* {
    margin: 0;
    padding: 0;
    max-width: 100%;
    box-sizing: border-box;
    object-fit: contain;
}

a {
    outline: none;
    color: initial;
    text-decoration: none;
}

img {
    display: block;
}

.flex {
    display: flex;
    align-items: center;
}


.m-1400 {
    max-width: 1404px;
    margin: 0 auto;
}

/*  */

.nav {
    height: 90px;
    padding: 0 30px;
    justify-content: space-between;
    background-color: white;
}

.nav_logo {
    width: 164px;
    height: 42px;
    margin-right: 74px;
}

.nav_tabs {
    font-weight: 400;
    font-size: 12px;
    color: #222222;
}

.nav_tabs .nav_tabs_item {
    margin-right: 55px;
    padding: 5px 0;
    cursor: pointer;
}

.nav_tabs .nav_tabs_item.on {
    position: relative;
    color: #057CFB;
}

.nav_tabs .nav_tabs_item.on::after {
    content: "";
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    bottom: 0;
    width: 24px;
    height: 2px;
    background: #057CFB;
}

.nav_search {
    width: 247px;
    height: 34px;
    border-radius: 4px 4px 4px 4px;
    border: 1px solid #E4E4E4;
    padding: 8px 11px;
    justify-content: space-between;
    margin-right: 10px;
}

.nav_search input {
    border: none;
    outline: none;
    flex-grow: 1;
}

.nav_search img {
    width: 17px;
    min-width: 17px;
    height: 17px;
    margin-left: 10px;
}

.nav_login {
    width: 66px;
    height: 34px;
    background: #4878F0;
    border-radius: 4px 4px 4px 4px;
    font-weight: 400;
    font-size: 12px;
    color: #FFFFFF;
    justify-content: center;
}

/*  */
.banner {
    width: 100%;
    cursor: pointer;
}

/*  */

.one {
    justify-content: center;
    padding: 127px 0;
}

.one_item {
    width: 217px;
    height: 328px;
    background: #86CCDF;
    box-shadow: 0px 4px 10px 0px rgba(170, 170, 170, 0.3);
    border-radius: 10px 10px 10px 10px;
    margin-right: 20px;
    overflow: hidden;
    cursor: pointer;
}

.one_item:hover .one_item_cont,
.one_item:hover .one_item_cont::after {
    color: white;
}

.one_item:nth-of-type(1):hover .one_item_cont,
.one_item:nth-of-type(1):hover .one_item_cont::after {
    background-color: #86CCDF;
}

.one_item:nth-of-type(2):hover .one_item_cont,
.one_item:nth-of-type(2):hover .one_item_cont::after {
    background-color: #9085E1;
}

.one_item:nth-of-type(3):hover .one_item_cont,
.one_item:nth-of-type(3):hover .one_item_cont::after {
    background-color: #4679BA;
}

.one_item:nth-of-type(4):hover .one_item_cont,
.one_item:nth-of-type(4):hover .one_item_cont::after {
    background-color: #60A68A;
}

.one_item:nth-of-type(5):hover .one_item_cont,
.one_item:nth-of-type(5):hover .one_item_cont::after {
    background-color: #64ACBF;
}

.one_item:nth-of-type(6):hover .one_item_cont,
.one_item:nth-of-type(6):hover .one_item_cont::after {
    background-color: #A154BB;
}

.one_item:hover .icon {
    display: none;
}

.one_item:hover .icons {
    display: block;
}

.one_item:last-of-type {
    margin-right: 0;
}

.one_item_img {
    width: 217px;
    height: 149px;
}

.one_item_img img {
    width: 100%;
    height: 100%;
}

.one_item_cont {
    background-color: white;
    padding: 0 22px 35px;
    text-align: center;
    position: relative;
    color: #3D3D3D;
    transition: 0.35s;
}

.one_item_cont::after {
    content: "";
    height: 20px;
    width: 179px;
    background-color: white;
    position: absolute;
    left: 50%;
    top: -20px;
    transform: translateX(-50%);
    transition: 0.35s;
}

.one_item_cont .icon,
.one_item_cont .icons {
    text-align: center;
    margin: 0 auto;
}

.one_item_cont .icons {
    display: none;
}

.one_item_cont .title {
    font-weight: 400;
    font-size: 18px;
    line-height: 20px;
    margin-top: 13px;
    margin-bottom: 28px;
}

.one_item_cont .small {
    font-weight: 400;
    font-size: 12px;
    line-height: 20px;
}

/*  */

.course {
    background-color: #FAFAFA;
    padding: 94px 0;
}

.course_logo {
    margin: 0 auto 70px;
}

.course_list {
    justify-content: center;
}

.course_item {
    width: 320px;
    height: 570px;
    margin-right: 20px;
    border-radius: 10px;
    padding: 50px;
    background-color: black;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    transition: 0.35s;
    background-repeat: no-repeat;
    background-size: cover;
}

.course_item:hover {
    width: 740px;
}

.course_item:hover .info {
    display: block;
}

.course_item:hover::after {
    content: "";
    width: 100%;
    height: 150px;
    background: linear-gradient(to bottom, rgba(0,0,0,0), rgba(0,0,0,1));
    position: absolute;
    left: 0;
    bottom: 0;
}

.course_item .name {
    width: 122px;
    height: 40px;
    background: #057CFB;
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.course_item .info {
    font-weight: 400;
    font-size: 20px;
    color: #FFFFFF;
    line-height: 37px;
    margin-top: 20px;
    display: none;
    position: relative;
    z-index: 2;
}

/*  */

.expert {
    padding: 94px 0;
}

.expert_logo {
    margin: 0 auto 70px;
}

.expert_list {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
}

.expert_item {
    width: 336px;
    height: 196px;
    margin-right: 20px;
    margin-bottom: 40px;
    position: relative;
    cursor: pointer;
}

.expert_item .img {
    width: 100%;
    height: 100%;
}

.expert_item .name {
    width: 336px;
    height: 44px;
    background: #000000;
    font-weight: 400;
    font-size: 16px;
    color: #FFFFFF;
    line-height: 19px;
    position: absolute;
    left: 0;
    bottom: 0;
    display: flex;
    align-items: center;
    padding: 0 20px;
    overflow:hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
    -o-text-overflow: ellipsis;
}

.expert_item:nth-of-type(4n) {
    margin-right: 0;
}

/*  */

.basis {
    background-color: #FAFAFA;
    padding: 94px 0;
}

.basis_logo {
    margin: 0 auto 70px;
}

.basis_tabs {
    justify-content: space-between;
    margin-bottom: 40px;
}

.basis_tabs_item {
    font-weight: 400;
    font-size: 16px;
    padding-bottom: 11px;
    color: #3D3D3D;
    margin-right: 40px;
}

.basis_tabs_item.on {
    font-weight: 400;
    font-size: 22px;
    color: #057CFB;
    position: relative;
}

.basis_tabs_item.on::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(270deg, #057CFB 0%, rgba(255, 255, 255, 0) 100%);
    border-radius: 0px 0px 0px 0px;
}

.basis_tabs_item .right {
    font-weight: 400;
    font-size: 14px;
    color: #3D3D3D;
    line-height: 20px;
}

.basis_list {
    display: flex;
    flex-wrap: wrap;
}

.basis_item {
    width: 336px;
    margin-right: 20px;
    border-radius: 5px;
    overflow: hidden;
    background-color: white;
    margin-bottom: 30px;
}

.basis_item:nth-of-type(4n) {
    margin-right: 0;
}

.basis_cont {
    padding: 20px 10px;
}

.basis_img {
    width: 100%;
    height: 196px;
}

.basis_item .name {
    font-weight: 400;
    font-size: 16px;
    color: #333333;
    line-height: 24px;
    margin-bottom: 10px;
}

.basis_item .num img {
    width: 16px;
    height: 10px;
    margin-right: 5px;
}

.basis_item .num {
    font-weight: 400;
    font-size: 16px;
    color: #3D3D3D;
    display: flex;
    align-items: center;
}

/*  */

.footer {
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

.footer_cont {
    display: flex;
    padding: 63px 160px;
}

.footer_item {
    margin-right: 214px;
}

.footer_item:last-of-type {
    margin-right: 0;
}

.footer_item .label {
    font-weight: 400;
    font-size: 18px;
    color: #FFFFFF;
    line-height: 19px;
    padding-left: 10px;
    border-left: 4px solid white;
    margin-bottom: 10px;
}

.footer_item .value {
    font-weight: 400;
    font-size: 12px;
    color: #FFFFFF;
    line-height: 30px;
}

.footer_item:nth-of-type(1) {
    width: 360px;
}

.footer_item img {
    margin-top: 40px;
    width: 150px;
    height: 150px;
}

/*  */

.tip {
    width: 1920px;
    height: 71px;
    background: #19213B;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 400;
    font-size: 12px;
    color: #FFFFFF;
    line-height: 20px;
    text-align: center;
}

/* */

.nav_tabs_item:hover {
    position: relative;
}

.appDown {
    display: none;
    min-width: 140px;
    position: absolute;
    left: -45px;
    bottom: -170px;
    background-color: white;
    padding: 10px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border-radius: 6px;
    box-shadow: 0 0 10px rgba(0, 0, 0, 0.2);
}

.appDown img {
    width: 100px;
    min-width: 100px;
    height: 100px;
    margin-bottom: 10px;
}

.appDown p {
    font-size: 16px;
    text-align: center;
}

.nav_tabs_item:hover .appDown {
    display: flex;
}