.positionRel {
    position: relative;
    left: 50%;
    transform: translateX(-50%);
}

.banner {
    margin-top: 85px;
    width: 100%;
    height: 538px;
    /* background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/banner.jpg') no-repeat center; */
}

.bgBody1 {
    width: 1653px;
    height: 703px;
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/bg1.png') no-repeat;
    position: relative;
    left: 50%;
    transform: translatex(-50%);
    margin-top: 70px;
}

.body1 {
    width: 1400px;
    height: 600px;
    overflow: hidden;
    /* background: #f7f7f7; */
    margin: auto;
}

.body1 h1 {
    font-size: 50px;
    color: #1075bb;
    letter-spacing: 2px;
    text-align: center;
    margin-bottom: 18px;
    font-weight: 600;
    margin-top: 80px;
}

.body1 ul {
    width: 80%;
    margin: auto;
    display: flex;
    margin-top: 74px;
}

.body1 ul li {
    position: relative;
    width: 20%;
    transition: 500ms;
}

.body1 ul li:hover img {
    position: relative;
    opacity: 0.8;
    transition: 500ms;
}

.body1 ul li img {
    width: 100%;
}

.body1 ul li h2 {
    font-family: 'SourceHanSansCN-Medium', sans-serif;
    font-weight: 600;
    position: absolute;
    font-size: 24px;
    color: #fff;
    letter-spacing: 1px;
    left: 50%;
    transform: translateX(-50%);
    top: 60px;
    letter-spacing: 1px;
    width: 100%;
    text-align: center;
}

.body1 ul li p {
    position: absolute;
    font-size: 20px;
    color: #fff;
    /* letter-spacing: 100px; */
    /* spacing: 100px; */
    width: 74%;
    text-align: justify;
    line-height: 28px;
    left: 50%;
    transform: translateX(-50%);
    top: 110px;
    letter-spacing: 0.8px;
}

.body1 ul li:nth-of-type(2n) h2,
.body1 ul li:nth-of-type(2n) p {
    color: #036eb7;
}

.bgBody2 {
    width: 1653px;
    height: 832px;
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/bg2.png') no-repeat;
    position: relative;
    left: 50%;
    transform: translatex(-50%);
    margin: 80px 0;
}

.body2 {}

.body2 h1 {
    font-size: 50px;
    color: #1075bb;
    letter-spacing: 2px;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 600;
    padding: 70px 0 50px 0;
}

.body2 ul {
    display: flex;
    justify-content: space-between;
    width: 1200px;
    margin: auto;
}

.body2 ul li {}

.body2 ul li h2 {
    width: 115px;
    height: 400px;
    background: #036eb7;
    float: left;
    cursor: pointer;
}

.body2 ul li h2 span {
    display: block;
    font-size: 24px;
    width: 24px;
    text-align: center;
    margin: auto;
    color: #fff;
    margin-top: 60px;
    line-height: 30px;
}

.body2 ul li img {
    height: 400px;
    float: left;
    width: 0;
}

.body2 ul li:nth-child(1) img {
    width: auto;
}

.body2 div {
    font-family: 'SourceHanSansCN-Regul', sans-serif;
    width: 1080px;
    border: 2px solid #036eb7;
    padding: 30px 60px;
    margin: auto;
    margin-top: 10px;
    letter-spacing: 2px;
    color: #036eb7;
    /* font-weight: 600; */
    display: none;
    font-weight: 400;
    font-size: 21px;
    line-height: 30px;
}

.body2 div:nth-child(3) {
    display: block;
}

.titleD {
    font-size: 50px;
    color: #1075bb;
    letter-spacing: 1px;
    text-align: center;
    margin: 60px 0;

    font-weight: 600;
}

.bgBody3 {
    width: 1650px;
    height: 1303px;
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/bg3.png') no-repeat;
    position: relative;
    left: 50%;
    transform: translatex(-50%);
}

.body3 {
    width: 1200px;
    height: 485px;
    background: #fff;
    margin: auto;
    overflow: hidden;
}

.body3 h1 {
    font-size: 30px;
    color: #000000;
    letter-spacing: 1px;
    text-align: center;
    margin-top: 60px;
    margin-bottom: 60px;
}

.body3 ul {
    width: 810px;
    margin: auto;
    display: flex;
    justify-content: space-between;
}

.body3 ul li {
    width: 220px;
    height: 210px;
    border: 1px solid #1c92f2;
    background-color: #1c92f2;
    border-radius: 5px;
    position: relative;
    transition: 500ms;
}

.body3 ul li:hover {
    background: #1c92f2;
    transition: 500ms;
}

.body3 ul li:nth-child(1):after,
.body3 ul li:nth-child(2):after {
    content: '';
    width: 19px;
    height: 22px;
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/arrow.png');
    background-size: 100% 100%;
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    right: -50px;
}

.body3 ul li div {
    width: 74px;
    height: 72px;
    margin: auto;
    margin-top: 48px;
    margin-bottom: 26px;
    transition: 500ms;
}

/* .body3 ul li:nth-child(1) div {
    background: url(../img/channel/ico11.png);
}

.body3 ul li:nth-child(2) div {
    background: url(../img/channel/ico22.png);
}

.body3 ul li:nth-child(3) div {
    background: url(../img/channel/ico33.png);
} */
/* 
.body3 ul li:nth-child(1):hover div {
    background: url(../img/channel/ico1.png);
    transition: 500ms;
}

.body3 ul li:nth-child(2):hover div {
    background: url(../img/channel/ico2.png);
    transition: 500ms;
}

.body3 ul li:nth-child(3):hover div {
    background: url(../img/channel/ico3.png);
    transition: 500ms;
} */


.body3 ul li:nth-child(1) div {
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/ico1.png');
    transition: 500ms;
}

.body3 ul li:nth-child(2) div {
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/ico2.png');
    transition: 500ms;
}

.body3 ul li:nth-child(3) div {
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/ico3.png');
    transition: 500ms;
}


.body3 ul li p {
    font-size: 22px;
    text-align: center;
    letter-spacing: 1px;
    font-weight: 600;
    transition: 500ms;
    color: #fff;
}

/* .body3 ul li:hover p {
    color: #fff;
    transition: 500ms;
} */

.body4 {
    width: 1200px;
    height: 436px;
    background: url('https://school-resource-file.oss-cn-beijing.aliyuncs.com/web/img/channel/back.png');
    background-size: 100% 100%;
    margin: auto;
    overflow: hidden;
}

.body4 h1 {
    font-size: 30px;
    color: #308ad5;
    letter-spacing: 1px;
    text-align: center;
    margin-top: 60px;
    margin-bottom: 80px;
}

.body4 div {
    width: 838px;
    margin: auto;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.body4 div span {
    display: block;
    display: flex;
    justify-content: space-between;
    width: 400px;
    margin-bottom: 25px;
}

.body4 div span p {
    width: 86px;
    font-size: 20px;
    color: #333;
    letter-spacing: 1px;
    text-align: right;
    line-height: 36px;
}

.body4 div span input {
    width: 252px;
    height: 36px;
    border: 1px solid #c7c7c7;
    border-radius: 4px;
    background: #fff;
    padding: 0 20px;
}

.body4 button {
    width: 183px;
    height: 42px;
    background: #1177e0;
    color: #fff;
    letter-spacing: 3px;
    border-radius: 4px;
    margin: auto;
    margin-top: 50px;
    font-size: 20px;
}

.telAd {
    width: 1650px;
    height: 370px;
    margin-bottom: 100px;
}