@charset "utf-8";
.tabs {
  width: 100%;
  background-color: #f1f1f1;
}

.tab {
  width: 100%;
  height: 61px;
  display: flex;
  justify-content: flex-start;
  align-items: center;
}

.tab a {
  color: #666666;
  font-size: 16px;
  line-height: 61px;
  margin-right: 50px;
}

.tab a.active {
  color: #3e63fd;
  font-weight: bold;
}

.banner {
  width: 100%;
  height: 200px;
  position: relative;
}

.banner p {
  width: 100%;
  text-align: center;
  font-size: 30px;
  color: #FFFFFF;
  position: absolute;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  display: flex;
  justify-content: center;
  align-items: center;
}

.banner img {
  width: 100%;
  height: 100%;
}

.video-title {
  width: 100%;
  height: 50px;
  border-bottom: 1px solid #f0f0f0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 30px;
}

.video-title b {
  font-size: 20px;
  color: #333333;
  padding-left: 15px;
  position: relative;
}

.video-title b:before {
  content: '';
  width: 4px;
  height: 23px;
  background-color: #3e63fd;
  position: absolute;
  left: 0;
  top: 2px;
}

.video-title a {
  width: 85px;
  height: 30px;
  border-radius: 15px;
  border: solid 1px #d0d0d0;
  font-size: 12px;
  letter-spacing: 1px;
  color: #3e63fd;
  text-align: center;
  line-height: 28px;
}

.video-list {
  width: 100%;
  display: flex;
  justify-content: flex-start;
  flex-wrap: wrap;
  padding-top: 30px;
}

.video-item {
  display: block;
  width: 285px;
  margin-right: 20px;
  margin-bottom: 30px;
}

.video-item:nth-child(4n) {
  margin-right: 0;
}

.video-img {
  width: 100%;
  height: 163px;
}

.video-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.video-item h3 {
  width: 100%;
  font-size: 16px;
  letter-spacing: 1px;
  color: #333333;
  font-weight: bold;
  margin: 10px 0;
}

.video-item p {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  font-size: 12px;
  letter-spacing: 1px;
  color: #666666;
}

.video-item p img {
  margin-right: 5px;
}

.mask_1 {
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  right: 0;
  background: rgba(0, 0, 0, .6);
  display: none;
}

.mask-content {
  width: 1100px;
  height: 700px;
  background-color: #ffffff;
  padding: 20px 30px;
  position: absolute;
  top: 50%;
  left: 50%;
  margin-left: -550px;
  margin-top: -350px;
  display: flex;
  justify-content: flex-start;
  flex-direction: column;
}

.mask-content h3 {
  width: 100%;
  font-size: 16px;
  letter-spacing: 1px;
  color: #333333;
  font-weight: bold;
}

.mask-content p {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  font-size: 12px;
  letter-spacing: 1px;
  color: #666666;
  padding-top: 10px;
}

.mask-content p img {
  margin-right: 5px;
}

.mask-video {
  width: 100%;
  flex: 1;
  padding-top: 10px;
}

.mask-video video {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.close {
  position: absolute;
  top: 10px;
  right: 10px;
  cursor: pointer;
}