.banner {
  position: relative;
  width: 100%;
  height: 100vh;
  background: url(../images/environment-banner.jpg) fixed;
}
.banner .infobox {
  display: flex;
  align-items: center;
  width: 80%;
  height: 100vh;
  margin: 0 auto;
}
.banner .infobox .info {
  margin: 0 auto;
  text-align: center;
}
.banner .infobox .info p {
  font-size: 24px;
  font-weight: 200;
  color: #fff;
}
.banner .infobox .info h4 {
  margin: 20px 0 60px 0;
  font-size: 46px;
  color: #ffffff;
  font-weight: 300;
}
.banner .factory {
  position: absolute;
  bottom: 20px;
  right: 220px;
  display: flex;
  flex-direction: column;
  align-items: center;
}
.banner .factory img {
  padding-bottom: 10px;
}
.banner .factory span {
  color: #fff;
}
.banner .mouse-prompt {
  position: absolute;
  display: flex;
  flex-direction: column;
  align-items: center;
  left: 50%;
  bottom: 30px;
  transform: translate(-50%);
  animation: mouse 2s linear infinite;
}
.banner .mouse-prompt .icon-shubiao {
  color: #fff;
  opacity: 0.6;
  font-size: 24px;
}
.banner .mouse-prompt p {
  text-align: center;
  font-weight: 100;
  font-size: 16px;
  color: #fff;
  opacity: 0.6;
}
@keyframes mouse {
  0% {
    bottom: 30px;
    animation-timing-function: ease-in;
    opacity: 0;
  }
  25% {
    bottom: 25px;
    opacity: 0.8;
  }
  50% {
    bottom: 20px;
    opacity: 0.4;
  }
  75% {
    bottom: 15px;
    opacity: 0.1;
  }
  100% {
    bottom: 10px;
    animation-timing-function: ease-out;
    opacity: 0;
  }
}
.video-list {
  width: 80%;
  margin: 0 auto;
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  padding: 100px 0 60px;
}
.video-list .video {
  margin-bottom: 46px;
  margin-right: 60px;
}
.video-list .video video {
  width: 460px;
  height: 280px;
  overflow: hidden;
  object-fit: fill;
  border: 1px solid #e3e3e3;
  border-radius: 4px;
}
.video-list .video .tittle {
  text-align: center;
  padding-top: 10px;
}
.video-list .video .tittle p {
  font-size: 16px;
  color: #555;
}
.video-list .video:nth-child(3n) {
  margin-right: 0;
}
@media screen and (max-width: 992px) {
  .banner .infobox .info p {
    font-size: 18px !important;
  }
  .banner .infobox .info h4 {
    font-size: 24px !important;
  }
  .banner .factory {
    bottom: 135px;
    right: 50%;
    transform: translate(50%);
  }
  .video-list {
    width: 90%;
    justify-content: center;
    overflow: hidden;
  }
  .video-list .video {
    margin-right: 0;
  }
}