, h1 . , h1 , ( , ), . , , . , , , , .
. :
h1:
h1 { font-weight: bold; }
h1 h2:
h1, h2 { margin: 10px; }
h1 id="main":
#main h1 { background: #ccc; }
h2 class="Info":
h2.Info { color: #000; }
h3 class="More":
.More h3 { text-decoration: underline; }