/* ============================================================
 * 众泰云 Component Library CSS
 * 依赖: tokens.css, design-tokens-extended.css
 *
 * 完整组件库，对齐 shadcn/ui + Radix UI 设计规范。
 * 所有组件：
 *   - 支持暗色模式
 *   - 支持6态覆盖（loading/error/empty/success/unauthorized/not-found）
 *   - WCAG 2.2 AA 对比度
 *   - 键盘可访问
 *
 * 组件清单:
 *   1.  Button        11. Dropdown/Menu
 *   2.  Input         12. Pagination
 *   3.  Card          13. Breadcrumb
 *   4.  Modal/Dialog   14. Tooltip
 *   5.  Table         15. Progress/Loading
 *   6.  Badge/Tag     16. Skeleton
 *   7.  Alert         17. Avatar
 *   8.  Toast         18. Empty State
 *   9.  Tabs
 *   10. Accordion
 * ============================================================ */

/* ============================================================
   1. Button 按钮
   变体: primary / secondary / ghost / danger / icon / split
   尺寸: xs / sm / md / lg / xl / (icon-only)
   状态: loading / disabled
   ============================================================ */

/* --- 基础按钮 --- */
.cl-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--btn-icon-gap);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    line-height: var(--leading-none);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    user-select: none;
    white-space: nowrap;
    text-decoration: none;
    vertical-align: middle;
    transition: var(--transition-color-shadow);
    -webkit-tap-highlight-color: transparent;
}

.cl-btn:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}

.cl-btn:disabled,
.cl-btn[disabled] {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* --- 尺寸 --- */
.cl-btn-xs { height: var(--btn-height-xs); padding: 0 var(--btn-padding-x-xs); font-size: var(--text-xs); border-radius: var(--radius-sm); }
.cl-btn-sm { height: var(--btn-height-sm); padding: 0 var(--btn-padding-x-sm); font-size: var(--text-xs); }
.cl-btn-md { height: var(--btn-height-md); padding: 0 var(--btn-padding-x-md); font-size: var(--text-sm); }
.cl-btn-lg { height: var(--btn-height-lg); padding: 0 var(--btn-padding-x-lg); font-size: var(--text-base); }
.cl-btn-xl { height: var(--btn-height-xl); padding: 0 var(--btn-padding-x-xl); font-size: var(--text-lg); border-radius: var(--radius-lg); }

/* --- 变体: primary --- */
.cl-btn-primary {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-sm);
}
.cl-btn-primary:hover {
    background-color: var(--color-primary-hover);
    border-color: var(--color-primary-hover);
    box-shadow: var(--shadow-color-primary);
}
.cl-btn-primary:active {
    background-color: var(--color-primary-active);
    border-color: var(--color-primary-active);
    transform: translateY(1px);
}

/* --- 变体: secondary --- */
.cl-btn-secondary {
    background-color: var(--surface-2);
    color: var(--color-text-primary);
    border-color: var(--color-border);
}
.cl-btn-secondary:hover {
    background-color: var(--surface-3);
    border-color: var(--color-text-tertiary);
}
.cl-btn-secondary:active {
    background-color: var(--color-border);
    transform: translateY(1px);
}

/* --- 变体: ghost --- */
.cl-btn-ghost {
    background-color: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}
.cl-btn-ghost:hover {
    background-color: var(--surface-2);
    color: var(--color-text-primary);
}
.cl-btn-ghost:active {
    background-color: var(--surface-3);
}

/* --- 变体: danger --- */
.cl-btn-danger {
    background-color: var(--color-error);
    color: var(--color-white);
    border-color: var(--color-error);
    box-shadow: var(--shadow-sm);
}
.cl-btn-danger:hover {
    background-color: var(--color-error-hover);
    border-color: var(--color-error-hover);
    box-shadow: var(--shadow-color-error);
}
.cl-btn-danger:active {
    background-color: var(--color-error-active);
    transform: translateY(1px);
}

/* --- 变体: outline --- */
.cl-btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}
.cl-btn-outline:hover {
    background-color: var(--primary-50);
    border-color: var(--color-primary-hover);
}
.cl-btn-outline:active {
    background-color: var(--primary-100);
}

/* --- 变体: icon-only --- */
.cl-btn-icon {
    width: var(--btn-height-md);
    height: var(--btn-height-md);
    padding: 0;
    border-radius: var(--radius-md);
}
.cl-btn-icon.cl-btn-sm { width: var(--btn-height-sm); height: var(--btn-height-sm); }
.cl-btn-icon.cl-btn-lg { width: var(--btn-height-lg); height: var(--btn-height-lg); }
.cl-btn-icon svg { width: var(--btn-icon-size); height: var(--btn-icon-size); }

/* --- 变体: split --- */
.cl-btn-split {
    display: inline-flex;
    border-radius: var(--radius-md);
    overflow: hidden;
}
.cl-btn-split .cl-btn {
    border-radius: 0;
    box-shadow: none;
}
.cl-btn-split .cl-btn:first-child {
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    border-right: none;
}
.cl-btn-split .cl-btn:last-child {
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    width: var(--btn-height-md);
    padding: 0;
}

/* --- 状态: loading --- */
.cl-btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}
.cl-btn-loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16px;
    height: 16px;
    margin: -8px 0 0 -8px;
    border: 2px solid currentColor;
    border-top-color: transparent;
    border-radius: var(--radius-full);
    animation: cl-spin var(--duration-slowest) linear infinite;
    color: var(--color-on-primary);
}
.cl-btn-secondary.cl-btn-loading::after,
.cl-btn-ghost.cl-btn-loading::after {
    color: var(--color-text-primary);
}

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

/* --- 按钮: 块级 --- */
.cl-btn-block {
    display: flex;
    width: 100%;
}

/* ============================================================
   2. Input 输入框
   类型: text / textarea / select / checkbox / radio / switch
   状态: default / focus / error / success / disabled
   ============================================================ */

/* --- 文本输入 --- */
.cl-input-wrapper {
    display: flex;
    flex-direction: column;
    gap: var(--space-form-label);
}

.cl-input-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--form-text-label);
}

.cl-input-hint {
    font-size: var(--text-xs);
    color: var(--form-text-hint);
    margin-top: var(--space-1);
}

.cl-input {
    display: block;
    width: 100%;
    height: var(--input-height-md);
    padding: 0 var(--input-padding-x);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--form-text-color);
    background-color: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border-color);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    -webkit-appearance: none;
    appearance: none;
}

.cl-input::placeholder {
    color: var(--form-text-placeholder);
}

.cl-input:hover {
    border-color: var(--form-border-color-hover);
}

.cl-input:focus {
    outline: none;
    border-color: var(--form-border-color-focus);
    box-shadow: var(--form-focus-ring);
}

.cl-input:disabled,
.cl-input[readonly] {
    background-color: var(--form-bg-disabled);
    cursor: not-allowed;
    opacity: 0.7;
}

.cl-input.cl-input-sm { height: var(--input-height-sm); font-size: var(--text-xs); }
.cl-input.cl-input-lg { height: var(--input-height-lg); font-size: var(--text-base); }

/* 验证状态 */
.cl-input.is-error,
.cl-input-wrapper.is-error .cl-input {
    border-color: var(--form-border-color-error);
}
.cl-input.is-error:focus,
.cl-input-wrapper.is-error .cl-input:focus {
    box-shadow: var(--form-focus-ring-error);
}

.cl-input.is-success,
.cl-input-wrapper.is-success .cl-input {
    border-color: var(--form-border-color-success);
}

.cl-input-error-text {
    font-size: var(--text-xs);
    color: var(--form-text-error);
    margin-top: var(--space-1);
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

.cl-input-success-text {
    font-size: var(--text-xs);
    color: var(--form-text-success);
    margin-top: var(--space-1);
}

/* --- Textarea --- */
.cl-textarea {
    min-height: 80px;
    padding: var(--input-padding-y) var(--input-padding-x);
    line-height: var(--leading-normal);
    resize: vertical;
}

/* --- Select --- */
.cl-select {
    display: block;
    width: 100%;
    height: var(--input-height-md);
    padding: 0 var(--space-8) 0 var(--input-padding-x);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--form-text-color);
    background-color: var(--form-bg);
    border: var(--form-border-width) solid var(--form-border-color);
    border-radius: var(--form-radius);
    transition: var(--form-transition);
    -webkit-appearance: none;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8' fill='none'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%236b7280' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right var(--space-3) center;
    cursor: pointer;
}
.cl-select:focus {
    outline: none;
    border-color: var(--form-border-color-focus);
    box-shadow: var(--form-focus-ring);
}

/* --- Checkbox --- */
.cl-checkbox {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    user-select: none;
}
.cl-checkbox input[type="checkbox"] {
    width: 18px;
    height: 18px;
    margin: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* --- Radio --- */
.cl-radio {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    user-select: none;
}
.cl-radio input[type="radio"] {
    width: 18px;
    height: 18px;
    margin: 0;
    accent-color: var(--color-primary);
    cursor: pointer;
}

/* --- Switch --- */
.cl-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    cursor: pointer;
    user-select: none;
}
.cl-switch input {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}
.cl-switch-track {
    width: 44px;
    height: 24px;
    background-color: var(--color-border);
    border-radius: var(--radius-full);
    position: relative;
    transition: background-color var(--duration-fast) var(--ease-default);
}
.cl-switch-track::after {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    width: 20px;
    height: 20px;
    background-color: var(--color-white);
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
    transition: transform var(--duration-normal) var(--ease-spring);
}
.cl-switch input:checked + .cl-switch-track {
    background-color: var(--color-primary);
}
.cl-switch input:checked + .cl-switch-track::after {
    transform: translateX(20px);
}
.cl-switch input:focus-visible + .cl-switch-track {
    box-shadow: var(--focus-ring);
}
.cl-switch input:disabled + .cl-switch-track {
    opacity: 0.5;
    cursor: not-allowed;
}

/* --- 输入组（带图标） --- */
.cl-input-group {
    position: relative;
    display: flex;
    align-items: center;
}
.cl-input-group .cl-input-icon {
    position: absolute;
    left: var(--space-3);
    pointer-events: none;
    color: var(--color-text-tertiary);
}
.cl-input-group .cl-input-icon + .cl-input {
    padding-left: var(--space-10);
}
.cl-input-group .cl-input-action {
    position: absolute;
    right: var(--space-2);
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
}
.cl-input-group .cl-input-action:hover {
    color: var(--color-text-primary);
    background-color: var(--surface-3);
}

/* ============================================================
   3. Card 卡片
   变体: basic / elevated / outlined / glass
   区域: header / body / footer / actions
   ============================================================ */

.cl-card {
    background-color: var(--surface-2);
    border-radius: var(--card-radius);
    border: var(--card-border-width) solid var(--color-border);
    overflow: hidden;
    transition: var(--transition-color-shadow);
}

/* --- 变体: elevated --- */
.cl-card-elevated {
    border-color: transparent;
    box-shadow: var(--shadow-md);
}
.cl-card-elevated:hover {
    box-shadow: var(--shadow-lg);
}

/* --- 变体: outlined --- */
.cl-card-outlined {
    background-color: transparent;
    border: 2px solid var(--color-border);
}
.cl-card-outlined:hover {
    border-color: var(--color-text-tertiary);
}

/* --- 变体: glass --- */
.cl-card-glass {
    background-color: rgba(255, 255, 255, 0.08);
    backdrop-filter: var(--blur-md) var(--blur-saturate);
    -webkit-backdrop-filter: var(--blur-md) var(--blur-saturate);
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: var(--shadow-lg);
}
:root[data-theme="dark"] .cl-card-glass {
    background-color: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.08);
}

/* --- 区域 --- */
.cl-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: var(--space-card-padding);
    padding-bottom: 0;
}
.cl-card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin: 0;
}
.cl-card-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}
.cl-card-body {
    padding: var(--space-card-padding);
}
.cl-card-body.cl-card-body-flush {
    padding: 0;
}
.cl-card-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-card-padding);
    padding-top: 0;
    border-top: 1px solid var(--color-border-light);
}
.cl-card-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}
.cl-card-media {
    width: 100%;
    overflow: hidden;
}
.cl-card-media img {
    width: 100%;
    height: auto;
    display: block;
}

/* --- 卡片交互态 --- */
.cl-card-interactive {
    cursor: pointer;
}
.cl-card-interactive:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}
.cl-card-interactive:active {
    transform: translateY(0);
}

/* ============================================================
   4. Modal / Dialog 模态框
   ============================================================ */

.cl-modal-backdrop {
    position: fixed;
    inset: 0;
    background-color: var(--surface-overlay);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
    z-index: var(--z-modal-backdrop);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    opacity: 0;
    animation: cl-fade-in var(--duration-normal) var(--ease-default) forwards;
}

.cl-modal {
    background-color: var(--surface-1);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-modal);
    width: 100%;
    max-width: var(--modal-width-md);
    max-height: var(--modal-max-height);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transform: scale(0.96) translateY(8px);
    opacity: 0;
    animation: cl-modal-in var(--duration-normal) var(--ease-spring) forwards;
}

@keyframes cl-modal-in {
    to {
        transform: scale(1) translateY(0);
        opacity: 1;
    }
}

@keyframes cl-fade-in {
    to { opacity: 1; }
}

/* 尺寸 */
.cl-modal-sm { max-width: var(--modal-width-sm); }
.cl-modal-md { max-width: var(--modal-width-md); }
.cl-modal-lg { max-width: var(--modal-width-lg); }
.cl-modal-xl { max-width: var(--modal-width-xl); }
.cl-modal-full { max-width: var(--modal-width-full); max-height: 100vh; border-radius: 0; }

.cl-modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-6);
    padding-bottom: var(--space-4);
}
.cl-modal-title {
    font-size: var(--text-xl);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin: 0;
}
.cl-modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: var(--space-2);
    border-radius: var(--radius-md);
    transition: var(--transition-color);
    display: flex;
    align-items: center;
    justify-content: center;
}
.cl-modal-close:hover {
    background-color: var(--surface-3);
    color: var(--color-text-primary);
}
.cl-modal-close:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}
.cl-modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    flex: 1;
}
.cl-modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: var(--space-3);
    padding: var(--space-6);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border-light);
}

/* --- Drawer 抽屉 --- */
.cl-drawer-backdrop {
    position: fixed;
    inset: 0;
    background-color: var(--surface-overlay);
    z-index: var(--z-drawer-backdrop);
    opacity: 0;
    animation: cl-fade-in var(--duration-normal) var(--ease-default) forwards;
}
.cl-drawer {
    position: fixed;
    top: 0;
    bottom: 0;
    width: var(--drawer-width-md);
    max-width: 90vw;
    background-color: var(--surface-1);
    box-shadow: var(--shadow-2xl);
    z-index: var(--z-drawer);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}
.cl-drawer-left { left: 0; transform: translateX(-100%); animation: cl-drawer-slide-right var(--duration-slow) var(--ease-out) forwards; }
.cl-drawer-right { right: 0; transform: translateX(100%); animation: cl-drawer-slide-left var(--duration-slow) var(--ease-out) forwards; }

@keyframes cl-drawer-slide-right {
    to { transform: translateX(0); }
}
@keyframes cl-drawer-slide-left {
    to { transform: translateX(0); }
}

/* ============================================================
   5. Table 表格
   变体: striped / bordered / hoverable / sticky-header
   ============================================================ */

.cl-table-wrapper {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.cl-table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-sm);
    color: var(--color-text-primary);
}

.cl-table thead th {
    text-align: left;
    padding: var(--table-cell-padding-y) var(--table-cell-padding-x);
    font-weight: var(--font-semibold);
    color: var(--color-text-secondary);
    background-color: var(--surface-2);
    border-bottom: 2px solid var(--color-border);
    white-space: nowrap;
}

.cl-table tbody td {
    padding: var(--table-cell-padding-y) var(--table-cell-padding-x);
    border-bottom: 1px solid var(--color-border-light);
    vertical-align: middle;
}

/* striped */
.cl-table-striped tbody tr:nth-child(even) {
    background-color: var(--surface-2);
}

/* bordered */
.cl-table-bordered th,
.cl-table-bordered td {
    border: 1px solid var(--color-border-light);
}

/* hoverable */
.cl-table-hoverable tbody tr {
    transition: background-color var(--duration-fast) var(--ease-default);
}
.cl-table-hoverable tbody tr:hover {
    background-color: var(--primary-50);
}

/* sticky-header */
.cl-table-sticky thead th {
    position: sticky;
    top: 0;
    z-index: var(--z-sticky);
    background-color: var(--surface-2);
}

/* compact */
.cl-table-compact th,
.cl-table-compact td {
    padding: var(--space-1) var(--space-2);
}

/* ============================================================
   6. Badge / Tag 徽章/标签
   颜色: primary / secondary / success / warning / error / info
   尺寸: sm / md / lg
   ============================================================ */

.cl-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    height: var(--badge-height-md);
    padding: 0 var(--badge-padding-x);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    line-height: 1;
    border-radius: var(--radius-full);
    white-space: nowrap;
}

/* 尺寸 */
.cl-badge-sm { height: var(--badge-height-sm); font-size: 10px; padding: 0 var(--space-1); }
.cl-badge-lg { height: var(--badge-height-lg); font-size: var(--text-sm); padding: 0 var(--space-3); }

/* 颜色变体 */
.cl-badge-primary   { background-color: var(--primary-100);   color: var(--primary-700); }
.cl-badge-secondary { background-color: var(--secondary-100); color: var(--secondary-700); }
.cl-badge-success   { background-color: var(--success-100);   color: var(--success-600); }
.cl-badge-warning   { background-color: var(--warning-100);   color: var(--warning-600); }
.cl-badge-error     { background-color: var(--error-100);     color: var(--error-600); }
.cl-badge-info      { background-color: var(--info-100);      color: var(--info-600); }

/* 暗色模式徽章 */
:root[data-theme="dark"] .cl-badge-primary   { background-color: rgba(34,211,238,0.15); color: var(--primary-300); }
:root[data-theme="dark"] .cl-badge-secondary { background-color: rgba(251,191,36,0.15);  color: var(--secondary-300); }
:root[data-theme="dark"] .cl-badge-success   { background-color: rgba(52,211,153,0.15); color: var(--success-500); }
:root[data-theme="dark"] .cl-badge-warning   { background-color: rgba(251,191,36,0.15);  color: var(--warning-500); }
:root[data-theme="dark"] .cl-badge-error     { background-color: rgba(248,113,113,0.15); color: var(--error-500); }
:root[data-theme="dark"] .cl-badge-info      { background-color: rgba(96,165,250,0.15);  color: var(--info-500); }

/* dot 变体 */
.cl-badge-dot::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: currentColor;
}

/* outline 变体 */
.cl-badge-outline {
    background-color: transparent;
    border: 1px solid currentColor;
}

/* --- Tag 标签 --- */
.cl-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    background-color: var(--surface-3);
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
}
.cl-tag-removable {
    padding-right: var(--space-1);
}
.cl-tag-remove {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: 0;
    display: flex;
    align-items: center;
    border-radius: var(--radius-sm);
    margin-left: var(--space-1);
}
.cl-tag-remove:hover {
    color: var(--color-error);
}

/* ============================================================
   7. Alert 提示
   变体: info / success / warning / error
   ============================================================ */

.cl-alert {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    font-size: var(--text-sm);
}

.cl-alert-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cl-alert-content {
    flex: 1;
    min-width: 0;
}
.cl-alert-title {
    font-weight: var(--font-semibold);
    color: inherit;
    margin: 0 0 var(--space-1) 0;
}
.cl-alert-message {
    color: inherit;
    opacity: 0.85;
}

.cl-alert-dismiss {
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    opacity: 0.6;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}
.cl-alert-dismiss:hover {
    opacity: 1;
    background-color: rgba(0, 0, 0, 0.05);
}

/* 变体 */
.cl-alert-info {
    background-color: var(--info-50);
    border-color: var(--info-100);
    color: var(--info-600);
}
.cl-alert-success {
    background-color: var(--success-50);
    border-color: var(--success-100);
    color: var(--success-600);
}
.cl-alert-warning {
    background-color: var(--warning-50);
    border-color: var(--warning-100);
    color: var(--warning-600);
}
.cl-alert-error {
    background-color: var(--error-50);
    border-color: var(--error-100);
    color: var(--error-600);
}

/* 暗色模式 */
:root[data-theme="dark"] .cl-alert-info    { background-color: rgba(96,165,250,0.10); border-color: rgba(96,165,250,0.20); color: var(--info-500); }
:root[data-theme="dark"] .cl-alert-success { background-color: rgba(52,211,153,0.10); border-color: rgba(52,211,153,0.20); color: var(--success-500); }
:root[data-theme="dark"] .cl-alert-warning { background-color: rgba(251,191,36,0.10); border-color: rgba(251,191,36,0.20); color: var(--warning-500); }
:root[data-theme="dark"] .cl-alert-error   { background-color: rgba(248,113,113,0.10); border-color: rgba(248,113,113,0.20); color: var(--error-500); }

/* ============================================================
   8. Toast 通知
   ============================================================ */

.cl-toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: var(--z-toast-container);
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    width: var(--toast-width);
    max-width: var(--toast-max-width);
    pointer-events: none;
}

.cl-toast {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-4);
    background-color: var(--surface-1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    pointer-events: auto;
    transform: translateX(120%);
    animation: cl-toast-in var(--duration-slow) var(--ease-spring) forwards;
}

.cl-toast.cl-toast-leaving {
    animation: cl-toast-out var(--duration-normal) var(--ease-in-out) forwards;
}

@keyframes cl-toast-in {
    to { transform: translateX(0); }
}
@keyframes cl-toast-out {
    to { transform: translateX(120%); opacity: 0; }
}

.cl-toast-icon {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cl-toast-content {
    flex: 1;
    min-width: 0;
}
.cl-toast-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}
.cl-toast-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    margin-top: var(--space-1);
}
.cl-toast-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-tertiary);
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}
.cl-toast-close:hover {
    color: var(--color-text-primary);
    background-color: var(--surface-3);
}

/* Toast 变体 */
.cl-toast-success .cl-toast-icon { color: var(--color-success); }
.cl-toast-error .cl-toast-icon   { color: var(--color-error); }
.cl-toast-warning .cl-toast-icon { color: var(--color-warning); }
.cl-toast-info .cl-toast-icon    { color: var(--color-info); }

/* Toast 进度条 */
.cl-toast-progress {
    position: absolute;
    bottom: 0;
    left: 0;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    animation: cl-toast-progress var(--duration-slowest) linear forwards;
    transform-origin: left;
}
.cl-toast { position: relative; overflow: hidden; }

@keyframes cl-toast-progress {
    from { width: 100%; }
    to { width: 0%; }
}

/* 移动端Toast */
@media (max-width: 480px) {
    .cl-toast-container {
        top: var(--space-4);
        right: var(--space-4);
        left: var(--space-4);
        width: auto;
    }
}

/* ============================================================
   9. Tabs 标签页
   ============================================================ */

.cl-tabs {
    display: flex;
    flex-direction: column;
}

.cl-tabs-list {
    display: flex;
    gap: var(--space-1);
    border-bottom: 2px solid var(--color-border);
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
}
.cl-tabs-list::-webkit-scrollbar { display: none; }

.cl-tab {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    height: var(--tab-height);
    padding: 0 var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    background: none;
    border: none;
    border-bottom: var(--tab-indicator-height) solid transparent;
    cursor: pointer;
    white-space: nowrap;
    transition: var(--transition-color);
    margin-bottom: -2px;
}
.cl-tab:hover {
    color: var(--color-text-primary);
}
.cl-tab:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    border-radius: var(--radius-sm);
}
.cl-tab.cl-tab-active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
    font-weight: var(--font-semibold);
}
.cl-tab:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.cl-tab-badge {
    margin-left: var(--space-1);
}

.cl-tabs-panel {
    padding: var(--space-4) 0;
    display: none;
}
.cl-tabs-panel.cl-tab-panel-active {
    display: block;
    animation: cl-fade-in var(--duration-normal) var(--ease-default);
}

/* Pills 变体 */
.cl-tabs-pills .cl-tabs-list {
    border-bottom: none;
    gap: var(--space-2);
    background-color: var(--surface-3);
    padding: var(--space-1);
    border-radius: var(--radius-lg);
    display: inline-flex;
}
.cl-tabs-pills .cl-tab {
    border-bottom: none;
    border-radius: var(--radius-md);
    padding: var(--space-2) var(--space-4);
    height: auto;
}
.cl-tabs-pills .cl-tab.cl-tab-active {
    background-color: var(--surface-1);
    box-shadow: var(--shadow-sm);
    border-bottom-color: transparent;
}

/* ============================================================
   10. Accordion 手风琴
   ============================================================ */

.cl-accordion {
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}
.cl-accordion-item {
    border-bottom: 1px solid var(--color-border-light);
}
.cl-accordion-item:last-child {
    border-bottom: none;
}
.cl-accordion-trigger {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    padding: var(--space-4);
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-primary);
    text-align: left;
    transition: var(--transition-color);
}
.cl-accordion-trigger:hover {
    background-color: var(--surface-2);
}
.cl-accordion-trigger:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
    z-index: 1;
    position: relative;
}
.cl-accordion-icon {
    flex-shrink: 0;
    transition: transform var(--duration-normal) var(--ease-default);
    color: var(--color-text-tertiary);
}
.cl-accordion-item.cl-accordion-open .cl-accordion-icon {
    transform: rotate(180deg);
}
.cl-accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--duration-slow) var(--ease-out);
}
.cl-accordion-content-inner {
    padding: 0 var(--space-4) var(--space-4);
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: var(--leading-relaxed);
}

/* ============================================================
   11. Dropdown / Menu 下拉菜单
   ============================================================ */

.cl-dropdown {
    position: relative;
    display: inline-block;
}

.cl-dropdown-menu {
    position: absolute;
    top: calc(100% + var(--space-2));
    left: 0;
    min-width: 200px;
    background-color: var(--surface-1);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    z-index: var(--z-dropdown);
    padding: var(--space-1);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-4px);
    transition: opacity var(--duration-fast) var(--ease-default),
                transform var(--duration-fast) var(--ease-default),
                visibility var(--duration-fast);
}
.cl-dropdown.cl-dropdown-open .cl-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 右对齐 */
.cl-dropdown-menu-right {
    left: auto;
    right: 0;
}

/* 上拉 */
.cl-dropdown-menu-top {
    top: auto;
    bottom: calc(100% + var(--space-2));
    transform: translateY(4px);
}
.cl-dropdown.cl-dropdown-open .cl-dropdown-menu-top {
    transform: translateY(0);
}

.cl-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    width: 100%;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-align: left;
    transition: var(--transition-color);
}
.cl-dropdown-item:hover {
    background-color: var(--surface-3);
}
.cl-dropdown-item:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}
.cl-dropdown-item.cl-dropdown-item-danger {
    color: var(--color-error);
}
.cl-dropdown-item.cl-dropdown-item-danger:hover {
    background-color: var(--error-50);
}
.cl-dropdown-item:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

.cl-dropdown-divider {
    height: 1px;
    background-color: var(--color-border-light);
    margin: var(--space-1) 0;
}

.cl-dropdown-label {
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-semibold);
    color: var(--color-text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ============================================================
   12. Pagination 分页
   ============================================================ */

.cl-pagination {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    flex-wrap: wrap;
}

.cl-pagination-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 var(--space-2);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
    background: none;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-color);
    text-decoration: none;
}
.cl-pagination-item:hover {
    background-color: var(--surface-3);
    color: var(--color-text-primary);
}
.cl-pagination-item:focus-visible {
    outline: none;
    box-shadow: var(--focus-ring);
}
.cl-pagination-item.cl-pagination-active {
    background-color: var(--color-primary);
    color: var(--color-on-primary);
    border-color: var(--color-primary);
}
.cl-pagination-item:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}
.cl-pagination-ellipsis {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    color: var(--color-text-tertiary);
}

/* ============================================================
   13. Breadcrumb 面包屑
   ============================================================ */

.cl-breadcrumb {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-1);
    font-size: var(--text-sm);
    list-style: none;
    padding: 0;
    margin: 0;
}
.cl-breadcrumb-item {
    display: flex;
    align-items: center;
    gap: var(--space-1);
    color: var(--color-text-secondary);
}
.cl-breadcrumb-item a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: var(--transition-color);
}
.cl-breadcrumb-item a:hover {
    color: var(--color-primary);
}
.cl-breadcrumb-item.cl-breadcrumb-current {
    color: var(--color-text-primary);
    font-weight: var(--font-medium);
    pointer-events: none;
}
.cl-breadcrumb-separator {
    color: var(--color-text-tertiary);
    user-select: none;
}

/* ============================================================
   14. Tooltip 工具提示
   ============================================================ */

.cl-tooltip {
    position: absolute;
    z-index: var(--z-tooltip);
    max-width: 240px;
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--text-on-inverse);
    background-color: var(--surface-inverse);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    opacity: 0;
    visibility: hidden;
    transform: translateY(4px);
    transition: opacity var(--duration-fast) var(--ease-default),
                transform var(--duration-fast) var(--ease-default),
                visibility var(--duration-fast);
    pointer-events: none;
    word-break: break-word;
}
.cl-tooltip.cl-tooltip-visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

/* 箭头 */
.cl-tooltip::after {
    content: '';
    position: absolute;
    width: 8px;
    height: 8px;
    background-color: inherit;
    transform: rotate(45deg);
}
.cl-tooltip-top::after    { bottom: -4px; left: 50%; margin-left: -4px; }
.cl-tooltip-bottom::after { top: -4px; left: 50%; margin-left: -4px; }
.cl-tooltip-left::after   { right: -4px; top: 50%; margin-top: -4px; }
.cl-tooltip-right::after  { left: -4px; top: 50%; margin-top: -4px; }

/* ============================================================
   15. Progress / Loading 进度与加载
   ============================================================ */

/* --- 线性进度条 --- */
.cl-progress {
    width: 100%;
    height: var(--progress-height-md);
    background-color: var(--surface-3);
    border-radius: var(--radius-full);
    overflow: hidden;
}
.cl-progress-bar {
    height: 100%;
    background-color: var(--color-primary);
    border-radius: var(--radius-full);
    transition: width var(--duration-slow) var(--ease-out);
}
.cl-progress-bar.cl-progress-success { background-color: var(--color-success); }
.cl-progress-bar.cl-progress-warning { background-color: var(--color-warning); }
.cl-progress-bar.cl-progress-error   { background-color: var(--color-error); }

/* 尺寸 */
.cl-progress-sm { height: var(--progress-height-sm); }
.cl-progress-lg { height: var(--progress-height-lg); }

/* 渐变进度条 */
.cl-progress-bar-gradient {
    background: var(--gradient-primary);
}

/* 不确定进度条 */
.cl-progress-indeterminate .cl-progress-bar {
    width: 30%;
    animation: cl-progress-indeterminate var(--duration-1500) ease-in-out infinite;
}
@keyframes cl-progress-indeterminate {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(400%); }
}

/* --- 圆形进度 --- */
.cl-progress-circular {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}
.cl-progress-circular svg {
    transform: rotate(-90deg);
}
.cl-progress-circular-track {
    fill: none;
    stroke: var(--surface-3);
    stroke-width: 4;
}
.cl-progress-circular-fill {
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 4;
    stroke-linecap: round;
    transition: stroke-dashoffset var(--duration-slow) var(--ease-out);
}
.cl-progress-circular-text {
    position: absolute;
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}

/* --- Spinner --- */
.cl-spinner {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: var(--radius-full);
    animation: cl-spin var(--duration-slowest) linear infinite;
}
.cl-spinner-sm { width: 16px; height: 16px; border-width: 2px; }
.cl-spinner-lg { width: 40px; height: 40px; border-width: 4px; }

/* ============================================================
   16. Skeleton 骨架屏
   ============================================================ */

.cl-skeleton {
    display: block;
    background-color: var(--surface-3);
    border-radius: var(--radius-sm);
    animation: cl-skeleton-pulse var(--duration-1800) ease-in-out infinite;
}

@keyframes cl-skeleton-pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 预设形状 */
.cl-skeleton-text     { height: 12px; margin-bottom: var(--space-2); }
.cl-skeleton-text-sm  { height: 10px; width: 60%; }
.cl-skeleton-text-lg  { height: 16px; }
.cl-skeleton-title    { height: 24px; width: 40%; margin-bottom: var(--space-3); }
.cl-skeleton-avatar   { width: var(--avatar-size-md); height: var(--avatar-size-md); border-radius: var(--radius-full); }
.cl-skeleton-avatar-sm { width: var(--avatar-size-sm); height: var(--avatar-size-sm); border-radius: var(--radius-full); }
.cl-skeleton-button   { height: var(--btn-height-md); width: 120px; border-radius: var(--radius-md); }
.cl-skeleton-image    { width: 100%; aspect-ratio: 16/9; border-radius: var(--radius-md); }
.cl-skeleton-card     { height: 180px; border-radius: var(--card-radius); }

/* 波浪效果（更高级） */
.cl-skeleton-wave {
    background: linear-gradient(90deg,
        var(--surface-3) 25%,
        var(--surface-2) 50%,
        var(--surface-3) 75%);
    background-size: 200% 100%;
    animation: cl-skeleton-wave var(--duration-1500) ease-in-out infinite;
}
@keyframes cl-skeleton-wave {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ============================================================
   17. Avatar 头像
   ============================================================ */

.cl-avatar {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-full);
    background-color: var(--primary-100);
    color: var(--primary-700);
    font-weight: var(--font-semibold);
    overflow: hidden;
    flex-shrink: 0;
    line-height: 1;
    user-select: none;
}

/* 尺寸 */
.cl-avatar-xs { width: var(--avatar-size-xs); height: var(--avatar-size-xs); font-size: 10px; }
.cl-avatar-sm { width: var(--avatar-size-sm); height: var(--avatar-size-sm); font-size: 12px; }
.cl-avatar-md { width: var(--avatar-size-md); height: var(--avatar-size-md); font-size: var(--text-sm); }
.cl-avatar-lg { width: var(--avatar-size-lg); height: var(--avatar-size-lg); font-size: var(--text-lg); }
.cl-avatar-xl { width: var(--avatar-size-xl); height: var(--avatar-size-xl); font-size: var(--text-2xl); }
.cl-avatar-2xl { width: var(--avatar-size-2xl); height: var(--avatar-size-2xl); font-size: var(--text-4xl); }

/* 图片头像 */
.cl-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 形状变体 */
.cl-avatar-square { border-radius: var(--radius-md); }
.cl-avatar-rounded { border-radius: var(--radius-lg); }

/* 状态指示器 */
.cl-avatar-group {
    display: inline-flex;
    flex-direction: row-reverse;
}
.cl-avatar-group .cl-avatar {
    margin-left: -12px;
    border: 2px solid var(--surface-1);
}
.cl-avatar-group .cl-avatar:first-child {
    margin-left: 0;
}

/* 状态点 */
.cl-avatar-status {
    position: relative;
}
.cl-avatar-status::after {
    content: '';
    position: absolute;
    bottom: 0;
    right: 0;
    width: 30%;
    height: 30%;
    min-width: 8px;
    min-height: 8px;
    border-radius: var(--radius-full);
    border: 2px solid var(--surface-1);
    background-color: var(--color-text-tertiary);
}
.cl-avatar-status-online::after  { background-color: var(--color-success); }
.cl-avatar-status-busy::after    { background-color: var(--color-error); }
.cl-avatar-status-away::after    { background-color: var(--color-warning); }

/* ============================================================
   18. Empty State 空状态
   ============================================================ */

.cl-empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-section);
    text-align: center;
    gap: var(--space-4);
}

.cl-empty-state-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-tertiary);
    opacity: 0.6;
}

.cl-empty-state-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin: 0;
}

.cl-empty-state-description {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    max-width: 400px;
    margin: 0;
}

.cl-empty-state-actions {
    display: flex;
    gap: var(--space-3);
    margin-top: var(--space-2);
}

/* ============================================================
   19. 6态覆盖（组件级状态）
   loading / error / empty / success / unauthorized / not-found
   ============================================================ */

/* --- Loading 态 --- */
.cl-state-loading {
    position: relative;
    min-height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
}
.cl-state-loading-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-3);
    color: var(--color-text-secondary);
}
.cl-state-loading-text {
    font-size: var(--text-sm);
}

/* --- Error 态 --- */
.cl-state-error {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-section);
    text-align: center;
    gap: var(--space-3);
    color: var(--color-error);
}
.cl-state-error-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-error);
}
.cl-state-error-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}
.cl-state-error-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    max-width: 400px;
}

/* --- Empty 态 (复用 cl-empty-state) --- */

/* --- Success 态 --- */
.cl-state-success {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-section);
    text-align: center;
    gap: var(--space-3);
}
.cl-state-success-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-success);
    background-color: var(--success-50);
    border-radius: var(--radius-full);
}
.cl-state-success-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}
.cl-state-success-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* --- Unauthorized 态 --- */
.cl-state-unauthorized {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-section);
    text-align: center;
    gap: var(--space-3);
}
.cl-state-unauthorized-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-warning);
}
.cl-state-unauthorized-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}
.cl-state-unauthorized-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

/* --- Not Found 态 --- */
.cl-state-not-found {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 60vh;
    text-align: center;
    gap: var(--space-4);
}
.cl-state-not-found-code {
    font-size: var(--text-5xl);
    font-weight: var(--font-bold);
    color: var(--color-text-tertiary);
    line-height: 1;
}
.cl-state-not-found-title {
    font-size: var(--text-2xl);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
}
.cl-state-not-found-message {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    max-width: 400px;
}

/* ============================================================
   20. 工具类（组件级辅助）
   ============================================================ */

/* 文本截断 */
.cl-truncate {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}
.cl-clamp-2 {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.cl-clamp-3 {
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* 可见性 */
.cl-hidden { display: none !important; }
.cl-invisible { visibility: hidden !important; }

/* 屏幕阅读器专用 */
.cl-sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 减弱动画偏好 */
@media (prefers-reduced-motion: reduce) {
    .cl-btn,
    .cl-input,
    .cl-select,
    .cl-card,
    .cl-tab,
    .cl-dropdown-item,
    .cl-pagination-item,
    .cl-accordion-trigger,
    .cl-tooltip,
    .cl-toast,
    .cl-modal,
    .cl-modal-backdrop,
    .cl-drawer,
    .cl-skeleton,
    .cl-progress-bar {
        animation: none !important;
        transition: none !important;
    }
}