/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Arial', sans-serif;
}

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

/* 头部和导航 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 1rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 90%;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: bold;
    color: #2c3e50;
    text-decoration: none;
}

.logo img {
    width: 120px;
    height: auto;
    max-height: 60px;
    object-fit: contain;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #3498db;
}

/* 主要内容区域 */
main {
    padding: 4rem 0;
    min-height: calc(100vh - 180px);
}

.page-content {
    padding: 60px 0;
}

.page-title {
    font-size: 2.5rem;
    margin-bottom: 40px;
    color: #2c3e50;
    text-align: center;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background-color: #3498db;
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-disabled {
    display: inline-block;
    background-color: #5d5d5d;
    color: white;
    padding: 12px 25px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: bold;
    transition: background-color 0.3s;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

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

/* 英雄区域 */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('https://images.unsplash.com/photo-1555041469-a586c61ea9bc?ixlib=rb-1.2.1&auto=format&fit=crop&w=1350&q=80');
    background-size: cover;
    background-position: center;
    height: 500px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-align: center;
    padding: 0 20px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 20px;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
}

/* 分类区域 */
.categories {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    margin-bottom: 50px;
    color: #2c3e50;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.category-card {
    position: relative;
    height: 350px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.category-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
}

.category-card:hover img {
    transform: scale(1.05);
}

.category-card .overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0,0,0,0.7));
    padding: 20px;
    color: white;
}

.category-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
}

/* 特色产品 */
.featured-products {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: white;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

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

.product-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
}

.product-price {
    font-size: 1.3rem;
    font-weight: bold;
    color: #3498db;
    margin-bottom: 15px;
}

.rating {
    color: #f1c40f;
    margin-bottom: 15px;
}

/* 关于我们 */
.about {
    padding: 80px 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
}

.about-content h3 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.about-content p {
    margin-bottom: 20px;
    font-size: 1.1rem;
}

/* 客户评价 */
.testimonials {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.testimonial-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.testimonial-card {
    background-color: white;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.testimonial-card p {
    font-style: italic;
    margin-bottom: 20px;
}

.testimonial-author {
    display: flex;
    align-items: center;
}

.testimonial-author img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    margin-right: 15px;
}

/* 新闻订阅 */
.newsletter {
    padding: 80px 0;
    background-color: #3498db;
    color: white;
    text-align: center;
}

.newsletter h3 {
    font-size: 2rem;
    margin-bottom: 20px;
}

.newsletter p {
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto 30px;
}

.newsletter-form {
    display: flex;
    max-width: 600px;
    margin: 0 auto;
}

.newsletter-form input {
    flex: 1;
    padding: 15px;
    border: none;
    border-radius: 5px 0 0 5px;
    font-size: 1rem;
}

.newsletter-form button {
    background-color: #2c3e50;
    color: white;
    border: none;
    padding: 15px 30px;
    border-radius: 0 5px 5px 0;
    cursor: pointer;
    font-weight: bold;
}

/* 特色服务 */
.features {
    padding: 60px 0;
    background-color: white;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.feature-card {
    padding: 20px;
}

.feature-card i {
    font-size: 2.5rem;
    color: #3498db;
    margin-bottom: 15px;
}

/* 联系表单 */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.contact-info {
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #2c3e50;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 20px;
}

.contact-item i {
    font-size: 1.5rem;
    color: #3498db;
    margin-right: 15px;
    width: 30px;
    text-align: center;
}

.contact-form {
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group textarea {
    height: 150px;
    resize: vertical;
}

/* 政策页面样式 */
.policy-container,
.shipping-returns-container,
.terms-container {
    max-width: 800px;
    margin: 0 auto;
    background-color: #f9f9f9;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.policy-section,
.terms-section {
    margin-bottom: 30px;
}

.policy-section h3,
.terms-section h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #2c3e50;
}

.policy-section ul,
.terms-section ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.last-updated {
    font-style: italic;
    color: #666;
    margin-top: 40px;
    text-align: center;
}

/* 配送政策样式 */
.section {
    margin-bottom: 40px;
}

.section h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: #2c3e50;
    border-bottom: 2px solid #3498db;
    padding-bottom: 10px;
}

.subsection {
    margin-bottom: 30px;
}

.subsection h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #3498db;
}

.shipping-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.shipping-table th,
.shipping-table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #ddd;
}

.shipping-table th {
    background-color: #e9f2fa;
    font-weight: bold;
}

/* 页脚样式 */
footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 2rem 0;
    text-align: center;
    margin-top: 60px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-col h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
}

.footer-col h4::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: #3498db;
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-col a {
    color: #ddd;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-col a:hover {
    color: #3498db;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 1.5rem;
    margin-bottom: 1rem;
}

.footer-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #3498db;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.2rem;
    }

    .nav-links {
        display: none;
    }

    .section-title {
        font-size: 1.8rem;
    }

    .about {
        grid-template-columns: 1fr;
    }

    .newsletter-form {
        flex-direction: column;
    }

    .newsletter-form input {
        border-radius: 5px 5px 0 0;
        margin-bottom: 10px;
    }

    .newsletter-form button {
        border-radius: 0 0 5px 5px;
    }

    .contact-container {
        grid-template-columns: 1fr;
    }

    nav {
        flex-direction: column;
    }

    .nav-links {
        margin-top: 1rem;
    }

    .nav-links li {
        margin: 0 0.5rem;
    }

    .policy-container,
    .shipping-returns-container,
    .terms-container {
        padding: 20px;
    }

    .shipping-table {
        font-size: 0.9rem;
    }
}