.navigation {
  height: 30px;
  line-height: 30px;
  color: #999;
  padding: 0 10px;
  font-size: 16px;
  background-color: #f8f8f8;
  text-align: left;
  margin: 14px auto 20px;
}

.left_tab_2 {
  margin: 30px 0;
}
.left_tab_conten .small_item {
  width: 320px;
}
.left_tab_conten .small_item .con_item {
  padding: 3px 0;
}
.con_item .r_img {
  width: 590px;
  margin-right: 10px;
}
.small_item img {
  width: 105px;
  height: 80px;
}
.left_tab_conten .small_item dt {
  white-space: normal;
  font-size: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box !important;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}
.left_tab_conten .small_item dl {
  min-height: 100px;
}
.list_r {
  overflow: hidden;
}
.list_r {
  position: sticky;
  top: 0;
}
.list_r .list_i_380 {
  width: 320px;
}
.list_r .list_i_380 .list_content .text {
  width: 200px;
}
/* 广告 */

.list_r .advertising img {
  vertical-align: top;
}
.list_r .advertising i {
  position: absolute;
  right: 10px;
  top: 10px;
  width: 20px;
  height: 20px;
  text-align: center;
  line-height: 20px;
  border-radius: 50%;
  background: rgba(0, 0, 0, 0.5);
  color: #000;
  cursor: pointer;
}
.list_r .advertising span {
  position: absolute;
  left: 10px;
  bottom: 10px;
  background-color: rgba(255, 255, 255, 0.6);
  border-radius: 20%;
  font-size: 14px;
}