.banner{
    width: 100%;
}
.banner img{
    width: 100%;
    margin-top: -4px;
}
.navigationbox{
    border-bottom: 1px solid rgba(240,240,240,1);
    margin-bottom: 110px;
}
.navigation li{
    float: left;
}
.navigation li a{
    font-size: 20px;
    color: #666;
    display: block;
    padding: 20px 60px 20px 0;
}
.navigation .active a{
    color: #333;
}
.title{
    font-size: 32px;
    width: 20%;
    color: #666;
}
.content{
    font-size: 18px;
    color: #666;
    line-height: 40px;
    width: 78%;
}
.textfloat{
    margin-bottom:100px;
}

/* 四个盒子均匀分配 */
.flexbox{
    display: flex;
    margin-bottom: 180px;
}
.item{
    flex: 1;
}
.boxa{
    background: url("../images/sy-image1.png") no-repeat center;
    background-size: cover;margin-right: 5px;
}
.boxb{
    background: url("../images/sy-image2.png") no-repeat center;
    background-size: cover;
    margin: 0 5px;
}
.boxc{
    background: url("../images/sy-image3.png") no-repeat center;
    background-size: cover;
    margin: 0 5px;
}
.boxd{
    background: url("../images/sy-image4.png") no-repeat center;
    background-size: cover;
    margin-left: 5px;
}
.iteminfo img{
    display: block;
    margin: 76px auto 60px;

}
.iteminfo h4{
    font-size: 22px;
    color: #fff;
    text-align: center;
    margin-bottom: 58px;
}
.iteminfo p{
    text-align: center;
    font-size: 16px;
    color: #fff;
    padding: 0 30px;
    line-height: 26px;
    margin-bottom: 124px;
}
/* 文字图片排列 */
.textblock{
    width: 42%;
    margin-right: 63px;
}
.textblock h4{
    font-size: 32px;
    color: #333;
    margin-bottom: 41px;
}
.textblock p{
    font-size: 18px;
    line-height: 30px;
    color: #666;
}
.imgblock{
    width: 51%;
}
.imgblock img{
    width: 100%;
}
.nexttextblock{
    margin-right: 0;
}
.nexttextblock p{
    margin-top: 90px;
    margin-left: 25px;
    text-align: justify;
}
.secondbox{
    position: relative;
    top: -48px;
    z-index: -1;
}