body {
    margin: 20px;
    padding: 0;
    height: 100vh;

    justify-content: center;
    align-items: center;
    font-family: "Arial";
}

div.container {
    background-color: rgb(22, 22, 22);
    width: 2000px;
    padding: 10px;
    /* height: 450px; */
    /* display: flex; */

    justify-content: center;
    border-radius: 10px;
    align-items: center;
}

#functionLine {
    position: relative;
    background-color: rgb(255, 255, 255);
    width: 2020px;
    margin: 30px;
    left: -30px;
    top: 20px;
    border-radius: 10px;
    height: 50px;
    display: flex;
}

div.key.while {
    background: linear-gradient(#fff 96%, #eee 4%);

    width: 40px;
    height: 150px;
    border-radius: 0 0 5px 5px;
    box-sizing: border-box;
    border: 2px solid;
    border-color: rgb(0, 0, 0);
}

div.key.black {
    background: linear-gradient(#333, #000);
    width: 24px;
    height: 100px;
    margin: 0 -12px 0 -12px;
    z-index: 1;
    border-radius: 0 5px 5px;
    box-sizing: border-box;
    border: 2px solid;
    border-color: rgb(0, 0, 0);
}

div.key.black:active {
    position: relative;
    left: 1px;
    top: 5px;
}

div.key.while:active {
    position: relative;
    left: 1px;
    top: 5px;
}

#biaoji:active {
    position: relative;
    left: 1px;
    top: 1px;
}

#clear:active {
    position: relative;
    left: 1px;
    top: 1px;
}

#bofang:active {
    position: relative;
    left: 1px;
    top: 1px;
}

div.keys {
    display: flex;
    justify-content: center;
    margin: 0;
}

.key.while > .key.name {
    position: relative;
    bottom: -120px;
    left: 13px;
    color: #838383;
    user-select: none;
}

.key.black > .key.name {
    position: relative;
    bottom: -55px;
    left: 1px;
    color: #838383;
    user-select: none;
}

.guide {
    display: flex;
}

.guideLine {
    position: relative;
    width: 280px;
    box-sizing: border-box;
    margin-top: 3px;
    left: 20px;
    text-align: center;
    border-radius: 3px;
    color: #000000;
    border: 2px #000 solid;
    background-color: #fd820f;
    user-select: none;
}

#clear {
    position: relative;
    margin-bottom: 10px;
    margin-right: 10px;
    width: 150px;
    height: 50px;
    border-radius: 5px;
    border: 10px rgb(0, 0, 0) solid;
    color: rgb(255, 255, 255);
    background-color: #000000;
    font-family: "SimHei";
    font-size: large;
}

#bofang {
    position: relative;
    margin-bottom: 10px;
    margin-right: 10px;
    width: 150px;
    height: 50px;
    border-radius: 5px;
    border: 10px rgb(0, 0, 0) solid;
    color: rgb(255, 255, 255);
    background-color: #000000;
    font-family: "SimHei";
    font-size: large;
}

#biaoji {
    position: relative;
    margin-bottom: 10px;
    margin-right: 10px;
    width: 150px;
    height: 50px;
    border-radius: 5px;
    border: 10px rgb(0, 0, 0) solid;
    color: rgb(255, 255, 255);
    background-color: #000000;
    font-family: "SimHei";
    font-size: large;
}

@import url("https://fonts.googleapis.com/css2?family=Poppins&display=swap");

.key_interval {
    position: relative;
    padding-top: 5px;
    top: 0px;
    font-size: 30px;
    font-family: "poppins", sans-serif;
    width: 110px;
    height: 44px;
    background-color: #000;
    border-radius: 3px;
    color: #fff;
    text-align: center;
    margin-right: 0px;
}

.key_interval2 {
    position: relative;
    padding-top: 5px;
    top: -32px;
    left: -10px;
    font-size: 15px;
    font-family: "poppins", sans-serif;
    width: 110px;
    height: 25px;
    background-color: #000;
    border-radius: 3px;
    color: #fff;
    text-align: center;
    font-family: "SimHei";

    margin: 0 -53px 0 -55px;
}
small {
    font-size: medium;
}
#up {
    position: relative;
    margin-bottom: 10px;
    margin-right: 10px;
    width: 50px;
    height: 50px;
    border-radius: 5px;
    border: 10px rgb(255, 162, 0) solid;
    color: rgb(0, 0, 0);
    background-color: rgb(255, 162, 0);
    font-family: "SimHei";
    font-size: large;
    padding-top: 8px;
}
#down {
    position: relative;
    margin-bottom: 10px;
    margin-right: 10px;
    width: 50px;
    height: 50px;
    border-radius: 5px;
    border: 10px rgb(255, 162, 0) solid;
    color: rgb(0, 0, 0);
    background-color: rgb(255, 162, 0);
    font-family: "SimHei";
    font-size: large;
    padding-top: 8px;
}

#down:active {
    position: relative;
    left: 1px;
    top: 1px;
}

#up:active {
    position: relative;
    left: 1px;
    top: 1px;
}