.box {
    margin: 100px auto 0;
    width: 80%
}

.clear:after {
    content: '';
    display: block;
    clear: both
}

.slider {
    margin: 12px 0;
    position: relative;
    width: 320px;
    height: 8px;
    background: #e6ecf1;
    border-radius: 4px;
    cursor: pointer;
}

    .slider .process {
        position: absolute;
        left: 0;
        top: 0;
        height: 8px;
        border-radius: 4px;
        overflow: hidden;
    }

.progress_wrap {
    position: absolute;
    left: 0;
    top: 0;
    width: 320px;
    height: 8px;
    border-radius: 4px;
    background: linear-gradient(90deg, #40e5f8, #5287ff);
}

.slider .thunk {
    position: absolute;
    left: 0;
    top: 50%;
    width: 18px;
    height: 18px;
    transform: translateY(-50%);
}

.slider .block {
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: #5287ff;
    transition: .2s all;
}

    .slider .block:hover + .tooltips {
        display: block;
    }

    .slider .tooltips {
        display: none;
        width: 48px;
        height: 36px;
        background: rgba(0,0,0,.8);
        border-radius: 4px;
        position: absolute;
        left: 50%;
        bottom: 30px;
        transform: translateX(-50%);
        text-align: center;
        line-height: 36px;
        color: #fff;
        white-space: nowrap;
    }

    .slider .tooltips i {
        position: absolute;
        left: 50%;
        bottom: -5px;
        transform: translateX(-50%);
        width: 0;
        height: 0;
        border-style: solid;
        border-width: 5px 5px 0 5px;
        border-color: rgba(0,0,0,.8) transparent transparent transparent;
    }

    .slider .block:hover {
        transform: scale(1.1);
    }