.sl_index{
    width: 100%;
    height: 670px;
    background: url("../img/sl_bg.png") no-repeat center;
    -webkit-background-size:100%;
    background-size:100%;
    position: relative;
}
.sl_company{
    position: absolute;
    bottom: 20px;
}
.sl_company li{
    width: 320px;
    height: 220px;
    float: left;
    background-color: rgba(255,255,255,.8);
    margin-left: 20px;
}
.sl_company li:first-child{
    margin-left: 0;
}
.sl_company li:last-child{
    height:140px;
}
.sl_company li h4{
    position: relative;
    line-height:30px;
    padding-left: 25px;
    margin-top: 15px;
    font-weight: 700;
}
.sl_company li h4 span{
    position: absolute;
    left: 0;
    display: inline-block;
    width: 5px;
    height: 30px;
    background-color: #C40000;
}
.sl_company li p{
    margin: 0 auto;
    width: 273px;
    line-height: 23px;
}
.sl_company li .more{
    color: #C40000;
    display: inline-block;
    margin: 15px 0 0 25px;
}
.sl_company li img{
    margin-top: 41px;
}