.main {
  padding-top: 40px;
  padding-bottom: 60px;
}

.prolist-nav {
  margin-top: 45px;
  display: -webkit-flex;
  display: flex;
  -webkit-justify-content: center;
  justify-content: center;
  -webkit-flex-wrap: wrap;
  flex-wrap: wrap;
}

.prolist-nav li {
  font-size: 24px;
  color: #7c7c7c;
  font-weight: 300;
  text-align: center;
}

.prolist-nav li+li {
  margin-left: 90px;
}

.prolist-nav li a {
  color: #7c7c7c;
  font-size: clamp(15px,1.2vw, 22px);
}

.prolist-nav li.active a {
  color: var(--color-primary);
}

.videolist  ul {
  margin: 40px 0 0 -2%;
}

.videolist h2 {
  font-size: 48px;
  color: #000;
  line-height: 1;
  font-weight: 700;
  text-align: center;
}

.videolist ul li {
  float: left;
  width: 31.333333%;
  margin: 0px 0 25px 2%;
}

.videolist ul li .v {
  position: relative;
  width: 100%;
  display: block;
  overflow: hidden;
}

.videolist ul li .v img {
  width: 100%;
  display: block;
  transition: all 0.3s ease 0s;
  -webkit-transition: all 0.3s ease 0s;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.videolist ul li .v::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0, 0, 0, 0.2) url("../images/video.png") no-repeat center;
  display: block;
}

.videolist ul li .t {
  padding: 15px;
  background: #F3F4F7;
  box-sizing: border-box;
  position: relative;
}

.videolist ul li .t h5 {
  font-size: 16px;
  color: #333;
  text-align: center;
}

.videolist ul li:hover .v::after {
  background-color: rgba(0, 0, 0, 0.5);
}

.videolist ul li:hover img {
  transform: scale(1.11);
  -webkit-transform: scale(1.11);
}

@media screen and (max-width:768px) {
  .main {
    padding-top: 25px;
    padding-bottom: 30px;
  }

  .videolist ul li {
    width: 48%;
    margin: 0 0 15px 2%;
  }

  .videolist ul li .t {
    padding: 15px 10px;
  }

  .videolist ul li .t h5 {
    font-size: 15px;
  }
}


@media screen and (max-width:480px) {

  .videolist ul {
    margin: 0;
  }
  .videolist ul li {
    width: 100%;
    margin: 0 0 15px 0;
  }
   .videolist .prolist-nav {
    margin-top: 20px;
  }
  .videolist h2{
  font-size:24px;
  }
}

@media screen and (max-width:400px) {

  .videolist ul {
    margin: 0;
  }

  .videolist ul li {
    float: none;
    width: 100%;
    margin: 0 0 15px;
  }
}