.concept_hl {font-weight:bold;color:#0a0}
.concept_top {font-weight:bold;background-color:#ddd;color:#000}
p {margin:0 auto;width:70%;background-color:#ff9;padding:5px 2px;color:#333}
#xsub_body ul {margin:0 auto;background-color:#ff9;width:70%;padding:5px 2px}
#xsub_body li {margin-left:20px}