/* 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;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 15px;
}

h1 {
    font-size: 3rem;
}

h2 {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

h2:after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: #e74c3c;
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
}

p {
    margin-bottom: 15px;
}

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

section {
    padding: 80px 0;
}

.btn {
    display: inline-block;
    background-color: #e74c3c;
    color: #fff;
    padding: 12px 30px;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn:hover {
    background-color: #c0392b;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-small {
    padding: 8px 20px;
    font-size: 0.9rem;
    display: inline-block;
    background-color: #e74c3c;
    color: #fff;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background-color: #c0392b;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.logo img {
    height: 40px;
}

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

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

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #e74c3c;
}

.menu-toggle {
    display: none;
    font-size: 1.5rem;
    cursor: pointer;
}

/* 首页横幅 */
.hero {
    background-size: cover;
    background-position: center;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: #fff;
    padding-top: 80px;
}

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

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero p {
    font-size: 1.5rem;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

/* 关于我们 */
.about {
    background-color: #f9f9f9;
}

.about-content {
    display: flex;
    align-items: center;
    gap: 40px;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 1;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 产品系列 */
.product-categories {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.category {
    flex: 1;
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

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

.category h3 {
    padding: 20px 20px 10px;
}

.category p {
    padding: 0 20px 20px;
    color: #666;
}

.category .btn-small {
    margin: 0 20px 20px;
}

/* 热门产品 */
.featured-products {
    background-color: #f9f9f9;
}

.product-slider {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    scrollbar-width: none; /* Firefox */
}

.product-slider::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
}

.product {
    flex: 0 0 300px;
    background-color: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    scroll-snap-align: start;
}

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

.product h3 {
    padding: 20px 20px 10px;
}

.product p {
    padding: 0 20px 10px;
    color: #666;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    padding: 0 20px 20px;
    gap: 10px;
}

.product-features span {
    background-color: #f0f0f0;
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: #666;
}

/* 产品特点 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature {
    text-align: center;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.feature i {
    font-size: 3rem;
    color: #e74c3c;
    margin-bottom: 20px;
}

/* 用户评价 */
.testimonials {
    background-color: #f9f9f9;
}

.testimonial-slider {
    display: flex;
    gap: 30px;
    overflow-x: auto;
    padding: 20px 0;
    scroll-snap-type: x mandatory;
    scrollbar-width: none;
}

.testimonial-slider::-webkit-scrollbar {
    display: none;
}

.testimonial {
    flex: 0 0 400px;
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    scroll-snap-align: start;
}

.testimonial-content {
    margin-bottom: 20px;
}

.testimonial-content p {
    font-style: italic;
    color: #666;
}

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

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

.testimonial-author h4 {
    margin-bottom: 5px;
}

.testimonial-author p {
    color: #666;
    font-size: 0.9rem;
    margin: 0;
}

/* 联系我们 */
.contact {
    background-color: #f9f9f9;
}

.contact-content {
    display: flex;
    gap: 40px;
}

.contact-info {
    flex: 1;
}

.info-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 30px;
}

.info-item i {
    font-size: 1.5rem;
    color: #e74c3c;
    margin-right: 20px;
    margin-top: 5px;
}

.info-item h3 {
    margin-bottom: 5px;
}

.social-media {
    margin-top: 30px;
}

.social-media a {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: #e74c3c;
    color: #fff;
    border-radius: 50%;
    text-align: center;
    line-height: 40px;
    margin-right: 10px;
    transition: all 0.3s ease;
}

.social-media a:hover {
    background-color: #c0392b;
    transform: translateY(-3px);
}

.contact-form {
    flex: 1;
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #e74c3c;
}

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

/* 页脚 */
footer {
    background-color: #222;
    color: #fff;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo img {
    height: 40px;
    margin-bottom: 15px;
}

.footer-logo p {
    color: #aaa;
}

.footer-links {
    display: flex;
    gap: 40px;
}

.link-group h3 {
    color: #fff;
    margin-bottom: 20px;
    position: relative;
}

.link-group h3:after {
    content: '';
    display: block;
    width: 30px;
    height: 3px;
    background: #e74c3c;
    position: absolute;
    bottom: -10px;
    left: 0;
}

.link-group ul {
    list-style: none;
}

.link-group li {
    margin-bottom: 10px;
}

.link-group a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: #e74c3c;
}

.copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #444;
    color: #aaa;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 1024px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .hero h1 {
        font-size: 3rem;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    section {
        padding: 60px 0;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 70px;
        left: -100%;
        width: 100%;
        background-color: #fff;
        flex-direction: column;
        box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
        transition: all 0.3s ease;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 0;
        text-align: center;
        padding: 15px;
        border-bottom: 1px solid #eee;
    }
    
    .about-content {
        flex-direction: column;
    }
    
    .product-categories {
        flex-direction: column;
    }
    
    .contact-content {
        flex-direction: column;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 30px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 20px;
    }
    
    .link-group {
        flex: 1 0 40%;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .product {
        flex: 0 0 250px;
    }
    
    .testimonial {
        flex: 0 0 300px;
    }
    
    .partner-logos img {
        height: 40px;
    }
}