/* レスポンシブ */
@media (max-width: 768px) {
    .header-inner {
        flex-direction: column;
        gap: 8px;
        padding: 5px 10px;
    }

    .logo-image {
        height: 20px;
    }

    .logo-text {
        font-size: 18px;
    }

    nav ul {
        gap: 15px;
        font-size: 14px;
    }

    .hero h1 {
        font-size: 28px;
    }

    .hero p {
        font-size: 16px;
    }

    main {
        padding: 20px;
    }

    h2 {
        font-size: 24px;
    }

    h3 {
        font-size: 20px;
    }

    .layout-half,
    .layout-two-column,
    .footer-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    /* 目次を折りたたみ式に */
    .toc-toggle {
        display: block;
    }

    .toc-content {
        display: none;
    }

    .toc-content.active {
        display: block;
    }

    table {
        font-size: 14px;
    }

    th, td {
        padding: 10px;
    }

    /* 二列テーブルのモバイル表示 */
    .table-two-column table,
    .table-two-column tbody,
    .table-two-column tr {
        display: block;
    }

    .table-two-column table th,
    .table-two-column table td {
        display: block;
        width: 100%;
        text-align: left;
        border: 1px solid #ddd;
    }

    .table-two-column table th {
        background: #17a2b8;
        color: #fff;
    }

    /* only-mobile/only-pc の切り替え */
    .only-mobile {
        display: block;
    }

    .only-pc {
        display: none;
    }

    /* ブログ一覧 */
    .blog-list {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .blog-item-image {
        height: 150px;
    }

    /* ボタン */
    .button-group {
        flex-direction: column;
    }

    .btn-primary,
    .btn-outline {
        width: 100%;
        text-align: center;
    }

    /* iframe */
    .iframe-map iframe {
        height: 300px;
    }

    /* PDF */
    .pdf-embed {
        height: 400px;
    }
}