.butdivs{
    display: inline-block;
    width: 100%;
    border: 1px solid #eee;
    text-align: center;
    height: 1.9rem;
    line-height: 1.9rem;
    background-color: #f6f7fa;
    cursor: pointer;
}
.night .butdivs{
    background-color: #333;
    border: 1px solid #444;
}
.y2y .layui-form-select {
    width: calc(100% / 2 - 0.25rem);
    float: left;
    display: inline-block;
    margin-right: 0.25rem;
}
.y2y>div:last-child {
    float: right;
    margin-right: 0;
    width: calc(100% / 2);
}