/* 通用样式 */
:root {
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --success-color: #52c41a;
    --warning-color: #faad14;
    --error-color: #f5222d;
    --info-color: #1890ff;
    
    --text-primary: #262626;
    --text-secondary: #595959;
    --text-disabled: #bfbfbf;
    
    --border-color: #d9d9d9;
    --border-light: #f0f0f0;
    
    --bg-page: #f0f2f5;
    --bg-container: #ffffff;
    --bg-hover: #f5f5f5;
    
    --shadow-1: 0 2px 8px rgba(0, 0, 0, 0.15);
    --shadow-2: 0 4px 12px rgba(0, 0, 0, 0.15);
    --shadow-3: 0 6px 16px rgba(0, 0, 0, 0.15);
    
    --radius-sm: 4px;
    --radius-md: 6px;
    --radius-lg: 8px;
    --radius-xl: 12px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-xxl: 24px;
}

/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans', sans-serif;
    font-size: 14px;
    line-height: 1.5715;
    color: var(--text-primary);
    background-color: var(--bg-page);
}

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

.font-bold { font-weight: bold; }
.font-normal { font-weight: normal; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-disabled { color: var(--text-disabled); }
.text-success { color: var(--success-color); }
.text-warning { color: var(--warning-color); }
.text-error { color: var(--error-color); }

.bg-primary { background-color: var(--primary-color); }
.bg-success { background-color: var(--success-color); }
.bg-warning { background-color: var(--warning-color); }
.bg-error { background-color: var(--error-color); }

.m-0 { margin: 0; }
.mt-1 { margin-top: var(--spacing-xs); }
.mb-1 { margin-bottom: var(--spacing-xs); }
.ml-1 { margin-left: var(--spacing-xs); }
.mr-1 { margin-right: var(--spacing-xs); }

.p-0 { padding: 0; }
.pt-1 { padding-top: var(--spacing-xs); }
.pb-1 { padding-bottom: var(--spacing-xs); }
.pl-1 { padding-left: var(--spacing-xs); }
.pr-1 { padding-right: var(--spacing-xs); }

.flex { display: flex; }
.flex-1 { flex: 1; }
.flex-center { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
}
.flex-between { 
    display: flex; 
    align-items: center; 
    justify-content: space-between; 
}
.flex-column { flex-direction: column; }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.cursor-pointer { cursor: pointer; }
.cursor-not-allowed { cursor: not-allowed; }

.border { border: 1px solid var(--border-color); }
.border-top { border-top: 1px solid var(--border-color); }
.border-bottom { border-bottom: 1px solid var(--border-color); }
.border-left { border-left: 1px solid var(--border-color); }
.border-right { border-right: 1px solid var(--border-color); }

.rounded { border-radius: var(--radius-md); }
.rounded-sm { border-radius: var(--radius-sm); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }

.shadow { box-shadow: var(--shadow-1); }
.shadow-md { box-shadow: var(--shadow-2); }
.shadow-lg { box-shadow: var(--shadow-3); }

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 32px;
    padding: 0 15px;
    font-size: 14px;
    font-weight: 400;
    line-height: 1.5715;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    user-select: none;
    touch-action: manipulation;
}

.btn:focus {
    outline: 0;
}

.btn:disabled {
    cursor: not-allowed;
    opacity: 0.6;
}

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

.btn-primary:hover:not(:disabled) {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-success {
    color: #fff;
    background-color: var(--success-color);
    border-color: var(--success-color);
}

.btn-warning {
    color: #fff;
    background-color: var(--warning-color);
    border-color: var(--warning-color);
}

.btn-danger {
    color: #fff;
    background-color: var(--error-color);
    border-color: var(--error-color);
}

.btn-default {
    color: var(--text-primary);
    background-color: #fff;
    border-color: var(--border-color);
}

.btn-default:hover:not(:disabled) {
    color: var(--primary-color);
    border-color: var(--primary-color);
}

.btn-link {
    color: var(--primary-color);
    background: transparent;
    border: none;
    text-decoration: none;
}

.btn-link:hover:not(:disabled) {
    color: var(--primary-dark);
}

.btn-sm {
    height: 24px;
    padding: 0 7px;
    font-size: 12px;
}

.btn-lg {
    height: 40px;
    padding: 0 16px;
    font-size: 16px;
}

/* 输入框样式 */
.input {
    display: inline-block;
    width: 100%;
    height: 32px;
    padding: 4px 11px;
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5715;
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all 0.3s;
}

.input:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 2px rgba(102, 126, 234, 0.2);
}

.input:disabled {
    color: var(--text-disabled);
    background-color: #f5f5f5;
    cursor: not-allowed;
}

.input-lg {
    height: 40px;
    padding: 6.5px 11px;
    font-size: 16px;
}

.input-sm {
    height: 24px;
    padding: 0 7px;
    font-size: 12px;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    background-color: #fff;
}

.table th,
.table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-light);
}

.table th {
    font-weight: 500;
    color: var(--text-primary);
    background-color: #fafafa;
}

.table tbody tr:hover {
    background-color: var(--bg-hover);
}

/* 标签样式 */
.tag {
    display: inline-block;
    padding: 0 7px;
    font-size: 12px;
    line-height: 20px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background-color: #fafafa;
    color: var(--text-primary);
}

.tag-primary {
    background-color: #e6f7ff;
    border-color: #91d5ff;
    color: #1890ff;
}

.tag-success {
    background-color: #f6ffed;
    border-color: #b7eb8f;
    color: #52c41a;
}

.tag-warning {
    background-color: #fffbe6;
    border-color: #ffe58f;
    color: #faad14;
}

.tag-error {
    background-color: #fff2f0;
    border-color: #ffccc7;
    color: #f5222d;
}

/* 加载状态 */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100px;
    color: var(--text-secondary);
    font-size: 14px;
}

.loading::before {
    content: '';
    width: 16px;
    height: 16px;
    margin-right: 8px;
    border: 2px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 空状态 */
.empty {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 120px;
    color: var(--text-disabled);
}

.empty-icon {
    font-size: 48px;
    margin-bottom: 16px;
    opacity: 0.6;
}

.empty-text {
    font-size: 14px;
}

/* 分页器样式 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 16px;
    gap: 8px;
}

.pagination-item {
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 6px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: #fff;
    color: var(--text-primary);
    cursor: pointer;
    user-select: none;
    transition: all 0.3s;
}

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

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

.pagination-item:disabled {
    border-color: var(--border-light);
    background-color: #f5f5f5;
    color: var(--text-disabled);
    cursor: not-allowed;
}

/* 模态框样式 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.45);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background-color: #fff;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-3);
    max-width: 90vw;
    max-height: 90vh;
    overflow: hidden;
}

.modal-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
}

.modal-close {
    padding: 0;
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    color: var(--text-secondary);
}

.modal-body {
    padding: 24px;
}

.modal-footer {
    padding: 10px 16px;
    border-top: 1px solid var(--border-light);
    text-align: right;
}

.modal-footer .btn + .btn {
    margin-left: 8px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .btn {
        height: 36px;
        padding: 0 12px;
    }
    
    .input {
        height: 36px;
        padding: 6px 12px;
    }
    
    .table th,
    .table td {
        padding: 8px 12px;
    }
    
    .modal {
        margin: 16px;
        max-width: calc(100vw - 32px);
    }
    
    .modal-body {
        padding: 16px;
    }
}