/* ========================================
   道德经多版本对照平台 - 主样式文件
   ======================================== */

/* CSS 变量定义 */
:root {
    --bg-primary: #faf8f5;
    --bg-secondary: #f0ebe4;
    --text-primary: #2c1810;
    --text-secondary: #5c4a3d;
    --text-muted: #8b7355;
    --accent-color: #d4a574;
    --border-color: #e0d5c9;
    --card-bg: #ffffff;
    --table-header-bg: #f5f0e8;
    --shadow: 0 2px 8px rgba(44, 24, 16, 0.08);
}

/* 性能优化：字体回退策略 */
@font-face {
    font-family: 'System';
    src: local('Microsoft YaHei'), local('PingFang SC'), local('SimHei'), local('Arial');
    font-display: swap;
}

/* 暗黑模式变量 */
[data-theme="dark"] {
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --text-primary: #e8e0d8;
    --text-secondary: #b8b0a8;
    --text-muted: #888080;
    --accent-color: #c9956a;
    --border-color: #3a3a3a;
    --card-bg: #2a2a2a;
    --table-header-bg: #333333;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* 自动检测系统偏好 */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --bg-primary: #1a1a1a;
        --bg-secondary: #242424;
        --text-primary: #e8e0d8;
        --text-secondary: #b8b0a8;
        --text-muted: #888080;
        --accent-color: #c9956a;
        --border-color: #3a3a3a;
        --card-bg: #2a2a2a;
        --table-header-bg: #333333;
        --shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    }
}

/* 隐藏 Vercel Toolbar */
#vercel-toolbar, 
vercel-live-feedback, 
.vercel-toolbar, 
[data-testid="vercel-toolbar"] {
    display: none !important;
    visibility: hidden !important;
    pointer-events: none !important;
    opacity: 0 !important;
    z-index: -1 !important;
}

/* 确保设置面板在最上层 */
#settingsPanel {
    z-index: 2147483647 !important; /* Max z-index */
    display: flex !important; /* 确保不被意外隐藏 */
    visibility: visible !important;
    opacity: 1 !important; /* 强制不透明 */
}
.font-kaiti { font-family: "楷体", "KaiTi", "STKaiti", serif !important; }
.font-songti { font-family: "宋体", "SimSun", "STSong", serif !important; }
.font-fangsong { font-family: "仿宋", "FangSong", "STFangsong", serif !important; }
.font-mingliu { font-family: "明体", "MingLiU", "PMingLiU", serif !important; }
.font-xkai { font-family: "华文行楷", "STXingkai", cursive !important; }

/* ===== 字体大小 ===== */
.text-small { font-size: 0.875rem !important; }
.text-medium { font-size: 1rem !important; }
.text-large { font-size: 1.25rem !important; }

/* ===== 显示/隐藏选项 ===== */
.hide-pinyin .pinyin { display: none !important; }
.hide-annotation .annotation, .hide-annotation .meaning { display: none !important; }
.hide-modern .modern-chinese { display: none !important; }
.hide-notes .commentary-note { display: none !important; }
.show-english .english-translation { display: block !important; }
.english-translation { display: none !important; }

/* ===== 阅读模式 ===== */
.mode-zen { background: #1a1a1a !important; }
.mode-zen .main-content { max-width: 800px; margin: 0 auto; }
.mode-recite .original-text { font-size: 1.5rem !important; font-weight: 600 !important; }

/* 禅读模式遮罩 */
.zen-mode-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    z-index: 9999;
    display: none;
    justify-content: center;
    align-items: center;
    flex-direction: column;
}

.zen-mode-overlay.show {
    display: flex;
}

.zen-exit-btn {
    padding: 12px 32px;
    font-size: 1.25rem;
    background: transparent;
    color: #fff;
    border: 2px solid #fff;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s;
}

.zen-exit-btn:hover {
    background: #fff;
    color: #000;
}

/* 基础样式 */
* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, color 0.3s ease;
    text-rendering: optimizeLegibility;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 性能优化：为动画元素使用 will-change */
.navbar-brand:hover {
    will-change: transform;
}

.chapter-item:hover {
    will-change: transform, background-color;
}

.sidebar {
    will-change: transform;
}

/* 性能优化：对长内容使用 content-visibility */
.chapter-content {
    contain: layout style;
    content-visibility: auto;
}

/* 导航栏样式 */
.navbar {
    box-shadow: var(--shadow);
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.brand-icon {
    font-size: 1.8rem;
}

.brand-text {
    font-family: 'KaiTi', '楷体', serif;
}

/* 搜索框样式 */
.search-box input {
    width: 200px;
    background-color: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
}

.search-box input::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

.search-box input:focus {
    background-color: rgba(255, 255, 255, 0.3);
    border-color: rgba(255, 255, 255, 0.5);
    color: white;
    box-shadow: none;
}

/* 侧边栏样式 */
.sidebar {
    background-color: var(--bg-secondary);
    border-right: 1px solid var(--border-color);
    height: calc(100vh - 56px);
    position: sticky;
    top: 56px;
    overflow-y: auto;
    transition: transform 0.3s ease;
}

.sidebar-content {
    padding: 1rem 0;
}

.sidebar-title {
    padding: 0 1rem 0.5rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-muted);
    border-bottom: 1px solid var(--border-color);
}

.chapter-list {
    max-height: calc(100vh - 120px);
    overflow-y: auto;
    padding: 0.5rem;
}

.chapter-item {
    padding: 0.75rem 0.5rem;
    color: var(--text-primary);
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 80px;
}

.chapter-item:hover {
    background-color: rgba(212, 165, 116, 0.1);
    color: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background-color: var(--card-hover-bg);
}

.chapter-num {
    font-family: 'KaiTi', '楷体', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
    white-space: nowrap;
}

.chapter-item.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.chapter-item.active .chapter-num {
    color: white;
}

.chapter-item:hover {
    background-color: rgba(212, 165, 116, 0.1);
    color: var(--accent-color);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    background-color: var(--card-hover-bg);
}

.chapter-num {
    font-family: 'KaiTi', '楷体', serif;
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-muted);
}

.chapter-item.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.chapter-item.active .chapter-num {
    color: white;
}

.chapter-item {
    padding: 0.75rem 0.5rem;
    color: var(--text-primary);
    border-radius: 0.5rem;
    transition: all 0.2s ease;
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    text-align: center;
}

.chapter-item:hover {
    background-color: rgba(212, 165, 116, 0.1);
    color: var(--accent-color);
    border-color: var(--accent-color);
    transform: translateX(4px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.chapter-item.active {
    background-color: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}

.chapter-num {
    font-family: 'KaiTi', '楷体', serif;
    font-size: 1rem;
    font-weight: 600;
}

/* 主内容区 */
.main-content {
    padding: 1.5rem;
    min-height: calc(100vh - 56px);
}

/* 卡片样式 */
.card {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(44, 24, 16, 0.12);
}

.card-header {
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

/* 底部样式 */
.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* 暗黑模式切换按钮 */
#themeToggle {
    border: 1px solid rgba(255, 255, 255, 0.3);
    min-width: 38px;
}

#themeToggle:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

/* 侧边栏章节列表响应式 - 单栏/双栏切换 */
/* 移动端：单栏布局 */
@media (max-width: 768px) {
    .chapter-list {
        display: flex;
        flex-direction: column;
        gap: 0.4rem;
        padding: 0.4rem;
    }
    
    .chapter-item {
        padding: 0.7rem;
        justify-content: flex-start;
    }
    
    .chapter-num {
        font-size: 1rem;
    }
}

/* 平板：单栏或双栏布局 */
@media (min-width: 769px) and (max-width: 991px) {
    .chapter-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .chapter-item {
        padding: 0.6rem 0.5rem;
    }
}

/* 桌面：双栏布局 */
@media (min-width: 992px) {
    .chapter-list {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.6rem;
    }
    
    .chapter-item {
        padding: 0.85rem 0.6rem;
    }
}

/* 大屏优化 */
@media (min-width: 1200px) {
    .chapter-list {
        gap: 0.75rem;
    }
    
    .chapter-item {
        padding: 1rem 0.75rem;
    }
}

/* 移动端侧边栏 */
@media (max-width: 991px) {
    .sidebar {
        position: fixed;
        top: 56px;
        left: -260px;
        width: 260px;
        z-index: 1040;
        box-shadow: 2px 0 8px rgba(0, 0, 0, 0.2);
    }

    .sidebar.show {
        transform: translateX(260px);
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        top: 56px;
        left: 0;
        right: 0;
        bottom: 0;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 1039;
    }

    .sidebar-overlay.show {
        display: block;
    }
}

/* 滚动条样式 */
.sidebar::-webkit-scrollbar,
.chapter-list::-webkit-scrollbar {
    width: 4px;
}

.sidebar::-webkit-scrollbar-track,
.chapter-list::-webkit-scrollbar-track {
    background: transparent;
}

.sidebar::-webkit-scrollbar-thumb,
.chapter-list::-webkit-scrollbar-thumb {
    background: var(--accent-color);
    border-radius: 2px;
}

/* 工具提示样式 */
.tooltip-inner {
    background-color: var(--text-primary);
}

/* 搜索结果样式 */
.search-options-bar {
    background-color: var(--bg-secondary);
    padding: 0.75rem;
    border-radius: 0.5rem;
}

.search-results-list {
    max-height: 400px;
    overflow-y: auto;
}

.search-result-item {
    padding: 0.75rem;
    border-bottom: 1px solid var(--border-color);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

.search-result-item:hover {
    background-color: var(--bg-secondary);
}

.search-result-item:last-child {
    border-bottom: none;
}

/* 成语搜索结果 */
.idiom-result {
    background-color: rgba(255, 193, 7, 0.05);
}

[data-theme="dark"] .idiom-result {
    background-color: rgba(255, 193, 7, 0.1);
}

/* 章节搜索结果 */
.chapter-result {
    border-left: 3px solid transparent;
}

.chapter-result:hover {
    border-left-color: var(--accent-color);
}

/* 匹配项 */
.match-item {
    padding: 0.25rem 0;
    padding-left: 0.5rem;
}

.match-item:not(:last-child) {
    margin-bottom: 0.25rem;
}

/* 搜索结果滚动条 */
.search-results-list::-webkit-scrollbar {
    width: 6px;
}

.search-results-list::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

.search-results-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.search-results-list::-webkit-scrollbar-thumb:hover {
    background: var(--accent-color);
}

/* 疑难字标注 - 使用纯CSS方案 */
.difficult {
    border-bottom: 1px dashed var(--accent-color);
    cursor: help;
    position: relative;
    color: inherit;
    display: inline-block;
}

/* 悬停时显示注音和释义 - 显示在文字上方 */
.difficult:hover::after {
    content: attr(data-pinyin) ": " attr(data-meaning);
    position: absolute;
    bottom: 120%;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(44, 24, 16, 0.95);
    color: #fff;
    padding: 6px 10px;
    border-radius: 4px;
    font-size: 12px;
    white-space: nowrap;
    z-index: 9999;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    pointer-events: none;
}

/* 暗黑模式 */
[data-theme="dark"] .difficult:hover::after {
    background-color: rgba(232, 224, 216, 0.95);
    color: #2c1810;
}

/* 小箭头 */
.difficult:hover::before {
    content: "";
    position: absolute;
    bottom: 110%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: rgba(44, 24, 16, 0.95);
}

[data-theme="dark"] .difficult:hover::before {
    border-top-color: rgba(232, 224, 216, 0.95);
}

/* 暗黑模式下原文区域文字颜色 */
[data-theme="dark"] .original-text {
    color: #e8e0d8;
}

[data-theme="dark"] .modern-text,
[data-theme="dark"] .note-text,
[data-theme="dark"] .english-text {
    color: #b8b0a8;
}

/* 加载动画 */
.spinner-border-sm {
    width: 1rem;
    height: 1rem;
}

/* ==================== 媒体控制按钮样式 ==================== */
.media-btn {
    border: 1px solid rgba(255, 255, 255, 0.3);
    min-width: 38px;
    position: relative;
}

.media-btn:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.media-divider {
    width: 1px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.3);
    margin: 0 4px;
}

/* 播放状态动画 */
.music-icon.playing {
    animation: pulse 1.5s ease-in-out infinite;
}

.speech-icon.speaking {
    animation: wave 1s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

@keyframes wave {
    0%, 100% { transform: scale(1); }
    25% { transform: scale(1.05); }
    75% { transform: scale(0.95); }
}

/* ==================== 音量控制面板 ==================== */
.volume-panel,
.speech-panel {
    position: fixed;
    top: 70px;
    right: 20px;
    width: 280px;
    background-color: rgba(44, 24, 16, 0.95);
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
}

.volume-panel.show,
.speech-panel.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

[data-theme="dark"] .volume-panel,
[data-theme="dark"] .speech-panel {
    background-color: rgba(40, 40, 40, 0.98);
    border: 1px solid var(--border-color);
}

.volume-panel-header,
.speech-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    font-weight: 500;
}

[data-theme="dark"] .volume-panel-header,
[data-theme="dark"] .speech-panel-header {
    border-bottom-color: var(--border-color);
}

.volume-panel-body,
.speech-panel-body {
    padding: 16px;
    color: #fff;
}

[data-theme="dark"] .volume-panel-body,
[data-theme="dark"] .speech-panel-body {
    color: var(--text-primary);
}

/* 滑块样式 */
.volume-panel .form-range,
.speech-panel .form-range {
    margin-bottom: 8px;
}

.volume-panel .form-range::-webkit-slider-thumb,
.speech-panel .form-range::-webkit-slider-thumb {
    background-color: var(--accent-color);
}

.volume-panel .form-range::-webkit-slider-runnable-track,
.speech-panel .form-range::-webkit-slider-runnable-track {
    background-color: rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .volume-panel .form-range::-webkit-slider-runnable-track,
[data-theme="dark"] .speech-panel .form-range::-webkit-slider-runnable-track {
    background-color: var(--border-color);
}

.volume-level,
.rate-level {
    text-align: center;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] .volume-level,
[data-theme="dark"] .rate-level {
    color: var(--text-muted);
}

/* 朗读面板样式 */
.speech-option label.form-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 14px;
    margin-bottom: 8px;
}

[data-theme="dark"] .speech-option label.form-label {
    color: var(--text-secondary);
}

.speech-panel .btn-outline-light {
    border-color: rgba(255, 255, 255, 0.3);
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
}

[data-theme="dark"] .speech-panel .btn-outline-light {
    border-color: var(--border-color);
    color: var(--text-secondary);
}

.speech-panel .btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.1);
}

[data-theme="dark"] .speech-panel .btn-outline-light:hover {
    background-color: var(--bg-secondary);
}

.speech-panel .btn-check:checked + .btn-outline-light {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.speech-status {
    text-align: center;
    padding: 8px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

[data-theme="dark"] .speech-status {
    background-color: var(--bg-secondary);
    color: var(--text-muted);
}

.speech-status.active {
    background-color: rgba(212, 165, 116, 0.2);
    color: var(--accent-color);
}

/* 移动端适配 */
@media (max-width: 576px) {
    .volume-panel,
    .speech-panel {
        right: 10px;
        left: 10px;
        width: auto;
    }

    .settings-panel {
        right: 10px;
        left: 10px;
        width: auto;
        max-height: 70vh;
    }
}

/* ==================== 设置面板样式 ==================== */
.settings-panel {
    position: fixed;
    top: 70px;
    right: 20px;
    width: 320px;
    max-height: calc(100vh - 100px);
    background-color: rgba(44, 24, 16, 0.95);
    border-radius: 12px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
    z-index: 1050;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    overflow-y: auto;
}

.settings-panel.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

[data-theme="dark"] .settings-panel {
    background-color: rgba(30, 30, 30, 0.98);
    border: 1px solid var(--border-color);
}

.settings-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #fff;
    font-weight: 600;
    font-size: 16px;
}

[data-theme="dark"] .settings-panel-header {
    border-bottom-color: var(--border-color);
}

.settings-panel-body {
    padding: 16px 20px;
    color: #fff;
}

[data-theme="dark"] .settings-panel-body {
    color: var(--text-primary);
}

.setting-section {
    margin-bottom: 20px;
}

.setting-section:last-child {
    margin-bottom: 0;
}

.setting-label {
    display: block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 10px;
    font-weight: 500;
}

[data-theme="dark"] .setting-label {
    color: var(--text-muted);
}

/* 阅读模式按钮 */
.setting-options {
    display: flex;
    gap: 8px;
}

.mode-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.mode-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.mode-icon {
    font-size: 20px;
}

.mode-text {
    font-size: 12px;
}

[data-theme="dark"] .mode-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .mode-btn:hover {
    background: rgba(212, 165, 116, 0.1);
}

[data-theme="dark"] .mode-btn.active {
    background: var(--accent-color);
    color: #fff;
}

/* 字体大小控制 */
.font-size-control {
    display: flex;
    gap: 8px;
}

.size-btn {
    flex: 1;
    padding: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 13px;
}

.size-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.size-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

[data-theme="dark"] .size-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .size-btn.active {
    background: var(--accent-color);
    color: #fff;
}

/* 开关选项 */
.setting-toggles,
.version-toggles {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.toggle-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-color);
}

.toggle-item span {
    flex: 1;
}

[data-theme="dark"] .toggle-item {
    color: var(--text-secondary);
}

/* 下拉选择框 */
.settings-panel .form-select {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.9);
}

.settings-panel .form-select:focus {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: none;
}

[data-theme="dark"] .settings-panel .form-select {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.settings-panel .form-select option {
    background-color: #2c1810;
    color: #fff;
}

/* ==================== 禅读模式 ==================== */
.zen-mode-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--bg-primary);
    z-index: 2000;
    padding: 40px;
    overflow-y: auto;
}

.zen-mode-overlay.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.zen-exit-btn {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 10px 20px;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    z-index: 2001;
    transition: opacity 0.2s ease;
}

.zen-exit-btn:hover {
    opacity: 0.9;
}

/* 禅读模式下的内容样式 */
.zen-mode-overlay .original-text {
    font-size: clamp(2rem, 5vw, 3rem);
    line-height: 2.5;
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

/* ==================== 字体样式 ==================== */
.font-default {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.font-kaiti {
    font-family: 'KaiTi', '楷体', 'STKaiti', serif;
}

.font-songti {
    font-family: 'SimSun', '宋体', 'STSong', serif;
}

.font-fangsong {
    font-family: 'FangSong', '仿宋', 'STFangsong', serif;
}

.font-mingliu {
    font-family: 'MingLiU', '明体', 'PMingLiU', serif;
}

.font-xkai {
    font-family: 'STXingkai', '华文行楷', 'Xingkai SC', cursive;
}

/* ==================== 字体大小样式 ==================== */
.font-size-small .original-text {
    font-size: clamp(1.2rem, 2.2vw, 1.8rem);
}

.font-size-medium .original-text {
    font-size: clamp(1.5rem, 2.8vw, 2.2rem);
}

.font-size-large .original-text {
    font-size: clamp(2rem, 3.5vw, 2.8rem);
}

/* ==================== 拼音/释义显示控制 ==================== */
.hide-pinyin .difficult::after,
.hide-pinyin .difficult::before {
    display: none;
}

.hide-pinyin .difficult {
    border-bottom: none;
}

.hide-annotation .difficult {
    color: var(--text-primary);
}

/* ==================== 版本显示控制 ==================== */
.hide-modern .modern-section,
.hide-notes .versions-section,
.hide-english .english-section {
    display: none;
}

/* ==================== 赞赏模态框样式 ==================== */
.qr-codes-container {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin: 20px 0;
}

.qr-code-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.qr-placeholder {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-placeholder svg {
    width: 100%;
    height: 100%;
}

.qr-placeholder-large {
    width: 200px;
    height: 200px;
    margin: 0 auto;
    border-radius: 8px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-placeholder-large svg {
    width: 100%;
    height: 100%;
}

/* ==================== 社交分享样式 ==================== */
.share-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.share-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.share-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.share-icon {
    font-size: 24px;
}

.share-wechat {
    border-color: #07c160;
    color: #07c160;
}

.share-wechat:hover {
    background: #07c160;
    color: white;
}

.share-weibo {
    border-color: #e6162d;
    color: #e6162d;
}

.share-weibo:hover {
    background: #e6162d;
    color: white;
}

.share-link {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.share-link:hover {
    background: var(--accent-color);
    color: white;
}

/* ==================== 按钮样式增强 ==================== */
.btn-outline-warning {
    --bs-btn-color: #ffc107;
    --bs-btn-border-color: #ffc107;
    --bs-btn-hover-bg: #ffc107;
    --bs-btn-hover-color: #000;
}

.btn-outline-info {
    --bs-btn-color: #0dcaf0;
    --bs-btn-border-color: #0dcaf0;
    --bs-btn-hover-bg: #0dcaf0;
    --bs-btn-hover-color: #000;
}

/* ==================== 模态框增强 ==================== */
.modal-content {
    border-radius: 12px;
    overflow: hidden;
}

.modal-header {
    border-bottom: 1px solid var(--border-color);
}

[data-theme="dark"] .modal-content {
    background-color: var(--bg-secondary);
    border-color: var(--border-color);
}

[data-theme="dark"] .modal-header {
    border-bottom-color: var(--border-color);
}

[data-theme="dark"] .modal-body {
    color: var(--text-primary);
}

[data-theme="dark"] .modal-footer {
    border-top-color: var(--border-color);
}

/* ==================== 音乐按钮动画效果 ==================== */
.music-icon.playing {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 1;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

/* ==================== 朗读按钮动画效果 ==================== */
.speech-icon.speaking {
    animation: speaking 0.5s ease-in-out infinite;
}

@keyframes speaking {
    0%, 100% {
        transform: scaleY(1);
    }
    50% {
        transform: scaleY(1.2);
    }
}

/* ==================== 移动端优化 ==================== */
@media (max-width: 576px) {
    .qr-codes-container {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .share-buttons {
        flex-direction: column;
    }

    .share-btn {
        flex-direction: row;
        padding: 12px 16px;
        justify-content: center;
    }

    .share-icon {
        font-size: 20px;
    }
}

/* ==================== 目录3列布局 ==================== */
.chapter-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 4px;
}

@media (max-width: 991px) {
    .chapter-list {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 576px) {
    .chapter-list {
        grid-template-columns: repeat(3, 1fr);
        gap: 2px;
    }
}

.chapter-item {
    text-align: center;
    padding: 6px 4px;
    font-size: 13px;
    border-radius: 4px;
    transition: background-color 0.2s;
}

@media (max-width: 576px) {
    .chapter-item {
        font-size: 11px;
        padding: 4px 2px;
    }
}

/* ==================== 布局按钮样式 ==================== */
.layout-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    cursor: pointer;
    transition: all 0.2s ease;
}

.layout-btn:hover {
    background: rgba(255, 255, 255, 0.15);
}

.layout-btn.active {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
}

.layout-icon {
    font-size: 18px;
}

.layout-text {
    font-size: 12px;
}

[data-theme="dark"] .layout-btn {
    background: var(--bg-secondary);
    border-color: var(--border-color);
    color: var(--text-secondary);
}

[data-theme="dark"] .layout-btn:hover {
    background: rgba(212, 165, 116, 0.1);
}

[data-theme="dark"] .layout-btn.active {
    background: var(--accent-color);
    color: #fff;
}

/* ==================== 音量控制内联样式 ==================== */
.volume-control-inline {
    display: flex;
    align-items: center;
    gap: 8px;
}

.volume-label {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    min-width: 32px;
}

.volume-control-inline .form-range {
    flex: 1;
    height: 4px;
}

.volume-value {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.7);
    min-width: 36px;
    text-align: right;
}

/* ==================== 文字布局控制 ==================== */
.text-layout-center .original-text {
    text-align: center;
}

.text-layout-left .original-text {
    text-align: left;
}

/* ==================== 二维码图片样式 ==================== */
.qr-code-img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
    object-fit: contain;
}

.qr-code-img-large {
    width: 200px;
    height: 200px;
    border-radius: 8px;
    object-fit: contain;
}

/* ==================== AI侧边栏样式 ==================== */
.ai-btn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%) !important;
    border: none !important;
    animation: aiPulse 2s ease-in-out infinite;
}

.ai-btn:hover {
    transform: scale(1.05);
}

@keyframes aiPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(102, 126, 234, 0);
    }
}

.ai-sidebar {
    position: fixed;
    top: 70px;
    right: -380px;
    width: 360px;
    height: calc(100vh - 70px);
    background: linear-gradient(180deg, rgba(44, 24, 16, 0.98) 0%, rgba(30, 16, 10, 0.98) 100%);
    border-left: 1px solid rgba(212, 165, 116, 0.3);
    box-shadow: -4px 0 20px rgba(0, 0, 0, 0.3);
    z-index: 1040;
    display: flex;
    flex-direction: column;
    transition: right 0.3s ease;
}

.ai-sidebar.show {
    right: 0;
}

[data-theme="dark"] .ai-sidebar {
    background: linear-gradient(180deg, var(--bg-secondary) 0%, rgba(20, 20, 20, 0.98) 100%);
    border-left-color: var(--border-color);
}

.ai-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px;
    border-bottom: 1px solid rgba(212, 165, 116, 0.2);
}

.ai-title {
    color: var(--accent-color);
    margin: 0;
    font-size: 16px;
}

.ai-actions {
    display: flex;
    gap: 8px;
}

.ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 16px;
}

.ai-welcome {
    text-align: center;
    padding: 30px 20px;
    color: rgba(255, 255, 255, 0.8);
}

.ai-welcome-icon {
    font-size: 48px;
    margin-bottom: 16px;
}

.ai-welcome h6 {
    color: var(--accent-color);
    margin-bottom: 12px;
}

.ai-welcome p {
    font-size: 14px;
    margin-bottom: 12px;
}

.ai-welcome ul {
    text-align: left;
    display: inline-block;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.7);
}

.ai-message {
    margin-bottom: 16px;
    animation: aiMessageIn 0.3s ease;
}

@keyframes aiMessageIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-message.user {
    text-align: right;
}

.ai-message-content {
    display: inline-block;
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 14px;
    line-height: 1.6;
}

.ai-message.user .ai-message-content {
    background: var(--accent-color);
    color: #fff;
    border-bottom-right-radius: 4px;
}

.ai-message.assistant .ai-message-content {
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.9);
    border-bottom-left-radius: 4px;
}

[data-theme="dark"] .ai-message.assistant .ai-message-content {
    background: var(--bg-primary);
    color: var(--text-primary);
}

.ai-message-header {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 6px;
    font-size: 12px;
    color: rgba(255, 255, 255, 0.6);
}

.ai-message.user .ai-message-header {
    justify-content: flex-end;
}

.ai-typing {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
}

.ai-typing span {
    width: 8px;
    height: 8px;
    background: var(--accent-color);
    border-radius: 50%;
    animation: aiTyping 1.4s ease-in-out infinite;
}

.ai-typing span:nth-child(2) {
    animation-delay: 0.2s;
}

.ai-typing span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes aiTyping {
    0%, 60%, 100% {
        transform: translateY(0);
    }
    30% {
        transform: translateY(-8px);
    }
}

.ai-suggestions {
    padding: 12px 16px;
    border-top: 1px solid rgba(212, 165, 116, 0.2);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.ai-suggestion-btn {
    padding: 10px 14px;
    background: rgba(212, 165, 116, 0.1);
    border: 1px solid rgba(212, 165, 116, 0.3);
    border-radius: 8px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 13px;
    text-align: left;
    cursor: pointer;
    transition: all 0.2s ease;
}

.ai-suggestion-btn:hover {
    background: rgba(212, 165, 116, 0.2);
    border-color: var(--accent-color);
}

.ai-input-area {
    padding: 16px;
    border-top: 1px solid rgba(212, 165, 116, 0.2);
}

.ai-input-area textarea {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    color: #fff;
    padding: 10px;
    font-size: 14px;
    resize: none;
}

.ai-input-area textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.08);
}

.ai-input-area textarea::placeholder {
    color: rgba(255, 255, 255, 0.4);
}

[data-theme="dark"] .ai-input-area textarea {
    background: var(--bg-primary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.ai-input-actions {
    display: flex;
    gap: 8px;
    margin-top: 8px;
}

.ai-input-actions .form-select {
    flex: 1;
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.8);
}

[data-theme="dark"] .ai-input-actions .form-select {
    background: var(--bg-primary);
    border-color: var(--border-color);
    color: var(--text-primary);
}

.ai-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1035;
}

.ai-overlay.show {
    display: block;
}

/* AI按钮在移动端自适应 */
@media (max-width: 576px) {
    .ai-sidebar {
        width: 100%;
        right: -100%;
    }

    .ai-suggestion-btn {
        font-size: 12px;
        padding: 8px 10px;
    }
}

/* ==================== Fish Audio设置样式 ==================== */
.fish-audio-settings,
.edge-audio-settings {
    display: none;
    padding: 10px;
    background: rgba(0, 0, 0, 0.2);
    border-radius: 6px;
    margin-top: 8px;
}

.fish-audio-settings.show,
.edge-audio-settings.show {
    display: block;
}

[data-theme="dark"] .fish-audio-settings,
[data-theme="dark"] .edge-audio-settings {
    background: rgba(255, 255, 255, 0.05);
}

.fish-audio-settings a,
.edge-audio-settings a {
    text-decoration: none;
}

.fish-audio-settings a:hover,
.edge-audio-settings a:hover {
    text-decoration: underline;
}

/* ==================== 离线模式样式 ==================== */
.offline-mode::after {
    content: "🔴 离线模式";
    position: fixed;
    top: 70px;
    left: 50%;
    transform: translateX(-50%);
    background-color: rgba(220, 38, 38, 0.95);
    color: white;
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    z-index: 1000;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* PWA 更新横幅样式 */
.update-banner-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
}

.update-banner-actions {
    display: flex;
    gap: 8px;
}

/* PWA 安装按钮样式 */
@keyframes installPulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(102, 126, 234, 0.4);
    }
    50% {
        box-shadow: 0 0 0 8px rgba(102, 126, 234, 0);
    }
}

/* ==================== 加载状态优化 ==================== */
.loading-skeleton {
    background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border-color) 50%, var(--bg-secondary) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: 4px;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

/* ==================== 触摸反馈 ==================== */
@media (hover: none) and (pointer: coarse) {
    /* 移动端触摸反馈 */
    .btn:active,
    .card:active,
    .chapter-item:active {
        transform: scale(0.98);
        transition: transform 0.1s ease;
    }

    /* 增大触摸区域 */
    .btn {
        min-height: 44px;
        min-width: 44px;
    }

    .chapter-item {
        padding: 12px 8px;
    }

    /* 优化触摸滚动 */
    .sidebar,
    .ai-sidebar,
    .settings-panel {
        -webkit-overflow-scrolling: touch;
        touch-action: pan-y;
    }
}

/* ==================== 安全区域适配（刘海屏） ==================== */
@supports (padding: env(safe-area-inset-bottom)) {
    .settings-panel,
    .ai-sidebar,
    .speech-panel,
    .volume-panel {
        padding-bottom: env(safe-area-inset-bottom);
    }

    .footer {
        padding-bottom: calc(0.75rem + env(safe-area-inset-bottom));
    }

    .navbar {
        padding-top: env(safe-area-inset-top);
    }
}

/* ==================== 横屏模式优化 ==================== */
@media (orientation: landscape) and (max-height: 600px) {
    .modal-dialog {
        max-height: 95vh;
    }

    .modal-body {
        max-height: calc(95vh - 140px);
        overflow-y: auto;
    }

    .modal .modal-header {
        padding: 0.75rem 1rem;
    }

    .modal .modal-footer {
        padding: 0.5rem 1rem;
    }

    /* 知识图谱横屏优化 */
    #knowledgeGraphModal .modal-body {
        padding: 0.5rem;
    }

    #graphContainer {
        height: calc(95vh - 180px) !important;
    }
}

/* ==================== 知识图谱移动端优化 ==================== */
@media (max-width: 768px) {
    /* 知识图谱模态框全屏显示 */
    #knowledgeGraphModal .modal-dialog {
        max-width: 100%;
        margin: 0;
        height: 100vh;
    }

    #knowledgeGraphModal .modal-content {
        height: 100%;
        border-radius: 0;
        border: none;
    }

    #knowledgeGraphModal .modal-body {
        padding: 0;
        height: calc(100% - 120px);
    }

    #graphContainer {
        height: calc(100% - 60px) !important;
    }

    /* 图谱控制按钮优化 */
    .graph-controls {
        position: fixed;
        bottom: 20px;
        right: 20px;
        z-index: 1060;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .graph-controls button {
        width: 48px;
        height: 48px;
        border-radius: 50%;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    }

    /* 概念列表移动端优化 */
    .concept-list-panel {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        max-height: 40vh;
        z-index: 1055;
        border-radius: 16px 16px 0 0;
        transform: translateY(100%);
        transition: transform 0.3s ease;
    }

    .concept-list-panel.show {
        transform: translateY(0);
    }
}

/* ==================== 虚拟键盘处理 ==================== */
@supports (-webkit-touch-callout: none) {
    /* 防止iOS缩放 */
    input[type="text"],
    input[type="email"],
    input[type="search"],
    textarea {
        font-size: 16px;
    }
}

/* ==================== 小屏设备字体优化 ==================== */
@media (max-width: 375px) {
    body {
        font-size: 14px;
    }

    .chapter-num {
        font-size: 1rem;
    }

    .original-text {
        font-size: 1.1rem;
    }

    .note-text {
        font-size: 0.9rem;
    }
}

/* ==================== 平板竖屏优化 ==================== */
@media (min-width: 768px) and (max-width: 1024px) and (orientation: portrait) {
    .sidebar {
        width: 200px;
    }

    .main-content {
        padding: 1rem;
    }

    .chapter-item {
        padding: 0.4rem 0.8rem;
    }
}

/* ==================== 经典切换下拉菜单优化 ==================== */
.classic-dropdown {
    min-width: 320px;
    max-height: 400px;
    overflow-y: auto;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow);
    border-radius: 8px;
    padding: 0.5rem 0;
}

.classic-dropdown .dropdown-header {
    color: var(--accent-color);
    font-weight: 600;
    padding: 0.75rem 1rem;
    font-size: 0.875rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 0.25rem;
}

.classic-dropdown .dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    transition: all 0.2s ease;
    border-radius: 6px;
    margin: 0.125rem 0.5rem;
}

.classic-dropdown .dropdown-item:hover,
.classic-dropdown .dropdown-item:focus {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.classic-dropdown .dropdown-item.active {
    background: var(--accent-color);
    color: #fff;
}

.classic-dropdown .dropdown-item.active .classic-info {
    color: rgba(255, 255, 255, 0.8);
}

.classic-icon {
    font-size: 1.25rem;
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

.classic-name {
    font-weight: 500;
    flex: 1;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.classic-info {
    font-size: 0.75rem;
    color: var(--text-muted);
    white-space: nowrap;
    flex-shrink: 0;
}

/* 经典切换按钮样式 */
.classic-nav .dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.375rem 0.75rem;
    font-weight: 500;
    border-radius: 20px;
    transition: all 0.2s ease;
}

.classic-nav .dropdown-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.5);
}

.classic-nav .dropdown-toggle::after {
    margin-left: 0.25rem;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .classic-dropdown {
        min-width: 280px;
        max-width: calc(100vw - 2rem);
    }

    .classic-info {
        display: none;
    }

    .classic-nav .dropdown-toggle {
        padding: 0.25rem 0.5rem;
    }

    .classic-nav .dropdown-toggle .d-none.d-sm-inline {
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        display: inline-block !important;
    }
}

/* ==================== 侧边栏经典快速切换 ==================== */
.sidebar-classic-switch {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.sidebar-classic-switch .classic-switch-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.sidebar-classic-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.5rem;
}

.sidebar-classic-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.5rem;
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    text-decoration: none;
    transition: all 0.2s ease;
    font-size: 0.75rem;
}

.sidebar-classic-item:hover {
    background: var(--accent-color);
    color: #fff;
    transform: translateY(-2px);
}

.sidebar-classic-item.active {
    background: var(--accent-color);
    color: #fff;
    box-shadow: 0 2px 8px rgba(212, 165, 116, 0.4);
}

.sidebar-classic-icon {
    font-size: 1.25rem;
    margin-bottom: 0.25rem;
}

.sidebar-classic-name {
    font-size: 0.7rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

@media (max-width: 768px) {
    .sidebar-classic-grid {
        grid-template-columns: repeat(4, 1fr);
    }

    .sidebar-classic-name {
        display: none;
    }
}

/* ==================== 设置面板样式 ==================== */
.settings-panel {
    position: fixed;
    top: 0;
    right: -320px;
    width: 320px;
    height: 100vh;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    /* z-index: 1050; 移除这里的 z-index，统一使用上面的 #settingsPanel 规则 */
    transition: right 0.3s ease;
    flex-direction: column;
}

.settings-panel.show {
    right: 0;
}

.settings-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--accent-color);
    color: #fff;
    font-weight: 600;
}

.settings-panel-body {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.setting-section {
    margin-bottom: 1.5rem;
}

.setting-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.font-size-control {
    display: flex;
    gap: 0.5rem;
}

.size-btn {
    flex: 1;
    padding: 0.375rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s;
}

.size-btn:hover {
    border-color: var(--accent-color);
}

.size-btn.active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

/* 阅读模式按钮 */
.setting-options {
    display: flex;
    gap: 0.5rem;
}

.mode-btn, .layout-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 0.5rem;
    border: 1px solid var(--border-color);
    background: var(--bg-primary);
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    gap: 0.25rem;
}

.mode-btn:hover, .layout-btn:hover {
    border-color: var(--accent-color);
    background: var(--hover-bg);
}

.mode-btn.active, .layout-btn.active {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.mode-icon, .layout-icon {
    font-size: 1.25rem;
}

.mode-text, .layout-text {
    font-size: 0.75rem;
}

.setting-toggles {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toggle-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.toggle-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-color);
}

/* 响应式设置面板 */
@media (max-width: 768px) {
    .settings-panel {
        right: -100%;
        width: 100%;
    }
}

/* ==================== AI解读侧边栏样式 ==================== */
.ai-sidebar {
    position: fixed;
    top: 0;
    right: -400px;
    width: 400px;
    height: 100vh;
    background: var(--card-bg);
    border-left: 1px solid var(--border-color);
    box-shadow: -2px 0 10px rgba(0,0,0,0.1);
    z-index: 1050;
    transition: right 0.3s ease;
    display: flex;
    flex-direction: column;
}

.ai-sidebar.show {
    right: 0;
}

.ai-sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--accent-color);
    color: #fff;
    border-bottom: 1px solid var(--border-color);
}

.ai-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 0;
}

.ai-actions {
    display: flex;
    gap: 0.5rem;
}

.ai-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.ai-welcome {
    text-align: center;
    padding: 2rem 1rem;
}

.ai-welcome-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.ai-suggestions {
    padding: 0 1rem 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.ai-suggestion-btn {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    text-align: left;
}

.ai-suggestion-btn:hover {
    background: var(--accent-color);
    color: #fff;
    border-color: var(--accent-color);
}

.ai-input-area {
    padding: 1rem;
    border-top: 1px solid var(--border-color);
}

.ai-input-wrapper {
    display: flex;
    gap: 0.5rem;
}

.ai-input {
    flex: 1;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-primary);
    color: var(--text-primary);
    resize: none;
}

.ai-send-btn {
    padding: 0.75rem 1rem;
    background: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.ai-send-btn:hover {
    background: var(--text-primary);
}

.ai-model-info {
    display: block;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* 响应式AI侧边栏 */
@media (max-width: 768px) {
    .ai-sidebar {
        right: -100%;
        width: 100%;
    }
}

/* ==================== 音乐和朗读面板样式 ==================== */
.volume-panel,
.speech-panel {
    position: fixed;
    bottom: 80px;
    right: 20px;
    width: 280px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
    z-index: 1040;
    display: none;
}

.volume-panel.show,
.speech-panel.show {
    display: block;
}

.volume-panel-header,
.speech-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1rem;
    background: var(--accent-color);
    color: #fff;
    border-radius: 12px 12px 0 0;
}

.volume-panel-body,
.speech-panel-body {
    padding: 1rem;
}

 /* ==================== 音乐控制按钮样式 ==================== */
 .music-controls .media-btn.active,
 .speech-controls .media-btn.active {
     background: var(--accent-color);
     color: #fff;
     border-color: var(--accent-color);
 }

 /* ==================== 搜索历史样式 ==================== */
 .search-box {
     position: relative;
 }

 .search-history-menu {
     position: absolute;
     top: 100%;
     right: 0;
     z-index: 1000;
     width: 320px;
     max-width: 90vw;
     background: var(--card-bg);
     border: 1px solid var(--border-color);
     border-radius: 8px;
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
     margin-top: 8px;
     overflow: hidden;
 }

 .search-history-header {
     background: var(--bg-light);
     border-bottom: 1px solid var(--border-color);
 }

 .search-history-header small {
     font-weight: 500;
     color: var(--text-muted);
 }

 .search-history-header .btn-link {
     font-size: 0.75rem;
     padding: 2px 8px;
     line-height: 1;
 }

 .search-history-list {
     max-height: 400px;
     overflow-y: auto;
 }

 .search-history-item {
     padding: 10px 15px;
     border-bottom: 1px solid var(--border-light);
     transition: background-color 0.15s ease;
 }

 .search-history-item:last-child {
     border-bottom: none;
 }

 .search-history-item:hover {
     background-color: var(--bg-hover);
 }

 .search-history-item:active {
     background-color: var(--bg-active);
 }

 .search-history-query {
     flex: 1;
     min-width: 0;
 }

 .search-history-text {
     font-size: 0.9rem;
     color: var(--text-color);
 }

 .search-history-text strong {
     color: var(--accent-color);
 }

 .search-history-item .badge {
     font-size: 0.65rem;
     padding: 2px 6px;
     font-weight: 500;
 }

 /* 滚动条样式 */
 .search-history-list::-webkit-scrollbar {
     width: 6px;
 }

 .search-history-list::-webkit-scrollbar-track {
     background: var(--bg-light);
 }

 .search-history-list::-webkit-scrollbar-thumb {
     background: var(--border-color);
     border-radius: 3px;
 }

 .search-history-list::-webkit-scrollbar-thumb:hover {
     background: var(--text-muted);
 }

 /* 暗黑模式适配 */
 [data-theme="dark"] .search-history-menu {
     background: var(--card-bg-dark);
     border-color: var(--border-color-dark);
     box-shadow: 0 4px 12px rgba(0, 0, 0, 0.4);
 }

 [data-theme="dark"] .search-history-header {
     background: var(--bg-light-dark);
     border-bottom-color: var(--border-color-dark);
 }

 [data-theme="dark"] .search-history-item {
     border-bottom-color: var(--border-light-dark);
 }

 [data-theme="dark"] .search-history-item:hover {
     background-color: var(--bg-hover-dark);
 }

 [data-theme="dark"] .search-history-item:active {
     background-color: var(--bg-active-dark);
 }

 [data-theme="dark"] .search-history-text {
     color: var(--text-color-dark);
 }

 [data-theme="dark"] .search-history-list::-webkit-scrollbar-track {
     background: var(--bg-light-dark);
 }

 [data-theme="dark"] .search-history-list::-webkit-scrollbar-thumb {
     background: var(--border-color-dark);
 }

 /* ==================== 用户认证样式 ==================== */
 .auth-tabs .nav-pills .nav-link {
     color: var(--text-muted);
     border: 1px solid transparent;
 }

 .auth-tabs .nav-pills .nav-link.active {
     background-color: var(--accent-color);
     color: #fff;
     border-color: var(--accent-color);
 }

 .auth-tabs .nav-pills .nav-link:hover:not(.active) {
     background-color: var(--bg-hover);
     color: var(--text-color);
 }

 [data-theme="dark"] .auth-tabs .nav-pills .nav-link:hover:not(.active) {
     background-color: var(--bg-hover-dark);
     color: var(--text-color-dark);
 }

 .modal-body .form-control {
     border-color: var(--border-color);
     background-color: var(--card-bg);
     color: var(--text-color);
 }

 .modal-body .form-control:focus {
     border-color: var(--accent-color);
     box-shadow: 0 0 0 0.25rem rgba(var(--accent-rgb), 0.3);
 }

 [data-theme="dark"] .modal-body .form-control {
     border-color: var(--border-color-dark);
     background-color: var(--card-bg-dark);
     color: var(--text-color-dark);
 }

 .modal-body .form-text {
     color: var(--text-muted);
     font-size: 0.875rem;
 }

 .btn-primary {
     background-color: var(--accent-color);
     border-color: var(--accent-color);
 }

 .btn-primary:hover {
     background-color: var(--accent-color);
     border-color: var(--accent-color);
     opacity: 0.9;
 }

 .btn-primary:active {
     background-color: var(--accent-color);
     border-color: var(--accent-color);
     opacity: 0.8;
 }

 /* 用户下拉菜单 */
 #loginButton .dropdown-menu {
     border-color: var(--border-color);
     background-color: var(--card-bg);
     min-width: 180px;
 }

 #loginButton .dropdown-menu .dropdown-item {
     color: var(--text-color);
     transition: background-color 0.15s ease;
 }

 #loginButton .dropdown-menu .dropdown-item:hover {
     background-color: var(--bg-hover);
     color: var(--text-color);
 }

 #loginButton .dropdown-menu .dropdown-item.text-danger {
     color: #dc3545;
 }

 [data-theme="dark"] #loginButton .dropdown-menu {
     border-color: var(--border-color-dark);
     background-color: var(--card-bg-dark);
 }

 [data-theme="dark"] #loginButton .dropdown-menu .dropdown-item {
     color: var(--text-color-dark);
 }

 [data-theme="dark"] #loginButton .dropdown-menu .dropdown-item:hover {
     background-color: var(--bg-hover-dark);
 }