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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.page {
    min-height: 100vh;
}

/* 登录页面 */
.login-container {
    max-width: 400px;
    margin: 100px auto;
    padding: 40px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.login-container h1 {
    text-align: center;
    margin-bottom: 30px;
    color: #2c3e50;
}

.login-container input {
    width: 100%;
    padding: 12px;
    margin-bottom: 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.login-container button {
    width: 100%;
    padding: 12px;
    background: #3498db;
    color: white;
    border: none;
    border-radius: 4px;
    font-size: 16px;
    cursor: pointer;
}

.login-container button:hover {
    background: #2980b9;
}

/* 主页面 */
header {
    background: #2c3e50;
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

header h1 {
    font-size: 24px;
}

#logoutBtn {
    background: #e74c3c;
    color: white;
    border: none;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
}

#logoutBtn:hover {
    background: #c0392b;
}

nav {
    background: white;
    padding: 15px 20px;
    border-bottom: 1px solid #ddd;
    display: flex;
    gap: 10px;
}

.nav-btn {
    padding: 10px 20px;
    background: white;
    border: 1px solid #ddd;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
}

.nav-btn:hover {
    background: #f5f5f5;
}

.nav-btn.active {
    background: #3498db;
    color: white;
    border-color: #3498db;
}

.content-page {
    display: none;
    padding: 20px;
    max-width: 1200px;
    margin: 0 auto;
}

.content-page.active {
    display: block;
}

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

.page-header h2 {
    color: #2c3e50;
}

/* 按钮样式 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
}

.btn-primary {
    background: #3498db;
    color: white;
}

.btn-primary:hover {
    background: #2980b9;
}

.btn-secondary {
    background: #95a5a6;
    color: white;
}

.btn-secondary:hover {
    background: #7f8c8d;
}

.btn-danger {
    background: #e74c3c;
    color: white;
}

.btn-danger:hover {
    background: #c0392b;
}

.btn-success {
    background: #27ae60;
    color: white;
}

.btn-success:hover {
    background: #229954;
}

/* 商品网格 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.product-card {
    background: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.2s;
}

.product-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
}

.product-image {
    width: 100%;
    height: 200px;
    object-fit: cover;
    background: #f0f0f0;
}

.product-info {
    padding: 15px;
}

.product-name {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 8px;
    color: #2c3e50;
}

.product-price {
    font-size: 20px;
    color: #e74c3c;
    font-weight: bold;
    margin-bottom: 5px;
}

.product-stock {
    color: #7f8c8d;
    font-size: 14px;
    margin-bottom: 10px;
}

.product-actions {
    display: flex;
    gap: 10px;
}

.product-actions button {
    flex: 1;
    padding: 8px;
    font-size: 14px;
}

/* 订单列表 */
.orders-list {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.order-card {
    background: white;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.order-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 15px;
    border-bottom: 1px solid #eee;
}

.order-number {
    font-weight: bold;
    color: #2c3e50;
}

.order-status {
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: bold;
}

.status-pending {
    background: #f39c12;
    color: white;
}

.status-processing {
    background: #3498db;
    color: white;
}

.status-shipped {
    background: #9b59b6;
    color: white;
}

.status-completed {
    background: #27ae60;
    color: white;
}

.status-cancelled {
    background: #e74c3c;
    color: white;
}

.order-info {
    margin-bottom: 15px;
}

.order-info p {
    margin: 5px 0;
    color: #555;
}

.order-total {
    font-size: 18px;
    font-weight: bold;
    color: #e74c3c;
    margin-top: 10px;
}

.order-items {
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px solid #eee;
}

.order-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
}

.order-actions {
    display: flex;
    gap: 10px;
    margin-top: 15px;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    overflow: auto;
}

.modal-content {
    background-color: white;
    margin: 50px auto;
    padding: 30px;
    border-radius: 8px;
    width: 90%;
    max-width: 600px;
    position: relative;
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    position: absolute;
    right: 20px;
    top: 20px;
}

.close:hover {
    color: #000;
}

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

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
    color: #2c3e50;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-group textarea {
    resize: vertical;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    margin-top: 30px;
}

/* 响应式 */
@media (max-width: 768px) {
    .products-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    }
    
    .modal-content {
        width: 95%;
        margin: 20px auto;
        padding: 20px;
    }
}