.header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  padding: 21px 32px 21px 24px;
  z-index: 99;
}
.ea55_com_header {
  background: rgba(0, 0, 0, 1);
  transition: background 1s;
}
.mantle-item {
  position: fixed;
  right: 0;
  left: 0;
  height: 400px;
  z-index: 1;
}
.header-mantle {
  top: 0;
  z-index: 9;
  background-image: linear-gradient(#000000, #0000007a, transparent)
}
.footer-mantle {
  bottom: 0;
  background-image: linear-gradient(transparent, #0000007a, #000000)
}
.header-left .logo {
  width: 170px;
	height: 40px;
}
.logo_img_375 {
  display: none;
}
.containter {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}
.main-layout {
  /* background: url('../images/demo_ANI.png') no-repeat;
  background-size: contain; */
}
.menu-area {
  /* margin-right: 149px; */
}

.menu-area-main {
  opacity: 0;
  display: flex;
}

.menu-area-main li:hover a,
.menu-area-main li:focus a {
	color: #fff;
}

.menu-area-main li.active a {
	color: #fff;
}

.main-menu ul>li {
  position: inherit;
  display: inline-block;
  vertical-align: middle;
}

.main-menu ul li:first-child {
  margin-left: 0;
}

.main-menu ul>li a {
  padding: 0 22.5px;
  line-height: 25px;
  font-size: 18px;
  display: block;
  font-weight: 500;
  color: #B0B0B0;
  text-transform: uppercase;
}

.line {
  width: 16px;
  height: 2px;
  background-color: #d7d7d7;
  margin-bottom: 3px;
  transition: 0.4s;
}

.change .line.line1 {
  /* -webkit-transform: rotate(-45deg) translate(-9px, 6px); */
  transform: rotate(-45deg) translate(-8px, 1px);
}

.change .line.line2 {
  opacity: 0
}

.change .line.line3 {
  /* -webkit-transform: rotate(45deg) translate(-8px, -8px); */
  transform: rotate(45deg) translate(-6px, 1px);
}
.banner-main {
  position: relative;
  height: 100vh;
}
.banner-con .banner-con-video {
  height: 100vh;
  display: none;
}
.banner-con .banner-con-video:first-child {
  display: block;
}
.banner-con .banner-con-video .video-js,
.banner-con .banner-con-video video {
  width: 100%;
  height: 100%;
  object-fit: cover
}
.banner-con-box {
  height: 100%;
}
.banner-text {
  position: absolute;
  bottom: 88px;
  left: 50%;
  z-index: 99;
  transform: translate(-50%, 0);
  color: rgba(255, 255, 255, 0.6);
}
.banner-text li:hover,
.banner-text .active {
  color: rgba(255, 255, 255, 1);
  border-bottom: 1px solid #fff;
}
.banner-text li {
  cursor: pointer;
  font-size: 36px;
  line-height: 50px;
  margin-right: 64px;
  border-bottom: 1px solid transparent;
}
.banner-text li:last-child {
  margin-right: 0;
}

.cases_container {
  background-color: #000;
}
.case-item {
  /* width: 33.333%; */
  width: 100vw;
}
.case-item img{
  width: 11.111%;
  height: auto;
  padding: 1px;
  /* padding-top: 59%; */
  margin-bottom: 1px;
  background-size: 100%;
}
.case-1024 {
  display: none;
}
.mantle {
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 9;
}
.mantle img {
  width: auto;
  height: 140px;
}
.mantle-left {
  width: 33.333%;
  /* background-color: rgba(0, 0, 0, 0.7); */
}
.mantle-right {
  width: 66.667%;
  
}
.mantle-i {
  opacity: 1;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.7);
}
.mantle-right .mantle-i:hover,
.mantle-left .mantle-i:hover {
  opacity: 0;
  transition-duration: 0.6s;
}

.join-us-main {
  width: 100%;
  height: 100vh;
  background: url('../images/join_us.png') no-repeat;
  background-size: 100% 100%;
}

.join-title, .join-desc {
  text-align: center;
  color: #fff;
}

.join-title {
  font-size: 80px;
  line-height: 112px;
  letter-spacing: 5px;
  margin-bottom: 30px;
}

.join-desc {
  font-size: 18px;
  line-height: 35px;
  letter-spacing: 11px;
  width: 74%;
  margin: 0 auto;
}

.recruit-info {
  padding: 200px 0;
}
.recruit-info-list {
  width: 50%;
  margin: 0 auto;
}
.office-branch {
  margin-top: 140px;
}
.office-title {
  font-size: 60px;
  color: #0AB59E;
  line-height: 84px;
}
.branch-item {
  margin-top: 100px;
}
.branch-title {
  padding-bottom: 10px;
  font-size: 18px;
  line-height: 25px;
  color: #ffffff;
  border-bottom: 1px solid #333333;
}
.branch-title-left {

  color: #0AB59E;
}
.branch-content {
  margin-top: 24px;
  font-size: 16px;
  line-height: 22px;
  color: #b2b2b2;
}
.branch-content-title {
  margin-bottom: 10px;
}
.branch-duty {
  margin-top: 20px;
}
.branch-content ul li {
  margin-bottom: 10px;
}
.branch-content ul li>span {
  margin-right: 10px;
}
.text-mail {
  margin-left: 20px;
  font-size: 24px;
  line-height: 33px;
  color: #cccccc;
}
.text-mail>span {
  margin: 0 10px;
}
.recruit {
  padding: 42px 0;
  background-color: #161616;
}
.shu {
  width: 1px;
  height: 14px;
  background-color: #fff;
  margin:  0 40px;
}
.recruit p {
  font-size: 22px;
  line-height: 30px;
  color: #cccccc;
}
.recruit p:hover {
  color: #0AB59E;
}

.copyright {
  position: relative;
  z-index: 99;
  width: 90%;  
  border-top: 1px solid #444444;
  padding: 31px 0 32px;
  margin: 0 auto;
  margin-top: 77px;
  color: #999999;
}
.copyright a {
  color: #999999;
}
.about-us {
  height: 100vh;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.about-us-item {
  height: 100vh;
  width: 33.33%;
  margin-right: 25px;
  /* padding: 0 80px 0 58px; */
}

.about-us-item:last-child {
  margin-right: 0;
}

.about-us-item1 {
  width: 32%;
  padding-left: 82px;
  line-height: 40px;
  color: #e6e6e6;
}
.about-us-right {
  width: 68%;
  display: flex;
  justify-content: space-between;
}
.about-us-item2 {
  background: url('../images/about_us1.png') no-repeat;
  background-size: 100% 100%;
}
.about-us-item3 {
  background: url('../images/about_us2.png') no-repeat;
  background-size: 100% 100%;
}
.about-us-item4 {
  background: url('../images/about_us3.png') no-repeat;
  background-size: 100% 100%;
}
.about-text {
  width: 66%;
  margin: 0 auto;
}
.about-text i {
  font-style: normal;
  font-size: 80px;
  line-height: 95px;
  font-weight: 100;
  color: #cccccc;
}
.about-text span {
  color: #cccccc;
}
.about-text p {
  margin-top: 20px;
  color: #B3B3B3;
  line-height: 22px;
}
.about-us-info {
  position: absolute;
  bottom: 84px;
  z-index: 99;
  width: 100%;
} 
.about-us-icon-box {
  /* position: absolute;
  bottom: 84px;
  z-index: 99; */
  /* width: 20vw; */
  display: none;
}
.about-us-icon {
  margin-right: 10px;
}
.about-us-icon img{
  width: 18px;
  height: 18px;
}