/* 全局样式 */
:root {
    --primary: #3a86ff;
    --primary-dark: #2667cc;
    --secondary: #8338ec;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --light: #f8f9fa;
    --dark: #343a40;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --border: #dee2e6;
    --shadow: 0 2px 8px rgba(0,0,0,0.1);
    --radius: 8px;
    --radius-sm: 4px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s;
}

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

button {
    font-family: inherit;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn i {
    font-size: 14px;
}

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

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

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

.btn-secondary:hover {
    background: #7226d3;
    border-color: #7226d3;
    color: white;
}

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

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

.btn-danger {
    background: var(--danger);
    color: white;
    border: 1px solid var(--danger);
}

.btn-danger:hover {
    background: #c82333;
    border-color: #c82333;
}

.btn-block {
    width: 100%;
}

.btn-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border: none;
    background: transparent;
    color: var(--gray);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.3s;
}

.btn-icon:hover {
    background: var(--gray-light);
    color: var(--dark);
}

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

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

.form-group .required {
    color: var(--danger);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(58, 134, 255, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--gray);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.password-input {
    position: relative;
}

.password-input input {
    padding-right: 40px;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
}

/* 认证页面 */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.auth-card {
    width: 100%;
    max-width: 1200px;
    background: white;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(0,0,0,0.2);
    display: grid;
    grid-template-columns: 1fr 1fr;
    min-height: 600px;
}

.auth-header {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 20px;
}

.brand-logo i {
    font-size: 28px;
}

.auth-header h1 {
    font-size: 32px;
    margin-bottom: 10px;
}

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

.auth-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    padding: 40px;
}

.welcome-section {
    padding-right: 20px;
}

.welcome-icon {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 20px;
}

.features-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 30px;
}

.feature-item {
    text-align: center;
    padding: 20px;
    background: var(--light);
    border-radius: var(--radius);
    transition: transform 0.3s;
}

.feature-item:hover {
    transform: translateY(-5px);
}

.feature-item i {
    font-size: 24px;
    color: var(--primary);
    margin-bottom: 10px;
}

.feature-item h4 {
    margin-bottom: 5px;
    font-size: 14px;
}

.feature-item p {
    font-size: 12px;
    color: var(--gray);
}

.login-section {
    border-left: 1px solid var(--border);
    padding-left: 40px;
}

.auth-form {
    margin-top: 30px;
}

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

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    font-size: 14px;
}

.forgot-link {
    font-size: 14px;
    color: var(--gray);
}

.auth-footer {
    margin-top: 30px;
    text-align: center;
    color: var(--gray);
    font-size: 12px;
}

.message {
    padding: 12px 20px;
    border-radius: var(--radius-sm);
    margin-top: 20px;
    font-size: 14px;
    display: none;
}

.message.success {
    display: block;
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.message.error {
    display: block;
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* 仪表板布局 */
.dashboard {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: white;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 25px;
    border-bottom: 1px solid var(--border);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 20px;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary);
}

.user-details h4 {
    font-size: 14px;
    margin-bottom: 4px;
}

.user-role {
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 10px;
    background: var(--light);
    color: var(--gray);
}

.user-role.admin {
    background: #d4edff;
    color: var(--primary);
}

.sidebar-nav ul {
    list-style: none;
    padding: 20px 0;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav li a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 25px;
    color: var(--dark);
    transition: all 0.3s;
}

.sidebar-nav li a:hover {
    background: var(--light);
    color: var(--primary);
}

.sidebar-nav li.active a {
    background: var(--light);
    color: var(--primary);
    border-right: 3px solid var(--primary);
}

.sidebar-nav .divider {
    padding: 10px 25px;
    font-size: 12px;
    color: var(--gray);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 20px;
}

.sidebar-footer {
    margin-top: auto;
    padding: 20px 25px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--gray);
    text-align: center;
}

/* 主要内容区 */
.main-content {
    padding: 20px;
    overflow-y: auto;
}

.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}

.header-left h1 {
    font-size: 24px;
    margin-bottom: 5px;
}

.welcome-text {
    color: var(--gray);
    font-size: 14px;
}

.header-actions {
    display: flex;
    gap: 10px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: var(--radius);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
    box-shadow: var(--shadow);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.total {
    background: linear-gradient(135deg, #6a11cb 0%, #2575fc 100%);
}

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

.stat-icon.ongoing {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-icon.completed {
    background: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);
}

.stat-info h3 {
    font-size: 32px;
    margin-bottom: 5px;
}

.stat-info p {
    color: var(--gray);
    font-size: 14px;
}

/* 内容网格 */
.content-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.content-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 18px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-subtitle {
    font-size: 14px;
    color: var(--gray);
}

.view-all {
    font-size: 14px;
    color: var(--primary);
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    background: var(--light);
}

/* 展会列表项 */
.exhibition-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.exhibition-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--light);
    border-radius: var(--radius-sm);
    transition: all 0.3s;
}

.exhibition-item:hover {
    background: #e9ecef;
}

.exhibition-item.urgent {
    background: #fff3cd;
    border-left: 4px solid var(--warning);
}

.exhibition-date {
    width: 50px;
    height: 50px;
    background: white;
    border-radius: var(--radius-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

.exhibition-date.upcoming {
    background: #d4edff;
    color: var(--primary);
}

.exhibition-date.ongoing {
    background: #d1ecf1;
    color: var(--info);
}

.exhibition-date.completed {
    background: #f8d7da;
    color: var(--danger);
}

.exhibition-date.urgent {
    background: #fff3cd;
    color: var(--warning);
}

.date-day {
    font-size: 18px;
    line-height: 1;
}

.date-month {
    font-size: 12px;
    text-transform: uppercase;
}

.exhibition-info {
    flex: 1;
}

.exhibition-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.exhibition-info p {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 5px;
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 10px;
    font-size: 12px;
    font-weight: 500;
}

.tag.upcoming {
    background: #d4edff;
    color: var(--primary);
}

.tag.ongoing {
    background: #d1ecf1;
    color: var(--info);
}

.tag.completed {
    background: #f8d7da;
    color: var(--danger);
}

.tag.urgent {
    background: #fff3cd;
    color: var(--warning);
}

.tag.current-user {
    background: #d4edff;
    color: var(--primary);
    margin-left: 8px;
}

.exhibition-actions {
    display: flex;
    gap: 5px;
}

.action-btn {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: white;
    border-radius: var(--radius-sm);
    color: var(--gray);
    transition: all 0.3s;
}

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

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 40px 20px;
}

.empty-state i {
    font-size: 48px;
    color: var(--gray-light);
    margin-bottom: 20px;
}

.empty-state h3 {
    margin-bottom: 10px;
    color: var(--gray);
}

.empty-state p {
    color: var(--gray);
    margin-bottom: 20px;
}

/* 过滤器 */
.filters-card {
    background: white;
    border-radius: var(--radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--shadow);
}

.filter-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.filter-group {
    flex: 1;
}

.filter-row {
    display: flex;
    gap: 10px;
    align-items: flex-end;
}

.search-box {
    position: relative;
}

.search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--gray);
}

.search-box input {
    width: 100%;
    padding: 12px 16px 12px 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 14px;
}

/* 统计摘要 */
.stats-summary {
    display: flex;
    gap: 20px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.stat-item {
    background: white;
    border-radius: var(--radius);
    padding: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
    box-shadow: var(--shadow);
}

.stat-label {
    font-size: 14px;
    color: var(--gray);
    margin-bottom: 5px;
}

.stat-value {
    font-size: 24px;
    font-weight: bold;
}

.stat-value.upcoming {
    color: var(--primary);
}

.stat-value.ongoing {
    color: var(--info);
}

.stat-value.completed {
    color: var(--danger);
}

/* 表格 */
.table-responsive {
    overflow-x: auto;
}

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

.data-table th {
    background: var(--light);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 1px solid var(--border);
}

.data-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
}

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

.data-table tr.upcoming-row {
    background: #f8fbff;
}

.data-table tr.ongoing-row {
    background: #f8fdfe;
}

.data-table tr.completed-row {
    background: #fff8f8;
}

.data-table tr.urgent-row {
    background: #fffcf3;
}

.website-link {
    margin-top: 5px;
}

.website-link a {
    font-size: 12px;
    color: var(--gray);
}

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

.date-range {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 5px;
}

.date-range i {
    font-size: 12px;
    color: var(--gray);
}

.duration {
    font-size: 12px;
    color: var(--gray);
}

.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge.upcoming {
    background: #d4edff;
    color: var(--primary);
}

.status-badge.ongoing {
    background: #d1ecf1;
    color: var(--info);
}

.status-badge.completed {
    background: #f8d7da;
    color: var(--danger);
}

.status-badge.urgent {
    background: #fff3cd;
    color: var(--warning);
}

.status-badge.admin {
    background: #d4edff;
    color: var(--primary);
}

.status-badge.user {
    background: #e2e3e5;
    color: var(--gray);
}

.status-badge.active {
    background: #d4edda;
    color: var(--success);
}

.status-badge.inactive {
    background: #f8d7da;
    color: var(--danger);
}

.action-buttons {
    display: flex;
    gap: 5px;
}

.bulk-actions {
    display: flex;
    gap: 10px;
    justify-content: flex-end;
}

/* 表单容器 */
.form-container {
    padding: 20px;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
}

.form-section {
    background: var(--light);
    padding: 25px;
    border-radius: var(--radius);
}

.form-section.full-width {
    grid-column: 1 / -1;
}

.form-section h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
    color: var(--dark);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border);
}

/* 状态横幅 */
.status-banner {
    padding: 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.status-banner.upcoming {
    background: linear-gradient(135deg, #d4edff, #e3f2fd);
    border-left: 4px solid var(--primary);
}

.status-banner.ongoing {
    background: linear-gradient(135deg, #d1ecf1, #e8f6f8);
    border-left: 4px solid var(--info);
}

.status-banner.completed {
    background: linear-gradient(135deg, #f8d7da, #fce8e8);
    border-left: 4px solid var(--danger);
}

.status-banner.urgent {
    background: linear-gradient(135deg, #fff3cd, #fff8e1);
    border-left: 4px solid var(--warning);
}

.status-content {
    display: flex;
    align-items: center;
    gap: 15px;
}

.status-content i {
    font-size: 32px;
}

.status-content h3 {
    margin-bottom: 5px;
}

.reminder-info {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--warning);
    font-weight: 500;
}

/* 信息部分 */
.info-section {
    padding: 20px;
    border-top: 1px solid var(--border);
    background: var(--light);
}

.info-section h3 {
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 16px;
}

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

.info-item {
    display: flex;
    flex-direction: column;
}

.info-item label {
    font-size: 12px;
    color: var(--gray);
    margin-bottom: 5px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-item span {
    font-size: 14px;
    color: var(--dark);
    font-weight: 500;
}

/* 警告框 */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius-sm);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert i {
    font-size: 16px;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    width: 90%;
    max-width: 500px;
    animation: modalFadeIn 0.3s;
}

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

.modal-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 18px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--gray);
    line-height: 1;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    padding: 20px;
    border-top: 1px solid var(--border);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.text-warning {
    color: var(--warning);
    font-weight: 500;
}

/* 状态横幅的额外样式 */
.status-note {
    margin-top: 8px;
    font-size: 14px;
    opacity: 0.9;
}

.status-note i {
    margin-right: 5px;
}

/* 不同状态的图标颜色 */
.status-banner.completed .status-content i {
    color: #6c757d;
}

.status-banner.ongoing .status-content i {
    color: #17a2b8;
}

.status-banner.upcoming .status-content i {
    color: #007bff;
}

.status-banner.urgent .status-content i {
    color: #ffc107;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .dashboard {
        grid-template-columns: 220px 1fr;
    }
    
    .auth-card {
        grid-template-columns: 1fr;
        max-width: 500px;
    }
    
    .auth-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .welcome-section {
        display: none;
    }
    
    .login-section {
        border-left: none;
        padding-left: 0;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .sidebar {
        display: none;
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .content-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .header-actions {
        flex-direction: column;
        gap: 10px;
    }
    
    .stats-summary {
        justify-content: center;
    }
    
    .status-banner {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .filter-row {
        flex-direction: column;
    }
    
    .bulk-actions {
        flex-direction: column;
    }
    
    .form-actions {
        flex-direction: column;
    }
}

/* 打印样式 */
@media print {
    .sidebar,
    .header-actions,
    .action-buttons,
    .bulk-actions,
    .form-actions {
        display: none !important;
    }
    
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 0;
    }
    
    .content-card {
        box-shadow: none;
        border: 1px solid var(--border);
    }
}