a.totop{position:fixed;display:none;width:48px;height:48px;font-size:12px;text-align:center;text-decoration:none;color:#fff;background-color:rgba(0,0,0,.6);bottom:20px;right:20px;cursor:pointer;z-index:998}a.totop:before{display:block;font-size:32px;margin-top:10px;margin-bottom:-12px}a.totop:hover{text-decoration:none}@media screen and (max-width:1535px){a.totop{display:none!important}}.mt-back-top{--mt-back-top-left:auto;--mt-back-top-right:40px;--mt-back-top-bottom:40px;--mt-back-top-z-index:1000;--mt-back-btn-after-text:"TOP";position:fixed;display:flex;align-items:center;justify-content:center;width:48px;height:48px;font-size:12px;text-align:center;text-decoration:none;color:#fff;background-color:#0009;bottom:var(--mt-back-top-bottom,40px);z-index:var(--mt-back-top-z-index,1000);cursor:pointer;transition:background-color .3s ease;opacity:0}.mt-back-top:hover{background-color:#000c}.mt-back-top--left{left:var(--mt-back-top-left,auto);right:auto}.mt-back-top--right{left:auto;right:var(--mt-back-top-right,40px)}.mt-back-top .mt-icon-sort-up{display:flex;flex-direction:column;align-items:center;justify-content:center}.mt-back-top .mt-icon-sort-up:before{content:"";width:0;height:0;border-left:10px solid transparent;border-right:10px solid transparent;border-bottom:10px solid #fff;margin-bottom:4px}.mt-back-top .mt-icon-sort-up:after{content:var(--mt-back-btn-after-text,"TOP");font-size:10px;line-height:1}.mt-sort-up-visible{opacity:1}