.ost-header {
    @h-height: 45 * @BU;
    box-shadow: 0 0 4 * @BU 0 rgba(60,107,240,0.10);
    position: fixed;
    top:0;
    z-index: 999;
    width: 100%;
    height: @h-height;
    line-height: @h-height;
    background-color: #ffffff;
    color: #333;
    overflow: hidden;
    .ost-header-left {
        position: absolute;
        width: @h-height;
        height: @h-height;
        i { //左按钮为 返回箭头图标 时的样式
            width: 12 * @BU;
            height: 12 * @BU;
            border: 1 * @BU solid #BABFC9;
            transform:rotate(45deg);
            border-top: none;
            border-right: none;
            position: absolute;
            top:15 * @BU;
            left: 15 * @BU;
        }
    }
    .ost-header-title {
        font-size: 16 * @BU;
        width: 100%;
        text-align: center;
        height: 100%;
    }
    .ost-header-right {
        font-size: 14 * @BU;
        position: absolute;
        text-align: right;
        right: 0;
        top: 0;
        padding-right: 10 * @BU;
    }

    &-height-polyfill {
        height: @h-height;
        min-height: @h-height;
    }
}