.customize-section-heading {
    border-top: 1px double rgb(0 0 0 / 25%);
    border-bottom: 1px double rgb(0 0 0 / 25%);
    text-transform: uppercase;
    background-color: #ffffff;
    width: 100%;
    margin-left: -10px;
    padding: 6px 20px;
}

.customize-section-heading .customize-control-title {
    margin: 0;
}