/* ================================
   Cassiopeia 响应式优化
   ================================ */

/* 保证图片不溢出 */
img {
  max-width: 100%;
  height: auto;
}

/* 让 iframe (视频、地图) 自适应 */
iframe {
  max-width: 100%;
  height: auto;
}

/* ================================
   手机端样式 (≤768px)
   ================================ */
@media (max-width: 768px) {

  /* 顶部菜单调整 */
  .navbar-nav {
    font-size: 14px;
    line-height: 1.5em;
  }

  /* 菜单按钮（汉堡菜单）更明显 */
  .navbar-toggler {
    padding: 8px 12px;
    font-size: 1rem;
  }

  /* 隐藏侧栏模块，让内容区更宽 */
  .sidebar-left,
  .sidebar-right {
    display: none !important;
  }

  /* 主内容区全宽 */
  .container-main {
    grid-template-columns: 1fr !important;
    padding: 10px;
  }

  /* 标题缩小 */
  h1, h2, h3 {
    font-size: 90%;
  }

  /* 表格自适应滚动 */
  table {
    display: block;
    width: 100%;
    overflow-x: auto;
  }
}

/* ================================
   超小屏 (≤480px)
   ================================ */
@media (max-width: 480px) {

  /* 菜单改为纵向排列 */
  .navbar-nav .nav-item {
    display: block;
    margin: 5px 0;
  }

  /* 按钮缩小一些 */
  button, .btn {
    font-size: 14px;
    padding: 8px 12px;
  }
}
.blog-card {
  border: 1px solid #eee;
  border-radius: 14px;
  overflow: hidden;
  background: #fff;
  transition: transform .2s ease, box-shadow .2s ease;
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}
.blog-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0,0,0,0.08);
}
.blog-card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}
.blog-card-body {
  padding: 1rem;
  flex: 1;
}
.blog-card-title {
  font-size: 1.25rem;
  margin: 0 0 0.5rem;
}
.blog-card-title a {
  text-decoration: none;
  color: #111;
}
.blog-card-title a:hover {
  color: #0f62fe;
}
.blog-card-meta {
  font-size: 0.85rem;
  color: #666;
  margin-bottom: 0.75rem;
}
.blog-card-text {
  font-size: 0.95rem;
  color: #444;
  margin-bottom: 1rem;
}
.blog-card-btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  border-radius: 8px;
  background: #0f62fe;
  color: #fff;
  text-decoration: none;
  font-size: 0.9rem;
}
.blog-card-btn:hover {
  background: #0844b0;
}
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.blog-grid-item {
  display: flex;
}
.blog-pagination {
  margin-top: 2rem;
  text-align: center;
}
.blog-pagination ul {
  display: inline-flex;
  list-style: none;
  gap: 0.5rem;
  padding: 0;
}
.blog-pagination a, .blog-pagination span {
  padding: 0.5rem 0.75rem;
  border: 1px solid #ddd;
  border-radius: 6px;
  text-decoration: none;
  font-size: 0.9rem;
}
.blog-pagination a:hover {
  background: #0f62fe;
  color: #fff;
  border-color: #0f62fe;
}

/* Featured Article */
.featured-article {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 2rem;
}
.featured-img img {
  width: 100%;
  height: 350px;
  object-fit: cover;
  border-radius: 12px;
}
.featured-content {
  padding: 0.5rem;
}
.featured-title {
  font-size: 1.75rem;
  margin: 0.5rem 0;
}
.featured-title a {
  text-decoration: none;
  color: #111;
}
.featured-title a:hover {
  color: #0f62fe;
}
.featured-meta {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 0.75rem;
}
.featured-intro {
  font-size: 1rem;
  color: #444;
  margin-bottom: 1rem;
}
.featured-btn {
  display: inline-block;
  padding: 0.5rem 1rem;
  background: #0f62fe;
  color: #fff;
  border-radius: 8px;
  text-decoration: none;
}
.featured-btn:hover {
  background: #0844b0;
}

/* Grid layout (继承之前的三列) */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 768px) {
  .blog-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .blog-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}