/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

/* 容器样式 */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
.header {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 20px 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: white;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.nav-menu ul {
    display: flex;
    list-style: none;
    gap: 20px;
}

.nav-link {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    background: rgba(255, 255, 255, 0.2);
}

.nav-link.active {
    background: rgba(255, 255, 255, 0.3);
    font-weight: 700;
}

.menu-toggle {
    display: none;
    cursor: pointer;
}

.menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background: white;
    margin: 5px 0;
    transition: all 0.3s ease;
}

/* 首页大图 */
.hero {
    height: 100vh;
    min-height: 600px;
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                url('#hero-background') center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    margin-top: 80px;
    position: relative;
}

.hero-content {
    color: white;
    max-width: 800px;
    padding: 0 20px;
}

.hero-content h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.5);
    background: linear-gradient(45deg, #f3ec78, #af4261);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
    padding: 15px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 242, 254, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 242, 254, 0.6);
}

/* 通用区块样式 */
.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    position: relative;
    color: #333;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    margin: 15px auto 0;
    border-radius: 2px;
}

/* 产品介绍 */
.products {
    padding: 80px 0;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.products .section-title {
    color: white;
}

.products .section-title::after {
    background: white;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 20px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 10px;
    margin-bottom: 15px;
    background: rgba(255, 255, 255, 0.2);
}

.product-card h3 {
    font-size: 1.5rem;
    margin-bottom: 10px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.2);
}

.product-card p {
    margin-bottom: 15px;
    opacity: 0.9;
}

.product-card .price {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 15px;
    border-radius: 20px;
    font-weight: 700;
}

/* 产品特色 */
.features {
    padding: 80px 0;
    background: linear-gradient(135deg, #a1c4fd 0%, #c2e9fb 100%);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

.feature-item {
    text-align: center;
    padding: 30px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: inline-block;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.feature-item p {
    color: #666;
    font-size: 1.05rem;
}

/* 新闻资讯 */
.news {
    padding: 80px 0;
    background: linear-gradient(135deg, #84fab0 0%, #8fd3f4 100%);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
}

.news-item {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.news-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.news-item img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.news-content {
    padding: 20px;
}

.news-content h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #333;
}

.news-date {
    color: #999;
    font-size: 0.9rem;
    margin-bottom: 10px;
    display: block;
}

.news-content p {
    color: #666;
}

/* 用户评价 */
.reviews {
    padding: 80px 0;
    background: linear-gradient(135deg, #fbc2eb 0%, #a6c1ee 100%);
}

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

.review-card {
    background: white;
    border-radius: 15px;
    padding: 30px;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.review-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.review-header img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: #f0f0f0;
}

.reviewer-info h4 {
    font-size: 1.1rem;
    color: #333;
    margin-bottom: 5px;
}

.stars {
    color: #ffd700;
    font-size: 1rem;
}

.review-card p {
    color: #666;
    line-height: 1.6;
    font-style: italic;
}

/* 友情链接 */
.footer {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 50px 0 20px;
}

.friend-links {
    margin-bottom: 30px;
}

.friend-links h3 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    text-align: center;
}

.links-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
}

.friend-link {
    color: white;
    text-decoration: none;
    padding: 8px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.friend-link:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.2);
    color: rgba(255, 255, 255, 0.8);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
        transition: 0.3s;
        padding: 20px 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero-content h2 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .products-grid,
    .features-grid,
    .news-grid,
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    
    .hero {
        height: auto;
        min-height: 70vh;
    }
}

@media (max-width: 480px) {
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .product-card,
    .feature-item,
    .news-item,
    .review-card {
        padding: 15px;
    }
}

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

.product-card,
.feature-item,
.news-item,
.review-card {
    animation: fadeInUp 0.5s ease-out;
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
.lazy {
    opacity: 0;
    transition: opacity 0.3s ease;
}

.lazy.loaded {
    opacity: 1;
}

/* 滚动条样式 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a67d8 0%, #6b46c1 100%);
}

/* 工具类 */
.text-center {
    text-align: center;
}

.mt-50 {
    margin-top: 50px;
}

.mb-50 {
    margin-bottom: 50px;
}