.list_topics_container .crumbs_box {
  width: 1200px;
  margin: 0 auto;
  margin-top: 15px;
  margin-bottom: 23px;
  font-size: 0;
}
.list_topics_container .crumbs_box .left {
  display: inline-block;
}
.list_topics_container .crumbs_box .left .icon_img {
  font-size: 16px;
  color: #FF6402;
  line-height: 19px;
}
.list_topics_container .crumbs_box .left .tetx {
  margin-left: 12px;
  font-size: 14px;
  color: #999999;
  line-height: 19px;
}
.list_topics_container .crumbs_box .right {
  display: inline-block;
}
.list_topics_container .crumbs_box .right a,
.list_topics_container .crumbs_box .right i {
  font-size: 14px;
  color: #999999;
  line-height: 19px;
}
.list_topics_container .crumbs_box .right a {
  margin: 0 8px 0 4px;
}
.list_topics_container .crumbs_box .right a:hover {
  text-decoration: underline;
}
@media (max-width: 750px) {
  .list_topics_container .crumbs_box {
    width: 100%;
    padding: 28px 0;
    margin: 0;
  }
  .list_topics_container .crumbs_box .left .icon_img {
    display: none;
  }
  .list_topics_container .crumbs_box .left .tetx {
    font-size: 24px;
    font-weight: 400;
    color: #999999;
    line-height: 40px;
  }
  .list_topics_container .crumbs_box .right a,
  .list_topics_container .crumbs_box .right i {
    font-size: 24px;
    font-weight: 400;
    color: #999999;
    line-height: 40px;
  }
  .list_topics_container .crumbs_box .right i {
    margin: 0 8px;
  }
}
.list_topics_container .main_box {
  box-sizing: border-box;
  width: 1200px;
  margin: 0 auto;
  padding: 20px 30px;
  margin-bottom: 30px;
  background: #FFFFFF;
  box-shadow: 0px 0px 11px 0px rgba(187, 187, 187, 0.5);
}
.list_topics_container .main_box .banner_box {
  margin: 0 auto;
  height: 200px;
  background: url(./list_topics_banner.png) no-repeat center;
  background-size: 100% 100%;
}
.list_topics_container .main_box .content_box {
  font-size: 0;
}
.list_topics_container .main_box .content_box .item_img_box {
  padding-top: 30px;
  display: inline-block;
  margin-right: 33px;
  width: 260px;
}
.list_topics_container .main_box .content_box .item_img_box:hover .item_tetx {
  color: #4078BE;
}
.list_topics_container .main_box .content_box .item_img_box:nth-child(4n+4) {
  margin-right: 0;
}
.list_topics_container .main_box .content_box .item_img_box .item_img {
  width: 100%;
  height: 172px;
}
.list_topics_container .main_box .content_box .item_img_box .item_img img {
  width: 100%;
  height: auto;
}
.list_topics_container .main_box .content_box .item_img_box .item_tetx {
  height: 60px;
  background: #F5F5F5;
  font-size: 18px;
  color: #333333;
  line-height: 60px;
  text-align: center;
  overflow: hidden;
  white-space: nowrap;
  text-overflow: ellipsis;
}
.list_topics_container .main_box .paging_box {
  margin-top: 20px;
  margin-top: 30;
  margin-bottom: 40px;
}
.list_topics_container .main_box .paging_boxs {
  display: none;
}
@media (max-width: 750px) {
  .list_topics_container .main_box {
    width: 100%;
    padding: 0;
    box-shadow: none;
    margin-bottom: 0;
  }
  .list_topics_container .main_box .banner_box {
    width: 100%;
    background: url(./list_topics_banner_ydd.png) no-repeat center;
    background-size: 100% 100%;
  }
  .list_topics_container .main_box .content_box {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 32px 44px;
    padding-bottom: 0;
  }
  .list_topics_container .main_box .content_box .item_img_box {
    padding: 0;
    margin: 0;
    margin-bottom: 20px;
    width: 320px;
  }
  .list_topics_container .main_box .content_box .item_img_box:nth-last-child(1),
  .list_topics_container .main_box .content_box .item_img_box:nth-last-child(2) {
    margin-bottom: 0;
  }
  .list_topics_container .main_box .content_box .item_img_box .item_img {
    width: 100%;
    height: 178px;
    overflow: hidden;
  }
  .list_topics_container .main_box .content_box .item_img_box .item_img img {
    width: 100%;
    height: auto;
  }
  .list_topics_container .main_box .content_box .item_img_box .item_tetx {
    width: 100%;
    height: 68px;
    background: #F5F5F5;
    font-size: 28px;
    font-weight: 400;
    color: #333333;
    line-height: 68px;
  }
  .list_topics_container .main_box .paging_box {
    display: none;
  }
  .list_topics_container .main_box .paging_box {
    display: block;
    margin: 40px 0;
  }
  .list_topics_container .main_box .paging_box .oPager .js_pageI {
    display: none !important;
  }
  .list_topics_container .main_box .paging_box .oPager .o_md-show {
    display: none !important;
  }
  .list_topics_container .main_box .paging_box .oPager .prev {
    width: 172px;
    height: 54px;
    background: #FFFFFF;
    border: 2px solid #DBDBDB;
    font-size: 28px;
    color: #333333;
    line-height: 38px;
    text-align: center;
    line-height: 48px;
  }
  .list_topics_container .main_box .paging_box .oPager .next {
    width: 172px;
    height: 54px;
    background: #FFFFFF;
    border: 2px solid #DBDBDB;
    font-size: 28px;
    color: #333333;
    line-height: 38px;
    text-align: center;
    line-height: 48px;
    margin-left: 24px;
  }
}
@media (min-width: 751px) {
  .pageold .list_topics_container .crumbs_box {
    width: 1200px;
    padding: 44.8px 0;
    margin: 0 auto;
  }
  .pageold .list_topics_container .crumbs_box .left .icon_img {
    display: none;
  }
  .pageold .list_topics_container .crumbs_box .left .tetx {
    font-size: 38.4px;
    font-weight: 400;
    color: #999999;
    line-height: 64px;
  }
  .pageold .list_topics_container .crumbs_box .right a,
  .pageold .list_topics_container .crumbs_box .right i {
    font-size: 38.4px;
    font-weight: 400;
    color: #999999;
    line-height: 64px;
  }
  .pageold .list_topics_container .crumbs_box .right i {
    margin: 0 12.8px;
  }
  .pageold .list_topics_container .main_box {
    width: 1200px;
    padding: 0;
    box-shadow: none;
    margin-bottom: 0;
    margin: 0 auto;
  }
  .pageold .list_topics_container .main_box .banner_box {
    width: 100%;
    background: url(./list_topics_banner_ydd.png) no-repeat center;
    background-size: 100% 100%;
  }
  .pageold .list_topics_container .main_box .content_box {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 51.2px 70.4px;
    padding-bottom: 0;
  }
  .pageold .list_topics_container .main_box .content_box .item_img_box {
    padding: 0;
    margin: 0;
    margin-bottom: 32px;
    width: 512px;
  }
  .pageold .list_topics_container .main_box .content_box .item_img_box:nth-last-child(1),
  .pageold .list_topics_container .main_box .content_box .item_img_box:nth-last-child(2) {
    margin-bottom: 0;
  }
  .pageold .list_topics_container .main_box .content_box .item_img_box .item_img {
    width: 100%;
    height: 284.8px;
    overflow: hidden;
  }
  .pageold .list_topics_container .main_box .content_box .item_img_box .item_img img {
    width: 100%;
    height: auto;
  }
  .pageold .list_topics_container .main_box .content_box .item_img_box .item_tetx {
    height: 108.8px;
    background: #F5F5F5;
    font-size: 44.8px;
    font-weight: 400;
    color: #333333;
    line-height: 108.8px;
    padding-left: 12.8px;
  }
  .pageold .list_topics_container .main_box .paging_box {
    display: none;
  }
  .pageold .list_topics_container .main_box .paging_box {
    display: block;
    margin: 64px 0;
  }
  .pageold .list_topics_container .main_box .paging_box .oPager .js_pageI {
    display: none !important;
  }
  .pageold .list_topics_container .main_box .paging_box .oPager .o_md-show {
    display: none !important;
  }
  .pageold .list_topics_container .main_box .paging_box .oPager .prev {
    width: 275.2px;
    height: 86.4px;
    background: #FFFFFF;
    border: 3.2px solid #DBDBDB;
    font-size: 44.8px;
    color: #333333;
    line-height: 60.8px;
    text-align: center;
    line-height: 76.8px;
  }
  .pageold .list_topics_container .main_box .paging_box .oPager .next {
    width: 275.2px;
    height: 86.4px;
    background: #FFFFFF;
    border: 3.2px solid #DBDBDB;
    font-size: 44.8px;
    color: #333333;
    line-height: 60.8px;
    text-align: center;
    line-height: 76.8px;
    margin-left: 38.4px;
  }
}