header{color:red;margin-left:50px}body{color:#333;background:#fffdfd;margin:0;font-family:sans-serif}section{max-width:1000px;margin:80px auto;padding:0 20px}h2{font-size:32px}footer{text-align:center;max-width:1000px;margin:40px auto}.item{gap:40px;display:flex}.pic{flex-direction:column;align-items:center;display:flex}.pic_bump{flex-direction:column;align-items:center;margin-left:50px;display:flex}.pic_back{flex-direction:column;align-items:center;margin-left:200px;display:flex}.text{text-align:center}.intro{z-index:1000;background:#fff;justify-content:center;align-items:center;display:flex;position:fixed;inset:0}.intro-enter-active,.intro-leave-active{transition:opacity .8s}.intro-enter-from,.intro-leave-to{opacity:0}