/* ========================================
   サステナビリティページ専用スタイル
   ======================================== */

/* ページヒーロー（サステナビリティ用） */
.page-hero {
    margin-top: 85px;
    background: linear-gradient(135deg, #1e3a5f 0%, #0a2540 100%);
    padding: 2rem 0; /* 5rem → 2rem に大幅に縮小し、より細い帯にする */
    text-align: center;
    color: var(--color-white);
    position: relative;
    overflow: hidden;
}


/* ========================================
   サステナビリティビジョン
   ======================================== */

.sustainability-vision {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-white);
}

.vision-content {
    max-width: 1000px;
    margin: 3rem auto 0;
}

.commitment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2.5rem;
    margin-top: 3rem;
}

.commitment-item {
    text-align: center;
    padding: 3rem 2rem;
    background-color: var(--color-off-white);
    border: 1px solid var(--color-border);
    transition: var(--transition-normal);
}

.commitment-item:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: #2e5a9f;
    transform: translateY(-5px);
}

.commitment-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.commitment-title {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 1rem;
}

.commitment-description {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-dark);
}

/* ========================================
   社会課題セクション
   ======================================== */

.social-issues {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-light-gray);
}

.issue-section {
    margin-bottom: 5rem;
}

.issue-header {
    text-align: center;
    margin-bottom: 3rem;
}

.issue-title {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 1rem;
}

.issue-subtitle {
    font-size: 1.05rem;
    color: var(--color-text-gray);
}

/* 統計カード */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-bottom: 4rem;
}

.stat-card {
    background-color: var(--color-white);
    padding: 3rem 2.5rem;
    text-align: center;
    border: 2px solid var(--color-border);
    transition: var(--transition-normal);
}

.stat-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
    transform: translateY(-5px);
}

.stat-card.highlight {
    border-color: var(--color-primary);
    background: linear-gradient(135deg, rgba(46, 90, 159, 0.05) 0%, rgba(46, 90, 159, 0.02) 100%);
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 900;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
    line-height: 1;
}

.stat-unit {
    font-size: 2rem;
    margin-left: 0.3rem;
}

.stat-label {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 1rem;
}

.stat-description {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text-gray);
}

/* 課題の説明 */
.issue-explanation {
    background-color: var(--color-white);
    padding: 3rem;
    border: 1px solid var(--color-border);
}

.explanation-title {
    font-family: var(--font-serif);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 2.5rem;
    text-align: center;
}

.explanation-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
}

.explanation-item {
    display: flex;
    gap: 1.5rem;
}

.explanation-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.explanation-item h5 {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.explanation-item p {
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--color-text-dark);
}

/* ========================================
   解決策セクション
   ======================================== */

.solution-section {
    margin-top: 5rem;
    background-color: var(--color-white);
    padding: 4rem 3rem;
    border: 2px solid #2e5a9f;
}

.solution-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: #2e5a9f;
    text-align: center;
    margin-bottom: 3rem;
}

.solution-flow {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
}

.flow-item {
    flex: 1;
    min-width: 200px;
    text-align: center;
    padding: 2rem 1.5rem;
}

.flow-number {
    display: inline-block;
    width: 60px;
    height: 60px;
    background-color: #2e5a9f;
    color: var(--color-white);
    border-radius: 50%;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 900;
    line-height: 60px;
    margin-bottom: 1.5rem;
}

.flow-title {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 1rem;
}

.flow-description {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text-dark);
}

.flow-arrow {
    font-size: 2rem;
    color: #2e5a9f;
    font-weight: bold;
    flex-shrink: 0;
}

/* ========================================
   環境への取り組み
   ======================================== */

.environmental-initiatives {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #2e5a9f 0%, #1a3a5a 100%);
    color: var(--color-white);
}

.initiatives-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-top: 3rem;
}

.initiative-card {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 3rem 2.5rem;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.initiative-card:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-5px);
}

.initiative-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
}

.initiative-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.25rem;
}

.initiative-description {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 1.5rem;
    opacity: 0.95;
}

.initiative-details {
    list-style: none;
    padding: 1.5rem;
    background-color: rgba(255, 255, 255, 0.05);
    border-left: 3px solid var(--color-accent);
}

.initiative-details li {
    font-size: 0.85rem;
    padding: 0.5rem 0;
    padding-left: 1.2rem;
    position: relative;
    line-height: 1.6;
}

.initiative-details li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ========================================
   地域社会への貢献
   ======================================== */

.community-contribution {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-white);
}

.contribution-content {
    margin-top: 3rem;
}

.contribution-map {
    max-width: 1000px;
    margin: 0 auto;
}

.map-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-text-dark);
    text-align: center;
    margin-bottom: 2rem;
}

.map-description {
    max-width: 800px;
    margin: 0 auto 3rem;
}

.map-description p {
    font-size: 1rem;
    line-height: 1.9;
    color: var(--color-text-dark);
    text-align: center;
}

.partnership-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-top: 3rem;
}

.partnership-item {
    background-color: var(--color-off-white);
    padding: 2.5rem 2rem;
    border: 1px solid var(--color-border);
    border-left: 4px solid #2e5a9f;
}

.partnership-title {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    font-weight: 700;
    color: #2e5a9f;
    margin-bottom: 1rem;
}

.partnership-item p {
    font-size: 0.9rem;
    line-height: 1.8;
    color: var(--color-text-dark);
}

/* ========================================
   数値目標と実績
   ======================================== */

.targets-achievements {
    padding: var(--spacing-xl) 0;
    background-color: var(--color-light-gray);
}

.targets-intro {
    max-width: 800px;
    margin: 0 auto 3rem;
    text-align: center;
}

.targets-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2.5rem;
    margin-top: 3rem;
}

.target-card {
    background-color: var(--color-white);
    padding: 3rem 2.5rem;
    border: 1px solid var(--color-border);
    text-align: center;
    transition: var(--transition-normal);
}

.target-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    border-color: #2e5a9f;
    transform: translateY(-5px);
}

.target-category {
    display: inline-block;
    background-color: #2e5a9f;
    color: var(--color-white);
    padding: 0.4rem 1.2rem;
    border-radius: 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-bottom: 2rem;
}

.target-value {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.target-value .current,
.target-value .goal {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
}

.target-value .goal {
    color: #2e5a9f;
}

.target-value .unit {
    font-size: 1.8rem;
    margin-left: 0.3rem;
}

.target-arrow {
    font-size: 2rem;
    color: var(--color-text-gray);
}

.target-label {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 1rem;
}

.target-description {
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--color-text-dark);
}

/* ========================================
   SDGsへの貢献
   ======================================== */

.sdgs-contribution {
    padding: var(--spacing-xl) 0;
    background: linear-gradient(135deg, #1e3a5f 0%, #0a2540 100%);
    color: var(--color-white);
}

.sdgs-content {
    max-width: 1200px;
    margin: 0 auto;
}

.sdgs-intro {
    font-size: 1.05rem;
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem;
    line-height: 1.9;
    opacity: 0.95;
}

.sdgs-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.sdgs-item {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 2.5rem 2rem;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition-normal);
}

.sdgs-item:hover {
    background-color: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-5px);
}

.sdgs-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.sdgs-number {
    font-family: var(--font-serif);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 0.5rem;
    letter-spacing: 0.1em;
}

.sdgs-title {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.sdgs-description {
    font-size: 0.85rem;
    line-height: 1.7;
    opacity: 0.9;
}

/* ========================================
   レスポンシブデザイン
   ======================================== */

@media (max-width: 1024px) {
    .commitment-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .explanation-grid {
        grid-template-columns: 1fr;
    }
    
    .solution-flow {
        flex-direction: column;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
        margin: 1rem 0;
    }
    
    .initiatives-grid {
        grid-template-columns: 1fr;
    }
    
    .partnership-grid {
        grid-template-columns: 1fr;
    }
    
    .targets-grid {
        grid-template-columns: 1fr;
    }
    
    .sdgs-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .issue-title {
        font-size: 1.8rem;
    }
    
    .stat-number {
        font-size: 3rem;
    }
    
    .stat-unit {
        font-size: 1.5rem;
    }
    
    .explanation-item {
        flex-direction: column;
        text-align: center;
    }
    
    .solution-section {
        padding: 3rem 2rem;
    }
    
    .target-value .current,
    .target-value .goal {
        font-size: 2.5rem;
    }
    
    .sdgs-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .commitment-item {
        padding: 2rem 1.5rem;
    }
    
    .commitment-icon {
        font-size: 3rem;
    }
    
    .issue-explanation {
        padding: 2rem 1.5rem;
    }
    
    .flow-item {
        padding: 1.5rem 1rem;
    }
    
    .initiative-card {
        padding: 2rem 1.5rem;
    }
    
    .partnership-item {
        padding: 2rem 1.5rem;
    }
    
    .target-card {
        padding: 2rem 1.5rem;
    }
    
    .sdgs-item {
        padding: 2rem 1.5rem;
    }
}