* {
    bottom: 0;
    margin: 0;
    box-sizing: border-box;
}

.main{
    width: 80%;
}

.item{
    cursor: pointer;
}

a {
    text-decoration: none; /* 去除下划线 */
    color: inherit; /* 使用继承的文本颜色 */
}

img {
    display: block;
}

.main {
    width: 1920px;
    margin: auto;
    /* background-color: #656565;
    height: 9999px; */
}

.contact {
    position: fixed;
    right: 0;
    top: 240px;
    z-index: 999;
    width: 108px;
    height: 276px;
    font-size: 40px;
    font-weight: 600;
    color: #ffffff;
    writing-mode: tb-rl;
    letter-spacing: 10px;
    background-color: #5bcfda;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
}

.banner {
    background-color: #ebfcfc;
    padding: 98px 130px 40px;
}

.banner_top {
    display: flex;
}

.banner_top_img {
    display: block;
    width: 125px;
    height: 130px;
    margin-left: 15px;
}

.tab_ber {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 40px;
    color: #bcbcbc;
    margin-left: 220px;
    width: 1240px;
}

.item_select {
    color: #5bcfda;
    margin-top: 38px;
}


.item_select_border {
    width: 100%;
    background-color: #5bcfda;
    margin-top: 18px;
    height: 18px;
    border-radius: 18px;
}

.banner_content {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.banner_content_arrows {
    position: absolute;
    top: 50%;
    width: 40px;
    height: 56px;
}

.left_arrows {
    left: -70px;
}

.right_arrows {
    right: -70px;
}

.banner_content_arrows>img {
    width: 100%;
}

.banner_content_left {
    padding-left: 32px;
}

.banner_content_left_title {
    font-size: 90px;
    font-weight: 600;
    color: #4c4c4c;
}

.banner_content_left_con {
    font-size: 40px;
    color: #4c4c4c;
    margin-top: 50px;
}

.banner_content_right {
    width: 890px;
    height: 620px;
    overflow: hidden;
    display: flex;
    align-items: center;
}

.banner_content_right_img {
    width: 890px;
    display: block;
}

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

.banner_bottom_left {
    background-color: #5bcfda;
    width: 360px;
    height: 110px;
    border-radius: 110px;
    display: flex;
    align-items: center;
    color: #ffffff;
    font-size: 40px;
    font-weight: 600;
}

.banner_bottom_left_image {
    width: 80px;
    height: 80px;
    margin-left: 34px;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
}


.banner_bottom_left_title {
    margin-left: 20px;
    letter-spacing: 4px;
}

.banner_bottom_right {
    display: flex;
    align-items: flex-end;
    font-size: 40px;
    color: #4e9ba3;
}

.banner_bottom_right>span {
    margin: 0 18px;
}

.introduce {
    font-size: 28px;
    color: #4e4e4e;
    width: 1630px;
    text-indent: 20px;
    margin: auto;
    letter-spacing: 5px;
    margin-top: 128px;
    margin-bottom: 130px;
}

.column_title {
    width: 500px;
    height: 132px;
    background-color: #5bcfda;
    color: #ffffff;
    font-size: 48px;
    font-weight: 600;
    margin: auto;
    border-radius: 0 46px 0 46px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.my_serve {
    padding: 0 130px;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-top: 158px;
    margin-bottom: 100px;
}

.serve_item {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 370px;
    height: 370px;
    background-color: #e4fafc;
    border-radius: 60px;
    box-shadow: 7px 6px 0 0 #caeaef, 17px 20px 20px 0 #ababab50;
    font-size: 58px;

    font-weight: 600;
    color: #7d7d7d;
    margin-bottom: 88px;
}

.serve_item>img {
    width: 240px;
}

.my_resource {
    display: flex;
    justify-content: center
}

.my_resource_item {
    width: 470px;
    height: 408px;
    border-radius: 100px;
    padding: 80px 50px 70px;
    color: #ffffff;
    margin: 180px 30px 192px;
    box-shadow: 7px 8px 20px 0 #ababab50;
}

.my_resource_item:nth-child(1) {
    background-color: #ffd860;
}

.my_resource_item:nth-child(2) {
    background-color: #ffb541;
}

.my_resource_item:nth-child(3) {
    background-color: #5bcfda;
}

.my_resource_item_data {
    font-size: 74px;

}

.my_resource_item_border {
    height: 24px;
    width: 200px;
    border-radius: 24px;
    margin: 36px 0;
    background-color: #fff;
}

.my_resource_item_title {
    font-size: 58px;
}

.past_lecture {
    padding: 0 130px;
    margin-top: 152px;
}

.past_lecture_top {
    display: flex;
    justify-content: space-between;


}

.past_lecture_top_item {
    width: 786px;
    height: 466px;
}

.past_lecture_top_item>img {
    width: 100%;
    height: 100%;
    display: block;
}

.past_lecture_bottom {
    letter-spacing: 10px;
    font-size: 50px;
    text-align: right;
    color: #5bcfda;
    font-weight: 600;
    margin-top: 40px;
    margin-bottom: 120px;
    padding: 0 130px;
}

/* 名校录取案例 */
.admission_case {
    position: relative;
    width: 1664px;
    background-color: #f0f0f0;
    display: flex;
    justify-content: space-between;
    padding: 46px 68px 30px;
    border-radius: 24px;
    margin: 154px auto 64px;
}

.admission_case_img {
    width: 464px;
    height: 648px;
}

.admission_case_img>img {
    width: 100%;
    height: 100%;
}

.admission_case_btn {
    position: absolute;
    top: 50%;
    width: 40px;
    height: 52px;
}

.admission_case_btn>img {
    width: 100%;
    height: 100%;
}

.admission_case_left {
    left: -56px;
}

.admission_case_right {
    right: -56px;
}

/* 学校排名 */
.school_ranking {
    display: flex;
    justify-content: space-between;
    padding: 0 176px;
    margin-bottom: 158px;
}

.school_ranking_item {
    background-color: #e4fafc;
    width: 470px;
    height: 164px;
    font-size: 40px;
    border-radius: 42px;
    text-align: center;
    padding-top: 32px;
    box-shadow: 10px 8px 40px 0px rgba(162, 162, 162, 0.379);
}

.school_ranking_item_con>span {
    font-size: 42px;
    color: #ffae00;
    margin-left: 24px;
}

/* 资深导师团队 */
.tutor_team {
    display: flex;
    justify-content: space-between;
    padding: 0 130px;
    margin-top: 150px;
}

.tutor_team_item {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tutor_team_item_img {
    width: 306px;
    height: 306px;
    overflow: hidden;
    border-radius: 50%;
}

.tutor_team_item_img>img {
    width: 100%;
    height: 100%;
}

.tutor_team_item_content {
    background-color: #f1f1f1;
    width: 386px;
    padding: 30px 15px;
    border-radius: 0 50px 0 50px;
    box-shadow: 10px 8px 40px 0 rgba(138, 138, 138, 0.491);
    margin: 74px 0 160px;

}

.tutor_team_item_content_tittle {
    display: flex;
    align-items: center;
    font-size: 40px;
}

.tutor_team_item_content_tittle>img {
    width: 40px;
    height: 40px;
}

.tutor_team_item_content_tittle>span {
    margin-left: 40px;
    font-weight: 600;
    color: #686868;
}

.tutor_team_item_content_con {
    margin-top: 34px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 90px;
    overflow: hidden;
}

.tutor_team_item_content_con>p {
    font-size: 22px;
    letter-spacing: 6px;
}

/* 原创文章 */
.original_article {
    padding: 0 130px;
    margin-top: 110px;
}

.original_article_content {
    background-color: #f1f1f1;
    padding: 60px;
    border-radius: 50px;
    display: flex;
    flex-wrap: wrap;
}

.original_article_item {
    width: 730px;
    height: 310px;
    background-color: #fff;
}

.original_article_item:nth-child(1) {
    margin-right: 78px;
}

.original_article_item:nth-child(3) {
    margin-right: 78px;
    margin-top: 34px;
}

.original_article_item:nth-child(4) {
    margin-top: 34px;
}

/* 科维现有平台 */
.existing_platform {
    position: relative;
    height: 980px;
}

.existing_platform_item {
    position: absolute;
    background-color: #f1f1f1;
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;

}

.existing_platform_item:nth-child(1) {
    top: 224px;
    left: 170px;

}

.existing_platform_item:nth-child(2) {
    top: 280px;
    right: 610px;

}

.existing_platform_item:nth-child(3) {
    top: 180px;
    right: 206px;

}

.existing_platform_item:nth-child(4) {
    top: 290px;
    left: 590px;

}

.existing_platform_item:nth-child(5) {
    top: 540px;
    left: 750px;

}

.existing_platform_item:nth-child(6) {
    top: 560px;
    right: 320px;

}

.existing_platform_item:nth-child(7) {
    top: 110px;
    left: 490px;

}

.existing_platform_item:nth-child(8) {
    top: 620px;
    left: 330px;

}

.existing_platform_big {
    width: 330px;
    height: 330px;
    text-align: center;
    font-size: 40px;
}

.existing_platform_big>img {
    width: 140px;
    height: 140px;
    margin-top: 60px;
}

.existing_platform_big>p {
    margin-top: 20px;
    font-weight: 600;
    letter-spacing: 6px;
}

.existing_platform_medium {
    width: 250px;
    height: 250px;
    font-size: 34px;
}

.existing_platform_medium>img {
    margin-top: 20px;
    width: 124px;
    height: 124px;
}

.existing_platform_medium>p {
    margin-top: 18px;
}

.existing_platform_small {
    width: 180px;
    height: 180px;
    font-size: 30px;

}

.existing_platform_small>img {
    margin-top: 20px;
    width: 82px;
    height: 82px;

}

.existing_platform_small>p {
    margin-top: 12px;
}

/* 底部内容 */
.footer {
    position: relative;
    display: flex;
    justify-content: center;
    padding: 80px 0 240px 0;
    background-color: #ebfcfc;
}

.footer>dl {
    font-size: 50px;
    text-align: center;

}

.footer>dl:nth-child(2) {
    margin: 0 270px;
}

.footer>dl>dt {
    margin-bottom: 36px;
    color: #5a5a5a;
}

.footer>dl>dd {
    font-size: 34px;
    margin-bottom: 24px;
    color: #9c9c9c;
}

.footer_QR_code {
    position: absolute;
    left: 206px;
    bottom: 100px;

    width: 160px;
    height: 160px;
}

.footer_QR_code>img {
    width: 100%;
    height: 100%;
}


/* 基本样式 */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    min-width: 300px;
    box-shadow: 0px 8px 16px 0px rgba(0, 0, 0, 0.2);
    
    z-index: 1;
    top: 60px; /* 调整下拉菜单的垂直位置 */
    left: -20px;
}

.dropdown:hover .dropdown-content {
    display: block;
}

/* 菜单项样式 */
.dropdown-content a {
    padding: 12px 16px;
    text-decoration: none;
    display: block;
    color: #333;
    background-color: rgba(235, 252, 252, 0.8); /* 使用 rgba 函数设置透明度 */
}

.dropdown-content a:hover {
    background-color: #ddd;
}