* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Arial, sans-serif;
}

body {
    background-color: #f9f9f9;
    color: #333;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background-color: #0053E2;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.navbar .logo {
    font-size: 1.5rem;
    font-weight: bold;
}

.navbar ul {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.navbar ul a {
    color: #fff;
    text-decoration: none;
    font-weight: 500;
    transition: opacity 0.3s;
}

.navbar ul a:hover {
    opacity: 0.8;
}

/* 宣传栏 */
.hero {
    background-color: #0053E2;
    color: #fff;
    text-align: center;
    padding: 4rem 1rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    max-width: 700px;
    margin: 0 auto;
}

/* 分类区 */
.categories {
    padding: 3rem 2rem;
    text-align: center;
}

.categories h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #0053E2;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.category-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
}

.category-item p {
    margin-top: 0.8rem;
    font-weight: 500;
    color: #333;
}

/* 推荐商品 */
.recommendations {
    padding: 3rem 2rem;
    background-color: #f0f5ff;
}

.recommendations h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #0053E2;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.product-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

.product-card img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.product-info {
    padding: 1rem;
}

.product-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: #0053E2;
}

.product-info .price {
    font-size: 1.3rem;
    font-weight: bold;
    color: #e63946;
}

.product-info p {
    font-size: 0.95rem;
    color: #555;
    margin-top: 0.5rem;
}

/* 页脚 */
.footer {
    background-color: #0053E2;
    color: #fff;
    padding: 2.5rem 2rem;
    text-align: center;
}

.footer .footer-content {
    max-width: 900px;
    margin: 0 auto;
}

.footer h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.footer p {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.footer a {
    color: #fff;
    text-decoration: underline;
}

.footer a:hover {
    opacity: 0.8;
}

.footer .copyright {
    margin-top: 1.5rem;
    font-size: 0.9rem;
    opacity: 0.9;
}