#back_top{height:162.5px;position:fixed;right:0;top:50%;transform:translateY(-50%);box-shadow:0 8px 16px 0 rgba(0,0,0,.1);flex-direction:column;border-radius:.5em 0 0 .5em;z-index:9999}#back_top,#back_top .item{width:65px;display:flex;justify-content:center;align-items:center;background:#fff}#back_top .item{height:65px;overflow:hidden;cursor:pointer}#back_top .item:hover{background:#0087cd}#back_top .item:hover>svg{fill:#fff}#back_top .item:first-child{border-radius:.5em 0 0 0}#back_top .item:nth-child(3){border-radius:0 0 0 .5em}#back_top svg{width:30px;fill:#0087cd}#back_top .kefu{position:absolute;right:65px;height:90px;z-index:999;animation:fadeIn .3s ease-in-out}#back_top .kefu .kefu_box{border-radius:.5em;box-shadow:0 8px 16px 0 rgba(0,0,0,.1);background-color:#fff;color:#0087cd;height:100%;padding:10px 20px;margin-right:10px;display:flex;flex-direction:column;justify-content:space-around}#back_top .kefu svg{width:16px;fill:#0087cd}#back_top .kefu .text1{font-size:14px;margin-top:4px}#back_top .kefu .text2{font-size:19px;white-space:nowrap}@keyframes fadeIn{0%{opacity:0;transform:scale(.9) translateX(10%)}to{opacity:1;transform:scale(1) translateX(0)}}@media screen and (max-width:1200px){#back_top{width:10vw;height:auto;z-index:999}#back_top .item{width:10vw;height:10vw}#back_top .item svg{transform:scale(.8)}#back_top .kefu{right:11vw}}