/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

.btn {
    display: inline-block;
    background-color: #e63946;
    color: #fff;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s;
}

.btn:hover {
    background-color: #c1121f;
}

.section-title {
    text-align: center;
    margin-bottom: 40px;
    font-size: 28px;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 3px;
    background-color: #e63946;
    margin: 15px auto 0;
}

/* 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;
    right: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo a {
    font-size: 24px;
    font-weight: bold;
    color: #e63946;
    display: flex;
    align-items: center;
}

.logo a i {
    margin-right: 10px;
}

.nav ul {
    display: flex;
}

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

.nav ul li a {
    font-weight: 500;
    transition: color 0.3s;
    position: relative;
}

.nav ul li a:hover,
.nav ul li a.active {
    color: #e63946;
}

.nav ul li a.active::after {
    content: '';
    display: block;
    width: 100%;
    height: 2px;
    background-color: #e63946;
    position: absolute;
    bottom: -5px;
    left: 0;
}

.mobile-nav-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* 英雄区域样式 */
.hero {
    background-image: linear-gradient(rgba(0, 0, 0, 0.4), rgba(0, 0, 0, 0.4)), url('im/source-bg.jpg');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #f5f5f5; /* 更改备选背景色为浅灰色 */
    height: 100vh;
    color: #fff;
    margin-top: 70px;
    display: flex;
}

.hero .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    height: 100%;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
    line-height: 1.2;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    max-width: 700px;
    line-height: 1.6;
}
    color: #fff;
    margin-top: 70px;
}

.hero h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    max-width: 700px;
}

/* 我们的优势样式 */
.advantage {
    padding: 80px 0;
    background-color: #fff;
}

.advantage-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.advantage-card {
    background-color: #f9f9f9;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.advantage-card .icon {
    font-size: 40px;
    color: #e63946;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
}

/* 产品介绍样式 */
.products {
    padding: 80px 0;
    background-color: #f9f9f9;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.product-card {
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

.product-image {
    height: 180px;
    overflow: hidden;
}

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

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

.product-info {
    padding: 15px;
}

.product-info h3 {
    font-size: 16px;
    margin-bottom: 10px;
}

.product-info p {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-price {
    font-size: 16px;
    font-weight: bold;
    color: #e63946;
    margin-bottom: 15px;
}

.product-btn {
    width: 100%;
    text-align: center;
    padding: 8px 0;
    font-size: 14px;
}

/* 新闻资讯样式 */
.news {
    padding: 80px 0;
    background-color: #fff;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.news-card {
    display: flex;
    background-color: #f9f9f9;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

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

.news-image {
    flex: 0 0 30%;
    overflow: hidden;
}

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

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

.news-info {
    flex: 1;
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.news-date {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
}

.news-date i {
    margin-right: 5px;
}

.news-info h3 {
    font-size: 18px;
    margin-bottom: 10px;
}

.news-info p {
    font-size: 14px;
    color: #666;
    margin-bottom: 15px;
    flex: 1;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.read-more {
    font-size: 14px;
    color: #e63946;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
}

.read-more i {
    margin-left: 5px;
    transition: transform 0.3s;
}

.read-more:hover i {
    transform: translateX(5px);
}

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

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.testimonial-card {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.testimonial-rating {
    font-size: 20px;
    color: #f59e0b;
    margin-bottom: 20px;
}

.testimonial-text {
    font-size: 16px;
    color: #666;
    margin-bottom: 30px;
    position: relative;
}

.testimonial-text::before {
    content: '"';
    font-size: 40px;
    color: #e63946;
    opacity: 0.2;
    position: absolute;
    top: -10px;
    left: 10px;
}

.testimonial-text::after {
    content: '"';
    font-size: 40px;
    color: #e63946;
    opacity: 0.2;
    position: absolute;
    bottom: -30px;
    right: 10px;
}

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

.testimonial-author img {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    margin-right: 15px;
}

.author-info h4 {
    font-size: 16px;
    margin-bottom: 5px;
}

.author-info p {
    font-size: 14px;
    color: #666;
}

/* 页脚样式 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0 20px;
}

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

.footer-logo {
    flex: 0 0 30%;
    min-width: 250px;
}

.footer-logo a {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    display: inline-block;
    margin-bottom: 10px;
}

.footer-logo p {
    color: #ccc;
    font-size: 14px;
}

.footer-links {
    display: flex;
    justify-content: space-between;
    flex: 1;
    min-width: 500px;
}

.footer-links-column {
    margin-right: 30px;
}

.footer-links-column h3 {
    font-size: 16px;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #555;
}

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

.footer-links-column ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links-column ul li a:hover {
    color: #fff;
}

.footer-links-column ul li i {
    margin-right: 5px;
}

.footer-bottom {
    /* 友情链接样式 */
    .footer-bottom .friend-links {
        margin-top: 15px;
        text-align: center;
    }
    
    .footer-bottom .friend-links a {
        color: #aaa;
        text-decoration: none;
        transition: color 0.3s;
    }
    
    .footer-bottom .friend-links a:hover {
        color: #fff;
    }
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #555;
    font-size: 14px;
    color: #aaa;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .product-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 992px) {
    .advantage-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .testimonials-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background-color: #fff;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: transform 0.3s;
        z-index: 999;
    }

    .nav.active {
        transform: translateY(0);
    }

    .nav ul {
        flex-direction: column;
        padding: 20px;
    }

    .nav ul li {
        margin: 10px 0;
    }

    .mobile-nav-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 16px;
    }

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

    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .footer-logo {
        margin-bottom: 30px;
    }

    .footer-links {
        min-width: auto;
    }
}

@media (max-width: 576px) {
    .advantage-cards {
        grid-template-columns: 1fr;
    }

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

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

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

    .footer-links-column {
        margin-bottom: 20px;
    }
}