* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

/* 导航栏样式 */
.navbar {
    background-color: #2c3e50;
    color: #fff;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.logo h1 {
    font-size: 1.8rem;
    font-weight: bold;
}

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

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

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

.nav-menu a:hover {
    color: #3498db;
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background-color: #fff;
    margin: 3px 0;
    transition: 0.3s;
}

/* 英雄区域样式 */
.hero {
    background: linear-gradient(135deg, #3498db, #2c3e50);
    color: #fff;
    padding: 6rem 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.hero-content p {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 12px 30px;
    background-color: #3498db;
    color: #fff;
    text-decoration: none;
    border-radius: 5px;
    font-size: 1rem;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background-color: #3498db;
}

.btn-secondary {
    background-color: #2ecc71;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
}

/* 服务区域样式 */
.services {
    padding: 4rem 0;
    background-color: #fff;
}

.services h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2c3e50;
}

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

.service-item {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s ease;
}

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

.service-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

/* 项目预览样式 */
.projects-preview {
    padding: 4rem 0;
    background-color: #f4f4f4;
    text-align: center;
}

.projects-preview h3 {
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-item {
    background-color: #fff;
    padding: 2rem;
    border-radius: 10px;
    text-align: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

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

.project-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

/* 页脚样式 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    text-align: center;
    padding: 2rem 0;
}

/* 项目详情页面样式 */
.projects {
    padding: 4rem 0;
    background-color: #fff;
}

.projects h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.projects-detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-detail-item {
    background-color: #f8f9fa;
    padding: 2rem;
    border-radius: 10px;
    transition: transform 0.3s ease;
}

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

.project-detail-item h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: #3498db;
}

.project-detail-item p {
    margin-bottom: 1rem;
    color: #666;
}

/* 关于我们页面样式 */
.about {
    padding: 4rem 0;
    background-color: #f4f4f4;
}

.about h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: #fff;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.about-content h4 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #3498db;
}

.about-content p {
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* 联系我们页面样式 */
.contact {
    padding: 4rem 0;
    background-color: #fff;
}

.contact h3 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 3rem;
    color: #2c3e50;
}

.contact-content {
    max-width: 800px;
    margin: 0 auto;
    background-color: #f8f9fa;
    padding: 3rem;
    border-radius: 10px;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.contact-item {
    text-align: center;
}

.contact-item h4 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: #2c3e50;
}

.contact-form {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #2c3e50;
    font-weight: bold;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 1rem;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 60px;
        flex-direction: column;
        background-color: #2c3e50;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-menu li {
        margin: 2.5rem 0;
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .services-grid,
    .projects-grid,
    .projects-detail-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .contact-content {
        padding: 2rem;
    }
}