.banner_wrap{
    background: url(../images/banner.png) no-repeat center;
}
.lb_serve{
    height: 590px;
}
.lb_serve ul{
    display: flex;
    padding-top: 46px;
    justify-content: space-around;
}
.lb_serve ul>li{
    text-align: center;
    width: 240px;
}
.lb_serve ul>li>i{
    font-size: 120px;
    color: #000;
}
.lb_serve ul li p.title{
    font-size: 20px;
    color: #343f4b;
    padding: 32px 0;
}
.lb_serve ul li .desc{
    color: #7d858e;
    line-height: 25px;
}
/* 我们的优势 */
.lb_advantage{
    height: 620px;
    background: url(../images/advantage_bg.png) center no-repeat;
    
}
.lb_advantage .desc{
    color: #7d858e;
    line-height: 25px;
    width: 800px;
    text-align: center;
    margin: 0 auto;
}
.lb_advantage ul{
    padding-top: 90px;
    display: flex;
    flex-wrap: wrap;
}
.lb_advantage ul>li{
    width: 33.3%;
    padding-bottom: 60px;
}
.lb_advantage ul li .icon{
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: 1px solid #3192f7;
    line-height: 80px;
    text-align: center;
    margin-right: 10px;
    display: inline-block;
}
.lb_advantage .iconfont{
    font-size: 36px;
    color: #3192f7;
}
.lb_advantage .adv_content{
    display: inline-block;
    vertical-align: top;
}
.lb_advantage .adv_content .adv_title{
    font-size: 20px;
    color: #343f4b;
    padding-top: 16px;
    text-align: left;
}
.lb_advantage .adv_content .text{
    color: #999;
    padding-top: 15px;
}

/* 体验 */
.lb_experience{
    height: 360px;
    background: url(../images/experience_bg.png) no-repeat center;
    
}
.lb_experience h2{
    color: #fff;
    font-size: 36px;
    padding: 90px 0 60px 0;
    text-align: center;
}
.lb_experience .input_wrap{
    width: 590px;
    height: 50px;
    border-radius: 4px;
    background: #fff;
    margin: 0 auto;
}
.lb_experience .input_wrap input{
    width: 413px;
    height: 50px;
    padding: 0 20px;
    font-size: 16px;
    border: none;
    margin-left: 5px;
}
.lb_experience .experience_btn{
    width: 132px;
    height: 50px;
    line-height: 50px;
    background: #44dba8;
    text-align: center;
    color: #fff;
    vertical-align: top;
    float: right;
    border-top-right-radius: 4px;
    border-bottom-right-radius: 4px;
    font-size: 16px;
}
.lb_experience .desc{
    color: #fff;
    font-size: 16px;
    text-align: center;
    padding-top: 50px;
}

/* 技术支持 */
.lb_support .lb_item_desc{  
    padding-bottom: 62px;   
}

/* 承诺 */
.lb_promise{
    height: 750px;
    background: url(../images/commitment_bg.png) center no-repeat;
    
}
.lb_promise ul{
    display: flex;
    justify-content: space-around;
    padding-top: 80px;
}
.lb_promise ul li{
    width: 208px;
    height: 360px;
    background: #fff;
    padding: 0 26px;
    text-align: center;
}
.lb_promise .pro_icon{
    width: 120px;
    height: 120px;
    line-height: 120px;
    text-align: center;
    border-radius: 50%;
    background: #58b8fd;
    margin-top: 40px;
    display: inline-block;
}
.lb_promise .iconfont{
    font-size: 56px;
    color: #fff;
}
.lb_promise .shadow{
    height: 16px;
    background: url(../images/pro_shadow.png) center no-repeat;
    margin-top: 11px;
}
.lb_promise .title{
    font-size: 20px;
    color: #343f4b;
    padding: 27px 0 20px 0;
}
.lb_promise .desc{
    color: #999;
    line-height: 25px;
}