h2{
    position: relative;
    font-size: 1.143em;
    font-weight: bold;
    margin: 0 0 1.5em;
    padding: 0.5em 0.5em 0.5em 2.0em;
    border-bottom: 2px solid #B92A2C;
}
 
h2:before{
    content: "□";
    font-size: 200%;
    position: absolute;
    color: #ff6b6e;
    top: -0.8em;
    left: 0.3em;
    height: 12px;
    width: 12px;
}
 
h2:after{
    content: "□";
    font-size: 200%;
    position: absolute;
    color: #B92A2C;
    top: -0.5em;
    left: 0;
    height: 12px;
    width: 12px;
}

h3 {
border-bottom: solid 3px #c4a878;
}
HTMLコード