:root{--primary-color: #3498db;--primary-dark: #2980b9;--secondary-color: #2c3e50;--accent-color: #e74c3c;--light-color: #ecf0f1;--dark-color: #2c3e50;--gray-color: #95a5a6;--light-gray: #f5f7fa;--shadow: 0 4px 6px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 25px rgba(0, 0, 0, .15);--transition: all .3s ease;--border-radius: 8px;--container-width: 1200px;--header-height: 70px}*{margin:0;padding:0;box-sizing:border-box}@keyframes fadeIn{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes slideInLeft{0%{opacity:0;transform:translate(-30px)}to{opacity:1;transform:translate(0)}}@keyframes slideInRight{0%{opacity:0;transform:translate(30px)}to{opacity:1;transform:translate(0)}}.fade-in{animation:fadeIn 1s ease forwards}.slide-in-left{animation:slideInLeft .8s ease forwards}.slide-in-right{animation:slideInRight .8s ease forwards}.delay-1{animation-delay:.2s}.delay-2{animation-delay:.4s}.delay-3{animation-delay:.6s}body{font-family:Segoe UI,Tahoma,Geneva,Verdana,sans-serif;line-height:1.6;color:var(--dark-color);background-color:#fff;overflow-x:hidden}html{scroll-behavior:smooth}.container{width:100%;max-width:var(--container-width);margin:0 auto;padding:0 20px}.section{padding:100px 0;min-height:100vh;display:flex;align-items:center}.section-title{font-size:2.5rem;margin-bottom:2rem;color:var(--secondary-color);position:relative;display:inline-block}.section-title:after{content:"";position:absolute;bottom:-10px;left:0;width:60px;height:4px;background-color:var(--primary-color)}.btn{display:inline-block;padding:12px 30px;background-color:var(--primary-color);color:#fff;border:none;border-radius:var(--border-radius);font-weight:600;cursor:pointer;transition:var(--transition);text-decoration:none;text-align:center}.btn:hover{background-color:var(--primary-dark);transform:translateY(-3px);box-shadow:var(--shadow)}.text-center{text-align:center}.mb-1{margin-bottom:1rem}.mb-2{margin-bottom:2rem}.mb-3{margin-bottom:3rem}.mt-1{margin-top:1rem}.mt-2{margin-top:2rem}.mt-3{margin-top:3rem}