/* 基本設定 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

/* ヘッダーレイアウト */
.page-header {
    background-color: #fff;
    border-bottom: 1px solid #ddd;
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center; /* ロゴを中央寄せ */
    align-items: center;
    position: relative;
    padding: 0 20px;
}

.logo {
    height: 50px;
    width: auto;
}

/* トップに戻るボタン */
.nav-area {
    position: absolute;
    right: 20px;
}

.btn-back {
    display: inline-block;
    padding: 8px 16px;
    background-color: #234319; /* 既存サイトの緑色系統 */
    color: #fff;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    font-weight: bold;
    transition: opacity 0.3s;
}

.btn-back:hover {
    opacity: 0.8;
}

/* メインコンテンツ */
.content-wrapper {
    max-width: 1000px;
    margin: 0 auto;
    text-align: center;
}

.image-container img {
    width: 100%;
    height: auto;
    display: block; /* 画像下の隙間を解消 */
}

/* お問い合わせセクション */
.contact-section {
    padding: 60px 20px;
    background-color: #fff;
}

.office-name {
    font-size: 18px;
    font-weight: bold;
    margin-bottom: 10px;
}

.mail-address a {
    color: #274383;
    text-decoration: none;
    font-size: 18px;
}

.mail-address a:hover {
    text-decoration: underline;
}

/* フッター */
.page-footer {
    padding: 30px 0;
    background-color: #333;
    color: #fff;
    text-align: center;
}

.copyright {
    font-size: 12px;
}

/* レスポンシブ切り替え */
.pc-only { display: block; }
.sp-only { display: none; }

@media screen and (max-width: 767px) {
    .pc-only { display: none; }
    .sp-only { display: block; }

    .header-inner {
        flex-direction: column;
        gap: 15px;
    }

    .nav-area {
        position: static; /* SP時は中央に配置 */
    }

    .logo {
        height: 40px;
    }

    .contact-section {
        padding: 40px 20px;
    }
}