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/public.less

@@ -291,6 +291,32 @@ body {
             margin-bottom: 15px;
             display: block;
         }
+
+        .picture {
+            overflow: auto;
+
+            .picture-videos {
+                position: relative;
+                .icon-play {
+                    position: absolute;
+                    left: calc(50% - 5px);
+                    top: 50%;
+                    transform: translate(-50%, -50%);
+                    width: 40px;
+                }
+            }
+
+            .picture-item {
+                // width: 120px;
+                height: 100px;
+                border-radius: 10px;
+                display: block;
+
+                &:not(:last-child) {
+                    margin-right: 10px;
+                }
+            }
+        }
     }
 
     &.item-offer {
@@ -679,7 +705,7 @@ body {
         .picture {
             overflow: auto;
             .picture-item {
-                width: 120px;
+                // width: 120px;
                 height: 100px;
                 border-radius: 10px;
 
@@ -1725,6 +1751,8 @@ body {
 .head-top {
     margin-top: 20px;
     margin-bottom: 30px;
+    position: relative;
+    z-index: 2;
 
     .logo {
         height: 52px;
@@ -1741,17 +1769,36 @@ body {
         margin-right: 20px;
         transition: all 0.3s;
         position: relative;
+        overflow: hidden;
 
         &.pitch {
             border-color: #000;
         }
 
+        .placeholder-box {
+            position: absolute;
+            top: 0;
+            left: 0;
+            width: calc(100% - 33px);
+            height: 100%;
+            z-index: 1;
+
+            .item {
+                height: 100%;
+                line-height: 40px;
+                padding: 0 15px;
+                color: #7f7f7f;
+                font-size: 14px;
+            }
+        }
+
         .input {
             border: none;
             outline: none;
             height: 100%;
             background-color: transparent;
             font-size: 14px;
+            z-index: 2;
         }
 
         .icon {