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

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

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

.section-title {
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
    color: #333;
}

/* 导航栏样式 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.logo {
    font-size: 1.8rem;
    font-weight: bold;
    color: #4CAF50;
}

.nav-links a {
    margin: 0 1rem;
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav-links a:hover {
    color: #4CAF50;
}

.contact-icon i {
    font-size: 1.2rem;
    color: #4CAF50;
}

/* 主横幅样式 */
.hero {
    height: 90vh;
    background-image: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('images/hero-bg.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 60px;
}

.hero-content {
    max-width: 800px;
    padding: 0 2rem;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* 分类页面特定样式 */
.category-hero {
    height: 60vh;
    background-image: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('images/dog-hero.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 60px;
}

.cat-hero {
    background-image: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5)), url('images/cat-hero.jpg');
}

.product-categories {
    padding: 5rem 5%;
    background: #f9f9f9;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.nav-links .active {
    color: #4CAF50;
    font-weight: bold;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .category-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    }
    
    .category-hero {
        height: 40vh;
    }
}

.category-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.category-card {
    text-align: center;
    padding: 2rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.category-card:hover {
    transform: translateY(-10px);
}

.category-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.category-card p {
    margin: 1rem 0;
    color: #666;
}

/* 特色产品样式 */
.featured-products {
    padding: 5rem 5%;
    background: #fff;
}

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

.product-card {
    background: #fff;
    padding: 1.5rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.product-card:hover {
    transform: translateY(-10px);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 5px;
    margin-bottom: 1rem;
}

.product-card h3 {
    margin: 0.5rem 0;
}

.product-card p {
    color: #666;
    margin-bottom: 1rem;
}

/* 关于我们样式 */
.about {
    padding: 5rem 5%;
    background: #f9f9f9;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.about-text p {
    margin-bottom: 1rem;
    color: #666;
}

/* 品牌优势样式 */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    padding: 5rem 5%;
    background: #fff;
    text-align: center;
}

.feature {
    padding: 2rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.feature:hover {
    transform: translateY(-10px);
}

.feature i {
    font-size: 2.5rem;
    color: #4CAF50;
    margin-bottom: 1rem;
}

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

.feature p {
    color: #666;
}

/* 联系表单样式 */
.contact {
    padding: 5rem 5%;
    background: #f9f9f9;
}

.contact-container {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
}

.contact-info {
    padding: 2rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-info h3 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.contact-info p {
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.contact-info i {
    margin-right: 0.5rem;
    color: #4CAF50;
}

.social-links {
    margin-top: 1.5rem;
}

.social-links a {
    display: inline-block;
    margin-right: 1rem;
    font-size: 1.5rem;
    color: #4CAF50;
    transition: transform 0.3s;
}

.social-links a:hover {
    transform: translateY(-5px);
}

.contact-form {
    padding: 2rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.contact-form form {
    display: flex;
    flex-direction: column;
}

.contact-form input,
.contact-form textarea {
    margin-bottom: 1rem;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
}

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

/* 页脚样式 */
footer {
    background: #333;
    color: #fff;
    padding: 4rem 5% 1rem;
}

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

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

.footer-section p {
    margin-bottom: 1rem;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    transition: color 0.3s;
}

.footer-section ul li a:hover {
    color: #4CAF50;
}

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

.newsletter-form input {
    padding: 0.8rem;
    margin-bottom: 1rem;
    border: none;
    border-radius: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
}

/* 响应式按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    background: #4CAF50;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 1rem;
    border: none;
    cursor: pointer;
    transition: background 0.3s;
}

.btn:hover {
    background: #388E3C;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .contact-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .feature {
        padding: 1.5rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content, .section-title, .category-card, .product-card, .feature, .about-content, .contact-container {
    animation: fadeIn 1s ease-out;
}

/* 产品详情页样式 */
.product-detail {
    padding: 8rem 5% 4rem;
    background: #f9f9f9;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    padding: 2rem;
}

.product-image img {
    width: 100%;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.product-info h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.product-category {
    display: inline-block;
    background: #4CAF50;
    color: white;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    text-transform: capitalize;
}

.product-description, .product-features {
    margin-bottom: 1.5rem;
}

.product-description h3, .product-features h3 {
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
}

.product-features ul {
    padding-left: 1.5rem;
    list-style-type: disc;
}

.product-features li {
    margin-bottom: 0.5rem;
}

.related-products {
    padding: 4rem 5%;
    background: #fff;
}

.product-not-found {
    text-align: center;
    padding: 3rem;
}

.loading {
    text-align: center;
    padding: 3rem;
    font-size: 1.2rem;
    color: #666;
}

.error {
    text-align: center;
    color: #f44336;
    padding: 2rem;
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

/* 响应式调整 */
@media (max-width: 992px) {
    .product-detail-content {
        grid-template-columns: 1fr;
    }
}