body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    line-height: 1.8;
    margin: 0;
    padding: 2em;
    background-color: #f8f9fa;
    color: #343a40;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background: #fff;
    padding: 2em 3em 3em 3em;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    text-align: center; /* 中央揃え */
}

h1 {
    color: #212529;
    font-size: 2.5em;
    margin-bottom: 0.2em;
}

h2 {
    color: #212529;
    border-bottom: 2px solid #dee2e6;
    padding-bottom: 0.5em;
    margin-top: 2.5em; /* セクション間の余白 */
    margin-bottom: 1.5em;
    text-align: left; /* 見出しは左揃え */
}

p {
    text-align: left; /* 段落は左揃え */
    color: #495057;
}

img {
    max-width: 100%;
    height: auto;
    border-radius: 4px;
    margin-top: 1em;
    margin-bottom: 1em;
}

.cta-button {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 24px;
    border-radius: 5px;
    text-decoration: none;
    font-size: 1.1em;
    font-weight: bold;
    margin-top: 1.5em;
    transition: background-color 0.3s ease;
}

.cta-button:hover {
    background-color: #0056b3;
}

footer {
    margin-top: 3em;
    padding-top: 1.5em;
    border-top: 1px solid #dee2e6;
    font-size: 0.9em;
    color: #6c757d;
}

footer a {
    color: #007bff;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.language-switch {
    text-align: right;
    margin-bottom: 1em;
    font-size: 0.9em;
}

.language-switch a {
    color: #007bff;
    text-decoration: none;
}

.language-switch a:hover {
    text-decoration: underline;
}