/* 基础布局 */
body {
    background-color: #f5f7fa;
}

.main-content {
    margin-top: 70px;
    min-height: calc(100vh - 70px);
}

/* 登录页面 */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}

/* 统计卡片 */
.stat-card {
    border-radius: 12px;
    border: none;
}

.stat-card .card-body {
    padding: 1.5rem;
}

/* 表格优化 */
.table th {
    font-weight: 600;
    white-space: nowrap;
}

/* 响应式优化 */
@media (max-width: 768px) {
    .main-content {
        margin-top: 56px;
    }
    
    .stat-card h3 {
        font-size: 1.25rem;
    }
    
    .table-responsive {
        font-size: 0.875rem;
    }
}