h1{font-size:36px;font-weight:700;color:#333333;line-height:1.3;margin-bottom:20px}h2{font-size:32px;font-weight:600;color:#444444;line-height:1.2;margin-bottom:18px}h3{font-size:28px;font-weight:500;color:#555555;line-height:1.2;margin-bottom:16px}h4{font-size:24px;font-weight:400;color:#666666;line-height:1.2;margin-bottom:14px}