.home-header {
  margin-top: 25px;
  position: absolute;
  z-index: 20;
  width: 100%;
}
.home-header li {
  padding: 0 10px;
}
.home-header li a {
  font-size: 20px;
  color: #FEFEFE;
}
.home-header img {
  margin: 0 auto;
}
.home-header .header-ul {
  margin-right: 30px;
}
.video-container {
  height: 100%;
}
.video-container video {
  width: 100%;
  height: 100%;
}
.video-wrapper {
  position: relative;
  height: 100vh;
  overflow: hidden;
  background-color: #fff;
}
.video-mask {
  z-index: 40;
  position: fixed;
  top: 100%;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #000;
  transition: all 0.5s cubic-bezier(0.445, 0.05, 0.55, 0.95);
}
.video-mask.active {
  top: 0;
}
.video-close {
  position: absolute;
  width: 30px;
  height: 30px;
  top: 60px;
  right: 60px;
  background: url(http://benditoutiao.oss-cn-hangzhou.aliyuncs.com/fore-end/firstblood/close.png) no-repeat center center;
  background-size: cover;
  cursor: pointer;
}
.video-intro {
  box-sizing: border-box;
  padding: 20px;
  transition: .5s;
  height: 100%;
  width: 100%;
}
.video-intro video {
  width: 100%;
  height: 100%;
}
.mask {
  position: absolute;
  height: 100%;
  width: 100%;
  top: 0;
  left: 0;
  background: rgba(0, 0, 0, 0.7);
  z-index: 2;
}
.introduce {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 10;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  color: #FEFEFE;
  text-align: center;
}
.introduce .description {
  font-size: 70px;
  margin-bottom: 46px;
  line-height: 1;
  white-space: nowrap;
}
.introduce .video-button {
  display: inline-block;
  font-size: 40px;
  padding-left: 60px;
  background: url(http://benditoutiao.oss-cn-hangzhou.aliyuncs.com/fore-end/firstblood/play.png) no-repeat left center;
  cursor: pointer;
}
.video-arrow {
  width: 100px;
  height: 50px;
  position: absolute;
  left: 50%;
  bottom: 84px;
  background: transparent url(http://benditoutiao.oss-cn-hangzhou.aliyuncs.com/fore-end/firstblood/arrow.png) no-repeat center center;
  -webkit-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}