main{max-width:720px;margin:20px auto;padding:20px;font-family:Arial,sans-serif;box-sizing:border-box}.skills-section{background-color:#f9f9f9;border:1px solid #ddd;border-radius:8px;padding:20px;box-shadow:0 2px 5px rgba(0,0,0,.1)}h2{font-size:26px;color:#333;margin-bottom:20px;display:flex;align-items:center;justify-content:center;border-bottom:2px solid #009688;padding-bottom:10px}.section-icon{font-size:30px;color:#009688;margin-right:10px}.content{margin-top:20px}.promotion-item{display:flex;align-items:flex-start;margin-bottom:20px;padding:15px;border:1px solid #ddd;border-radius:6px;background-color:#fff;box-shadow:0 2px 5px rgba(0,0,0,.05);transition:box-shadow .3s ease}.promotion-item:hover{box-shadow:0 4px 10px rgba(0,0,0,.15)}.promotion-icon{font-size:28px;color:#009688;margin-right:15px}.promotion-item p{margin:0;font-size:18px;color:#555;line-height:1.8}@media (max-width:720px){main{padding:15px}.skills-section{padding:15px}h2{font-size:22px}.promotion-item p{font-size:16px}.promotion-icon{font-size:24px}}