body {
     background:#f5f5f5
 }
 .tag {
     font-size:12px;
     background:rgba(1,126,102,.08);
     color:#337ab7;
     display: inline-block
 }
 .tag a {
     font-weight:normal
 }
 .topic-content h1{
     font-size:30px;
 }
 .topic-content h2{
     font-size:26px;
 }
 .topic-content h3{
     font-size:22px;
 }
 .topic-content h4{
     font-size:18px;
 }
 .topic-content img {
     max-width: 100%;
     height: auto;
     display: block;
 }