body {
  background-color: #F1F1F1;
  /* letter-spacing: 1.5px;
  font-family: Microsoft YaHei; */
}
.body .content .introduction2 {
  width: 860px;
  position: relative;
  margin-top: -20px;
  left: 188px;
  font-size: 14px;
  color: #4E4E4E;
  letter-spacing: 1.5px;
  line-height: 24px;
  font-weight: 300;
}
.provideo,.provideo2,.provideo3{
  width: 545px;
  height: 270px;
  /* background-repeat: no-repeat;
  background-image: url(../images/videonb.jpg);
  -webkit-background-size: 100%;
  background-size: 100%; */
  float: left;
}
.provideo{
  margin-left: 80px;
  background-repeat: no-repeat;
  background-image: url(../images/videobdh.jpg);
  -webkit-background-size: 100%;
  background-size: 100%;
}.provideo2{
  margin-left: 20px;
  background-repeat: no-repeat;
  background-image: url(../images/videotj.jpg);
  -webkit-background-size: 100%;
  background-size: 100%;
}
.provideo3{
  margin-top: 70px;
  margin-left: 80px;
  background-repeat: no-repeat;
  background-image: url(../images/videonb.jpg);
  -webkit-background-size: 100%;
  background-size: 100%;
}
.provideo img,.provideo2 img,.provideo3 img{
  width: 104px;
  height: 40px;
  margin-top: 114px;
  margin-left: 220px;
}






.header-bg {
  background-image: linear-gradient(-269deg, #21425E 13%, #1A3E5C 76%);
  width: 100%;
  height: 125px;
  position: relative;
}
.header {
  height: 125px;
  background-color: rgba(24, 52, 78, 0.85);
  position: relative;
  top: -125px;
  width: 1440px;
  margin: 0 auto;
  z-index: 10;
  letter-spacing: 2px;
}
.header .logo {
  width: 430px;
  height: 65px;
  background-repeat: no-repeat;
  background-image: url(../images/logo.png);
  -webkit-background-size: 100%;
  background-size: 100%;
  position: relative;
  top: 30px;
  left: 100px;
}
.header .nav {
  width: 600px;
  position: relative;
  top: -5px;
  left: 604px;
  display: flex;
  justify-content: space-between;
  font-size: 20px;
}
.header a {
  text-decoration: none;
  color: #C5C5C5;
}
.header .nav-item {
  color: #C5C5C5;
  position: relative;
  cursor: pointer;
  width: 100px;
  text-align: center;
}
.header .nav-item .nav-down-icon {
  position: absolute;
  top: 32px;
  left: 40px;
  display: none;
  font-size: 12px;
}
.header .nav-item.activity {
  color: #00A0E9;
}
.header .nav-item.mouse-on {
  color: #9EE1FF;
}
.header .nav-item.mouse-on .nav-down-icon {
  display: block;
}
.header .nav-item.mouse-on .sub-nav {
  display: flex;
}
.header .mouse-on {
  color: #9EE1FF;
}
.header .sub-nav-bg {
  background-color: rgba(77, 89, 100, 0.85);
  width: 1440px;
  height: 48px;
  line-height: 48px;
  position: absolute;
  left: -604px;
  top: 65px;
  display: none;
}
.header .sub-nav-bg.mouse-on {
  display: block;
}
.header .sub-nav {
  color: #E9E9E9;
  justify-content: space-around;
  position: relative;
  top: 38px;
  height: 148px;
  line-height: 48px;
  display: none;
}
.header .sub-nav .sub-nav-item {
  width: 110px;
  text-align: center;
  margin: 0 20px;
}
.header .sub-nav .sub-nav-item:hover {
  color: #9EE1FF;
}
.header .to_english {
  width: 53px;
  height: 31px;
  line-height: 31px;
  background: rgba(77, 77, 77, 0.7);
  border: 1px solid #E5E5E5;
  text-align: center;
  font-size: 20px;
  color: #C5C5C5;
  position: absolute;
  top: 55px;
  right: 100px;
}
.body {
  width: 1440px;
  margin: 0 auto;
  position: relative;
  top: -123px;
  /* margin-bottom: -200px; */
  /* z-index: 5; */
}
.body .banner {
  width: 100%;
  height: 457px;
  background-image: url(../images/aboutNobao.jpg);
  -webkit-background-size: 100%;
  background-size: 100%;
}
.body .banner p {
  height: 57px;
  line-height: 57px;
  /* border-top: 1px #fff solid; */
  border-bottom: 1px #fff solid;
  font-size: 28px;
  color: #FFFFFF;
  letter-spacing: 2.5px;
  position: relative;
  top: 210px;
  left: 125px;
  padding: 0 20px;
  display: inline-block;
}
.body .banner p span {
  font-size: 22px;
  padding-left: 10px;
}
.body .nav {
  width: 100%;
  height: 77px;
  line-height: 77px;
  background: #E6E6E6;
  display: flex;
  justify-content: center;
  margin-top: 20px;
}
.body .nav .item {
  width: 290px;
  text-align: center;
  font-size: 18px;
  color: #323232;
  letter-spacing: 2.5px;
  position: relative;
  padding-left: 20px;
  cursor: pointer;
}
.body .nav .item i {
  color: #505050;
  font-size: 26px;
  position: absolute;
  left: 65px;
}
.body .nav .item:hover {
  color: #00A0E9;
}
.body .nav .item:hover i {
  color: #00A0E9;
}
.body .nav .item.activity {
  background-image: url(../images/bg_button.png);
  -webkit-background-size: 100%;
  background-size: 100%;
  height: 99px;
}
.body .content {
  width: 1240px;
  margin: 60px auto 80px;
  position: relative;
}
.body .content .content-item {
  display: none;
}
.body .content .activity.content-item {
  display: block;
}
.body .content .head-bg {
  background-image: linear-gradient(-269deg, #B7D5ED 13%, #DCECF7 76%);
  /* width: 669px; */
  height: 158px;
  line-height: 158px;
  padding-left: 571px;
  font-size: 24px;
  color: #006796;
  letter-spacing: 1.5px;
}
.body .content .img {
  width: 494px;
  height: 353px;
  position: relative;
  top: 35px;
  left: 25px;
  -webkit-background-size: 100%;
  background-size: 100%;
  position: absolute;
}
.body .content .content-item1 .img {
  background-image: url(../images/pic8@2x.jpg);
}
.body .content .content-item2 .img {
  background-image: url(../images/content-item2img.jpg);
  height: 294px;
}
.body .content .content-item3 .img {
  background-image: url(../images/lsgy.jpg);
  height: 294px;
}
.body .content .introduction {
  width: 467px;
  position: relative;
  margin-top: 25px;
  left: 571px;
  font-size: 14px;
  color: #4E4E4E;
  letter-spacing: 1.5px;
  line-height: 24px;
  font-weight: 300;
}

.body .content .nobao-bg {
  width: 125px;
  height: 467px;
  position: absolute;
  top: 199px;
  right: 25px;
  background-image: url(../images/pic9@2x.png);
  -webkit-background-size: 100%;
  background-size: 100%;
  background-repeat: no-repeat;
}
.body .content .concept-list {
  width: 860px;
  position: relative;
  margin-top: 80px;
  left: 188px;
}
.body .content .concept-list .concept-item {
  display: flex;
  margin-bottom: 80px;
}
.body .content .concept-list .concept-item .icon {
  width: 100px;
  height: 88px;
  border: 2px #BBBBBB solid;
  border-radius: 10px;
}
.body .content .concept-list .concept-item .icon .iconfont {
  font-size: 30px;
  position: relative;
}
.body .content .concept-list .concept-item .icon .icon-B {
  color: #1B9329;
  left: 14px;
  top: 12px;
}
.body .content .concept-list .concept-item .icon .icon-B1 {
  color: #7EBF2A;
  top: 17px;
  left: 34px;
}
.body .content .concept-list .concept-item .text {
  width: 810px;
  margin-left: 30px;
  position: relative;
  top: -6px;
}
.body .content .concept-list .concept-item .text .title {
  margin-bottom: 18px;
  height: 28px;
  position: relative;
  font-size: 20px;
  color: #4E4E4E;
  letter-spacing: 1.5px;
}
.body .content .concept-list .concept-item .text .detail {
  font-size: 14px;
  color: #989898;
  letter-spacing: 1.5px;
  text-align: justify;
  line-height: 24px;
}
.body .content .history-list {
  width: 940px;
  position: relative;
  margin-top: 168px;
  left: 95px;
  border-left: 2px #81ACDC solid;
  margin-left: 100px;
}
.body .content .history-list .history-item {
  width: 500px;
  margin-left: 86px;
  margin-bottom: 100px;
  position: relative;
}
.body .content .history-list .history-item .title {
  font-size: 24px;
  color: #006796;
}
.body .content .history-list .history-item .detail {
  font-size: 14px;
  color: #4E4E4E;
  letter-spacing: 1.8px;
  margin: 15px 0;
  line-height: 24px;
}
.body .content .history-list .history-item img {
  width: 292px;
  height: 167px;
}
.body .content .history-list .history-item .year {
  width: 106px;
  height: 106px;
  line-height: 106px;
  background: #B7D5ED;
  border: 2px solid #81ACDC;
  border-radius: 50%;
  font-size: 32px;
  color: #FFFFFF;
  text-align: center;
  position: absolute;
  top: -35px;
  left: -144px;
}
.body .content .member .title {
  background-image: linear-gradient(-269deg, #B7D5ED 13%, #DCECF7 76%);
  width: 1240px;
  height: 100px;
  line-height: 100px;
  text-align: center;
  font-size: 26px;
  color: #006796;
  letter-spacing: 1.5px;
}
.body .content .member .member-list {
  width: 1240px;
  position: relative;
  display: flex;
  flex-wrap: wrap;
}
.body .content .member .member-list .center-line {
  width: 96px;
  background-color: #F1F1F1;
  height: 1654px;
  position: absolute;
  top: 41px;
  left: 572px;
}
.body .content .member .member-list .center-line .line {
  margin: 0 auto;
  width: 1px;
  background: #9F9F9F;
  height: 100%;
}
.body .content .member .member-list .member-item {
  width: 50%;
  height: 338px;
  border-bottom: 1px #9F9F9F solid;
}
.body .content .member .member-list .member-item .name {
  width: 488px;
  position: relative;
  top: 64px;
  left: 142px;
  font-size: 20px;
  color: #006796;
  letter-spacing: 2px;
}
.body .content .member .member-list .member-item .name .iconfont {
  font-size: 45px;
  position: absolute;
  top: -10px;
  left: -70px;
  color: #00A0E9;
}
.body .content .member .member-list .member-item .detail {
  position: relative;
  width: 488px;
  top: 100px;
  left: 72px;
  font-size: 14px;
  color: #4E4E4E;
  letter-spacing: 1.5px;
  line-height: 24px;
}
.footer {
  width: 100%;
  height: 125px;
  background: #4A565D;
  font-size: 16px;
  color: #FFFFFF;
  letter-spacing: 2px;
  margin-top: 90px;
}
.footer .copyright {
  width: 1240px;
  margin: 0 auto;
  padding: 55px;
  text-align: right;
}