.banner{
    text-align:center;
    color:#fff;
    background:url(../../images/index/banner.jpg)
   }
   #bbs {
        padding: 80px 0;
        text-align: center;
    }
   #bbs a {
        color: #212121;
        text-decoration: none;
    }
    #bbs img {
margin: 0 auto;
}
#html5, #bootstrap {
padding: 80px 0;
}
#html5 {
background: #f8f8f8;
}
.h1, .h2, .h3, .h4, .h5, .h6, h1, h2, h3, h4, h5, h6 {
font-family: inherit;
font-weight: 500;
line-height: 1.1;
color: inherit;
}
.h1, .h2, .h3, h1, h2, h3 {
margin-top: 20px;
margin-bottom: 10px;
}
.h2, h2 {
font-size: 30px;
}
#html5 h2, #bootstrap h2 {
font-weight: bold;
}

footer {
font-weight: 400;
text-align: center;
padding: 20px;
color: #999;
}
#jjz {
background: #f1f1f1;
padding: 80px 0;
}
.jjz_content {
background: #f8f8f8;
padding: 30px;
}