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

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

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: #333;
}

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

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

nav ul li a:hover {
    color: #007bff;
}

main {
    margin-top: 80px;
}

section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.hero {
    background-color: #f8f9fa;
    text-align: center;
    padding: 6rem 2rem;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: #333;
}

.hero p {
    font-size: 1.2rem;
    color: #666;
}

.about, .contact {
    padding: 4rem 2rem;
}

h2 {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: #333;
}

.about-content, .contact-info {
    max-width: 800px;
    margin: 0 auto;
}

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

footer {
    background-color: #333;
    color: #fff;
    padding: 2rem;
    text-align: center;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-content p {
    margin-bottom: 0.5rem;
}

.footer-content a {
    color: #fff;
    text-decoration: none;
}

.footer-content a:hover {
    text-decoration: underline;
}

@media (max-width: 768px) {
    nav {
        flex-direction: column;
        text-align: center;
    }

    nav ul {
        margin-top: 1rem;
    }

    nav ul li {
        margin: 0 1rem;
    }

    .hero {
        padding: 4rem 1rem;
    }

    .hero h1 {
        font-size: 2rem;
    }
}