.banner {
    width: 100%;
    height: 620px;
    background: url(http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/banner/banner_client.png) no-repeat center center;
    background-size: cover!important;
    display: flex;
    position: relative;
}

.banner_swiper {}

.banner_txt {
    margin-top: 180px;
    position: absolute;
    /* top: 167px; */
}

.banner_title {
    font-size: 42px;
    font-weight: 600;
    text-align: left;
    color: #ffffff;
    line-height: 60px;
}

.banner_summary {
    flex-wrap: wrap;
    width: 720px;
    margin-top: 28px;
}

.banner_summary li {
    font-size: 16px;
    font-weight: 400;
    text-align: justify;
    color: #ffffff;
    line-height: 24px;
    margin-bottom: 16px;
    margin-right: 70px;
    display: flex;
    align-items: center;
}

.banner_summary li i {
    width: 10px;
    height: 3px;
    background: #ffffff;
    border-radius: 3px;
    display: block;
    margin-right: 8px;
}

.banner_btn {
    margin-top: 48px;
}

.teacher {
    width: 100%;
    height: 650px;
    background: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
}

.teacher_content {
    margin: 0 auto;
    margin-top: 100px;
    display: flex;
}

.teacher_leftSide {
    width: 500px;
}

.teacher_leftSide_headline {
    font-size: 28px;
    font-weight: 500;
    text-align: left;
    color: #333333;
    margin-top: 65px;
}

.teacher_leftSide_headline span {
    font-size: 20px;
}

.teacher_leftSide ul {
    margin-top: 30px;
}

.teacher_leftSide li {
    font-size: 16px;
    font-weight: 400;
    text-align: left;
    color: #666666;
    line-height: 24px;
    margin-bottom: 24px;
    position: relative;
    margin-left: 24px;
}

.teacher_leftSide li span {
    width: 8px;
    height: 8px;
    background: #1472ff;
    border-radius: 50%;
    display: inline-block;
    position: absolute;
    left: -21px;
    top: 8.5px;
}

.freeTrial {
    width: 148px;
    height: 44px;
    background: #1472ff;
    border-radius: 27px;
    color: #ffffff;
    text-align: center;
    line-height: 44px;
    cursor: pointer;
    font-weight: 400;
    margin-top: 26px;
}
.freeTrial a{
    color: #fff;
    width: 100%;
    height: 100%;
    display: block;
}
.freeTrial:hover {
    background: linear-gradient(180deg, #2dabff, #1472ff) !important;
    box-shadow: 0px 8px 16px 0px rgba(55, 99, 170, 0.10) !important;
}

.teacher_rightSide {
    width: 616px;
    height: 470px;
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/teacherClient.png') no-repeat;
    background-size: 100% 100%;
    margin-top: 13px;
}

.student {
    height: 710px;
    background: #f6f9fd;
}

.student .teacher_rightSide {
    width: 597px;
    height: 446px;
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/studentClient.png') no-repeat;
    background-size: 100% 100%;
}

.detection .teacher_rightSide {
    width: 597px;
    height: 446px;
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/detection.png') no-repeat;
    background-size: 100% 100%;
}

.feature {
    width: 100%;
    height: 796px;
    background: #F3F7FF;
}

.featureBg {
    width: 100%;
    height: 796px;
    margin: 0 auto;
    overflow: hidden;
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/featureBg.png') no-repeat;
    background-size: 100% 100%;
}

.feature_content {
    width: 1150px;
    margin: 0 auto;
    overflow: hidden;
}

.feature_content_headline {
    text-align: center;
    font-size: 30px;
    font-weight: 600;
    text-align: center;
    color: #333333;
    margin-top: 100px;
}

.feature_content p {
    font-size: 16px;
    font-weight: 400;
    text-align: center;
    color: #1472ff;
    margin-top: 20px;
    cursor: pointer;
}

.featureAll {
    width: 100%;
    margin-top: 40px;
}

.featureAll_topSide {
    display: flex;
    justify-content: space-between;
}

.featureEvery {
    width: 214px;
    height: 220px;
    overflow: hidden;
    border: 1px solid transparent;
    border-radius: 20px;
    transition-duration: 0.3s;
}

.featureEvery .iconBiger {
    width: 100px;
    height: 100px;
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconA.png') no-repeat;
    background-size: 100% 100%;
    margin: 0 auto;
    margin-top: 39px;
    transition-duration: 0.3s;
}

.textBiger {
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    color: #333333;
    margin-top: 20px;
    transition-duration: 0.3s;
}

.textSmall {
    font-size: 14px;
    font-weight: 400;
    text-align: center;
    color: #666666;
    margin-top: 10px;
    transition-duration: 0.3s;
    /* display: none; */
    opacity: 0;
    padding: 0 24px;
    box-sizing: border-box;
}

.featureAll_topSide:nth-of-type(2) {
    margin-top: 30px;
}

.featureAll_topSide:nth-of-type(1) .featureEvery:nth-of-type(2) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconB.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(1) .featureEvery:nth-of-type(3) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconC.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(1) .featureEvery:nth-of-type(4) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconD.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(1) .featureEvery:nth-of-type(5) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconE.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(1) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconF.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(2) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconG.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(3) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconH.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(3) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconH.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(4) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconI.png') no-repeat;
    background-size: 100% 100%;
}

.featureAll_topSide:nth-of-type(2) .featureEvery:nth-of-type(5) .iconBiger {
    background: url('http://public-test-shengtong.oss-cn-zhangjiakou.aliyuncs.com/yixiao-pc/product/icon/iconJ.png') no-repeat;
    background-size: 100% 100%;
}

.featureEvery:hover {
    background: linear-gradient(180deg, rgba(247, 249, 255, 0.66), rgba(246, 249, 255, 0.29));
    border: 1px solid #ffffff;
    border-radius: 20px;
    box-shadow: 4px 4px 20px -2px rgba(55, 99, 170, 0.10);
    margin-top: -20px;
}

.featureEvery:hover .iconBiger {
    width: 64px;
    height: 64px;
}

.featureEvery:hover .textBiger {
    margin-top: 24px;
}

.featureEvery:hover .textSmall {
    /* display: block; */
    opacity: 1;
}


/* footer */

.footer_synopsis {
    padding-bottom: 21px;
}

.footer_synopsis p {
    font-size: 12px;
    font-weight: 400;
    text-align: left;
    color: #666666;
    line-height: 20px;
}

.footer_logo {
    width: 41.23px;
    height: 23px;
    margin-bottom: 21px;
}

.information_flexd {
    position: fixed;
    bottom: 0;
    z-index: 20;
}

.dom_none {
    display: none;
}