.jianjie { width: 650px; margin: 0 auto; } .jianjie p { text-indent: 2em; line-height: 30px; } .jianjie h1 { text-align: center; line-height: 30px; color: #F00; } .jianjie .intropic { float: right; background: #eeeeee; padding: 5px; border: #cccccc 1px solid; margin-left: 15px; margin-bottom: 15px; } .jianjie dc { line-height: 30px; text-align: center; border: 1px solid #d2d2d2; }