/* 基础样式 */
body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-image: url('background.jpg'); /* 设置背景图片 */
    background-size: cover;
    background-position: center;
    color: #333;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background: rgba(255, 255, 255, 0.9); /* 半透明白色背景 */
    border-radius: 8px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
}

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

header h1 {
    font-size: 2.5rem;
    color: #4CAF50;
}

nav ul {
    list-style: none;
    padding: 0;
    text-align: center;
    margin-bottom: 20px;
}

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

nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: bold;
    padding: 5px 10px;
    border-radius: 5px;
}

nav ul li a:hover {
    background-color: #4CAF50;
    color: white;
}

nav ul li a.active {
    background-color: #4CAF50;
    color: white;
}

main {
    margin: 20px 0;
}

main h2 {
    font-size: 1.8rem;
    color: #4CAF50;
    margin-bottom: 10px;
}

main p, main ul {
    line-height: 1.6;
}

main ul {
    padding-left: 20px;
}

footer {
    text-align: center;
    margin-top: 20px;
    padding: 10px 0;
    background-color: #4CAF50;
    color: white;
    border-radius: 8px;
}