body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    max-width: 800px;
    margin: 0 auto;
    padding: 40px 20px;
    background-color: #f9f9f9;
}

.container {
    background-color: #fff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.05);
}

h1 {
    color: #2c3e50;
    font-size: 2.2rem;
    margin-bottom: 0.5rem;
    text-align: center;
}

.update-date {
    text-align: center;
    color: #888;
    font-size: 0.9rem;
    margin-bottom: 40px;
}

h2 {
    color: #34495e;
    margin-top: 30px;
    border-bottom: 2px solid #eee;
    padding-bottom: 10px;
}

p {
    margin-bottom: 1rem;
}

ul {
    margin-bottom: 1rem;
    padding-left: 20px;
}

footer {
    margin-top: 50px;
    text-align: center;
    font-size: 0.8rem;
    color: #aaa;
}

.back-link {
    display: inline-block;
    margin-bottom: 20px;
    color: #4CAF50;
    text-decoration: none;
    font-weight: bold;
}

.back-link:hover {
    text-decoration: underline;
}