body {
    overflow-x: hidden;
}
html, body, div, span, applet, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, a, abbr, acronym, address, big, cite, code, del, dfn, em, img, ins, kbd, q, s, samp, small, strike, strong, tt, var, b, u, i, center, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, caption, article, aside, canvas, details, embed, figure, figcaption, footer, header, hgroup, menu, nav, output, ruby, section, summary, time, mark, audio, video {
    margin: 0;
    padding: 0;
    border: 0;
    font-size: 100%;
    font: inherit;
    vertical-align: baseline;
    outline: none;
    font-family: "microsoft yahei";
    font-size: 12px;
    color: #333;
}
.top{
    width: 1200px;
    height: 150px;
    margin: 0 auto;
}
.l{float: left ;}
.r{float: right;}
.tel{height: 65px;padding-top: 35px;}
.main{
    width: 1200px;
   margin: 0 auto;
    overflow: hidden;
}
.nav {
    width: 100%;
    height: 52px;
    background: #005bac;
    overflow: hidden;
}
.w {
    width: 1200px;
    margin: 0 auto;
}
.nav ul li {
    float: left;
    position: relative;
    text-align: center;
    z-index: 2;
}
.nav ul li a:hover, .nav ul li a.hover {
    background: #ff7e00;
    border-color: #ff7e00;
}
.nav ul li a {
    color: #fff;
    font-size: 14px;
    display: block;
    height: 52px;
    line-height: 52px;
    padding: 0px 50px;
    border-right: 1px solid #014683;
    border-left: 1px solid #006dce;
}
a {
    text-decoration: none;
    color: #333;
}
a:hover {
    text-decoration: none;
    color: #005bac;
}
ol, ul {
    list-style: none;
}
.main .product-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    margin: 20px 0;
}
.main .product-item {
    font-size: 20px;
    color: #ffffff;
    padding: 14px 20px;
    border: 1px solid #ddd;
    border-radius: 6px;
    margin: 0 20px 20px 0;
    background-color: #00339b;
}

.main .product2-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    margin: 20px 0;
}
.main .product2-item {
    font-size: 20px;
    color: #ffffff;
    padding: 3px 3px;
    border-radius: 6px;
    margin: 0 5px 5px 0;
}
.product2-item img{
    width: 280px;
}
.main-item{
    width: 100%;
    height: auto;
    overflow: hidden;
    background-color: #f2f2f2;
    margin: 20px 0;
}
.item-title{
    word-spacing: normal;
    text-align: center;
    margin: 30px 10px;

    font-size: 30px;
    font-weight: bold;
    font-stretch: normal;
    letter-spacing: 0px;
    color: #353433;
}
.com-text {
    line-height: 28px;
    font-size: 17px;
    letter-spacing: 3px;
    color: #424242;
}
 .news-box{
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    margin: 10px 0;
}
 .news-item {
    width: 550px;
    font-size: 18px;
    padding: 14px 20px;
    overflow: hidden;
}
.news-item .title{
    font-weight: bold;
    width: 550px;
    overflow: hidden;
}
.footer{
    width: 100%;
    height: auto;
    overflow: hidden;
    background-color: #3e3e3e;
    padding: 10px 10px;
}
.footer-txt ,h1 {
    padding-top: 20px;
    line-height: 30px;
    font-size: 17px;
    letter-spacing: 3px;
    color: #ffffff;
}