style: 统一全站深色视觉

lib/core/theme/app_colors.dart

@@ -35,8 +35,8 @@ abstract final class AppColors {
   /// 主操作按下态。
   static const bluePressed = Color(0xFFE55A1F);
 
-  /// 链接与次要高亮（禁止大面积铺色）。
-  static const blueSoft = Color(0xFF22D3EE);
+  /// 链接与次要高亮：统一改用中性浅灰，避免旧青色残留。
+  static const blueSoft = Color(0xFFB0B0B0);
   static const secondary = blueSoft;
   static const lavender = blueSoft;
 
@@ -67,13 +67,13 @@ abstract final class AppColors {
   static const onPrimary = Color(0xFFFFFFFF);
 
   /// 页面背景。
-  static const ink = Color(0xFF0B1020);
+  static const ink = Color(0xFF000000);
 
   /// 首页/追剧/我的统一的纯黑内容背景。
   static const appBackground = Color(0xFF000000);
 
   /// 中性深灰卡片与控件表面。
-  static const contentCard = Color(0xFF171717);
+  static const contentCard = Color(0xFF16161A);
   static const contentSurface = Color(0xFF1C1C1E);
   static const contentChip = Color(0xFF2C2C2E);
   static const contentBorder = Color(0x1AFFFFFF);
@@ -105,16 +105,16 @@ abstract final class AppColors {
 
   /// 次级文字与列表 chevron。
   static const textPrimary = Color(0xFFFFFFFF);
-  static const textSecondary = Color(0xFF8E8E93);
-  static const textTertiary = Color(0xFF9E9E9E);
+  static const textSecondary = Color(0xFFB0B0B0);
+  static const textTertiary = Color(0xFF8E8E93);
   static const textTabInactive = Color(0xFFB0B0B0);
   static const textFilterIcon = Color(0xFF7A7A7E);
 
   /// 原生开屏与冷启动过渡底色。
   static const splashInk = ink;
 
-  /// 顶部与页面底同色，靠容器层次区分。
-  static const surfaceTop = ink;
+  /// 页面顶部暖黑色，渐变底部仍收口到纯黑。
+  static const surfaceTop = mineGradientTop;
 
   /// 底部导航底色。
   static const bar = ink;
@@ -127,13 +127,13 @@ abstract final class AppColors {
   static const cardShadow = Color(0x00000000);
 
   /// 卡片与列表容器。
-  static const card = Color(0xFF151B2E);
+  static const card = Color(0xFF16161A);
 
   /// 次要卡片表面。
-  static const cardAlt = card;
+  static const cardAlt = Color(0xFF101010);
 
   /// 浮层、弹窗、输入与嵌套区域。
-  static const raised = Color(0xFF1C2436);
+  static const raised = Color(0xFF1C1C1E);
   static const quick = raised;
   static const input = raised;
 
@@ -156,13 +156,13 @@ abstract final class AppColors {
   /// 橙色强调文案。
   static const accent = blue;
 
-  /// 分割线 rgba(255,255,255,0.06)。
-  static const border = Color(0x0FFFFFFF);
+  /// 统一卡片描边、分割线与输入框边框。
+  static const border = Color(0xFF1C1C1E);
 
   /// 玻璃面板描边。
   static const glassBorder = Color(0x33FFFFFF);
-  static const glassSurfaceStart = Color(0xEB1C2436);
-  static const glassSurfaceEnd = Color(0xD1151B2E);
+  static const glassSurfaceStart = Color(0xEB16161A);
+  static const glassSurfaceEnd = Color(0xD1101010);
 
   /// 角标底与文字。
   static const badgePink = Color(0x33FF6A8A);
@@ -194,7 +194,7 @@ abstract final class AppColors {
   static const inactiveTrack = Color(0x24FFFFFF);
 
   /// 横幅/封面底部渐变。
-  static const bannerScrimMid = Color(0x8A0B1020);
+  static const bannerScrimMid = Color(0x8A1A0C07);
   static const bannerScrimEnd = Color(0xE6000000);
 
   /// 票券虚线等主色描边。

lib/core/theme/app_theme.dart

@@ -8,12 +8,16 @@ import 'app_dimens.dart';
 
 /// 深色视觉主题（默认且唯一）。
 abstract final class AppTheme {
-  /// 页面背景：深色扁平，靠容器层次区分。
+  /// 页面背景：顶部暖黑、底部纯黑，避免旧深蓝渐变。
   static const LinearGradient pageGradient = LinearGradient(
     begin: Alignment.topCenter,
     end: Alignment.bottomCenter,
-    colors: [AppColors.surfaceTop, AppColors.ink],
-    stops: [0, 0.24],
+    colors: [
+      AppColors.mineGradientTop,
+      AppColors.mineGradientMiddle,
+      AppColors.mineGradientBottom,
+    ],
+    stops: [0, 0.4, 0.75],
   );
 
   /// 卡片阴影关闭，改用底色与分割线。
@@ -76,7 +80,7 @@ abstract final class AppTheme {
       ),
       textButtonTheme: TextButtonThemeData(
         style: TextButton.styleFrom(
-          foregroundColor: AppColors.secondary,
+          foregroundColor: AppColors.primary,
           shape: RoundedRectangleBorder(borderRadius: _buttonRadius),
         ),
       ),
@@ -107,12 +111,12 @@ abstract final class AppTheme {
       ),
       outlinedButtonTheme: OutlinedButtonThemeData(
         style: ButtonStyle(
-          foregroundColor: const WidgetStatePropertyAll(AppColors.blue),
+          foregroundColor: const WidgetStatePropertyAll(AppColors.textPrimary),
           minimumSize: const WidgetStatePropertyAll(
             Size(0, AppDimens.buttonHeight),
           ),
           side: const WidgetStatePropertyAll(
-            BorderSide(color: AppColors.border),
+            BorderSide(color: AppColors.mineOutline),
           ),
           shape: WidgetStatePropertyAll(
             RoundedRectangleBorder(borderRadius: _buttonRadius),
@@ -148,20 +152,20 @@ abstract final class AppTheme {
         ),
       ),
       appBarTheme: const AppBarTheme(
-        backgroundColor: AppColors.card,
-        foregroundColor: AppColors.onSurface,
+        backgroundColor: AppColors.transparent,
+        foregroundColor: AppColors.textPrimary,
         elevation: 0,
         scrolledUnderElevation: 0,
         surfaceTintColor: AppColors.transparent,
         systemOverlayStyle: SystemUiOverlayStyle.light,
         titleTextStyle: TextStyle(
-          color: AppColors.onSurface,
+          color: AppColors.textPrimary,
           fontFamily: 'Outfit',
           fontSize: AppDimens.pageTitle,
           fontWeight: FontWeight.w800,
         ),
       ),
-      iconTheme: const IconThemeData(color: AppColors.onSurface),
+      iconTheme: const IconThemeData(color: AppColors.textPrimary),
       dividerTheme: const DividerThemeData(
         color: AppColors.border,
         thickness: 1,

lib/core/widgets/plain_page_scaffold.dart

@@ -3,6 +3,7 @@
 import 'package:flutter/material.dart';
 
 import '../theme/app_colors.dart';
+import '../theme/app_theme.dart';
 import 'subpage_header.dart';
 
 /// 二级页面通用骨架：返回栏 + 标题/副标题 + 可滚动内容，无底部导航。
@@ -27,17 +28,20 @@ class PlainPageScaffold extends StatelessWidget {
     return Scaffold(
       key: pageKey,
       backgroundColor: AppColors.ink,
-      body: SafeArea(
-        child: Column(
-          crossAxisAlignment: CrossAxisAlignment.start,
-          children: [
-            AppSubpageHeader(
-              title: title,
-              subtitle: subtitle,
-              backKey: backKey,
-            ),
-            Expanded(child: child),
-          ],
+      body: DecoratedBox(
+        decoration: const BoxDecoration(gradient: AppTheme.pageGradient),
+        child: SafeArea(
+          child: Column(
+            crossAxisAlignment: CrossAxisAlignment.start,
+            children: [
+              AppSubpageHeader(
+                title: title,
+                subtitle: subtitle,
+                backKey: backKey,
+              ),
+              Expanded(child: child),
+            ],
+          ),
         ),
       ),
     );

lib/core/widgets/subpage_header.dart

@@ -14,9 +14,7 @@ const double _subtitleFontSize = 12;
 const double _actionGap = 8;
 const double _iconSize = 22;
 const double _iconWeight = 600;
-const double _borderWidth = 1;
 const double _shadowBlur = 8;
-const Offset _lightShadowOffset = Offset(0, 2);
 
 /// 二级页面统一圆形操作按钮，返回、分享和更多共用同一尺寸与表面样式。
 class AppSubpageCircleButton extends StatelessWidget {
@@ -47,24 +45,18 @@ class AppSubpageCircleButton extends StatelessWidget {
           key: const Key('subpage-back-shadow'),
           decoration: BoxDecoration(
             shape: BoxShape.circle,
-            boxShadow: [
-              BoxShadow(
-                color: dark ? AppColors.shadowSoft : AppColors.shadowSubtle,
-                blurRadius: _shadowBlur,
-                offset: dark ? Offset.zero : _lightShadowOffset,
-              ),
-            ],
+            boxShadow: dark
+                ? const [
+                    BoxShadow(
+                      color: AppColors.shadowSoft,
+                      blurRadius: _shadowBlur,
+                    ),
+                  ]
+                : const [],
           ),
           child: Material(
-            color: dark ? AppColors.headerScrim : AppColors.card,
-            shape: CircleBorder(
-              side: dark
-                  ? BorderSide.none
-                  : const BorderSide(
-                      color: AppColors.border,
-                      width: _borderWidth,
-                    ),
-            ),
+            color: dark ? AppColors.headerScrim : AppColors.transparent,
+            shape: const CircleBorder(),
             clipBehavior: Clip.antiAlias,
             child: InkWell(
               customBorder: const CircleBorder(),
@@ -72,7 +64,7 @@ class AppSubpageCircleButton extends StatelessWidget {
               child: Center(
                 child: Icon(
                   icon,
-                  color: AppColors.onSurface,
+                  color: dark ? AppColors.onSurface : AppColors.textPrimary,
                   size: _iconSize,
                   weight: _iconWeight,
                 ),
@@ -85,7 +77,7 @@ class AppSubpageCircleButton extends StatelessWidget {
   }
 }
 
-/// 二级页面统一返回按钮，浅色页使用白底描边，深色页使用半透明黑底。
+/// 二级页面统一返回按钮，普通页透明，沉浸页使用半透明黑底。
 class AppSubpageBackButton extends StatelessWidget {
   const AppSubpageBackButton({
     super.key,
@@ -133,8 +125,8 @@ class AppSubpageHeader extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final foreground = AppColors.onSurface;
-    final secondary = AppColors.muted;
+    final foreground = AppColors.textPrimary;
+    final secondary = AppColors.textSecondary;
     return SizedBox(
       key: const Key('subpage-header'),
       height: subtitle == null ? _height : _heightWithSubtitle,