display: flex;
  width: 15%;
  height: 100vh;
  padding: 3rem 0 5.5rem;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
  background-color: #FFFFFF;
  box-shadow: 0px 0px 16px 0px rgba(117, 114, 108, 0.12);
}
.logo_nav {
  width: 100%;
}
.logo_nav .logo {
  display: block;
  width: 73%;
  margin: 0 auto 1rem;
}
.logo_nav .lineBox {
        display: block;
        width: 75%;
        height: 1px;
        background-color: #1B1B1B;
        opacity: 0.2;
        margin: 0 auto 0.5rem;
    }
.logo_nav .logo img {
  width: 100%;
}
.logo_nav .target {
  text-align: center;
  font-family: Microsoft YaHei;
  font-weight: 400;
  font-size: calc(10px + 0.4rem);
  color: #636363;
  margin-bottom: 2.9rem;
  padding: 0 0.5rem;
}
.logo_nav .navB .head_nav {
  font-family: Microsoft YaHei;
  font-weight: 400;
  font-size: calc(10px + 0.4rem);
  color: #3E3E3E;
  text-align: center;
  transition: 0.3s ease-out;
}
.logo_nav .navB .head_nav a {
  display: flex;
  padding: 1rem;
  align-items: center;
  justify-content: center;
}
.logo_nav .navB .head_nav a .nav_line {
  display: block;
  width: 0%;
  height: 4px;
  background-color: #AD894A;
  transform: skewX(-30deg);
  transition: 0.3s ease-out;
}
.logo_nav .navB .head_nav.head_active,
.logo_nav .navB .head_nav:hover {
  color: #D1AA65;
}
.logo_nav .navB .head_nav.head_active .nav_line,
.logo_nav .navB .head_nav:hover .nav_line {
  width: 10%;
  margin-left: calc(5px + 0.5rem);
}
.contect_lang .conte_but {
  display: flex;
  width: calc(100px + 4rem);
  height: calc(24px + 1rem);
  background: #3F392C;
  font-family: Microsoft YaHei;
  font-weight: 300;
  font-size: calc(10px + 0.3rem);
  color: #FFFFFF;
  align-items: center;
  justify-content: center;
  margin: 0 auto 2.5rem;
}
.contect_lang .navBox_lang {
  font-family: Microsoft YaHei;
  font-weight: 400;
  font-size: calc(10px + 0.3rem);
  color: #919191;
  text-align: center;
}
.contect_lang .navBox_lang .lang2 {
  color: #000000;
}