/* ========================================
   自定义样式优化
   ======================================== */

/* 侧边导航宽度优化 - 仅在必要时调整 */
@media screen and (min-width: 76.25em) {
  .md-sidebar--primary {
    width: 15rem; /* 从默认 12.1rem 适度增加 */
  }
}

/* ========================================
   原有样式：External link preview card
   ======================================== */

.link-preview-card {
  border: 1px solid #e5e7eb;
  border-radius: 8px;
  overflow: hidden;
  margin: 16px 0;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  background-color: #fafafa;
}

.link-preview-title {
  padding: 10px 12px;
  font-weight: 600;
  background-color: #f3f4f6;
  border-bottom: 1px solid #e5e7eb;
  font-size: 0.95em;
}

.link-preview-title a {
  text-decoration: none;
  color: inherit;
}

.link-preview-iframe {
  width: 100%;
  height: 320px;
  border: none;
}