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

body {
    font-family: 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
}

/* 导航栏样式 */
header {
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

.logo h1 {
    color: #2c3e50;
    font-size: 1.5rem;
}

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

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

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

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

/* 主要内容区域 */
main {
    margin-top: 80px;
}

section {
    padding: 4rem 5%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 英雄区域 */
.hero {
    background: linear-gradient(rgba(0,0,0,0.5), rgba(0,0,0,0.5));
    background-size: cover;
    background-position: center;
    color: white;
    text-align: center;
    padding: 8rem 5%;
}

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

.cta-button {
    background-color: #3498db;
    color: white;
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    border-radius: 5px;
    cursor: pointer;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: #2980b9;
}

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

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

/* 服务项目 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.service-card {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

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

/* 成功案例 */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.case-card {
    background-color: white;
    padding: 2rem;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.contact-info {
    text-align: center;
    margin-top: 2rem;
}

/* 页脚 */
footer {
    background-color: #2c3e50;
    color: white;
    text-align: center;
    padding: 2rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    nav {
        flex-direction: column;
        padding: 1rem;
    }

    .nav-links {
        margin-top: 1rem;
        flex-direction: column;
        text-align: center;
    }

    .nav-links li {
        margin: 0.5rem 0;
    }

    .hero-content h2 {
        font-size: 2rem;
    }

    section {
        padding: 2rem 5%;
    }
}