body{
    width: 1000px;
    position: relative;
    margin: 0 auto;
    padding: 10px 0;
    font-family: Microsoft YaHei;
}
input{
    outline: none;
}
button{
    color: #3e89fa;
    background-color:white;
    border:1px solid #3e89fa;
    cursor: pointer;
    outline: none;
}
button:hover{
    color: white;
    background-color: #3e89fa;
}
#num{
    display: flex;
    align-items: flex-end;
    justify-content: flex-start;
}
#num li{
    width: 15px;
    background: red;
    list-style: none;
    float: left;
    margin-left: 3px;
    cursor: pointer;
    font-size: 6px;
}