:root{--bg:#f4f7fb;--panel:rgba(255,255,255,0.68);--panel-strong:#ffffff;--text:#0f172a;--muted:#475569;--line:rgba(148,163,184,0.34);--brand:#0b8f89;--brand-ink:#066f6a;--focus:#f59e0b;--shadow:0 18px 48px rgba(15,23,42,0.12);--radius:20px}*{box-sizing:border-box}body,html{margin:0;padding:0}body{font-family:Avenir Next,SF Pro Display,Segoe UI,sans-serif;color:var(--text);background:radial-gradient(circle at 8% 0,rgba(14,165,233,.18),transparent 34%),radial-gradient(circle at 92% 4%,rgba(16,185,129,.16),transparent 32%),radial-gradient(circle at 50% 110%,rgba(129,140,248,.15),transparent 38%),var(--bg)}a{color:inherit}.container{width:min(1120px,92vw);margin:0 auto}.topbar{position:-webkit-sticky;position:sticky;top:0;z-index:30;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);background:rgba(244,247,251,.68);border-bottom:1px solid var(--line)}.topbar-inner{min-height:72px;display:flex;justify-content:space-between}.brand-wrap,.topbar-inner{align-items:center;gap:12px}.brand-wrap{display:inline-flex;text-decoration:none}.brand-title{font-weight:800;letter-spacing:-.02em}.brand-subtitle{display:block;font-size:.75rem;color:var(--muted)}.nav{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.nav-link{text-decoration:none;color:var(--muted);font-weight:700;font-size:.92rem}.nav-link.active,.nav-link:hover{color:var(--text)}.lang-btn{border:1px solid var(--line);padding:6px 12px;border-radius:999px;text-decoration:none;font-weight:700;font-size:.86rem;background:var(--panel)}.hero{display:grid;grid-template-columns:1.15fr .85fr;grid-gap:24px;gap:24px;padding:72px 0 32px}.hero-copy h1{margin:0;font-size:clamp(2.2rem,6vw,4rem);line-height:.95;letter-spacing:-.04em}.hero-copy p{margin-top:20px;color:var(--muted);max-width:64ch;font-size:1.08rem}.button-row{margin-top:28px;display:flex;gap:12px;flex-wrap:wrap}.btn{text-decoration:none;border-radius:999px;padding:12px 18px;font-weight:800;border:1px solid var(--line)}.btn-primary{background:linear-gradient(120deg,var(--brand),#0ea5a0);color:#fff;border:none;box-shadow:0 12px 24px rgba(11,143,137,.25)}.btn-store{background:#111827;color:#fff;border-color:#111827}.hero-card{background:linear-gradient(145deg,rgba(255,255,255,.78),rgba(255,255,255,.55));border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:22px}.hero-card h3{margin:0 0 12px}.tag{display:inline-block;padding:3px 8px;border-radius:999px;font-size:.74rem;font-weight:700;border:1px solid rgba(14,165,233,.4);background:rgba(14,165,233,.1)}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));grid-gap:14px;gap:14px;margin:22px 0 56px}.feature-grid{width:min(920px,92vw);margin-left:auto;margin-right:auto;grid-template-columns:repeat(2,minmax(0,1fr))}.feature-grid .card{text-align:center}.card{border-radius:var(--radius);background:var(--panel-strong);border:1px solid var(--line);box-shadow:0 12px 30px rgba(15,23,42,.08);padding:18px}.page{padding:48px 0 72px}.page h1{margin:0;font-size:clamp(1.9rem,4vw,2.9rem);letter-spacing:-.02em}.page li,.page p{color:var(--muted)}.notice{margin-top:18px;border-left:4px solid var(--focus);background:#fff7e7;border-radius:10px;padding:10px 14px}.footer{border-top:1px solid var(--line);padding:20px 0 34px;color:var(--muted);font-size:.94rem}code{font-family:SF Mono,Menlo,monospace;background:#e2e8f0;padding:1px 6px;border-radius:6px}@media (max-width:900px){.hero{padding-top:48px}.grid,.hero{grid-template-columns:1fr}.feature-grid{width:min(1120px,92vw)}}