.nav-content {
  position: fixed;
  top: 20px;
  z-index: 999;
  border: 1px solid #dddddd;
}
.main .content-list {
  margin: 25px 0;
  position: relative;
}
.main .content-list .column-h2 {
  margin-bottom: 25px;
}
.main .content-list .column-h2 h2 {
  font-size: 30px;
  font-weight: bold;
  color: #000000;
  text-align: center;
}
.main .content-list .column-h2 .tip {
  line-height: 25px;
  color: #666666;
  font-size: 16px;
  font-weight: bold;
  margin: 15px 0;
  text-align: center;
}
.main .content-list .tab-nav {
  position: absolute;
  left: -140px;
  top: 0;
  width: 120px;
  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;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  border: 1px solid #dddddd;
  border-radius: 5px;
  overflow: hidden;
  background-color: #eeeeee;
}
.main .content-list .tab-nav a {
  width: 90px;
  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;
  font-size: 16px;
  color: #535353;
  text-align: center;
  padding: 10px 15px;
  transition: 0.5s;
}
.main .content-list .tab-nav a.active,
.main .content-list .tab-nav a:hover {
  background-color: #358ff0;
  color: #ffffff;
}
.main .content-list .plate {
  background-color: #ffffff;
  border: 1px solid #dddddd;
  margin: 25px 0;
  transition: 0.5s;
}
.main .content-list .plate .column-title {
  width: 100%;
}
.main .content-list .plate .column-title h2 {
  background-color: #eeeeee;
  border-bottom: 1px solid #dddddd;
  margin-bottom: 0;
}
.main .content-list .plate ul {
  width: 100%;
  height: 100%;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: start;
  -webkit-justify-content: flex-start;
  -ms-flex-pack: start;
  justify-content: flex-start;
  flex-wrap: wrap;
  border-top: none;
  border-bottom: 1px solid #dddddd;
}
.main .content-list .plate ul:last-of-type {
  border-bottom: none;
}
.main .content-list .plate ul li {
  transition: 0.5s;
  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;
  flex: 1;
  border-right: 1px solid #dddddd;
  padding: 25px 10px;
  overflow: hidden;
  height: 120px;
}
.main .content-list .plate ul li:hover {
  box-shadow: 0 5px 10px #cbcbcb;
}
.main .content-list .plate ul li:hover span.btn {
  top: 95px;
}
.main .content-list .plate ul li:hover .introduction-recommend {
  transition: 0.5s;
  top: -105px;
}
.main .content-list .plate ul li:last-of-type {
  border-right: none;
}
.main .content-list .plate ul li a {
  position: relative;
  display: -webkit-box;
  display: -webkit-flex;
  display: -ms-flexbox;
  display: flex;
  -webkit-box-pack: 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;
  -webkit-box-orient: vertical;
  -webkit-box-direction: normal;
  -webkit-flex-direction: column;
  -ms-flex-direction: column;
  flex-direction: column;
  max-width: 178px;
  width: 100%;
  height: 100%;
}
.main .content-list .plate ul li a span.btn {
  transition: 0.5s;
  position: absolute;
  top: -75px;
  left: 28%;
  width: 80px;
  height: 30px;
  line-height: 30px;
  text-align: center;
  background-color: #358ff0;
  color: #ffffff;
  font-size: 12px;
  border-radius: 5px;
}
.main .content-list .plate ul li a span.btn:hover {
  background-color: #1b76d8;
}
.main .content-list .plate ul li a img {
  width: 60px;
  height: 60px;
}
.main .content-list .plate ul li a p {
  transition: 0.5s;
  width: 100%;
  margin: 5px 0;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
  text-align: center;
}
.main .content-list .plate ul li a .title-recommend {
  color: #000000;
  font-size: 18px;
  font-weight: bold;
}
.main .content-list .plate ul li a .introduction-recommend {
  position: absolute;
  top: 95px;
  left: 0;
  font-size: 14px;
  color: #666666;
}