.about-menu {
  padding: 30px 0;
  text-align: center;
  border-bottom: 1px solid #e3e3e3;
  background: #fff;
}

.about-menu ul {
  font-size: 0;
}

.about-menu ul li {
  height: 46px;
  line-height: 46px;
  display: inline-block;
  margin: 0 10px;
  width: 23%;
  margin-top: 5px;
}

.about-menu ul li a {
  font-size: 18px;
  color: #333;
  display: block;
  /*padding: 0 48px;*/
  background: #eaeaea;
  line-height: 46px;
  border-radius: var(--button-radius);
}

.about-menu ul li.active a {
  background: var(--color-primary);
  color: #fff;
}
@media screen and (max-width: 1499px) {
  /*视频分类*/
  .about-menu .container li {
    width: 33.33%;
  }
}
@media screen and (max-width: 1199px) {
  /*视频分类*/
  .about-menu .container li {
    width: 50%;
  }
  .about-menu .container li a {
    font-size: 14px;
  }
}
@media screen and (max-width: 768px) {
  .about-menu {
    padding: 20px 0 15px;
  }

  .about-menu ul li {
    height: 36px;
    line-height: 36px;
    margin: 0 5px 5px;
  }

  .about-menu ul li a {
    font-size: 14px;
    padding: 0 30px;
  }
  
  /*视频分类*/
  .about-menu .container li {
    width: auto;
    width: 100%;
    padding: 0 5px;
    margin: 7px 0;
  }
  .about-menu .container li a {
    font-size: 14px;
  }
}