:root{--primary: #f59e0b;--primary-dark: #d97706;--gradient: linear-gradient(135deg, #f59e0b 0%, #f97316 50%, #ef4444 100%);--text: #1e293b;--text-muted: #64748b;--bg: #fffdf7;--card: #ffffff;--radius: 16px}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,PingFang SC,Microsoft YaHei,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}.container{max-width:960px;margin:0 auto;padding:0 24px}header{display:flex;justify-content:center;align-items:center;padding:20px 24px;position:relative;z-index:10}.logo{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:700;color:var(--primary)}.logo img{border-radius:10px}.hero{text-align:center;padding:60px 24px 40px}.hero-icon{width:100px;height:100px;border-radius:24px;display:block;margin:0 auto 28px;box-shadow:0 16px 40px #f59e0b4d}.hero h1{font-size:clamp(36px,6vw,52px);font-weight:800;letter-spacing:-.5px;background:var(--gradient);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text;margin-bottom:12px}.hero .subtitle{font-size:18px;color:var(--text-muted);max-width:480px;margin:0 auto 32px}.hero .cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 32px;border-radius:100px;font-size:16px;font-weight:600;text-decoration:none;cursor:pointer;transition:all .2s;border:none}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 24px #f59e0b4d}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-1px);box-shadow:0 12px 32px #f59e0b66}.btn-outline{background:var(--card);color:var(--text);border:1.5px solid #e2e8f0}.btn-outline:hover{border-color:var(--primary);color:var(--primary)}.features{padding:60px 0}.features h2{text-align:center;font-size:28px;font-weight:700;margin-bottom:40px}.features .grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px}.features .card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:0 1px 3px #0000000f;transition:transform .2s,box-shadow .2s}.features .card:hover{transform:translateY(-2px);box-shadow:0 8px 24px #00000014}.features .card .icon-box{width:48px;height:48px;border-radius:12px;display:flex;align-items:center;justify-content:center;margin-bottom:16px;font-size:24px}.features .card h3{font-size:17px;font-weight:700;margin-bottom:6px}.features .card p{font-size:14px;color:var(--text-muted)}.invite{padding:40px 0;text-align:center}.invite-label{font-size:14px;color:var(--text-muted);margin-bottom:12px}.invite-code{display:inline-flex;align-items:center;gap:12px;background:var(--card);border:1.5px dashed #fcd34d;border-radius:var(--radius);padding:12px 20px}.invite-code span{font-size:24px;font-weight:700;letter-spacing:2px;color:var(--primary);font-family:SF Mono,Fira Code,Consolas,monospace}.btn-copy{display:inline-flex;align-items:center;gap:4px;padding:8px 16px;border-radius:8px;font-size:14px;font-weight:600;cursor:pointer;border:1px solid #fcd34d;background:#fffbeb;color:var(--primary);transition:all .2s}.btn-copy:hover{background:#fef3c7}.btn-copy.copied{background:#dcfce7;border-color:#86efac;color:#16a34a}.download{padding:40px 0 80px;text-align:center}.download h2{font-size:28px;font-weight:700;margin-bottom:12px}.download>p{color:var(--text-muted);margin-bottom:32px}.download-cards{display:flex;gap:20px;justify-content:center;flex-wrap:wrap}.dl-card{background:var(--card);border-radius:var(--radius);padding:36px 32px 28px;width:260px;text-align:center;box-shadow:0 1px 3px #0000000f;transition:transform .2s,box-shadow .2s,outline .2s}.dl-card:hover{transform:translateY(-2px);box-shadow:0 8px 24px #00000014}.dl-card.highlight{outline:2px solid var(--primary);outline-offset:4px}.dl-card .platform-icon{width:56px;height:56px;margin:0 auto 16px}.dl-card h3{font-size:18px;margin-bottom:4px}.dl-card .version{font-size:13px;color:var(--text-muted);margin-bottom:18px}.dl-card .btn{width:100%;justify-content:center}.dl-card.soon{opacity:.6;pointer-events:none}.dl-card.soon .btn{background:#f1f5f9;color:var(--text-muted);box-shadow:none}footer{text-align:center;padding:24px;color:var(--text-muted);font-size:13px;border-top:1px solid #f1f5f9}footer a{color:var(--primary);text-decoration:none}@media(max-width:640px){.hero{padding:40px 16px 24px}.download-cards{flex-direction:column;align-items:center}}