* {
  padding: 0;
  margin: 0;
  list-style: none;
}

.video-space {
  width: 1200px;
  overflow: hidden;
  /* ¿ÉÈ¥³ý */
  margin: 20px auto;

}

/* ×ó±ß */
.major {
  float: left;
  padding-top: 30px;
  width: 180px;
  height: 570px;
  background-color: rgba(11, 108,184, 0.5);
  box-sizing: border-box;
  overflow: hidden;
}

.major li {
  width: 100%;
  padding: 8px;
  padding-top: 20px;
  cursor: pointer;
  /* margin-bottom: 20px; */
  /* background-color: pink; */
  box-sizing: border-box;
}
.major li:hover {
  background-color: rgba(255, 255, 255, 0.9);
  box-sizing: border-box;
}

/* .major li.active-bg {
  background-color: rgba(240, 240, 250, 0.5);
  box-sizing: border-box;
} */

.major h2 {
  margin-bottom: 10px;
  font-size: 20px;
  font-weight: 800;
  text-align: center;
  box-sizing: border-box;
}
.major .major-text {
  width: 185px;
  height: 0px;
  font-size: 13px;
  /* background-color: antiquewhite; */
  overflow-y: scroll;
  box-sizing: border-box;
}
.major .major-text span {
  display: inline-block;
  text-indent: 2em;
  padding: 10px;
  padding-top: 0;
  line-height: 1.8em;
  box-sizing: border-box;
}

/* ÓÒ±ß */
.video-popup {
  float: right;
  width: 1010px;
  height: 570px;
  background-color: lightblue;
  box-sizing: border-box;
}

.video-popup video {
  width: 100%;
  box-sizing: border-box;
}