/* 基本样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

a {
    color: #3498db;
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #2980b9;
}

ul {
    list-style: none;
}

/* 布局 */
.container {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background-color: #2c3e50;
    color: #fff;
    padding: 20px 0;
    box-shadow: 2px 0 5px rgba(0, 0, 0, 0.1);
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

.content {
    background-color: #fff;
    padding: 20px;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    margin-top: 20px;
}

/* 侧边栏 */
.logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.logo h2 {
    font-size: 18px;
    font-weight: 600;
    text-align: center;
}

.main-nav ul li a {
    display: block;
    padding: 12px 20px;
    color: #ecf0f1;
    border-left: 3px solid transparent;
    transition: all 0.3s;
}

.main-nav ul li a:hover,
.main-nav ul li a.active {
    background-color: rgba(255, 255, 255, 0.1);
    border-left-color: #3498db;
}

/* 头部 */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
    color: #2c3e50;
}

.user-info {
    display: flex;
    align-items: center;
    font-size: 14px;
}

.role-badge {
    display: inline-block;
    padding: 3px 8px;
    background-color: #3498db;
    color: #fff;
    border-radius: 3px;
    font-size: 12px;
    margin-left: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 600;
    color: #555;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group input[type="email"],
.form-group input[type="number"],
.form-group input[type="date"],
.form-group input[type="datetime-local"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input[type="text"]:focus,
.form-group input[type="password"]:focus,
.form-group input[type="email"]:focus,
.form-group input[type="number"]:focus,
.form-group input[type="date"]:focus,
.form-group input[type="datetime-local"]:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #3498db;
    outline: none;
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 8px 16px;
    background-color: #3498db;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #2980b9;
}

.btn-primary {
    background-color: #3498db;
}

.btn-success {
    background-color: #2ecc71;
}

.btn-success:hover {
    background-color: #27ae60;
}

.btn-danger {
    background-color: #e74c3c;
}

.btn-danger:hover {
    background-color: #c0392b;
}

.btn-warning {
    background-color: #f39c12;
}

.btn-warning:hover {
    background-color: #d35400;
}

.btn-block {
    display: block;
    width: 100%;
}

/* 表格样式 */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.table th,
.table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

.table th {
    background-color: #f9f9f9;
    font-weight: 600;
    color: #333;
}

.table tr:hover {
    background-color: #f5f5f5;
}

.table .actions {
    text-align: center;
    white-space: nowrap;
}

.table .actions a {
    margin: 0 5px;
}

/* 提示框 */
.alert {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

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

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

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeeba;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

.page-link {
    display: inline-block;
    padding: 5px 10px;
    margin: 0 3px;
    border: 1px solid #ddd;
    border-radius: 3px;
    color: #3498db;
    background-color: #fff;
}

.page-link:hover {
    background-color: #f5f5f5;
}

.page-link.active {
    background-color: #3498db;
    color: #fff;
    border-color: #3498db;
}

.page-link.disabled {
    color: #aaa;
    cursor: not-allowed;
}

.page-link.dots {
    border: none;
    background: none;
}

/* 卡片样式 */
.card {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    border-bottom: 1px solid #eee;
    padding-bottom: 15px;
    margin-bottom: 15px;
    font-weight: 600;
    font-size: 18px;
}

.card-body {
    padding: 15px 0;
}

/* 仪表盘统计卡片 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    padding: 20px;
    text-align: center;
    transition: transform 0.3s;
}

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

.stat-card .stat-value {
    font-size: 36px;
    font-weight: 700;
    color: #3498db;
    margin-bottom: 10px;
}

.stat-card .stat-label {
    font-size: 16px;
    color: #777;
}

/* 登录页面 */
.login-page {
    background-color: #f5f5f5;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    width: 400px;
    max-width: 90%;
}

.login-form {
    background-color: #fff;
    padding: 30px;
    border-radius: 5px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.login-header h1 {
    font-size: 24px;
    margin-bottom: 10px;
    color: #2c3e50;
}

.login-header p {
    color: #7f8c8d;
}

/* 图片上传预览 */
.image-preview {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 10px;
}

.image-preview-item {
    position: relative;
    width: 100px;
    height: 100px;
    border: 1px solid #ddd;
    border-radius: 4px;
    overflow: hidden;
}

.image-preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.image-preview-item .remove-image {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.7);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    font-size: 12px;
    color: #e74c3c;
}

/* 活动详情 */
.activity-detail {
    margin-bottom: 30px;
}

.activity-detail h2 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.activity-meta {
    margin-bottom: 20px;
    color: #7f8c8d;
    font-size: 14px;
}

.activity-meta span {
    margin-right: 15px;
}

.activity-content {
    margin-bottom: 20px;
    line-height: 1.8;
}

.activity-images {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.activity-image {
    width: 150px;
    height: 150px;
    border-radius: 5px;
    overflow: hidden;
}

.activity-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.activity-attachments {
    margin-top: 20px;
}

.activity-attachments h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.attachment-item {
    display: flex;
    align-items: center;
    padding: 10px;
    border: 1px solid #eee;
    border-radius: 4px;
    margin-bottom: 10px;
}

.attachment-item a {
    display: flex;
    align-items: center;
    color: #3498db;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 10px;
    }
    
    .main-content {
        margin-left: 0;
        padding: 15px;
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .user-info {
        margin-top: 10px;
    }
}