/**
 * 年级分班系统 - 高端UI设计样式
 * 现代化、扁平化设计风格，注重用户体验和视觉效果
 */

/* CSS变量定义 */
:root {
    /* 主色调 */
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-light: #e8edff;
    --primary-dark: #4c5fd5;
    
    /* 辅助色 */
    --secondary-color: #f093fb;
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    
    /* 功能色 */
    --success-color: #10b981;
    --success-light: #d1fae5;
    --warning-color: #f59e0b;
    --warning-light: #fef3c7;
    --error-color: #ef4444;
    --error-light: #fee2e2;
    --info-color: #3b82f6;
    --info-light: #dbeafe;
    
    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    
    /* 背景色 */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-accent: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    
    /* 文字色 */
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --text-light: #9ca3af;
    --text-white: #ffffff;
    
    /* 阴影 */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
    
    /* 边框半径 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    
    /* 动画 */
    --transition-fast: 0.15s ease-out;
    --transition-normal: 0.25s ease-out;
    --transition-slow: 0.35s ease-out;
    
    /* 字体 */
    --font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    --font-mono: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

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

html {
    height: 100%;
    scroll-behavior: smooth;
}

body {
    min-height: 100vh;
    font-family: var(--font-family);
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-secondary);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
}

/* 隐藏类 */
.hidden {
    display: none !important;
}

/* 容器 */
.container {
    max-width: 1900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 页面头部样式 */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 70px;
}

.title {
    font-size: 24px;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    display: flex;
    align-items: center;
    gap: 12px;
}

.title i {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 用户信息区域 */
.user-info {
    display: flex;
    align-items: center;
}

.login-btn {
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.login-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.user-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.user-avatar img {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--primary-light);
}

.user-details {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.user-nickname {
    font-weight: 500;
    font-size: 14px;
    color: var(--text-primary);
}

.logout-btn {
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-size: 12px;
    cursor: pointer;
    transition: color var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 4px;
}

.logout-btn:hover {
    color: var(--error-color);
}

/* 主内容区域样式 */
.main {
    min-height: calc(100vh - 70px);
    padding: 0 0 40px;
}

/* 区域间距 */
section {
    margin-bottom: 40px;
}

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

/* 卡片基础样式 */
.upload-card,
.data-card,
.assign-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--gray-100);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.upload-card:hover,
.data-card:hover,
.assign-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* 文件上传区域样式 */
.upload-header {
    padding: 30px 30px 0;
}

.upload-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.upload-header h2 i {
    color: var(--primary-color);
}

.upload-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

.upload-area {
    flex: 1;
    margin: 30px;
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-xl);
    background: var(--gray-50);
    transition: all var(--transition-normal);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
}

.upload-area.drag-over {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: scale(1.02);
}

.upload-area.uploading {
    cursor: not-allowed;
    opacity: 0.7;
}

.upload-content {
    padding: 20px 30px;
    text-align: center;
    transition: all var(--transition-normal);
}

.upload-icon {
    font-size: 36px;
    color: var(--primary-color);
    margin-bottom: 15px;
    display: block;
}

.upload-text {
    font-size: 16px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.upload-hint {
    font-size: 14px;
    color: var(--text-secondary);
}

.upload-loading {
    padding: 40px 30px;
    text-align: center;
    color: var(--primary-color);
}

.upload-loading i {
    font-size: 32px;
    margin-bottom: 15px;
    display: block;
}

.upload-loading p {
    font-weight: 500;
}

.upload-info {
    padding: 20px 30px 30px;
    border-top: 1px solid var(--gray-100);
    background: var(--gray-50);
}

.file-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.file-info span {
    color: var(--text-secondary);
    font-size: 14px;
}

.reselect-btn {
    background: transparent;
    color: var(--error-color);
    border: 1px solid var(--primary-color);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

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

/* 数据区域样式 */
.data-header {
    padding: 30px 30px 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 20px;
}

.data-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.data-header h2 i {
    color: var(--primary-color);
}

.data-actions {
    display: flex;
    align-items: center;
    gap: 15px;
}

.search-box {
    position: relative;
}

.search-input {
    background: var(--bg-secondary);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    padding: 10px 40px 10px 16px;
    font-size: 14px;
    width: 250px;
    transition: all var(--transition-normal);
}

.search-input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.search-box i {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-light);
    pointer-events: none;
}

.clear-btn {
    background: transparent;
    color: var(--text-secondary);
    border: 1px solid var(--gray-200);
    padding: 10px 16px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    gap: 6px;
}

.clear-btn:hover {
    border-color: var(--error-color);
    color: var(--error-color);
}

/* 数据统计 */
.data-stats {
    padding: 20px 30px;
    background: var(--gray-50);
    border-top: 1px solid var(--gray-100);
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.stat-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-value {
    font-size: 14px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
}

.stat-value.status-found {
    background: var(--success-light);
    color: var(--success-color);
}

.stat-value.status-not-found {
    background: var(--warning-light);
    color: var(--warning-color);
}

.stat-value.status-valid {
    background: var(--success-light);
    color: var(--success-color);
}

.stat-value.status-invalid {
    background: var(--error-light);
    color: var(--error-color);
}

.stat-value.status-pending {
    background: var(--info-light);
    color: var(--info-color);
}

/* 数据验证错误提示样式 */
.validation-error-tip {
    margin: 0 30px 20px;
    padding: 16px 20px;
    background: linear-gradient(135deg, var(--error-light) 0%, rgba(254, 226, 226, 0.8) 100%);
    border: 1px solid var(--error-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    animation: slideInDown var(--transition-normal);
}

.error-tip-content {
    display: flex;
    align-items: center;
    gap: 12px;
    color: var(--error-color);
}

.error-tip-content i {
    font-size: 18px;
    color: var(--error-color);
    animation: pulse 2s infinite;
}

.error-message {
    font-size: 14px;
    font-weight: 500;
    line-height: 1.5;
    flex: 1;
}

/* 验证错误提示动画 */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.05);
    }
}

/* 表格容器 */
.table-container {
    max-height: 600px;
    overflow: auto;
    margin: 0 30px 30px;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    background: var(--bg-primary);
}

.data-table thead {
    background: var(--gray-50);
    position: sticky;
    top: 0;
    z-index: 10;
}

.data-table th {
    padding: 15px 12px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--gray-200);
    position: relative;
}

.data-table th:first-child {
    padding-left: 20px;
}

.data-table th:last-child {
    padding-right: 20px;
}

.col-gender {
    background: linear-gradient(135deg, #f093fb10, #f5576c10);
}

.col-score {
    background: linear-gradient(135deg, #667eea10, #764ba210);
}

.col-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.gender-badge {
    background: var(--secondary-gradient);
    color: var(--text-white);
}

.score-badge {
    background: var(--primary-gradient);
    color: var(--text-white);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--gray-100);
    transition: all var(--transition-fast);
    position: relative;
}

.data-table td:first-child {
    padding-left: 20px;
}

.data-table td:last-child {
    padding-right: 20px;
}

.data-table tbody tr:hover {
    background: var(--primary-light);
}

.cell-index {
    font-weight: 500;
    color: var(--text-secondary);
    background: var(--gray-50);
}

.cell-normal {
    cursor: pointer;
}

.cell-normal:hover {
    background: var(--info-light);
}

.cell-error {
    background: var(--error-light) !important;
    color: var(--error-color);
    cursor: pointer;
    position: relative;
}

.cell-error-icon {
    position: absolute;
    top: 4px;
    right: 4px;
    font-size: 10px;
}

.cell-input {
    width: 100%;
    border: 2px solid var(--primary-color);
    border-radius: var(--radius-sm);
    padding: 6px 8px;
    font-size: 13px;
    background: var(--bg-primary);
    outline: none;
}

.cell-actions {
    text-align: center;
}

.btn-delete {
    background: transparent;
    color: var(--text-light);
    border: none;
    padding: 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-delete:hover {
    color: var(--error-color);
    background: var(--error-light);
}

/* 标签列样式 */
.col-tags {
    min-width: 200px;
}

.cell-tags {
    padding: 8px 12px !important;
}

.tags-display {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    min-height: 28px;
}

.tag-item {
    display: flex;
    align-items: center;
    background: var(--primary-gradient);
    color: var(--text-white);
    padding: 4px 8px;
    border-radius: var(--radius-md);
    font-size: 11px;
    font-weight: 500;
    gap: 4px;
    animation: tagFadeIn 0.2s ease-out;
}

.tag-remove {
    background: transparent;
    border: none;
    color: var(--text-white);
    cursor: pointer;
    font-size: 12px;
    font-weight: bold;
    line-height: 1;
    padding: 0 2px;
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.tag-remove:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.btn-add-tag {
    background: transparent;
    border: 1px dashed var(--gray-300);
    color: var(--text-secondary);
    padding: 4px 6px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 11px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    min-height: 20px;
}

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

/* 标签选择器模态框样式 */
.tag-selector-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: modalFadeIn var(--transition-normal);
}

.tag-selector-content {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 500px;
    width: 90%;
    max-height: 80vh;
    overflow: hidden;
    animation: modalSlideIn var(--transition-normal);
}

.tag-selector-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-50);
}

.tag-selector-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.tag-selector-body {
    padding: 25px;
    max-height: calc(80vh - 200px);
    overflow-y: auto;
}

.tags-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.tag-option {
    background: var(--gray-100);
    border: 1px solid var(--gray-200);
    color: var(--text-primary);
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 13px;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tag-option:hover {
    border-color: var(--primary-color);
    background: var(--primary-light);
    transform: translateY(-1px);
}

.tag-option.selected {
    background: var(--primary-gradient);
    color: var(--text-white);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.tag-option.selected::after {
    content: '✓';
    font-weight: bold;
}

.custom-tag-input {
    display: flex;
    gap: 10px;
    align-items: center;
    padding-top: 15px;
    border-top: 1px solid var(--gray-100);
}

.custom-tag-input input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    font-size: 13px;
    transition: all var(--transition-normal);
}

.custom-tag-input input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.btn-add-custom {
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-add-custom:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

/* 标签动画 */
@keyframes tagFadeIn {
    from {
        opacity: 0;
        transform: scale(0.8);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 分班设置区域样式 */
.assign-header {
    padding: 30px;
    border-bottom: 1px solid var(--gray-100);
}

.assign-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.assign-header h2 i {
    color: var(--success-color);
}

.assign-desc {
    color: var(--text-secondary);
    font-size: 14px;
}

.assign-content {
    padding: 30px;
}

.coming-soon {
    text-align: center;
    padding: 60px 30px;
    color: var(--text-secondary);
}

.coming-soon i {
    font-size: 48px;
    margin-bottom: 15px;
    display: block;
    color: var(--warning-color);
}

/* 模态框样式 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: modalFadeIn var(--transition-normal);
}

.modal-content {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    max-width: 400px;
    width: 90%;
    max-height: 90vh;
    overflow: hidden;
    animation: modalSlideIn var(--transition-normal);
}

.modal-header {
    padding: 25px 30px;
    border-bottom: 1px solid var(--gray-100);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-50);
}

.modal-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 6px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.close-btn:hover {
    background: var(--gray-200);
    color: var(--text-primary);
}

.modal-body {
    padding: 40px 30px;
    text-align: center;
}

.qrcode-container {
    margin-bottom: 20px;
}

.qrcode-image {
    max-width: 200px;
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.qrcode-loading,
.qrcode-error,
.qrcode-expired {
    padding: 40px 20px;
    color: var(--text-secondary);
}

.qrcode-loading i,
.qrcode-error i,
.qrcode-expired i {
    font-size: 32px;
    margin-bottom: 15px;
    display: block;
}

.qrcode-status {
    margin-top: 15px;
    padding: 8px 16px;
    border-radius: var(--radius-lg);
    font-size: 13px;
    font-weight: 500;
    background: var(--info-light);
    color: var(--info-color);
}

.qrcode-status.status-scanned {
    background: var(--warning-light);
    color: var(--warning-color);
}

.qrcode-status.status-expired {
    background: var(--error-light);
    color: var(--error-color);
}

.login-tip {
    color: var(--text-secondary);
    font-size: 14px;
}

.retry-btn,
.refresh-btn {
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    padding: 10px 20px;
    border-radius: var(--radius-lg);
    font-size: 14px;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.retry-btn:hover,
.refresh-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* 消息提示样式 */
.message-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1100;
    max-width: 350px;
}

.message {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    margin-bottom: 10px;
    padding: 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-left: 4px solid;
    transform: translateX(100%);
    transition: all var(--transition-normal);
}

.message:not(.message-enter):not(.message-leave) {
    transform: translateX(0);
}

.message.message-leave {
    transform: translateX(100%);
    opacity: 0;
}

.message-success {
    border-left-color: var(--success-color);
    background: var(--success-light);
}

.message-error {
    border-left-color: var(--error-color);
    background: var(--error-light);
}

.message-warning {
    border-left-color: var(--warning-color);
    background: var(--warning-light);
}

.message-info {
    border-left-color: var(--info-color);
    background: var(--info-light);
}

.message-content {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
}

.message-success .message-content {
    color: var(--success-color);
}

.message-error .message-content {
    color: var(--error-color);
}

.message-warning .message-content {
    color: var(--warning-color);
}

.message-info .message-content {
    color: var(--info-color);
}

.message-close {
    background: transparent;
    border: none;
    color: inherit;
    cursor: pointer;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-fast);
    margin-left: 10px;
    flex-shrink: 0;
}

.message-close:hover {
    background: rgba(0, 0, 0, 0.1);
}

/* 动画定义 */
@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

.fa-spin {
    animation: spin 1s linear infinite;
}

/* 响应式设计 */

/* 平板设备 */
@media (max-width: 1024px) {
    .container {
        padding: 0 16px;
    }
    
    .data-actions {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .search-input {
        width: 200px;
    }
    
    .data-stats {
        gap: 20px;
    }
    
    .validation-error-tip {
        margin: 0 20px 15px;
        padding: 14px 16px;
    }
    
    .error-tip-content i {
        font-size: 16px;
    }
    
    .error-message {
        font-size: 13px;
    }
}

/* 手机设备 */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        gap: 15px;
        min-height: auto;
        padding: 15px 16px;
    }
    
    .title {
        font-size: 20px;
    }
    
    .main {
        padding: 20px 0;
    }
    
    .upload-content {
        padding: 30px 20px;
    }
    
    .upload-icon {
        font-size: 36px;
    }
    
    .data-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
        padding: 20px 20px 0;
    }
    
    .data-stats {
        padding: 15px 20px;
        flex-direction: column;
        gap: 15px;
    }
    
    .validation-error-tip {
        margin: 0 20px 15px;
        padding: 14px 16px;
    }
    
    .error-tip-content i {
        font-size: 16px;
    }
    
    .error-message {
        font-size: 13px;
    }
    
    .table-container {
        margin: 0 20px 20px;
    }
    
    .data-table {
        font-size: 12px;
    }
    
    .data-table th,
    .data-table td {
        padding: 8px 6px;
    }
    
    .data-table th:first-child,
    .data-table td:first-child {
        padding-left: 10px;
    }
    
    .data-table th:last-child,
    .data-table td:last-child {
        padding-right: 10px;
    }
    
    .search-input {
        width: 100%;
    }
    
    .file-info {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .modal-content {
        margin: 20px;
        width: calc(100% - 40px);
    }
    
    .modal-header {
        padding: 20px;
    }
    .modal-body {
        padding: 30px 20px;
    }
    .message-container {
        right: 10px;
        left: 10px;
        max-width: none;
    }
}

/* 超小屏设备 */
@media (max-width: 480px) {
    .container {
        padding: 0 12px;
    }
    
    .title {
        font-size: 18px;
    }
    
    .upload-header,
    .data-header,
    .assign-header {
        padding: 15px 15px 0;
    }
    
    .upload-area {
        margin: 20px 15px;
    }
    
    .upload-content {
        padding: 25px 15px;
    }
    
    .table-container {
        margin: 0 15px 15px;
    }
    
    .validation-error-tip {
        margin: 0 15px 15px;
        padding: 12px 14px;
    }
    
    .error-message {
        font-size: 12px;
    }
    
    .data-stats {
        padding: 15px;
    }
    
    .assign-content {
        padding: 20px 15px;
    }
    
    .coming-soon {
        padding: 40px 15px;
    }
}

/* 打印样式 */
@media print {
    .header,
    .upload-section,
    .assign-section,
    .modal,
    .message-container {
        display: none !important;
    }
    
    .main {
        padding: 0;
    }
    
    .upload-card,
    .data-card,
    .assign-card {
        box-shadow: none;
        border: 1px solid var(--gray-300);
    }
    
    .table-container {
        max-height: none;
        overflow: visible;
    }
    
    .data-table {
        break-inside: auto;
    }
    
    .data-table tr {
        break-inside: avoid;
        break-after: auto;
    }
}

/* 高对比度模式适配 */
@media (prefers-contrast: high) {
    :root {
        --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
    }
    
    .data-table th,
    .data-table td {
        border: 1px solid var(--gray-400);
    }
}

/* 减少动画（accessibility） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* 聚焦可见性 */
*:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* =================================================================
   分班设置区域样式
   ================================================================= */

/* 班级数量设置 */
.class-count-section {
    margin-bottom: 20px;
    padding: 20px;
    background: var(--bg-primary);
    border-radius: 8px;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--gray-100);
}

.class-count-section h3 {
    display: flex;
    align-items: center;
    margin: 0 0 15px 0;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.class-count-section h3 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.class-count-input {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.class-count-input label {
    font-weight: 500;
    color: var(--text-primary);
    min-width: 80px;
}

.class-count-input .form-input {
    width: 100px;
    padding: 8px 12px;
    border: 1px solid var(--gray-200);
    border-radius: 6px;
    font-size: 14px;
    text-align: center;
    transition: all 0.3s ease;
}

.class-count-input .form-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.class-count-input .input-suffix {
    color: var(--text-secondary);
    font-weight: 500;
}

.help-text {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
    margin: 0;
    margin-top: 8px;
}

/* 约束条件设置 */
.constraints-section {
    margin-bottom: 30px;
}

.constraints-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.constraints-header h3 {
    display: flex;
    align-items: center;
    margin: 0;
    color: var(--text-primary);
    font-size: 16px;
    font-weight: 600;
}

.constraints-header h3 i {
    margin-right: 10px;
    color: var(--primary-color);
}

.add-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--primary-gradient);
    color: var(--text-white);
    border: none;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.add-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.add-btn:active {
    transform: translateY(0);
}

/* 约束条件列表 */
.constraints-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.constraint-item {
    background: var(--bg-primary);
    border: 1px solid var(--gray-100);
    border-radius: 8px;
    padding: 16px;
    transition: all 0.3s ease;
}

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

.constraint-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 8px;
}

.constraint-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex: 1;
}

.constraint-icon {
    color: var(--primary-color);
    font-size: 18px;
}

.constraint-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.constraint-summary {
    color: var(--text-secondary);
    font-size: 12px;
    background: var(--gray-50);
    padding: 3px 6px;
    border-radius: 4px;
}

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

.edit-constraint-btn,
.delete-constraint-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 14px;
}

.edit-constraint-btn {
    background: var(--info-light);
    color: var(--info-color);
}

.edit-constraint-btn:hover {
    background: var(--info-color);
    color: var(--text-white);
}

.delete-constraint-btn {
    background: var(--error-light);
    color: var(--error-color);
}

.delete-constraint-btn:hover {
    background: var(--error-color);
    color: var(--text-white);
}

.constraint-description {
    color: var(--text-secondary);
    font-size: 12px;
    line-height: 1.4;
    margin-left: 26px;
}

/* 分班操作按钮 */
.assign-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    padding-top: 16px;
    border-top: 1px solid var(--gray-200);
}

.btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
    min-width: 120px;
    justify-content: center;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn:active {
    transform: translateY(0);
}

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

.btn-secondary {
    background: var(--gray-100);
    color: var(--text-primary);
    border: 2px solid var(--gray-200);
}

.btn-secondary:hover {
    background: var(--gray-200);
    border-color: var(--gray-300);
}

/* =================================================================
   约束条件配置弹窗样式
   ================================================================= */

#constraint-modal .modal-content {
    max-width: 700px;
    width: 90vw;
    max-height: 90vh;
    overflow-y: auto;
}

#constraint-modal .modal-body {
    min-height: 200px;
    max-height: 60vh;
    overflow-y: auto;
}

#constraint-modal .modal-footer {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    padding: 20px 30px;
    background: var(--gray-50);
    border-radius: 0 0 12px 12px;
    border-top: 1px solid var(--gray-200);
    margin-top: auto;
}

.constraint-type-selector {
    margin-bottom: 25px;
}

.constraint-type-selector label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-select {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
}

.form-select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

.constraint-config {
    border-top: 1px solid var(--gray-200);
    padding-top: 25px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 16px;
    transition: all 0.3s ease;
}

.form-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

/* 单选按钮组 */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    padding: 10px 15px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.radio-item:hover {
    background: var(--gray-50);
}

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

.radio-item span {
    font-size: 15px;
    color: var(--text-primary);
}

/* 信息提示项 */
.info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 15px;
    background: var(--info-light);
    border-radius: 8px;
    color: var(--info-color);
}

.info-item i {
    font-size: 16px;
}

/* 自定义人数配置 */
.input-group {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.input-group label {
    min-width: 60px;
    font-weight: 500;
    margin-bottom: 0;
}

.input-group input {
    width: 100px;
    padding: 8px 12px;
    border: 2px solid var(--gray-200);
    border-radius: 6px;
    text-align: center;
}

.input-group input:focus {
    border-color: var(--primary-color);
}

.input-group span {
    color: var(--text-secondary);
    font-size: 14px;
}

.total-display {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    background: var(--gray-50);
    border-radius: 8px;
    margin-top: 15px;
    font-weight: 500;
}

.total-display .correct {
    color: var(--success-color);
}

.total-display .incorrect {
    color: var(--error-color);
}

.target-size {
    color: var(--text-secondary);
    font-size: 14px;
}

/* 可搜索选择器 - Autocomplete */
.autocomplete-container {
    position: relative;
    width: 100%;
}

.autocomplete-input-wrapper {
    position: relative;
    width: 100%;
}

.autocomplete-input {
    width: 100%;
    padding: 12px 45px 12px 15px;
    border: 2px solid var(--gray-200);
    border-radius: 8px;
    font-size: 16px;
    background: var(--bg-primary);
    transition: all 0.3s ease;
    box-sizing: border-box;
}

.autocomplete-input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
    outline: none;
}

.autocomplete-icon {
    position: absolute;
    right: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.autocomplete-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--bg-primary);
    border: 2px solid var(--gray-200);
    border-top: none;
    border-radius: 0 0 8px 8px;
    box-shadow: var(--shadow-lg);
    max-height: 300px;
    overflow-y: auto;
}

.autocomplete-dropdown.hidden {
    display: none;
}

.autocomplete-loading,
.autocomplete-no-results {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 20px;
    color: var(--text-secondary);
    font-size: 14px;
}

.autocomplete-loading.hidden,
.autocomplete-no-results.hidden {
    display: none;
}

.autocomplete-results {
    max-height: 280px;
    overflow-y: auto;
}

.autocomplete-item {
    padding: 12px 15px;
    cursor: pointer;
    border-bottom: 1px solid var(--gray-100);
    transition: all 0.2s ease;
}

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

.autocomplete-item:hover,
.autocomplete-item.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.autocomplete-item-main {
    font-weight: 500;
    margin-bottom: 4px;
}

.autocomplete-item-extra {
    font-size: 12px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.autocomplete-item:hover .autocomplete-item-extra,
.autocomplete-item.active .autocomplete-item-extra {
    color: var(--primary-color);
    opacity: 0.8;
}

/* 响应式适配 - 分班设置 */
@media (max-width: 768px) {
    .constraints-header {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    
    .constraint-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
    
    .constraint-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .constraint-actions {
        align-self: flex-end;
    }
    
    .assign-actions {
        flex-direction: column;
    }
    
    .class-count-input {
        flex-direction: column;
        align-items: flex-start;
        gap: 8px;
    }
    
    .radio-group {
        gap: 8px;
    }
    
    .input-group {
        flex-wrap: wrap;
        gap: 8px;
    }
    
    #constraint-modal .modal-content {
        margin: 10px;
        width: calc(100vw - 20px);
    }
}

/* ============================================= */
/* 分班进度界面样式 */
/* ============================================= */

/* 分班进度弹窗样式 */
#assign-progress-modal .assign-progress-content {
    width: 90vw;
    max-width: 800px;
    max-height: 90vh;
    overflow-y: auto;
}

#assign-progress-modal .modal-header h3 {
    color: var(--primary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

#assign-progress-modal .modal-header h3 i {
    animation: spin 2s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* 进度区域样式 */
.progress-section {
    margin-bottom: 24px;
    padding: 20px;
    background: var(--gray-50);
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.phase-info {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 500;
}

.phase-label {
    color: var(--text-secondary);
}

#assign-phase-text {
    color: var(--primary-color);
    font-weight: 600;
}

.progress-percentage {
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.progress-bar-container {
    margin-bottom: 12px;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--gray-200);
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--primary-gradient);
    width: 0%;
    transition: width var(--transition-normal);
    border-radius: 4px;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    background-image: linear-gradient(
        -45deg,
        rgba(255, 255, 255, 0.2) 25%,
        transparent 25%,
        transparent 50%,
        rgba(255, 255, 255, 0.2) 50%,
        rgba(255, 255, 255, 0.2) 75%,
        transparent 75%,
        transparent
    );
    background-size: 20px 20px;
    animation: progress-stripes 1s linear infinite;
}

@keyframes progress-stripes {
    0% { background-position: 0 0; }
    100% { background-position: 20px 0; }
}

.progress-message {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 分班提示样式 */
.progress-tips {
    margin-top: 16px;
    padding: 12px;
    background: linear-gradient(135deg, #f8f9ff, #e8f2ff);
    border: 1px solid #d1e7ff;
    border-radius: 8px;
}

.tip-item {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    font-size: 13px;
    color: #4a5568;
}

.tip-item:last-child {
    margin-bottom: 0;
}

.tip-item i {
    color: #3182ce;
    margin-right: 8px;
    font-size: 14px;
    width: 16px;
    flex-shrink: 0;
}

/* 统计区域样式 */
.statistics-section {
    margin-bottom: 24px;
    padding: 16px 20px;
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
}

.stat-item {
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 12px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.stat-value {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 日志区域样式 */
.log-section {
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.log-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.log-header h4 {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.log-container {
    height: 200px;
    overflow-y: auto;
    padding: 12px;
    background: var(--gray-900);
    font-family: var(--font-mono);
    font-size: 12px;
    line-height: 1.4;
}

.log-item {
    display: flex;
    align-items: flex-start;
    gap: 8px;
    margin-bottom: 4px;
    padding: 4px 0;
}

.log-time {
    color: var(--gray-400);
    min-width: 80px;
    font-size: 11px;
}

.log-icon {
    min-width: 16px;
    text-align: center;
}

.log-message {
    flex: 1;
    word-break: break-word;
}

/* 日志级别颜色 */
.log-info .log-icon { color: var(--info-color); }
.log-info .log-message { color: #e5e7eb; }

.log-success .log-icon { color: var(--success-color); }
.log-success .log-message { color: #d1fae5; }

.log-warning .log-icon { color: var(--warning-color); }
.log-warning .log-message { color: #fef3c7; }

.log-error .log-icon { color: var(--error-color); }
.log-error .log-message { color: #fee2e2; }

/* 停止按钮样式 */
#stop-assign-btn {
    background: var(--warning-color);
    border-color: var(--warning-color);
}

#stop-assign-btn:hover {
    background: #d97706;
    border-color: #d97706;
}

#stop-assign-btn:disabled {
    background: var(--gray-400);
    border-color: var(--gray-400);
    cursor: not-allowed;
}

/* ============================================= */
/* 分班结果界面样式 */
/* ============================================= */

/* 结果弹窗样式 */
#assign-result-modal .assign-result-content {
    width: 90vw;
    max-width: 900px;
    max-height: 90vh;
    overflow-y: auto;
}

#assign-result-modal .modal-header h3 {
    color: var(--success-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 结果摘要样式 */
.result-summary {
    margin-bottom: 32px;
    padding: 24px;
    background: linear-gradient(135deg, var(--success-light) 0%, #ecfdf5 100%);
    border-radius: var(--radius-xl);
    border: 1px solid var(--success-color);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 20px;
}

.summary-item {
    text-align: center;
    padding: 16px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.summary-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--success-color);
    margin-bottom: 4px;
}

.summary-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* 结果详情样式 */
.result-details {
    margin-bottom: 32px;
}

.result-details h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.class-distribution {
    display: grid;
    gap: 12px;
}

.class-item {
    padding: 16px;
    background: white;
    border-radius: var(--radius-lg);
    border: 1px solid var(--gray-200);
    box-shadow: var(--shadow-sm);
}

.class-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.class-name {
    font-weight: 600;
    color: var(--primary-color);
    font-size: 14px;
}

.class-count {
    font-size: 12px;
    color: var(--text-secondary);
}

.class-progress {
    height: 4px;
    background: var(--gray-200);
    border-radius: 2px;
    overflow: hidden;
}

.class-progress-bar {
    height: 100%;
    background: var(--primary-gradient);
    border-radius: 2px;
    transition: width var(--transition-normal);
}

/* 质量评估样式 */
.result-quality {
    padding: 20px;
    background: linear-gradient(135deg, var(--info-light) 0%, #e0f2fe 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--info-color);
}

.result-quality h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--info-color);
    margin-bottom: 12px;
}

.quality-score {
    font-size: 16px;
    color: var(--text-primary);
}

.quality-score strong {
    font-size: 20px;
    color: var(--info-color);
}

/* ============================================= */
/* 班级标识样式 */
/* ============================================= */

.class-column {
    background: var(--gray-50);
    text-align: center;
    vertical-align: middle;
    padding: 8px 12px !important;
}

.class-column .column-name {
    font-weight: 600;
    color: var(--primary-color);
}

.class-badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 8px;
    border-radius: var(--radius-md);
    font-size: 12px;
    font-weight: 600;
    text-align: center;
    min-width: 50px;
    justify-content: center;
}

.class-badge.unassigned {
    background: var(--gray-200);
    color: var(--text-secondary);
}

/* 班级颜色主题 */
.class-badge.class-1 { 
    background: linear-gradient(135deg, #ff6b6b 0%, #ff8787 100%);
    color: white;
}

.class-badge.class-2 { 
    background: linear-gradient(135deg, #4ecdc4 0%, #6bcf7f 100%);
    color: white;
}

.class-badge.class-3 { 
    background: linear-gradient(135deg, #45b7d1 0%, #96ceb4 100%);
    color: white;
}

.class-badge.class-4 { 
    background: linear-gradient(135deg, #f9ca24 0%, #f0932b 100%);
    color: white;
}

.class-badge.class-5 { 
    background: linear-gradient(135deg, #eb4d4b 0%, #f8b500 100%);
    color: white;
}

.class-badge.class-6 { 
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    color: white;
}

.class-badge.class-7 { 
    background: linear-gradient(135deg, #fd79a8 0%, #e17055 100%);
    color: white;
}

.class-badge.class-8 { 
    background: linear-gradient(135deg, #00b894 0%, #00cec9 100%);
    color: white;
}

.class-badge.class-9 { 
    background: linear-gradient(135deg, #e17055 0%, #fdcb6e 100%);
    color: white;
}

.class-badge.class-10 { 
    background: linear-gradient(135deg, #a29bfe 0%, #74b9ff 100%);
    color: white;
}

/* 更多班级使用循环色彩 */
.class-badge:not(.unassigned):not([class*="class-"]) {
    background: var(--primary-gradient);
    color: white;
}

/* ============================================= */
/* 响应式设计优化 */
/* ============================================= */

@media (max-width: 768px) {
    #assign-progress-modal .assign-progress-content,
    #assign-result-modal .assign-result-content {
        width: 95vw;
        margin: 20px auto;
    }
    
    .summary-grid,
    .stat-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .log-container {
        height: 150px;
        font-size: 11px;
    }
    
    .result-summary {
        padding: 16px;
    }
    
    .class-item {
        padding: 12px;
    }
    
    .class-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 4px;
    }
}

/* ===========================
   分班结果展示区域样式
   =========================== */

.result-section {
    margin: 30px 0;
    background: var(--bg-primary);
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
}

.result-section.hidden {
    display: none;
}

.result-card {
    width: 100%;
}

.result-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    background: linear-gradient(135deg, var(--success-color), var(--success-dark));
    color: white;
    border-bottom: 1px solid var(--gray-200);
}

.result-header h2 {
    margin: 0;
    font-size: 24px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 12px;
}

.result-header h2 i {
    font-size: 28px;
}

.result-actions {
    display: flex;
    gap: 12px;
}

.result-actions .btn {
    background: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: white;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.result-actions .btn:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-2px);
}

/* 约束满足情况样式 */
.constraints-satisfaction {
    padding: 30px;
    border-bottom: 1px solid var(--gray-200);
}

/* 约束条件满足情况表格样式 */
.constraints-table-container {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.constraints-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.constraints-table thead {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
}

.constraints-table th {
    padding: 16px 20px;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
    border-bottom: 2px solid var(--gray-200);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.constraints-table tbody tr {
    border-bottom: 1px solid var(--gray-100);
    transition: background-color 0.2s ease;
}

.constraints-table tbody tr:hover {
    background-color: var(--gray-50);
}

.constraints-table tbody tr:last-child {
    border-bottom: none;
}

.constraints-table td {
    padding: 16px 20px;
    vertical-align: middle;
}

.constraints-table .constraint-name {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 120px;
}

.constraints-table .constraint-description {
    color: var(--text-secondary);
    line-height: 1.4;
    max-width: 250px;
}

.constraints-table .constraint-status {
    display: flex;
    align-items: center;
    justify-content: center;
}

.constraint-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    min-width: 80px;
    justify-content: center;
}

.constraint-status-badge.satisfied {
    background: var(--success-bg);
    color: var(--success-color);
}

.constraint-status-badge.unsatisfied {
    background: var(--error-bg);
    color: var(--error-color);
}

.constraint-status-badge.partial {
    background: var(--warning-bg);
    color: var(--warning-color);
}

.constraint-satisfaction-score {
    font-weight: 600;
    font-size: 16px;
    text-align: center;
}

.constraint-satisfaction-score.high {
    color: var(--success-color);
}

.constraint-satisfaction-score.medium {
    color: var(--warning-color);
}

.constraint-satisfaction-score.low {
    color: var(--error-color);
}

.constraint-details-cell {
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
    max-width: 200px;
}

.constraint-type-badge {
    display: inline-block;
    padding: 4px 8px;
    background: var(--primary-bg);
    color: var(--primary-color);
    border-radius: 6px;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* 约束条件表格响应式样式 */
@media (max-width: 768px) {
    .constraints-table-container {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    .constraints-table {
        min-width: 800px;
    }
    
    .constraints-table th,
    .constraints-table td {
        padding: 12px 16px;
        font-size: 13px;
    }
    
    .constraint-type-badge {
        padding: 3px 6px;
        font-size: 10px;
    }
    
    .constraint-status-badge {
        padding: 5px 10px;
        font-size: 11px;
    }
    
    .constraint-satisfaction-score {
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .constraints-satisfaction {
        padding: 20px 16px;
    }
    
    .constraints-table th,
    .constraints-table td {
        padding: 10px 12px;
        font-size: 12px;
    }
    
    .constraints-table .constraint-description,
    .constraint-details-cell {
        max-width: 150px;
        word-wrap: break-word;
    }
}

.constraints-satisfaction h3 {
    margin: 0 0 24px 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.satisfaction-summary {
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 24px;
    border: 1px solid var(--gray-200);
}

.satisfaction-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

/* 横向布局的约束满足概况样式 */
.summary-metrics-horizontal {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    padding: 16px 24px;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-radius: 12px;
    border: 1px solid rgba(102, 126, 234, 0.2);
    margin: 16px 0;
    flex-wrap: wrap;
}

.summary-metrics-horizontal .metric-card {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0;
    background: transparent;
    border: none;
    box-shadow: none;
}

.summary-metrics-horizontal .metric-label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 0;
}

.summary-metrics-horizontal .metric-value {
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-color);
    display: inline;
    margin-bottom: 0;
}

.summary-metrics-horizontal .metric-value.metric-success {
    color: var(--success-color);
}

.summary-metrics-horizontal .metric-divider {
    font-size: 18px;
    font-weight: 300;
    color: var(--gray-300);
    margin: 0 4px;
}

.satisfaction-stat {
    text-align: center;
    padding: 16px;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--gray-100);
}

.satisfaction-stat .stat-value {
    display: block;
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.satisfaction-stat .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.constraints-list {
    display: grid;
    gap: 16px;
}

/* 约束条件表格样式 */
.constraints-table-container {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.constraints-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.constraints-table th {
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    padding: 16px 12px;
    border-bottom: 2px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 10;
}

.constraints-table td {
    padding: 14px 12px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.constraint-row:hover {
    background: var(--gray-50);
}

.constraint-row.satisfied {
    border-left: 4px solid var(--success-color);
}

.constraint-row.unsatisfied {
    border-left: 4px solid var(--error-color);
}

/* 约束类型徽章 */
.type-badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.type-badge.type-class_size {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.type-badge.type-gender {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.type-badge.type-score {
    background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
    color: white;
}

.type-badge.type-tag {
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    color: var(--text-primary);
}

.type-badge.type-name {
    background: linear-gradient(135deg, #fd79a8 0%, #e17055 100%);
    color: white;
}

.type-badge.type-specified_class {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
    color: white;
}

/* 满足率进度条 */
.percent-container {
    display: flex;
    align-items: center;
    gap: 8px;
    min-width: 100px;
}

.percent-value {
    font-weight: 600;
    min-width: 35px;
    text-align: right;
}

.percent-value.high {
    color: var(--success-color);
}

.percent-value.medium {
    color: var(--warning-color);
}

.percent-value.low {
    color: var(--error-color);
}

.percent-bar {
    flex: 1;
    height: 6px;
    background: var(--gray-200);
    border-radius: 3px;
    overflow: hidden;
}

.percent-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.percent-fill.high {
    background: var(--success-color);
}

.percent-fill.medium {
    background: var(--warning-color);
}

.percent-fill.low {
    background: var(--error-color);
}

/* 状态徽章 */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 6px 10px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.status-badge.satisfied {
    background: var(--success-light);
    color: var(--success-color);
    border: 1px solid var(--success-color);
}

.status-badge.unsatisfied {
    background: var(--error-light);
    color: var(--error-color);
    border: 1px solid var(--error-color);
}

.constraint-details-cell {
    max-width: 200px;
    word-break: break-word;
    font-size: 13px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.constraint-satisfaction {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
}

.constraint-satisfaction:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.constraint-satisfaction.satisfied {
    border-left: 4px solid var(--success-color);
}

.constraint-satisfaction.partial {
    border-left: 4px solid var(--warning-color);
}

.constraint-satisfaction.failed {
    border-left: 4px solid var(--error-color);
}

.constraint-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 12px;
}

.constraint-info h4 {
    margin: 0 0 8px 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 8px;
}

.constraint-description {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.satisfaction-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.satisfaction-badge.satisfied {
    background: var(--success-bg);
    color: var(--success-color);
}

.satisfaction-badge.partial {
    background: var(--warning-bg);
    color: var(--warning-color);
}

.satisfaction-badge.failed {
    background: var(--error-bg);
    color: var(--error-color);
}

.constraint-details {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--gray-100);
    font-size: 13px;
    color: var(--text-secondary);
}

.constraint-metrics {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-top: 12px;
}

.metric-item {
    text-align: center;
    padding: 8px;
    background: var(--gray-50);
    border-radius: 6px;
}

.metric-value {
    display: block;
    font-size: 18px;
    font-weight: 600;
    color: var(--primary-color);
}

.metric-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
    margin-top: 4px;
}

/* 班级详细信息样式 */
.class-details {
    padding: 30px;
}

.class-details h3 {
    margin: 0 0 24px 0;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.class-tables-container {
    display: grid;
    gap: 30px;
}

.class-table-section {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.class-table-header {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    padding: 20px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.class-table-header h4 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
    color: white;
}

.class-stats {
    display: flex;
    gap: 8px;
    font-size: 14px;
    color: white;
}

.stat-row {
    display: flex;
    align-items: center;
    gap: 15px;
}

.class-stat {
    display: flex;
    align-items: center;
    gap: 6px;
}

.student-count {
    font-weight: 600;
    color: white;
}

.class-percentage {
    color: rgba(255, 255, 255, 0.8);
    font-weight: 500;
}

.gender-stats {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.9);
}

.gender-stats i {
    width: 14px;
    text-align: center;
}

.male-icon {
    color: #87ceeb;
}

.female-icon {
    color: #ffb6c1;
}

.unknown-icon {
    color: rgba(255, 255, 255, 0.6);
}

.score-stats {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 13px;
    margin-top: 4px;
    color: rgba(255, 255, 255, 0.9);
}

.score-item {
    display: flex;
    align-items: center;
    gap: 5px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

.score-item i {
    color: rgba(255, 255, 255, 0.7);
}

.class-table-container {
    overflow-x: auto;
    border-radius: 0 0 12px 12px;
}

.class-table-wrapper {
    position: relative;
}

.class-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.class-table th {
    background: var(--gray-50);
    color: var(--text-primary);
    font-weight: 600;
    text-align: left;
    padding: 14px 16px;
    border-bottom: 2px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 10;
}

.class-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--gray-100);
    vertical-align: middle;
}

.class-table tbody tr:hover {
    background: var(--gray-50);
}

.class-table tbody tr:nth-child(even) {
    background: rgba(248, 250, 252, 0.5);
}

.class-table tbody tr:nth-child(even):hover {
    background: var(--gray-50);
}

/* 学生标签在表格中的样式 */
.student-tags-cell {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    max-width: 200px;
}

.student-tag {
    display: inline-block;
    background: var(--primary-bg);
    color: var(--primary-color);
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 11px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.student-tag.custom {
    background: var(--secondary-bg);
    color: var(--secondary-color);
}

/* 性别标识 */
.gender-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.gender-indicator.male {
    background: #e3f2fd;
    color: #1976d2;
}

.gender-indicator.female {
    background: #fce4ec;
    color: #c2185b;
}

.gender-indicator.unknown {
    background: var(--gray-100);
    color: var(--text-secondary);
}

/* 分数显示 */
.score-cell {
    font-weight: 500;
    text-align: center;
}

.score-value {
    display: inline-block;
    padding: 4px 8px;
    background: var(--success-bg);
    color: var(--success-color);
    border-radius: 6px;
    font-size: 13px;
    font-weight: 600;
}

/* 响应式适配 */
@media (max-width: 1024px) {
    .satisfaction-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .constraint-metrics {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .result-header {
        flex-direction: column;
        gap: 16px;
        align-items: flex-start;
        padding: 20px;
    }
    
    .result-actions {
        width: 100%;
        justify-content: flex-end;
    }
    
    .constraints-satisfaction,
    .class-details {
        padding: 20px;
    }
    
    .satisfaction-stats {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .summary-metrics-horizontal {
        flex-direction: column;
        gap: 12px;
        align-items: stretch;
    }
    
    .summary-metrics-horizontal .metric-divider {
        display: none;
    }
    
    .summary-metrics-horizontal .metric-card {
        justify-content: space-between;
        padding: 8px 16px;
        background: white;
        border-radius: 8px;
        border: 1px solid var(--gray-200);
    }
    
    .constraints-table-container {
        overflow-x: auto;
    }
    
    .constraints-table {
        min-width: 800px;
        font-size: 13px;
    }
    
    .constraints-table th,
    .constraints-table td {
        padding: 10px 8px;
    }
    
    .percent-container {
        flex-direction: column;
        gap: 4px;
        min-width: 80px;
    }
    
    .constraint-details-cell {
        max-width: 150px;
        font-size: 12px;
    }
    
    .class-stats {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
    }
    
    .class-table-container {
        overflow-x: auto;
    }
    
    .class-table {
        font-size: 12px;
    }
    
    .class-table th,
    .class-table td {
        padding: 8px 12px;
    }
    
    .student-tags-cell {
        max-width: 150px;
    }
}

/* ================================
   VIP高端界面样式 - 尊贵、奢华、诱人
   ================================ */

/* VIP专用颜色变量 */
:root {
    /* VIP金色系 */
    --vip-gold: #ffd700;
    --vip-gold-light: #fffacd;
    --vip-gold-dark: #daa520;
    --vip-gold-gradient: linear-gradient(135deg, #ffd700 0%, #ff8c00 50%, #ff4500 100%);
    --vip-gold-radial: radial-gradient(circle, #ffd700 0%, #daa520 100%);
    
    /* VIP紫色系 */
    --vip-purple: #9933cc;
    --vip-purple-light: #e6ccff;
    --vip-purple-dark: #6600cc;
    --vip-purple-gradient: linear-gradient(135deg, #9933cc 0%, #6600cc 100%);
    
    /* VIP渐变组合 */
    --vip-premium-gradient: linear-gradient(135deg, #ffd700 0%, #ff8c00 25%, #9933cc 75%, #6600cc 100%);
    --vip-luxury-gradient: linear-gradient(45deg, #ffd700 0%, #ffb347 25%, #ff6b6b 50%, #9933cc 75%, #6600cc 100%);
    
    /* VIP阴影 */
    --vip-shadow-gold: 0 8px 32px rgba(255, 215, 0, 0.3);
    --vip-shadow-purple: 0 8px 32px rgba(153, 51, 204, 0.3);
    --vip-shadow-luxury: 0 12px 40px rgba(255, 215, 0, 0.4), 0 4px 16px rgba(153, 51, 204, 0.3);
}

/* VIP用户头像标识 */
.user-info .vip-badge {
    position: relative;
    display: inline-flex;
    align-items: center;
    margin-left: 8px;
    padding: 4px 12px;
    background: var(--vip-premium-gradient);
    color: white;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    border-radius: 20px;
    box-shadow: var(--vip-shadow-luxury);
    animation: vip-pulse 2s infinite;
    position: relative;
    overflow: hidden;
}

.user-info .vip-badge::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: var(--vip-luxury-gradient);
    border-radius: 22px;
    z-index: -1;
    animation: vip-rotate 4s linear infinite;
}

.user-info .vip-badge .crown-icon {
    font-size: 12px;
    margin-right: 4px;
    color: var(--vip-gold);
    text-shadow: 0 0 8px rgba(255, 215, 0, 0.8);
}

/* VIP等级标识 */
.user-info .vip-badge.monthly {
    background: linear-gradient(135deg, #ffd700 0%, #ff8c00 100%);
}

.user-info .vip-badge.permanent {
    background: var(--vip-premium-gradient);
    position: relative;
}

.user-info .vip-badge.permanent::after {
    content: '♦';
    position: absolute;
    right: 6px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 10px;
    color: white;
    text-shadow: 0 0 4px rgba(255, 255, 255, 0.8);
}

/* VIP动画效果 */
@keyframes vip-pulse {
    0%, 100% {
        box-shadow: var(--vip-shadow-luxury);
        transform: scale(1);
    }
    50% {
        box-shadow: var(--vip-shadow-luxury), 0 0 20px rgba(255, 215, 0, 0.6);
        transform: scale(1.05);
    }
}

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

@keyframes vip-shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

/* VIP限制提示卡片 */
.vip-restriction-card {
    background: linear-gradient(135deg, #fff5e6 0%, #ffe6f2 100%);
    border: 2px solid var(--vip-gold);
    border-radius: var(--radius-2xl);
    padding: 30px;
    text-align: center;
    box-shadow: var(--vip-shadow-gold);
    position: relative;
    overflow: hidden;
    margin: 20px 0;
}

.vip-restriction-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: vip-shimmer 2s infinite;
}

.vip-restriction-icon {
    font-size: 48px;
    background: var(--vip-gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 15px;
    display: block;
}

.vip-restriction-title {
    font-size: 24px;
    font-weight: 700;
    background: var(--vip-premium-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 10px;
}

.vip-restriction-desc {
    font-size: 16px;
    color: var(--text-secondary);
    margin-bottom: 25px;
    line-height: 1.6;
}

.vip-upgrade-btn {
    background: var(--vip-premium-gradient);
    color: white;
    border: none;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: all var(--transition-normal);
    box-shadow: var(--vip-shadow-luxury);
    text-transform: uppercase;
    letter-spacing: 1px;
    position: relative;
    overflow: hidden;
}

.vip-upgrade-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.vip-upgrade-btn:hover::before {
    left: 100%;
}

.vip-upgrade-btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--vip-shadow-luxury), 0 8px 25px rgba(255, 215, 0, 0.4);
}

/* VIP支付弹窗 */
.vip-payment-modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(10px);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: modal-fade-in 0.3s ease-out;
}

@keyframes modal-fade-in {
    from { 
        opacity: 0;
        backdrop-filter: blur(0px);
    }
    to { 
        opacity: 1;
        backdrop-filter: blur(10px);
    }
}

.vip-payment-content {
    background: white;
    border-radius: var(--radius-2xl);
    padding: 0;
    max-width: 600px;
    width: 100%;
    box-shadow: var(--vip-shadow-luxury);
    animation: modal-slide-up 0.4s ease-out;
    position: relative;
    overflow: hidden;
}

@keyframes modal-slide-up {
    from {
        transform: translateY(50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.vip-payment-header {
    background: var(--vip-premium-gradient);
    padding: 30px;
    text-align: center;
    color: white;
    position: relative;
}

.vip-payment-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><path d="M0,10 Q25,0 50,10 T100,10 V20 H0 Z" fill="rgba(255,255,255,0.1)"/></svg>') repeat-x;
    background-size: 100px 20px;
    animation: wave 4s linear infinite;
}

@keyframes wave {
    0% { transform: translateX(0); }
    100% { transform: translateX(-100px); }
}

.vip-payment-close {
    position: absolute;
    top: 15px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 24px;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.vip-payment-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: scale(1.1);
}

.vip-payment-title {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.vip-payment-subtitle {
    font-size: 16px;
    opacity: 0.9;
}

.vip-payment-body {
    padding: 40px;
}

.vip-plans {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 30px;
}

.vip-plan {
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-xl);
    padding: 25px;
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    background: white;
}

.vip-plan:hover {
    border-color: var(--vip-gold);
    box-shadow: var(--vip-shadow-gold);
    transform: translateY(-5px);
}

.vip-plan.selected {
    border-color: var(--vip-gold);
    background: var(--vip-gold-light);
    box-shadow: var(--vip-shadow-gold);
    transform: translateY(-3px);
}

.vip-plan.recommended {
    border-color: var(--vip-purple);
    position: relative;
}

.vip-plan.recommended::before {
    content: '推荐';
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--vip-purple-gradient);
    color: white;
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.vip-plan-name {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.vip-plan-price {
    font-size: 32px;
    font-weight: 800;
    background: var(--vip-gold-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 5px;
}

.vip-plan-unit {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 15px;
}

.vip-plan-features {
    list-style: none;
    text-align: left;
}

.vip-plan-features li {
    padding: 5px 0;
    color: var(--text-secondary);
    font-size: 14px;
    position: relative;
    padding-left: 20px;
}

.vip-plan-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: 600;
}

/* VIP支付二维码区域 */
.vip-qrcode-section {
    text-align: center;
    padding: 30px;
    background: var(--gray-50);
    border-radius: var(--radius-xl);
}

.vip-qrcode-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.vip-qrcode-container {
    display: inline-block;
    padding: 20px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 20px;
}

.vip-qrcode-img {
    width: 200px;
    height: 200px;
    border: none;
}

/* VIP支付二维码Canvas样式 */
.vip-qrcode-canvas {
    display: inline-block;
    border-radius: 8px;
    overflow: hidden;
}

.vip-qrcode-canvas img {
    display: block;
    border-radius: 8px;
}

.vip-payment-status {
    color: var(--text-secondary);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.vip-payment-status .loading-spinner {
    width: 16px;
    height: 16px;
    border: 2px solid var(--gray-300);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* VIP结果限制表格 */
.vip-limited-table {
    position: relative;
}

.vip-limited-table::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(transparent, white);
    pointer-events: none;
}

.vip-table-overlay {
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    background: var(--vip-premium-gradient);
    color: white;
    padding: 12px 30px;
    border-radius: 30px 30px 0 0;
    font-size: 14px;
    font-weight: 600;
    box-shadow: var(--vip-shadow-luxury);
    z-index: 10;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.vip-table-overlay:hover {
    transform: translateX(-50%) translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .vip-payment-content {
        margin: 10px;
        max-width: none;
    }
    
    .vip-payment-header {
        padding: 20px;
    }
    
    .vip-payment-title {
        font-size: 24px;
    }
    
    .vip-payment-body {
        padding: 20px;
    }
    
    .vip-plans {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .vip-qrcode-img {
        width: 160px;
        height: 160px;
    }
    
    .user-info .vip-badge {
        font-size: 10px;
        padding: 3px 8px;
    }
    
    .vip-restriction-title {
        font-size: 20px;
    }
    
    .vip-upgrade-btn {
        padding: 12px 30px;
        font-size: 14px;
    }
}

/* ================================
   系统功能介绍区域样式
   ================================ */

.intro-section {
    margin: 30px 0;
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--gray-100);
}

.intro-card {
    width: 100%;
}

/* Hero区域 */
.intro-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.intro-hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: heroFloat 6s ease-in-out infinite;
}

@keyframes heroFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    margin-bottom: 30px;
}

.hero-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 15px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.hero-title i {
    font-size: 36px;
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.hero-subtitle {
    font-size: 18px;
    opacity: 0.9;
    line-height: 1.6;
    max-width: 600px;
    margin: 0 auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 40px;
    position: relative;
    z-index: 2;
}

.stat-badge {
    text-align: center;
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-xl);
    padding: 20px;
    min-width: 100px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all var(--transition-normal);
}

.stat-badge:hover {
    background: rgba(255, 255, 255, 0.25);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.stat-number {
    display: block;
    font-size: 24px;
    font-weight: 800;
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
    margin-bottom: 5px;
}

.stat-label {
    font-size: 12px;
    opacity: 0.9;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 功能网格 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 25px;
    padding: 40px;
    background: var(--gray-50);
}

.feature-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: 30px;
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--gray-100);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.feature-card:hover::before {
    left: 100%;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.feature-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 28px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.feature-card:hover .feature-icon {
    transform: scale(1.1) rotate(5deg);
    box-shadow: var(--shadow-lg);
}

.feature-icon.gender {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.feature-icon.score {
    background: linear-gradient(135deg, #4ecdc4 0%, #44a08d 100%);
}

.feature-icon.tag {
    background: linear-gradient(135deg, #ffeaa7 0%, #fab1a0 100%);
    color: var(--text-primary);
}

.feature-icon.name {
    background: linear-gradient(135deg, #fd79a8 0%, #e17055 100%);
}

.feature-icon.specified {
    background: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 100%);
}

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-desc {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 20px;
}

.feature-tags {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.tag {
    background: var(--primary-light);
    color: var(--primary-color);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

/* 使用流程 */
.workflow-section {
    padding: 40px;
    background: white;
    border-top: 1px solid var(--gray-200);
}

.workflow-title {
    text-align: center;
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}

.workflow-title i {
    color: var(--primary-color);
}

.workflow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 200px;
}

.step-number {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.step:hover .step-number {
    transform: scale(1.1);
    box-shadow: var(--shadow-lg);
}

.step-content h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.step-content p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.4;
}

.step-arrow {
    color: var(--primary-color);
    font-size: 20px;
    opacity: 0.7;
    flex-shrink: 0;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 20px;
        padding: 30px;
    }
    
    .hero-stats {
        gap: 20px;
    }
    
    .stat-badge {
        padding: 15px;
        min-width: 80px;
    }
}

@media (max-width: 768px) {
    .intro-hero {
        padding: 30px 20px;
    }
    
    .hero-title {
        font-size: 26px;
        flex-direction: column;
        gap: 10px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 15px;
        align-items: center;
    }
    
    .stat-badge {
        width: 120px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        padding: 20px;
        gap: 20px;
    }
    
    .feature-card {
        padding: 25px;
    }
    
    .feature-icon {
        width: 60px;
        height: 60px;
        font-size: 24px;
    }
    
    .feature-title {
        font-size: 18px;
    }
    
    .workflow-section {
        padding: 30px 20px;
    }
    
    .workflow-steps {
        flex-direction: column;
        gap: 30px;
    }
    
    .step {
        max-width: none;
        width: 100%;
    }
    
    .step-arrow {
        transform: rotate(90deg);
        font-size: 16px;
    }
    
    .workflow-title {
        font-size: 20px;
    }
}

@media (max-width: 480px) {
    .intro-hero {
        padding: 25px 15px;
    }
    
    .hero-title {
        font-size: 22px;
    }
    
    .hero-title i {
        font-size: 28px;
    }
    
    .hero-subtitle {
        font-size: 14px;
    }
    
    .features-grid {
        padding: 15px;
    }
    
    .feature-card {
        padding: 20px;
    }
    
    .workflow-section {
        padding: 20px 15px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 16px;
    }
}

/* ============================================= */
/* VIP导出功能样式 */
/* ============================================= */

/* VIP导出按钮样式 */
.class-details-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
}

.class-details-title {
    flex: 1;
}

.class-details-actions {
    flex-shrink: 0;
    margin-left: 16px;
}

.vip-export-btn {
    position: relative;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 12px 20px;
    border-radius: 10px;
    font-weight: 600;
    color: white;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.vip-export-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(102, 126, 234, 0.4);
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

.vip-export-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.vip-icon {
    color: #ffd700;
    font-size: 14px;
}

.vip-badge {
    background: #ffd700;
    color: #1f2937;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 4px;
    margin-left: 4px;
}

/* VIP功能特色展示 */
.vip-features-highlight {
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    border-radius: 12px;
    padding: 20px;
    margin: 20px 0;
    border: 1px solid #e2e8f0;
}

.feature-item {
    display: flex;
    align-items: center;
    margin-bottom: 16px;
    gap: 12px;
}

.feature-item:last-child {
    margin-bottom: 0;
}

.feature-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 16px;
    flex-shrink: 0;
}

.feature-content {
    flex: 1;
}

.feature-title {
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 16px;
}

.feature-desc {
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.5;
}

/* VIP弹窗增强样式 */
.vip-plan-badge {
    position: absolute;
    top: -10px;
    right: 20px;
    background: #ffd700;
    color: #1f2937;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 700;
    box-shadow: 0 2px 8px rgba(255, 215, 0, 0.3);
}

.vip-plan-savings {
    font-size: 12px;
    color: #10b981;
    font-weight: 600;
    text-align: center;
    margin: 8px 0;
    background: rgba(16, 185, 129, 0.1);
    padding: 4px 8px;
    border-radius: 6px;
}

.vip-plan-features li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.vip-plan-features li i {
    width: 16px;
    color: var(--primary-color);
}

.payment-security {
    text-align: center;
    color: var(--text-secondary);
    font-size: 12px;
    margin-top: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
}

.payment-security i {
    color: var(--success-color);
}

/* VIP导出功能响应式设计 */
@media (max-width: 768px) {
    .class-details-header {
        flex-direction: column;
        align-items: stretch;
        gap: 16px;
    }
    
    .class-details-actions {
        margin-left: 0;
    }
    
    .vip-export-btn {
        align-self: flex-start;
    }
    
    .vip-features-highlight {
        padding: 16px;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
    
    .feature-icon {
        width: 36px;
        height: 36px;
        font-size: 14px;
    }
}