/* ==========================================================================
   自社広告 (House Ad) スタイル
   ========================================================================== */
.house-ad-container {
    margin-bottom: 20px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: transform 0.2s ease;
    background: linear-gradient(135deg, #1a73e8, #22a3b9); /* サイトカラーのグラデーション */
}
.house-ad-container:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 16px rgba(0,0,0,0.15);
}

.house-ad-link {
    display: block;
    text-decoration: none;
    color: white;
    padding: 20px;
    text-align: center;
}

.house-ad-content h3 {
    margin: 10px 0;
    font-size: 18px;
    color: white;
    font-weight: bold;
}

.house-ad-content p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
    color: rgba(255, 255, 255, 0.9);
}

.ad-badge {
    background-color: #ff9900;
    color: white;
    font-size: 10px;
    font-weight: bold;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
}

.ad-button {
    display: inline-block;
    background-color: white;
    color: #1a73e8;
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: bold;
}

/* ダークモード対応 */
.dark-mode .house-ad-container {
    background: linear-gradient(135deg, #2C3E50, #4ca2cd);
}