body {
    line-height: normal;
    overflow: visible;
}

.container {
    position: relative;
    width: 1200px;
    height: 100%;
    padding: 0;
    left: 50%;
    transform: translateX(-50%);
}

a,
a:hover,
a:focus {
    color: inherit;
}

.box-inline {
    display: inline-block;
    vertical-align: top;
}

.font-size-32 {
    font-size: 32px;
}

.font-size-24 {
    font-size: 24px;
}

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

.font-size-18 {
    font-size: 18px;
}

.font-size-16 {
    font-size: 16px;
}

.font-size-14 {
    font-size: 14px;
}

.grayscale-level75 {
    opacity: .75;
}

.grayscale-level8 {
    opacity: .8;
}

.bgcolor-f7 {
    background-color: #F7F7F7;
}

.bgcolor-f9 {
    background-color: #F9F9F9;
}

.m-t-25 {
    margin-top: 25px;
}

.m-l-10 {
    margin-left: 10px;
}

.m-r-10 {
    margin-right: 10px;
}

.m-r-20 {
    margin-right: 20px;
}

.m-r-30 {
    margin-right: 30px;
}

.m-b-10 {
    margin-bottom: 10px;
}

.m-b-25 {
    margin-bottom: 25px;
}

.m-b-30 {
    margin-bottom: 30px;
}

.float-left {
    float: left;
}

.float-right {
    float: right;
}




.banner {
    width: 100%;
    height: 400px;
    position: relative;
}

.banner-center-con {
    position: absolute;
    top: 58%;
    transform: translateY(-50%);
    color: #061828;
    font-weight: 400;
    text-align: left;
}

.banner-title {
    font-size: 42px;
}

.banner-slogan {
    margin: 15px 0;
    width: 580px;
    font-size: 16px;
    line-height: 32px;
}

.section-nav-con {
    width: 1200px;
    height: 60px;
    margin: 0 auto;
    text-align: left;
    position: relative;
}

.section-nav {
    position: sticky;
    position: -webkit-sticky;
    top: 0;
    z-index: 100;
    width: 100%;
    height: 60px;
    color: #061828;
    background-color: #fff;
}

.section-nav-item {
    cursor: pointer;
    display: inline-block;
    margin-right: 100px;
    height: 60px;
    line-height: 60px;
    font-size: 16px;
    font-weight: 400;
    color: #303030;
}

.section-nav-more {
    float: right;
    cursor: pointer;
    height: 60px;
    line-height: 60px;
    font-size: 16px;
    font-weight: 400;
    color: #303030;
    display: flex;
    align-items: center;
}

.section-nav-more span {
    width: 20px;
    height: 20px;
    margin-left: 5px;
    background: #FFFFFF url(../images/novice-classroom/select-static.png) center no-repeat;
    background-size: 80% 80%;
}
.section-nav-more span.icon-selected {
    transition: .3s ease;
    background: #FFFFFF url(../images/novice-classroom/select-active.png) center no-repeat;
    background-size: 80% 80%;
}
.section-nav-option {
    height: 0;
    position: absolute;
    right: -10px;
    top: 33px;
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    overflow: hidden;
}
.section-nav-option.option-show {
    transition: .3s ease;
    height: auto;
}
.section-nav-option-icon {
    width: 0;
    height: 0;
    border: 10px solid;
    border-color: transparent transparent #e4e4e8;
    margin: 0 10px;
}
.section-nav-option-item {
    background: #e4e4e8;
    padding: 0 10px;
    border-radius: 2px;
}
.section-nav-option-item p {
    padding: 0 20px;
    font-size: 16px;
    font-weight: 400;
    color: #303030;
    line-height: 38px;
    border-bottom: 1px solid #dedbdb;
}
.section-nav-option-item p:hover {
    color: #0f6fea;
}

.nav-item-active {
    border-bottom: 3px solid rgb(0, 134, 241);
}

.section {
    width: 100%;
    padding: 70px 0;
    color: #061828;
}

.section-title {
    font-size: 32px;
    font-weight: 500;
}

.section-subtitle {
    font-size: 14px;
    font-weight: 400;
    opacity: .75;
}

.con1-cont {
    width: 100%;
    margin: 20px;
}

.con1-box {
    margin: 30px 0;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.con1-box a {
    margin: 0 auto;
}

.con1-box-item {
    width: 394px;
    height: 180px;
    background-color: #fff;
    padding: 30px 35px;
    margin: 0 auto 10px;
    overflow: hidden;
}

.con1-box-item:hover {
    box-shadow: 0 5px 10px 0 rgba(18, 32, 46, 0.14);
    transition: all 0.3s;
}

.con1-box-item:hover > .con1-box-title {
    color: #0086F1;
    transition: all 0.3s;
}

.con1-box-title {
    font-size: 20px;
    font-weight: 500;
    line-height: 38px;
    text-align: left;
    white-space: nowrap;
    margin-bottom: 5px;
}

.con1-box-content {
    font-size: 14px;
    font-weight: 400;
    opacity: .75;
    line-height: 24px;
    text-align: left;
}

.con2-box {
    margin-top: 45px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.con2-box-item {
    width: 394px;
    height: 260px;
    background-color: #fff;
    padding: 35px;
    margin: 0 auto 25px;
    box-shadow: 1px 2px 10px 0px rgba(38, 38, 38, .1);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    /* opacity: 0; */
}

.con2-box-item:hover {
    box-shadow: 0 5px 10px 0 rgba(18, 32, 46, 0.14);
    transition: all 0.3s;
}

.con2-box-title {
    font-size: 20px;
    font-weight: 500;
    line-height: 24px;
    text-align: left;
    white-space: nowrap;
    margin-bottom: 25px;
}

.con2-box-text {
    font-size: 14px;
    font-weight: 400;
    line-height: 38px;
    opacity: 0.75;
    text-align: left;
    white-space: nowrap;
}

.con2-box-text:hover {
    color: #0086F2;
    transition: all 0.3s;
}

.con2-more {
    margin-top: 15px;
    cursor: pointer;
}

.con2-more p {
    display: inline-block;
    vertical-align: middle;
    font-size: 16px;
    font-family: PingFang;
    font-weight: 400;
    line-height: 24px;
    color: #0186F2;
}

.con2-more img {
    height: 14px;
    margin: 5px 10px;
}

.con3-box {
    margin-top: 45px;
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    justify-content: center;
}

.con3-box-item {
    width: 291px;
    height: 312px;
    background-color: #fff;
    padding: 35px 32px;
    box-shadow: 1px 2px 10px 0px rgba(38, 38, 38, .06);
    overflow: hidden;
    /* margin: 0 auto; */
}

.con3-box-item:nth-child(n+2) {
    margin-left: 10px;
}

.con3-box-item:hover {
    box-shadow: 0 5px 10px 0 rgba(18, 32, 46, 0.14);
    transition: all 0.3s;
}

.con3-box-header {
    margin-bottom: 30px;
}

.con3-box-header-img {
    height: 54px;
    height: 54px;
    margin-right: 10px;
}

.con3-box-header-title {
    display: inline-block;
    vertical-align: middle;
    font-size: 20px;
    font-weight: 500;
    line-height: 54px;
}

.con3-box-body {
    font-size: 14px;
    font-weight: 400;
    line-height: 24px;
    text-align: left;
}

.con3-box-btn {
    width: 120px;
    height: 40px;
    background-color: #00CCFE;
    color: #fff;
    font-size: 16px;
    font-weight: 500;
    line-height: 40px;
    margin: 35px auto 0 auto;
}

.con4-box {
    margin-top: 45px;
    display: flex;
    flex-direction: row;
    display: flex;
    justify-content: center;
}

.con4-box-item {
    width: 300px;
    height: 343px;
    background-color: #FBFCFE;  
    border: 1px solid #EDEBEC;
    margin: 0 -1px 0 0;
    position: relative;
    overflow: hidden;
}

.con4-box-item:hover {
    z-index: 1;
    background-color: #fff;
    border: 1px solid #0084EF;
    transition: all 0.3s;
}

.con4-box-body p:hover {
    color: #0086F1;
    transition: all 0.3s;
}

.con4-box-header {
    height: 112px;
    background-color: #FAFAFA;
    border-bottom: 1px solid #EDEBEC;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.con4-box-header-img {
    width: 35px;
    height: 35px;
    margin-bottom: 10px;
}

.con4-box-header-img-hover {
    display: none;
    width: 35px;
    height: 35px;
    margin-bottom: 10px;
}

.con4-box-header-title {
    font-size: 20px;
    font-weight: 500;
    line-height: 24px;
}

.con4-box-body {
    padding: 27px 38px;
}

.con4-box-body-text {
    text-align: left;
    font-size: 14px;
    font-weight: 400;
    line-height: 48px;
    opacity: 0.75;
}