.introduction .inner{width:80%;display:flex;align-items: center;justify-content: space-between;flex-wrap:wrap;margin:50px auto 0}
.introduction .inner .left-img{width:49%;}
.introduction .inner .left-img img{width:100%;display: block;}
.introduction .inner .right{width:49%;margin:0;}
@media (min-width:769px){.introduction .welcome p,.introduction .welcome span,.introduction .hellobtn{text-align: left;}}
@media (max-width:768px){.introduction .hello p{font-size:14px;}
.introduction .hello p::before,.introduction .hello p::after{display:none;}
.introduction .inner{width:100%;padding:0 15px;margin-top:30px;}
.introduction .inner .left-img{width:100%;}
.introduction .inner .right{width:100%;margin-top:10px;}}
.case{background: none;padding:0;}
.case .img{margin:20px auto 0;width:80%;text-align: center;}
.case .img img{max-width:100%;}
.case .ourcase p{text-transform: uppercase;}
@media (max-width:768px){.case .img{width:100%;padding:0 15px;}}