From 92e4b9468cdca6d4e3835067dcb9969b72bd2b92 Mon Sep 17 00:00:00 2001
From: Zhe Fang <founchoo@outlook.com>
Date: Thu, 8 Jan 2026 20:58:12 -0500
Subject: [PATCH] feat: enhance ValueTransition (support keyframes)

---
 .../Controls/AboutControl.xaml                |   6 -
 .../Controls/LyricsCanvas.xaml.cs             |  48 +--
 .../Controls/LyricsEffectSettingsControl.xaml |   8 +
 .../Controls/PlaybackSettingsControl.xaml     |   4 -
 .../Enums/WordByWordEffectMode.cs             |  13 +
 .../Helper/DirectoryHelper.cs                 |  51 +++
 .../Helper/PickerHelper.cs                    |  10 +-
 .../Helper/ValueTransition.cs                 | 339 +++++++++++-------
 .../Logic/LyricsAnimator.cs                   |  67 ++--
 .../Logic/LyricsSynchronizer.cs               |  48 ++-
 .../BetterLyrics.WinUI3/Models/Keyframe.cs    |  18 +
 .../Models/Lyrics/RenderLyricsChar.cs         |  21 +-
 .../Models/Lyrics/RenderLyricsLine.cs         |  48 ++-
 .../Models/Settings/GeneralSettings.cs        |   1 -
 .../Models/Settings/LyricsEffectSettings.cs   |   4 +
 .../Renderer/CoverBackgroundRenderer.cs       |  10 +-
 .../FileSystemService/FileSystemService.cs    |   6 +-
 .../LyricsCacheService/ILyricsCacheService.cs |   1 +
 .../LyricsCacheService/LyricsCacheService.cs  |   8 +
 .../Strings/ar/Resources.resw                 |  15 +-
 .../Strings/de/Resources.resw                 |  15 +-
 .../Strings/en/Resources.resw                 |  18 +-
 .../Strings/es/Resources.resw                 |  15 +-
 .../Strings/fr/Resources.resw                 |  15 +-
 .../Strings/hi/Resources.resw                 |  15 +-
 .../Strings/id/Resources.resw                 |  15 +-
 .../Strings/ja/Resources.resw                 |  15 +-
 .../Strings/ko/Resources.resw                 |  15 +-
 .../Strings/ms/Resources.resw                 |  15 +-
 .../Strings/pt/Resources.resw                 |  15 +-
 .../Strings/ru/Resources.resw                 |  15 +-
 .../Strings/th/Resources.resw                 |  15 +-
 .../Strings/vi/Resources.resw                 |  15 +-
 .../Strings/zh-Hans/Resources.resw            |  15 +-
 .../Strings/zh-Hant/Resources.resw            |  15 +-
 .../ViewModels/AboutControlViewModel.cs       |  88 +++--
 36 files changed, 669 insertions(+), 373 deletions(-)
 create mode 100644 BetterLyrics.WinUI3/BetterLyrics.WinUI3/Enums/WordByWordEffectMode.cs
 create mode 100644 BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Keyframe.cs

diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/AboutControl.xaml b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/AboutControl.xaml
index 6397a76..db9efe4 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/AboutControl.xaml
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/AboutControl.xaml
@@ -282,12 +282,6 @@
                         </dev:SettingsExpander.ItemsHeader>
                     </dev:SettingsExpander>
 
-                    <dev:SettingsCard x:Uid="SettingsPageSettingsPlayHistory" Visibility="Collapsed">
-                        <StackPanel Orientation="Horizontal" Spacing="6">
-                            <Button x:Uid="SettingsPageExportPlayHistoryButton" Command="{x:Bind ViewModel.ExportPlayHistoryCommand}" />
-                        </StackPanel>
-                    </dev:SettingsCard>
-
                     <dev:SettingsCard x:Uid="SettingsPageFixedTimeStep" Visibility="Collapsed">
                         <ToggleSwitch IsOn="{x:Bind ViewModel.AppSettings.AdvancedSettings.IsFixedTimeStep, Mode=TwoWay}" />
                     </dev:SettingsCard>
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsCanvas.xaml.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsCanvas.xaml.cs
index 617750f..67a752d 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsCanvas.xaml.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsCanvas.xaml.cs
@@ -58,42 +58,42 @@ namespace BetterLyrics.WinUI3.Controls
 
         private readonly ValueTransition<Color> _immersiveBgColorTransition = new(
             initialValue: Colors.Transparent,
-            durationSeconds: 0.3f,
+            defaultTotalDuration: 0.3f,
             interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
         );
         private readonly ValueTransition<double> _immersiveBgOpacityTransition = new(
             initialValue: 1f,
-            durationSeconds: 0.3f
+            defaultTotalDuration: 0.3f
         );
         private readonly ValueTransition<Color> _accentColor1Transition = new(
             initialValue: Colors.Transparent,
-            durationSeconds: 0.3f,
+            defaultTotalDuration: 0.3f,
             interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
         );
         private readonly ValueTransition<Color> _accentColor2Transition = new(
             initialValue: Colors.Transparent,
-            durationSeconds: 0.3f,
+            defaultTotalDuration: 0.3f,
             interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
         );
         private readonly ValueTransition<Color> _accentColor3Transition = new(
             initialValue: Colors.Transparent,
-            durationSeconds: 0.3f,
+            defaultTotalDuration: 0.3f,
             interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
         );
         private readonly ValueTransition<Color> _accentColor4Transition = new(
             initialValue: Colors.Transparent,
-            durationSeconds: 0.3f,
+            defaultTotalDuration: 0.3f,
             interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
         );
         private readonly ValueTransition<double> _canvasYScrollTransition = new(
             initialValue: 0f,
-            durationSeconds: 0.3f,
-            easingType: EasingType.EaseInOutSine
+            defaultTotalDuration: 0.3f,
+            defaultEasingType: EasingType.EaseInOutSine
         );
         private readonly ValueTransition<double> _mouseYScrollTransition = new(
             initialValue: 0f,
-            durationSeconds: 0.3f,
-            easingType: EasingType.EaseInOutSine
+            defaultTotalDuration: 0.3f,
+            defaultEasingType: EasingType.EaseInOutSine
         );
 
         private TimeSpan _songPositionWithOffset;
@@ -292,7 +292,7 @@ namespace BetterLyrics.WinUI3.Controls
                 }
                 else if (e.Property == MouseScrollOffsetProperty)
                 {
-                    canvas._mouseYScrollTransition.StartTransition(Convert.ToDouble(e.NewValue));
+                    canvas._mouseYScrollTransition.Start(Convert.ToDouble(e.NewValue));
                 }
                 else if (e.Property == MousePositionProperty)
                 {
@@ -318,11 +318,11 @@ namespace BetterLyrics.WinUI3.Controls
                 else if (e.Property == AlbumArtThemeColorsProperty)
                 {
                     var albumArtThemeColors = (AlbumArtThemeColors)e.NewValue;
-                    canvas._immersiveBgColorTransition.StartTransition(albumArtThemeColors.EnvColor);
-                    canvas._accentColor1Transition.StartTransition(albumArtThemeColors.AccentColor1);
-                    canvas._accentColor2Transition.StartTransition(albumArtThemeColors.AccentColor2);
-                    canvas._accentColor3Transition.StartTransition(albumArtThemeColors.AccentColor3);
-                    canvas._accentColor4Transition.StartTransition(albumArtThemeColors.AccentColor4);
+                    canvas._immersiveBgColorTransition.Start(albumArtThemeColors.EnvColor);
+                    canvas._accentColor1Transition.Start(albumArtThemeColors.AccentColor1);
+                    canvas._accentColor2Transition.Start(albumArtThemeColors.AccentColor2);
+                    canvas._accentColor3Transition.Start(albumArtThemeColors.AccentColor3);
+                    canvas._accentColor4Transition.Start(albumArtThemeColors.AccentColor4);
 
                     canvas._albumArtThemeColors = albumArtThemeColors;
                     canvas._isLayoutChanged = true;
@@ -344,7 +344,6 @@ namespace BetterLyrics.WinUI3.Controls
             var lyricsEffect = _lyricsWindowStatus.LyricsEffectSettings;
 
             double songDuration = _gsmtcService.CurrentSongInfo.DurationMs;
-            bool isForceWordByWord = _settingsService.AppSettings.GeneralSettings.IsForceWordByWordEffect;
 
             Color overlayColor;
             double finalOpacity;
@@ -410,7 +409,7 @@ namespace BetterLyrics.WinUI3.Controls
                     return _synchronizer.GetLinePlayingProgress(
                         _songPositionWithOffset.TotalMilliseconds,
                         line,
-                        isForceWordByWord
+                        lyricsEffect.WordByWordEffectMode
                     );
                 }
             );
@@ -486,9 +485,16 @@ namespace BetterLyrics.WinUI3.Controls
                 var targetScroll = LyricsLayoutManager.CalculateTargetScrollOffset(_renderLyricsLines, _primaryPlayingLineIndex);
                 if (targetScroll.HasValue) _canvasTargetScrollOffset = targetScroll.Value;
 
-                _canvasYScrollTransition.SetEasingType(lyricsEffect.LyricsScrollEasingType);
-                _canvasYScrollTransition.SetDuration(lyricsEffect.LyricsScrollDuration / 1000.0);
-                _canvasYScrollTransition.StartTransition(_canvasTargetScrollOffset, _isLayoutChanged);
+                if (_isLayoutChanged)
+                {
+                    _canvasYScrollTransition.JumpTo(_canvasTargetScrollOffset);
+                }
+                else
+                {
+                    _canvasYScrollTransition.SetDurationMs(lyricsEffect.LyricsScrollDuration);
+                    _canvasYScrollTransition.SetEasingType(lyricsEffect.LyricsScrollEasingType);
+                    _canvasYScrollTransition.Start(_canvasTargetScrollOffset);
+                }
             }
             _canvasYScrollTransition.Update(elapsedTime);
 
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsEffectSettingsControl.xaml b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsEffectSettingsControl.xaml
index 6883d36..22546c2 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsEffectSettingsControl.xaml
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/LyricsEffectSettingsControl.xaml
@@ -23,6 +23,14 @@
                         Style="{StaticResource SettingsSectionHeaderTextBlockStyle}"
                         Text="Effect" />
 
+                    <dev:SettingsCard x:Uid="SettingsPageLyricsWordByWordEffectMode" HeaderIcon="{ui:FontIcon FontFamily={StaticResource IconFontFamily}, Glyph=&#xF714;}">
+                        <ComboBox SelectedIndex="{x:Bind LyricsEffectSettings.WordByWordEffectMode, Mode=TwoWay, Converter={StaticResource EnumToIntConverter}}">
+                            <ComboBoxItem x:Uid="SettingsPageLyricsWordByWordEffectModeAuto" />
+                            <ComboBoxItem x:Uid="SettingsPageLyricsWordByWordEffectModeNever" />
+                            <ComboBoxItem x:Uid="SettingsPageLyricsWordByWordEffectModeAlways" />
+                        </ComboBox>
+                    </dev:SettingsCard>
+
                     <!--  模糊效果  -->
                     <dev:SettingsCard x:Uid="SettingsPageLyricsBlurEffect" HeaderIcon="{ui:FontIcon FontFamily={StaticResource IconFontFamily}, Glyph=&#xE727;}">
                         <ToggleSwitch IsOn="{x:Bind LyricsEffectSettings.IsLyricsBlurEffectEnabled, Mode=TwoWay}" />
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/PlaybackSettingsControl.xaml b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/PlaybackSettingsControl.xaml
index 2036240..8003fce 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/PlaybackSettingsControl.xaml
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Controls/PlaybackSettingsControl.xaml
@@ -365,10 +365,6 @@
                             <ToggleSwitch IsOn="{x:Bind ViewModel.AppSettings.GeneralSettings.ListenOnNewPlaybackSource, Mode=TwoWay}" />
                         </dev:SettingsCard>
 
-                        <dev:SettingsCard x:Uid="SettingsPageForceWordByWordEffect">
-                            <ToggleSwitch IsOn="{x:Bind ViewModel.AppSettings.GeneralSettings.IsForceWordByWordEffect, Mode=TwoWay}" />
-                        </dev:SettingsCard>
-
                         <!--  Lyrics translation  -->
                         <TextBlock x:Uid="SettingsPageTranslation" Style="{StaticResource SettingsSectionHeaderTextBlockStyle}" />
                         <dev:SettingsExpander x:Uid="LyricsPageTranslationEnabled" IsExpanded="True">
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Enums/WordByWordEffectMode.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Enums/WordByWordEffectMode.cs
new file mode 100644
index 0000000..b0c623c
--- /dev/null
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Enums/WordByWordEffectMode.cs
@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BetterLyrics.WinUI3.Enums
+{
+    public enum WordByWordEffectMode
+    {
+        Auto,
+        Never,
+        Always,
+    }
+}
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/DirectoryHelper.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/DirectoryHelper.cs
index 171c53d..b875739 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/DirectoryHelper.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/DirectoryHelper.cs
@@ -56,6 +56,57 @@
                 }
                 catch (Exception) { }
             }
+
+            /// <summary>
+            /// https://learn.microsoft.com/zh-cn/dotnet/standard/io/how-to-copy-directories
+            /// </summary>
+            /// <param name="sourceDir"></param>
+            /// <param name="destinationDir"></param>
+            /// <param name="recursive"></param>
+            /// <exception cref="DirectoryNotFoundException"></exception>
+            public static void CopyDirectory(string sourceDir, string destinationDir, bool recursive)
+            {
+                // Get information about the source directory
+                var dir = new DirectoryInfo(sourceDir);
+
+                // Check if the source directory exists
+                if (!dir.Exists)
+                    throw new DirectoryNotFoundException($"Source directory not found: {dir.FullName}");
+
+                // Cache directories before we start copying
+                DirectoryInfo[] dirs = dir.GetDirectories();
+
+                // Create the destination directory
+                Directory.CreateDirectory(destinationDir);
+
+                // Get the files in the source directory and copy to the destination directory
+                foreach (FileInfo file in dir.GetFiles())
+                {
+                    string targetFilePath = Path.Combine(destinationDir, file.Name);
+
+                    CopyLockedFile(file.FullName, targetFilePath);
+                }
+
+                // If recursive and copying subdirectories, recursively call this method
+                if (recursive)
+                {
+                    foreach (DirectoryInfo subDir in dirs)
+                    {
+                        string newDestinationDir = Path.Combine(destinationDir, subDir.Name);
+                        CopyDirectory(subDir.FullName, newDestinationDir, true);
+                    }
+                }
+            }
+
+            private static void CopyLockedFile(string sourcePath, string targetPath)
+            {
+                using (var sourceStream = new FileStream(sourcePath, FileMode.Open, FileAccess.Read, FileShare.ReadWrite))
+                using (var destStream = new FileStream(targetPath, FileMode.Create, FileAccess.Write))
+                {
+                    sourceStream.CopyTo(destStream);
+                }
+            }
+
         }
     }
 }
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/PickerHelper.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/PickerHelper.cs
index 9649548..74962d4 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/PickerHelper.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/PickerHelper.cs
@@ -42,19 +42,23 @@ namespace BetterLyrics.WinUI3.Helper
             return file;
         }
 
-        public static async Task<StorageFile?> PickSaveFileAsync<T>(IDictionary<string, IList<string>> fileTypeChoices)
+        public static async Task<StorageFile?> PickSaveFileAsync<T>(IDictionary<string, IList<string>> fileTypeChoices, string? suggestedFileName = null)
         {
             var window = WindowHook.GetWindow<T>();
 
-            return await PickSaveFileAsync(window, fileTypeChoices);
+            return await PickSaveFileAsync(window, fileTypeChoices, suggestedFileName);
         }
 
-        public static async Task<StorageFile?> PickSaveFileAsync<T>(T? window, IDictionary<string, IList<string>> fileTypeChoices)
+        public static async Task<StorageFile?> PickSaveFileAsync<T>(T? window, IDictionary<string, IList<string>> fileTypeChoices, string? suggestedFileName = null)
         {
             if (window == null) return null;
 
             var picker = new Windows.Storage.Pickers.FileSavePicker();
             picker.FileTypeChoices.AddRange(fileTypeChoices);
+            if (suggestedFileName != null)
+            {
+                picker.SuggestedFileName = suggestedFileName;
+            }
 
             var hwnd = WindowNative.GetWindowHandle(window);
             InitializeWithWindow.Initialize(picker, hwnd);
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/ValueTransition.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/ValueTransition.cs
index 452395b..f87ccc3 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/ValueTransition.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Helper/ValueTransition.cs
@@ -1,163 +1,252 @@
-// 2025/6/23 by Zhe Fang
-
-using BetterLyrics.WinUI3.Enums;
+using BetterLyrics.WinUI3.Enums;
+using BetterLyrics.WinUI3.Models;
 using System;
+using System.Collections.Generic;
 
 namespace BetterLyrics.WinUI3.Helper
 {
-    public class ValueTransition<T>
-        where T : struct
+    public class ValueTransition<T> where T : struct
     {
+        // 状态变量
         private T _currentValue;
-        private double _durationSeconds;
-        private double _delaySeconds;
-        private double _delayRemaining;
-        private EasingType? _easingType;
-        private Func<T, T, double, T> _interpolator;
-        private bool _isTransitioning;
-        private double _progress;
         private T _startValue;
         private T _targetValue;
 
-        public double DurationSeconds => _durationSeconds;
-        public double DelaySeconds => _delaySeconds;
+        // 核心队列
+        private readonly Queue<Keyframe<T>> _keyframeQueue = new Queue<Keyframe<T>>();
 
-        public bool IsTransitioning => _isTransitioning;
+        // 时间控制
+        private double _stepDuration;             // 当前这一段的时长 (动态变化)
+        private double _totalDurationForAutoSplit; // 自动均分模式的总时长
+        private double _configuredDelaySeconds;    // 配置的延迟时长
+
+        // 动画状态
+        private Enums.EasingType? _easingType;
+        private Func<T, T, double, T> _interpolator;
+        private bool _isTransitioning;
+        private double _progress; // 当前段的进度 (0.0 ~ 1.0)
+
+        // 公开属性
         public T Value => _currentValue;
-        public T StartValue => _startValue;
-        public T TargetValue => _targetValue;
-        public EasingType? EasingType => _easingType;
-        public double Progress => _progress;
+        public bool IsTransitioning => _isTransitioning;
+        public T TargetValue => _targetValue; // 获取当前段的目标值
+        public Enums.EasingType? EasingType => _easingType;
+        public double DurationSeconds => _totalDurationForAutoSplit;
 
-        public ValueTransition(T initialValue, double durationSeconds, Func<T, T, double, T>? interpolator = null, EasingType? easingType = null, double delaySeconds = 0)
+        public ValueTransition(T initialValue, double defaultTotalDuration = 0.3, EasingType? defaultEasingType = null, Func<T, T, double, T>? interpolator = null)
         {
             _currentValue = initialValue;
             _startValue = initialValue;
             _targetValue = initialValue;
-            _durationSeconds = durationSeconds;
-            _delaySeconds = delaySeconds;
-            _delayRemaining = 0;
-            _progress = 1f;
-            _isTransitioning = false;
+            _totalDurationForAutoSplit = defaultTotalDuration;
+
+            if (interpolator == null)
+            {
+                // 默认缓动
+                SetEasingType(Enums.EasingType.EaseInOutQuad);
+            }
+            else
+            {
+                _easingType = null;
+                _interpolator = interpolator;
+            }
 
             if (interpolator != null)
             {
                 _interpolator = interpolator;
                 _easingType = null;
             }
-            else if (easingType.HasValue)
+            else if (defaultEasingType != null)
             {
-                _easingType = easingType;
-                _interpolator = GetInterpolatorByEasingType(_easingType.Value);
+                SetEasingType(defaultEasingType);
             }
             else
             {
-                _easingType = Enums.EasingType.EaseInOutQuad;
-                _interpolator = GetInterpolatorByEasingType(_easingType.Value);
+                SetEasingType(Enums.EasingType.EaseInOutQuad);
             }
         }
 
+        #region Configuration
+
         public void SetDuration(double seconds)
         {
-            if (seconds < 0)
-                throw new ArgumentOutOfRangeException(nameof(seconds), "Duration must be positive.");
-            _durationSeconds = seconds;
+            if (seconds < 0) throw new ArgumentOutOfRangeException(nameof(seconds));
+            _totalDurationForAutoSplit = seconds;
         }
 
-        public void SetDurationMs(double millionSeconds)
-        {
-            SetDuration(millionSeconds / 1000.0);
-        }
-
-        public void SetDuration(TimeSpan timeSpan)
-        {
-            SetDuration(timeSpan.TotalSeconds);
-        }
+        public void SetDurationMs(double millionSeconds) => SetDuration(millionSeconds / 1000.0);
 
+        /// <summary>
+        /// 设置启动延迟。
+        /// 原理：在动画队列最前方插入一个“数值不变”的关键帧。
+        /// </summary>
         public void SetDelay(double seconds)
         {
-            _delaySeconds = seconds;
+            _configuredDelaySeconds = seconds;
         }
 
-        private void JumpTo(T value)
+        public void SetEasingType(Enums.EasingType? easingType)
         {
+            _easingType = easingType;
+            _interpolator = GetInterpolatorByEasingType(easingType);
+        }
+
+        #endregion
+
+        #region Control Methods
+
+        /// <summary>
+        /// 立即跳转到指定值（停止动画）
+        /// </summary>
+        public void JumpTo(T value)
+        {
+            _keyframeQueue.Clear();
             _currentValue = value;
             _startValue = value;
             _targetValue = value;
-            _progress = 1f;
-            _delayRemaining = 0;
             _isTransitioning = false;
+            _progress = 0;
         }
 
-        public void Reset(T value)
+        /// <summary>
+        /// 模式 A: 精确控制模式
+        /// 显式指定每一段的目标值和时长。
+        /// </summary>
+        public void Start(params Keyframe<T>[] keyframes)
         {
-            _currentValue = value;
-            _startValue = value;
-            _targetValue = value;
-            _progress = 0f;
-            _delayRemaining = 0;
-            _isTransitioning = false;
-        }
+            if (keyframes == null || keyframes.Length == 0) return;
 
-        public void StartTransition(T targetValue, bool jumpTo = false)
-        {
-            if (jumpTo)
+            PrepareStart();
+
+            // 1. 处理延迟 (插入静止帧)
+            if (_configuredDelaySeconds > 0)
             {
-                JumpTo(targetValue);
-                return;
+                _keyframeQueue.Enqueue(new Keyframe<T>(_currentValue, _configuredDelaySeconds));
             }
 
-            if (!targetValue.Equals(_currentValue))
+            // 2. 入队用户帧
+            foreach (var kf in keyframes)
             {
-                _startValue = _currentValue;
-                _targetValue = targetValue;
-                _progress = 0f;
-                _delayRemaining = _delaySeconds;
-                _isTransitioning = true;
+                _keyframeQueue.Enqueue(kf);
             }
+
+            MoveToNextSegment(firstStart: true);
         }
 
-        public static bool Equals(double x, double y, double tolerance)
+        /// <summary>
+        /// 模式 B: 自动均分模式 (兼容旧写法)
+        /// 指定一串目标值，系统根据 SetDuration 的总时长平均分配。
+        /// </summary>
+        public void Start(params T[] values)
         {
-            var diff = Math.Abs(x - y);
-            return diff <= tolerance || diff <= Math.Max(Math.Abs(x), Math.Abs(y)) * tolerance;
+            if (values == null || values.Length == 0) return;
+
+            // 如果目标就是当前值且只有1帧，直接跳过以省性能
+            if (values.Length == 1 && values[0].Equals(_currentValue) && _configuredDelaySeconds <= 0) return;
+
+            PrepareStart();
+
+            // 1. 处理延迟
+            if (_configuredDelaySeconds > 0)
+            {
+                _keyframeQueue.Enqueue(new Keyframe<T>(_currentValue, _configuredDelaySeconds));
+            }
+
+            // 2. 计算均分时长
+            double autoStepDuration = _totalDurationForAutoSplit / values.Length;
+
+            // 3. 入队生成帧
+            foreach (var val in values)
+            {
+                _keyframeQueue.Enqueue(new Keyframe<T>(val, autoStepDuration));
+            }
+
+            MoveToNextSegment(firstStart: true);
+        }
+
+        #endregion
+
+        #region Core Logic
+
+        private void PrepareStart()
+        {
+            _keyframeQueue.Clear();
+            _isTransitioning = true;
+        }
+
+        private void MoveToNextSegment(bool firstStart = false)
+        {
+            if (_keyframeQueue.Count > 0)
+            {
+                var kf = _keyframeQueue.Dequeue();
+
+                // 起点逻辑：如果是刚开始，起点是当前值；如果是中间切换，起点是上一段的终点
+                _startValue = firstStart ? _currentValue : _targetValue;
+                _targetValue = kf.Value;
+                _stepDuration = kf.Duration;
+
+                if (firstStart) _progress = 0f;
+                // 注意：非 firstStart 时不重置 _progress，保留溢出值以平滑过渡
+            }
+            else
+            {
+                // 队列耗尽，动画结束
+                _currentValue = _targetValue;
+                _isTransitioning = false;
+                _progress = 1f;
+            }
         }
 
         public void Update(TimeSpan elapsedTime)
         {
             if (!_isTransitioning) return;
 
-            if (_delayRemaining > 0)
-            {
-                double consume = Math.Min(_delayRemaining, elapsedTime.TotalSeconds);
-                _delayRemaining -= consume;
-                if (_delayRemaining > 0)
-                    return;
-                elapsedTime = TimeSpan.FromSeconds(elapsedTime.TotalSeconds - consume);
-            }
+            double timeStep = elapsedTime.TotalSeconds;
 
-            if (_durationSeconds <= 0)
+            // 使用 while 处理单帧时间过长跨越多段的情况
+            while (timeStep > 0 && _isTransitioning)
             {
-                _progress = 1f;
-            }
-            else
-            {
-                _progress += elapsedTime.TotalSeconds / _durationSeconds;
-            }
+                // 计算当前帧的步进比例
+                // 极小值保护，防止除以0
+                double progressDelta = (_stepDuration > 0.000001) ? (timeStep / _stepDuration) : 1.0;
 
-            if (_progress >= 1f)
-            {
-                _progress = 1f;
-                _currentValue = _targetValue;
-                _isTransitioning = false;
-            }
-            else
-            {
-                _currentValue = _interpolator(_startValue, _targetValue, _progress);
+                if (_progress + progressDelta >= 1.0)
+                {
+                    // === 当前段结束 ===
+
+                    // 1. 计算这一段实际消耗的时间
+                    double timeConsumed = (1.0 - _progress) * _stepDuration;
+
+                    // 2. 剩余时间留给下一段
+                    timeStep -= timeConsumed;
+
+                    // 3. 修正当前值到目标值
+                    _progress = 1.0;
+                    _currentValue = _targetValue;
+
+                    // 4. 切换到下一段
+                    MoveToNextSegment();
+
+                    // 5. 如果还有下一段，进度归零
+                    if (_isTransitioning) _progress = 0f;
+                }
+                else
+                {
+                    // === 当前段进行中 ===
+                    _progress += progressDelta;
+                    timeStep = 0; // 时间耗尽
+
+                    // 插值计算
+                    _currentValue = _interpolator(_startValue, _targetValue, _progress);
+                }
             }
         }
 
-        private Func<T, T, double, T> GetInterpolatorByEasingType(EasingType? type)
+        #endregion
+
+        #region Interpolators
+
+        private Func<T, T, double, T> GetInterpolatorByEasingType(Enums.EasingType? type)
         {
             if (typeof(T) == typeof(double))
             {
@@ -166,58 +255,32 @@ namespace BetterLyrics.WinUI3.Helper
                     double s = (double)(object)start;
                     double e = (double)(object)end;
                     double t = progress;
+
+                    // 使用 EasingHelper (假设您的项目中已有此辅助类)
                     switch (type)
                     {
-                        case Enums.EasingType.EaseInOutSine:
-                            t = EasingHelper.EaseInOutSine(t);
-                            break;
-                        case Enums.EasingType.EaseInOutQuad:
-                            t = EasingHelper.EaseInOutQuad(t);
-                            break;
-                        case Enums.EasingType.EaseInOutCubic:
-                            t = EasingHelper.EaseInOutCubic(t);
-                            break;
-                        case Enums.EasingType.EaseInOutQuart:
-                            t = EasingHelper.EaseInOutQuart(t);
-                            break;
-                        case Enums.EasingType.EaseInOutQuint:
-                            t = EasingHelper.EaseInOutQuint(t);
-                            break;
-                        case Enums.EasingType.EaseInOutExpo:
-                            t = EasingHelper.EaseInOutExpo(t);
-                            break;
-                        case Enums.EasingType.EaseInOutCirc:
-                            t = EasingHelper.EaseInOutCirc(t);
-                            break;
-                        case Enums.EasingType.EaseInOutBack:
-                            t = EasingHelper.EaseInOutBack(t);
-                            break;
-                        case Enums.EasingType.EaseInOutElastic:
-                            t = EasingHelper.EaseInOutElastic(t);
-                            break;
-                        case Enums.EasingType.EaseInOutBounce:
-                            t = EasingHelper.EaseInOutBounce(t);
-                            break;
-                        case Enums.EasingType.SmoothStep:
-                            t = EasingHelper.SmoothStep(t);
-                            break;
-                        case Enums.EasingType.Linear:
-                            t = EasingHelper.Linear(t);
-                            break;
-                        default:
-                            t = EasingHelper.EaseInOutQuad(t);
-                            break;
+                        case Enums.EasingType.EaseInOutSine: t = EasingHelper.EaseInOutSine(t); break;
+                        case Enums.EasingType.EaseInOutQuad: t = EasingHelper.EaseInOutQuad(t); break;
+                        case Enums.EasingType.EaseInOutCubic: t = EasingHelper.EaseInOutCubic(t); break;
+                        case Enums.EasingType.EaseInOutQuart: t = EasingHelper.EaseInOutQuart(t); break;
+                        case Enums.EasingType.EaseInOutQuint: t = EasingHelper.EaseInOutQuint(t); break;
+                        case Enums.EasingType.EaseInOutExpo: t = EasingHelper.EaseInOutExpo(t); break;
+                        case Enums.EasingType.EaseInOutCirc: t = EasingHelper.EaseInOutCirc(t); break;
+                        case Enums.EasingType.EaseInOutBack: t = EasingHelper.EaseInOutBack(t); break;
+                        case Enums.EasingType.EaseInOutElastic: t = EasingHelper.EaseInOutElastic(t); break;
+                        case Enums.EasingType.EaseInOutBounce: t = EasingHelper.EaseInOutBounce(t); break;
+                        case Enums.EasingType.SmoothStep: t = EasingHelper.SmoothStep(t); break;
+                        case Enums.EasingType.Linear: t = EasingHelper.Linear(t); break;
+                        default: t = EasingHelper.EaseInOutQuad(t); break;
                     }
+
                     return (T)(object)(s + (e - s) * t);
                 };
             }
-            throw new NotSupportedException($"Easing type {type} is not supported for type {typeof(T)}.");
+
+            throw new NotSupportedException($"Type {typeof(T)} is not supported.");
         }
 
-        public void SetEasingType(EasingType? easingType)
-        {
-            _easingType = easingType;
-            _interpolator = GetInterpolatorByEasingType(easingType);
-        }
+        #endregion
     }
 }
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsAnimator.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsAnimator.cs
index 7da6224..dcb4068 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsAnimator.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsAnimator.cs
@@ -95,13 +95,13 @@ namespace BetterLyrics.WinUI3.Logic
 
                     line.BlurAmountTransition.SetDuration(yScrollDuration);
                     line.BlurAmountTransition.SetDelay(yScrollDelay);
-                    line.BlurAmountTransition.StartTransition(
+                    line.BlurAmountTransition.Start(
                         (isMouseScrolling || isSecondaryLinePlaying) ? 0 :
                         (lyricsEffect.IsLyricsBlurEffectEnabled ? (5 * distanceFactor) : 0));
 
                     line.ScaleTransition.SetDuration(yScrollDuration);
                     line.ScaleTransition.SetDelay(yScrollDelay);
-                    line.ScaleTransition.StartTransition(
+                    line.ScaleTransition.Start(
                         isSecondaryLinePlaying ? _highlightedScale :
                         (lyricsEffect.IsLyricsOutOfSightEffectEnabled ?
                         (_highlightedScale - distanceFactor * (_highlightedScale - _defaultScale)) :
@@ -109,37 +109,37 @@ namespace BetterLyrics.WinUI3.Logic
 
                     line.PhoneticOpacityTransition.SetDuration(yScrollDuration);
                     line.PhoneticOpacityTransition.SetDelay(yScrollDelay);
-                    line.PhoneticOpacityTransition.StartTransition(
+                    line.PhoneticOpacityTransition.Start(
                         isSecondaryLinePlaying ? phoneticOpacity :
                         CalculateTargetOpacity(phoneticOpacity, phoneticOpacity, distanceFactor, isMouseScrolling, lyricsEffect));
 
                     // 原文不透明度（已播放）
                     line.PlayedOriginalOpacityTransition.SetDuration(yScrollDuration);
                     line.PlayedOriginalOpacityTransition.SetDelay(yScrollDelay);
-                    line.PlayedOriginalOpacityTransition.StartTransition(
+                    line.PlayedOriginalOpacityTransition.Start(
                         isSecondaryLinePlaying ? 1.0 :
                         CalculateTargetOpacity(originalOpacity, 1.0, distanceFactor, isMouseScrolling, lyricsEffect));
                     // 原文不透明度（未播放）
                     line.UnplayedOriginalOpacityTransition.SetDuration(yScrollDuration);
                     line.UnplayedOriginalOpacityTransition.SetDelay(yScrollDelay);
-                    line.UnplayedOriginalOpacityTransition.StartTransition(
+                    line.UnplayedOriginalOpacityTransition.Start(
                         isSecondaryLinePlaying ? originalOpacity :
                         CalculateTargetOpacity(originalOpacity, originalOpacity, distanceFactor, isMouseScrolling, lyricsEffect));
 
                     line.TranslatedOpacityTransition.SetDuration(yScrollDuration);
                     line.TranslatedOpacityTransition.SetDelay(yScrollDelay);
-                    line.TranslatedOpacityTransition.StartTransition(
+                    line.TranslatedOpacityTransition.Start(
                         isSecondaryLinePlaying ? translatedOpacity :
                         CalculateTargetOpacity(translatedOpacity, translatedOpacity, distanceFactor, isMouseScrolling, lyricsEffect));
 
                     line.ColorTransition.SetDuration(yScrollDuration);
                     line.ColorTransition.SetDelay(yScrollDelay);
-                    line.ColorTransition.StartTransition(isSecondaryLinePlaying ? fgColor : bgColor);
+                    line.ColorTransition.Start(isSecondaryLinePlaying ? fgColor : bgColor);
 
                     line.AngleTransition.SetEasingType(canvasYScrollTransition.EasingType);
                     line.AngleTransition.SetDuration(yScrollDuration);
                     line.AngleTransition.SetDelay(yScrollDelay);
-                    line.AngleTransition.StartTransition(
+                    line.AngleTransition.Start(
                         (lyricsEffect.IsFanLyricsEnabled && !isMouseScrolling) ?
                         Math.PI * (lyricsEffect.FanLyricsAngle / 180.0) * distanceFactor * (i > primaryPlayingLineIndex ? 1 : -1) :
                         0);
@@ -149,7 +149,7 @@ namespace BetterLyrics.WinUI3.Logic
                     line.YOffsetTransition.SetDelay(yScrollDelay);
                     // 设计之初是当 isLayoutChanged 为真时 jumpTo
                     // 但考虑到动画视觉，强制使用动画
-                    line.YOffsetTransition.StartTransition(targetYScrollOffset);
+                    line.YOffsetTransition.Start(targetYScrollOffset);
                 }
 
                 var maxAnimationDurationMs = Math.Max(line.EndMs - currentPositionMs, 0);
@@ -170,10 +170,15 @@ namespace BetterLyrics.WinUI3.Logic
                             switch (lyricsEffect.LyricsGlowEffectScope)
                             {
                                 case Enums.LyricsEffectScope.LineStartToCurrentChar:
-                                    if (isSecondaryLinePlayingChanged)
+                                    if (isSecondaryLinePlayingChanged && isSecondaryLinePlaying)
                                     {
-                                        renderChar.GlowTransition.SetDurationMs(Math.Min(Time.AnimationDuration.TotalMilliseconds, maxAnimationDurationMs));
-                                        renderChar.GlowTransition.StartTransition(isSecondaryLinePlaying ? targetGlow : 0);
+                                        var stepInOutDuration = Math.Min(Time.AnimationDuration.TotalMilliseconds, maxAnimationDurationMs) / 2.0 / 1000.0;
+                                        var stepLastingDuration = Math.Max(maxAnimationDurationMs / 1000.0 - stepInOutDuration * 2, 0);
+                                        renderChar.GlowTransition.Start(
+                                            new Models.Keyframe<double>(targetGlow, stepInOutDuration),
+                                            new Models.Keyframe<double>(targetGlow, stepLastingDuration),
+                                            new Models.Keyframe<double>(0, stepInOutDuration)
+                                        );
                                     }
                                     break;
                                 default:
@@ -188,12 +193,12 @@ namespace BetterLyrics.WinUI3.Logic
 
                             if (isSecondaryLinePlayingChanged)
                             {
-                                renderChar.FloatTransition.StartTransition(isSecondaryLinePlaying ? targetFloat : 0);
+                                renderChar.FloatTransition.Start(isSecondaryLinePlaying ? targetFloat : 0);
                             }
                             if (isCharPlayingChanged)
                             {
                                 renderChar.FloatTransition.SetDurationMs(Math.Min(lyricsEffect.LyricsFloatAnimationDuration, maxAnimationDurationMs));
-                                renderChar.FloatTransition.StartTransition(0);
+                                renderChar.FloatTransition.Start(0);
                             }
                         }
 
@@ -223,8 +228,14 @@ namespace BetterLyrics.WinUI3.Logic
                             {
                                 if (syllable.DurationMs >= lyricsEffect.LyricsScaleEffectLongSyllableDuration)
                                 {
-                                    renderChar.ScaleTransition.SetDurationMs(Math.Min(syllable.DurationMs, maxAnimationDurationMs) / 2.0);
-                                    renderChar.ScaleTransition.StartTransition(isSyllablePlaying ? targetScale : 1);
+                                    if (isSyllablePlaying)
+                                    {
+                                        var stepDuration = Math.Min(syllable.DurationMs, maxAnimationDurationMs) / 2.0 / 1000.0;
+                                        renderChar.ScaleTransition.Start(
+                                            new Models.Keyframe<double>(targetScale, stepDuration),
+                                            new Models.Keyframe<double>(1.0, stepDuration)
+                                        );
+                                    }
                                 }
                             }
                         }
@@ -239,8 +250,14 @@ namespace BetterLyrics.WinUI3.Logic
                                     {
                                         foreach (var renderChar in syllable.ChildrenRenderLyricsChars)
                                         {
-                                            renderChar.GlowTransition.SetDurationMs(Math.Min(syllable.DurationMs, maxAnimationDurationMs) / 2.0);
-                                            renderChar.GlowTransition.StartTransition(isSyllablePlaying ? targetGlow : 0);
+                                            if (isSyllablePlaying)
+                                            {
+                                                var stepDuration = Math.Min(syllable.DurationMs, maxAnimationDurationMs) / 2.0 / 1000.0;
+                                                renderChar.GlowTransition.Start(
+                                                    new Models.Keyframe<double>(targetGlow, stepDuration),
+                                                    new Models.Keyframe<double>(0, stepDuration)
+                                                );
+                                            }
                                         }
                                     }
                                     break;
@@ -256,20 +273,10 @@ namespace BetterLyrics.WinUI3.Logic
                 // 更新动画
                 foreach (var renderChar in line.PrimaryRenderChars)
                 {
-                    renderChar.ScaleTransition.Update(elapsedTime);
-                    renderChar.GlowTransition.Update(elapsedTime);
-                    renderChar.FloatTransition.Update(elapsedTime);
+                    renderChar.Update(elapsedTime);
                 }
 
-                line.AngleTransition.Update(elapsedTime);
-                line.ScaleTransition.Update(elapsedTime);
-                line.BlurAmountTransition.Update(elapsedTime);
-                line.PhoneticOpacityTransition.Update(elapsedTime);
-                line.PlayedOriginalOpacityTransition.Update(elapsedTime);
-                line.UnplayedOriginalOpacityTransition.Update(elapsedTime);
-                line.TranslatedOpacityTransition.Update(elapsedTime);
-                line.YOffsetTransition.Update(elapsedTime);
-                line.ColorTransition.Update(elapsedTime);
+                line.Update(elapsedTime);
             }
         }
 
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsSynchronizer.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsSynchronizer.cs
index 2b05cce..6619507 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsSynchronizer.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Logic/LyricsSynchronizer.cs
@@ -1,4 +1,5 @@
-using BetterLyrics.WinUI3.Models;
+using BetterLyrics.WinUI3.Enums;
+using BetterLyrics.WinUI3.Models;
 using BetterLyrics.WinUI3.Models.Lyrics;
 using System;
 using System.Collections.Generic;
@@ -67,7 +68,7 @@ namespace BetterLyrics.WinUI3.Logic
         public LinePlaybackState GetLinePlayingProgress(
             double currentTimeMs,
             RenderLyricsLine line,
-            bool isForceWordByWord)
+            WordByWordEffectMode wordByWordEffectMode)
         {
             var state = new LinePlaybackState { SyllableStartIndex = 0, SyllableLength = 0, SyllableProgress = 0 };
 
@@ -87,23 +88,34 @@ namespace BetterLyrics.WinUI3.Logic
                 return state;
             }
 
-            // 逐字
-            if (line.PrimaryRenderSyllables != null && line.PrimaryRenderSyllables.Count > 1)
+            switch (wordByWordEffectMode)
             {
-                return CalculateSyllableProgress(currentTimeMs, line, lineEndMs);
-            }
-
-            // 强制逐字
-            if (isForceWordByWord && line.PrimaryText.Length > 0)
-            {
-                return CalculateSimulatedProgress(currentTimeMs, line, lineEndMs);
-            }
-            else
-            {
-                // 普通行
-                state.SyllableStartIndex = line.PrimaryText.Length;
-                state.SyllableProgress = 1f;
-                return state;
+                case WordByWordEffectMode.Auto:
+                    if (line.PrimaryRenderSyllables.Count > 1)
+                    {
+                        return CalculateSyllableProgress(currentTimeMs, line, lineEndMs);
+                    }
+                    else
+                    {
+                        state.SyllableStartIndex = line.PrimaryText.Length;
+                        state.SyllableProgress = 1f;
+                        return state;
+                    }
+                case WordByWordEffectMode.Never:
+                    state.SyllableStartIndex = line.PrimaryText.Length;
+                    state.SyllableProgress = 1f;
+                    return state;
+                case WordByWordEffectMode.Always:
+                    if (line.PrimaryRenderSyllables.Count > 1)
+                    {
+                        return CalculateSyllableProgress(currentTimeMs, line, lineEndMs);
+                    }
+                    else
+                    {
+                        return CalculateSimulatedProgress(currentTimeMs, line, lineEndMs);
+                    }
+                default:
+                    return state;
             }
         }
 
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Keyframe.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Keyframe.cs
new file mode 100644
index 0000000..7294b89
--- /dev/null
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Keyframe.cs
@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BetterLyrics.WinUI3.Models
+{
+    public struct Keyframe<T>
+    {
+        public T Value { get; }
+        public double Duration { get; }
+
+        public Keyframe(T value, double durationSeconds)
+        {
+            Value = value;
+            Duration = durationSeconds;
+        }
+    }
+}
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsChar.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsChar.cs
index c0fa3c4..ec6c610 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsChar.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsChar.cs
@@ -1,6 +1,7 @@
 using BetterLyrics.WinUI3.Constants;
 using BetterLyrics.WinUI3.Enums;
 using BetterLyrics.WinUI3.Helper;
+using System;
 using Windows.Foundation;
 
 namespace BetterLyrics.WinUI3.Models.Lyrics
@@ -19,20 +20,28 @@ namespace BetterLyrics.WinUI3.Models.Lyrics
         {
             ScaleTransition = new(
                 initialValue: 1.0,
-                durationSeconds: Time.AnimationDuration.TotalSeconds,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: Time.AnimationDuration.TotalSeconds,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             GlowTransition = new(
                 initialValue: 0,
-                durationSeconds: Time.AnimationDuration.TotalSeconds,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: Time.AnimationDuration.TotalSeconds,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             FloatTransition = new(
                 initialValue: 0,
-                durationSeconds: Time.LongAnimationDuration.TotalSeconds,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: Time.LongAnimationDuration.TotalSeconds,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             LayoutRect = layoutRect;
         }
+
+        public void Update(TimeSpan elapsedTime)
+        {
+            ScaleTransition.Update(elapsedTime);
+            GlowTransition.Update(elapsedTime);
+            FloatTransition.Update(elapsedTime);
+        }
+
     }
 }
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsLine.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsLine.cs
index 210c0d3..7322cbe 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsLine.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Lyrics/RenderLyricsLine.cs
@@ -5,6 +5,7 @@ using Microsoft.Graphics.Canvas.Geometry;
 using Microsoft.Graphics.Canvas.Text;
 using Microsoft.Graphics.Canvas.UI.Xaml;
 using Microsoft.UI;
+using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Numerics;
@@ -77,47 +78,47 @@ namespace BetterLyrics.WinUI3.Models.Lyrics
         {
             AngleTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             BlurAmountTransition = new(
                  initialValue: 0,
-                 durationSeconds: AnimationDuration,
-                 easingType: EasingType.EaseInOutSine
+                 defaultTotalDuration: AnimationDuration,
+                 defaultEasingType: EasingType.EaseInOutSine
              );
             PhoneticOpacityTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             PlayedOriginalOpacityTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             UnplayedOriginalOpacityTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             TranslatedOpacityTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             ScaleTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             YOffsetTransition = new(
                 initialValue: 0,
-                durationSeconds: AnimationDuration,
-                easingType: EasingType.EaseInOutSine
+                defaultTotalDuration: AnimationDuration,
+                defaultEasingType: EasingType.EaseInOutSine
             );
             ColorTransition = new(
                 initialValue: Colors.Transparent,
-                durationSeconds: 0.3f,
+                defaultTotalDuration: 0.3f,
                 interpolator: (from, to, progress) => Helper.ColorHelper.GetInterpolatedColor(progress, from, to)
             );
 
@@ -282,5 +283,18 @@ namespace BetterLyrics.WinUI3.Models.Lyrics
             }
         }
 
+        public void Update(TimeSpan elapsedTime)
+        {
+            AngleTransition.Update(elapsedTime);
+            ScaleTransition.Update(elapsedTime);
+            BlurAmountTransition.Update(elapsedTime);
+            PhoneticOpacityTransition.Update(elapsedTime);
+            PlayedOriginalOpacityTransition.Update(elapsedTime);
+            UnplayedOriginalOpacityTransition.Update(elapsedTime);
+            TranslatedOpacityTransition.Update(elapsedTime);
+            YOffsetTransition.Update(elapsedTime);
+            ColorTransition.Update(elapsedTime);
+        }
+
     }
 }
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/GeneralSettings.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/GeneralSettings.cs
index 74d11af..41ca7c5 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/GeneralSettings.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/GeneralSettings.cs
@@ -8,7 +8,6 @@ namespace BetterLyrics.WinUI3.Models.Settings
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial string LanguageCode { get; set; } = "";
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial string LXMusicServer { get; set; } = string.Empty;
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial string AmllTtmlDbBaseUrl { get; set; } = Constants.AmllTTmlDB.BaseUrl;
-        [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool IsForceWordByWordEffect { get; set; } = true;
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial List<string> ShowOrHideLyricsWindowShortcut { get; set; } = new List<string> { "Ctrl", "Alt", "H" };
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool ExitOnLyricsWindowClosed { get; set; } = false;
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool ListenOnNewPlaybackSource { get; set; } = true;
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/LyricsEffectSettings.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/LyricsEffectSettings.cs
index 5be05ce..c443909 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/LyricsEffectSettings.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Models/Settings/LyricsEffectSettings.cs
@@ -6,6 +6,8 @@ namespace BetterLyrics.WinUI3.Models.Settings
 {
     public partial class LyricsEffectSettings : ObservableRecipient, ICloneable
     {
+        [ObservableProperty][NotifyPropertyChangedRecipients] public partial WordByWordEffectMode WordByWordEffectMode { get; set; } = WordByWordEffectMode.Auto;
+     
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool IsLyricsBlurEffectEnabled { get; set; } = true;
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool IsLyricsFadeOutEffectEnabled { get; set; } = true;
         [ObservableProperty][NotifyPropertyChangedRecipients] public partial bool IsLyricsOutOfSightEffectEnabled { get; set; } = true;
@@ -54,6 +56,8 @@ namespace BetterLyrics.WinUI3.Models.Settings
         {
             return new LyricsEffectSettings(this.LyricsScrollTopDuration, this.LyricsScrollDuration, this.LyricsScrollBottomDuration, this.LyricsScrollEasingType)
             {
+                WordByWordEffectMode = this.WordByWordEffectMode,
+
                 IsLyricsBlurEffectEnabled = this.IsLyricsBlurEffectEnabled,
                 IsLyricsFadeOutEffectEnabled = this.IsLyricsFadeOutEffectEnabled,
                 IsLyricsOutOfSightEffectEnabled = this.IsLyricsOutOfSightEffectEnabled,
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Renderer/CoverBackgroundRenderer.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Renderer/CoverBackgroundRenderer.cs
index 3a3eb9d..1d699f6 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Renderer/CoverBackgroundRenderer.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Renderer/CoverBackgroundRenderer.cs
@@ -58,7 +58,7 @@ namespace BetterLyrics.WinUI3.Renderer
 
         public CoverBackgroundRenderer()
         {
-            _crossfadeTransition = new ValueTransition<double>(1.0, 0.7, easingType: EasingType.Linear);
+            _crossfadeTransition = new ValueTransition<double>(1.0, 0.7, defaultEasingType: EasingType.Linear);
         }
 
         public void SetCoverBitmap(CanvasBitmap? newBitmap)
@@ -73,18 +73,18 @@ namespace BetterLyrics.WinUI3.Renderer
 
             if (_currentBitmap == null)
             {
-                _crossfadeTransition.StartTransition(1.0, jumpTo: true);
+                _crossfadeTransition.JumpTo(1.0);
             }
             else
             {
                 if (_previousBitmap == null)
                 {
-                    _crossfadeTransition.StartTransition(1.0, jumpTo: true);
+                    _crossfadeTransition.JumpTo(1.0);
                 }
                 else
                 {
-                    _crossfadeTransition.Reset(0.0);
-                    _crossfadeTransition.StartTransition(1.0);
+                    _crossfadeTransition.JumpTo(0.0);
+                    _crossfadeTransition.Start(1.0);
                 }
             }
 
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/FileSystemService/FileSystemService.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/FileSystemService/FileSystemService.cs
index 8c6440f..1565387 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/FileSystemService/FileSystemService.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/FileSystemService/FileSystemService.cs
@@ -251,11 +251,7 @@ namespace BetterLyrics.WinUI3.Services.FileSystemService
                         .Where(x => x.MediaFolderId == folder.Id)
                         .ExecuteDeleteAsync();
 
-                    // VACUUM 是 SQLite 特有的命令
-                    if (context.Database.IsSqlite())
-                    {
-                        await context.Database.ExecuteSqlRawAsync("VACUUM");
-                    }
+                    await context.Database.ExecuteSqlRawAsync("VACUUM");
                 }
                 finally
                 {
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/ILyricsCacheService.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/ILyricsCacheService.cs
index d4e5495..43b283a 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/ILyricsCacheService.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/ILyricsCacheService.cs
@@ -8,5 +8,6 @@ namespace BetterLyrics.WinUI3.Services.LyricsCacheService
     {
         Task<LyricsCacheItem?> GetLyricsAsync(SongInfo songInfo, LyricsSearchProvider provider);
         Task SaveLyricsAsync(SongInfo songInfo, LyricsCacheItem result);
+        Task ClearCacheAsync();
     }
 }
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/LyricsCacheService.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/LyricsCacheService.cs
index 9612d91..7810805 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/LyricsCacheService.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Services/LyricsCacheService/LyricsCacheService.cs
@@ -69,5 +69,13 @@ namespace BetterLyrics.WinUI3.Services.LyricsCacheService
             await context.SaveChangesAsync();
         }
 
+        public async Task ClearCacheAsync()
+        {
+            using var context = await _contextFactory.CreateDbContextAsync();
+
+            await context.LyricsCache.ExecuteDeleteAsync();
+            await context.Database.ExecuteSqlRawAsync("VACUUM;");
+        }
+
     }
 }
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ar/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ar/Resources.resw
index a61435e..586c494 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ar/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ar/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>فرض البقاء في المقدمة</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>فرض محاكاة تأثير كلمة بكلمة حتى إذا كانت الكلمات الحالية لا تحتوي على معلومات كلمة بكلمة</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>فرض تفعيل تأثير الكلمات كلمة بكلمة</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>معدل إطارات التصيير (FPS)</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>دليل المستخدم</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/de/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/de/Resources.resw
index d1c7efb..d9d1f4e 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/de/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/de/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Immer im Vordergrund erzwingen</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Wort-für-Wort-Simulation erzwingen, auch wenn der aktuelle Songtext keine entsprechenden Infos enthält</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Wort-für-Wort-Effekt erzwingen</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Rendering-FPS</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Benutzerhandbuch</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/en/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/en/Resources.resw
index 029e22e..ce3c074 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/en/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/en/Resources.resw
@@ -891,12 +891,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Force Always on Top</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Force word-by-word simulation even if current lyrics don't have word-by-word info</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Force Word-by-Word Effect</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Render FPS</value>
   </data>
@@ -1143,6 +1137,18 @@
   <data name="SettingsPageLyricsWindowSwitchHotKey.Header" xml:space="preserve">
     <value>Lyrics Window Status Switch Shortcut</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value>Word-by-word Animation Strategy</value>
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value>Always</value>
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAuto.Content" xml:space="preserve">
+    <value>Auto</value>
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value>Never</value>
+  </data>
   <data name="SettingsPageMatchingThreshold.Description" xml:space="preserve">
     <value>Adjusting this value will affect sequential search and best match search results, but will not affect search results in the manual lyrics search interface</value>
   </data>
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/es/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/es/Resources.resw
index 352822e..c749408 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/es/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/es/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Forzar siempre visible</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Forzar simulación palabra por palabra incluso si la letra actual no tiene información palabra por palabra</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Forzar efecto palabra por palabra</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>FPS de renderizado</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Guía de usuario</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/fr/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/fr/Resources.resw
index 35186ff..a417457 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/fr/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/fr/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Forcer toujours au premier plan</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Forcer la simulation mot à mot même si les paroles n'ont pas d'infos mot à mot</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Forcer l'effet mot à mot</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>FPS de rendu</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Guide de l'utilisateur</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/hi/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/hi/Resources.resw
index d9505d8..db24b43 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/hi/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/hi/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>हमेशा शीर्ष पर रखने के लिए बाध्य करें</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>शब्द-दर-शब्द प्रभाव का अनुकरण करने के लिए बाध्य करें, भले ही वर्तमान बोल में शब्द-दर-शब्द जानकारी न हो</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>शब्द-दर-शब्द प्रभाव सक्षम करने के लिए बाध्य करें</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>रेंडरिंग फ्रेम दर</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>उपयोगकर्ता गाइड</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/id/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/id/Resources.resw
index 2bc2f27..04f61d2 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/id/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/id/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Paksa Selalu di Atas</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Paksa simulasi efek kata-demi-kata meskipun lirik saat ini tidak memiliki informasi kata-demi-kata</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Paksa Aktifkan Efek Kata-demi-Kata</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Frame Rate Rendering</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Panduan Pengguna</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ja/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ja/Resources.resw
index 60a9737..0877b35 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ja/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ja/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>常にトップに強制的に表示</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>現在の歌詞に文字単位の情報がない場合でも、文字単位の歌詞シミュレーションをします</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>文字単位の歌詞効果を強制する</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>描画 FPS</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>ユーザーガイド</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ko/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ko/Resources.resw
index 9ccc429..108baf9 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ko/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ko/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>항상 위에 표시 강제</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>현재 가사에 글자 단위 정보가 없더라도 글자 단위 시뮬레이션을 강제합니다</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>단어 단위 효과 강제 적용</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>렌더링 FPS</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>사용자 가이드</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ms/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ms/Resources.resw
index 6289ceb..c7a621e 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ms/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ms/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Paksa Sentiasa di Atas</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Paksa simulasi kesan perkataan-demi-perkataan walaupun lirik semasa tidak mempunyai maklumat perkataan-demi-perkataan</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Paksa Dayakan Kesan Perkataan-demi-Perkataan</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Kadar Bingkai Penyajian (FPS)</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Panduan Pengguna</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/pt/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/pt/Resources.resw
index ec955c6..48e84f5 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/pt/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/pt/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Forçar Sempre no Topo</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Forçar a simulação do efeito palavra por palavra, mesmo que a letra atual não tenha informações palavra por palavra</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Forçar Efeito Palavra por Palavra</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Taxa de Fotogramas de Renderização</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Guia do Utilizador</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ru/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ru/Resources.resw
index 26cf55c..b8afc3f 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ru/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/ru/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Принудительно поверх всех окон</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Принудительно имитировать пословный эффект, даже если текущий текст не имеет пословной информации</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Принудительно включить пословный эффект</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>FPS рендеринга</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Руководство пользователя</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/th/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/th/Resources.resw
index 46e4165..b063908 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/th/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/th/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>บังคับให้อยู่บนสุดเสมอ</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>บังคับจำลองเอฟเฟกต์ทีละคำแม้ว่าเนื้อเพลงปัจจุบันจะไม่มีข้อมูลทีละคำ</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>บังคับเปิดใช้เอฟเฟกต์ทีละคำ</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>เฟรมเรตการเรนเดอร์</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>คู่มือผู้ใช้</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/vi/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/vi/Resources.resw
index fed2c08..0ac7501 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/vi/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/vi/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>Buộc luôn ở trên cùng</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>Buộc mô phỏng hiệu ứng từng từ ngay cả khi lời bài hát hiện tại không có thông tin từng từ</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>Buộc bật hiệu ứng từng từ</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>Tốc độ khung hình kết xuất</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>Hướng dẫn sử dụng</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hans/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hans/Resources.resw
index a2620cb..e81c176 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hans/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hans/Resources.resw
@@ -891,12 +891,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>强制置于顶层</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>即使当前歌词没有逐字信息，仍强制模拟逐字效果</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>强制启用逐字歌词效果</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>渲染帧率</value>
   </data>
@@ -1143,6 +1137,15 @@
   <data name="SettingsPageLyricsWindowSwitchHotKey.Header" xml:space="preserve">
     <value>歌词窗口状态切换快捷键</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAuto.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
   <data name="SettingsPageMatchingThreshold.Description" xml:space="preserve">
     <value>调整此值将影响顺序搜索和最佳匹配搜索结果，但不会影响手动歌词搜索界面中的搜索结果</value>
   </data>
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hant/Resources.resw b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hant/Resources.resw
index 06cfd6c..ea3c613 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hant/Resources.resw
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/Strings/zh-Hant/Resources.resw
@@ -888,12 +888,6 @@
   <data name="SettingsPageForceAlwaysOnTop.Header" xml:space="preserve">
     <value>強制置於頂層</value>
   </data>
-  <data name="SettingsPageForceWordByWordEffect.Description" xml:space="preserve">
-    <value>即使目前歌詞沒有逐字資訊，仍強制模擬逐字效果</value>
-  </data>
-  <data name="SettingsPageForceWordByWordEffect.Header" xml:space="preserve">
-    <value>強制啟用逐字歌詞效果</value>
-  </data>
   <data name="SettingsPageFPS.Header" xml:space="preserve">
     <value>渲染畫面播放速率</value>
   </data>
@@ -1575,4 +1569,13 @@
   <data name="UserGuide.Content" xml:space="preserve">
     <value>使用指南</value>
   </data>
+  <data name="SettingsPageLyricsWordByWordEffectMode.Header" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeAlways.Content" xml:space="preserve">
+    <value />
+  </data>
+  <data name="SettingsPageLyricsWordByWordEffectModeNever.Content" xml:space="preserve">
+    <value />
+  </data>
 </root>
\ No newline at end of file
diff --git a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/ViewModels/AboutControlViewModel.cs b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/ViewModels/AboutControlViewModel.cs
index f0d8e9a..3a18653 100644
--- a/BetterLyrics.WinUI3/BetterLyrics.WinUI3/ViewModels/AboutControlViewModel.cs
+++ b/BetterLyrics.WinUI3/BetterLyrics.WinUI3/ViewModels/AboutControlViewModel.cs
@@ -2,27 +2,35 @@
 using BetterLyrics.WinUI3.Helper.BetterLyrics.WinUI3.Helper;
 using BetterLyrics.WinUI3.Hooks;
 using BetterLyrics.WinUI3.Models.Settings;
+using BetterLyrics.WinUI3.Services.LyricsCacheService;
 using BetterLyrics.WinUI3.Services.SettingsService;
 using BetterLyrics.WinUI3.Views;
 using CommunityToolkit.Mvvm.ComponentModel;
 using CommunityToolkit.Mvvm.Input;
+using Microsoft.Data.Sqlite;
 using Microsoft.UI.Xaml.Controls;
 using System;
+using System.Collections.Generic;
 using System.IO;
+using System.IO.Compression;
 using System.Threading.Tasks;
+using Windows.Storage;
+using WinRT.Interop;
 
 namespace BetterLyrics.WinUI3.ViewModels
 {
     public partial class AboutControlViewModel : BaseViewModel
     {
         private readonly ISettingsService _settingsService;
+        private readonly ILyricsCacheService _lyricsCacheService;
 
         [ObservableProperty]
         public partial AppSettings AppSettings { get; set; }
 
-        public AboutControlViewModel(ISettingsService settingsService)
+        public AboutControlViewModel(ISettingsService settingsService, ILyricsCacheService lyricsCacheService)
         {
             _settingsService = settingsService;
+            _lyricsCacheService = lyricsCacheService;
             AppSettings = _settingsService.AppSettings;
         }
 
@@ -47,18 +55,34 @@ namespace BetterLyrics.WinUI3.ViewModels
         [RelayCommand]
         private async Task ImportSettingsAsync()
         {
-            var file = await PickerHelper.PickSingleFileAsync<SettingsWindow>([".json"]);
+            var file = await PickerHelper.PickSingleFileAsync<SettingsWindow>([".zip"]);
 
             if (file != null)
             {
-                var succeed = _settingsService.ImportSettings(file.Path);
-                if (succeed)
+                try
                 {
+                    GC.Collect();
+                    GC.WaitForPendingFinalizers();
+
+                    SqliteConnection.ClearAllPools();
+
+                    string tempExtractPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+                    Directory.CreateDirectory(tempExtractPath);
+
+                    using (var stream = await file.OpenStreamForReadAsync())
+                    {
+                        ZipFile.ExtractToDirectory(stream, tempExtractPath);
+                    }
+
+                    DirectoryHelper.CopyDirectory(tempExtractPath, PathHelper.LocalFolder, true);
+
+                    Directory.Delete(tempExtractPath, true);
+
                     WindowHook.RestartApp();
                 }
-                else
+                catch (Exception ex)
                 {
-                    ToastHelper.ShowToast("ImportSettingsFailed", null, InfoBarSeverity.Error);
+                    ToastHelper.ShowToast("ImportSettingsFailed", ex.Message, InfoBarSeverity.Error);
                 }
             }
         }
@@ -66,31 +90,49 @@ namespace BetterLyrics.WinUI3.ViewModels
         [RelayCommand]
         private async Task ExportSettingsAsync()
         {
-            var folder = await PickerHelper.PickSingleFolderAsync<SettingsWindow>();
-
-            if (folder != null)
+            try
             {
-                _settingsService.ExportSettings(folder.Path);
+                var suggestedFileName = $"{Constants.App.AppName}_{_settingsService.AppSettings.Version}_{DateTime.Now:yyyyMMdd_HHmmss}";
+                IDictionary<string, IList<string>> fileTypeChoices = new Dictionary<string, IList<string>>()
+                {
+                    { "Zip Archive", new List<string>() { ".zip" } }
+                };
+
+                var destinationFile = await PickerHelper.PickSaveFileAsync<SettingsWindow>(fileTypeChoices, suggestedFileName);
+                if (destinationFile == null) return;
+
+                string tempDir = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString());
+                Directory.CreateDirectory(tempDir);
+
+                DirectoryHelper.CopyDirectory(PathHelper.LocalFolder, tempDir, true);
+
+                string tempZipPath = Path.Combine(Path.GetTempPath(), Guid.NewGuid().ToString() + ".zip");
+
+                ZipFile.CreateFromDirectory(tempDir, tempZipPath);
+
+                using (var sourceStream = File.OpenRead(tempZipPath))
+                using (var destStream = await destinationFile.OpenStreamForWriteAsync())
+                {
+                    sourceStream.CopyTo(destStream);
+                    destStream.SetLength(sourceStream.Length);
+                }
+
+                Directory.Delete(tempDir, true);
+                File.Delete(tempZipPath);
+
                 ToastHelper.ShowToast("ExportSettingsSuccess", null, InfoBarSeverity.Success);
             }
+            catch (Exception ex)
+            {
+                ToastHelper.ShowToast("Error", ex.Message, InfoBarSeverity.Error);
+            }
         }
 
         [RelayCommand]
-        private async Task ExportPlayHistoryAsync()
+        private async Task ClearCacheFilesAsync()
         {
-            var folder = await PickerHelper.PickSingleFolderAsync<SettingsWindow>();
+            await _lyricsCacheService.ClearCacheAsync();
 
-            if (folder != null)
-            {
-                var dest = Path.Combine(folder.Path, $"BetterLyrics_Play_History_Export_{DateTime.Now:yyyyMMdd_HHmmss}.db");
-                await FileHelper.CopyFileAsync(PathHelper.PlayHistoryPath, dest);
-                ToastHelper.ShowToast("ExportSettingsSuccess", null, InfoBarSeverity.Success);
-            }
-        }
-
-        [RelayCommand]
-        private void ClearCacheFiles()
-        {
             DirectoryHelper.DeleteAllFiles(PathHelper.LogDirectory);
             DirectoryHelper.DeleteAllFiles(PathHelper.LyricsCacheDirectory);
             DirectoryHelper.DeleteAllFiles(PathHelper.iTunesAlbumArtCacheDirectory);