html{
    scroll-behavior: smooth;
}
.gotop{
    display: block;
    width: 50px;
    height: 50px;
    box-sizing: border-box;
    background: rgba(0, 0, 0, 0.8);
    border: 1px solid #bbb;
    padding-top: 20px;
    text-align: center;
    letter-spacing: -1px;
    font-size: 85%;
    text-decoration: none;
    color: #fff;
    opacity: 0.5;
    position: fixed;
    bottom: 75px;
    right: 15px;
    z-index: 10;
}
.gotop::before{
    content: "";
    display: block;
    border-top: 2px solid #fff;
    border-right: 2px solid #fff;
    width: 25%;
    height: 25%;
    top: 25%;
    left: 0;
    right: 0;
    margin: auto;
    position: absolute;
    transform: rotate(-45deg);
}
.gotop:hover{
    opacity: 1;
}
@media(max-width:1024px){
    .gotop{
        display: none;
    }
}