/* 重置默认样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 布局容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.site-header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

.site-header .logo h1 {
    font-size: 1.5rem;
    color: #0056b3; /* 科技蓝 */
    font-weight: bold;
}

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

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

.main-nav ul li a {
    text-decoration: none;
    color: #555;
    font-weight: 500;
    transition: color 0.3s;
}

.main-nav ul li a:hover {
    color: #0056b3;
}

/* 首页横幅 (Hero Section) */
.hero-section {
    background: linear-gradient(135deg, #0056b3 0%, #007bff 100%);
    color: #fff;
    text-align: center;
    padding: 100px 0;
}

.hero-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.hero-section p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn-primary {
    display: inline-block;
    padding: 12px 30px;
    background-color: #fff;
    color: #0056b3;
    text-decoration: none;
    border-radius: 5px;
    font-weight: bold;
    transition: background-color 0.3s, color 0.3s;
}

.btn-primary:hover {
    background-color: #e2e6ea;
    color: #004494;
}

/* 内容区块通用样式 */
.content-section {
    padding: 60px 0;
    background-color: #fff;
}

.bg-light {
    background-color: #f8f9fa;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
    color: #333;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: #0056b3;
    margin: 15px auto 0;
}

.section-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.section-content p {
    margin-bottom: 20px;
    font-size: 1.1rem;
    color: #666;
}

/* 业务范围卡片网格 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid #0056b3;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.1);
}

.service-card h3 {
    margin-bottom: 20px;
    color: #0056b3;
    font-size: 1.4rem;
    text-align: center;
}

.service-card ul {
    list-style: none;
    padding-left: 0;
}

.service-card ul li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
    color: #555;
    text-align: center;
}

.service-card ul li:last-child {
    border-bottom: none;
}

/* 联系信息 */
.contact-info {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    text-align: center;
}

.info-item strong {
    display: block;
    margin-bottom: 10px;
    color: #333;
    font-size: 1.2rem;
}

.info-item p {
    color: #666;
}

/* 页脚 */
.site-footer {
    background-color: #343a40;
    color: #fff;
    text-align: center;
    padding: 30px 0;
    margin-top: auto;
}

.site-footer p {
    margin: 5px 0;
    font-size: 0.9rem;
    opacity: 0.8;
}

.icp-info a {
    color: #fff;
    text-decoration: none;
    border-bottom: 1px dashed #aaa;
}

.icp-info a:hover {
    border-bottom: 1px solid #fff;
    opacity: 1;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .site-header .container {
        flex-direction: column;
        text-align: center;
    }
    
    .main-nav ul {
        margin-top: 15px;
        flex-direction: column;
        gap: 10px;
    }

    .main-nav ul li {
        margin-left: 0;
    }
    
    .hero-section h2 {
        font-size: 1.8rem;
    }
}