* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Poppins', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

/* 导航栏样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: white;
    font-size: 1.8rem;
    font-weight: 700;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: #ffd700;
    transform: translateY(-2px);
}

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1001;
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 0.8rem 1.5rem;
    color: #333;
    text-decoration: none;
    transition: all 0.3s ease;
    min-width: 150px;
}

.dropdown-menu li a:hover {
    background: #f0f2f5;
    color: #667eea;
    padding-left: 1.8rem;
}

/* 移动端菜单按钮 */
.hamburger {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}

.bar {
    width: 25px;
    height: 3px;
    background: white;
    border-radius: 3px;
    transition: all 0.3s ease;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.btn-secondary {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-secondary:hover {
    background: #667eea;
    color: white;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
    padding: 0.6rem 1.2rem;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

/* 英雄区域 */
.hero {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 4rem 5%;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    min-height: 80vh;
}

.hero-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1rem;
    line-height: 1.2;
}

.hero-content p {
    font-size: 1.2rem;
    color: #4a5568;
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
}

.hero-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease;
}

.hero-image img:hover {
    transform: scale(1.05);
}

/* 产品类别 */
.categories {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.categories h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 3rem;
}

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

.category-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.category-card i {
    font-size: 3rem;
    color: #667eea;
    margin-bottom: 1rem;
}

.category-card h4 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.category-card p {
    color: #4a5568;
    margin-bottom: 1.5rem;
}

/* 产品展示 */
.featured-products {
    padding: 4rem 5%;
    background: #f5f7fa;
}

.featured-products h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 3rem;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.product-image {
    height: 200px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.1);
}

.product-info {
    padding: 1.5rem;
}

.product-info h4 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 0.5rem;
}

.product-info p {
    color: #4a5568;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.product-price {
    margin-bottom: 1.5rem;
}

.price {
    font-size: 1.3rem;
    font-weight: 700;
    color: #667eea;
}

/* 关于我们 */
.about-us {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.about-content h3 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1.5rem;
}

.about-content p {
    color: #4a5568;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.feature {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: #667eea;
    font-weight: 500;
}

.feature i {
    font-size: 1.2rem;
}

.about-image img {
    width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* 联系信息 */
.contact-info {
    padding: 4rem 5%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
}

.contact-item {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-item:hover {
    transform: translateY(-5px);
    background: rgba(255, 255, 255, 0.15);
}

.contact-item i {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.contact-item h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.contact-item p {
    opacity: 0.9;
}

/* 页脚 */
.footer {
    background: #2d3748;
    color: white;
    padding: 3rem 5% 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    max-width: 1200px;
    margin: 0 auto 2rem;
}

.footer-section h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: #667eea;
}

.footer-section p {
    opacity: 0.8;
    margin-bottom: 1.5rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: #667eea;
    transform: translateY(-3px);
}

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

.footer-section ul li {
    margin-bottom: 0.8rem;
}

.footer-section ul li a {
    color: white;
    text-decoration: none;
    opacity: 0.8;
    transition: all 0.3s ease;
}

.footer-section ul li a:hover {
    color: #667eea;
    padding-left: 5px;
    opacity: 1;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    opacity: 0.7;
    font-size: 0.9rem;
}

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

.footer-bottom p:last-child {
    margin-bottom: 0;
}

/* 产品列表页面 */
.products-page {
    padding: 3rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.products-page h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: center;
}

/* 产品详情页面 */
.product-detail {
    padding: 3rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.product-detail-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
}

.product-detail-info h1 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 1rem;
}

.product-detail-info .price {
    font-size: 1.5rem;
    margin-bottom: 2rem;
}

.product-description {
    margin-bottom: 2rem;
    color: #4a5568;
    line-height: 1.8;
}

.product-specs {
    background: #f5f7fa;
    padding: 1.5rem;
    border-radius: 8px;
    margin-bottom: 2rem;
}

.product-specs h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2d3748;
    margin-bottom: 1rem;
}

.specs-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.spec-label {
    color: #4a5568;
    font-weight: 500;
}

.spec-value {
    color: #667eea;
    font-weight: 600;
}

/* 联系我们页面 */
.contact-page {
    padding: 3rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.contact-page h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: center;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #2d3748;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: all 0.3s ease;
    font-family: 'Poppins', sans-serif;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

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

/* 关于我们页面 */
.about-page {
    padding: 3rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.about-page h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
    text-align: center;
}

.about-page p {
    color: #4a5568;
    margin-bottom: 1.5rem;
    line-height: 1.8;
    text-align: center;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 响应式设计 */
@media (max-width: 768px) {
    /* 移动端导航 */
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: white;
        width: 100%;
        text-align: center;
        transition: all 0.3s ease;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        color: #333;
        padding: 1rem 0;
    }

    .dropdown-menu {
        position: static;
        background: #f5f7fa;
        box-shadow: none;
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        display: none;
    }

    .dropdown:hover .dropdown-menu {
        display: block;
    }

    .dropdown-menu li a {
        min-width: auto;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    /* 移动端布局调整 */
    .hero {
        grid-template-columns: 1fr;
        text-align: center;
        padding: 2rem 5%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .about-us {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .product-detail-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    .about-content h3,
    .categories h3,
    .featured-products h3 {
        font-size: 1.5rem;
    }

    .specs-list {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .hero-content h2 {
        font-size: 1.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        text-align: center;
    }

    .product-grid,
    .category-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .social-links {
        justify-content: center;
    }
}

/* 最新资讯 */
.latest-news {
    padding: 4rem 5%;
    background: #f5f7fa;
}

.latest-news h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    color: #2d3748;
    margin-bottom: 2rem;
}

.latest-news .news-list {
    max-width: 1200px;
    margin: 0 auto;
}

.news-item {
    background: white;
    padding: 1.5rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: all 0.3s ease;
}

.news-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
}

.news-item .news-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.8rem;
    font-size: 0.9rem;
}

.news-item .news-category {
    color: #667eea;
    font-weight: 500;
}

.news-item .news-date {
    color: #718096;
}

.news-item h4 {
    margin-bottom: 0.5rem;
}

.news-item .news-title {
    color: #2d3748;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    transition: color 0.3s ease;
}

.news-item .news-title:hover {
    color: #667eea;
}

.news-item p {
    color: #4a5568;
    margin: 0;
    line-height: 1.6;
    font-size: 0.95rem;
}

/* 动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-content,
.hero-image,
.category-card,
.product-card,
.about-content,
.about-image,
.contact-item,
.news-item {
    animation: fadeInUp 0.6s ease-out;
}

.category-card:nth-child(2),
.product-card:nth-child(2),
.news-item:nth-child(2) {
    animation-delay: 0.1s;
}

.category-card:nth-child(3),
.product-card:nth-child(3),
.news-item:nth-child(3) {
    animation-delay: 0.2s;
}

.category-card:nth-child(4),
.product-card:nth-child(4) {
    animation-delay: 0.3s;
}