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

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

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

.navbar {
    background: #fff;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

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

.logo img {
    height: 40px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

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

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

.admin-link {
    background: #e74c3c;
    color: #fff;
    padding: 8px 16px;
    border-radius: 4px;
    transition: background 0.3s;
}

.admin-link:hover {
    background: #c0392b;
}

.banner {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    padding: 150px 0 100px;
    text-align: center;
}

.banner h1 {
    font-size: 48px;
    margin-bottom: 20px;
}

.banner p {
    font-size: 20px;
    opacity: 0.9;
}

section {
    padding: 80px 0;
}

.about {
    background: #f9f9f9;
}

.about h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
}

.about p {
    max-width: 800px;
    margin: 0 auto 20px;
    text-align: center;
    font-size: 16px;
    color: #666;
}

.services h2 {
    text-align: center;
    font-size: 36px;
    margin-bottom: 40px;
}

.service-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.service-item {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
    transition: transform 0.3s;
}

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

.service-item h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: #333;
}

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

.cta {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    text-align: center;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: #fff;
    color: #667eea;
    text-decoration: none;
    border-radius: 4px;
    font-weight: 500;
    transition: background 0.3s;
}

.btn:hover {
    background: #f0f0f0;
}

.footer {
    background: #333;
    color: #fff;
    padding: 30px 0;
    text-align: center;
}

.footer p {
    opacity: 0.8;
}

@media (max-width: 768px) {
    .navbar .container {
        flex-direction: column;
        gap: 15px;
    }

    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
        gap: 15px;
    }

    .banner h1 {
        font-size: 32px;
    }

    .banner p {
        font-size: 16px;
    }

    section {
        padding: 60px 0;
    }
}