/* =============================================
   烟の书库 - 公共样式（参考linovelib优化）
   设计风格：梦幻治愈 + 简洁现代
   ============================================= */

/* 全局防止内容溢出 */
html {
    overflow-x: hidden;
    max-width: 100vw;
}

body {
    overflow-x: hidden;
    max-width: 100vw;
    word-wrap: break-word;
    overflow-wrap: break-word;
}

* {
    box-sizing: border-box;
}

img, video, iframe, embed, object {
    max-width: 100%;
    height: auto;
}

pre, code, table {
    max-width: 100%;
    overflow-x: auto;
}

/* CSS变量定义 */
:root {
    /* 主色调 - 柔和女性化配色 */
    --primary-color: #D4A5A5;
    --primary-light: #F2D7D7;
    --primary-dark: #B88A8A;
    --primary-bg: rgba(212, 165, 165, 0.1);
    
    /* 辅助色 */
    --secondary-color: #9FB6CD;
    --secondary-light: #C5D5E4;
    --accent-color: #E8B4B8;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #D4A5A5 0%, #E8B4B8 100%);
    --gradient-navbar: linear-gradient(90deg, #D4A5A5 0%, #E8B4B8 100%);
    --gradient-button: linear-gradient(135deg, #D4A5A5 0%, #B88A8A 100%);
    --gradient-card: linear-gradient(180deg, rgba(212, 165, 165, 0.08) 0%, rgba(232, 180, 184, 0.05) 100%);
    
    /* 功能色 */
    --success-color: #4ECDC4;
    --warning-color: #FFD93D;
    --danger-color: #FF6B6B;
    
    /* 背景色 - 奶油色主题 */
    --bg-body: #FFFAF7;
    --bg-primary: #FFFFFF;
    --bg-secondary: #FFF8F0;
    --bg-tertiary: #F5E6D3;
    --bg-card: #FFFFFF;
    --color-cream: #FFF8F0;
    --color-cream-dark: #F5E6D3;
    
    /* 文字颜色 */
    --text-primary: #5A4A4A;
    --text-secondary: #6A5A5A;
    --text-tertiary: #7A6A6A;
    --text-light: #8B7B7B;
    --text-muted: #9A8A8A;
    
    /* 页脚颜色 - 默认黑色背景 */
    --footer-bg: #1A1A2E;
    --footer-text: #E8E8F0;
    --footer-text-secondary: #B8B8C8;
    --footer-link: #D4A5A5;
    --footer-link-hover: #E8B4B8;
    
    /* 边框和阴影 - 更柔和 */
    --border-color: #F2D7D7;
    --border-light: #F5E6D3;
    --shadow-sm: 0 2px 8px rgba(212, 165, 165, 0.1);
    --shadow-md: 0 4px 16px rgba(212, 165, 165, 0.15);
    --shadow-lg: 0 8px 32px rgba(212, 165, 165, 0.2);
    --shadow-xl: 0 12px 48px rgba(212, 165, 165, 0.25);
    --shadow-primary: 0 4px 16px rgba(212, 165, 165, 0.2);
    
    /* 圆角 - 更大更柔和 */
    --radius-xs: 8px;
    --radius-sm: 12px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;
    --radius-2xl: 40px;
    
    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* 间距 - 更宽松 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-2xl: 64px;
    
    /* 导航栏高度 */
    --navbar-height: 60px;
    --navbar-height-mobile: 56px;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-body: #0D0D14;
    --bg-primary: #16161F;
    --bg-secondary: #1A1A25;
    --bg-tertiary: #222230;
    --bg-card: #1E1E2A;
    
    --text-primary: #E8E8F0;
    --text-secondary: #C8C8D8;
    --text-tertiary: #A8A8B8;
    --text-light: #9090A8;
    --text-muted: #787890;
    
    --border-color: #2A2A3A;
    --border-light: #222230;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.4);
}

/* =============================================
   基础重置
   ============================================= */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    overflow-x: hidden;
}

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.8;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    max-width: 100vw;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-color);
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
}

input, textarea, select {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
    background: transparent;
}

/* =============================================
   导航栏
   ============================================= */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    align-items: center;
    padding: 0 var(--spacing-lg);
    gap: var(--spacing-md);
    transition: background var(--transition-normal);
}

/* 导航栏渐变模式 */
.navbar.navbar-gradient {
    background: var(--gradient-navbar);
    border-bottom: none;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

.navbar-gradient .navbar-brand {
    color: white;
}

.navbar-gradient .navbar-brand .logo {
    background: rgba(255, 255, 255, 0.2);
    box-shadow: 0 2px 8px rgba(255, 255, 255, 0.2);
}

.navbar-gradient .navbar-menu a {
    color: rgba(255, 255, 255, 0.85);
}

.navbar-gradient .navbar-menu a:hover {
    color: white;
    background: rgba(255, 255, 255, 0.15);
}

.navbar-gradient .navbar-menu a.active {
    color: white;
    background: rgba(255, 255, 255, 0.2);
}

.navbar-gradient .search-box input {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.2);
    color: white;
}

.navbar-gradient .search-box input::placeholder {
    color: rgba(255, 255, 255, 0.6);
}

.navbar-gradient .search-box button {
    color: rgba(255, 255, 255, 0.7);
}

.navbar-gradient .search-box button:hover {
    color: white;
}

.navbar-gradient .theme-toggle {
    color: rgba(255, 255, 255, 0.85);
}

.navbar-gradient .theme-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.navbar-gradient .user-avatar-wrapper {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 24px;
}

.navbar-gradient .user-avatar-wrapper:hover {
    background: rgba(255, 255, 255, 0.2);
}

.navbar-gradient .user-avatar-wrapper .user-name {
    color: white;
}

.navbar-gradient .user-avatar-wrapper .dropdown-arrow {
    color: rgba(255, 255, 255, 0.7);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--primary-color);
    flex-shrink: 0;
    text-decoration: none;
}

.navbar-brand .logo {
    width: 34px;
    height: 34px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    box-shadow: 0 2px 8px rgba(155, 126, 217, 0.3);
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 2px;
    margin-left: var(--spacing-md);
}

.navbar-menu a {
    position: relative;
    padding: 8px 14px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: 8px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.navbar-menu a:hover {
    color: var(--primary-color);
    background: var(--primary-bg);
}

.navbar-menu a.active {
    color: var(--primary-color);
    font-weight: 500;
    background: var(--primary-bg);
}

.navbar-search {
    flex: 1;
    max-width: 320px;
    min-width: 200px;
    margin: 0 var(--spacing-md);
}

.search-box {
    position: relative;
    width: 100%;
}

.search-box input {
    width: 100%;
    height: 36px;
    padding: 0 36px 0 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 18px;
    color: var(--text-primary);
    font-size: 0.85rem;
    transition: all var(--transition-fast);
}

.search-box input:focus {
    border-color: var(--primary-color);
    background: var(--bg-primary);
    box-shadow: 0 0 0 3px var(--primary-bg);
}

.search-box input::placeholder {
    color: var(--text-muted);
}

.search-box button {
    position: absolute;
    right: var(--spacing-sm);
    top: 50%;
    transform: translateY(-50%);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
}

.search-box button:hover {
    color: var(--primary-color);
}

.navbar-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-left: auto;
    flex-shrink: 0;
}

/* 主题切换按钮 */
.theme-toggle {
    width: 34px;
    height: 34px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    color: var(--text-secondary);
    transition: all var(--transition-fast);
    background: transparent;
    border: none;
    cursor: pointer;
}

.theme-toggle:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    overflow: hidden;
    border: 2px solid var(--border-color);
    transition: all var(--transition-fast);
    display: block;
    background: var(--bg-tertiary);
    cursor: pointer;
}

.user-avatar:hover {
    border-color: var(--primary-color);
    transform: scale(1.05);
}

.user-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    border-radius: 50%;
    display: block;
}

/* 用户头像下拉菜单 */
.user-avatar-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    padding: 4px 8px 4px 4px;
    border-radius: 24px;
    transition: background var(--transition-fast);
}

.user-avatar-wrapper:hover {
    background: var(--bg-secondary);
}

.user-avatar-wrapper .user-name {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    max-width: 80px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.user-avatar-wrapper .dropdown-arrow {
    color: var(--text-muted);
    transition: transform var(--transition-fast);
}

.user-avatar-wrapper:hover .dropdown-arrow {
    color: var(--text-secondary);
}

.user-dropdown-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    min-width: 200px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.15);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px) scale(0.95);
    transition: all 0.2s ease;
    z-index: 1001;
    overflow: hidden;
    padding: var(--spacing-xs);
}

.user-dropdown-menu.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    color: var(--text-secondary);
    font-size: 0.9rem;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.dropdown-item:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.dropdown-item .dropdown-icon {
    flex-shrink: 0;
    color: var(--text-muted);
    transition: color var(--transition-fast);
}

.dropdown-item:hover .dropdown-icon {
    color: var(--primary-color);
}

.dropdown-item.danger:hover {
    background: rgba(255, 107, 107, 0.1);
    color: var(--danger-color);
}

.dropdown-item.danger:hover .dropdown-icon {
    color: var(--danger-color);
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: var(--spacing-xs) 0;
}

.dropdown-header {
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.dropdown-notice {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.dropdown-notice .notice-date {
    font-size: 0.7rem;
}

/* =============================================
   按钮样式
   ============================================= */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-button, linear-gradient(135deg, var(--primary-color), var(--primary-light)));
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(155, 126, 217, 0.3);
    color: white;
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.btn-sm {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.8rem;
}

.btn-lg {
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1rem;
}

/* =============================================
   卡片组件
   ============================================= */
.card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

/* 卡片渐变背景 */
.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    background: var(--gradient-card, linear-gradient(180deg, rgba(155, 126, 217, 0.08) 0%, transparent 100%));
    pointer-events: none;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.card:hover::before {
    opacity: 1;
}

.card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--primary-light);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-title::before {
    content: '';
    width: 3px;
    height: 16px;
    background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
    border-radius: 2px;
}

.card-body {
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--border-color);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* =============================================
   图书卡片
   ============================================= */
.book-card {
    background: var(--bg-card);
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    transition: all var(--transition-normal);
    cursor: pointer;
}

.book-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.book-cover {
    position: relative;
    width: 100%;
    padding-top: 140%;
    background: var(--bg-tertiary);
    overflow: hidden;
}

.book-cover img {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.book-card:hover .book-cover img {
    transform: scale(1.05);
}

.book-tag {
    position: absolute;
    top: var(--spacing-sm);
    left: var(--spacing-sm);
    padding: 2px 8px;
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: var(--radius-xs);
    color: white;
}

.book-tag.vip {
    background: linear-gradient(135deg, #FFD700, #FFA500);
}

.book-tag.complete {
    background: linear-gradient(135deg, var(--success-color), #3DB9AA);
}

.book-tag.hot {
    background: linear-gradient(135deg, var(--danger-color), #FF8E8E);
}

.book-tag.new {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
}

.book-info {
    padding: var(--spacing-md);
}

.book-title {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-author {
    font-size: 0.8rem;
    color: var(--text-tertiary);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.book-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* =============================================
   分页组件
   ============================================= */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xl) 0;
}

.pagination-item {
    min-width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.pagination-item:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination-item.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: white;
}

.pagination-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* =============================================
   标签组件
   ============================================= */
.tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.8rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    cursor: pointer;
}

.tag:hover {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.tag.active {
    background: var(--primary-color);
    color: white;
}

.tag-primary {
    background: var(--primary-bg);
    color: var(--primary-color);
}

/* =============================================
   空状态
   ============================================= */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-2xl);
    text-align: center;
}

.empty-state .icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-lg);
    opacity: 0.5;
}

.empty-state h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.empty-state p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* =============================================
   加载状态
   ============================================= */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =============================================
   消息提示
   ============================================= */
.message-toast {
    position: fixed;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--bg-card);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    font-size: 0.9rem;
    z-index: 9999;
    animation: slideDown 0.3s ease;
}

.message-toast.success {
    background: var(--success-color);
    color: white;
}

.message-toast.error {
    background: var(--danger-color);
    color: white;
}

.message-toast.warning {
    background: var(--warning-color);
    color: #333;
}

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

/* =============================================
   页脚 - 统一4列布局
   ============================================= */
.footer {
    background: var(--footer-bg, #1A1A2E);
    padding: var(--spacing-2xl) var(--spacing-lg) var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
    padding-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h4 {
    color: var(--footer-text, #E8E8F0);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.footer-section h4 svg {
    width: 18px;
    height: 18px;
    color: var(--primary-color);
}

.footer-section p {
    color: var(--footer-text-secondary, #B8B8C8);
    font-size: 0.85rem;
    line-height: 1.8;
}

.footer-section a {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--footer-text-secondary, #B8B8C8);
    font-size: 0.85rem;
    padding: var(--spacing-xs) 0;
    transition: all var(--transition-fast);
}

.footer-section a svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

.footer-section a:hover {
    color: var(--footer-link, #D4A5A5);
    transform: translateX(4px);
}

.footer-section a:hover svg {
    opacity: 1;
}

/* 社交媒体图标 */
.footer-social {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.footer-social a {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--footer-text-secondary, #B8B8C8);
    transition: all var(--transition-fast);
}

.footer-social a:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.footer-social a svg {
    width: 18px;
    height: 18px;
    opacity: 1;
}

/* 页脚底部 */
.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding-top: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.footer-copyright {
    color: var(--footer-text-secondary, #B8B8C8);
    font-size: 0.8rem;
}

.footer-icp {
    color: var(--footer-text-secondary, #B8B8C8);
    font-size: 0.75rem;
    opacity: 0.7;
}

.footer-icp a {
    color: var(--footer-text-secondary, #B8B8C8);
    transition: color var(--transition-fast);
}

.footer-icp a:hover {
    color: var(--footer-link, #D4A5A5);
}

/* 页脚响应式 */
@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-lg);
    }
}

@media (max-width: 480px) {
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-section a {
        justify-content: center;
    }
    
    .footer-section a:hover {
        transform: none;
    }
    
    .footer-social {
        justify-content: center;
    }
}

/* =============================================
   响应式设计
   ============================================= */
@media (max-width: 1024px) {
    .navbar-menu {
        display: none;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu-btn {
        display: flex;
        align-items: center;
        justify-content: center;
        width: 36px;
        height: 36px;
        background: transparent;
        border: none;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        cursor: pointer;
        transition: all var(--transition-fast);
    }
    
    .mobile-menu-btn:hover {
        background: var(--bg-secondary);
        color: var(--primary-color);
    }
    
    /* 移动端侧边导航 */
    .mobile-nav-overlay {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 999;
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-normal);
    }
    
    .mobile-nav-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-nav {
        position: fixed;
        top: 0;
        left: -280px;
        width: 280px;
        height: 100vh;
        background: var(--bg-primary);
        box-shadow: var(--shadow-xl);
        z-index: 1000;
        transition: left var(--transition-normal);
        overflow-y: auto;
    }
    
    .mobile-nav.active {
        left: 0;
    }
    
    .mobile-nav-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--border-color);
    }
    
    .mobile-nav-brand {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        font-size: 1.1rem;
        font-weight: 600;
        color: var(--primary-color);
    }
    
    .mobile-nav-close {
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: var(--bg-secondary);
        border: none;
        border-radius: var(--radius-sm);
        color: var(--text-secondary);
        cursor: pointer;
        transition: all var(--transition-fast);
    }
    
    .mobile-nav-close:hover {
        background: var(--primary-bg);
        color: var(--primary-color);
    }
    
    .mobile-nav-menu {
        padding: var(--spacing-sm);
    }
    
    .mobile-nav-menu a {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        padding: var(--spacing-md);
        color: var(--text-secondary);
        font-size: 0.95rem;
        border-radius: var(--radius-md);
        transition: all var(--transition-fast);
    }
    
    .mobile-nav-menu a:hover {
        background: var(--bg-secondary);
        color: var(--primary-color);
    }
    
    .mobile-nav-menu a.active {
        background: var(--primary-bg);
        color: var(--primary-color);
        font-weight: 500;
    }
    
    .mobile-nav-menu a svg {
        width: 20px;
        height: 20px;
    }
}
    .navbar-search {
        max-width: 280px;
    }
    
    /* 移动端菜单按钮 */
    .mobile-menu-btn {
        display: flex;
    }
}

@media (max-width: 768px) {
    html {
        font-size: 13px;
    }
    
    .navbar {
        height: var(--navbar-height-mobile);
        padding: 0 var(--spacing-sm);
    }
    
    /* 移动端导航栏显示"烟の书库"，但字号缩小 */
    .navbar-brand span:last-child {
        display: inline;
        font-size: 0.95rem;
    }
    
    .navbar-brand .logo {
        width: 28px;
        height: 28px;
        font-size: 0.9rem;
    }
    
    /* 隐藏顶部搜索框 */
    .navbar-search {
        display: none;
    }
    
    /* 隐藏菜单按钮 */
    .mobile-menu-btn {
        display: none;
    }
    
    /* 隐藏顶部导航菜单 */
    .navbar-menu {
        display: none;
    }
    
    /* 移动端底部导航 */
    .mobile-nav {
        display: flex;
    }
    
    /* 页面容器适配 */
    .page-container {
        padding: calc(var(--navbar-height-mobile) + var(--spacing-xs)) 0 calc(var(--navbar-height-mobile) + var(--spacing-xs));
        position: relative;
        z-index: 1;
    }
    
    /* 按钮适配 */
    .btn {
        padding: var(--spacing-sm) var(--spacing-md);
    }
    
    .btn-lg {
        padding: var(--spacing-md);
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .navbar-actions .btn span {
        display: none;
    }
    
    .navbar-actions {
        gap: var(--spacing-xs);
    }
    
    /* 更小的触摸目标 */
    .theme-toggle {
        width: 36px;
        height: 36px;
    }
    
    .user-avatar {
        width: 32px;
        height: 32px;
    }
}

/* =============================================
   移动端底部导航
   ============================================= */
.mobile-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: var(--navbar-height-mobile);
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    z-index: 1000;
    padding-bottom: env(safe-area-inset-bottom);
}

.mobile-nav-items {
    display: flex;
    align-items: center;
    justify-content: space-around;
    height: 100%;
    max-width: 500px;
    margin: 0 auto;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: var(--spacing-sm);
    color: var(--text-muted);
    font-size: 0.7rem;
    transition: color var(--transition-fast);
    min-width: 60px;
}

.mobile-nav-item:hover,
.mobile-nav-item.active {
    color: var(--primary-color);
}

.mobile-nav-item .icon {
    font-size: 1.3rem;
}

/* 移动端菜单按钮 */
.mobile-menu-btn {
    display: none;
    width: 38px;
    height: 38px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    transition: all var(--transition-fast);
}

.mobile-menu-btn:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

/* 移动端侧边菜单 */
.mobile-drawer {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    display: none;
}

.mobile-drawer.show {
    display: block;
}

.mobile-drawer-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.mobile-drawer-content {
    position: absolute;
    top: 0;
    right: 0;
    width: 280px;
    height: 100%;
    background: var(--bg-primary);
    box-shadow: var(--shadow-lg);
    animation: slideInRight 0.3s ease;
    overflow-y: auto;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInRight {
    from { transform: translateX(100%); }
    to { transform: translateX(0); }
}

.mobile-drawer-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--border-color);
}

.mobile-drawer-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.mobile-drawer-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    transition: all var(--transition-fast);
}

.mobile-drawer-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.mobile-drawer-menu {
    padding: var(--spacing-md);
}

.mobile-drawer-menu a {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.mobile-drawer-menu a:hover {
    background: var(--bg-secondary);
    color: var(--primary-color);
}

.mobile-drawer-menu a.active {
    background: var(--primary-bg);
    color: var(--primary-color);
}

.mobile-drawer-menu .icon {
    font-size: 1.2rem;
    width: 24px;
    text-align: center;
}

/* 移动端搜索栏 */
.mobile-search-bar {
    display: none;
    position: fixed;
    top: var(--navbar-height-mobile);
    left: 0;
    right: 0;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    z-index: 999;
}

.mobile-search-bar .search-box {
    width: 100%;
}

@media (max-width: 768px) {
    .mobile-search-bar {
        display: block;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
}

/* =============================================
   移动端适配增强
   ============================================= */
@media (max-width: 768px) {
    /* 表单元素适配 */
    .form-input,
    .form-select {
        height: 44px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    /* 分页适配 */
    .pagination {
        flex-wrap: wrap;
        gap: var(--spacing-xs);
    }
    
    .pagination-item {
        min-width: 32px;
        height: 32px;
        font-size: 0.85rem;
    }
    
    /* 卡片适配 */
    .card-body {
        padding: var(--spacing-md);
    }
    
    /* 页脚适配 */
    .footer-links {
        flex-wrap: wrap;
        gap: var(--spacing-md);
    }
    
    /* 消息提示适配 */
    .message-toast {
        width: calc(100% - 32px);
        text-align: center;
    }
}

/* 触摸设备优化 */
@media (hover: none) and (pointer: coarse) {
    /* 增大触摸目标 */
    .btn {
        min-height: 44px;
    }
    
    .filter-option,
    .tag {
        min-height: 36px;
        padding: 8px 16px;
    }
    
    /* 移除hover效果 */
    .book-card:hover {
        transform: none;
    }
    
    .book-card:active {
        transform: scale(0.98);
    }
}

/* 深色模式下的移动端适配 */
[data-theme="dark"] .mobile-nav {
    background: var(--bg-primary);
}

[data-theme="dark"] .mobile-drawer-content {
    background: var(--bg-primary);
}

/* =============================================
   工具类
   ============================================= */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }

.font-bold { font-weight: 600; }
.font-medium { font-weight: 500; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden { display: none !important; }
.visible { display: block !important; }

.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }

/* =============================================
   全局滚动条美化
   ============================================= */

/* Webkit 浏览器滚动条样式 (Chrome, Safari, Edge) */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-color), var(--primary-light));
    border-radius: 4px;
    transition: background var(--transition-fast);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, var(--primary-dark), var(--primary-color));
}

/* 滚动条角落 */
::-webkit-scrollbar-corner {
    background: var(--bg-secondary);
}

/* Firefox 滚动条样式 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-secondary);
}

/* 文本域滚动条 */
.form-textarea::-webkit-scrollbar {
    width: 6px;
}

.form-textarea::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 3px;
}

.form-textarea::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* 下拉框滚动条 */
select::-webkit-scrollbar {
    width: 6px;
}

select::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: 3px;
}

select::-webkit-scrollbar-thumb {
    background: var(--primary-light);
    border-radius: 3px;
}

/* 深色主题滚动条 */
[data-theme="dark"] ::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
}

[data-theme="dark"] ::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-light), var(--primary-color));
}

[data-theme="dark"] * {
    scrollbar-color: var(--primary-light) var(--bg-tertiary);
}