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

body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    background-color: #f4f4f4;
    color: #333;
}

.container {
    width: 80%;
    margin: auto;
    overflow: hidden;
}

/* 头部样式 */
header {
    background: #333;
    color: #fff;
    padding: 10px 0;
    text-align: center;
}

header h1 {
    margin: 0;
}

nav ul {
    list-style: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 10px;
}

nav ul li a {
    color: #fff;
    text-decoration: none;
}

/* 各部分样式 */
.about-section,
.services-section,
.contact-section {
    padding: 20px 0;
    background: #fff;
    margin-bottom: 20px;
}

h2 {
    text-align: center;
    margin-bottom: 20px;
}

.service {
    margin: 20px 0;
}

footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
}

/* 响应式设计 */
@media screen and (max-width: 768px) {
    .container {
        width: 90%;
    }

    nav ul li {
        display: block;
        text-align: center;
        margin: 10px 0;
    }

    header h1 {
        font-size: 24px;
    }

    h2 {
        font-size: 22px;
    }
}

@media screen and (max-width: 480px) {
    header h1 {
        font-size: 18px;
    }

    h2 {
        font-size: 18px;
    }

    .service {
        font-size: 16px;
    }
}