/* 基本樣式 */
body {
    font-family: Arial, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
}

header {
    background-color: #f0f0f0;
    padding: 10px 0;
    text-align: center;
}

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

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

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

nav ul li a:hover {
    background-color: #ddd;
}

.banner {
    width: 100%;
    max-width: 1200px;
    height: auto;
    display: block;
    margin: 0 auto;
}

main {
    padding: 20px;
}

section {
    margin-bottom: 20px;
}

section img {
    display: block;
    margin: 20px auto;
    max-width: 100%;
    height: auto;
}

footer {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 10px 0;
    position: fixed;
    bottom: 0;
    width: 100%;
}