/* 小屏幕手机端 */
               @media (min-width: 0px) and (max-width:750px) {
                   nav {
                       padding: 0 .4rem;
                       box-sizing: border-box;
                   }

                   main {
                       /* background-color: #F6F8FB; */
                       /* width: 100vw; */
                       /* font-size: 0rem; */
                       /* margin: 0 auto; */
                   }

                   .headerbox {
                       /* background: url(../partimage/milk/screentopimg.png); */
                       /* width: 100%; */
                       height: 4.6667rem;
                       margin: 0 auto;
                       background-size: 100% 100%;
                       position: relative;
                   }

                   .topimg {
                       width: 100%;
                       height: 4.6667rem;
                       /* width: 100vw; */
                       position: absolute;
                   }

                   .header {
                       /* width: 16rem; */
                       z-index: 99;
                   }

                   .top-content {
                       position: absolute;
                       top: .7067rem;
                       left: .6667rem;
                   }

                   .top-content h1 {
                       font-family: Alibaba PuHuiTi;
                       font-weight: 500;
                       font-size: .48rem;
                       color: #FFFFFF;
                       /* height: .4667rem;
            line-height: 1.0667rem; */
                   }

                   .top-content div {
                       width: 1.3333rem;
                       height: .0533rem;
                       background: #F5F2F6;
                       margin: .28rem 0 .2667rem;
                   }

                   .top-content p {
                       width: 4.8667rem;
                       font-family: Alibaba PuHuiTi;
                       font-weight: 400;
                       font-size: .2133rem;
                       color: #FFFFFF;
                       /* line-height: 1.8; */
                       height: 1.8133rem;
                       line-height: .4rem;
                   }

                   .milkbox {
                       background: url(../partimage/milk/screenbg.png);
                       /* width: 100%; */
                       height: 14.6533rem;
                       margin: 0 auto;
                       background-size: 100% 100%;
                       padding: .6533rem .4rem;
                       box-sizing: border-box;
                   }

                   .topstar {
                       display: flex;
                       justify-content: center;
                       align-items: center;
                       margin-bottom: .4rem;
                       height: .4rem;
                   }

                   .topstar h1 {
                       font-family: Alibaba PuHuiTi;
                       font-weight: 500;
                       font-size: .4267rem;
                       color: #333333;
                       margin: 0 .1067rem;
                   }

                   .topstar img {
                       width: .1867rem;
                       height: .1867rem;
                   }

                   ul {
                       display: flex;
                       flex-wrap: wrap;
                   }

                   li {
                       width: 4.4667rem;
                       height: 4rem;
                       border: .0133rem solid transparent;
                       border-radius: .1333rem;
                       background-clip: padding-box, border-box;
                       background-origin: padding-box, border-box;
                       background-image: linear-gradient(-90deg, #EEF9FF, #F4F9FD), linear-gradient(0deg, #FFFFFF, #E9F6FD);
                       text-align: center;
                       padding: .3333rem .4267rem .4267rem;
                       box-sizing: border-box;
                       margin-right: .2667rem;
                   }

                   li:nth-child(4) {
                       padding: .3333rem .3067rem .4267rem;
                       box-sizing: border-box;
                   }

                   li:nth-child(-n+4) {
                       margin-bottom: .2667rem;
                   }

                   li:nth-child(2n) {
                       margin-right: 0rem;
                   }

                   li img {
                       width: 1.3067rem;
                       height: 1.4533rem;
                   }

                   li h1 {
                       font-family: Alibaba PuHuiTi;
                       font-weight: 500;
                       font-size: .4rem;
                       color: #333333;
                       margin: .1067rem 0 .16rem;
                   }

                   li p {
                       font-family: Alibaba PuHuiTi;
                       font-weight: 400;
                       font-size: .2933rem;
                       color: #666666;
                   }
               }