/* *删除所有边缘与填充，a的默认样式删除。 */
* {
    margin: 0;
    padding: 0;
}

a {
    text-decoration: none;
}

body {
    background: grey url(./img/back-wall5.jpg) no-repeat center center;
    background-size: cover;
}

kbd {
    border: 1px solid red;
    width: 4em;
    height: 4em;
    display: inline-block;
    text-transform: uppercase;
    position: relative;
}

kbd>button {
    position: absolute;
    right: 2px;
    bottom: 2px;
    display: none;
    font-size: 9px;
}

kbd:hover>button {
    display: inline-block;
}

main {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

#keyContainer {
    display: inline-block;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}

#keyContainer>div:nth-child(2) {
    margin-left: -22px;
}

#keyContainer>div:nth-child(3) {
    margin-left: -102px;
}

.key1 {
    width: 50px;
    height: 40px;
    background: linear-gradient(to bottom, #111111 0%, #292929 100%);
    border: 1px solid #373737;
    border-radius: 7px;
    color: #C5C5C5;
    box-shadow: 0 0 0 1px #1A1B1C, 0 0 0 1px #1F2020, 0 1px 0 1px #080808;
    /* display: inline-flex;
align-items: center;
justify-content: center; */
    font-size: 16px;
    font-family: Helvetica;
    position: relative;
}

.row {
    margin: 13px;
}

.row .key1 {
    margin: 0 10px;
}

.key1 img {
    width: 16px;
    height: 16px;
    position: absolute;
    left: 4px;
    bottom: 2px;
}

.key1 .spanText {
    position: absolute;
    left: 6px;
    top: 2px;
}