// 中心元素
.abs-center-container {
    position: relative;
}

.abs-center {
    overflow: auto;
    margin: auto;
    position: absolute;
    top: 0;
    left: 0;
    bottom: 0;
    right: 0;
    &.abs-fixed {
        position: fixed;
        z-index: 999;
    }
    &.abs-right {
        left: auto;
        right: 20px;
        text-align: right;
    }
    &.abs-left {
        right: auto;
        left: 20px;
        text-align: left;
    }
}

@media (max-width: 320px) {
    .abs-center {
        padding: 0 10px;
    }
}

@media (max-height: @screen-sm) {
    .abs-center {
        position: relative;
    }
}