:root{--bg: #0a0a0f;--bg-card: #111119;--bg-card-hover: #1a1a28;--accent: #00d4ff;--accent-dim: rgba(0, 212, 255, .12);--purple: #7c3aed;--text: #e8e8ef;--text-muted: #7a7a8e;--border: #1c1c2c;--green: #22c55e;--font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans JP", sans-serif;--font-mono: "Fira Code", "Cascadia Code", monospace}*{margin:0;padding:0;box-sizing:border-box}html{font-size:16px}body{font-family:var(--font-body);background:var(--bg);color:var(--text);min-height:100vh;overflow-x:hidden;-webkit-font-smoothing:antialiased}#app{min-height:100vh}nav{position:fixed;top:0;left:0;right:0;height:56px;background:#0a0a0fd1;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between;padding:0 2rem;z-index:100}.nav-logo{font-size:1.15rem;font-weight:700;color:var(--accent);text-decoration:none;letter-spacing:-.03em}.nav-links{display:flex;gap:1.5rem}.nav-links a{color:var(--text-muted);text-decoration:none;font-size:.88rem;font-weight:500;transition:color .2s}.nav-links a:hover,.nav-links a.active{color:var(--accent)}.hero{padding:10rem 2rem 3.5rem;text-align:center;max-width:720px;margin:0 auto}.hero h1{font-size:3.5rem;font-weight:800;margin-bottom:1rem;background:linear-gradient(135deg,var(--accent),var(--purple));-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;letter-spacing:-.04em;line-height:1.15}.hero p{font-size:1.1rem;color:var(--text-muted);line-height:1.8;margin-bottom:3rem}.features{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:1.25rem;max-width:720px;margin:0 auto;padding:0 2rem 5rem}.feature-card{background:var(--bg-card);border:1px solid 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