html{
    scroll-behavior: smooth;
    background: url(https://bkssl.bdimg.com/static/wiki-lemma/widget/lemma_content/configModule/secondsKnow/resource/img/bg-isScience_521f2a1.png) no-repeat center 0;
    background-color: #f5f5f5;
}
li>a>p{
    display: none;
}
.h_ste{
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    border:1px solid #e6e6e6;
    background-color: #fff;
    height: 96px; 
    width:960px;
    margin:auto;
}
.toutu{
    box-shadow: 2px 2px 1px #ddd;
    float: right;
    border-left: 1px solid #e6e6e6;
}
.bodyf_title{
    display:flex;
    flex-direction: column;
    align-items: center;
}
.li_txt {
    font-size: 12px;
    color:#666;
    line-height: 20px;
    margin-top: 9px;
}
.p_under_text{
    border:1px solid #e6e6e6;
    border-top: 0px;
}
.ttxt{
    border: 1px solid #e6e6e6;
    border-bottom: 0px;
    width:960px;
    background-color: #fff;
    margin: auto;
}
.lis{
    font-size:14px;
    line-height: 10px;
    color: #999;
    padding-right: 134px;
}
.dot{
    color: grey;
}
span.li_txt{
    padding-left: 2em;
    color: #aaa;
}
a{
    text-decoration: none;
    color:#136ec2;
    content-visibility: auto;
}
.link{
    width: 610px;
    height:175px;
    border-top: 1px solid #e6e6e6;
    border-bottom:1px solid #e6e6e6;
    padding:0 0 10px 0
}
p.link_r{
    margin: 20px 10px 0 34px;
    float: right;
    line-height: 48px;
    font-size: 18px;
}
div.link_r{
    float: left;
    height:175px;
}
.link_ts{
    display:flex;
    flex-direction: row;
    padding-top:10px;
}
div.link_r2{
    margin:0 0 0 30px;
    padding: 0 0 10px 30px;
    float: left;
    width: auto;
    border-left: 1px solid #e6e6e6;
}
.link_2{
    float:left;
    width:auto;
    margin:0 0 0 25px;
}
.dianxian{
    border: 2px;
    max-width: 450px;
    margin: 0;
    font-size:12px;
    border-style:dotted;
    border-left: 0;
    border-right:0;
    border-color:#e6e6e6;
    padding:2px;
}
.tsdianxian{
    margin:0;
    font-size:12px;
    max-width: 450px;
    padding:2px;
}
.tssdianxian{
    border-bottom: 2px dotted #e6e6e6;
    padding:2px;
    border-right:0;
    border-left:0;
    font-size:12px;
    margin: 0;
}
.start{
    display: flex;
    flex-direction: row;
    overflow:auto;
    margin-bottom: 30px;
    margin-top: -20px;
}
.start_right{
    float: right;
    min-width:450px;
    margin:1px;
}
.start_left{
    margin-bottom: 15px;
    margin:1px
}
.title{
    font-size:34px;
}
.blue_block{
    background-color:#4F9CEE;
    height:30px;
    float:left;
    min-width:12px;
    margin-left:-30px;
    margin-top:10px
}
.body_style{
    background-color: white;		
    width:900px;
    margin:50px auto;
    padding:30px;
    line-height:1.7;
    border:1px solid #e6e6e6;
}
.big_title{
    font-size:27px;
}
.big_title_line{
    color:#e6e6e6;
    font-size:5px
}
.medium_title{
    font-size:20px;
}
p.txt{
    text-indent:2em;
    font-size:16px;
}
.txt_s{
    text-indent:2em;
    font-size:12px;
    margin:0;
    line-height: 22px;
}

.flow_img{
    display: flex;
    flex-direction: row;
    overflow: auto;
    width:830px;
    margin:20px;
}
h5.txt{
    text-indent:2em;
}
img.picture{
    float:right;
    margin:10px;
}
.wxt{
    font-size: 22px;
    border-bottom:2px solid #e6e6e6;
    line-height: 45px;
}
.olst{
    padding:0 0 0 20px
}