body {
    background-color: #f8f9fa;
}

.card {
    box-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    border: 1px solid rgba(0, 0, 0, 0.125);
}

.card-header {
    background-color: #f8f9fa;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
}

.navbar-brand {
    font-weight: bold;
    font-size: 1.5rem;
}

.alert {
    border: none;
    border-radius: 0.5rem;
}

.btn {
    border-radius: 0.375rem;
}

.table th {
    border-top: none;
    font-weight: 600;
    color: #6c757d;
}

.badge {
    font-size: 0.75em;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }

    .card {
        margin-bottom: 1rem;
    }
}