.article-header { padding: 32px 0 24px; }
    .article-category { display: inline-block; padding: 4px 12px; background: var(--accent-weak); color: var(--accent-strong); border-radius: var(--radius-chip); font-size: 11px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 12px; }
    .article-title { font-family: var(--font-display); font-size: clamp(28px, 4vw, 42px); font-weight: 600; letter-spacing: -0.02em; line-height: 1.15; margin-bottom: 12px; }
    .article-meta { display: flex; align-items: center; gap: 16px; font-size: 14px; color: var(--muted); flex-wrap: wrap; }
    .article-author { display: flex; align-items: center; gap: 8px; }
    .article-avatar { width: 36px; height: 36px; border-radius: 50%; background: var(--accent-weak); display: grid; place-items: center; color: var(--accent-strong); font-weight: 600; font-size: 14px; }
    .article-hero-img { width: 100%; height: clamp(200px, 35vw, 400px); border-radius: var(--radius-card); overflow: hidden; margin-bottom: 32px; }
    .article-hero-img .ph-img { width: 100%; height: 100%; }
    .article-body { font-size: 17px; line-height: 1.8; color: var(--fg); padding-bottom: 48px; }
    .article-body p { margin-bottom: 20px; }
    .article-body h2 { font-family: var(--font-display); font-size: 24px; font-weight: 600; letter-spacing: -0.01em; margin: 40px 0 16px; line-height: 1.3; }
    .article-body h3 { font-family: var(--font-display); font-size: 19px; font-weight: 600; letter-spacing: -0.01em; margin: 28px 0 12px; }
    .article-body ul { margin: 16px 0; padding-left: 24px; list-style: disc; }
    .article-body ul li { margin-bottom: 8px; }
    .article-body strong { color: var(--fg); }
    .article-body .tip { background: var(--accent-weak); border-radius: var(--radius-card); padding: 16px 20px; margin: 24px 0; font-size: 15px; line-height: 1.6; }
    .article-body .tip strong { color: var(--accent-strong); }
    .article-nav { display: flex; justify-content: space-between; gap: 16px; padding: 24px 0 48px; border-top: 1px solid var(--border); }
    .article-nav a, .article-nav span { font-size: 14px; font-weight: 500; color: var(--muted); }
    .article-nav .next { text-align: right; }
    .related-posts { padding: 48px 0; border-top: 1px solid var(--border); }
    .related-posts h2 { font-family: var(--font-display); font-size: 22px; font-weight: 600; letter-spacing: -0.01em; margin-bottom: 24px; text-align: center; }
    .related-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 20px; }
    .related-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; text-decoration: none; color: var(--fg); transition: box-shadow 0.2s; }
    .related-card:hover { box-shadow: var(--shadow-soft); }
    .related-card-img { width: 100%; height: 140px; }
    .related-card-img .ph-img { width: 100%; height: 100%; }
    .related-card-body { padding: 14px; }
    .related-card-title { font-family: var(--font-display); font-size: 15px; font-weight: 600; letter-spacing: -0.01em; line-height: 1.3; }
    .related-card .blog-category { display: inline-block; padding: 3px 10px; background: var(--accent-weak); color: var(--accent-strong); border-radius: var(--radius-chip); font-size: 10px; font-weight: 600; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: 6px; }

    @media (max-width: 480px) {
      .article-header { padding: 20px 0 16px; }
      .article-title { font-size: clamp(22px, 6vw, 28px); }
      .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
      .article-body { font-size: 15px; padding-bottom: 32px; }
      .article-body h2 { font-size: 20px; margin: 28px 0 12px; }
      .article-body h3 { font-size: 17px; }
      .article-nav { flex-direction: column; gap: 12px; padding: 16px 0 32px; }
      .article-nav .next { text-align: left; }
      .related-posts { padding: 32px 0; }
      .related-posts h2 { font-size: 18px; }
      .related-grid { gap: 14px; }
      .related-card-img { height: 110px; }
    }