.top-logo{
  position: absolute;
  top: 0;
  left: 20px;
  z-index: 1;
}
.top-logo h1{
  visibility: hidden;
  margin-top: -100px;
}
.nav{
  position: relative;
  z-index: 1;
  background-color: #1c1c1c;
  width: 100%;
  font-size: 14px;
  font-family: "微软雅黑";
}
.nav-menu{
  float: right;
}
.nav-nav{
  float: left;
}
.nav-nav li{
  float: left;
  width: 100px;
  height: 70px;
  line-height: 70px;
  text-align: center;
}
.nav-nav li a{
  display: inline-block;
}
.nav-nav li a div{
  width: 100px;
  height: 20px;
  overflow: hidden;
}
.nav-nav-item span{
  display: block;
  height: 24px;
  line-height: 24px;
}
.nav-nav-item span:first-child{
  color: #a9a9a9;
}
.nav-nav-item span:last-child{
  color: #fff;
}
.nav-nav-item{
  transition: all 0.5s ease;
  -moz-transition: all 0.5s ease; /* Firefox 4 */
  -webkit-transition: all 0.5s ease; /* Safari and Chrome */
  -o-transition: all 0.5s ease; /* Opera */
}
.nav-nav li:hover .nav-nav-item{
  margin-top: -24px;
}
.nav-nav li:nth-child(1) .nav-nav-item{
  margin-top: -24px;
}

.nav-iconbar{
  float: right;
}
.nav-iconbar li{
  float: left;
  margin-right: 10px;
}
.nav-iconbar li a{
  position: relative;
  display: inline-block;
  width: 32px;
  height: 70px;
  line-height: 70px;
  overflow: hidden;
}
.nav-iconbar li a span{
  display: none;
  position: absolute;
  top: 50%;
  margin-top: -15px;
  left: 0;
  z-index: 1;
  text-indent: 35px;
  width: 180px;
  height: 30px;
  line-height: 30px;
  color: #767676;
  background-color: #292929;
  border-radius: 15px;
}
.nav-iconbar li a:before{
  content: "";
  position: relative;
  z-index: 2;
  display: inline-block;
  width: 32px;
  height: 32px;
  vertical-align: middle;
  background-repeat: no-repeat;
  background-position: 0 50%;
}
.nav-iconbar li:nth-child(1) a:before{
  background-image: url("../img/tel-icooo.png");
}
.nav-iconbar li:nth-child(2) a:before{
  background-image: url("../img/tel-ico2oo.png");
}
.nav-iconbar li:nth-child(3) a:before{
  background-image: url("../img/tel-ico3oo.png");
}
.nav-iconbar li a{
  transition: all 1.5s ease 0.5s;
  -moz-transition: all 1.5s ease 0.5s; /* Firefox 4 */
  -webkit-transition: all 1.5s ease 0.5s; /* Safari and Chrome */
  -o-transition: all 1.5s ease 0.5s; /* Opera */
}
.nav-iconbar li a:hover{
  width: 180px;
}
.nav-iconbar li a:hover span{
  display: inline-block;
}

.banner-wrap .banner-box{
  position: relative;
  overflow: hidden;
  height: 586px;
}


.banner-wrap .banner-bj{
 position: absolute; /* 仍然需要绝对定位 */  
  top: 50%; /* 相对于.banner-wrap顶部移动50% */  
  left: 50%; /* 相对于.banner-wrap左边移动50% */  
  transform: translate(-50%, -50%); 通过transform调整回来，实现居中 */  
  /* 其他样式保持不变或根据需要添加 */  
}

.banner-wrap .head-line2{
  position: absolute;
  top: 300px;
  text-align: center;
  left: 0;
  right: 0;
  font-family: "微软雅黑";
  font-size: 45px;
  color: #000000;
}

.banner-wrap .head-line3{
  position: absolute;
  top: 400px;
  text-align: center;
  left: 0;
  right: 0;
  font-family: "微软雅黑";
  font-size: 20px;
  color: #4b515d;
}


.banner-main li:nth-of-type(1) .banner-bj{
  display: block;
}
.banner-bj img{
  width: 100%;
  height: 586px;
}
.banner-wrap .caption{
  position: absolute;
}
.banner-wrap .banner-logo{
  top: 30px;
  left: 50%;
  margin-left: -117px;
}
.banner-wrap .banner-text1{
  top: 233px;
  left: 50%;
  margin-left: -250px;
}
.banner-wrap .banner-text2{
  top: 315px;
  left: 50%;
  margin-left: -377px;
}
.banner-wrap .banner-text3{
  top: 380px;
  left: 50%;
  margin-left: -220px;
}
.banner-wrap .banner-muyu2{
  position: absolute;
  opacity: 0;
  top: 45%;
  margin-top: -235px;
  right: -610px;
}
.banner-wrap .banner-muyu3{
  position: absolute;
  opacity: 0;
  top: 40%;
  margin-top: -220px;
  left: -350px;
}
.banner-wrap .banner-xiaotou1{
  position: absolute;
  opacity: 0;
  top: 10px;
  left: 40%;
  margin-left: -334px;
}
.banner-wrap .banner-xiaotou2{
  position: absolute;
  opacity: 0;
  top: 200px;
  left: 116%;
  margin-left: -206px;
}
.banner-wrap .banner-phone{
  position: absolute;
  opacity: 0;
  top: 277px;
  left: 45%;
  margin-left: 145px;
}
.banner-wrap .banner-glb{
  position: absolute;
  opacity: 0;
  top: 333px;
  left: 45%;
  margin-left: -225px;
}
.banner-wrap .banner-women{
  position: absolute;
  opacity: 0;
  top: 175px;
  left: 50%;
  margin-left: -193px;
}
.banner-wrap .banner-text4{
  position: absolute;
  opacity: 0;
  top: 45px;
  left: 117%;
  margin-left: -222px;
}
.banner-wrap .banner-2-2{
  position: absolute;
  opacity: 0;
  top: 50%;
  left: 45%;
  margin-left: -403px;
  margin-top: -146px;
}
.banner-wrap .banner-text5{
  position: absolute;
  opacity: 0;
  top: 40px;
  left: 115%;
  margin-left: -199px;
}
.banner-slider{
  position: absolute;
  bottom: 100px;
  left: 50%;
  margin-left: -136px;
}
.banner-slider li{
  float: left;
  width: 50px;
  margin-left: 5px;
  height: 10px;
  background-image: url("../img/banner-ico.png");
  background-repeat: no-repeat;
  cursor: pointer;
}
.banner-slider li.selected{
  background-image: url("../img/selected.png");
}
.banner-slider li:hover{
  background-image: url("../img/selected.png");
}
.banner-wrap .top-ico1{
  position: absolute;
  bottom: 40px;
  left: 50%;
  margin-left: -21px;
  width: 43px;
  height: 43px;
  background-image: url("../img/top-ico1.png");
}
.banner-wrap .top-ico1:hover{
  background-image: url("../img/top-ico1-hover.png");  
}

.section2{
  position: relative;
  width: 100%;
  height: 690px;
  background-image: url("../img/what-bj.png");
  background-repeat: no-repeat;
  background-position: center bottom;
  background-size: cover;
  background-color: #282828;
  text-align: center;
}
.section2 .title{
  position: relative;
  padding-top: 40px;
  height: 98px;
}
.section2 .title:after{
  content: "";
  position: absolute;
  height: 3px;
  bottom: 0;
  left: 0;
  right: 0;
  background: url("../img/border-bottom.png") center no-repeat;
}
.section2 .head-line{
  margin-top: 50px;
  margin-bottom: 60px;
  font-family: "微软雅黑";
  font-size: 24px;
  color: #898989;
}


.section5{
  position: relative;
}
.section5 .s5-title{
  position: relative;
  margin: 0 auto;
  padding-top: 45px;
  height: 98px;
  text-align: center;
  background-color: #282828;
}
.section5 .s5-title:after{
  content: "";
  position: absolute;
  height: 3px;
  bottom: 0;
  left: 0;
  right: 0;
  background: url("../img/border-bottom2.png") center no-repeat;
}
.section5 .s5-extra-bj{
  width: 100%;
  height: 53px;
  background-color: #282828;
}
.section5 .foot{
	
  background: url("../img/foot-bj.png") center;
  box-sizing: border-box;
  width: 100%;
  height: 166px;
  position: relative;
  top: -100px;
  left: 0px;
  padding-top: 165px;
}

.section5 .foot .adress , .section5 .foot .copyright{
	
  margin: 0 auto;
  width: 855px;
  font-family: "微软雅黑";
  font-size: 14px;
  color: #b2b2b2;
  text-align: center;
}
.section5 .foot .adress{
  color: #333333;
}