style(theme): 客户端切换深色视觉风格

lib/pages/ranking/ranking_page.dart

@@ -27,10 +27,10 @@ const double _rankColumnWidth = 56;
 const double _listCoverWidth = 72;
 const double _listCoverHeight = 96;
 const double _loadMoreThreshold = 200;
-const Color _goldStart = Color(0xFFF3B34C);
-const Color _goldEnd = Color(0xFFD9A23A);
-const Color _bronzeStart = Color(0xFFCD7F32);
-const Color _bronzeEnd = Color(0xFFA9713A);
+const Color _goldStart = AppColors.gold;
+const Color _goldEnd = AppColors.goldDeep;
+const Color _bronzeStart = AppColors.bronze;
+const Color _bronzeEnd = AppColors.bronzeDeep;
 
 /// 剧场榜单页：前三名横排领奖台，第 4 名起纵向列表。
 class RankingPage extends StatefulWidget {
@@ -265,7 +265,7 @@ class _PodiumCard extends StatelessWidget {
                         l10n.topLabel(rank),
                         maxLines: 1,
                         style: const TextStyle(
-                          color: Colors.white,
+                          color: AppColors.onPrimary,
                           fontSize: 11,
                           fontWeight: FontWeight.w800,
                         ),
@@ -335,7 +335,7 @@ class _RankingRow extends StatelessWidget {
         boxShadow: const [AppTheme.cardShadow],
       ),
       child: Material(
-        color: Colors.transparent,
+        color: AppColors.transparent,
         borderRadius: BorderRadius.circular(14),
         clipBehavior: Clip.antiAlias,
         child: InkWell(