.step{
    width: 450px;
    max-width: 80%;
    margin: 50px auto;
}

.step__inner{
    display: flex;
    flex-flow: row nowrap;
    align-items: center;
}
.step__circle{
    display: flex;
    justify-content: center;
    align-items: center;
    font-family: 'Heebo', sans-serif;
    font-size: 19px;
    font-weight: bold;
    line-height: 1;
    width: 45px;
    min-width: 45px;
    height: 45px;
    border-radius: 100%;
    background: #fff;
    box-shadow: 0 3px 6px 0 rgba(0, 0, 0, 0.16);
    position: relative;
}

.step__circleSup{
    display: block;
    font-size: 12px;
    white-space: nowrap;
    color: #000000;
    letter-spacing: .2em;
    position: absolute;
    left: 50%;
    bottom: -15px;
    transform: translate(-50%, 100%);
}

.step__border{
    width: calc(100% - 135px);
    height: 5px;
    background: #E8E8E8;
    position: relative;
}


.mainColor{
    color: #273960;
}

.mainBgColor{
    background: #273960;
    color: #fff;
}
.mainBorderColor::after{
    content: "";
    display: block;
    width: 0%;
    height: 100%;
    background: #273960;
    animation: borderAnim 2s ease-out forwards;
    position: absolute;
    top: 0;
    left: 0;
}

@keyframes borderAnim{
    0%{
        width: 0;
    }
    100%{
        width: 100%;
    }
    
}

@media screen and (max-width:768px) {
    .step__circle{
    font-size: 15px;
    width: 35px;
    min-width: 35px;
    height: 35px;
}
    .step__circleSup{
    font-size: 9px;
    bottom: -12px;
    transform: translate(-50%, 100%);
}
    .step__border{
    width: calc(100% - 105px);
}
}