@media (max-width:768px){.why-choose-content{flex-direction:column;align-items:center}@media (max-width:768px){header{padding:5px 4vw}.logo-header{max-width:12vw;height:auto}.title{margin:0 2vw}.header-left{margin-right:2vw}.header-right{margin-left:2vw}nav ul li a{font-size:4vw;padding:8px 3vw}}}