body {
    overflow-y: auto;
}

h3 {
    text-align: center;
    color: #FF0000;
}

h4 {
    text-align: center;
    color: #000000;
}

    h4 span {
        font-size: 20px;
    }

tbody > tr:first-child {
    background: #2e6da4;
    color: #fff;
}


tbody > tr:nth-child(n + 2) > th:first-child {
    background: #7fa0bd;
    color: #fff;
}

tbody > tr:nth-child(n + 2) > th:last-child {
    background: #D1D6EF;
    color: #444;
}

.title {
    height: 100px;
    line-height: 100px;
    font-family: 'Microsoft YaHei';
    font-size: 25px;
    font-weight: bold;
    color: #337ab7;
    border-bottom: 1px solid #ccc;
}

.query {
    margin-top: 20px;
}

.submit-btn {
    font-size: 14px;
}

.dialog-alert {
    border-radius: 15px;
    position: fixed;
    left: 20%;
    bottom: 50%;
    display: inline-block;
    width: 60%;
    background: lightyellow;
    color: #666;
    z-index: 2;
    border: 1px solid;
    display: none;
}

.db-btn {
    display: flex;
    justify-content: center;
    align-items: center;
    width: 60%;
    margin-left: 20%;
    height: 38px;
    font-size: 20px;
    background: #BF3EFF;
    color: #fff;
    margin-bottom: 20px;
    border-radius: 10px;
}


.mask {
    position: fixed;
    left: 0;
    top: 0;
    display: inline-block;
    width: 100%;
    height: 100%;
    background: #000;
    opacity: 0.4;
    z-index: 1;
    display: none;
}