/*
Theme Name: SEO18
Version: 1.0
Author: Fixed
*/
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  font-family: "Microsoft YaHei",Arial,sans-serif;
  background: #f6f7fa;
  color: #333;
  line-height: 1.8;
}
a {
  color: #254b7d;
  text-decoration: none;
}
a:hover {
  color: #133057;
}
img {
  max-width: 100%;
  height: auto;
  border-radius: 5px;
  display: block;
}

/* 容器 */
.db_wrap {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 15px;
}

/* 布局 */
.db_flex {
  display: flex;
  gap: 26px;
  margin-top: 20px;
}
@media (max-width:900px) {
  .db_flex {
    flex-direction: column;
  }
}

/* 内容 */
.db_content {
  flex: 1;
}

/* 侧边栏 */
.db_sidebar {
  width: 270px;
}
@media (max-width:900px) {
  .db_sidebar {
    width: 100%;
  }
}

/* 头部 */
.db_header {
  background: #254b7d;
  color: #fff;
  padding: 28px 0;
  text-align: center;
  margin-bottom: 20px;
}
.db_header h1 {
  font-size: 24px;
  font-weight: 500;
}
.db_header a {
  color: #fff;
}

/* 导航 */
.db_nav {
  background: #1a3b63;
  margin-bottom: 20px;
}
.db_nav ul {
  display: flex;
  justify-content: center;
  list-style: none;
  flex-wrap: wrap;
}
.db_nav a {
  color: #fff;
  padding: 13px 20px;
  display: inline-block;
}

/* 文章卡片 */
.db_card {
  background: #fff;
  padding: 22px;
  border-radius: 8px;
  margin-bottom: 16px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
}
.db_thumb {
  width: 100px;
  height: 100px;
  flex-shrink: 0;
}
.db_thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 6px;
}
.db_title {
  font-size: 18px;
  margin-bottom: 6px;
}
.db_date {
  font-size: 12px;
  color: #999;
  margin-bottom: 8px;
}
.db_summary {
  font-size: 14px;
  color: #666;
}

/* 分页 */
.db_page {
  text-align: center;
  margin: 30px 0;
}
.db_page a,.db_page span {
  padding: 8px 14px;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 4px;
  margin: 0 3px;
  display: inline-block;
}
.db_page .current {
  background: #254b7d;
  color: #fff;
  border-color: #254b7d;
}

/* 猜你喜欢 */
.db_rec {
  margin-top: 40px;
}
.db_rec h2 {
  font-size: 18px;
  margin-bottom: 15px;
}
.db_grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 15px;
}
@media (max-width:768px) {
  .db_grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.db_item {
  background: #fff;
  border-radius: 6px;
  overflow: hidden;
}
.db_item img {
  width: 100%;
  height: 110px;
  object-fit: cover;
}
.db_item_title {
  padding: 10px;
  font-size: 13px;
  line-height: 1.5;
}

/* 侧边 */
.db_widget {
  background: #fff;
  padding: 20px;
  border-radius: 8px;
  margin-bottom: 15px;
}
.db_widget h3 {
  font-size: 16px;
  margin-bottom: 15px;
  padding-bottom: 10px;
  border-bottom: 1px solid #eee;
  color: #254b7d;
}
.db_widget ul {
  list-style: none;
}
.db_widget li {
  padding: 6px 0;
  border-bottom: 1px dashed #f0f0f0;
  font-size: 14px;
}

/* 内容页 */
.db_single {
  background: #fff;
  padding: 35px;
  border-radius: 8px;
}
.db_single h1 {
  font-size: 22px;
  text-align: center;
  margin-bottom: 25px;
}
.db_single_content {
  font-size: 16px;
  line-height: 2;
}

/* 相关文章 */
.db_related {
  margin-top: 35px;
}
.db_related h3 {
  margin-bottom: 15px;
  font-size: 18px;
}
.db_related a {
  display: block;
  padding: 8px 0;
  border-bottom: 1px dashed #eee;
  font-size: 15px;
}

/* 底部 */
.db_footer {
  background: #fff;
  padding: 30px 0;
  text-align: center;
  border-top: 1px solid #eee;
  margin-top: 40px;
  font-size: 14px;
  color: #888;
}