html,
body {
    margin: 0;
    padding: 0;
    background-color: rgb(35, 36, 35);
    background-image: linear-gradient(-45deg, rgba(255, 255, 255, 0.05) 25%,
            transparent 25%, transparent 50%,
            rgba(255, 255, 255, 0.05) 50%,
            rgba(255, 255, 255, 0.05) 75%,
            transparent 75%, transparent);
    background-attachment: fixed;
    background-size: 400px 400px;
    background-position: 0 0, 400px 400px;
    animation: moveBg 4s linear infinite;
    font-family: -apple-system, BlinkMacSystemFont, Helvetica Neue, PingFang SC, Microsoft YaHei, Source Han Sans SC, Noto Sans CJK SC, WenQuanYi Micro Hei, sans-serif;
}

@keyframes moveBg {
    from {
        background-position: 0 0, 400px 400px;
    }

    to {
        background-position: 400px 0, 0 400px;
    }
}

.card {
    text-align: center;
    color: #fbfffbdb;
    margin: 0 auto;
    margin-top: 100px;
    background-color: rgb(62, 65, 62);
    padding: 25px 5px;
    width: 340px;
    border-radius: 10px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, .19), 0 6px 6px rgba(0, 0, 0, .23);
}

img {
    width: 220px;
    height: 220px;
    border-radius: 50%;
    margin-bottom: 1rem;
}

h1,
p {
    margin-bottom: 0;
    margin-top: 0.25rem;
}

.btn-box {
    margin-left: 15%;
    width: 70%;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
}

.btn {
    box-shadow: -1px 4px 13px 0px rgba(0, 0, 0, .1);
    width: 85px;
    margin: 0 auto;
    margin-top: 1rem;
    padding: 12px 10px;
    border-radius: 25px;
    font-size: 90%;
    cursor: pointer;
    margin-bottom: 0.75rem;
}

.btn-a {
    text-decoration: none;
    color: #fbfffbdb;
}

.url {
    opacity: 0.6;
}

.tips {
    font-size: 80%;
    margin-top: 0.5rem;
}

.email {
    color: #fbfffbdb;
    background-color: rgb(81, 85, 81);
    padding: 3.5px 5px;
    border-radius: 5px;
}