.nav-content {
  position: fixed;
  width: 1200px;
  top: 0;
  z-index: 999;
}
.main .content-list {
  margin: 25px 0;
  padding: 25px;
  border: 1px solid #dddddd;
  background-color: #ffffff;
}
.main .content-list .introduce {
  border-bottom: 1px dashed #dddddd;
  padding-bottom: 25px;
}
.main .content-list .introduce h2 {
  color: #000000;
  font-size: 22px;
}
.main .content-list .introduce p.explain {
  color: #535353;
  line-height: 25px;
  text-indent: 25px;
  margin-top: 15px;
}
.main .content-list .list-content ul {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: justify;
  -webkit-justify-content: space-between;
  -ms-flex-pack: justify;
  justify-content: space-between;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-align-content: center;
  -ms-flex-line-pack: center;
  align-content: center;
  flex-wrap: wrap;
  width: 100%;
}
.main .content-list .list-content ul:after {
  content: "";
  width: 345px;
}
.main .content-list .list-content ul li {
  margin-top: 25px;
  width: 345px;
  padding-top: 25px;
}
.main .content-list .list-content ul li:nth-child(1),
.main .content-list .list-content ul li:nth-child(2),
.main .content-list .list-content ul li:nth-child(3) {
  border-top: none;
  padding-top: 0;
}
.main .content-list .list-content ul li .title {
  line-height: 40px;
  background-color: #358ff0;
  color: #ffffff;
  font-size: 18px;
  padding: 0 15px ;
}
.main .content-list .list-content ul li .text-all {
  padding: 15px ;
  border: 1px solid #dddddd;
  border-top: none;
}
.main .content-list .list-content ul li .text-all .pic img {
  width: 100%;
  height: 150px;
}
.main .content-list .list-content ul li .text-all .key {
  font-size: 14px;
  margin-bottom: 15px;
}
.main .content-list .list-content ul li .text-all .desc {
  color: #999999;
  height: 60px;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 3;
  overflow: hidden;
  margin: 15px 0;
}
.main .content-list .list-content ul li .text-all .download-all {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-align-content: center;
  -ms-flex-line-pack: center;
  align-content: center;
}
.main .content-list .list-content ul li .text-all .download-all a {
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: center;
  -webkit-justify-content: center;
  -ms-flex-pack: center;
  justify-content: center;
  -webkit-box-align: center;
  -webkit-align-items: center;
  -ms-flex-align: center;
  align-items: center;
  -webkit-align-content: center;
  -ms-flex-line-pack: center;
  align-content: center;
  width: 150px;
  line-height: 40px;
  background-image: linear-gradient(90deg, #98786a 0%, #7b918e 100%, #e6b400 100%, #1bbde6 100%);
  background-color: #358ff0;
  color: #ffffff;
  border-radius: 30px;
}
.main .content-list .list-content ul li .text-all .download-all a:first-of-type {
  background-image: linear-gradient(90deg, #4e74f0 0%, #00b7e6 33%, #00b7e6 66%, #00b7e6 100%);
}
.main .content-list .list-content ul li .text-all .download-all a:last-of-type {
  margin-left: 10px;
}
.main .content-list .list-content ul li .text-all .download-all a:hover {
  background-image: linear-gradient(90deg, #00b7e6 0%, #00b7e6 100%, #00b7e6 100%, #00b7e6 100%);
  background-color: #00b7e6;
}
.fixed {
  width: 1200px;
}