.page {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 0;
    bottom: 0;
    left: 0;
    right: 0;
}
.page-header {
    display: flex;
}
.page-header-btn-default {
    position: absolute;
    top: 15px;
    right: 5px;
    z-index: 2;
}
.page-body {
    flex: 1;
    overflow: auto;
    padding: 15px 20px 15px;
}
.page-footer {
    background-color: #f9f8f8;
    padding: 15px;
    /* box-shadow: 5px 3px 14px rgb(0 0 0 / 20%); */
    border-top: #e3e3e3 1px solid;
}
.page-title {
    flex: 1;
    font-size: 20px;
    padding: 15px;
    color: #545454;
    font-weight: bold;
}
.page-btn-left {
    padding: 15px 0 15px 15px;
}
.page-btn-rigth {
    padding: 15px 60px 15px 30px;
}