body {background: #efefef; font-size: 16px; line-height: 2;}
.title {margin: 0 0 28px;}
.subject {}
.subject2 {margin-bottom: 16px; }
summary {list-style-type: none; // or display: block; display: inline-block; cursor: pointer;}
summary::-webkit-details-marker { display: none; }
details {line-height: 1.7;}
details .answer {position: relative; margin-bottom: 20px; padding-left: 12px; margin-left: 30px;}
details .answer:before {content:''; position: absolute; top: 10px;
    left: 0;display: block; width: 6px; height: 6px; border-radius: 50%; background: #000;}