.sec-download{
  padding: 8.3% 0;
}
.sec-download .inner{
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-direction: row;
}
.sec-download .left-part{
  position: sticky;
  top: 15vh;
  width: 13.125em;
  text-align: center;
}
.sec-download .left-part a{
  color: var(--theme-blue);
  padding: 1.22em 0;
  transition: color 0.3s,background-color 0.3s;
  display: block;
  position: relative;
}
.sec-download .left-part a::after,.sec-download .left-part a:first-child::before{
  content: "";
  display: block;
  height: 1px;
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  background-color: var(--theme-blue);
  opacity: 0.2;
}
.sec-download .left-part a:first-child::before{
  bottom: auto;
  top: 0;
}
.sec-download .left-part a.active{
  color: #fff;
  background-color: var(--theme-blue);
}
.sec-download .right-part{
  width: 66.25em;
  position: relative;
  padding-top: 0.3125em;
}
.sec-download .right-part.noline{
  padding-top: 0;
}
.sec-download .right-part::before,.sec-download .right-part::after{
  content: "";
  height: 0.3125em;
  display: block;
  position: absolute;
  left: 0;
  top: 0;
}
.sec-download .right-part.noline::before,.sec-download .right-part.noline::after{
  display: none;
}
.sec-download .right-part::before{
  width: 100%;
  background-color: var(--theme-blue);
}
.sec-download .right-part::after{
  width: 26.415%;
  background-color: var(--theme-red);
}
.sec-download .list-box{
  width: 100%;
  margin-bottom: 3.125em;
}
.sec-download .list-box th,.sec-download .list-box td{
  border-bottom: 1px solid #e7e7e7;
  height: 3.75em;
}
.sec-download .list-box th{
  background-color: #f2f6f9;
  font-weight: normal;
}
.sec-download .list-box th:first-child,.sec-download .list-box td:first-child{
  padding: 0 4em;
  text-align: left;
}
.sec-download .list-box th:last-child,.sec-download .list-box td:last-child{
  padding: 0 3.125em;
  text-align: center;
}
.sec-download .list-box p{
  max-height: 1em;
}
.sec-download .list-box .download{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 7.14em;
  height: 2.572em;
  border: 1px solid #d4d4d4;
  border-radius: 1.286em;
  background-color: #fafafa;
  color: #666;
  font-size: 0.875em;
  transition: background-color 0.3s,color 0.3s;
}
/*视频下载*/
.sec-download .list-box.video{
  display: flex;
  align-items: stretch;
  justify-content: space-between;
  flex-direction: row;
  flex-wrap: wrap;
  margin-bottom: 0;
}
.sec-download .list-box.video::after{
  display: block;
  content: "";
  width: 30%;
}
.sec-download .list-box.video li{
  width: 30%;
  margin-bottom: 5.625em;
}
.sec-download .list-box .video-box{
  position: relative;
  margin-bottom: 1em;
}
.sec-download .list-box .video-box .video-btn{
  cursor: pointer;
  background-color: rgba(0,0,0,0.3);
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.375em;
  color: #fff;
  transition: color 0.3s;
}
.sec-download .list-box .text-box h5{
  font-weight: normal;
  line-height: 1.625em;
  max-height: 3.25em;
}
@media only screen and (min-width:1024px){
  .sec-download .left-part a:hover{
    color: #fff;
    background-color: var(--theme-blue);
  }
  .sec-download .list-box .download:hover{
    background-color: var(--theme-red);
    border-color: var(--theme-red);
    color: #fff;
  }
  .sec-download .list-box .video-box .video-btn:hover{
    color: var(--theme-red);
  }
}

@media only screen and (max-width:1024px){
  .sec-download{
    padding: 15% 0;
  }
  .sec-download .inner{
    display: block;
  }
  .sec-download .left-part{
    top: 4.5em;
    width: 100%;
    z-index: 1;
    background-color: #fff;
    display: flex;
    align-items: stretch;
    justify-content: flex-start;
    flex-direction: row;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    margin-bottom: 10%;
  }
  .sec-download .left-part a{
    width: 33.333%;
    padding: 1em 0;
  }
  .sec-download .left-part a::after,.sec-download .left-part a:first-child::before{
    height: 1em;
    left: 100%;
    width: 1px;
    top: 50%;
    margin-top: -0.5em;
  }
  .sec-download .left-part a:first-child::before{
    left: 0;
  }
  .sec-download .left-part a.active{
    color: #fff;
    background-color: var(--theme-blue);
  }
  .sec-download .right-part{
    width: 100%;
  }
  .sec-download .list-box{
    margin-bottom: 10%;
  }
  .sec-download .list-box th:first-child,.sec-download .list-box td:first-child{
    padding: 0 1em;
  }
  .sec-download .list-box th:last-child,.sec-download .list-box td:last-child{
    padding: 0 1em;
  }
  .sec-download .list-box .download{
    font-size: 0.75em;
  }
  /*视频下载*/
  .sec-download .list-box.video{
    display: block;
  }
  .sec-download .list-box.video::after{
    display: none;
  }
  .sec-download .list-box.video li{
    width: 100%;
    margin-bottom: 10%;
  }
}