body {
    font-size: 16px;
    line-height: 2;
    color: #333;
}

* {
    box-sizing: border-box;
}

.text-center {
    text-align: center;
}

.cont {
    position: relative;
    box-sizing: border-box;
    max-width: 1200px;
    margin: 0 auto;
}

.mb-10 {
    margin-bottom: 10px;
}

.mb-20 {
    margin-bottom: 20px;
}

.mb-30 {
    margin-bottom: 30px;
}

.mb-40 {
    margin-bottom: 40px;
}

.m-0 {
    margin: 0 !important;
}

.mr-30 {
    margin-right: 30px;
}

.my-10 {
    margin: 10px 0;
}

#banner {
    position: relative;
    width: 100%;
}

#banner {
    background: url(../images/banner.png) center no-repeat;
    background-size: cover;
    height: 680px;
    padding: 0;
}

#banner .cont {
    position: relative;
}

#nav {
    font-size: 18px;
    line-height: 80px;
    overflow: hidden;
    height: 80px;
    background: #183883;
    display: none;
}

#nax .navbox {
    width: 100%;
}

#nav .a {
    visibility: visible;
    float: left;
    width: 200px;
    -webkit-animation-name: fadeInRight;
    animation-name: fadeInRight;
}

#nav .a a {
    display: block;
    text-align: center;
    color: #fff;
}

#nav .a:hover,
#nav .a.on {
    background-color: #3458ad;
}

#nav.on {
    position: fixed;
    z-index: 1000;
    top: 0;
    right: 0;
    left: 0;
    display: block;
}

.title {
    color: #183883;
    text-align: center;
    line-height: 140px;
    font-size: 38px;
}

.title .t {
    margin: 0 15px;
}

.title img {
    margin-top: -5px;
}

#part1 .img-text>div {
    width: 600px;
    float: left;
}

#part1 .img-text .text {
    padding-top: 20px;
    padding-left: 40px;
}

#part1 .img-text p:first-child {
    margin-bottom: 30px
}


/**/

#part2 {
    background-color: #f6f6f6;
}

#part2 li {
    border-bottom: 2px solid #cccccc;
    padding: 30px 0;
}

#part2 .img-text .img {
    width: 184px;
    float: left;
}

#part2 .img-text .text {
    padding-left: 224px;
}

#part2 .img-text .text p:first-child {
    font-size: 20px;
    margin-bottom: 20px;
    line-height: 1;
}


/*项目设置*/

#part3 {
    background-image: url(../images/part-3-bg.png);
    background-size: cover;
    color: #fff;
}

#part3 ul {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
}

#part3 .item {
    width: 580px;
    background-image: url(../images/part-3-item-bg.png);
    background-size: cover;
    flex-shrink: 0;
    padding: 30px;
}

#part3 .item .t {
    border-left: 6px solid #fff;
    line-height: 1;
    font-size: 20px;
    height: 20px;
    margin-bottom: 20px;
    padding-left: 20px;
    font-weight: bold;
}


/* part4 */

#part4 {
    background-color: #f6f6f6;
}

#part4 .text {
    width: 550px;
    line-height: 1.8;
}

#part4 .text li {
    border-bottom: solid 1px #cbcccc;
    padding: 30px 0;
}

#part4 .text .left {
    font-size: 48px;
    width: 44px;
    line-height: 1;
    color: #183883;
    float: left;
    margin-top: -14px;
}

#part4 .text .right {
    margin-left: 75px;
}

#part4 .img {
    float: right;
}

#part5 ul {
    margin-bottom: 30px;
}

#part5 li.t {
    display: inline-block;
    width: auto;
    height: 54px;
    background-color: #e3e7f0;
    border-radius: 10px;
    padding: 0 40px;
    font-size: 18px;
    color: #183883;
    line-height: 54px;
    font-weight: bold;
    margin: 10px 0;
}

#part5 li.t.on {
    background-color: #183883;
    color: #fff;
}

#part5 .help-text {
    color: #333333;
}

#part5 .help-text strong {
    color: #183883;
}


/* 联系我们 */

#part6 {
    background-image: url(../images/part-6-bg.png);
    background-size: cover;
    color: #fff;
    height: 398px;
}

#part3 .title,
#part6 .title {
    color: #fff;
}

#part6 ul {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#part6 ul li {
    display: flex;
    align-items: center;
}

#part6 ul li .icon {
    width: 66px;
    flex-shrink: 0;
}

#part6 ul li .text {
    padding-left: 20px;
}