body {
    margin: 0;
    box-sizing: border-box;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
}

body pre {
    font-family: Microsoft YaHei;
    font-size: 1rem;
    width: 960px;
    text-align: right;
    padding-right: 20px;
    margin-top: 0px;
}

a {
    text-decoration: none;
    border: 1px solid #ccc;
    border-radius: 5px;
    padding: 5px 10px;

    display: flex;
    position: relative;
    top: 26px;
    left: 10px;
}

a:hover {
    border-color: #000;
}

body p {
    margin-top: auto;
    margin-bottom: 10px;
}

/* 针对移动设备的 */
@media (max-width: 980px) {
    body pre {
        font-size: 1.4rem;
    }

    a {
        top: 35px;
    }
}