:root{--bg-dark: #0a0f1d;--bg-secondary: #111827;--bg-card: rgba(17, 24, 39, .75);--bg-card-hover: rgba(31, 41, 55, .85);--border-color: rgba(255, 255, 255, .1);--border-highlight: rgba(99, 102, 241, .4);--text-main: #f3f4f6;--text-muted: #9ca3af;--text-heading: #ffffff;--accent-blue: #38bdf8;--accent-indigo: #6366f1;--accent-emerald: #34d399;--accent-amber: #fbbf24;--accent-purple: #a855f7;--gradient-primary: linear-gradient(135deg, #6366f1 0%, #38bdf8 100%);--gradient-text: linear-gradient(135deg, #818cf8 0%, #38bdf8 50%, #34d399 100%);--gradient-glass: linear-gradient(135deg, rgba(255, 255, 255, .05) 0%, rgba(255, 255, 255, .01) 100%);--font-family: "Inter", "Noto Sans JP", -apple-system, sans-serif;--shadow-lg: 0 20px 40px -15px rgba(0, 0, 0, .6);--shadow-glow: 0 0 30px rgba(99, 102, 241, .25);--radius-xl: 24px;--radius-lg: 16px;--radius-md: 10px;--transition: all .25s cubic-bezier(.4, 0, .2, 1)}body.light-theme{--bg-dark: #f8fafc;--bg-secondary: #ffffff;--bg-card: rgba(255, 255, 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1.5rem}.navbar{position:sticky;top:0;z-index:100;backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);background:#0a0f1dd9;border-bottom:1px solid var(--border-color);transition:var(--transition)}body.light-theme .navbar{background:#f8fafcd9}.nav-container{display:flex;align-items:center;justify-content:space-between;height:72px;max-width:1200px;margin:0 auto;padding:0 1.5rem}.brand-logo{display:flex;align-items:center;gap:.6rem;text-decoration:none;font-family:Plus Jakarta Sans,sans-serif;font-weight:800;font-size:1.35rem;color:var(--text-heading)}.logo-icon{width:40px;height:40px;border-radius:12px;background:var(--gradient-primary);display:flex;align-items:center;justify-content:center;font-size:1.3rem;box-shadow:0 4px 12px #6366f166}.logo-text .highlight{color:var(--accent-blue)}.nav-links{display:flex;align-items:center;gap:1.5rem}.nav-link{color:var(--text-muted);text-decoration:none;font-weight:500;font-size:.95rem;transition:var(--transition);padding:.4rem 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1.5rem;transition:var(--transition)}.faq-item[open]{border-color:var(--border-highlight);background:#ffffff0a}.faq-question{font-size:1.05rem;font-weight:700;color:var(--text-heading);cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center}.faq-question::-webkit-details-marker{display:none}.faq-answer{margin-top:.8rem;padding-top:.8rem;border-top:1px solid var(--border-color);font-size:.95rem;color:var(--text-muted);line-height:1.6}