html {


    scroll-behavior: smooth;


  }


  


  a.angle-down-btn:hover {


        opacity: 1;


  }


    


  a.angle-down-btn {


        font-size: 20px;


        width: 35px;


        height: 35px;


        background-color: #3FBE00;


        display: inline-block;


        color: #fff;


        position: absolute;


        left: 50%;


        bottom: 8px;


        text-align: center;


        border-radius: 50%;


        line-height: 39px;


        opacity: .8;


        transition: .3s;


        z-index: 99;


  }