table {
        margin: auto;
    }
    
    #none {
        border-style: none;
    }
    
    #tableCaption {
        border-style: dashed;
        border-width: 1px;
    }
    
    td {
        border-style: dotted;
        border-width: 1px;
        padding: 10px;
        color: green;
    }
    
    th {
        border-style: dotted;
        border-width: 1px;
        padding: 10px;
        color: purple;
    }
    /* //答案 2D*/
    
    .content {
        color: green;
        font-family: Arial;
        font-size: 18px;
    }      
    #tableTitle {
        font-weight: bolder;
        font-size: 18px;
        color: purple;
        text-align: center
    }        
    a {
        color: black
    }
</style>