/* ===================================================================
   SEO Content Section — Dark Green (style.css の :root 変数を利用)
   =================================================================== */
.seo-content {
    margin-top: 56px;
    padding-top: 8px;
    line-height: 1.85;
    color: var(--text-secondary);
}

.seo-block { margin-bottom: 48px; }

.seo-eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--primary);
    background: var(--accent-glow-lg);
    border: 1px solid var(--border-color);
    padding: 5px 13px;
    border-radius: 999px;
    margin-bottom: 14px;
}
.seo-eyebrow::before {
    content: "";
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--primary); box-shadow: 0 0 8px var(--primary);
}

.seo-content h2 {
    font-size: clamp(1.3rem, 4vw, 1.6rem);
    font-weight: 700;
    letter-spacing: -0.01em;
    line-height: 1.4;
    margin: 0 0 14px;
    color: var(--text-primary);
}
.seo-content h3 {
    font-size: 1.02rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0 0 6px;
}
.seo-content p { margin: 0 0 16px; font-size: 0.95rem; }
.seo-content strong { color: var(--primary-light); font-weight: 600; }
.seo-content a { color: var(--primary); text-decoration: none; }
.seo-content a:hover { text-decoration: underline; }

/* How-to ステップ */
.seo-steps { display: flex; flex-direction: column; gap: 14px; }
.seo-step {
    display: flex; gap: 16px; align-items: flex-start;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
}
.seo-step-num {
    flex-shrink: 0;
    width: 34px; height: 34px;
    display: flex; align-items: center; justify-content: center;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #04130c; font-weight: 700; border-radius: 50%;
    box-shadow: 0 0 14px var(--accent-glow);
}
.seo-step-body { flex: 1; }
.seo-step-body p { margin: 0; font-size: 0.9rem; }

/* プラットフォーム / 用途グリッド */
.seo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
}
.seo-card {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    transition: border-color .2s ease, box-shadow .25s ease, transform .25s ease;
}
.seo-card:hover {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-glow);
    transform: translateY(-2px);
}
.seo-card h3 { display: flex; align-items: center; gap: 8px; }
.seo-card p { font-size: 0.85rem; margin: 8px 0 0; color: var(--text-secondary); }
.seo-tag {
    display: inline-block; font-size: 0.66rem; font-weight: 700;
    color: var(--primary); background: var(--accent-glow-lg);
    border: 1px solid var(--border-color); border-radius: 999px;
    padding: 2px 8px; letter-spacing: 0.04em;
}

/* スペック表 */
.seo-table-wrap { overflow-x: auto; border-radius: var(--radius-lg); border: 1px solid var(--border-color); }
.seo-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; background: var(--bg-primary); }
.seo-table th, .seo-table td { padding: 12px 16px; text-align: left; border-bottom: 1px solid var(--border-color); }
.seo-table thead th { background: var(--bg-tertiary); color: var(--text-primary); font-weight: 600; font-size: 0.82rem; }
.seo-table tbody tr:last-child td { border-bottom: none; }
.seo-table td:first-child { color: var(--text-primary); font-weight: 500; white-space: nowrap; }

/* FAQ アコーディオン（details/summary） */
.seo-faq { display: flex; flex-direction: column; gap: 10px; }
.seo-faq details {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
}
.seo-faq summary {
    list-style: none; cursor: pointer;
    padding: 16px 48px 16px 18px; position: relative;
    font-weight: 600; font-size: 0.93rem; color: var(--text-primary);
}
.seo-faq summary::-webkit-details-marker { display: none; }
.seo-faq summary::before { content: "Q"; color: var(--primary); font-weight: 700; margin-right: 10px; }
.seo-faq summary::after {
    content: ""; position: absolute; right: 20px; top: 50%;
    width: 9px; height: 9px; margin-top: -6px;
    border-right: 2px solid var(--primary); border-bottom: 2px solid var(--primary);
    transform: rotate(45deg); transition: transform .2s ease;
}
.seo-faq details[open] summary::after { transform: rotate(-135deg); }
.seo-faq .seo-faq-a { padding: 0 18px 18px; font-size: 0.9rem; color: var(--text-secondary); }
.seo-faq .seo-faq-a p { margin: 0; }

/* 末尾CTA */
.seo-cta {
    text-align: center;
    background: linear-gradient(135deg, var(--bg-tertiary), var(--bg-primary));
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: 36px 24px;
}
.seo-cta h2 { margin-bottom: 8px; }
.seo-cta p { margin-bottom: 22px; }
.seo-cta .btn-seo-cta {
    display: inline-flex; align-items: center; gap: 8px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #04130c; font-weight: 700; font-size: 1rem;
    padding: 14px 32px; border-radius: var(--radius-lg);
    text-decoration: none; box-shadow: 0 4px 16px var(--accent-glow);
    transition: transform .2s ease, box-shadow .2s ease;
}
.seo-cta .btn-seo-cta:hover { transform: translateY(-2px); box-shadow: 0 8px 28px var(--accent-glow); text-decoration: none; }

@media (max-width: 480px) {
    .seo-grid { grid-template-columns: 1fr; }
    .seo-step { padding: 14px 16px; }
}