.heading-h1 {
    overflow: hidden;
    text-align: center;
}
.heading-h1:before,
.heading-h1:after {
    background-color: #1c1c1c;
    content: "";
    display: inline-block;
    height: 1px;
    position: relative;
    vertical-align: middle;
    width: 50%;
}
.heading-h1:before {
    right: 0.5em;
    margin-left: -50%;
}
.heading-h1:after {
    left: 0.5em;
    margin-right: -50%;
}

.heading-h2 {
    overflow: hidden;
    text-align: center;
}
.heading-h2:before,
.heading-h2:after {
    background-color: #1c1c1c;
    content: "";
    display: inline-block;
    height: 1px;
    position: relative;
    vertical-align: middle;
    width: 50%;
}
.heading-h2:before {
    right: 0.5em;
    margin-left: -50%;
}
.heading-h2:after {
    left: 0.5em;
    margin-right: -50%;
}