:root{
  --page-max-width: 1750px;
  --gap: 1rem;
  --card-radius: 20px;
  --card-shadow: 0 6px 18px rgba(17,24,39, 1);
  --card-shadow-hover: 0 10px 30px rgba(17,24,39,0.10);
  --accent: white;
  --muted: white;
  --text: white;
}

/* 全局盒模型 */
*,
*::before,
*::after { box-sizing: border-box; }

/* 容器布局：中间内容 + 右侧 sidebar */
.blog-container {
  display: grid;
  grid-template-columns: 1486px 250px; /* 中间 + 右侧 */
  gap: 1rem;
  max-width: var(--page-max-width);
  margin: 0px auto;
}

/* 中间内容 */
.blog-main {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-left: 0;
  padding-top: 0;
}

/* 页标题 */
.page-title {
  text-align: left;
  color: darkblue;
  font-family: 'Lucida Sans', 'Lucida Sans Regular', 'Lucida Grande', 'Lucida Sans Unicode', Geneva, Verdana, sans-serif;
}

/* 卡片网格 */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 280px));
  gap: var(--gap);
  align-items: start;
}

/* 卡片样式 */
.blog-card {
  display: flex;
  flex-direction: column;
  background: darkblue;
  border-radius: var(--card-radius);
  overflow: hidden;
  box-shadow: var(--card-shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 180ms ease, box-shadow 180ms ease;
  height: auto;
}

.blog-card:hover {
  transform: translateY(-4px) scale(1.01);
  box-shadow: var(--card-shadow-hover);
}

/* 图片 */
.blog-thumb {
  width: 100%;
  height: 140px;
  object-fit: cover;
  display: block;
  background: linear-gradient(180deg, #f3f4f6, #e5e7eb);
}

/* 卡片内容 */
.blog-content {
  padding: 0.85rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  flex: 1 1 auto;
  justify-content: space-between;
}

/* 标题 */
.blog-title {
  margin: 0;
  font-size: 1.05rem;
  line-height: 1.2;
  font-weight: bold;
  color: var(--text);
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 元信息 */
.blog-meta {
  font-size: 0.82rem;
  color: var(--muted);
  display: flex;
  gap: 0.35rem;
  flex-direction: column;
  align-items: start;
  flex-wrap: wrap;
}
.blog-meta .date { white-space: nowrap; }
.blog-meta .author { font-weight: 500; color: white; }
.blog-meta .categories { font-weight: 500; color: white}
.blog-meta .tags { color: white; font-size: 0.82rem; }

/* 摘要 */
.blog-summary {
  margin: 0;
  color: white;
  font-size: 0.92rem;
  line-height: 1.35;
  display: -webkit-box;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 阅读更多 */
.read-more {
  display: inline-block;
  text-align: right;
  margin-top: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  text-decoration: none;
  padding: 0;
  border-radius: 6px;
  transition: background-color 140ms ease, color 140ms ease;
}
.read-more:hover {
  color: red;
  text-decoration: none;
}

/* 右侧 sidebar */
.sidebar-right {
  background: #f9f9f9;
  padding: 1rem;
  background-color: darkblue;
  position: fixed;
  top: 100px;
  bottom: 50px;
  right: 0px;
  width: 270px;
  overflow-y: auto;
  scrollbar-width: thin;
  scrollbar-color: white darkblue;
}
.sidebar-right h3 {
  margin-top: 50px; 
  color: white;
  border-bottom: 1px solid white;
}
.search-box input {
  width: 100%;
  padding: 0.5rem;
  border: 1px solid #ccc;
}
.tags-box ul { list-style: none; padding: 0; margin: 0.5rem 0 0 0; }
.tags-box li { display: inline-block; margin: 0.25rem; }
.tags-box a {
  text-decoration: none;
  color: var(--accent);
  font-size: 0.85rem;
  padding: 0;
}
.tags-box a:hover { color: red; }

/* tag 选中态 */
.tag-link.active {
  color: red;
  font-weight: bold;
}

.categories-box ul { list-style: none; padding: 0; margin: 0.5rem 0 0 0;}
.categories-box li { display: inline-block; margin: 0.25rem; }
.categories-box a {
  text-decoration: none;
  color: var(--accent);
  font-size: 0.85rem;
  padding: 0;
  border-radius: 5px;
  transition: background 0.2s;
}
.categories-box a:hover { color: red; }

.category-link.active {
  color: red;
  font-weight: bold;
}

/* 响应式 */
@media (max-width: 1024px) {
  .blog-container { grid-template-columns: 2fr 1fr; }
  .sidebar-right { display: block; }
}
@media (max-width: 640px) {
  .blog-container { grid-template-columns: 1fr; max-width: 100%; }
  .blog-grid { grid-template-columns: 1fr 1fr; padding: 0.75rem; gap: 0.75rem; width: 100%; }
  .sidebar-right { display: none; }
  .blog-thumb { height: 160px; }
  .page-title { font-size: 1.4rem; margin-bottom: 1rem; }
}