.system-wrap {
    margin-top: 30px
}

.system-wrap .list {
    width: 26%;
    line-height: 60px
}

.system-wrap .list li {
    background: #ccc;
    padding: 0 10px;
    cursor: pointer
}

.system-wrap .list li.active {
    background: #999;
    color: white
}

.system-wrap .content {
    width: 74%;
    height: 100%;
    padding: 30px;
    box-sizing: border-box
}

@media (max-width: 996px) {
    .system-wrap {
        position: relative
    }

    .system-wrap .list {
        position: absolute;
        left: 0;
        width: 100%;
        max-width: 370px;
        transform: translateX(-99%);
        transition: transform .4s;
        z-index: 1
    }

    .system-wrap .content {
        width: 100%;
        padding: 8px
    }

    .system-wrap .show-list {
        position: fixed;
        left: 0;
        width: 30px;
        height: 30px;
        border: 1px solid #ccc;
        border-radius: 0 5px 5px 0;
        background: #ccc;
        transition: transform .4s;
        cursor: pointer;
        z-index: 2
    }

    .system-wrap .show-list::before,
    .system-wrap .show-list::after {
        content: '';
        position: absolute;
        top: 14px;
        left: 10px;
        width: 12px;
        height: 2px;
        background: white;
        transform-origin: 100% 50%
    }

    .system-wrap .show-list::before {
        transform: rotate(45deg)
    }

    .system-wrap .show-list::after {
        transform: rotate(-45deg)
    }
}