/* ========================================
   下層ページ共通スタイル
======================================== */

/* ページヘッダー */
.page-header {
    position: relative;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    margin-top: 80px;
}

.page-header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.page-header-bg img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.page-header-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, rgba(0,0,0,0.6) 0%, rgba(0,0,0,0.8) 100%);
}

.page-title {
    text-align: center;
    color: var(--color-white);
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

.page-title .en {
    display: block;
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 0.2em;
    margin-bottom: 10px;
}

.page-title .ja {
    display: block;
    font-size: 42px;
    font-weight: 700;
}

.page-description {
    text-align: center;
    color: var(--color-white);
    font-size: 18px;
    font-weight: 500;
    margin-top: 20px;
    line-height: 1.6;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.7);
}

/* ページコンテンツ */
.page-content {
    padding: 80px 0;
}

.page-content section {
    margin-bottom: 80px;
}

.page-content section:last-child {
    margin-bottom: 0;
}

/* 現在のページ表示 */
.nav-list a.current {
    color: var(--color-primary);
    font-weight: 700;
}

.nav-list a.current::after {
    width: 100%;
}

/* ========================================
   コンセプトページ
======================================== */

/* イントロ */
.concept-intro {
    text-align: center;
}

.lead-text h2 {
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 30px;
}

.lead-text p {
    font-size: 18px;
    line-height: 2;
    color: var(--color-gray);
}

/* 価値提案 */
.values {
    background-color: var(--color-white);
    padding: 80px 0;
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
    margin-top: 60px;
}

.value-item {
    text-align: center;
}

.value-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 30px;
    background-color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.value-icon img {
    width: 50px;
    height: 50px;
    filter: brightness(0) invert(1);
}

.value-item h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 20px;
}

.value-item p {
    font-size: 15px;
    line-height: 1.8;
    color: var(--color-gray);
}

/* ビジョン */
.vision {
    background-color: var(--color-base);
    padding: 80px 0;
}

.vision-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.vision-text h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 30px;
}

.vision-text p {
    font-size: 16px;
    line-height: 2;
    color: var(--color-gray);
    margin-bottom: 20px;
}

.vision-image img {
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

/* アプローチ */
.approach {
    padding: 80px 0;
}

.approach-flow {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 60px;
}

.approach-item {
    flex: 1;
    text-align: center;
    padding: 30px;
    background-color: var(--color-white);
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
}

.approach-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    opacity: 0.3;
    margin-bottom: 20px;
}

.approach-item h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-black);
    margin-bottom: 15px;
}

.approach-item p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-gray);
}

.approach-arrow {
    font-size: 24px;
    color: var(--color-primary);
    margin: 0 20px;
}

/* ページCTA */
.page-cta {
    padding: 80px 0;
    background-color: var(--color-white);
}

.cta-box {
    text-align: center;
    padding: 60px;
    background-color: var(--color-base);
    border-radius: 10px;
}

.cta-box h2 {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.cta-box p {
    font-size: 18px;
    color: var(--color-gray);
    margin-bottom: 30px;
}

.cta-actions {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

/* ========================================
   レスポンシブデザイン
======================================== */
@media (max-width: 768px) {
    .page-header {
        height: 300px;
    }
    
    .page-title .ja {
        font-size: 32px;
    }
    
    .lead-text h2 {
        font-size: 28px;
    }
    
    .lead-text p {
        font-size: 16px;
    }
    
    .values-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .vision-content {
        grid-template-columns: 1fr;
    }
    
    .approach-flow {
        flex-direction: column;
        gap: 20px;
    }
    
    .approach-arrow {
        transform: rotate(90deg);
        margin: 10px 0;
    }
    
    .cta-box {
        padding: 40px 20px;
    }
    
    .cta-box h2 {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .page-header {
        height: 250px;
    }
    
    .page-title .ja {
        font-size: 24px;
    }
}