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1)}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.6;overflow-x:hidden}a{color:var(--primary);transition:var(--transition);text-decoration:none}a:hover{color:var(--primary-dark)}img{max-width:100%}.container{max-width:1200px;margin:0 auto;padding:0 24px}.navbar{z-index:1000;-webkit-backdrop-filter:blur(20px);border-bottom:1px solid var(--border);background:#ffffffd9;position:fixed;top:0;left:0;right:0}.nav-container{justify-content:space-between;align-items:center;max-width:1200px;height:64px;margin:0 auto;padding:0 24px;display:flex}.nav-logo{color:var(--text);align-items:center;gap:10px;font-size:1.2em;font-weight:700;display:flex}.nav-logo .logo-icon{flex-shrink:0}.nav-links{align-items:center;gap:32px;display:flex}.nav-links a{color:var(--text-secondary);transition:var(--transition);font-size:.9em;font-weight:500;position:relative}.nav-links a:after{content:"";background:var(--gradient);width:0;height:2px;transition:var(--transition);border-radius:1px;position:absolute;bottom:-4px;left:0}.nav-links a:hover{color:var(--text)}.nav-links a:hover:after{width:100%}.nav-right{align-items:center;gap:16px;display:flex}.lang-select{appearance:none;border:1px solid var(--border);color:var(--text);cursor:pointer;transition:var(--transition);background:url("data:image/svg+xml,%3Csvg width='10' height='6' viewBox='0 0 10 6' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L5 5L9 1' stroke='%234a5568' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") right 10px center no-repeat;border-radius:8px;padding:6px 36px 6px 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0;position:relative}.section-alt{background:var(--bg-alt)}.section-title{text-align:center;margin-bottom:16px;font-size:clamp(1.8rem,3.5vw,2.5rem);font-weight:700}.section-subtitle{text-align:center;color:var(--text-secondary);max-width:600px;margin:0 auto 60px;font-size:1.05em;line-height:1.6}.features-grid{grid-template-columns:repeat(3,1fr);gap:24px;max-width:1100px;margin:0 auto;display:grid}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius);transition:var(--transition);padding:32px;position:relative;overflow:hidden}.feature-card:before{content:"";background:var(--card-accent,var(--primary));opacity:.6;width:100%;height:3px;transition:var(--transition);position:absolute;top:0;left:0}.feature-card:hover{box-shadow:var(--shadow-lg);border-color:var(--card-accent,var(--primary));transform:translateY(-4px)}.feature-card:hover:before{opacity:1;height:4px}.feature-icon{width:52px;height:52px;color:var(--card-accent,var(--primary));background:#00000008;border-radius:12px;justify-content:center;align-items:center;margin-bottom:20px;display:flex}.feature-card h3{margin-bottom:12px;font-size:1.15em;font-weight:600}.feature-card p{color:var(--text-secondary);font-size:.92em;line-height:1.65}.steps-grid{grid-template-columns:repeat(3,1fr);gap:24px;max-width:1000px;margin:0 auto 48px;display:grid}.step-card{text-align:center;background:var(--bg-card);border:1px solid 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var(--border);border-radius:var(--radius);transition:var(--transition);padding:40px 28px;position:relative}.download-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-3px)}.download-card.highlight{border-color:var(--primary);box-shadow:0 0 0 1px #0076b426, var(--shadow);transform:scale(1.03)}.download-card.highlight:hover{transform:scale(1.03)translateY(-3px)}.download-badge{background:var(--gradient);color:#fff;letter-spacing:1px;border-radius:0 0 8px 8px;padding:5px 18px;font-size:.75em;font-weight:700;position:absolute;top:-1px;left:50%;transform:translate(-50%)}.download-icon{color:#fff;border-radius:14px;justify-content:center;align-items:center;width:56px;height:56px;margin-bottom:20px;display:inline-flex}.desktop-icon{background:var(--primary)}.sdk-icon{background:var(--accent)}.server-icon{background:var(--purple)}.download-card h3{margin-bottom:12px;font-size:1.15em;font-weight:600}.download-card 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