/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Arial', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f4f4f4;
}

/* 容器样式 */
.container {
    width: 80%;
    margin: 0 auto;
    overflow: hidden;
}

/* 导航栏样式 */
nav {
    background-color: #333;
    color: #fff;
    padding: 1rem 0;
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

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

nav .logo h1 {
    font-size: 1.5rem;
    color: #f4f4f4;
}

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

nav .nav-links li {
    margin-left: 2rem;
}

nav .nav-links a {
    color: #fff;
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.3s ease;
}

nav .nav-links a:hover {
    color: #ff6b6b;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)), url('https://images.unsplash.com/photo-1571114181665-d28888e0b476?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80') center center/cover no-repeat;
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    color: #fff;
    padding-top: 60px;
}

.hero h2 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    background-color: #ff6b6b;
    color: #fff;
    padding: 0.8rem 1.5rem;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #ee5a52;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
}

/* 特色服务样式 */
.features {
    padding: 4rem 0;
    background-color: #fff;
}

.features h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    background-color: #f9f9f9;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.feature-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

/* 热门产品和产品展示样式 */
.popular-products, .products {
    padding: 4rem 0;
    background-color: #f4f4f4;
}

.popular-products h3, .products h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.product-intro {
    text-align: center;
    font-size: 1.1rem;
    margin-bottom: 3rem;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* 系统优势样式 */
.system-advantages, .application-scenarios {
    margin-top: 4rem;
}

.system-advantages h3, .application-scenarios h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 4rem;
}

.advantage-item {
    text-align: center;
    padding: 1.5rem;
    background-color: #f9f9f9;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

.advantage-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #333;
}

/* 应用场景样式 */
.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.scenario-item {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

.scenario-item:hover {
    transform: translateY(-5px);
}

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

.scenario-item h4 {
    padding: 1rem;
    font-size: 1.2rem;
    color: #333;
}

.scenario-item p {
    padding: 0 1rem 1rem;
    color: #666;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.product-item {
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: transform 0.3s ease;
}

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

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

.product-item h3, .product-item h4 {
    padding: 1rem;
    font-size: 1.2rem;
    color: #333;
}

.product-item p {
    padding: 0 1rem;
    color: #666;
    margin-bottom: 1rem;
}

.product-item .price {
    display: block;
    padding: 0 1rem;
    font-size: 1.3rem;
    font-weight: bold;
    color: #ff6b6b;
    margin-bottom: 1rem;
}

.product-item .btn {
    margin: 0 1rem 1rem;
    display: block;
    text-align: center;
}

/* 关于我们样式 */
.about {
    padding: 4rem 0;
    background-color: #fff;
}

.about h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: center;
}

.about-text h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.about-text p {
    margin-bottom: 1rem;
    color: #666;
}

.about-image img {
    width: 100%;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

/* 联系我们样式 */
.contact {
    padding: 4rem 0;
    background-color: #f4f4f4;
}

.contact h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.contact-info h3, .contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.contact-info p {
    margin-bottom: 1rem;
    color: #666;
}

.contact-form form {
    background-color: #fff;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
}

/* 验证码样式 */
.captcha-container {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.captcha-container input {
    flex: 1;
}

.captcha-image {
    width: 120px;
    height: 40px;
    border: 1px solid #ddd;
    border-radius: 5px;
    cursor: pointer;
    background-color: #f9f9f9;
}

.form-group small {
    display: block;
    margin-top: 0.5rem;
    color: #666;
    font-size: 0.8rem;
}

/* 页脚样式 */
footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 1.5rem 0;
    margin-top: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        width: 95%;
    }
    
    nav .container {
        flex-direction: column;
    }
    
    nav .nav-links {
        margin-top: 1rem;
    }
    
    nav .nav-links li {
        margin: 0 1rem;
    }
    
    .hero h2 {
        font-size: 2rem;
    }
    
    .features-grid, .products-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content, .contact-content {
        grid-template-columns: 1fr;
    }
    
    .about-image {
        margin-top: 2rem;
    }
}