.nav_container {
  width: 1200px;
  margin: 0 auto;
  padding: 10px;
  background: #fff;
  margin-bottom: 20px;
}
.navigation {
  margin-bottom: 10px;
}
.navigation a {
  font-size: 15px;
  color: rgb(51, 51, 51);
}
/* 左右布局 */
.nav_content {
  display: flex;
}
/* 左边 */
.nav_content_left {
  width: 225px;
  height: 100%;
  margin-right: 13px;
  border: 1px solid rgb(229, 229, 229);
}
.nav_content_left h2 {
  margin: 10px 5px 5px;
  width: 215px;
  height: 45px;
  overflow: hidden;
  font-size: 20px;
  border-bottom-color: #3399ff;
  border-bottom-width: 2px;
  border-bottom-style: solid;
  white-space: nowrap;
  display: flex;
  align-items: center;
}
.nav_content_pic {
  width: 68px;
  height: 46px;
  background-color: #3399ff;
}
.nav_content_left h2 a {
  flex: 1;
  text-align: center;
  color: #3399ff;
  font-size: 18px;
  font-weight: normal;
}
.nav_content_li,
.nav_content_li_change {
  background: rgb(245, 245, 245);
  margin: 0px;
  padding: 0px;
  height: 53px;
  line-height: 53px;
  text-align: center;
  text-decoration: none;
  border-top: 1px solid rgb(204, 204, 204);
}
.nav_content_li a {
  color: rgb(51, 51, 51);
  font-size: 16px;
  text-decoration: none;
}
.nav_content_li_change a {
  color: #3399ff;
  font-size: 16px;
  text-decoration: none;
}
/* 右边 */
.nav_content_right {
  flex: 1;
  border: 1px solid rgb(229, 229, 229);
  padding: 10px;
  margin-right: 20px;
  padding-bottom: 20px;
  position: relative;
  box-sizing: border-box;
}
/* 文章模板 */
.nav_content_right_article {
  padding-bottom: 60px;
}
/* 图片列表 */
.nav_content_right_imglist_news {
  padding: 0 10px;
  width: 100%;
  display: flex;
  margin-bottom: 10px;
  border-bottom: 1px dashed grey;
  box-sizing: border-box;
}
.nav_content_right_imglist_news_img {
  width: 150px;
  height: 110px;
}
.nav_content_right_imglist_news_img img {
  width: 150px;
  height: 100px;
}
.nav_content_right_imglist_news_content {
  width: 100%;
  margin-top: 6px;
  margin-left: 20px;
  display: flex;
  justify-content: space-between;
}
.nav_content_right_imglist_news_content_title {
  color: rgb(51, 51, 51);
  font-size: 16px;
  text-decoration: none;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.nav_content_right_imglist_news_content_time {
  color: rgb(102, 102, 102);
  font-size: 15px;
  margin-right: 10px;
}
/* 分页 */
.nav_content_right_imglist_page {
  width: 100%;
  display: flex;
  justify-content: center;
}
.nav_content_right_imglist_page_pager {
  display: flex;
  align-items: center;
}
.nav_content_right_imglist_page_pager a {
  font-size: 12px;
  margin: 0px 3px;
  padding: 4px 8px;
  border: 1px solid rgb(204, 204, 204);
  color: rgb(0, 0, 0);
  text-decoration: none;
  background-color: rgb(240, 240, 240);
}
.nav_content_right_imglist_page_pager a.nav_content_right_imglist_page_active {
  margin: 0px 3px;
  padding: 4px 8px;
  border: 1px solid rgb(255, 102, 0);
  color: rgb(255, 102, 0);
  text-decoration: none;
  background-color: rgb(255, 255, 255);
}
.nav_content_right_imglist_page_pager a:hover {
  color: rgb(255, 102, 0);
  text-decoration: none;
}
.nav_content_right_imglist_page_pager
  a.nav_content_right_imglist_page_active:hover {
  color: #ff6600;
  text-decoration: underline;
}
/* 文章列表 */
.nav_content_right_articlelist_li {
  margin: 6px 20px;
  list-style: disc;
}
.nav_content_right_articlelist_li:nth-child(5n) {
  padding-bottom: 20px;
  border-bottom: 1px dotted #666666;
}
.nav_content_right_articlelist_li_box {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav_content_right_articlelist_li a {
  font-size: 14px;
  color: #333333;
  text-decoration: none;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.nav_content_right_articlelist_li a:hover {
  color: #ff6600;
  text-decoration: underline;
}
.nav_content_right_articlelist_li span {
  font-size: 14px;
  color: #999999;
}
/* 图片模板 */
.nav_content_right_img {
  padding: 20px;
  display: flex;
  flex-wrap: wrap;
}
.nav_content_right_img_item {
  width: calc((100% - 80px) / 3);
  padding: 10px;
  margin-right: 40px;
  margin-bottom: 40px;
  border: 1px solid rgb(216, 216, 216);
  box-sizing: border-box;
}
.nav_content_right_img_item:nth-child(3n) {
  margin-right: 0;
}
.nav_content_right_img_item:hover p {
  color: #ff6600;
  text-decoration: underline;
}
.nav_content_right_img_item img {
  width: 100%;
  height: 138px;
}
.nav_content_right_img_item p {
  text-align: left;
  color: rgb(102, 102, 102);
  font-size: 14px;
  display: -webkit-box;
  overflow: hidden;
  -webkit-box-orient: vertical;
  -webkit-line-clamp: 2;
}