body {
    background-color: rgb(242, 243, 245);
}

ul {
    list-style-type: none; /* 移除圆点 */
    padding-left: 0;
    margin-left: 0;
}

table {
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid black;
}

a {
    text-decoration: none;
}