.main {
    padding: 40px 0 0 0;
}

.main .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

/* パンくずリスト */
.breadcrumb {
    font-size: 14px;
    color: var(--light-text);
    margin-bottom: 30px;
    padding: 15px 0;
}

.breadcrumb a {
    color: var(--light-text);
    text-decoration: none;
    transition: color 0.3s ease;
}

.breadcrumb a:hover {
    color: var(--primary-color);
    text-decoration: underline;
}

.breadcrumb-separator {
    margin: 0 8px;
    color: var(--light-text);
}

.breadcrumb-current {
    color: var(--text-color);
    font-weight: 500;
}

.news-article {
    background-color: var(--white);
    margin: 20px 0 60px 0;
    padding: 40px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.article-header {
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 30px;
    margin-bottom: 40px;
}

.article-meta {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.article-date {
    font-size: 16px;
    color: var(--text-color);
    font-weight: 600;
}

.article-category {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 15px;
    font-size: 14px;
    font-weight: 600;
}

.article-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-color);
    line-height: 1.4;
    margin-bottom: 30px;
}

.article-thumbnail {
    width: 100%;
    max-width: 800px;
    margin: 0 auto 40px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.article-thumbnail img {
    width: 100%;
    height: auto;
    display: block;
}

.article-content {
    max-width: 800px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
}

.article-content h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text-color);
    margin: 40px 0 20px 0;
    padding-bottom: 12px;
    border-bottom: 3px solid var(--primary-color);
    position: relative;
}

.article-content h2::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 0;
    width: 80px;
    height: 3px;
    background-color: var(--accent-color);
}

.article-content h3 {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-color);
    margin: 35px 0 18px 0;
    padding-left: 16px;
    border-left: 4px solid var(--primary-color);
}

.article-content h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-color);
    margin: 30px 0 15px 0;
}

.article-content p {
    margin-bottom: 20px;
}

.article-content ul,
.article-content ol {
    margin: 20px 0;
    padding-left: 25px;
}

.article-content li {
    margin-bottom: 8px;
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: 8px;
    margin: 20px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.article-content blockquote {
    background-color: var(--light-bg);
    border-left: 4px solid var(--primary-color);
    margin: 25px 0;
    padding: 20px 25px;
    font-style: italic;
    border-radius: 0 8px 8px 0;
}

.content-section {
    margin-bottom: 40px;
}

.content-heading {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--primary-color);
    position: relative;
}

.content-heading::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--accent-color);
}

.content-text {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 20px;
}

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

.back-to-list {
    text-align: center;
    margin: 60px 0;
}

.btn-back-to-list {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--white);
    color: var(--primary-color);
    padding: 12px 30px;
    border: 2px solid var(--primary-color);
    border-radius: 30px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-back-to-list:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-back-to-list i {
    margin-right: 8px;
}

/* 関連記事 */
.related-news {
    background-color: var(--light-bg);
    padding: 60px 0;
    margin: 60px 0;
    border-radius: 12px;
}

.related-news-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 30px;
}

.related-news-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-color);
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.related-news-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--primary-color);
    border-radius: 2px;
}

.related-news-list {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

.related-news-item {
    background-color: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.related-news-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

.related-news-link {
    display: block;
    text-decoration: none;
    color: inherit;
}

.related-news-thumbnail {
    width: 100%;
    height: 200px;
    overflow: hidden;
}

.related-news-thumbnail img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
}

.related-news-item:hover .related-news-thumbnail img {
    transform: scale(1.05);
}

.related-news-content {
    padding: 25px;
}

.related-news-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.related-news-date {
    font-size: 14px;
    color: var(--light-text);
    font-weight: 500;
}

.related-news-category {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.related-news-title-text {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-color);
    line-height: 1.4;
    margin-bottom: 12px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.related-news-excerpt {
    font-size: 14px;
    color: var(--light-text);
    line-height: 1.5;
    margin: 0;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ページネーション（記事内） */
.post-pagination {
    text-align: center;
    margin: 40px 0;
    padding: 20px 0;
    border-top: 1px solid var(--border-color);
    border-bottom: 1px solid var(--border-color);
}

.post-pagination p {
    font-weight: 600;
    color: var(--text-color);
    margin: 0;
}

.post-pagination a {
    display: inline-block;
    margin: 0 5px;
    padding: 8px 15px;
    background-color: var(--primary-color);
    color: var(--white);
    text-decoration: none;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.post-pagination a:hover {
    background-color: var(--accent-color);
}

@media (max-width: 992px) {
    .article-title {
        font-size: 28px;
    }
    
    .content-heading {
        font-size: 22px;
    }
    
    .article-content h2 {
        font-size: 24px;
    }
    
    .article-content h3 {
        font-size: 20px;
    }
    
    .related-news-list {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .main {
        padding-top: 20px;
    }
    
    .main .container {
        padding: 0 20px;
    }
    
    .news-article {
        margin: 10px 0 40px 0;
        padding: 30px 20px;
    }
    
    .breadcrumb {
        margin-bottom: 20px;
        font-size: 13px;
    }
    
    .article-header {
        margin-bottom: 30px;
        padding-bottom: 25px;
    }
    
    .article-meta {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
        margin-bottom: 20px;
    }
    
    .article-date {
        font-size: 14px;
    }
    
    .article-category {
        font-size: 12px;
        padding: 4px 12px;
    }
    
    .article-title {
        font-size: 24px;
        line-height: 1.3;
        margin-bottom: 25px;
    }
    
    .article-thumbnail {
        margin-bottom: 30px;
    }
    
    .article-content {
        font-size: 15px;
        line-height: 1.7;
    }
    
    .article-content h2 {
        font-size: 22px;
        margin: 35px 0 18px 0;
    }
    
    .article-content h3 {
        font-size: 19px;
        margin: 30px 0 15px 0;
    }
    
    .article-content h4 {
        font-size: 18px;
    }
    
    .content-section {
        margin-bottom: 25px;
    }
    
    .content-heading {
        font-size: 20px;
        margin-bottom: 15px;
    }
    
    .content-text {
        line-height: 1.6;
        margin-bottom: 15px;
    }
    
    .share-buttons {
        gap: 10px;
    }
    
    .share-buttons a {
        padding: 10px 16px;
        font-size: 13px;
    }
    
    .back-to-list {
        margin: 40px 0;
    }
    
    .btn-back-to-list {
        font-size: 16px;
        padding: 12px 24px;
    }
    
    .related-news {
        padding: 40px 0;
        margin: 40px 0;
    }
    
    .related-news-container {
        padding: 0 20px;
    }
    
    .related-news-title {
        font-size: 24px;
        margin-bottom: 30px;
    }
    
    .related-news-list {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-bottom: 30px;
    }
    
    .related-news-thumbnail {
        height: 180px;
    }
    
    .related-news-content {
        padding: 20px;
    }
    
    .related-news-title-text {
        font-size: 16px;
    }
}

@media (max-width: 576px) {
    .main .container {
        padding: 0 15px;
    }
    
    .news-article {
        padding: 20px 15px;
    }
    
    .breadcrumb {
        font-size: 12px;
    }
    
    .breadcrumb-separator {
        margin: 0 5px;
    }
    
    .article-title {
        font-size: 20px;
    }
    
    .article-content {
        font-size: 14px;
    }
    
    .article-content h2 {
        font-size: 20px;
    }
    
    .article-content h3 {
        font-size: 18px;
    }
    
    .article-content h4 {
        font-size: 16px;
    }
    
    .content-heading {
        font-size: 18px;
    }
    
    .content-text {
        line-height: 1.5;
    }
    
    .back-to-list {
        margin: 30px 0;
    }
    
    .btn-back-to-list {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .related-news-container {
        padding: 0 15px;
    }
    
    .related-news-title {
        font-size: 20px;
    }
    
    .related-news-thumbnail {
        height: 160px;
    }
    
    .related-news-content {
        padding: 15px;
    }
    
    .related-news-title-text {
        font-size: 15px;
    }
    
    .related-news-excerpt {
        font-size: 13px;
    }
}