.yandex-checkout-header {
    position: relative;
    overflow: hidden;
    font-size: 18px;
    font-weight: normal;
    text-align: center;
    color: #b8b8b8;
}
.yandex-checkout-header > span {
    text-transform: uppercase;
    display: inline-block;
    margin: 0 .4em;
}
.yandex-checkout-header > span:before,
.yandex-checkout-header > span:after {
    content: '';
    position: absolute;
    width: 100%;
    border-top: 2px solid #b8b8b8;
    margin-top: .8em;
}
.yandex-checkout-header > span:before {
    margin-left: -102%;
}
.yandex-checkout-header > span:after {
    margin-left: 2%;
}