.ctn2 {
  position: relative;
  overflow: hidden;
}
.ctn2 ul {
  border-top: 1px solid #1e2432;
}
.ctn2 ul li {
  color: #fff;
  border-bottom: 1px solid #1e2432;
  position: relative;
  overflow: hidden;
  margin-bottom:10px;
}
.ctn2 ul li:before {
  content: '';
  width: 100%;
  height: 100%;
  background-color: #20242c;
  background-image: url(/static/cn/img/technology/faq/bg1.jpg);
  background-repeat: no-repeat;
  background-size: contain;
  background-position: right bottom;
  position: absolute;
  right: 0;
  bottom: 0;
  z-index: 1;
  opacity: 0;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 ul li .top {
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 40px;
  cursor: pointer;
  position: relative;
  z-index: 2;
}
.ctn2 ul li .top h2 {
  width: 90%;
  position: relative;
  padding-left: 34px;
}
.ctn2 ul li .top h2:before {
  content: '';
  width: 14px;
  height: 14px;
  background: rgba(255, 255, 255, 0.2);
  position: absolute;
  left: 0;
  top: 6px;
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 ul li .top span {
  display: block;
  font-size: 20px;
  color: rgba(255, 255, 255, 0.5);
  transition: all 0.5s;
  -webkit-transition: all 0.5s;
  -moz-transition: all 0.5s;
  -ms-transition: all 0.5s;
}
.ctn2 ul li .bottom {
  display: none;
  padding: 0 13% 60px 74px;
  position: relative;
  z-index: 3;
}
.ctn2 ul li .bottom p {
  margin-top: 20px;
}
.ctn2 ul li .bottom img {
  max-width: 100%;
}
.ctn2 ul li:hover .top h2:before {
  background: var(--color);
}
.ctn2 ul li:hover .top span {
  color: #fff;
}
.ctn2 ul li.active:before {
  opacity: 1;
}
.ctn2 ul li.active .top h2:before {
  background: var(--color);
}
.ctn2 ul li.active .top span {
  transform: rotate(180deg);
  -webkit-transform: rotate(180deg);
  -moz-transform: rotate(180deg);
  -ms-transform: rotate(180deg);
  color: #fff;
}
@media screen and (max-width: 1440px) {
  .ctn2 ul li .top {
    height: 80px;
    padding: 0 30px;
  }
  .ctn2 ul li .top h2 {
    padding-left: 26px;
  }
  .ctn2 ul li .top h2:before {
    width: 12px;
    height: 12px;
    top: 7px;
  }
  .ctn2 ul li .bottom {
    padding: 0 10% 40px 56px;
  }
  .ctn2 ul li .bottom p {
    margin-top: 14px;
  }
}
@media screen and (max-width: 768px) {
  .ctn2 ul li .top {
    padding: 0 14px;
  }
  .ctn2 ul li .top h2 {
    padding-left: 20px;
  }
  .ctn2 ul li .top h2:before {
    width: 10px;
    height: 10px;
    top: 8px;
  }
  .ctn2 ul li .top span {
    font-size: 18px;
  }
  .ctn2 ul li .bottom {
    padding: 0 20px 30px 34px;
  }
  .ctn2 ul li .bottom p {
    margin-top: 10px;
  }
}