:root{--primary-color: #1890ff;--secondary-color: #f0f2f5;--text-color: #333;--text-light: #666;--bg-color: #fff;--border-color: #e8e8e8;--success-color: #52c41a;--warning-color: #faad14;--error-color: #f5222d;--font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif}*{margin:0;padding:0;box-sizing:border-box}body{font-family:var(--font-family);color:var(--text-color);background-color:var(--secondary-color);line-height:1.6}.container{max-width:1200px;margin:0 auto;padding:0 20px}header{background-color:var(--bg-color);box-shadow:0 2px 8px #0000001a;position:sticky;top:0;z-index:1000}nav{display:flex;justify-content:space-between;align-items:center;padding:20px 0}.logo{font-size:24px;font-weight:700;color:var(--primary-color);text-decoration:none}.nav-links{display:flex;list-style:none;gap:30px}.nav-links a{text-decoration:none;color:var(--text-color);font-weight:500;transition:color .3s}.nav-links a:hover{color:var(--primary-color)}.hero{background:linear-gradient(135deg,#667eea,#764ba2);color:#fff;padding:100px 0;text-align:center}.hero h1{font-size:48px;margin-bottom:20px;font-weight:700}.hero p{font-size:20px;margin-bottom:40px;opacity:.9}.btn{display:inline-block;padding:12px 30px;background-color:var(--primary-color);color:#fff;border:none;border-radius:4px;font-size:16px;font-weight:500;text-decoration:none;cursor:pointer;transition:all .3s}.btn:hover{background-color:#40a9ff;transform:translateY(-2px);box-shadow:0 4px 12px #1890ff4d}.btn-secondary{background-color:transparent;border:2px solid white;margin-left:20px}.btn-secondary:hover{background-color:#fff;color:var(--primary-color)}.section{padding:100px 0;background-color:var(--bg-color)}.section:nth-child(2n){background-color:var(--secondary-color)}.section-title{text-align:center;font-size:36px;font-weight:700;margin-bottom:20px;color:var(--text-color)}.section-subtitle{text-align:center;font-size:18px;color:var(--text-light);margin-bottom:60px}.about-content{display:flex;align-items:center;gap:60px}.about-text{flex:1}.about-text h3{font-size:24px;margin-bottom:20px;color:var(--primary-color)}.about-text p{margin-bottom:20px;line-height:1.8}.about-image{flex:1}.about-image img{width:100%;border-radius:8px;box-shadow:0 4px 12px #0000001a}.product-features{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:40px;margin-top:60px}.feature-card{background-color:var(--bg-color);padding:40px;border-radius:8px;box-shadow:0 4px 12px #0000001a;text-align:center;transition:transform .3s}.feature-card:hover{transform:translateY(-10px);box-shadow:0 8px 24px #00000026}.feature-icon{font-size:48px;color:var(--primary-color);margin-bottom:20px}.feature-card h3{font-size:20px;margin-bottom:15px;color:var(--text-color)}.feature-card p{color:var(--text-light);line-height:1.6}.contact-form{max-width:600px;margin:0 auto;background-color:var(--bg-color);padding:40px;border-radius:8px;box-shadow:0 4px 12px #0000001a}.form-group{margin-bottom:20px}.form-group label{display:block;margin-bottom:8px;font-weight:500;color:var(--text-color)}.form-group input,.form-group textarea{width:100%;padding:12px;border:1px solid var(--border-color);border-radius:4px;font-size:16px;transition:border-color .3s}.form-group input:focus,.form-group textarea:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 2px #1890ff33}.form-group textarea{resize:vertical;min-height:120px}footer{background-color:#1a1a1a;color:#fff;padding:60px 0 20px}.footer-content{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:40px;margin-bottom:40px}.footer-section h3{font-size:18px;margin-bottom:20px;color:var(--primary-color)}.footer-section p,.footer-section li{margin-bottom:10px;opacity:.8}.footer-section ul{list-style:none}.footer-section a{color:#fff;text-decoration:none;transition:opacity .3s}.footer-section a:hover{opacity:1}.footer-bottom{text-align:center;padding-top:20px;border-top:1px solid rgba(255,255,255,.1);opacity:.6}@media (max-width: 768px){.nav-links{display:none}.hero h1{font-size:36px}.hero p{font-size:18px}.about-content{flex-direction:column;text-align:center}.contact-form{padding:20px}}@media (max-width: 480px){.hero h1{font-size:28px}.hero p{font-size:16px}.btn{display:block;margin:10px auto;text-align:center}.btn-secondary{margin-left:0}}