.usaservice-content{color:#fff;font-family:Microsoft YaHei UI-Regular,Microsoft YaHei UI;font-size:18px;font-weight:400;height:143px;left:50%;position:absolute;top:53%;-webkit-transform:translateX(-50%);transform:translateX(-50%);width:976px}.usaservice-content p{line-height:40px;text-align:center}.channel{background:url(../../images/f80fb269df1c231d2be8.png) no-repeat;background-position:bottom;background-size:100%;height:1264px;width:100%}.channeldiv{-webkit-box-sizing:border-box;box-sizing:border-box;height:100%;margin:0 auto;padding-top:64px;width:1200px}.channeltitle{color:#282f48;font-family:Microsoft YaHei-Bold,Microsoft YaHei;font-size:24px;font-weight:700;text-align:center}.channel-bg{border-radius:40px;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-wrap:wrap;-ms-flex-wrap:wrap;flex-wrap:wrap;height:800px;margin-top:40px;overflow:hidden;width:100%}.channel-bg-top{height:400px;overflow:hidden;position:relative;width:400px}.channel-bg-top img{height:100%;left:0;position:absolute;top:0;-webkit-transition:all .5s;transition:all .5s;width:100%;z-index:-1}.channel-bg-bottom{-webkit-box-orient:vertical;-webkit-box-direction:normal;-webkit-box-pack:center;-ms-flex-pack:center;-webkit-box-align:center;-ms-flex-align:center;-webkit-align-items:center;align-items:center;display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-flex-direction:column;-ms-flex-direction:column;flex-direction:column;height:400px;-webkit-justify-content:center;justify-content:center;overflow:hidden;position:relative;width:600px}.channel-bg-bottom img{-webkit-transition:all .5s;transition:all .5s;z-index:-1}.channel-bg-bottom img,.channel-bg-item_mask{height:100%;left:0;position:absolute;top:0;width:100%}.channel-bg-item_mask{background:#282f48;opacity:.5;z-index:1}.channel-bg_title{color:#fff;font-family:Microsoft YaHei-Bold,Microsoft YaHei;font-size:18px;font-weight:700;height:24px;width:72px;z-index:2}.channel-bg_content{color:#fff;font-family:Microsoft YaHei-Regular,Microsoft YaHei;font-size:18px;font-weight:400;height:72px;line-height:25px;margin-top:16px;text-align:center;width:368px;z-index:2}.channel-content{color:#282f48;font-family:Microsoft YaHei UI-Regular,Microsoft YaHei UI;font-size:18px;font-weight:400;height:143px;line-height:40px;margin-top:90px;text-align:center;width:100%}.channel-bg-bottom:hover img,.channel-bg-top:hover img{-webkit-transform:scale(1.3);transform:scale(1.3)}