/* banner */
.banner {
  /* max-width: 1920px; */
  width: 100%;
  margin: 0 auto;
  position: relative;
}
.banner img {
  width: 100%;
}
/* btn_box */
.btn_box {
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
}
.btn_box .btn {
  width: 115px;
  height: 49px;
  border: 0;
  display: block;
}
.contact_us {
  background-image: url('../images/projects_case/contact_us.png');
}
.live_msg {
  background-image: url('../images/projects_case/live_msg.png');
  margin-top: 2px;
}
/* 新闻卡 */
.news_content {
  width: 1280px;
  margin: 0 auto;
  margin-top: 52px;
}
.el-tabs__header {
  margin: 0;
  margin-bottom: 8px;
}
.el-tabs__item,
.el-tabs__item.is-active {
  width: 248px;
  height: 59px;
  background: #E4E0E0;
  font-family: PingFangSC-Semibold;
  font-size: 26px;
  color: #666666;
  line-height: 59px;
  text-align: center;
  margin-right: 2px;
  transition: all 0.5s linear;
}
.el-tabs__item.is-active,
.el-tabs__item:hover {
  background: #4A90E2;
  color: #FFFFFF;
}
.el-tabs__nav-wrap::after {
  background-color: #4A90E2;
  z-index: 2;
}
.tab-content .list {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
}
.tab-content .list li {
  margin-top: 40px;
  overflow: hidden;
  position: relative;
  margin-left: 18px;
  margin-right: 18px;
}
.tab-content .list li .img_box {
  width: 280px;
  height: 210px;
  overflow: hidden;
}
.tab-content .list li .name {
  text-align: center;
  font-family: PingFangSC-Regular;
  font-size: 14px;
  color: #000000;
  padding-top: 20px;
}
.tab-content .list li mark {
  position: absolute;
  left: 0;
  top: 0;
  box-sizing: border-box;
  width: 100%;
  height: 210px;
  background: #1357b433;
  z-index: 20;
  opacity: 0;
  transform: skewX(45deg);
  visibility: hidden;
  transition: 360ms;
}
.tab-content .list li mark:before {
  content: "";
  width: 100%;
  height: 0%;
  border-left: 3px solid #1357b4;
  border-right: 3px solid #1357b4;
  box-sizing: border-box;
  position: absolute;
  left: 0;
  top: 0;
  transition: 320ms;
}
.tab-content .list li:hover mark:before {
  height: 100%;
  transition: 330ms 200ms;
}
.tab-content .list li img {
  transition: 0.5s linear;
}
.tab-content .list li:hover img {
  transform: scale(1.1);
}
.tab-content .list li mark:after {
  content: "";
  width: 0%;
  height: 100%;
  border-top: 3px solid #1357b4;
  border-bottom: 3px solid #1357b4;
  box-sizing: border-box;
  position: absolute;
  left: 0;
  top: 0;
  transition: 320ms;
}
.tab-content .list li:hover mark:after {
  width: 100%;
  transition: 330ms 200ms;
}
.tab-content .list li mark b {
  display: block;
  width: 46px;
  height: 46px;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-left: -23px;
  margin-top: -23px;
  z-index: 30;
}
.tab-content .list li mark b:before {
  content: "";
    width: 100%;
    height: 1px;
    background: #1357b4;
    position: absolute;
    left: 0;
    top: 23px;
    transform: translateX(-200px);
}
.tab-content .list li:hover mark b:before {
  transition: 355ms 180ms;
  transform: translateX(0);
}
.tab-content .list li mark b:after {
  content: "";
  width: 1px;
  height: 100%;
  background: #1357b4;
  position: absolute;
  left: 23px;
  top: 0;
  transform: translateY(-200px);
}
.tab-content .list li:hover  mark b:after {
  transition: 355ms 240ms;
  transform: translateY(0);
}
.tab-content .list li:hover mark {
  opacity: 1;
  transform: skewX(0);
  visibility: visible;
}
.tab-content .list li:hover mark:before {
  
}
.tab-content img {
  width: 280px;
  height: 210px;
  display: inline-block;
}
.page_box {
  margin-top: 55px;
  margin-bottom: 293px;
}