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

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    padding-top: 80px; /* 添加顶部内边距，避免内容被头部遮挡 */
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

/* 头部样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
}

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

.logo img {
    max-height: 50px;
}

.nav {
    display: flex;
    align-items: center;
}

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

.nav-item {
    margin-left: 30px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
    padding: 10px 0;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: #007bff;
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: #007bff;
}

.hamburger {
    display: none;
    cursor: pointer;
}

.bar {
    display: block;
    width: 25px;
    height: 3px;
    margin: 5px auto;
    transition: all 0.3s ease;
    background-color: #333;
}

/* 英雄区域样式 */
.hero {
    height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 60px;
}

.hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    color: #212529;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    color: #6c757d;
}

.btn {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 24px;
    border-radius: 4px;
    text-decoration: none;
    transition: background-color 0.3s;
    font-weight: 500;
}

.btn:hover {
    background-color: #0056b3;
}

/* 通用部分样式 */
.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 2rem;
    color: #212529;
    padding-top: 2rem;
}

/* 产品部分样式 */
.products {
    padding: 80px 0;
}

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

.product-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.product-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    display: block;
}

.product-card h3 {
    padding: 15px;
    font-size: 1.2rem;
    color: #212529;
    margin: 0;
}

.product-card p {
    padding: 0 15px 15px;
    color: #6c757d;
    font-size: 0.95rem;
    flex-grow: 1;
    margin: 0;
}

.price {
    padding: 0 15px 15px;
    font-size: 1.2rem;
    font-weight: bold;
    color: #dc3545;
    margin: 0;
}

.product-btn {
    margin: 0 15px 15px;
    width: calc(100% - 30px);
    text-align: center;
}

/* 产品特色部分样式 */
.features {
    padding: 80px 0;
}

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

.feature-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    text-align: center;
    transition: transform 0.3s;
}

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

.feature-card i {
    font-size: 2.5rem;
    color: #007bff;
    margin-bottom: 15px;
}

.feature-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: #212529;
}

.feature-card p {
    color: #6c757d;
}

/* 新闻资讯部分样式 */
.news {
    padding: 80px 0;
}

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

.news-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

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

.news-content {
    padding: 20px;
}

.news-date {
    display: inline-block;
    background-color: #f8f9fa;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.85rem;
    color: #6c757d;
    margin-bottom: 10px;
}

.news-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: #212529;
}

.news-content p {
    color: #6c757d;
    margin-bottom: 15px;
    font-size: 0.95rem;
}

.read-more {
    color: #007bff;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
}

.read-more:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 用户评价部分样式 */
.testimonials {
    padding: 80px 0;
}

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

.testimonial-card {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

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

.testimonial-header img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

.user-info h3 {
    font-size: 1.1rem;
    color: #212529;
}

.rating {
    color: #ffc107;
}

.testimonial-card p {
    color: #6c757d;
    font-size: 0.95rem;
    line-height: 1.7;
}

/* 友情链接样式 */
.friendship-links {
    padding: 40px 0;
    border-top: 1px solid #e9ecef;
}

.links-title {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: #212529;
    text-align: center;
}

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

.link-item {
    color: #007bff;
    text-decoration: none;
    transition: color 0.3s;
    font-size: 0.95rem;
}

.link-item:hover {
    color: #0056b3;
    text-decoration: underline;
}

/* 页脚样式 */
.footer {
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.footer-logo {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
}

.footer-logo img {
    max-height: 60px;
    margin-bottom: 15px;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
}

.footer-links {
    flex: 1;
    min-width: 200px;
    margin-bottom: 30px;
}

.footer-contact {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
}

.footer-links h4, .footer-contact h4 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: #fff;
}

.footer-links ul, .footer-contact ul {
    list-style: none;
}

.footer-links li, .footer-contact li {
    margin-bottom: 10px;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: #007bff;
}

.footer-contact li {
    display: flex;
    align-items: flex-start;
    color: rgba(255, 255, 255, 0.7);
}

.footer-contact i {
    margin-right: 10px;
    margin-top: 3px;
    color: #007bff;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 响应式样式 */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 80px;
        flex-direction: column;
        background-color: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
    }

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

    .nav-item {
        margin: 1.5rem 0;
    }

    .hamburger {
        display: block;
    }

    .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);
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .product-grid, .features-grid, .news-grid, .testimonials-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    }
}

@media screen and (max-width: 576px) {
    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

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

    .footer-content {
        flex-direction: column;
    }

    .links-container {
        flex-direction: column;
        align-items: center;
    }
}