div.extend_container {
  display: inline-block;
  position: relative;
}

div.extend_container input {
  display: block;
}

div.extend_container div.extend_list {
  position: absolute;
  top: calc(100% - 1px);
  z-index: 999;
  margin-right: 15px;
  width: 100%;
}

div.extend_container div.extend_list ul {
  background-color: #fff;
  border: 1px solid #ddd;
  border-top: 1px solid #f0f0f0;
  border-radius: 4px;
  margin: 0;
  padding: 0;
  list-style: none;
}

div.extend_container div.extend_list ul li {
  padding: 5px;
  margin: 0;
}

div.extend_container div.extend_list ul li:hover {
  cursor: pointer;
  background-color: #eee;
}

div.extend_container div.extend_list ul li.active {
  background-color: #eee;
}

@media screen and (max-width: 999px) {
  container {
    padding: 0 10px;
  }
}

ul,
ol {
  margin: 0;
}

h1.article_title {
  color: #3963c5;
  font-size: 26px;
  text-align: center;
}

summary {
  display: block;
  text-align: center;
  margin: 0 0 40px 0;
  font-family: FangSong;
  font-size: 16px;
}

summary span {
  color: #878787;
  margin-right: 15px;
}

.article_content {
  font-family: Times New Roman,fangsong;
  line-height: 1.6em;
  font-size: 16px;
  word-break: break-all;
}
.article_content p {
  word-break: break-all;
}

ul.articlelist {
  margin-top: 20px;
  padding: 0;
  list-style: none;
}

ul.articlelist li {
  margin-bottom: 15px;
  padding-bottom: 5px;
  border-bottom: 0.1px dotted #c0c0c0;
}

ul.articlelist li a {
  font-size: 18px;
}

ul.articlelist li p {
  font-size: 14px;
}

ul.articlelist li p.info_time {
  color: #878787;
}

ul.articlelist li.video {
  display: flex;
  flex-flow: row nowrap;
}

ul.articlelist li.video iframe {
  width: 230px;
  height: 140px;
  margin-right: 20px;
}

li {
  font-size: 14px;
}

.channelholder {
  display: flex;
  flex-flow: row nowrap;
  margin: 30px 0;
}

.channelholder img {
  width: 270px;
  height: 180px;
  margin-right: 20px;
  flex: 0 0 270px;
}

.channelholder .channelinfo {
  flex: 1 1 510px;
}

.channelholder .channelinfo .rss a {
  margin-right: 20px;
}

.channelholder .channelinfo .rss a:last-child {
  margin-right: 0;
}

div.legend h2 {
  display: inline-block;
  padding: 0;
  margin: 15px 0;
  background: url("../images/text-box.png") no-repeat;
  color: #fff;
  height: 30px;
  line-height: 30px;
}

div.legend h2::before {
  content: "";
  display: inline-block;
  width: 32px;
  padding-right: 20px;
  text-align: right;
  color: #fff;
}

div.legend h2::after {
  content: "";
  background-color: #fff;
  width: 20px;
  height: 40px;
  float: right;
  position: relative;
  top: 0;
  left: 10px;
  transform: rotate(20deg);
}

div.legend div.searcher {
  height: 30px;
  border: 1px solid #c0c0c0;
  border-radius: 15px;
  float: right;
  margin: 15px 0;
}

div.legend div.searcher input {
  width: 200px;
  height: 30px;
  background-color: rgba(255, 255, 255, 0.2);
  border: 0;
  outline: rgba(255, 255, 255, 0.2);
  border-radius: 15px 0px 0px 15px;
  padding: 0px 20px;
  border-right: 0;
  margin: 0;
  font-size: 14px;
  vertical-align: middle;
}

div.legend div.searcher a {
  display: inline-block;
  margin: 0;
  margin-right: 10px;
  background-color: rgba(255, 255, 255, 0.2);
  height: 30px;
  width: 32px;
  border-radius: 0px 15px 15px 0px;
  vertical-align: middle;
  line-height: 30px;
  font-size: 15px;
  text-align: center;
}

div.legend div.searcher a i {
  margin-right: 10px;
}

div.legend div.searcher::after {
  content: "";
  clear: both;
}

pager a {
  margin-right: 20px;
}

waterfall {
  display: block;
  column-count: 3;
  column-gap: 50px;
  -moz-column-count: 3;
  /* Firefox */
  -webkit-column-count: 3;
  /* Safari and Chrome */
}

waterfall channel {
  display: block;
  width: 300px;
  text-align: left;
  -webkit-column-break-inside: avoid;
  page-break-inside: avoid;
  break-inside: avoid;
}

@media screen and (max-width: 960px) {
  waterfall {
    column-count: 1;
    text-align: center;
  }
}

waterfall channel div {
  display: block;
  min-height: 50px;
  position: relative;
}

waterfall channel img {
  width: 100%;
  min-height: 150px;
  object-fit: cover;
  margin: 0px;
  padding: 0px;
}

waterfall channel h3 {
  display: block;
  position: absolute;
  bottom: 0;
  width: 100%;
  color: white;
  background-color: rgba(0, 0, 0, 0.4);
  text-align: right;
  padding-right: 10px;
  font-size: 18px;
}

waterfall ul {
  padding: 0px 20px;
}

waterfall li {
  font-size: 14px;
  padding: 5px 0px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

channel {
  display: block;
  width: 300px;
  margin-bottom: 10px;
}

.loginmask {
  background: rgba(255, 255, 255, 0.9);
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  left: 0;
  top: -90px;
  z-index: 999;
}

p {
  white-space: normal;
}

topic {
  display: block;
  border: solid 1px gainsboro;
  margin: 20px 0;
}

topic h2 {
  width: 100%;
  display: inline-block;
  position: relative;
  padding: 15px 12px;
  border-bottom: solid 1px gainsboro;
}

topic h2 span {
  font-size: 12px;
  color: #878787;
}

topic h4 {
  text-align: left;
  font-weight: bold;
  margin: 15px 0;
}

topic .desc {
  color: #878787;
}

topic .book_container {
  padding: 0px 15px;
  display: flex;
  align-items: center;
}

topic .book_container img.arr {
  height: 100%;
  cursor: pointer;
}

topic .book_container img.arr:hover {
  content: url(../images/arr_choosed.png);
}

topic .book_container img.right_arr {
  transform: rotateY(180deg);
}

topic .book_container booklist {
  padding: 20px;
  display: flex;
  flex-flow: row wrap;
}

topic .book_container booklist book {
  display: flex;
  flex-flow: row nowrap;
  margin-bottom: 20px;
  flex: 0 0 33.33%;
  height: 160px;
  overflow: hidden;
}

topic .book_container booklist book img {
  width: 120px;
  margin-right: 10px;
  box-shadow: 1px 1px 6px #c6c6c6;
}

topic .book_container booklist book .bookinfo {
  width: calc(100% - 130px);
  min-width: 0;
  text-align: left;
  padding: 15px 10px;
}

topic .book_container booklist book .bookinfo a {
  display: inline-block;
  width: 100%;
  text-overflow: ellipsis;
  overflow: hidden;
  white-space: nowrap;
  font-size: 18px;
  padding-bottom: 10px;
  border-bottom: solid 1px #eee;
}

topic .book_container booklist book .bookinfo p {
  margin-top: 10px;
  overflow: hidden;
  height: 6.4em;
}

topic liblist {
  padding: 0 15px 15px 15px;
  display: flex;
  justify-content: space-between;
}

topic liblist lib {
  margin: 15px 0 20px 0;
  border-radius: 4px;
  padding: 0 15px;
  border: solid 1px #eee;
  display: flex;
  flex-flow: column wrap;
  width: 450px;
}

topic liblist lib .title {
  padding: 10px 0;
  font-size: 18px;
  font-weight: bold;
  border-bottom: solid 1px #eee;
}

topic liblist lib .info {
  padding: 10px 0px;
  display: flex;
  justify-content: space-between;
  border-bottom: 1px dashed gainsboro;
}

topic liblist lib .info img {
  width: 40%;
  margin-right: 15px;
}

topic liblist lib .info p {
  margin: 0;
  width: calc(60% - 10px);
  height: 8em;
  overflow: hidden;
}

topic liblist lib .cata ul {
  padding: 5px 0;
  list-style: none;
}

topic liblist lib .cata ul img {
  vertical-align: top;
  margin-top: 5px;
  margin-right: 10px;
}

topic liblist lib .cata ul a {
  display: inline-block;
  width: 300px;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}

topic liblist lib .libtip {
  width: 230px;
  margin: 10px 0;
  padding: 5px 12px;
  border: solid 1px #79adfc;
  position: relative;
  clear: both;
  line-height: 17px;
}

topic liblist lib .libtip img {
  float: right;
}

topic liblist lib .libtip::before, topic liblist lib .libtip::after {
  content: "";
  position: absolute;
  height: 22px;
  width: 5px;
  background-color: #79adfc;
}

topic liblist lib .libtip::before {
  left: -5px;
}

topic liblist lib .libtip::after {
  right: -5px;
}

topic videolist {
  display: flex;
  flex-flow: row wrap;
  margin: 15px 0;
  padding: 0 15px;
}

topic videolist dd {
  text-align: left;
  width: 285px;
  margin: 0 25px 40px 0;
}

topic videolist dd iframe,
topic videolist dd img {
  cursor: pointer;
  width: 100%;
  height: 165px;
  border-radius: 4px;
}

topic videolist dd .video_title {
  font-size: 16px;
}

topic classlist {
  display: flex;
  flex-flow: row wrap;
  margin: 15px 0;
  padding: 0 15px;
}

topic classlist a.title_class {
  display: inline-block;
  width: 100%;
  font-size: 18px;
  padding-bottom: 10px;
  border-bottom: solid 1px #eee;
  font-weight: bold;
}

topic classlist videolist {
  display: flex;
  flex-flow: row wrap;
  padding: 0;
  margin-top: 15px;
}

topic classlist videolist dd {
  text-align: left;
  width: 285px;
  margin: 0 25px 40px 0;
}

topic classlist videolist dd iframe,
topic classlist videolist dd img {
  cursor: pointer;
  width: 100%;
  height: 165px;
  border-radius: 4px;
}

topic classlist videolist dd .video_title {
  font-size: 16px;
}

div.main_container {
  display: flex;
}

div.main_container div.side_directory {
  flex: 0 0 200px;
  margin-top: 30px;
}

div.main_container div.side_directory ul {
  list-style: none;
  padding: 0;
}

div.main_container div.side_directory ul li {
  font-size: 16px;
  padding: 8px 0 8px 5px;
  background-color: #eee;
  border-radius: 2px;
  cursor: pointer;
}

div.main_container div.side_directory ul li i {
  font-size: 14px;
  color: #79adfc;
}

div.main_container div.side_directory ul li.active {
  background-color: #79adfc;
  color: #fafafa;
}

div.main_container div.side_directory ul li.active i {
  font-size: 14px;
  color: #fafafa;
}

div.main_container div.side_directory ul li:hover {
  background-color: #79adfc;
  color: #fafafa;
}

div.main_container div.side_directory ul li:hover i {
  font-size: 14px;
  color: #fafafa;
}

div.main_container div.catalog_container {
  flex: 1 1 auto;
  margin-right: 15px;
}

div.view_container {
  margin: 30px 0;
  display: flex;
  border: solid 1px gainsboro;
  flex-flow: row wrap;
}

div.view_container a.title {
  flex: 0 0 100%;
  font-size: 18px;
  font-weight: bold;
  padding: 10px 15px;
  border-bottom: solid 1px gainsboro;
}

div.view_container div.frame_box {
  min-height: 400px;
  flex: 0 0 calc(100% - 300px);
  padding: 0;
  border-right: solid 1px #eee;
  display: flex;
  flex-flow: column nowrap;
}

div.view_container div.frame_box div.video_player {
  width: 100%;
  padding: 25px 15px;
  margin-bottom: 10px;
  display: flex;
  justify-content: center;
  border-bottom: solid 1px #eee;
}

div.view_container div.frame_box div.video_player iframe {
  width: 650px;
  height: 430px;
}

div.view_container div.frame_box div.video_info {
  width: 100%;
  padding: 0 15px;
  margin-bottom: 20px;
}

div.view_container div.frame_box div.video_info p {
  padding: 0;
  margin: 0;
}

div.view_container div.frame_box div.video_info .title {
  width: 100%;
  font-size: 16px;
  margin-bottom: 5px;
  font-weight: bold;
}

div.view_container div.frame_box div.video_info div {
  width: 100%;
  margin-bottom: 5px;
  font-weight: bold;
}

div.view_container div.frame_box div.video_info div .author {
  margin-right: 30px;
  display: inline-block;
}

div.view_container div.frame_box div.video_info div .createtime {
  display: inline-block;
}

div.view_container ul {
  flex: 0 0 300px;
  list-style: none;
  padding: 0 10px;
}

div.view_container ul li {
  display: flex;
  margin: 15px 0;
  height: 60px;
  position: relative;
}

div.view_container ul li iframe {
  width: 90px;
  margin-right: 5px;
}

div.view_container ul li span {
  display: inline-block;
  flex: 0 0 calc(100% - 95px);
  line-height: 20px;
  overflow: hidden;
  height: 60px;
}

div.view_container ul li::after {
  content: "";
  width: 100%;
  height: 100%;
  position: absolute;
  cursor: pointer;
}

div.view_container ul li:hover {
  background-color: #eee;
}

div.view_container ul li.active {
  background-color: #eee;
}