.center {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}

.center .left {
  width: 286px;
  margin-right: 10px;
  background: #fff;
}

.center .left .one .title {
  display: flex;
  justify-content: space-between;
  cursor: pointer;
  padding: 15px 16px;
  align-items: center;
}

.center .left .one .title>img {
  width: 15px;
  height: 15px;
  object-fit: contain;
}

.center .left .one .title span {
  flex: 1;
  margin: 0 12px;
  color: #333333;
  font-size: 16px;
  font-weight: 500;
}


.center .left .one .title>.arrow {
  width: 16px;
  height: 16px;
}

.center .left .one.active .title>.arrow {
  transform: rotate(180deg);
}
.center .left .one .twoList {
  display: none;
}
.center .left .one.active .twoList {
  display: block;
}
.center .left .one .twoList a {
  display: block;
  width: 100%;
  line-height: 20px;
  /* font-weight: 500; */
  font-size: 14px;
  color: #666666;
  padding: 14px 20px 14px 45px;
  box-sizing: border-box;
}

.center .left .one .twoList a.active {
  background: var(--main-color);
  color: #fff;
}

.center .right {
  flex: 1;
  background-color: #fff;
}

.center .right .title {
  border-bottom: 1px solid #DEDEDE;
  padding: 15px 30px;
  color: #333333;
  font-size: 20px;
  line-height: 30px;
  font-weight: 500;
}

.center .right .content {
  color: #333333;
  font-size: 16px;
  padding: 24px 30px;
}

.center .right .content img,
.center .right .content video {
  width: auto;
  height: auto;
  max-width: 100%;
}