.content_and_article {
  position: relative;
  display: flex;
  max-width: 1280px;
  margin: 0 auto;
  justify-content: center;
}

.all_articles {
  display: none;
}

.article {
  max-width: 375px;
  width: 100%;
  background-color: #fff;
}

.article_list {
  padding: 24px 8px;
}

.article_list .article_item {
  display: flex;
  justify-content: space-between;
  padding: 8px 16px;
  border-radius: 8px;
}

.article_list .article_item:hover {
  background-color: rgb(216, 234, 251);
}

.article_list .article_item .arrow {
  display: flex;
  align-items: center;
  width: 6px;
}

.article_list .article_item .arrow img {
  width: 100%;
}

.article_list a {
  text-decoration: none;
  color: #060606;
}

.article_list li {
  list-style: none;
}

.main {
  font-size: 17px;
  max-width: 680px;
  padding: 24px;
  background-color: #fff;
  border: 1px solid rgba(0, 0, 0, 0.1);
  line-height: 1.6;
}

.title_collapse {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.title_collapse .collapse {
  cursor: pointer;
  color: #1890ff;
  display: inline-block;
  margin-left: 20px;
  padding: 4px 12px;
  background: #f5f5f5;
  border-radius: 4px;
}

.collapse:hover {
  background: #eaeaea;
}

.red {
  color: rgb(217, 33, 66);
}

.main a {
  text-decoration: none;
  color: #1890ff;
  white-space: normal;
  word-wrap: break-word;
}

.main a:hover {
  color: #40a9ff;
}

.main h2 {
  font-size: 22px;
  background-color: #e6e6e6;
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 600;
}

.main h2 img {
  width: 12px;
  vertical-align: middle;
  padding: 8px;
  margin: 0;
  transition: transform 0.3s ease;
  /* 添加过渡效果 */
}

.fold_area {
  padding-bottom: 16px;
}

.main img {
  width: 100%;
  margin: 8px 0;
}

.main ul {
  padding: 0 16px;
}

.main ol {
  padding: 0 16px 0 26px;
}

.main li {
  padding: 0 0 8px 0;
}

.main li p {
  margin: 8px 0;
}

.main .li_disc li {
  list-style: disc;
  margin-left: 10px;
}

.main .notice {
  background-color: #fff8ba;
  padding: 0 8px;
  border-radius: 4px;
  color: #5b3e0e;
}

.img_border {
  border: 1px solid #e6e6e6;
}

.cover {
  display: none;
}

.article .description {
  display: none;
}

.nav .logo img {
  display: block;
  height: 37px;
  object-fit: contain;
  object-position: left center;
}

@media screen and (min-width: 501px) {
  .nav {
    min-height: 55px;
  }
}

@media screen and (max-width: 500px) {
  .nav .logo img {
    height: 27px;
    object-position: center;
  }

  .content_and_article {
    display: flex;
    flex-direction: column;
    width: 100%;
  }
  .article {
    position: fixed;
    max-width: 500px;
    width: 100%;
    bottom: 0;
    z-index: 10;
    border-top: 1px solid #e3e3e3;
  }
  .article_list {
    display: none;
  }
  .article_list .article_item {
    padding: 12px 16px;
  }
  .all_articles {
    /* display: block; */
    padding: 16px 0 32px 16px;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    border-top: 1px solid #e3e3e3;
    background-color: #efefef;
    cursor: pointer;
  }
  .main {
    padding: 16px;
    margin: 0 auto;
    width: -webkit-fill-available;
  }
  .title_collapse {
    flex-direction: column;
    align-items: flex-start;
  }
  .title_collapse .collapse {
    margin-left: 0;
  }
}