* {
    margin: 0px;
    padding: 0px;
    box-sizing: border-box;
}

html, body {
    height: 100%; 
    font-family: Arial, sans-serif; /* 为页面添加默认字体 */
}

a:hover, a:visited, a:link, a:active {
    text-decoration: none;
    color: #000000;
}

.top {
    margin-top: 25px;
    text-align: center;
}

.content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    width: calc(100% - 60px); /* 考虑到左右的30px边距 */
}

.h2 {
    margin-top: 20px;
}

.enter {
    margin-top: 95px;
    margin-bottom: 20px;
    border: none;
}

.bottom {
    position: absolute;
    bottom: 30px;
    width: 100%;
    text-align: center;
}