html,
body {
  height: auto;
  position: relative;
}
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: "微软雅黑";
}
a {
  text-decoration: none !important;
  -webkit-tap-highlight-color: transparent;
  color: inherit;
}
ul,
li {
  list-style: none;
}
.comm_cont {
  width: 100%;
  height: auto;
  min-height: 100vh;
  background-color: #FFFFFF;
}
#head_box {
  width: 100%;
  height: auto;
  position: fixed;
  top: 0px;
  left: 0px;
  z-index: 3;
  background-color: #FFFFFF;
  transition: 0.5s;
}
.head_boxA {
  box-shadow: 0px 6px 6px rgba(0, 0, 0, 0.2);
  transition: 0.5s;
}
.xc_cont {
  width: 100%;
  height: auto;
  min-height: 100vh;
  padding-top: 100px;
}
.xc_cont .xc_box {
  width: 100%;
  height: auto;
  min-height: 600px;
}
.xc_cont .xc_box .banner_img {
  width: 100%;
  height: auto;
}
.xc_cont .xc_box .banner_img img {
  width: 100%;
  display: block;
}
.xc_cont .xc_box .xc_div {
  width: 1400px;
  height: auto;
  min-height: 600px;
  margin: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  align-items: flex-start;
  padding-bottom: 100px;
}
.xc_cont .xc_box .xc_div .xjVideo_box {
  width: 100%;
  height: 44px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}
.xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_div {
  width: 188px;
  height: 44px;
  border: 1px solid #c9c9c9;
  font-size: 16px;
  color: #999999;
  margin-right: 60px;
  cursor: pointer;
  display: flex;
  justify-content: center;
  align-items: center;
}
.xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_active a:hover {
  color: #FFFFFF;
}
.xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_active {
  background-color: #233b69;
  color: #FFFFFF !important;
  border: 0px;
}
.xc_cont .xc_box .xc_div .cont_ul {
  width: 100%;
  height: auto;
  position: relative;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li {
  width: 100%;
  height: auto;
  position: absolute;
  top: 0px;
  left: 0px;
  display: none;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li:first-child {
  display: block;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul {
  width: 100%;
  height: auto;
  margin-top: 60px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
  align-items: flex-start;
  flex-wrap: wrap;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li {
  width: 345px;
  height: 280px;
  margin-left: 47px;
  margin-bottom: 30px;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img {
  width: 100%;
  height: 229px;
  position: relative;
  overflow: hidden;
  cursor: pointer;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img img {
  width: 100%;
  display: block;
  transition: 0.5s;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img .video_btn {
  width: 50px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-top: -25px;
  margin-left: -25px;
  transition: 0.5s;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li p {
  width: 100%;
  text-align: center;
  font-size: 16px;
  color: #333333;
  line-height: 45px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li:nth-child(3n+1) {
  margin-left: 0px;
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li:hover img:first-child {
  transform: scale(1.1);
}
.xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li:hover .video_btn {
  animation: btn_op 1s ;
}
@keyframes btn_op {
  70% {
    opacity: 0;
  }
  100% {
    opacity: 1;
  }
}
@media only screen and (max-width: 1460px) {
  .xc_cont .xc_box .xc_div {
    width: 1200px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li {
    width: 295px;
    height: 242px;
    margin-left: 30px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img {
    height: 196px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li p {
    font-size: 15px;
  }
}
@media only screen and (max-width: 1250px) {
  .xc_cont .xc_box .xc_div {
    width: 950px;
    min-height: 850px;
  }
  .xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_div {
    width: 155px;
    height: 40px;
    font-size: 15px;
    margin-right: 40px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul {
    margin-top: 35px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li {
    width: 225px;
    height: 195px;
    margin-left: 28px;
    margin-bottom: 20px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img {
    height: 150px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li p {
    font-size: 15px;
  }
}
@media only screen and (max-width: 970px) {
  .xc_cont .xc_box .xc_div {
    width: 750px;
    min-height: 700px;
  }
  .xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_div {
    width: 130px;
    height: 38px;
    font-size: 14px;
    margin-right: 30px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul {
    margin-top: 20px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li {
    width: 185px;
    height: 159px;
    margin-left: 15px;
    margin-bottom: 10px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img {
    height: 123px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img .video_btn {
    width: 40px;
    margin-top: -20px;
    margin-left: -20px;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li p {
    font-size: 13px;
    line-height: 35px;
  }
}
@media only screen and (max-width: 767px) {
  .xc_cont {
    padding-top: 1.842105rem;
  }
  .xc_cont .xc_box .xc_div {
    width: 96%;
    margin: auto;
    min-height: 10.5263rem;
    padding-bottom: 1.0526rem;
  }
  .xc_cont .xc_box .xc_div .xjVideo_box .xjVideo_div {
    width: 3.0263rem;
    height: 0.9211rem;
    font-size: 0.3421rem;
    margin-right: 0.5263rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul {
    margin-top: 0.5263rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li {
    width: 4.4737rem;
    height: 3.9474rem;
    margin-left: 0.3947rem;
    margin-bottom: 0.2632rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img {
    height: 2.9737rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li .xjVideo_img .video_btn {
    width: 1.0526rem;
    margin-top: -0.5263rem;
    margin-left: -0.5263rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li p {
    font-size: 0.3158rem;
    line-height: 0.8421rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li:nth-child(3n+1) {
    margin-left: 0.3947rem;
  }
  .xc_cont .xc_box .xc_div .cont_ul .cont_li .xjVideo_ul .xjVideo_li:nth-child(2n+1) {
    margin-left: 0rem;
  }
}