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

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

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

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

.logo {
    text-decoration: none;
    color: #2c3e50;
}

.logo h1 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 5px;
}

.logo span {
    font-size: 14px;
    color: #7f8c8d;
}

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

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

.nav-links a {
    text-decoration: none;
    color: #2c3e50;
    font-weight: 500;
    transition: color 0.3s;
}

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

.btn-call {
    background-color: #e74c3c;
    color: white !important;
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 600;
}

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

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

/* 首页横幅 */
.hero {
    background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), 
                url('https://images.unsplash.com/photo-1486496572940-2bb2341fdbdf?ixlib=rb-4.0.3&auto=format&fit=crop&w=1920&q=80');
    background-size: cover;
    background-position: center;
    color: white;
    padding: 180px 0 100px;
    margin-top: 80px;
    text-align: center;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 40px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn-primary, .btn-secondary {
    padding: 15px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    font-size: 18px;
    transition: all 0.3s;
    display: inline-block;
}

.btn-primary {
    background-color: #e74c3c;
    color: white;
    border: 2px solid #e74c3c;
}

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

.btn-secondary {
    background-color: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background-color: white;
    color: #2c3e50;
}

/* 通用标题样式 */
.section-title {
    font-size: 36px;
    text-align: center;
    margin-bottom: 15px;
    color: #2c3e50;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 50px;
    font-size: 18px;
}

/* 服务项目 */
.services {
    padding: 100px 0;
    background-color: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.service-card {
    background-color: #f8f9fa;
    padding: 40px 30px;
    border-radius: 10px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
    border: 1px solid #e9ecef;
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
    font-size: 48px;
    color: #e74c3c;
    margin-bottom: 20px;
}

.service-card h3 {
    font-size: 24px;
    margin-bottom: 15px;
    color: #2c3e50;
}

.service-card p {
    color: #7f8c8d;
    line-height: 1.8;
}

/* 关于我们 */
.about {
    padding: 100px 0;
    background-color: #f8f9fa;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    margin-bottom: 20px;
    font-size: 18px;
    line-height: 1.8;
}

.features {
    margin-top: 30px;
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px;
}

.feature {
    display: flex;
    align-items: center;
    gap: 10px;
}

.feature i {
    color: #27ae60;
    font-size: 20px;
}

.about-image img {
    width: 100%;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* 联系我们 */
.contact {
    padding: 100px 0;
    background-color: white;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    margin-top: 50px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.info-item {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.info-item i {
    font-size: 24px;
    color: #e74c3c;
    margin-top: 5px;
}

.info-item h3 {
    font-size: 20px;
    margin-bottom: 5px;
    color: #2c3e50;
}

.contact-form {
    background-color: #f8f9fa;
    padding: 40px;
    border-radius: 10px;
}

.contact-form h3 {
    font-size: 24px;
    margin-bottom: 30px;
    color: #2c3e50;
}

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: 'Noto Sans SC', sans-serif;
    font-size: 16px;
}

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

/* 底部 */
.footer {
    background-color: #2c3e50;
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

.footer-links h4,
.footer-social h4 {
    font-size: 20px;
    margin-bottom: 20px;
}

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

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

.footer-links a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: white;
}

.social-icons {
    display: flex;
    gap: 15px;
    margin-bottom: 15px;
}

.social-icons a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #34495e;
    border-radius: 50%;
    color: white;
    font-size: 20px;
    transition: background-color 0.3s;
}

.social-icons a:hover {
    background-color: #e74c3c;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
    font-size: 14px;
}

.footer-bottom p {
    margin-bottom: 5px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero-content h2 {
        font-size: 36px;
    }
    
    .hero-content p {
        font-size: 18px;
    }
    
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .menu-toggle {
        display: block;
    }
    
    .hero {
        padding: 150px 0 80px;
    }
    
    .hero-content h2 {
        font-size: 28px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn-primary,
    .btn-secondary {
        width: 100%;
        max-width: 300px;
        text-align: center;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .features {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
}