html,
body {
  min-height: 100vh;
}
body {
  padding-bottom: 380px;
  position: relative;
  font-size: 14px;
  font-family: Microsoft YaHei;
}
.container {
  width: 1200px !important;
  min-width: 1200px !important;
  padding: 0;
  margin: 0 auto;
  position: relative;
}
.banner {
  min-width: 1200px;
}
/* @media all and (min-width: 1920px) {
  .container {
    width: 1200px !important;
  }
} */

.center {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
}
.header-box {
  padding-bottom: 10px;
}
.header-box:hover{
  background: #fff;
}
.header .logo {
  /* padding: 18px 0; */
  width: 150px;
  height: 47px;
  background:url(../imgs/logo.png) no-repeat center;
  background-size: cover;
  margin-top: 18px;
}
.header-box:hover .header .logo {
  background-image: url(../imgs/logo2.png);
}
.header-box:hover .nav {
  color: #333;
}
.nav {
  height: 72px;
  color: #fff;
}
.nav .item {
  float: left;
  width: 90px;
  text-align: center;
  margin-left: 30px;
  cursor: pointer;
}
.nav .about_intro,.nav .join {
  position: relative;
}
.nav .item.active {
  background: #ff9833;
  color: #fff;
}
.nav .item .text {
  line-height: 72px;
  display: inline-block;
}
.nav .item .text .line {
  height: 2px;
  background: #ffffff;
  margin-top: -13px;
  display: none;
}
.nav .item.active .text .line {
  display: block;
}
.footer {
  height: 380px;
  background: #242323;
  position: absolute;
  bottom: 0;
  width: 100%;
  padding: 50px 0 10px;
  color: #fff;
}
.footer .text {
  text-align: center;
  font-weight: 400;
  color: #939394;
  margin-top: 46px;
}

.footer .left {
  width: 476px;
}
.footer .logo1 img {
  width: 148px;
}
.footer-nav {
  margin-top: 10px;
  margin-bottom: 38px;
}
.footer-nav .item {
  cursor: pointer;
}
.footer .line {
  margin-top: 10px;
  height: 1px;
  background: #ffffff;
  opacity: 0.3;
}
.footer .contact {
  line-height: 3;
}
.footer .p2 {
  line-height: 2;
}
.footer .right .code img {
  width: 180px;
  height: 180px;
}
.footer .right .code {
  text-align: center;
}
.footer .right .code1 {
  margin-left: 73px;
}
.footer .right .p {
  text-align: center;
  margin-top: 10px;
}
.about-nav,.join-nav {
  position: absolute;
  width: 130px;
  background: #ffffff;
  text-align: center;
  color: #333333;
  padding-bottom: 22px;
  top: 77px;
  left: -19px;
  border-top: 1px solid #ff9833;
  z-index: 99;
}
.about-nav .about-item ,.join-nav .join-item{
  margin-top: 14px;
}
.about-nav .about-item.active, .join-nav .join-item.active {
  color: #ff9833;
}
.toTop {
  cursor: pointer;
  position: fixed;
  bottom: 200px;
  right: 100px;
}
.toTop img {
  width: 110px;
  height: 110px;
}
.middle .title {
  font-size: 26px;
  font-weight: bold;
  color: #333333;
  margin: 53px auto 30px;
}
.middle .title .line {
  margin-top: 10px;
  position: relative;
  width: 400px;
  height: 1px;
  background: #efecec;
}
.middle .title .line .line1 {
  width: 49px;
  height: 6px;
  background: #ff9833;
  position: absolute;
  left: 0;
  bottom: 1px;
}
.middle .title .span {
  font-size: 12px;
  font-weight: 400;
  color: #999999;
  display: inline-block;
  margin-left: 10px;
}
.banner-text {
  color: #fff;
  text-align: center;
}