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

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    background-color: #f5f5f5;
    min-height: 100vh;
}

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

.login-box {
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h2 {
    color: #333;
    font-weight: 600;
}

.login-box .form-check-label a {
    color: #0d6efd;
    text-decoration: none;
}

.login-box .form-check-label a:hover {
    text-decoration: underline;
}

.navbar {
    margin-bottom: 0;
}

.card {
    border: none;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
}

.card-header {
    background: #fff;
    border-bottom: 1px solid #eee;
    font-weight: 600;
}

.table th {
    background: #f8f9fa;
    border-bottom: 2px solid #dee2e6;
}

.btn-sm {
    margin-right: 5px;
}

.alert {
    margin-bottom: 1rem;
}

.badge {
    font-size: 0.75rem;
    padding: 0.35em 0.65em;
}

@media (max-width: 768px) {
    .login-box {
        padding: 20px;
        margin: 10px;
    }
    
    .card-body {
        padding: 1rem;
    }
}