.banner {
  height: 734px;
  width: 100%;
  background-size: cover;
  background-position: center;
}
.banner h1 {
  font-size: 46px;
  text-align: center;
  color: #fff;
  padding-top: 200px;
  font-weight: bold;
  margin-bottom: 40px;
}
.banner p {
  text-align: center;
  color: #fff;
  font-size: 20px;
  line-height: 26px;
}
.content {
  width: 1140px;
  margin: -172px auto 0;
  background-color: #fff;
  padding-top: 38px;
  margin-bottom: 80px;
}
.content-wrap {
  width: 1100px;
  margin: 0 auto;
}
.content .blc {
  margin-bottom: 100px;
}
.content-wrap .tabs {
  font-size: 0;
  text-align: center;
  padding-bottom: 68px;
}
.content-wrap .tabs li {
  display: inline-block;
}
.content-wrap .tabs li a {
  padding: 12px 30px;
  background-color: #e6e6e6;
  color: #474747;
  display: inline-block;
  font-size: 16px;
  margin-right: 10px;
  text-decoration: none;
  margin-bottom: 20px;
  transition: all 0.6s;
}
.content-wrap .tabs li a:hover {
  background-color: #d9d9d9;
}
.content-wrap .tabs li.active a {
  color: #fff;
  background-color: #ed4a4a;
}
.content-wrap .tabs li.active a:hover {
  background-color: #d93f46;
}
.content-wrap .big-wrap {
  font-size: 0;
  margin-bottom: 20px;
}
.content-wrap .big-item {
  width: 540px;
  height: 300px;
  font-size: 0;
  /* background: blue; */
  position: relative;
  display: inline-block;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}
.content-wrap .big-item:nth-child(odd) {
  margin-right: 20px;
}
.content-wrap .big-item .wrap {
  width: 540px;
  height: 300px;
  overflow: hidden;
}
.content-wrap .big-item .wrap img {
  width: 540px;
  height: 300px;
  transition: all 0.6s;
}
.content-wrap .big-item:hover .wrap img {
  transform: scale(1.2);
}
.content-wrap .big-item span {
  padding: 10px 15px;
  position: absolute;
  bottom: 0;
  left: 10px;
  display: block;
  width: 314px;
  background-color: rgba(0, 0, 0, .7);
  transition: all 0.6s;
}
.content-wrap .big-item:hover span {
  background-color: none;
}
.content-wrap .big-item span b {
  color: #fff;
  display: block;
  font-size: 14px;
  margin-bottom: 10px;
  position: relative;
  z-index: 3;
}
.content-wrap .big-item span i {
  color: #fff;
  display: block;
  font-size: 18px;
  font-weight: bold;
  line-height: 24px;
  position: relative;
  z-index: 3;
}
.content-wrap .big-item span em {
  width: 0%;
  background-color: green;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  transition: all 0.6s;
  background-color: rgba(237, 74, 74, .7);
}
.content-wrap .big-item:hover span em {
  width: 100%;
}
.content-wrap .small-wrap {
  font-size: 0;
  margin-bottom: 20px;
}
.content-wrap .small-item {
  width: 345px;
  height: 210px;
  font-size: 0;
  /* background: blue; */
  position: relative;
  display: inline-block;
  margin-right: 32px;
  background-repeat: no-repeat;
  background-size: cover;
  background-position: center;
}
.content-wrap .small-item:nth-child(3n) {
  margin-right: 0px;
}
.content-wrap .small-item .wrap {
  width: 345px;
  height: 210px;
  overflow: hidden;
}
.content-wrap .small-item .wrap img {
  width: 345px;
  height: 210px;
  transition: all 0.6s;
}
.content-wrap .small-item:hover .wrap img {
  transform: scale(1.2);
}
.content-wrap .small-item span {
  padding: 10px 15px;
  position: absolute;
  bottom: 0;
  left: 0px;
  display: block;
  width: 286px;
  background-color: rgba(0, 0, 0, .7);
  transition: all 0.6s;
}
.content-wrap .small-item:hover span {
  background-color: none;
}
.content-wrap .small-item span i {
  color: #fff;
  display: block;
  font-size: 14px;
  font-weight: bold;
  line-height: 24px;
  position: relative;
  z-index: 3;
}
.content-wrap .small-item span em {
  width: 0%;
  background-color: green;
  position: absolute;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 1;
  transition: all 0.6s;
  background-color: rgba(237, 74, 74, .7);
}
.content-wrap .small-item:hover span em {
  width: 100%;
}
.content-wrap .big-item a,
.content-wrap .small-item a {
  display: block;
}



@media screen and (max-width: 768px){
  .banner {
    height: 300px;
  }
  .banner h1 {
    padding-top: 80px;
    font-size: 30px;
  }
  .banner p {
    line-height: 18px;
    font-size: 14px;
    width: 80%;
    margin: 0 auto 10px;
  }
  .content {
    margin-top: 0px;
    width: 100%;
    margin-bottom: 30px;
  }
  .content-wrap {
    width: 100%;
  }
  .content-wrap .tabs li a {
    padding: 8px 12px;
    font-size: 14px;
    margin-bottom: 10px;
  }
  .content-wrap .tabs {
    padding-bottom: 30px;
  }
  .content-wrap .big-item,
  .content-wrap .small-item {
    width: 100%;  
    height: 300px;
    margin-right: 0px;
  }
  .content-wrap .big-item img,
  .content-wrap .small-item img {
    opacity: 0;
  }
  .content-wrap .big-item .wrap,
  .content-wrap .small-item .wrap {
    width: 100%;
    height: auto;
  }
  .content-wrap .big-item span,
  .content-wrap .small-item span {
    width: 100%;
    left: 0;
    box-sizing: border-box;
    padding: 8px;
  }
  .content-wrap .big-item:nth-child(odd),
  .content-wrap .small-item:nth-child(odd) {
    margin-right: 0;
  }
  .content-wrap .big-wrap,
  .content-wrap .small-wrap {
    margin-bottom: 0;
  }
  .content-wrap .big-item span b {
    font-size: 12px;
    margin-bottom: 5px;
  }
  .content-wrap .big-item span i {
    font-size: 14px;
  }
  .content .blc {
    margin-bottom: 30px;
  }
}