/* ============================================
   模块系统 - 全局样式表
   架构：Settings → Generic → Elements → Components → Pages → Utilities
   ============================================ */

/* ============ 1. SETTINGS - CSS 变量 ============ */
:root {
    /* 主色调 */
    --color-primary: #3b82f6;
    --color-primary-hover: #2563eb;
    --color-primary-light: #eff6ff;
    --color-primary-dark: #1d4ed8;
    --color-primary-rgb: 59, 130, 246;
    
    /* 功能色 */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-danger: #ef4444;
    --color-danger-light: #fee2e2;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-info: #0ea5e9;
    
    /* 文字色 */
    --color-text: #1e293b;
    --color-text-secondary: #475569;
    --color-text-tertiary: #64748b;
    --color-text-light: #94a3b8;
    --color-text-on-primary: #ffffff;
    
    /* 背景色 */
    --color-bg: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-overlay: rgba(0, 0, 0, 0.5);
    
    /* 边框色 */
    --color-border: #e2e8f0;
    --color-border-dark: #cbd5e1;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 4px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 6px 12px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 10px 20px -5px rgba(0, 0, 0, 0.1);
    --shadow-card: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-card-hover: 0 12px 24px rgba(0, 0, 0, 0.12);
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    --radius-2xl: 16px;
    --radius-full: 9999px;
    
    /* 间距 */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 12px;
    --space-lg: 16px;
    --space-xl: 20px;
    --space-2xl: 24px;
    --space-3xl: 32px;
    --space-4xl: 40px;
    
    /* 布局尺寸 */
    --sidebar-width: 450px;
    --header-height: 72px;
    --mobile-header-height: 56px;
}

/* ============ 2. GENERIC - 重置与基础 ============ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Inter', sans-serif;
    color: var(--color-text);
    background: var(--color-bg-secondary);
    line-height: 1.5;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: var(--color-primary);
    text-decoration: none;
}

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

/* ============ 3. ELEMENTS - 基础元素 ============ */
/* 滚动条 - Webkit */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
}

::-webkit-scrollbar-thumb {
    background: var(--color-border-dark);
    border-radius: var(--radius-md);
    border: 2px solid var(--color-bg-tertiary);
    min-height: 40px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-light);
}

::-webkit-scrollbar-corner {
    background: var(--color-bg-tertiary);
}

/* Firefox 滚动条 */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-border-dark) var(--color-bg-tertiary);
}

/* ============ 4. COMPONENTS - 组件系统 ============ */

/* ---- App 布局 ---- */
.app {
    display: flex;
    height: 100vh;
    min-width: 0;
}

/* ---- 侧边栏 ---- */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    box-shadow: 2px 0 20px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.sidebar__brand {
    padding: var(--space-lg) var(--space-xl);
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-on-primary);
    position: relative;
    overflow: hidden;
    min-height: 88px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.brand {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    color: inherit;
}

/* 修复：Logo 悬停不变色 */
.brand:hover,
.brand:hover .brand__text h1,
.brand:hover .brand__text p {
    color: inherit;
    opacity: 1;
}

.brand__icon {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    backdrop-filter: blur(4px);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.brand__icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.brand__text h1 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: var(--space-xs);
    letter-spacing: -0.025em;
}

.brand__text p {
    font-size: 13px;
    opacity: 0.9;
    font-weight: 400;
}

/* 修复：关闭按钮默认隐藏，只在移动端显示 */
.sidebar__close {
    display: none;
    width: 32px;
    height: 32px;
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: none;
    border-radius: 50%;
    font-size: 16px;
    cursor: pointer;
    backdrop-filter: blur(4px);
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

/* 侧边栏搜索区 */
.sidebar__search {
    padding: var(--space-md) var(--space-xl);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.sidebar__search-wrapper {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.sidebar__search-wrapper .search {
    flex: 1;
    position: relative;
}

.sidebar__search-wrapper .search__input {
    width: 100%;
    padding: var(--space-sm) var(--space-md) var(--space-sm) calc(var(--space-md) + 20px);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    font-family: inherit;
}

.sidebar__search-wrapper .search__input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.sidebar__search-wrapper .search__icon {
    position: absolute;
    left: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    pointer-events: none;
    font-size: 14px;
}

.sidebar__collapse-btn {
    width: 36px;
    height: 36px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.sidebar__collapse-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.sidebar__collapse-btn:active {
    transform: scale(0.95);
}

.sidebar__collapse-icon {
    font-size: 14px;
    display: block;
    transform: rotate(-90deg);
}

.sidebar__content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg) 0;
    scrollbar-width: thin;
}

.sidebar__content::-webkit-scrollbar {
    width: 6px;
}

.sidebar__content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-sm);
}

/* 全部模块按钮 */
.categories__all {
    padding: 0 var(--space-xl);
    margin-bottom: var(--space-lg);
}

.btn-category {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    width: 100%;
    text-align: left;
    cursor: pointer;
    color: var(--color-text);
}

.btn-category:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-category.active {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-color: var(--color-primary);
    color: var(--color-text-on-primary);
    box-shadow: 0 6px 16px rgba(var(--color-primary-rgb), 0.25);
}

.btn-category__icon {
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.btn-category__text {
    flex: 1;
    font-size: 14px;
    font-weight: 600;
}

.btn-category__count {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 700;
    flex-shrink: 0;
}

.btn-category.active .btn-category__count {
    background: var(--color-text-on-primary);
    color: var(--color-primary);
}

/* 分类树 */
.tree {
    padding: 0 var(--space-xl);
}

.tree__item-link {
    display: flex;
    align-items: center;
    padding: var(--space-sm);
    margin-bottom: var(--space-xs);
    border-radius: var(--radius-md);
    cursor: pointer;
    min-height: 40px;
    color: var(--color-text);
    border: 1px solid transparent;
    transition: all 0.2s ease;
}

.tree__item-link:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-border);
}

.tree__item-link.active {
    background: linear-gradient(90deg, var(--color-primary-light) 0%, rgba(var(--color-primary-rgb), 0.1) 100%);
    border-left: 3px solid var(--color-primary);
    color: var(--color-primary);
    font-weight: 600;
}

.tree__item-link.active:hover {
    background: linear-gradient(90deg, rgba(var(--color-primary-rgb), 0.2) 0%, rgba(var(--color-primary-rgb), 0.15) 100%);
}

.tree__item-content {
    display: flex;
    align-items: center;
    width: 100%;
}

.tree__indent {
    width: 2px;
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.indent {
    width: 8px;
    height: 1px;
    margin: 0 4px;
    background: var(--color-border);
}

.tree__toggle {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--color-text-tertiary);
    background: none;
    border: none;
    flex-shrink: 0;
    margin-right: var(--space-xs);
    padding: 0;
    border-radius: var(--radius-sm);
}

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

.tree__toggle.expanded .tree__toggle-icon {
    transform: rotate(90deg);
}

.tree__toggle-icon {
    font-size: 10px;
    transition: transform 0.2s ease;
}

.tree__toggle-placeholder {
    width: 20px;
    height: 20px;
    margin-right: var(--space-xs);
    flex-shrink: 0;
    visibility: hidden;
}

.tree__icon {
    width: 20px;
    text-align: center;
    color: var(--color-text-tertiary);
    margin-right: var(--space-sm);
    font-size: 16px;
    flex-shrink: 0;
}

.tree__item-link.active .tree__icon {
    color: var(--color-primary);
}

.tree__name {
    flex: 1;
    font-size: 14px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    font-weight: 500;
}

.tree__item-link.active .tree__name {
    color: var(--color-primary);
    font-weight: 600;
}

.tree__count {
    background: var(--color-bg-tertiary);
    color: var(--color-text-tertiary);
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 11px;
    font-weight: 600;
    flex-shrink: 0;
    margin-left: var(--space-sm);
}

.tree__item-link.active .tree__count,
.tree__item-link.parent-active .tree__count {
    background: var(--color-primary);
    color: var(--color-text-on-primary);
}

.tree__children {
    margin-left: 52px;
    overflow: hidden;
    border-left: 1px solid var(--color-border);
    padding-left: var(--space-md);
}

/* 侧边栏遮罩 */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-overlay);
    z-index: 99;
    display: none;
}

/* ---- 主内容区 ---- */
.main {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    background: var(--color-bg-secondary);
    height: 100vh;
}

/* 头部 */
.header {
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-shrink: 0;
    height: var(--header-height);
    box-shadow: var(--shadow-sm);
    gap: var(--space-xl);
}

.header__left {
    flex: 0 0 auto;
    min-width: 420px;
    max-width: 420px;
}

.header__title {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.header__title-main {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    margin: 0;
    line-height: 1.3;
    white-space: normal;
}

.header__title-sub {
    color: var(--color-text-tertiary);
    font-size: 13px;
    margin: 0;
}

.header__right {
    flex: 1;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--space-lg);
    min-width: 0;
}

.header__actions {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    min-width: 0;
    overflow: hidden;
}

/* 视图切换 */
.view-switcher {
    flex: 0 0 auto;
}

.view-switcher__buttons {
    display: flex;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: 4px;
    border: 1px solid var(--color-border);
    gap: 4px;
}

.view-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-tertiary);
    cursor: pointer;
    white-space: nowrap;
    min-width: 80px;
    justify-content: center;
}

.view-btn:hover {
    color: var(--color-text-secondary);
    background: var(--color-bg);
}

.view-btn.active {
    background: var(--color-bg);
    color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}

.view-btn__icon {
    font-size: 16px;
}

/* 用户信息 */
.user {
    position: relative;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-lg);
    cursor: pointer;
    background: var(--color-bg-tertiary);
    border: 1px solid transparent;
    min-width: 140px;
    flex-shrink: 0;
}

.user:hover {
    background: var(--color-bg);
    border-color: var(--color-border);
}

.user__avatar {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-on-primary);
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.user__name {
    font-weight: 600;
    font-size: 14px;
    color: var(--color-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

.user__dropdown {
    font-size: 12px;
    color: var(--color-text-tertiary);
    flex-shrink: 0;
    cursor: pointer;
}

.user__menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--color-border);
    min-width: 160px;
    z-index: 1001;
    overflow: hidden;
    margin-top: var(--space-sm);
}

.user__menu-item {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    color: var(--color-text-secondary);
    font-size: 14px;
    white-space: nowrap;
    cursor: pointer;
    background: var(--color-bg);
}

.user__menu-item:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.user__menu-item.logout:hover {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.user__menu-icon {
    width: 16px;
    text-align: center;
    font-size: 16px;
    flex-shrink: 0;
}

/* 移动端头部 */
.mobile-header {
    display: none;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 90;
    box-shadow: var(--shadow-md);
    height: var(--mobile-header-height);
}

.mobile-header__inner {
    display: grid;
    grid-template-columns: 56px 1fr 56px 56px;
    align-items: center;
    height: 100%;
    padding: 0;
    gap: 0;
}

.mobile-header__nav {
    width: 56px;
    height: 56px;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0;
    margin: 0;
}

.hamburger {
    width: 24px;
    height: 18px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    align-items: center;
}

.hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: var(--color-text);
    border-radius: 1px;
}

.mobile-header__title {
    grid-column: 2 / span 2;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    padding: 0 var(--space-sm);
}

.mobile-header__title-text {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    white-space: normal;
    overflow: hidden;
    text-overflow: ellipsis;
    margin: 0;
    line-height: 1.2;
    text-align: center;
    width: 100%;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.mobile-header__actions {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0;
    height: 100%;
}

.mobile-header__action {
    width: 56px;
    height: 56px;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    padding: 0;
    margin: 0;
}

/* 移动端搜索框 */
.mobile-search {
    display: none;
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
}

.search.mobile {
    position: relative;
    width: 100%;
}

.search.mobile .search__input {
    width: 100%;
    padding: var(--space-md) calc(var(--space-xl) * 2) var(--space-md) var(--space-xl);
}

.search__close {
    position: absolute;
    right: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text-tertiary);
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.search__close:hover {
    color: var(--color-text);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

/* ---- 按钮系统 ---- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    text-decoration: none;
    white-space: nowrap;
    overflow: hidden;
    font-family: inherit;
    position: relative;
}

.btn:hover {
    box-shadow: var(--shadow-md);
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-on-primary);
}

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

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

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

.btn-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border-color: var(--color-danger-light);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: var(--color-text-on-primary);
}

.btn-sm {
    padding: var(--space-sm) var(--space-md);
    font-size: 13px;
}

.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn__icon {
    font-size: 16px;
    display: inline-block;
    line-height: 1;
}

/* 批量操作栏 */
.batch-actions {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    padding: var(--space-sm) var(--space-lg);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    margin: 0;
    flex-shrink: 0;
    height: 52px;
    box-shadow: var(--shadow-sm);
}

.batch-actions__info {
    flex: 1;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.batch-actions__icon {
    font-size: 16px;
}

.batch-actions__check {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

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

/* 排序提示条 */
.sort-notice {
    position: sticky;
    top: var(--header-height);
    z-index: 80;
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    padding: 12px 24px;
    box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.3);
}

.sort-notice__content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    font-size: 14px;
    font-weight: 500;
}

.sort-notice__icon {
    font-size: 16px;
}

.sort-hint {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary-light);
    border-radius: 6px;
    color: var(--color-primary-dark);
    font-size: 13px;
    font-weight: 500;
    white-space: nowrap;
}

.sort-hint__icon {
    font-size: 14px;
}

.sort-hint__text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* ---- 内容区域 ---- */
.content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
    scrollbar-width: thin;
}

.content::-webkit-scrollbar {
    width: 8px;
}

.content::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-md);
}

/* 欢迎区域 */
.welcome {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-lg);
    margin: var(--space-md) var(--space-md) var(--space-xl);
    box-shadow: var(--shadow-md);
}

.welcome-mobile {
    display: none;
    padding: var(--space-md);
    text-align: center;
}

.welcome__icon {
    font-size: 1.25rem;
    margin-bottom: var(--space-sm);
}

.welcome__title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.welcome__desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--space-md);
}

.welcome-desktop {
    display: block;
}

.welcome__hero {
    background: linear-gradient(135deg, var(--color-primary-light) 0%, rgba(var(--color-primary-rgb), 0.05) 100%);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    text-align: center;
    margin-bottom: var(--space-lg);
}

.welcome__badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    padding: var(--space-sm) var(--space-lg);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: var(--space-lg);
}

.welcome__badge-icon {
    font-size: 1rem;
}

.welcome__heading {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-md);
    line-height: 1.3;
}

.welcome__subheading {
    color: var(--color-text-secondary);
    font-size: 1rem;
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.welcome__subheading .highlight {
    color: var(--color-primary);
}

.welcome__actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
}

.features {
    margin-bottom: var(--space-lg);
}

.features__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--space-lg);
}

.feature {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.feature:hover {
    border-color: var(--color-primary-light);
}

.feature__icon {
    font-size: 1.5rem;
    margin-bottom: var(--space-md);
}

.feature__title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.feature__desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
}

.welcome__footer {
    text-align: center;
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    color: var(--color-text-tertiary);
    font-size: 0.9rem;
}

/* 空状态 */
.empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-3xl) var(--space-xl);
    text-align: center;
    color: var(--color-text-tertiary);
    min-height: 400px;
}

.empty__icon {
    font-size: 64px;
    color: var(--color-border);
    margin-bottom: var(--space-lg);
    opacity: 0.5;
}

.empty__title {
    font-size: 18px;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    font-weight: 600;
}

.empty__desc {
    font-size: 14px;
    margin-bottom: var(--space-lg);
    max-width: 400px;
    line-height: 1.6;
}

/* ---- 视图系统 ---- */
.view {
    width: 100%;
}

.view-mobile {
    display: block;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--space-3xl);
    max-width: none;
    margin: 0;
}

.view-desktop {
    display: none;
}

.desktop-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.view-both {
    display: none;
}

.both-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

/* ---- 卡片系统 ---- */
.card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

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

.card.selected {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1), var(--shadow-lg);
}

/* 网格卡片 */
.card-grid {
    display: flex;
    flex-direction: column;
    cursor: pointer;
    height: fit-content;
}

.card__preview {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-xl) var(--radius-xl) 0 0;
    background: white;
    min-height: 200px;
    flex: 1;
}

.card__preview .preview {
    width: 100%;
    height: auto;
    min-height: 330px;
    max-height: 330px;
    border: none;
    display: block;
}

.card__actions {
    padding: var(--space-md);
    background: linear-gradient(to top, var(--color-bg) 80%, transparent);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    margin-top: auto;
}

.card-grid:hover .card__actions {
    opacity: 1;
    background: var(--color-bg);
}

/* 桌面端卡片 */
.card-desktop {
    margin-bottom: var(--space-lg);
}

.card-desktop .card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.card-desktop .card__info {
    flex: 1;
}

.card-desktop .card__details {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.card-desktop .card__title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.card-desktop .card__title h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
}

.card__category {
    background: var(--color-primary-light);
    color: var(--color-primary);
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.card__meta {
    display: flex;
    gap: var(--space-lg);
}

.card__meta-item {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--color-text-tertiary);
    font-size: 13px;
}

.meta__icon {
    font-size: 14px;
}

.card-desktop .card__actions {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.card__checkbox {
    margin-right: var(--space-md);
}

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

.card__preview-area {
    padding: var(--space-lg);
}

/* 双端卡片 */
.card-both .card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-secondary);
}

.card-both .card__preview-area {
    padding: var(--space-lg);
}

.preview-row {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-xl);
    min-height: 400px;
}

/* 预览盒子 */
.preview-box {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.preview-box__header {
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-shrink: 0;
    height: 48px;
}

.preview-box__title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    color: var(--color-text);
    font-size: 14px;
}

.preview-box__icon {
    font-size: 16px;
}

.preview-box__actions {
    display: flex;
    gap: var(--space-sm);
}

.preview-box__content {
    flex: 1;
    overflow: auto;
    position: relative;
    background: white;
    min-height: 300px;
}

.preview-box__content .preview {
    width: 100%;
    height: auto;
    border: none;
    display: block;
    min-height: 300px;
}

/* 移动端预览框 */
.preview-box-mobile .preview-box__content {
    padding: var(--space-lg);
    background: var(--color-bg-tertiary);
}

.mobile-frame {
    width: 100%;
    height: auto;
    max-width: 360px;
    margin: 0 auto;
    border-radius: 24px;
    overflow: hidden;
    border: 12px solid #1e293b;
    background: white;
    position: relative;
    box-shadow: var(--shadow-lg);
    min-height: 400px;
}

.mobile-frame__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 20px;
    background: #1e293b;
    border-radius: 0 0 12px 12px;
    z-index: 10;
}

.mobile-frame__content {
    height: 100%;
    overflow: auto;
    background: white;
}

/* 加载更多 */
.load-more {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
}

.btn-load {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-2xl);
    background: var(--color-bg);
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-lg);
    color: var(--color-primary);
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
}

.btn-load:hover {
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    box-shadow: var(--shadow-md);
}

.load-end {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--space-3xl) var(--space-xl);
    color: var(--color-text-tertiary);
    font-size: 14px;
}

.load-end__icon {
    font-size: 24px;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
    display: inline-block;
}

/* ---- 弹窗系统 ---- */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-bg-overlay);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
}

.modal__overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.modal__dialog {
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 800px;
    max-height: 85vh;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    border: 1px solid var(--color-border);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    z-index: 10000;
}

.modal__header {
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 60px;
}

.modal__title {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
}

.modal__subtitle {
    font-family: monospace;
    font-size: 12px;
    color: var(--color-text-tertiary);
    background: var(--color-bg-tertiary);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
}

.modal__header-title {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.modal__close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--color-text-tertiary);
    cursor: pointer;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal__close:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

.modal__body {
    padding: var(--space-xl);
    overflow-y: auto;
    max-height: 60vh;
    scrollbar-width: thin;
}

.modal__body::-webkit-scrollbar {
    width: 6px;
}

.modal__body::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-sm);
}

.modal__footer {
    padding: var(--space-lg) var(--space-xl);
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-sm);
    height: 68px;
}

/* 表单样式 */
.modal__form {
    display: flex;
    flex-direction: column;
    height: 100%;
}

.form-group {
    margin-bottom: var(--space-xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 14px;
}

.form-input,
.form-select {
    width: 100%;
    padding: var(--space-md) var(--space-lg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: inherit;
}

.form-input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
    background: var(--color-primary-light);
}

.form-hint {
    color: var(--color-text-tertiary);
    font-size: 12px;
    margin-top: var(--space-xs);
}

/* 代码编辑器 */
.code-editor {
    border: 2px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.code-editor:focus-within {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.code-editor__header {
    background: #1e293b;
    color: var(--color-text-on-primary);
    padding: var(--space-md) var(--space-lg);
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 14px;
    height: 44px;
}

.code-editor__icon {
    font-size: 16px;
}

.code-editor__textarea {
    width: 100%;
    min-height: 200px;
    padding: var(--space-lg);
    border: none;
    font-family: monospace;
    font-size: 13px;
    line-height: 1.6;
    background: var(--color-bg-secondary);
    resize: vertical;
    color: var(--color-text);
}

.code-editor__textarea:focus {
    outline: none;
    background: var(--color-bg);
}

/* 描述编辑器 */
.code-description {
    margin-top: 8px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg-tertiary);
    transition: all 0.2s ease;
}

.code-description:hover {
    border-color: var(--color-border-dark);
}

.code-description__header {
    padding: 8px 12px;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    font-size: 12px;
    color: var(--color-text-tertiary);
    display: flex;
    align-items: center;
    gap: 6px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.code-description__title {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.code-description__hint {
    margin-left: auto;
    font-size: 11px;
    color: var(--color-text-light);
}

.code-description__textarea {
    width: 100%;
    padding: 10px;
    border: none;
    background: transparent;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: 13px;
    line-height: 1.5;
    resize: vertical;
    min-height: 80px;
    color: var(--color-text);
}

.code-description__textarea:focus {
    outline: none;
    background: var(--color-bg);
}

.code-description__textarea::placeholder {
    color: var(--color-text-light);
}

/* 查看器弹窗 */
#mobileViewerModal .modal__dialog,
#desktopViewerModal .modal__dialog {
    max-width: 1000px;
    max-height: 90vh;
}

.viewer {
    height: 600px;
    display: flex;
    justify-content: center;
    align-items: center;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.viewer__frame {
    background: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    position: relative;
}

.viewer__frame-desktop {
    width: 100%;
    height: 100%;
    min-height: 500px;
    max-height: 600px;
}

.viewer__frame-desktop iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.viewer__frame-mobile {
    width: 375px;
    height: 667px;
    background: white;
    border-radius: 36px;
    border: 12px solid #222;
    box-shadow: var(--shadow-xl);
}

.viewer__notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 160px;
    height: 25px;
    background: #222;
    border-bottom-left-radius: 18px;
    border-bottom-right-radius: 18px;
    z-index: 10;
}

.viewer__content {
    width: 100%;
    height: 100%;
    overflow: auto;
    padding: 20px;
    box-sizing: border-box;
}

.viewer__content iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* 分类管理弹窗 */
#categoryManagerModal .modal__dialog {
    max-width: 600px;
}

.modal__actions {
    margin-bottom: var(--space-lg);
}

.modal__hint {
    color: var(--color-text-tertiary);
    font-size: 13px;
    margin-bottom: var(--space-md);
    padding: var(--space-sm);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.category-manager {
    max-height: 400px;
    overflow-y: auto;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    background: var(--color-bg);
    margin-top: var(--space-sm);
}

/* 分类文档编辑器弹窗 */
.modal-note .modal__dialog {
    max-width: 1000px;
    max-height: 90vh;
    width: 95%;
}

.modal-note .modal__body {
    padding: 20px;
    display: flex;
    flex-direction: column;
    height: calc(90vh - 120px);
}

.note-editor__tabs {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
}

.note-editor__tab {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text-secondary);
    cursor: pointer;
}

.note-editor__tab:hover {
    background: var(--color-bg);
    color: var(--color-text);
}

.note-editor__tab.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-on-primary);
}

.note-editor__tab-icon {
    font-size: 16px;
}

.note-editor__view {
    flex: 1;
    display: none;
    flex-direction: column;
}

.note-editor__view.active {
    display: flex;
}

.editor-toolbar {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    padding: 8px;
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-bottom: 0;
}

.editor-content {
    flex: 1;
    min-height: 400px;
    padding: 15px;
    border: 1px solid var(--color-border);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    overflow-y: auto;
    background: var(--color-bg);
    line-height: 1.6;
    outline: none;
    font-size: 14px;
    color: var(--color-text);
}

.editor-code {
    flex: 1;
    min-height: 400px;
    padding: 15px;
    font-family: monospace;
    font-size: 14px;
    line-height: 1.5;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background: var(--color-bg);
    color: var(--color-text);
    resize: none;
    white-space: pre-wrap;
}

.editor-code__footer {
    margin-top: 10px;
    font-size: 12px;
    color: var(--color-text-tertiary);
    display: flex;
    justify-content: space-between;
}

.editor-code__length {
    font-size: 12px;
    font-weight: 600;
}

/* Toast提示 */
.toasts {
    position: fixed;
    top: var(--space-xl);
    right: var(--space-xl);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--color-primary);
    max-width: 400px;
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    font-size: 14px;
}

/* 返回顶部按钮 */
.back-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: var(--color-text-on-primary);
    border: none;
    border-radius: 50%;
    box-shadow: var(--shadow-xl);
    cursor: pointer;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s;
}

.back-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-top:hover {
    background: linear-gradient(135deg, var(--color-primary-hover), var(--color-primary-dark));
    box-shadow: 0 15px 30px rgba(var(--color-primary-rgb), 0.3);
}

.back-top__icon {
    font-size: 24px;
    font-weight: bold;
    line-height: 1;
    position: relative;
    z-index: 2;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    margin-bottom: 2px;
}

.back-top__text {
    font-size: 11px;
    font-weight: 700;
    position: relative;
    z-index: 2;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.5px;
}

/* ============ 5. PAGES - 页面特定样式 ============ */

/* ---- 收藏页面 (favorites.php) ---- */
.favorites-page .main {
    background: var(--color-bg-secondary);
}

.favorites-page .content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
}

.fav-wrap {
    max-width: 100%;
    margin: 0;
}

/* 空状态 */
.fav-empty {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-text-tertiary);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-border);
    margin-top: var(--space-xl);
}

.fav-empty__icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.fav-empty__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.fav-empty__desc {
    margin-bottom: var(--space-lg);
    font-size: 13px;
}

.fav-empty__action {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    text-decoration: none;
    border-radius: var(--radius-lg);
    font-weight: 600;
    font-size: 14px;
    box-shadow: 0 4px 6px rgba(var(--color-primary-rgb), 0.3);
    transition: all 0.2s ease;
}

.fav-empty__action:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 12px rgba(var(--color-primary-rgb), 0.4);
}

/* 收藏树容器 */
.fav-tree {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

/* 一级分类（根节点） */
.fav-node--root {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

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

.fav-node--root > .fav-node__content {
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-bottom: 1px solid var(--color-border);
    position: relative;
    overflow: hidden;
}

.fav-node--root > .fav-node__content::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.fav-node--root .fav-node__icon {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.9);
}

.fav-node--root .fav-node__name {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
}

.fav-node--root .fav-node__star {
    color: var(--color-warning);
    font-size: 14px;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.2));
}

.fav-node--root .fav-node__path {
    color: rgba(255, 255, 255, 0.8);
}

/* 子节点 - 深色文字（浅色背景） */
.fav-node--level1 .fav-node__path,
.fav-node--level2 .fav-node__path {
    color: var(--color-text-tertiary);
}

.fav-node--root .fav-btn {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

.fav-node--root .fav-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.fav-node--root .fav-btn--unlike:hover {
    background: var(--color-danger);
    border-color: var(--color-danger);
}

/* 子分类容器 */
.fav-children {
    padding: var(--space-md);
    background: var(--color-bg);
    position: relative;
}

.fav-children::before {
    content: "";
    position: absolute;
    left: 36px;
    top: 0;
    bottom: 16px;
    width: 1px;
    background: linear-gradient(to bottom, var(--color-border), transparent);
}

/* 二级分类 */
.fav-node--level1 {
    margin-bottom: var(--space-sm);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

.fav-node--level1:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary-light);
}

.fav-node--level1 > .fav-node__content {
    padding: var(--space-sm) var(--space-md);
    border-left: 3px solid var(--color-primary);
}

.fav-node--level1 .fav-node__icon {
    color: var(--color-primary);
    font-size: 16px;
}

.fav-node--level1 .fav-node__name {
    font-weight: 600;
    color: var(--color-text);
    font-size: 13px;
}

/* 三级及以下 */
.fav-node--level2 {
    margin-bottom: var(--space-xs);
    background: transparent;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
}

.fav-node--level2:hover {
    background: rgba(var(--color-primary-rgb), 0.05);
}

.fav-node--level2 > .fav-node__content {
    padding: var(--space-xs) var(--space-md);
}

.fav-node--level2 .fav-node__icon {
    font-size: 14px;
    opacity: 0.7;
}

.fav-node--level2 .fav-node__name {
    font-size: 12px;
    color: var(--color-text-secondary);
}

/* 祖先节点 */
.fav-node--ancestor:not(.fav-node--root):not(.fav-node--level1) {
    opacity: 0.7;
    background: transparent;
}

.fav-node--ancestor:not(.fav-node--root):not(.fav-node--level1):hover {
    opacity: 1;
    background: rgba(var(--color-primary-rgb), 0.05);
}

/* 通用节点结构 */
.fav-node__content {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    text-decoration: none;
    color: inherit;
    position: relative;
    transition: all 0.2s ease;
    border-radius: inherit;
}

/* 缩进系统 */
.fav-node__indent {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    position: relative;
}

.indent-line {
    width: 28px;
    height: 28px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.indent-line::before {
    content: "";
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 1px;
    background: var(--color-border);
    transform: translateX(-50%);
}

.indent-line--last::before {
    bottom: 50%;
    background: linear-gradient(to bottom, var(--color-border), transparent);
}

.indent-line--connector::after {
    content: "";
    position: absolute;
    left: 50%;
    top: 50%;
    width: 50%;
    height: 1px;
    background: var(--color-border);
    border-radius: 1px;
}

/* 图标 */
.fav-node__icon {
    width: 24px;
    text-align: center;
    flex-shrink: 0;
}

/* 内容区 */
.fav-node__body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.fav-node__name {
    display: flex;
    align-items: center;
    gap: 6px;
    word-break: break-all;
    line-height: 1.4;
}

.fav-node__star {
    flex-shrink: 0;
    color: var(--color-warning);
}

.fav-node__path {
    font-size: 11px;
    color: var(--color-text-tertiary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 2px;
}

/* 操作按钮组 */
.fav-node__actions {
    margin-left: auto;
    display: flex;
    gap: var(--space-xs);
    flex-shrink: 0;
    z-index: 10;
    position: relative;
}

/* 按钮样式 */
.fav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    white-space: nowrap;
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.fav-btn:hover {
    background: var(--color-border);
    color: var(--color-text);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.fav-btn--copy:hover {
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    border-color: var(--color-primary);
}

.fav-btn--unlike:hover {
    background: var(--color-danger);
    color: var(--color-text-on-primary);
    border-color: var(--color-danger);
}

.fav-btn.copied {
    background: var(--color-success);
    border-color: var(--color-success);
    color: var(--color-text-on-primary);
}

.fav-btn span {
    font-size: 12px;
}

/* 链接覆盖层 */
.fav-node__link {
    position: absolute;
    top: 0;
    left: 0;
    right: 100px;
    bottom: 0;
    z-index: 1;
}

.fav-node--root .fav-node__link {
    right: 140px;
}

/* 工具栏 */
.fav-toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding: var(--space-md) var(--space-lg);
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-sm);
}

.fav-toolbar__info {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-text-secondary);
    font-size: 13px;
}

/* Toast - 收藏页专用 */
.toast-stack {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    pointer-events: none;
}

.toast-stack .toast {
    background: var(--color-bg);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 14px 18px;
    box-shadow: var(--shadow-xl);
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 280px;
    max-width: 360px;
    transform: translateX(120%);
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    pointer-events: auto;
    border-left: 4px solid;
    border: 1px solid var(--color-border);
}

.toast-stack .toast.show {
    transform: translateX(0);
    opacity: 1;
}

.toast--success { border-left-color: var(--color-success); }
.toast--error { border-left-color: var(--color-danger); }
.toast--info { border-left-color: var(--color-primary); }

/* 确认对话框 */
.confirm-overlay {
    position: fixed;
    inset: 0;
    background: var(--color-bg-overlay);
    backdrop-filter: blur(4px);
    z-index: 10000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s;
    padding: var(--space-xl);
}

.confirm-overlay.active {
    display: flex;
    opacity: 1;
}

.confirm-dialog {
    background: var(--color-bg);
    border-radius: var(--radius-2xl);
    padding: 28px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-xl);
    transform: scale(0.9) translateY(20px);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    text-align: center;
}

.confirm-overlay.active .confirm-dialog {
    transform: scale(1) translateY(0);
}

.confirm-dialog__icon {
    width: 56px;
    height: 56px;
    background: var(--color-danger-light);
    color: var(--color-danger);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin: 0 auto 16px;
}

.confirm-dialog__title {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--space-sm);
}

.confirm-dialog__message {
    color: var(--color-text-secondary);
    margin-bottom: 20px;
    line-height: 1.5;
    font-size: 14px;
}

.confirm-dialog__actions {
    display: flex;
    gap: var(--space-md);
}

.confirm-dialog__btn {
    flex: 1;
    padding: 10px 18px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: none;
}

.confirm-dialog__btn--cancel {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.confirm-dialog__btn--confirm {
    background: var(--color-danger);
    color: var(--color-text-on-primary);
}

/* 动画 */
.fade-out {
    animation: fadeOut 0.3s ease forwards;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(-20px);
        height: 0;
        padding: 0;
        margin: 0;
        overflow: hidden;
    }
}

/* ---- 分类管理页面 (manage_categories.php) ---- */
.manage-categories-page .main {
    background: var(--color-bg-secondary);
}

.manage-categories-page .content {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-xl);
}

.mgmt-wrap {
    max-width: 100%;
    margin: 0;
}

/* 根分类卡片 */
.mgmt-root {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all 0.2s ease;
}

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

/* 根分类头部 */
.mgmt-root-hd {
    padding: var(--space-md) var(--space-lg);
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    user-select: none;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.mgmt-root-hd::before {
    content: "";
    position: absolute;
    top: -50%;
    right: -10%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.mgmt-root-hd:hover {
    filter: brightness(1.05);
}

/* 根分类的 toggle 按钮 */
.mgmt-toggle {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    font-size: 12px;
    flex-shrink: 0;
    color: rgba(255, 255, 255, 0.9);
    background: rgba(255, 255, 255, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.3);
    z-index: 1;
}

.mgmt-toggle.expanded {
    transform: rotate(90deg);
    background: rgba(255, 255, 255, 0.3);
}

/* 子分类的 toggle 按钮 */
.mgmt-body .mgmt-toggle {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    background: var(--color-primary-light);
    border: 1px solid var(--color-primary-light);
    margin-right: var(--space-xs);
    cursor: pointer;
}

.mgmt-body .mgmt-toggle.expanded {
    transform: rotate(90deg);
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    border-color: var(--color-primary);
}

.mgmt-title {
    flex: 1;
    font-weight: 700;
    font-size: 15px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    min-width: 0;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
    z-index: 1;
}

.mgmt-title__icon {
    font-size: 18px;
    flex-shrink: 0;
}

.mgmt-title__text {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.mgmt-meta {
    font-size: 11px;
    color: rgba(255, 255, 255, 0.8);
    background: rgba(255, 255, 255, 0.15);
    padding: 4px 10px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-weight: 600;
    flex-shrink: 0;
    z-index: 1;
}

/* 根分类操作按钮 */
.mgmt-root-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
    z-index: 1;
}

.mgmt-root:hover .mgmt-root-actions {
    opacity: 1;
}

/* 根目录按钮样式 */
.mgmt-root-hd .mgmt-btn {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.3);
}

.mgmt-root-hd .mgmt-btn:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.mgmt-root-hd .mgmt-btn--danger:hover {
    background: var(--color-danger);
    border-color: var(--color-danger);
}

.mgmt-body {
    display: none;
}

.mgmt-body.expanded {
    display: block;
}

/* 层级缩进 */
.mgmt-item {
    display: flex;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    border-left: 3px solid transparent;
    position: relative;
    transition: all 0.2s ease;
    background: var(--color-bg);
}

.mgmt-item:hover {
    background: var(--color-bg-secondary);
    border-left-color: var(--color-primary);
}

.mgmt-item.dragging {
    opacity: 0.4;
    background: var(--color-primary-light);
}

/* 二级分类缩进 */
.mgmt-body > .mgmt-item {
    padding-left: var(--space-xl);
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-bg-tertiary);
}

/* 三级分类缩进 */
.mgmt-body > .mgmt-body > .mgmt-item {
    padding-left: calc(var(--space-xl) * 2);
    background: linear-gradient(to right, var(--color-bg-tertiary) 0%, var(--color-bg) 30%);
}

/* 四级及以上分类缩进 */
.mgmt-body > .mgmt-body > .mgmt-body > .mgmt-item {
    padding-left: calc(var(--space-xl) * 3);
    background: linear-gradient(to right, var(--color-bg-tertiary) 0%, var(--color-bg-tertiary) 10%, var(--color-bg) 50%);
    opacity: 0.95;
}

/* 层级指示器 */
.mgmt-level-indicator {
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: transparent;
}

.mgmt-body > .mgmt-item .mgmt-level-indicator {
    background: var(--color-primary-light);
}

.mgmt-body > .mgmt-body > .mgmt-item .mgmt-level-indicator {
    background: rgba(var(--color-primary-rgb), 0.3);
}

.mgmt-body > .mgmt-body > .mgmt-body > .mgmt-item .mgmt-level-indicator {
    background: rgba(var(--color-primary-rgb), 0.2);
}

/* 排序手柄 */
.sort-handle {
    display: none;
    width: 20px;
    margin-right: var(--space-xs);
    color: var(--color-text-light);
    cursor: grab;
    flex-shrink: 0;
    font-size: 14px;
    text-align: center;
}

.sorting .sort-handle {
    display: block;
}

.sorting .mgmt-item,
.sorting .mgmt-root {
    cursor: move;
}

.sorting .mgmt-actions,
.sorting .mgmt-root-actions {
    display: none !important;
}

/* 分类图标 */
.mgmt-icon {
    width: 24px;
    text-align: center;
    margin-right: var(--space-xs);
    flex-shrink: 0;
    font-size: 16px;
}

/* 分类信息 */
.mgmt-info {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.mgmt-name {
    font-weight: 600;
    font-size: 13px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.mgmt-name__count {
    font-size: 11px;
    color: var(--color-text-tertiary);
    font-weight: 500;
    background: var(--color-bg-tertiary);
    padding: 1px 6px;
    border-radius: 8px;
    flex-shrink: 0;
}

.mgmt-path {
    font-size: 11px;
    color: var(--color-text-light);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 操作按钮组 */
.mgmt-actions {
    display: flex;
    gap: 4px;
    opacity: 0;
    transition: opacity 0.2s ease;
    flex-shrink: 0;
}

.mgmt-item:hover .mgmt-actions {
    opacity: 1;
}

/* 按钮样式 */
.mgmt-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 3px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.mgmt-btn:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.mgmt-btn--primary {
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    border-color: var(--color-primary);
}

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

.mgmt-btn--secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border-color: var(--color-border);
}

.mgmt-btn--secondary:hover {
    background: var(--color-border);
    color: var(--color-text);
}

.mgmt-btn--danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border-color: var(--color-danger-light);
}

.mgmt-btn--danger:hover {
    background: var(--color-danger);
    color: var(--color-text-on-primary);
    border-color: var(--color-danger);
}

.mgmt-btn--icon {
    width: 28px;
    height: 28px;
    padding: 0;
    font-size: 12px;
}

/* 添加子分类按钮 */
.mgmt-add {
    margin-left: var(--space-xl);
    padding: var(--space-sm) var(--space-lg);
    color: var(--color-primary);
    font-size: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    border-radius: var(--radius-md);
    margin-top: var(--space-xs);
    border: 1px dashed var(--color-border);
    background: transparent;
    transition: all 0.2s ease;
    font-weight: 600;
}

.mgmt-add:hover {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    border-style: solid;
}

/* 空状态 */
.mgmt-empty {
    text-align: center;
    padding: var(--space-3xl);
    color: var(--color-text-tertiary);
    background: var(--color-bg);
    border-radius: var(--radius-xl);
    border: 2px dashed var(--color-border);
    margin-top: var(--space-xl);
}

.mgmt-empty__icon {
    font-size: 48px;
    margin-bottom: var(--space-md);
    opacity: 0.5;
}

.mgmt-empty__title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-xs);
}

.mgmt-empty__desc {
    margin-bottom: var(--space-lg);
    font-size: 13px;
}

/* 浮动操作按钮 */
.fab-bar {
    position: fixed;
    bottom: 100px;
    right: 24px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    z-index: 100;
}

.fab {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    font-size: 20px;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-on-primary);
}

.fab:hover {
    transform: scale(1.05) translateY(-2px);
    box-shadow: var(--shadow-xl);
}

.fab:active {
    transform: scale(0.95);
}

.fab-p {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
}

.fab-p:hover {
    filter: brightness(1.1);
}

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

.fab-s:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.fab-sort {
    background: linear-gradient(135deg, var(--color-success) 0%, var(--color-success) 100%);
}

.fab-sort.active {
    background: linear-gradient(135deg, var(--color-danger) 0%, var(--color-danger) 100%);
}

.fab-sort:hover {
    filter: brightness(1.1);
}

/* 树形连接线 */
.mgmt-body {
    position: relative;
}

.mgmt-body::before {
    content: "";
    position: absolute;
    left: 24px;
    top: 0;
    bottom: 0;
    width: 1px;
    background: linear-gradient(to bottom, var(--color-border), transparent);
}

.mgmt-body > .mgmt-body::before {
    left: 48px;
}

.mgmt-body > .mgmt-body > .mgmt-body::before {
    left: 72px;
    opacity: 0.5;
}

/* 重命名输入框样式 */
.mgmt-rename-form {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    flex: 1;
    min-width: 0;
}

.mgmt-rename-input {
    flex: 1;
    padding: 6px 10px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius-md);
    font-size: 14px;
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    min-width: 0;
}

.mgmt-rename-input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(var(--color-primary-rgb), 0.1);
}

.mgmt-rename-actions {
    display: flex;
    gap: var(--space-xs);
    flex-shrink: 0;
}

/* ============ 6. UTILITIES - 工具类 ============ */

/* 排序模式样式 */
.sorting-mode .card {
    cursor: move;
    user-select: none;
    position: relative;
}

.sorting-mode .card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: rgba(var(--color-primary-rgb), 0.05);
    border: 2px dashed var(--color-primary-light);
    border-radius: inherit;
    pointer-events: none;
    z-index: 1;
    opacity: 0;
}

.sorting-mode .card:hover::before {
    opacity: 1;
}

.drag-handle {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    cursor: grab;
    z-index: 10;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    border: 1px solid var(--color-border);
}

.drag-handle:hover {
    color: var(--color-primary);
    background: white;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
}

.sort-order-badge {
    position: absolute;
    right: 12px;
    top: 12px;
    background: var(--color-primary);
    color: var(--color-text-on-primary);
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 700;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(var(--color-primary-rgb), 0.3);
}

.sorting-mode .card-grid .drag-handle {
    left: 8px;
    top: 8px;
    transform: none;
    width: 28px;
    height: 28px;
}

.sorting-mode .card-grid .sort-order-badge {
    right: 8px;
    top: 8px;
    width: 32px;
    height: 32px;
    font-size: 14px;
}

.dragging {
    opacity: 0.4;
    z-index: 1000;
    position: relative;
    cursor: grabbing;
}

.sorting-mode .card__actions,
.sorting-mode .batch-actions {
    opacity: 0.3;
    pointer-events: none;
}

/* 排序值显示 */
.action-sort-value {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 2px 8px;
    background: var(--color-primary);
    border: 1px solid var(--color-primary);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 700;
    color: var(--color-text-on-primary);
    margin-left: 4px;
    font-family: monospace;
}

.card-grid .action-sort-value {
    padding: 1px 6px;
    font-size: 10px;
}

/* 描述按钮修复 */
.card__actions button[onclick*="copyComponentDescription"],
.preview-box__actions button[onclick*="copyComponentDescription"] {
    min-width: 64px !important;
    white-space: nowrap !important;
    overflow: hidden !important;
    text-overflow: ellipsis !important;
}

.card-grid .card__actions button[onclick*="copyComponentDescription"] {
    min-width: 60px !important;
    font-size: 11px;
}

.modal__footer #desktopViewerDescBtn,
.modal__footer #mobileViewerDescBtn {
    min-width: 72px;
    white-space: nowrap;
}

/* 懒加载分类样式 */
.tree__loading {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    margin-left: 8px;
}

.loading-spinner-small {
    width: 16px;
    height: 16px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.category-loading-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 20px;
    color: #999;
    font-size: 14px;
}

.category-loading-placeholder .loading-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 10px;
}

.lazy-category-item:hover {
    background-color: rgba(var(--color-primary-rgb), 0.05);
}

.lazy-category-item.active {
    background-color: rgba(var(--color-primary-rgb), 0.1);
}

.lazy-category-item.selected {
    background-color: rgba(var(--color-primary-rgb), 0.15);
    box-shadow: inset 3px 0 0 var(--color-primary);
}

.tree__children.lazy-children-container {
    overflow: hidden;
}

.tree__item-link[tabindex="0"]:focus {
    outline: 2px solid var(--color-primary);
    outline-offset: -2px;
}

.tree__item-link[data-has-children="false"] .tree__toggle {
    display: none;
}

.tree__name .highlight {
    background-color: #fff3cd;
    color: #856404;
    padding: 0 2px;
    border-radius: 2px;
}

/* ============ 7. RESPONSIVE - 响应式设计 ============ */

@media (max-width: 1400px) {
    .header {
        padding: var(--space-md) var(--space-lg);
    }
    
    .header__left {
        max-width: 300px;
    }
}

@media (max-width: 1200px) {
    .header {
        padding: var(--space-md) var(--space-lg);
        height: 64px;
        gap: var(--space-lg);
    }
    
    .header__left {
        min-width: 160px;
        max-width: 280px;
    }
    
    .header__title-main {
        font-size: 18px;
    }
    
    .header__title-sub {
        font-size: 12px;
    }
    
    .header__actions {
        gap: var(--space-md);
    }
    
    .view-btn {
        padding: var(--space-sm) var(--space-md);
        min-width: 70px;
    }
    
    .btn-sm {
        padding: 8px 10px;
        font-size: 12px;
    }
    
    .sort-hint .sort-hint__text {
        display: none;
    }
    
    .user {
        min-width: 120px;
    }
    
    .user__name {
        font-size: 13px;
    }
}

@media (max-width: 1024px) {
    .mobile-header {
        display: block;
    }
    
    .header {
        display: none;
    }
    
    .sidebar {
        position: fixed;
        left: calc(-1 * var(--sidebar-width));
        top: 0;
        bottom: 0;
        z-index: 1000;
        box-shadow: var(--shadow-xl);
        border-right: none;
    }
    
    .sidebar.show {
        left: 0;
    }
    
    /* 修复：移动端显示关闭按钮 */
    .sidebar__close {
        display: flex;
    }
    
    .sidebar-overlay {
        display: none;
    }
    
    .sidebar.show ~ .sidebar-overlay {
        display: block;
    }
    
    .batch-actions {
        padding: var(--space-sm) var(--space-lg);
        height: 52px;
    }
    
    .content {
        padding: var(--space-lg);
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
        gap: var(--space-lg);
    }
    
    .categories__all,
    .tree {
        padding: 0 var(--space-lg);
    }
    
    .sidebar__brand,
    .sidebar__actions {
        padding: var(--space-md) var(--space-lg);
    }
    
    .tree__item-link {
        padding: var(--space-sm);
    }
    
    .tree__indent {
        width: 24px;
    }
    
    .tree__children {
        margin-left: 40px;
    }
    
    .preview-row {
        grid-template-columns: 1fr;
        min-height: 800px;
        gap: var(--space-lg);
    }
    
    .mobile-frame {
        border-width: 10px;
        border-radius: 20px;
        min-height: 350px;
    }
    
    .mobile-frame__notch {
        width: 80px;
        height: 16px;
    }
    
    .sort-notice {
        top: var(--mobile-header-height);
        padding: 10px 16px;
    }
    
    .sort-notice__content {
        font-size: 13px;
    }
    
    .sort-hint {
        display: none;
    }
    
    /* 收藏页响应式 */
    .favorites-page .content {
        padding: var(--space-lg);
    }
    
    .fav-node__actions {
        opacity: 1;
    }
    
    .fav-btn span {
        display: none;
    }
    
    .fav-btn {
        padding: var(--space-sm);
        width: 32px;
        height: 32px;
    }
    
    .indent-line {
        width: 20px;
    }
    
    .fav-children::before {
        left: 24px;
    }
    
    /* 分类管理页响应式 */
    .manage-categories-page .content {
        padding: var(--space-lg);
    }
    
    .fab-bar {
        bottom: 90px;
        right: 16px;
    }
    
    .fab {
        width: 44px;
        height: 44px;
        font-size: 18px;
    }
    
    .mgmt-btn {
        padding: 8px 12px;
    }
    
    .mgmt-btn--icon {
        width: 36px;
        height: 36px;
    }
    
    .mgmt-root-actions {
        opacity: 1;
    }
}

@media (max-width: 768px) {
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: var(--space-md);
    }
    
    .card-grid {
        border-radius: var(--radius-lg);
    }
    
    .card__preview .preview {
        min-height: 250px;
        max-height: 500px;
    }
    
    .card__actions {
        padding: var(--space-sm);
        gap: var(--space-xs);
    }
    
    .sidebar {
        width: 100%;
        max-width: 320px;
    }
    
    .sidebar__content {
        padding: var(--space-md) 0;
    }
    
    .tree__name {
        font-size: 13px;
    }
    
    .tree__count {
        font-size: 10px;
        padding: 1px 6px;
    }
    
    .welcome {
        padding: var(--space-md);
        margin: var(--space-sm) var(--space-sm) var(--space-lg);
    }
    
    .welcome__hero {
        padding: var(--space-lg);
        border-radius: var(--radius-md);
    }
    
    .welcome__badge {
        padding: var(--space-xs) var(--space-md);
        font-size: 0.8rem;
        margin-bottom: var(--space-md);
    }
    
    .welcome__heading {
        font-size: 1.25rem;
        margin-bottom: var(--space-sm);
    }
    
    .welcome__subheading {
        font-size: 0.9rem;
        margin-bottom: var(--space-md);
    }
    
    .welcome__actions {
        flex-direction: column;
        gap: var(--space-sm);
    }
    
    .welcome__actions .btn {
        width: 100%;
        padding: var(--space-md);
    }
    
    .features__grid {
        grid-template-columns: 1fr;
        gap: var(--space-md);
    }
    
    .feature {
        padding: var(--space-md);
    }
    
    .modal-note .modal__dialog {
        width: 98%;
        max-height: 95vh;
    }
    
    .modal-note .modal__body {
        padding: 15px;
        height: calc(95vh - 120px);
    }
    
    .editor-content,
    .editor-code {
        min-height: 300px;
        font-size: 13px;
    }
    
    .view-btn {
        padding: 6px 8px;
        font-size: 12px;
    }
    
    .view-btn__icon {
        font-size: 14px;
    }
    
    /* 收藏页移动端 */
    .favorites-page .content {
        padding: var(--space-md);
    }
    
    .fav-toolbar {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: stretch;
    }
    
    .fav-node--root {
        border-radius: var(--radius-md);
    }
    
    .fav-node--root > .fav-node__content {
        padding: var(--space-md);
    }
    
    .fav-children {
        padding: var(--space-sm);
    }
    
    .fav-children::before {
        display: none;
    }
    
    /* 分类管理页移动端 */
    .manage-categories-page .content {
        padding: var(--space-md);
    }
    
    .mgmt-root-hd {
        padding: var(--space-sm) var(--space-md);
        flex-wrap: wrap;
    }
    
    .mgmt-root-actions {
        width: 100%;
        justify-content: flex-end;
        margin-top: var(--space-xs);
        opacity: 1;
    }
    
    .mgmt-item {
        padding: var(--space-sm) var(--space-md);
        flex-wrap: wrap;
    }
    
    .mgmt-actions {
        width: 100%;
        justify-content: flex-end;
        opacity: 1;
        margin-top: var(--space-xs);
    }
    
    .mgmt-body > .mgmt-item {
        padding-left: var(--space-lg);
    }
    
    .mgmt-body > .mgmt-body > .mgmt-item {
        padding-left: calc(var(--space-lg) * 2);
    }
    
    .mgmt-body > .mgmt-body > .mgmt-body > .mgmt-item {
        padding-left: calc(var(--space-lg) * 3);
    }
    
    .mgmt-body::before {
        display: none;
    }
    
    .fab-bar {
        bottom: 72px;
    }
    
    .code-description__textarea {
        min-height: 60px;
        font-size: 14px;
    }
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
        gap: var(--space-lg);
    }
    
    .card__meta {
        flex-direction: column;
        gap: var(--space-sm);
        align-items: flex-start;
        font-size: 12px;
    }
    
    .mobile-header__inner {
        grid-template-columns: 48px 1fr 48px 48px;
    }
    
    .mobile-header__nav,
    .mobile-header__action {
        width: 48px;
        height: 56px;
    }
    
    .mobile-header__title {
        grid-column: 2 / span 2;
        padding: 0 var(--space-xs);
    }
    
    .mobile-header__title-text {
        font-size: 14px;
    }
    
    .preview-box {
        border-radius: var(--radius-lg);
    }
    
    .preview-box__header {
        padding: var(--space-sm) var(--space-md);
        height: 44px;
    }
    
    .preview-box__title {
        font-size: 13px;
    }
    
    .mobile-frame {
        border-width: 8px;
        border-radius: 16px;
        min-height: 300px;
    }
    
    .preview-box-mobile .preview-box__content {
        padding: var(--space-md);
    }
    
    .code-editor__textarea {
        min-height: 180px;
        font-size: 12px;
    }
    
    .modal__dialog {
        width: 95%;
        max-height: 90vh;
    }
    
    .modal__header,
    .modal__footer {
        padding: var(--space-md);
    }
    
    .modal__body {
        padding: var(--space-lg);
        max-height: 70vh;
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: var(--space-sm);
    }
    
    .card-grid {
        border-radius: var(--radius-md);
    }
    
    .mgmt-btn {
        padding: 6px 8px;
        font-size: 11px;
    }
    
    .mgmt-btn--icon {
        width: 32px;
        height: 32px;
    }
    
    .fab-bar {
        bottom: 85px;
        right: 12px;
    }
    
    .fab {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .mobile-header__title-text {
        font-size: 13px;
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
        gap: var(--space-sm);
    }
    
    .mobile-header__inner {
        grid-template-columns: 44px 1fr 44px 44px;
    }
    
    .mobile-header__nav,
    .mobile-header__action {
        width: 44px;
        height: 56px;
    }
    
    .welcome__heading {
        font-size: 1.1rem;
    }
    
    .welcome__subheading {
        font-size: 0.85rem;
    }
    
    .feature__title {
        font-size: 0.95rem;
    }
    
    .feature__desc {
        font-size: 0.85rem;
    }
    
    .note-editor__tabs {
        flex-direction: column;
    }
    
    .note-editor__tab {
        width: 100%;
        justify-content: center;
    }
    
    .fav-btn {
        width: 32px;
        height: 32px;
        padding: 6px 8px;
    }
}

@media (max-width: 360px) {
    .mobile-header__title-text {
        font-size: 12px;
    }
    
    .grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
        gap: var(--space-xs);
    }
    
    .back-top {
        width: 44px;
        height: 44px;
        bottom: 15px;
        right: 15px;
    }
    
    .back-top__icon {
        font-size: 18px;
        margin-bottom: 0;
    }
    
    .back-top__text {
        font-size: 9px;
    }
}

/* ============ 8. PRINT - 打印样式 ============ */
@media print {
    .sidebar,
    .mobile-header,
    .header,
    .batch-actions,
    .card__actions,
    .view-switcher {
        display: none;
    }
    
    .app {
        display: block;
    }
    
    .main {
        height: auto;
        overflow: visible;
    }
    
    .content {
        overflow: visible;
    }
    
    .card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .back-top {
        display: none;
    }
}

/* ============================================
   模块收藏功能样式 - 优化版（紧凑布局 + 统一尺寸）
   ============================================ */

/* 头部统计区域 - 紧凑布局 */
.header__stats {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-top: 6px;
}

.header__filter-btn {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    color: var(--color-text-tertiary);
    font-size: 12px;
    font-weight: 500;
}

.header__filter-btn:hover {
    background: var(--color-border);
    border-color: var(--color-border-dark);
}

.header__filter-btn--active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-on-primary);
}

.header__filter-btn--active:hover {
    background: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
}

.header__filter-count {
    font-weight: 600;
    background: rgba(255,255,255,0.2);
    padding: 1px 6px;
    border-radius: 10px;
    font-size: 11px;
}

.header__filter-btn--active .header__filter-count {
    background: rgba(255,255,255,0.25);
}

/* 收藏按钮 - 统一尺寸和颜色变量 */
.btn-favorite {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0;
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 16px;
    color: var(--color-text-light);
}

.btn-favorite:hover {
    border-color: var(--color-warning);
    color: var(--color-warning);
    background: var(--color-warning-light);
}

.btn-favorite--active {
    color: var(--color-warning);
    border-color: var(--color-warning);
    background: var(--color-warning-light);
}

.btn-favorite--active:hover {
    color: var(--color-warning);
    border-color: var(--color-warning);
    background: var(--color-warning-light);
    opacity: 0.8;
}

/* 手机端网格中的收藏按钮 - 保持统一尺寸 */
.card-grid .btn-favorite {
    width: 36px;
    height: 36px;
    font-size: 16px;
}

/* 电脑端和双端列表中的收藏按钮 - 与其他按钮一致 */
.card-desktop .btn-favorite,
.card-both .btn-favorite {
    width: auto;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-sm);
    font-size: 16px;
}

/* 收藏视图空状态 */
.empty-favorites {
    text-align: center;
    padding: 80px 20px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    margin: 20px 0;
}

.empty-favorites__icon {
    font-size: 56px;
    margin-bottom: 20px;
    opacity: 0.4;
}

.empty-favorites__title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.empty-favorites__desc {
    font-size: 14px;
    color: var(--color-text-tertiary);
    margin-bottom: 24px;
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

/* 手机视图适配 */
@media (max-width: 768px) {
    .header__stats {
        flex-wrap: wrap;
        gap: 6px;
    }
    
    .header__filter-btn {
        padding: 3px 8px;
        font-size: 11px;
    }
    
    .btn-favorite {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .card-grid .btn-favorite {
        width: 32px;
        height: 32px;
        font-size: 14px;
    }
    
    .card-desktop .btn-favorite,
    .card-both .btn-favorite {
        min-width: 32px;
        height: 32px;
        padding: 0 var(--space-xs);
        font-size: 14px;
    }
}

.sidebar__fav-mode {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s;
}
.sidebar__fav-mode:hover {
    background: var(--color-warning-light);
}
.sidebar__fav-mode input {
    display: none;
}
.sidebar__fav-mode .fav-mode-box {
    width: 16px;
    height: 16px;
    border: 2px solid var(--color-text-light);
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: var(--color-warning);
    transition: all 0.2s;
}
.sidebar__fav-mode input:checked + .fav-mode-box {
    background: var(--color-warning);
    border-color: var(--color-warning);
}
.sidebar__fav-mode input:checked + .fav-mode-box::after {
    content: "✓";
    color: white;
}
.sidebar__actions-group .sidebar__fav-mode.sidebar__fav-mode-active {
    background: var(--color-warning-light);
}

/* 收藏模式下的分类链接样式 - 包括选中的 */
.fav-mode-active .tree__count,
.fav-mode-active .tree__item-link.active .tree__count {
    background: var(--color-warning);
    color: white;
}
.fav-mode-active .btn-category__count {
    background: var(--color-warning);
    color: white;
}