.header {
  height: 100px;
  line-height: 100px;
}
.header .nav {
  display: flex;
  justify-content: space-between;
}
.header .nav .logo {
  height: 80px;
}
.header .nav .logo img {
  height: 100%;
}
.header .nav .nav-list {
  display: flex;
  width: 50vw;
  justify-content: space-between;
}
.header .nav .nav-list li {
  position: relative;
}
.header .nav .nav-list li:hover a::before {
  width: 100%;
}
.header .nav .nav-list li .active a::before {
  width: 100%;
}
.header .nav .nav-list li a {
  transition: all 0.2s;
  display: inline-block;
  position: relative;
}
.header .nav .nav-list li a:before {
  width: 0;
  height: 3px;
  position: absolute;
  left: 50%;
  bottom: 15px;
  z-index: 10;
  transform: translateX(-50%);
  -webkit-transform: translateX(-50%);
  background: #e70012;
  content: "";
  transition: all 0.3s;
  -webkit-transition: all 0.3s;
}
.header .nav .nav-list-show {
  display: none;
}
.header .nav .nav-list-show i {
  font-size: 30px;
  color: black;
}
.header .nav .sign {
  margin-left: 5vw;
  font-size: 1.5vw;
}
.header .nav .sign i {
  color: red;
  font-size: 1.5vw;
}
.banner .banner-list {
  height: 100%;
}
.banner .banner-list img {
  width: 100%;
  height: 100%;
}
.search-contain {
  padding: 2% 0 4%;
  min-height: 480px;
}
.search-contain .tit-top h2 {
  color: #333;
  font-size: 30px;
  text-align: center;
  letter-spacing: 2px;
}
.search-contain .tit-top div {
  text-align: center;
}
.search-contain .tit-top div h3 {
  font-size: 18px;
  color: #999999;
  position: relative;
  text-transform: uppercase;
  display: inline-block;
}
.search-contain .tit-top div h3:after {
  content: "";
  width: 95px;
  height: 1px;
  background-color: #999;
  position: absolute;
  right: -106px;
  bottom: 15px;
}
.search-contain .tit-top div h3:before {
  content: "";
  width: 95px;
  height: 1px;
  background-color: #999;
  position: absolute;
  left: -106px;
  bottom: 15px;
}
.search-contain .cert-nav {
  text-align: center;
  max-width: 760px;
  width: 96%;
  margin: 0 auto;
  padding: 50px 0 30px;
}
.search-contain .cert-nav span {
  color: #333;
  cursor: pointer;
  padding-bottom: 5px;
  display: inline-block;
  margin-right: 40px;
  font-size: 18px;
  letter-spacing: 1px;
}
.search-contain .cert-nav .cur {
  border-bottom: 2px solid #e70012;
}
.search-contain .video-item {
  width: 100%;
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
}
.search-contain .video-item dd {
  width: 22%;
  margin-right: 3%;
  margin-bottom: 13px;
  text-align: center;
}
.search-contain .video-item dd .show-video {
  position: relative;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
}
.search-contain .video-item dd .show-video:hover span {
  opacity: 1;
}
.search-contain .video-item dd .show-video span {
  position: absolute;
  width: 90%;
  height: 90%;
  left: 5%;
  top: 5%;
  background: url('../img/icon1.png') no-repeat center / cover;
  opacity: 0;
  transition: all ease-out 300ms;
  cursor: pointer;
}
.search-contain .video-item dd .show-video p {
  font-size: 16px;
  line-height: 40px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
footer {
  background-color: #463433;
}
footer .era {
  padding: 2% 0 0;
  display: flex;
  justify-content: space-between;
}
footer .era .era-left {
  width: 40%;
}
footer .era .era-left img {
  border: 0;
  height: 174px;
  vertical-align: middle;
  max-width: 100%;
  width: 388px;
}
footer .era .era-right {
  width: 55%;
  display: flex;
  justify-content: space-between;
}
footer .era .era-right .dl-01 {
  width: 23%;
  float: left;
  color: #fff;
  font-size: 14px;
}
footer .era .era-right .dl-01 dt {
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 10px;
  color: #fff;
  display: block;
}
footer .era .era-right .dl-01 dt a {
  font-size: 16px;
  font-weight: bold;
  margin-bottom: 10px;
  color: #fff;
  display: block;
}
footer .era .era-right .dl-01 dt a:hover {
  color: #e70012;
}
footer .era .era-right .dl-01 dd a {
  font-size: 14px;
  line-height: 30px;
  margin-bottom: 10px;
  color: #fff;
  display: block;
}
footer .era .era-right .dl-01 dd a:hover {
  color: #e70012;
}
footer .era .era-right .dl-03 {
  flex: 1;
}
footer .logo {
  padding-bottom: 2%;
  padding: 2% 0 0;
  display: flex;
  justify-content: space-between;
}
footer .logo .l {
  display: flex;
}
footer .logo .l img {
  height: 55px;
  width: 55px;
}
footer .logo .l p {
  margin-left: 10px;
  color: #fff;
}
footer .logo .r {
  width: 491px;
  height: 55px;
}
footer .logo .r img {
  height: 100%;
}
footer .b {
  line-height: 60px;
  text-align: center;
  color: #fff;
  margin-top: 30px;
  font-size: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.3);
}
#nav li.on > a:before {
  width: 100%;
}
@media screen and (max-width: 1200px) {
  .header .nav .sign {
    display: none;
  }
  .header .nav .nav-list-show {
    display: block;
  }
  .header .nav .nav-list {
    display: none;
  }
}
@media screen and (max-width: 768px) {
  .header {
    height: 80px;
    line-height: 80px;
  }
  .header .nav .logo {
    height: 60px;
  }
  .header .nav .sign {
    display: none;
  }
  .header .nav .nav-list-show {
    display: block;
  }
  .header .nav .nav-list {
    display: none;
  }
  .search-contain .video-item dd {
    width: 45%;
  }
  footer .era {
    display: none;
  }
  footer .logo {
    display: flex;
    justify-content: center;
    align-items: center;
  }
  footer .logo .l {
    display: none;
  }
  footer .logo .r img {
    width: 100%;
  }
  footer .b {
    line-height: 8vw;
  }
}