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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    background-color: #f5f5f5;
}

/* 头部样式 */
.header {
    width: 100%;
    height: auto;
    position: relative;
    overflow: hidden;
    background-color: #87CEEB;
}

.header img {
    width: 100%;
    height: auto;
    display: block;
    max-height: 400px;
    object-fit: cover;
    object-position: center;
}

/* 导航栏样式 */
.main-nav {
    background-color: white;
    padding: 15px 0;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.main-nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    padding: 0 20px;
}

.main-nav a {
    text-decoration: none;
    color: #333;
    font-size: 16px;
    padding: 8px 20px;
    border-radius: 20px;
    transition: all 0.3s ease;
}

.main-nav a:hover,
.main-nav a.active {
    background-color: #87CEEB;
    color: white;
}

/* 商品网格布局 */
.products-grid {
    max-width: 1200px;
    margin: 30px auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    padding: 0 20px;
}

.product-card {
    background: white;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
}

.product-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 15px;
}

.product-card h3 {
    color: #333;
    margin-bottom: 10px;
}

.product-card p {
    color: #666;
    margin-bottom: 15px;
}

.buy-btn {
    background-color: #87CEEB;
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.buy-btn:hover {
    background-color: #5F9EA0;
}

/* 页脚样式 */
.footer {
    background-color: white;
    padding: 30px 20px;
    text-align: center;
    margin-top: 50px;
}

.footer p {
    color: #666;
    margin-bottom: 10px;
}

.copyright {
    color: #999;
    font-size: 14px;
    margin-top: 20px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav ul {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }

    .products-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }

    .header img {
        max-height: 300px;
    }
}

/* 添加平滑滚动效果 */
html {
    scroll-behavior: smooth;
}