* {
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding-bottom: 30px;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

.navbar {
    box-shadow: 0 2px 10px rgba(0,0,0,.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.3rem;
}

.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0,0,0,.1);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    font-weight: 600;
    border: none;
    padding: 1rem 1.5rem;
}

.card-body {
    padding: 2rem 1.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd6 0%, #6a4190 100%);
    transform: translateY(-1px);
    box-shadow: 0 5px 20px rgba(102, 126, 234, .4);
}

.btn-info {
    background: #17a2b8;
    border: none;
    border-radius: 6px;
}

.btn-danger {
    border-radius: 6px;
}

.table {
    background-color: #fff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 40px rgba(0,0,0,.1);
}

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

.table thead th {
    border: none;
    font-weight: 500;
}

.form-control {
    border-radius: 8px;
    border: 1px solid #e1e5e9;
    padding: 0.6rem 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    border-color: #667eea;
    box-shadow: 0 0 0 0.2rem rgba(102, 126, 234, .25);
}

.alert {
    border-radius: 8px;
    border: none;
}

/* 微信端适配 */
@media (max-width: 576px) {
    .container {
        padding-left: 15px;
        padding-right: 15px;
    }
    
    h2 {
        font-size: 1.5rem;
    }
    
    .card-body {
        padding: 1.5rem 1rem;
    }
    
    .table-responsive {
        font-size: 0.9rem;
    }
}

/* 按钮点击效果 */
.btn:active {
    transform: scale(0.98);
}