fix(player): 赛事详情页恢复顶部 8px 间距（theme-3）

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/player/src/views/MatchDetailView.vue

@@ -453,6 +453,7 @@ function onPickSelection(selId: string, marketId: string) {
 <style scoped>
 .detail-page {
   margin: 0 -16px;
+  padding-top: 8px;
   padding-bottom: 16px;
   background: var(--bg-body);
 }
@@ -472,9 +473,9 @@ function onPickSelection(selId: string, marketId: string) {
   padding: 4px 12px 8px;
   gap: 8px;
   position: sticky;
-  top: -12px;
+  top: 0;
   z-index: 50;
-  margin-top: -12px;
+  margin-bottom: 8px;
   background: var(--bg-glass);
   border-bottom: 1px solid var(--border);
   backdrop-filter: blur(12px);