* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', 'Yu Gothic UI', sans-serif; line-height: 1.7; color: #1a1a2e; background: #f8f9fa; }
.manual-header { background: #1e40af; color: #fff; padding: 16px 24px; }
.manual-header a { color: #bfdbfe; text-decoration: none; font-size: 0.85rem; }
.manual-header h1 { font-size: 1.4rem; margin-top: 4px; }
.manual-container { display: flex; max-width: 1000px; margin: 0 auto; padding: 24px; gap: 24px; }
.manual-nav { width: 220px; flex-shrink: 0; }
.manual-nav h2 { font-size: 0.9rem; color: #64748b; margin-bottom: 8px; }
.manual-nav ul { list-style: none; }
.manual-nav li { margin-bottom: 4px; }
.manual-nav a { color: #1e40af; text-decoration: none; font-size: 0.9rem; display: block; padding: 4px 8px; border-radius: 4px; }
.manual-nav a:hover { background: #eff6ff; }
.manual-content { flex: 1; background: #fff; border-radius: 8px; padding: 24px; border: 1px solid #e2e8f0; }
.manual-content h2 { font-size: 1.2rem; color: #1e3a5f; margin-bottom: 12px; }
.manual-content p { margin-bottom: 12px; font-size: 0.92rem; }
.manual-content img { max-width: 100%; border: 1px solid #e2e8f0; border-radius: 4px; margin: 12px 0; }
@media (max-width: 700px) { .manual-container { flex-direction: column; } .manual-nav { width: 100%; } }