feat: 优化页面布局和交互体验

- 使用sticky定位替代fixed定位，提升滚动体验
- 添加视频播放图标和图片展示功能
- 实现搜索框热门关键词轮播效果
- 优化编辑器链接插入功能
- 调整组件样式和布局细节

css/section.css

@@ -198,6 +198,8 @@
 }
 #sectionIndex .matter .matter-content .details-box .content-box {
   margin-right: 12px;
+  position: sticky;
+  z-index: 1;
 }
 #sectionIndex .matter .matter-content .details-box .content-box .selectives-box {
   width: 100%;
@@ -321,10 +323,8 @@
   color: #7f7f7f;
   margin-top: 10px;
 }
-#sectionIndex .matter .matter-content .details-box .sidebar-box.fixed {
-  position: fixed;
-  right: calc((100% - 1200px) / 2);
-  bottom: 10px;
+#sectionIndex .matter .matter-content .details-box .sidebar-box {
+  position: sticky;
 }
 #sectionIndex .matter .matter-content .details-box .sidebar-box .adv {
   display: block;