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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: #f5f7fa;
    color: #333;
}

.admin-container {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 260px;
    background: linear-gradient(180deg, #667eea 0%, #764ba2 100%);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar .logo {
    padding: 30px 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.sidebar .logo svg {
    width: 40px;
    height: 40px;
    fill: white;
}

.sidebar .logo span {
    font-size: 18px;
    font-weight: 600;
}

.user-info {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(255,255,255,0.1);
    margin: 20px;
    border-radius: 12px;
}

.user-info .avatar {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.user-info .avatar svg {
    width: 24px;
    height: 24px;
    fill: white;
}

.user-info .username {
    font-size: 14px;
    font-weight: 500;
}

.menu {
    flex: 1;
    padding: 0 15px;
    overflow-y: auto;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 15px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    border-radius: 10px;
    margin-bottom: 5px;
    transition: all 0.3s;
}

.menu-item:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.menu-item.active {
    background: rgba(255,255,255,0.2);
    color: white;
}

.menu-item svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.menu-item span {
    font-size: 14px;
}

.logout {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.logout a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 15px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    border-radius: 10px;
    transition: all 0.3s;
}

.logout a:hover {
    background: rgba(255,255,255,0.1);
    color: white;
}

.logout svg {
    width: 20px;
    height: 20px;
    fill: currentColor;
}

.logout span {
    font-size: 14px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: 260px;
    padding: 30px;
}

.content {
    max-width: 1400px;
}

/* 顶部导航 */
.top-nav {
    background: white;
    padding: 20px 30px;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    margin-bottom: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-nav h2 {
    font-size: 20px;
    font-weight: 600;
    color: #333;
}

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

/* 卡片 */
.card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    padding: 25px;
    margin-bottom: 20px;
}

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

.card-title {
    font-size: 16px;
    font-weight: 600;
    color: #333;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    border-radius: 15px;
    padding: 25px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    display: flex;
    align-items: center;
    gap: 20px;
}

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

.stat-icon svg {
    width: 30px;
    height: 30px;
    fill: white;
}

.stat-icon.blue {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.stat-icon.green {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

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

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

.stat-info h3 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    margin-bottom: 5px;
}

.stat-info p {
    font-size: 14px;
    color: #999;
}

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

table {
    width: 100%;
    border-collapse: collapse;
}

table th,
table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

table th {
    font-size: 14px;
    font-weight: 600;
    color: #666;
    background: #f9fafb;
}

table td {
    font-size: 14px;
    color: #333;
}

table tr:hover {
    background: #f9fafb;
}

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

.badge-success {
    background: #e8f5e9;
    color: #4caf50;
}

.badge-warning {
    background: #fff3e0;
    color: #ff9800;
}

.badge-danger {
    background: #ffebee;
    color: #f44336;
}

.badge-info {
    background: #e3f2fd;
    color: #2196f3;
}

.badge-purple {
    background: #f3e5f5;
    color: #9c27b0;
}

/* 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s;
    border: none;
    text-decoration: none;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(102, 126, 234, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

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

.btn-sm {
    padding: 6px 14px;
    font-size: 13px;
}

/* 表单 */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid #e5e5e5;
    border-radius: 10px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

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

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination a {
    padding: 8px 16px;
    background: white;
    border-radius: 8px;
    text-decoration: none;
    color: #333;
    font-size: 14px;
    transition: all 0.3s;
}

.pagination a:hover,
.pagination a.active {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

/* 搜索框 */
.search-box {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.search-box input {
    flex: 1;
    padding: 10px 15px;
    border: 2px solid #e5e5e5;
    border-radius: 8px;
    font-size: 14px;
}

.search-box input:focus {
    outline: none;
    border-color: #667eea;
}

/* 响应式 */
@media (max-width: 1200px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 200px;
    }
    
    .main-content {
        margin-left: 200px;
        padding: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}