.w1200 {
  width: 1200px;
  margin: 0 auto;
  position: relative;
}
/*视频弹出层*/
.video_fixd {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  background-color: rgba(9, 9, 9, 0.63);
  width: 100%;
  height: 100%;
  z-index: 999;
}
.video_fixd .seemore {
  width: 1300px;
  height: 620px;
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  display: flex;
  justify-content: center;
}
.video_fixd video {
  width: 1000px;
  outline: none;
}
.video_fixd .close {
  width: 40px;
  height: 40px;
  position: absolute;
  right: 60px;
  top: -35px;
  cursor: pointer;
}
.video_fixd .close img {
  width: 36px;
  height: 36px;
}
.banner {
  width: 100%;
  height: 680px;
  position: relative;
}
.banner img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.banner_text {
  position: absolute;
  top: 0;
  left: 50%;
  transform: translateX(-50%);
}
.banner_text div {
  margin-top: 240px;
  width: 930px;
  font-size: 16px;
  color: #89603e;
  letter-spacing: 2px;
  line-height: 40px;
  text-indent: 2em;
}
.warp {
  width: 100%;
  background: url(../img/bg.png);
}
.nav {
  width: 1200px;
  display: flex;
  justify-content: center;
  position: absolute;
  top: -200px;
}
.nav .nav_item {
  margin-right: 120px;
  cursor: pointer;
  opacity: 0.5;
}
.nav .active_nav {
  opacity: 1;
}
.video_list {
  padding-top: 100px;
  display: flex;
  flex-wrap: wrap;
}
.video_list .item {
  margin-right: 30px;
  margin-bottom: 40px;
  cursor: pointer;
}
.video_list .item:nth-child(3n) {
  margin-right: 0;
}
.video_list .item:hover .play {
  opacity: 1;
  transform: scale(1);
}
.video_list .item:hover .video_img {
  transform: scale(1.1);
}
.video_list .video_box {
  width: 380px;
  height: 214px;
  border-radius: 4px;
  overflow: hidden;
  position: relative;
  display: flex;
  justify-content: center;
  align-items: center;
}
.video_list .video_box .video_img {
  width: 100%;
  height: 100%;
  transition: all 0.4s;
}
.video_list .video_box .play {
  position: absolute;
  opacity: 0;
  transform: scale(0);
  transition: all 0.4s ease;
}
.video_list .video_title {
  box-sizing: border-box;
  width: 380px;
  padding: 0 15px;
  font-size: 16px;
  color: #333;
  letter-spacing: 2px;
  margin-top: 15px;
}