去除a標籤默認樣式

a{
        text-decoration:none;
        font-size: 1.5rem;
        color:#fff;
}
a:link{
        color:#fff;
        text-decoration: none; 
}
a:visited{
        color:#fff;
        text-decoration: underline; 
}
a:hover{
        color:#fff;
        text-decoration: none; 
}

a:actived{
        color:red;
        text-decoration: none; 
}