.main{width: 1000px;margin: 50px auto;min-height: 350px}
table{border-top: 1px solid #5acaf6;border-left: 1px solid #5acaf6}

td{font-size: 16px;border-right: 1px solid #5acaf6;border-bottom: 1px solid #5acaf6;
padding: 15px 0px;text-align: center}
thead tr td{background: #008ae8;color: white}
 tr:nth-child(2n){color: black;background: #b8e5f6}
 tr:nth-child(2n+1){color: black;background: #e5f5ff}
tr td:nth-child(2n+1){width: 300px; }
tr td:nth-child(2n){width: 400px;}
.enter{    background:#5ec42c;
    border: 0px;
    padding: 5px 10px;
    color: white;
    border-radius: 4px;}
    .gostart{    
        margin-left: 15px;
        padding: 5px 10px;
        border: 0px;
        border-radius: 4px;
        background: #5ec42c;
        color: white;}