body {
    font-family: -apple-system, BlinkMacSystemFont, "Helvetica Neue", "Segoe UI", sans-serif;
    color: #333;
    max-width: 640px;
    margin: 60px auto;
    padding: 20px;
    text-align: center;
    background-color: #fff;
}

h1 {
    font-size: 2rem;
    font-weight: bold;
    margin-bottom: 10px;
}

.description {
    font-size: 1rem;
    color: #666;
    margin-bottom: 40px;
    line-height: 1.6;
}

.section-title {
    font-size: 1.1rem;
    font-weight: bold;
    margin-top: 40px;
    margin-bottom: 15px;
    border-bottom: 1px solid #eee;
    padding-bottom: 5px;
    display: inline-block;
}

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

li {
    margin: 10px 0;
}

a {
    color: #007AFF;
    text-decoration: none;
    font-size: 1rem;
}

a:hover {
    text-decoration: underline;
}

footer {
    margin-top: 60px;
    font-size: 0.8rem;
    color: #999;
}