/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

.container {
    width: 80%;
    margin: 0 auto;
    overflow: hidden;
}

/* 头部样式 */
header {
    background-color: #e05040;
    color: #e1c270;
    padding: 1rem 0;
}

header h1 {
    float: left;
}

header nav {
    float: right;
}

footer nav {
    float: none;
    text-align: center;
    margin-bottom: 1rem;
}

nav ul {
    list-style: none;
}

nav ul li {
    display: inline;
    margin: 0 0.5rem;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

/* 产品列表样式 */
.products {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin: 2rem 0;
}

.product {
    background-color: #fff;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.product img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    margin-bottom: 1rem;
}

.product h3 {
    margin-bottom: 0.5rem;
}

.product p {
    margin-bottom: 1rem;
}

.product .price {
    font-size: 1.2rem;
    font-weight: bold;
    color: #e8491d;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background-color: #333;
    color: #fff;
    padding: 0.5rem 1rem;
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #555;
}

.btn-primary {
    background-color: #e8491d;
}

.btn-primary:hover {
    background-color: #c73e17;
}

/* 购物车样式 */
.cart {
    background-color: #fff;
    padding: 1rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem 0;
}

.cart table {
    width: 100%;
    border-collapse: collapse;
}

.cart th, .cart td {
    padding: 0.5rem;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.cart th {
    background-color: #f4f4f4;
}

.cart .total {
    text-align: right;
    margin-top: 1rem;
    font-weight: bold;
}

/* 表单样式 */
.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
}

.form-group input, .form-group textarea, .form-group select, .form-control {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    box-sizing: border-box;
}

.form-control {
    font-size: 16px;
}

/* 姓名表单样式 */
.name-form {
    background-color: #fff;
    padding: 1.5rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem 0;
}

.name-form form {
    max-width: 500px;
    margin: 0 auto;
}

/* 表单行样式 */
.form-row {
    display: flex;
    gap: 1rem;
    margin-bottom: 1rem;
}

.form-row .form-group {
    flex: 1;
    margin-bottom: 0;
}

/* 登录和注册页面样式 */
.login, .register {
    background-color: #fff;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    margin: 2rem auto;
    width: 50%;
}

/* 页脚样式 */
footer {
    background-color: #e05040;
    color: #e1c270;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .products {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .login, .register {
        width: 70%;
    }
    
    .container {
        width: 90%;
    }
    
    table {
        font-size: 0.9rem;
    }
    
    th, td {
        padding: 0.3rem;
    }
}

@media (max-width: 576px) {
    .products {
        grid-template-columns: 1fr;
    }
    
    .login, .register {
        width: 90%;
    }
    
    header h1 {
        float: none;
        text-align: center;
        font-size: 1.5rem;
    }
    
    nav {
        float: none;
        text-align: center;
        margin-top: 1rem;
    }
    
    nav ul li {
        display: block;
        margin: 0.5rem 0;
    }
    
    .container {
        width: 95%;
    }
    
    table {
        font-size: 0.8rem;
    }
    
    th, td {
        padding: 0.2rem;
    }
    
    .product img {
        height: 150px;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.9rem;
    }
    
    h2 {
        font-size: 1.3rem;
    }
    
    h3 {
        font-size: 1.1rem;
    }
    
    .form-row {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .form-row .form-group {
        margin-bottom: 0.5rem;
    }
}